JP7161740B2 - biopsy needle - Google Patents

Description

The present invention relates to a biopsy needle for sampling a part of living tissue, particularly to a biopsy needle used in endoscopic ultrasound-guided fine needle aspiration (EUS-FNA).

EUS-FNA is a procedure in which a biopsy needle is inserted into the gastrointestinal tract to collect tissue from inside the tumor while observing the target organ (for example, the pancreas) under ultrasound. The development of biopsy needles used in this EUS-FNA has been progressing.

For example, in Patent Document 1 (Japanese Patent Laid-Open No. 11-226024), an excision wire (snare) is inserted into a biopsy needle in a closed state, and when the tip of the biopsy needle comes close to a predetermined tissue, the snare is pulled. is pushed out and expanded toward the tip side of the biopsy needle by the self-expanding action of the snare, and in this state, the expanded snare and the tip side of the biopsy needle are brought into contact with the biological tissue, and the inside of the biopsy needle is maintained at a negative pressure. By doing so, the living tissue is aspirated into the biopsy needle through the expanded snare and the distal end of the biopsy needle, and then the snare is drawn into the biopsy needle and housed therein, thereby binding and excising the living tissue, thereby producing a piece of living tissue. A biopsy needle is disclosed that is configured to collect into the biopsy needle.

In addition, Patent Document 2 (Japanese Patent Application Laid-Open No. 2011-030913) discloses a wedge-shaped tissue storage chamber having a rectangular tissue collection opening face that opens obliquely forward to the distal end, and a flexible sheath. A movable thin blade that advances and retracts along the tissue sampling opening surface by operation from the proximal side is provided, and a distal fixed blade is horizontally arranged along the distal end side of the tissue sampling opening surface over the entire width of the tissue sampling opening surface. and a biopsy needle configured to collect a piece of living tissue in the tissue storage chamber by excising the living tissue that enters the tissue storage chamber when the biopsy needle is inserted into the tissue storage chamber with a movable thin blade. Meter readings are disclosed.

In the biopsy needle disclosed in Patent Document 1, the excision wire (snare) needs to be punctured into the living tissue while being expanded in diameter, but there is a risk that the snare will malfunction due to the large resistance during puncture. . In addition, the biopsy needle disclosed in Patent Document 2 can collect only the tissue drawn into the tip of the needle, and the amount of specimen collected may not be sufficient to reach a definitive diagnosis, and tissue can be collected more efficiently. A new biopsy needle was sought.

In order to solve such problems of conventional biopsy needles, the inventors have developed a wire ( developed a biopsy needle configured with a thread attached. An outline of this biopsy needle will be described with reference to FIG. 15A is a plan view of a conventional biopsy needle, and FIG. 15B is a partial longitudinal sectional view of FIG. 15A.

This biopsy needle 100 is provided with a wire 103 as cutting means for cutting tissue on an opening wall 102a of an injection needle-shaped opening 102 on the distal end side of a hollow needle portion 101 . Further, the hollow needle portion 101 is provided with through holes 104 and 105 penetrating through the wall of the hollow needle portion 101 on the rear end side of the injection needle-shaped opening 102 .

One end of the wire 103 is passed through the through hole 104 and the injection needle-shaped opening 102 and fixed to the hollow needle portion 101, and the portion extending from the one end is the injection needle. It is fixed in a loop shape on the opening wall 102a of the shaped opening with an easily peelable adhesive material, and the other end passes through the inside of the hollow needle portion 101 to the rear end of the hollow needle portion 101. It is inserted so as to extend to the outside from an opening 106 formed in the .

According to the biopsy needle having such a configuration, the wire 103 is fixed in a loop shape on the opening wall 102a of the injection needle-shaped opening 102, so that the biopsy needles disclosed in Patent Documents 1 and 2 can be used. In comparison, the resistance during puncture is small, and by simply pulling the wire 103 after the living tissue is drawn into the hollow needle portion 101 during puncture, the living tissue can be injected into the needle-shaped opening 102 on the distal end side of the hollow needle portion 101 . The tissue can be easily cut, and the amount of the biological tissue piece to be collected into the hollow needle portion 101 can be increased, and an excellent effect of being able to collect it efficiently can be obtained.

Japanese Patent Laid-Open No. 11-226024 JP 2011-030913 A Japanese Patent No. 6183858

However, in the biopsy needle 100 disclosed in Patent Document 3, the wire 103 is fixed in a loop shape on the opening wall 102a of the injection needle-shaped opening 102, so compared to the case where the wire 103 does not exist, There are problems such as increased resistance during puncture and poor sharpness, and the risk of peeling off during puncture even though the wire is fixed with an easily peelable adhesive. The inventors have made various studies to solve the problem of the biopsy needle disclosed in Patent Document 3, and as a result, have completed the present invention.

That is, the present invention provides a biopsy needle using a wire, which is particularly suitable for EUS-FNA, has low puncture resistance, the wire is difficult to separate from the biopsy needle during puncture, and the wire can easily cut living tissue. The purpose is to provide a biopsy needle.

In order to achieve the above object, the biopsy needle of the first aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both ends of the wire are passed from the rear end side of the opening wall of the injection needle-shaped opening to the outside of the hollow needle portion. or the wire extends to the rear end side of the hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has an intermediate portion detached into the annular groove One end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the needle-shaped opening, and the other end is the opening of the needle-shaped opening. extending from the rear end side of the wall to the rear end side of the hollow needle portion through the exterior of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion;
A linear groove is formed between the annular groove and the outer wall of the hollow needle portion on the rear end side of the opening wall of the injection needle-shaped opening, and the wire is formed in the linear groove. It is characterized by being fitted and fixed in the groove .

According to the biopsy needle of the first aspect, the wire is removably fitted and fixed in the annular groove formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle portion. Therefore, it becomes difficult for the wire to protrude from the opening wall of the needle-shaped opening. As a result, when the biopsy needle of the first aspect is punctured into the living tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the living tissue fragment introduced into the hollow needle portion can be increased. become able to. In addition, when pulling (pulling) both ends of the wire extending to the rear end side of the hollow needle portion after the biopsy needle of the first aspect has been pierced into the living tissue, the wire can easily be looped. The diameter of the ring becomes smaller toward the rear end portion away from the groove of the needle, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion. will be able to
In addition, one end of the wire is fixed in the annular groove near the rear end side of the opening wall of the injection needle-shaped opening, and the other end is fixed to the rear end side of the opening wall of the injection needle-shaped opening. through the inside or outside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion, the biopsy needle By manipulating (pulling) the single wire extending to the rear end side of the hollow needle portion after the living tissue is punctured, the wire can be easily removed from the annular groove and pulled toward the rear end portion. The diameter of the needle becomes smaller, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion.
In addition, since a groove is also provided in the part where the wire passes over the opening wall on the rear end side of the injection needle-shaped opening, the wire does not protrude in this part as well, and resistance when the biopsy needle is inserted into the living tissue is reduced. It becomes smaller, and the above effects are exhibited more satisfactorily.

In addition, the biopsy needle of the second aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle,
The outer wall of the hollow needle portion is provided with at least one through-hole penetrating the inside and outside of the hollow needle portion in the vicinity of the rear end side of the injection needle-shaped opening,
the wire extends through the through-hole and the inside of the hollow needle portion to the rear end side of the hollow needle portion;
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire extend from the rear end side of the opening wall of the injection needle-shaped opening through the through hole of the hollow needle portion. , the wire passes through the inside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion; An intermediate portion is removably fitted and fixed in the annular groove, one end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the needle-shaped opening, and the other end is fixed in the annular groove. extends from the rear end side of the opening wall of the injection needle-shaped opening to the rear end side of the hollow needle portion through the through hole of the hollow needle portion and through the inside of the hollow needle portion. and is operable from the rear end side of the hollow needle,
A linear groove is formed between the annular groove and the through hole of the hollow needle portion on the rear end side of the opening wall of the injection needle-shaped opening, and the wire is formed in the linear shape. characterized in that it is fitted and fixed in the groove of the

According to the biopsy needle of the second aspect, similarly to the biopsy needle of the first aspect, the wire is an annular groove formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle part. Since the wire is removably fitted and fixed inside, it is difficult for the wire to protrude from the opening wall of the needle-shaped opening. As a result, when the biopsy needle of the second aspect is punctured into the biological tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the biological tissue fragment introduced into the hollow needle portion is increased. be able to In addition, when pulling (pulling) both end sides of the wire extending to the rear end side of the hollow needle portion after the biopsy needle of the second aspect is pierced into the living tissue, the wire can easily be looped. The diameter of the ring becomes smaller toward the rear end portion away from the groove of the needle, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion. will be able to
In addition, one end of the wire is fixed in the annular groove near the rear end side of the opening wall of the injection needle-shaped opening, and the other end is fixed to the rear end side of the opening wall of the injection needle-shaped opening. through the inside or outside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion, the biopsy needle By manipulating (pulling) the single wire extending to the rear end side of the hollow needle portion after the living tissue is punctured, the wire can be easily removed from the annular groove and pulled toward the rear end portion. The diameter of the needle becomes smaller, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion.
In addition, the length of the portion of the wire extending from the annular groove positioned on the outer wall side of the hollow needle portion can be shortened, and most of the wire extending from the annular groove can be disposed in the hollow needle portion. can be in a state of being inserted into the inside of the Thereby, when the end portion of the wire extending to the rear end side of the hollow needle portion is manipulated, the wire fitted and fixed in the annular groove of the opening wall of the injection needle-shaped opening. Since the force can be easily transmitted to the intermediate portion, the wire can be more easily removed from the annular groove to cut the living tissue located in the hypodermic needle-shaped opening.

In addition, the biopsy needle of the third aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed through the inside of the hollow needle portion from the rear end side of the opening wall of the injection needle-shaped opening. or the wire extends to the rear end side of the hollow needle portion and is operably provided from the rear end side of the hollow needle portion; One end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the injection needle-shaped opening, and the other end is fixed to the opening wall of the injection needle-shaped opening extending from the rear end side through the inside of the hollow needle portion to the rear end side of the hollow needle portion and being operable from the rear end side of the hollow needle portion,
A through hole is provided between the annular groove on the rear end side of the injection needle-shaped opening and the inside of the hollow needle portion,
The wire is characterized in that it extends to the rear end side of the hollow needle through the through-hole and the inside of the hollow needle .

According to the biopsy needle of the third aspect, similarly to the biopsy needle of the first aspect, the wire is removably fitted into the annular groove formed on the surface of the opening wall of the injection needle-shaped opening. Since it is fixed, it becomes difficult for the wire to protrude from the opening wall of the needle-shaped opening. As a result, when the biopsy needle of the third aspect is punctured into the biological tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the biological tissue fragment introduced into the hollow needle portion is increased. be able to In addition, when pulling (pulling) both end sides of the wire extending to the rear end side of the hollow needle portion after the biopsy needle of the third aspect is pierced into the living tissue, the wire can easily be looped. The diameter of the ring becomes smaller toward the rear end portion away from the groove of the needle, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion. will be able to
In addition, one end of the wire is fixed in the annular groove near the rear end side of the opening wall of the injection needle-shaped opening, and the other end is fixed to the rear end side of the opening wall of the injection needle-shaped opening. through the inside or outside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion, the biopsy needle By manipulating (pulling) the single wire extending to the rear end side of the hollow needle portion after the living tissue is punctured, the wire can be easily removed from the annular groove and pulled toward the rear end portion. The diameter of the needle becomes smaller, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion.
In addition, since the wire can be prevented from being exposed to the outer wall side of the hollow needle at all, when the end of the wire extending to the rear end side of the hollow needle is manipulated, an injection needle-shaped opening can be obtained. Since it becomes easier to transmit force to the intermediate portion of the wire that is fitted and fixed in the annular groove of the opening wall of the opening wall, the wire can be more easily removed from the annular groove and positioned in the injection needle-shaped opening. It becomes possible to cut living tissue.

Further, the biopsy needle of the fourth aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed in the inner wall of the hollow needle,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed through the inside of the hollow needle portion from the rear end side of the opening wall of the injection needle-shaped opening. or the wire extends to the rear end side of the hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has an intermediate portion detached into the annular groove One end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the needle-shaped opening, and the other end is the opening of the needle-shaped opening. extending from the rear end side of the wall through the interior of the hollow needle portion to the rear end side of the hollow needle portion, and being operable from the rear end side of the hollow needle portion,
A U-shaped or J-shaped through-hole is formed between the annular groove and the inner wall of the hollow needle portion on the rear end side of the injection needle-shaped opening, and the wire is It is characterized by extending to the rear end side of the hollow needle through the through-hole and the inside of the hollow needle .

According to the biopsy needle of the fourth aspect, similarly to the biopsy needle of the first aspect, the wire is detachably fitted and fixed in the annular groove formed in the inner wall of the hollow needle portion. Therefore, it becomes difficult for the wire to protrude from the opening wall of the needle-shaped opening. As a result, when the biopsy needle of the fourth aspect is punctured into the biological tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the biological tissue piece introduced into the hollow needle portion is increased. be able to In addition, when pulling (pulling) both ends of the wire extending to the rear end side of the hollow needle portion after the biopsy needle of the fourth aspect has been pierced into the living tissue, the wire can easily be looped. The diameter of the ring becomes smaller toward the rear end portion away from the groove of the needle, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion. will be able to
In addition, one end of the wire is fixed in the annular groove near the rear end side of the opening wall of the injection needle-shaped opening, and the other end is fixed to the rear end side of the opening wall of the injection needle-shaped opening. through the inside or outside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion, the biopsy needle By manipulating (pulling) the single wire extending to the rear end side of the hollow needle portion after the living tissue is punctured, the wire can be easily removed from the annular groove and pulled toward the rear end portion. The diameter of the needle becomes smaller, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion.
Further, since a linear groove is formed in the inner wall of the hollow needle portion from the rear end side of the injection needle-shaped opening to the rear end side of the hollow needle portion, the wire can be arranged in this groove. Moreover, when viewed from the opening side of the hollow cylindrical needle portion, no wire is allowed to protrude from the inner wall side of the hollow needle portion. An additional effect of becoming good will also be exhibited. Also, when pulling both ends of the wire, the diameter of the loop of the wire becomes smaller as the U-shaped through hole serves as a fulcrum, so that the living tissue that has entered the hollow needle along the annular groove is removed. You will be able to cut efficiently.

In addition, the biopsy needle of the fifth aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed from the front end side of the opening wall of the injection needle-shaped opening to the outside of the hollow needle portion. Either the wire extends to the rear end side of a hollow needle and is operably provided from the rear end side of the hollow needle , or the wire has an intermediate portion removably fitted within the annular groove. One end is fixed in the annular groove in the vicinity of the front end side of the opening wall of the injection needle-shaped opening, and the other end is the front end side of the opening wall of the injection needle-shaped opening. through the outside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion,
A through hole is provided between the annular groove on the front end side of the injection needle-shaped opening and the interior of the hollow needle,
The wire is characterized in that it extends to the rear end side of the hollow needle through the through-hole and the outside of the hollow needle .

According to the biopsy needle of the fifth aspect, since the wire is detachably fitted and fixed in the annular groove formed on the surface of the opening wall of the injection needle-shaped opening, the wire is shaped like an injection needle. It becomes difficult to protrude from the opening wall of the opening. As a result, when the biopsy needle of the fifth aspect is punctured into a biological tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the biological tissue piece introduced into the hollow needle portion can be increased. become able to. In addition, according to the biopsy needle of the fifth aspect, both ends of the wire are passed through a through-hole that communicates between the tip side of the opening wall of the injection needle-shaped opening and the inner wall or the outer wall. Both ends of the wire extending to the rear end side of the hollow needle portion after piercing the living tissue with the biopsy needle of the fifth aspect By pulling (pulling) the side of the wire, the wire is easily removed from the annular groove and the diameter of the ring becomes smaller toward the distal end, so that the living tissue located in the injection needle-shaped opening can be cut. A large number of pieces of body tissue can be collected into the hollow needle portion.
In addition, in the biopsy needle of the fifth aspect, one end of the wire is fixed in the annular groove in the vicinity of the tip side of the opening wall of the needle-shaped opening, and the other end is the needle-shaped opening. Since it extends from the front end side of the opening wall of the opening to the rear end side inside or outside the hollow needle portion through the through hole that communicates with the outer wall or the inner wall, After piercing the living tissue with the biopsy needle, by pulling (pulling) the single wire extending to the rear end side of the hollow needle portion, the wire is easily removed from the annular groove and directed toward the distal end portion. As a result, the diameter of the ring becomes smaller, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion.
Once the wire is passed through the through-hole, it is only necessary to arrange it along the outer wall of the hollow cylindrical needle portion, which facilitates assembly, and has substantially the same effects as the biopsy needle of the first aspect. can be played. That is, after the biopsy needle of the fifth aspect is pierced into the living tissue and the living tissue enters the hollow cylindrical needle portion of the biopsy needle, both ends of the wire are pulled at the same time or while being finely reciprocated. As a result, the loop gradually detaches from the annular groove of the injection needle-shaped opening, and the diameter of the loop becomes smaller toward the distal end side opposite to the case of the biopsy needle of the first aspect, and the injection needle shape is accompanied by this. The deep part of the living tissue is cut along the annular groove of the opening of the . When the wire loop reaches the through hole and closes, substantially all of the living tissue located in the injection needle-shaped opening is cut.

Furthermore, the biopsy needle of the sixth aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed in the inner wall of the hollow needle,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed from the front end side of the opening wall of the injection needle-shaped opening to the inside of the hollow needle portion. Either the wire extends to the rear end side of a hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has a middle portion removably within the annular groove. Fitted and fixed, one end is fixed in the annular groove in the vicinity of the front end side of the opening wall of the needle-shaped opening, and the other end is the front end of the opening wall of the needle-shaped opening. is provided so as to pass through the inside of the hollow needle portion from the side and extend to the rear end side of the hollow needle portion so as to be operable from the rear end side of the hollow needle portion,
A U-shaped or J-shaped through-hole is formed between the annular groove and the inner wall of the hollow needle portion on the front end side of the injection needle-shaped opening, and the wire It is characterized by extending to the rear end side of the hollow needle through the through-hole and the inside of the hollow needle .

According to the biopsy needle of the sixth aspect, the wire is detachably fitted and fixed in the annular groove formed in the inner wall of the hollow needle portion, so that the wire has an injection needle-shaped opening. It becomes difficult to protrude from the opening wall. As a result, when the biopsy needle of the sixth aspect is punctured into a biological tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the biological tissue piece introduced into the hollow needle portion can be increased. become able to. In addition, according to the biopsy needle of the sixth aspect, both ends of the wire are passed through a through-hole that communicates between the tip side of the opening wall of the injection needle-shaped opening and the inner wall or the outer wall. Both ends of the wire extending to the rear end side of the hollow needle portion after the biopsy needle of the sixth aspect is pierced into the biological tissue By pulling (pulling) the side of the wire, the wire is easily removed from the annular groove and the diameter of the ring becomes smaller toward the distal end, so that the living tissue located in the injection needle-shaped opening can be cut. A large number of pieces of body tissue can be collected into the hollow needle portion.
In addition, in the biopsy needle of the sixth aspect, one end of the wire is fixed in the annular groove in the vicinity of the tip side of the opening wall of the needle-shaped opening, and the other end is fixed to the needle-shaped opening. Since it extends from the front end side of the opening wall of the opening to the rear end side inside or outside the hollow needle portion through the through hole that communicates with the outer wall or the inner wall, the sixth aspect is achieved. After piercing the living tissue with the biopsy needle, by pulling (pulling) the single wire extending to the rear end side of the hollow needle portion, the wire is easily removed from the annular groove and directed toward the distal end portion. As a result, the diameter of the ring becomes smaller, so that the living tissue located in the injection needle-shaped opening can be cut, and many pieces of living tissue can be collected into the hollow needle portion.
In addition, when both ends of the wire are towed from the operating portion side, the loop of the wire becomes smaller from the rear end side to the tip side. With such a biopsy needle, it is also possible to efficiently cut the living tissue that has entered the interior of the hollow needle portion. In addition, even when manipulating a single wire, it is possible to efficiently cut the living tissue that has entered the interior of the hollow needle.

In addition, the biopsy needle of the seventh aspect of the present invention is
a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed from the front end side of the opening wall of the injection needle-shaped opening to the inside of the hollow needle portion. Either the wire extends to the rear end side of a hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has a middle portion removably within the annular groove. Fitted and fixed, one end is fixed in the annular groove in the vicinity of the front end side of the opening wall of the needle-shaped opening, and the other end is the front end of the opening wall of the needle-shaped opening. is provided so as to pass through the inside of the hollow needle portion from the side and extend to the rear end side of the hollow needle portion so as to be operable from the rear end side of the hollow needle portion,
A U-shaped or J-shaped through-hole is formed between the annular groove and the inner wall of the hollow needle portion on the front end side of the injection needle-shaped opening, and the wire It is characterized by extending to the rear end side of the hollow needle through the through-hole and the inside of the hollow needle .

According to the biopsy needle of the seventh aspect, since the wire is detachably fitted and fixed in the annular groove formed on the surface of the opening wall of the injection needle-shaped opening, the wire is shaped like an injection needle. It becomes difficult to protrude from the opening wall of the opening. As a result, when the biopsy needle of the seventh aspect is punctured into a biological tissue, the resistance is reduced, so that the puncture becomes easier and the amount of the biological tissue piece introduced into the hollow needle portion can be increased. become able to. In addition, according to the biopsy needle of the seventh aspect, both end sides of the wire are passed through a through-hole that communicates between the tip end side of the opening wall of the injection needle-shaped opening and the outer wall or the inner wall. Both ends of the wire extending to the rear end side of the hollow needle portion after the biopsy needle of the seventh aspect is pierced into the biological tissue By pulling (pulling) the side of the wire, the wire is easily removed from the annular groove and the diameter of the ring becomes smaller toward the distal end, so that the living tissue located in the injection needle-shaped opening can be cut. A large number of pieces of body tissue can be collected into the hollow needle portion.
In addition, in the biopsy needle of the seventh aspect, one end of the wire is fixed in the annular groove near the tip side of the opening wall of the needle-shaped opening, and the other end is the needle-shaped opening. Since it extends from the front end side of the opening wall of the opening to the rear end side inside or outside the hollow needle portion through the through hole that communicates with the outer wall or the inner wall, After the biopsy needle is pierced into the living tissue, by pulling (pulling) the single wire extending to the rear end side of the hollow needle portion, the wire is easily removed from the annular groove and directed toward the distal end portion. As a result, the diameter of the ring becomes smaller, the body tissue located in the injection needle-shaped opening can be cut, and many pieces of body tissue can be collected into the hollow needle portion.
Also, as with the biopsy needle of the sixth aspect, when both ends of the wire are pulled from the operating portion side, the loop of the wire becomes smaller from the rear end side toward the tip side. With such a biopsy needle, it is also possible to efficiently cut the living tissue that has entered the interior of the hollow needle portion. Moreover, even when manipulating a single wire, it is possible to efficiently cut the living tissue that has entered the interior of the hollow needle portion.

The biopsy needle of the eighth aspect of the present invention is the biopsy needle of any one of the first to seventh aspects, wherein the wire is substantially flush with the wall surface on which the annular groove is formed. It is fitted and secured within said annular groove so as to form a groove.

According to the biopsy needle of the eighth aspect, since the wire is fitted and fixed so as to form substantially the same plane as the wall surface on which the annular groove is formed, the biopsy needle can be pierced into the biological tissue. resistance becomes less. In addition, the term "substantially the same plane" in the present invention is desirably completely the same plane. Since it is difficult to make the surface of the wall or the inner wall of the hollow needle part flush with it, it is used to indicate that there may be a portion that is partially recessed as long as it does not protrude from the annular groove. there is

Further, the biopsy needle of the ninth aspect of the present invention is the biopsy needle of any one of the first to eighth aspects, wherein the wire is fixed in the annular groove with an easily peelable adhesive. characterized by

According to the biopsy needle of the ninth aspect, when the biopsy needle is punctured into the living tissue, the wire is less likely to come off the annular groove, and the wire extends to the rear end side of the hollow needle portion. By manipulating the end of the wire, the wire can be easily removed from the annular groove to cut the living tissue located in the hypodermic needle-shaped opening.

As described above, according to the biopsy needle of the present invention, the biopsy needle has low puncture resistance, the wire is difficult to be removed from the biopsy needle at the time of puncture, and the biopsy needle can be easily cut by the wire. Meter reading.

FIG. 1A is a perspective view of a state in which an ultrasound endoscope for use in EUS-FNA and a biopsy needle of the present invention are combined, and FIG. 1B is a state in which EUS-FNA is applied to a submucosal tumor. FIG. 1C is a schematic diagram, and FIG. 1C is a schematic diagram when EUS-FNA is applied to a pancreatic tumor. 2A is a plan view of the biopsy needle of Embodiment 1, and FIG. 2A is a longitudinal sectional view of FIG. 1. FIG. 3C is a plan view of the first modification of the biopsy needle of Embodiment 1, and FIG. 3D is a plan view of the second modification. 4A is a plan view of the biopsy needle of Embodiment 2, and FIG. 4B is a vertical cross-sectional view of FIG. 4A. 5A is a plan view of the biopsy needle of Embodiment 3, FIG. 5B is a longitudinal sectional view of FIG. 5A, and FIG. 5C is a VC-VC sectional view of FIG. 5B. 6A is a plan view of the biopsy needle of Embodiment 4, and FIG. 6B is a vertical cross-sectional view of FIG. 6A. 7A is a plan view of the biopsy needle of Embodiment 5, and FIG. 7B is a vertical cross-sectional view of FIG. 7A. 8A is a plan view of the biopsy needle of Embodiment 6, FIG. 8B is a vertical cross-sectional view of FIG. 8A, and FIG. 8C is a cross-sectional view taken along line VIIIC-VIIIC of FIG. 8B. 9A is a plan view of the biopsy needle of Embodiment 7, and FIG. 9B is a plan view of the biopsy needle of Embodiment 8. FIG. 10A is a plan view of the biopsy needle of Embodiment 9, and FIG. 10B is a vertical cross-sectional view of FIG. 10A. 11a is a plan view of the biopsy needle of embodiment 10, and FIG. 11B is a longitudinal cross-sectional view of FIG. 11a. 12A is a plan view of the biopsy needle of Embodiment 11, and FIG. 12B is a longitudinal cross-sectional view of FIG. 12A. 13A is a plan view of the biopsy needle of Embodiment 12, and FIG. 13B is a longitudinal cross-sectional view of FIG. 13A. 14A is a plan view of the biopsy needle of Embodiment 13, and FIG. 14B is a longitudinal cross-sectional view of FIG. 14A. 15A is a plan view of a conventional biopsy needle, and FIG. 15B is a partial longitudinal sectional view of FIG. 15A.

The biopsy needle of the present invention will now be described in detail with reference to various embodiments. However, the embodiments shown below are examples of biopsy needles for embodying the technical idea of the present invention, and are not intended to limit the present invention to these embodiments. The present invention can equally be applied to various modifications without departing from the technical idea shown in the claims. It should be noted that each drawing used for explanation in this specification schematically shows a schematic configuration, and therefore each member is not necessarily shown in proportion to the actual size.

First, an example in which the biopsy needle of the present invention is applied to an ultrasonic endoscope apparatus for use in EUS-FNA will be described with reference to FIG. The ultrasonic endoscope apparatus 1 has an ultrasonic probe 2 on the distal end side, and various operation units, a display unit, etc., although not shown, on the rear end side. The image data picked up by the ultrasonic probe 2 is displayed on the display section or the like. Since the optical endoscope apparatus displays an image captured by an optical imaging sensor, it has high resolution and is suitable for observing the surface of living tissue, but cannot observe in the depth direction. On the other hand, although the resolution of the ultrasonic endoscope is inferior to that of the optical endoscope device, the ultrasonic endoscope is suitable for observation of the deep part of living tissue because it enables observation in the depth direction.

This ultrasonic endoscope apparatus 1 is provided with a forceps port 3 , a biopsy needle 10 is inserted through a sheath 4 from the operating portion side, and the biopsy needle 10 extends to a position facing the ultrasonic probe 2 . exist. A biopsy needle deflection means 5 is provided in the vicinity of the forceps port 3 of the ultrasonic endoscope apparatus 1 . The angle between them can be changed as appropriate. The biopsy needle 10 is made of hard plastic and extends to the operation section side. The projection length of the biopsy needle 10 on the distal end side of the ultrasonic endoscope apparatus 1 can be arbitrarily adjusted on the operating section side.

The figure shows a state in which a piece of tumor tissue is collected from, for example, the submucosal tumor tissue 6c existing between the mucosal layer 6a and the submucosal layer 6b of the stomach 6 using the ultrasonic endoscope apparatus 1 configured as described above. 1B. Initially, with the biopsy needle 10 housed in the ultrasonic endoscope apparatus 1, the ultrasonic probe 2 is placed opposite to the position where the submucosal tumor tissue 6c to be sampled exists in the stomach 6 while observing the image. , the ultrasonic endoscope apparatus 1 is inserted. Next, by operating the operation section, the biopsy needle 10 is pushed out and deviated appropriately, and the tip of the biopsy needle 10 punctures the submucosal tumor tissue 6c until it reaches a predetermined position.

Next, a portion of the submucosal tumor tissue 6c is accommodated in the biopsy needle 10 by applying a negative pressure to the inside of the biopsy needle 10, and a predetermined cutting means is operated to cut the tumor tissue located near the tip of the biopsy needle 10. is cut and a piece of tumor tissue is collected in the biopsy needle 10 . Thereafter, by removing the biopsy needle 10 itself from the ultrasonic endoscope apparatus 1, a predetermined piece of tumor tissue can be recovered. The tumor tissue piece collected in this manner is sent to the biopsy department, where cytodiagnosis is performed as appropriate. In the case of such a submucosal tumor, since it is possible to clearly observe it with an optical endoscope, it is possible to combine a biopsy needle with an optical endoscope.

However, as shown in FIG. 1C, for example, detecting a pancreatic tumor 8 generated inside the pancreas 7 by an optical endoscope device inserted into the duodenum 9, and collecting the tissue of the pancreatic tumor 8 is a diseased part. cannot be detected from the side of the duodenum 9 through the muscular layer 9c, submucosal layer 9b and mucosal layer 9a of the duodenum. On the other hand, according to the ultrasonic endoscope apparatus 1, it is possible to detect the position and size of the pancreatic tumor 8 from the mucosal layer 9a side of the duodenum 9. can be punctured and a piece of tissue of a given pancreatic tumor 8 can be collected.

[Embodiment 1]
A biopsy needle 10 of Embodiment 1 will be described with reference to FIG. 2A is a plan view of the biopsy needle of Embodiment 1, and FIG. 2A is a longitudinal sectional view of FIG.

A biopsy needle 10 of Embodiment 1 has an injection needle-shaped opening 12 with an obliquely cut end at one end of a hollow cylindrical needle portion 11 . An annular groove 14 is formed substantially in the center of the opening wall 13 of the needle-shaped opening 12 . The depth of this annular groove 14 is the same as or slightly deeper than the diameter of a wire 15 to be described later, so that the wire 15 does not protrude beyond the opening wall 13 . Also, the width of the annular groove 14 is the same as or slightly larger than the diameter of the wire 15 .

On the rear end side of the opening wall 13 of the injection needle-shaped opening 12 , a short groove 16 with a width of two wires 15 and the same or slightly deeper than the diameter of the wire 15 is formed at the rear end of the annular groove 14 . formed to connect with the side. A straight groove 17 having the same depth and width as the short groove 16 is formed on the side surface of the hollow cylindrical needle portion 11 . extends to the rear end (not shown) of the . That is, the annular groove 14, the short groove 16 and the linear groove 17 have the same depth, and the short groove 16 and the linear groove 17 have the same width and are all connected.

An intermediate portion of the wire 15 is fitted in the annular groove 14 in a loop shape, and both ends of the wire 15 are merged with each other, pass through a short groove 16 and a linear groove 17, and pass through a superficial groove (not shown). It extends to the operating section of the sonic endoscope apparatus and is taken out from the operating section. As the wire 15, a thin, flexible, yet high-strength material such as nylon thread, silk, stainless steel, titanium or carbon fiber thread, protein-made synthetic spider thread, etc., is appropriately selected. can be used At least the wire 15 fitted in the annular groove 14 is fixed in the annular groove 14 by an easily peelable adhesive (not shown). This wire 15 corresponds to the cutting means of the present invention.

As for the easily peelable adhesive, when the biopsy needle 10 is pierced into the tissue, the wire 15 does not peel off from the annular groove 14 of the injection needle-shaped opening 12, and when the wire 15 is pulled from both ends, Any material may be used as long as it has adhesiveness to the extent that the wire 15 is detached from the annular groove 14 of the injection needle-shaped opening 12 and has good biocompatibility. mentioned.

A method of using this biopsy needle 10 is as follows. First, as shown in FIGS. 1B to 1C, the ultrasonic endoscope device 1 is inserted to a predetermined position. An inner needle (not shown) without an opening is inserted into the hollow cylindrical needle portion 11 of the biopsy needle 10 so that biological tissue does not enter the injection needle-shaped opening 12 of the biopsy needle 10 . The biopsy needle 10 and the inner needle in this state are simultaneously pierced into the living tissue so as to be positioned near the target site. Thereafter, the biopsy needle 10 is further inserted to the target site while the inner needle is fixed, or the biopsy needle 10 is further inserted to the target site after the inner needle is slightly pulled. Then, the living tissue enters the hollow cylindrical needle portion 11 of the biopsy needle 10 .

In this state, of the living tissue that has entered hollow cylindrical needle portion 11 of biopsy needle 10, the side surface that is in contact with inner wall 11a of hollow cylindrical needle portion 11 of biopsy needle 10 is cut. , the living tissue located on the injection needle-shaped opening 12 side is not cut. When the biopsy needle 10 is pulled out together with the inner needle in this state, the inside of the hollow cylindrical needle portion 11 becomes negative pressure, causing the deep part of the living tissue to be torn off into the hollow cylindrical needle portion 11 . Although it may remain, most of it escapes from the hollow cylindrical needle part 11, so the recovery rate of the living tissue is low.

Therefore, in the biopsy needle 10 of Embodiment 1, after the living tissue has entered the hollow cylindrical needle portion 11 of the biopsy needle 10, both ends of the wire 15 are pulled simultaneously or while being finely reciprocated. . Then, as the wire 15 is pulled toward the other end side, the wire 15 is gradually separated from the annular groove 14 of the needle-shaped opening 12 and the diameter of the loop becomes smaller. A deep portion of the living tissue is cut along the groove 14 . When the loop of the wire 15 is closed, substantially all of the living tissue located in the injection needle-shaped opening 12 is cut.

In this state, when the biopsy needle 10 is pulled out together with the inner needle, since the living tissue has been cut, the collected piece of living tissue can be taken out while remaining in the hollow cylindrical needle portion 11. High recovery of tissue fragments. When the biopsy needle 10 is pulled out together with the inner needle, if the inner needle is pulled out first and then a syringe is attached to apply suction, the inside of the hollow cylindrical needle portion 11 will be negatively pressured, so that the tissue fragment will be removed. is located on the far side of the hollow cylindrical needle portion 11, and the recovery rate of the living tissue fragment is improved. At that time, the strength of the negative pressure can be adjusted by the capacity of the syringe to be pulled, but since the biopsy needle 10 of the first embodiment cuts the living tissue, the tissue can be recovered with a weaker negative pressure than in the conventional method. be possible. Therefore, the probability that the living tissue will be divided into pieces is also reduced.

The biopsy needle 10 of Embodiment 1 may be used alone by being connected to a known syringe as it is, or may be used in combination with not only an ultrasonic endoscope device but also an optical endoscope device. is. When the biopsy needle 10 of Embodiment 1 is used in combination with not only an ultrasonic endoscope device but also an optical endoscope device, each operation part and the injection needle-shaped opening 12 of the biopsy needle 10 Although the length becomes very long, even in such a state, if the wire 15 is pulled from the operation part side after the biopsy needle 10 is pierced to the target site of the living tissue, the injection needle-shaped opening 12 can be pulled. It becomes possible to easily cut the living tissue located in the . In particular, since both ends of the wire 15 extend to the operating portion, the wire 15 can be operated like a saw by finely reciprocating the both ends of the wire 15 in different directions. Easy to cut.

Moreover, in Embodiment 1, the example which combined and used the biopsy needle 10 and an inner needle was shown. When such a configuration is adopted, it becomes difficult for the injection needle-shaped opening 12 of the biopsy needle 10 to enter the hollow cylindrical needle portion 11 of the biopsy needle 10 until it reaches a desired depth. A piece of living tissue can be easily collected. When collecting a piece of body tissue from the surface, the biopsy needle 10 may be used alone without using the inner needle. can be exerted, the collection efficiency of the biological tissue piece is improved.

In the biopsy needle 10 of Embodiment 1, an example is shown in which a short groove 16 is formed on the rear end side of the opening wall 13 of the hypodermic needle-shaped opening 12 so as to be connected to the rear end side of the annular groove 14 . However, this short groove 16 is not necessarily required for operation of the biopsy needle 10 . However, without the short groove 16, the portion of the needle-shaped opening 12 where the wire 15 crosses the rear end side of the opening wall 13 protrudes from the surface of the opening wall 13, resulting in large resistance when the biopsy needle 10 is punctured. or the wire 15 may be displaced. On the other hand, when the short groove 16 is provided, the wire 15 does not protrude from the surface of the opening wall 13 at the portion where the injection needle-shaped opening 12 crosses the rear end side of the opening wall 13, and the biopsy needle 10 punctures. Since the resistance is reduced and both ends of the wire 15 are fitted and fixed in the short grooves 16, the wire 15 is prevented from slipping when the biopsy needle 10 is punctured.

In the biopsy needle 10 of Embodiment 1, an example is shown in which the straight groove 17 having the same depth and width as the short groove 16 is formed on the side surface of the hollow cylindrical needle portion 11. Groove 17 is also not necessarily required for operation of biopsy needle 10 . However, if such a linear groove 17 is provided, both ends of the wire 15 can be prevented from protruding from the side surface of the hollow cylindrical needle portion 11, so that the biopsy needle 10 can be inserted into the forceps port of the endoscope device. The resistance is reduced when inserting it, and it can be inserted smoothly. The wire 15 arranged in the linear groove 17 should be fitted to the extent that it can be easily slid in the linear groove 17 .

Furthermore, as the biopsy needle 10 of the first embodiment, an example in which the injection needle-shaped opening 12 of the hollow cylindrical needle portion 11 is linear as shown in FIG. 2B is used. However, it is not limited to this, and a so-called Menghini shape that is concave when viewed from the side can also be used. When using such a Menghini-shaped object, the resistance at the time of puncture becomes smaller than that of an object having an essentially linear shape when viewed from the side, so that it is possible to collect a biological tissue piece more satisfactorily. become. It should be noted that the shape of the injection needle-shaped opening 12 of the hollow cylindrical needle portion 11 is Menghini-shaped, which is also adopted in Modifications 1 and 2 and Embodiments 2 to 13 shown below. be able to.

[Modifications 1 and 2]
Here, a modification of the biopsy needle 10 of Embodiment 1 will be described with reference to FIG. Note that FIG. 3A is a plan view of the first modification of the biopsy needle of Embodiment 1, and FIG. 3B is a plan view of the second modification. Moreover, in FIGS. 3A and 3B, the same reference numerals are given to the same components as those of the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B, and detailed description thereof will be omitted.

In the biopsy needle 10 of Embodiment 1, an example is shown in which the annular groove 14 is formed substantially in the center of the opening wall 13 of the injection needle-shaped opening 12, but the biopsy needle 10A of Modification 1 is shown in FIG. 3A. As described above, the annular groove 14 is formed in the outer wall of the opening wall 13 of the needle-shaped opening 12 . Similarly, a biopsy needle 10B of Modification 2 has an annular groove 14 formed on the inner peripheral side of an opening wall 13 of an injection needle-shaped opening 12, as shown in FIG. 3B. The biopsy needles 10A and 10B of both modified examples 1 and 2 have substantially the same actions and effects as the biopsy needle of the first embodiment.

[Embodiment 2]
A biopsy needle 10C of Embodiment 2 will be described with reference to FIG. 4A is a plan view of the biopsy needle 10C of Embodiment 2, and FIG. 4B is a vertical sectional view of FIG. 4A. Moreover, in FIGS. 4A and 4B, the same constituent parts as those of the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the biopsy needle 10 of Embodiment 1, an example in which the annular groove 14 is formed in the substantially central portion of the opening wall 13 of the injection needle-shaped opening 12 is shown, but the biopsy needle 10C of Embodiment 2 has an annular groove 14C. is formed on the inner wall 11a of the hollow cylindrical needle portion 11 of the biopsy needle 10C. The distal end portion 14a of the annular groove 14C is provided from a point slightly inside from the tip side 12a of the needle-shaped opening 12 to a point corresponding to the rear end side 12b of the needle-shaped opening 12. there is

The short groove 16a in this case is formed so as to cross the rear end side of the opening wall 13 of the needle-shaped opening 12 . According to the biopsy needle 10C of Embodiment 2 having such a configuration, when viewed from the opening 12 side of the hollow cylindrical needle portion 11, the wire 15 protrudes toward the inner wall 11a of the hollow cylindrical needle portion 11. In addition, since the opening wall 13 of the hypodermic needle-shaped opening 12 has no structure other than the short groove 16a, insertion resistance at the time of puncture is reduced, and the collection efficiency of the biological tissue fragment is improved. .

In addition, in the biopsy needle 10C of the second embodiment, an example is shown in which the linear groove 17 having the same depth and width as the short groove 16 is formed on the side surface of the hollow cylindrical needle portion 11. As in the case of biopsy needle 10, this linear groove 17 is not a necessary configuration for the operation of biopsy needle 10C.

[Embodiment 3]
A biopsy needle 10D of Embodiment 3 will be described with reference to FIG. 5A is a plan view of the biopsy needle of Embodiment 3, FIG. 5B is a vertical cross-sectional view of FIG. 5A, and FIG. 5C is a cross-sectional view taken along line VC-VC of FIG. 5B. 5A to 5C, the same components as those of the biopsy needle 10C of Embodiment 2 shown in FIGS. 4A and 4B are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the biopsy needle 10C of Embodiment 2, an annular groove 14C is provided from a point slightly inside from the distal end side 12a of the injection needle-shaped opening 12 to a point corresponding to the rear end side 12b of the injection needle-shaped opening 12. However, in the biopsy needle 10D of Embodiment 3, the annular groove 14C is slightly inside from the distal end side 12a of the injection needle-shaped opening 12 and slightly from the rear end side of the injection needle-shaped opening 12. It is set up to the point where you enter. In the biopsy needle 10D of Embodiment 3, the outer wall of the hollow needle portion 11 is not provided with the short grooves 16 and the linear grooves 17, and the inner wall 11a of the hollow needle portion 11 is provided with an injection needle-like shape. A U-shaped or J-shaped (hereinafter sometimes simply referred to as "U-shaped") through-hole 17b having a diameter slightly larger than that of the wire 15 is provided at a location slightly inside the opening 12 from the rear end side. Further, a groove 17a is formed in the inner wall 11a of the hollow needle portion 11 so as to connect to the U-shaped through hole 17b and extend to the rear end side of the hollow needle portion 11. As shown in FIG.

Although the through hole 17b can be regarded as linear when viewed from the annular groove 14C side, it is intentionally expressed as a U-shape or a J-shape here as viewed from the description of FIG. 5B. Further, instead of the U-shaped or J-shaped through hole 17b, a first through hole is formed from the annular groove 14C toward the outer wall of the hollow cylindrical needle portion 11, and furthermore, a first through hole is formed from the outer wall to the inside. A second through-hole is formed toward the wall 11a, and the wire 15 is led out from the annular groove 14C through the first through-hole to the outer wall side, and further from the outer wall side through the second through-hole into a hollow cylindrical shape. It is also possible to reach the inner wall 11a side of the needle portion 11 of . However, such a configuration increases the frictional resistance of the wire 15, so it is preferable to prevent the wire 15 from being exposed on the outer wall side.

One end of this U-shaped through hole 17b is opened to the inner wall 11a side of the hollow needle portion 11, passes through the inside of the wall of the hollow needle portion 11, and the other end is as described above. The hollow needle portion 11 is opened to the inner wall 11a side at a different position on the rear end side from the one end portion. The wire 15 has its intermediate portion fitted and fixed in the annular groove 14C, both ends aligned and passed through the U-shaped through hole 17b, and then formed on the inner wall of the hollow needle portion 11. It is fitted and fixed in the groove 17 a and extends to the rear end side of the hollow needle portion 11 .

The inner diameter of the hollow needle portion 11 is small, and an inner needle is inserted into the hollow needle portion 11 when the biopsy needle 10D is used. , the friction between the wire and the inner surface of the hollow needle portion and the outer surface of the inner needle usually increases, and the operability of the wire deteriorates. On the other hand, according to the biopsy needle 10D of Embodiment 3, a linear groove is formed in the inner wall 11a of the hollow needle portion 11 from the rear end side 12b of the injection needle-shaped opening 12 to the rear end side of the hollow needle portion 11. Since the groove 17a is formed, the wire 15 can be arranged in the groove 17a. Since it is possible to prevent the wire 15 from protruding at all, there is an additional effect that the friction of the wire 15 is reduced and the operability is improved. Also, when pulling both ends of the wire 15, the diameter of the loop of the wire 15 becomes smaller as the U-shaped through-hole serves as a fulcrum. It becomes possible to efficiently cut the living tissue that has entered.

In addition, in the biopsy needle 10D of Embodiment 3, when the linear groove 17a is not formed in the inner wall 11a of the hollow needle portion 11, if the linear groove is formed in the outer wall of the inner needle (not shown), The same effect as in the case where the linear groove 17a is formed in the inner wall 11a of the substantially hollow needle portion 11 can be obtained.

[Embodiment 4]
A biopsy needle 10E of Embodiment 4 will be described with reference to FIG. 6A is a plan view of the biopsy needle of Embodiment 4, and FIG. 6B is a longitudinal sectional view of FIG. 6A. In addition, in FIGS. 6A and 6B, the same reference numerals are assigned to the same components as the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B, and detailed description thereof will be omitted.

In the biopsy needle 10E of Embodiment 4, the substantially straight groove 17 is eliminated from the biopsy needle 10 of Embodiment 1, and a hollow is formed near the place where the short groove 16 intersects the side surface of the hollow cylindrical needle portion 11. A through hole 18 is formed through the side wall of the needle portion 11, and both ends of the wire 15 are immediately inserted through the through hole 18 through the short groove 16, and along the inner wall 11a of the hollow cylindrical needle portion 11, The point is that it extends to the operation part.

According to the biopsy needle 10E of Embodiment 4 having such a configuration, both ends of the wire 15 do not substantially pass through the side surfaces of the hollow cylindrical needle portion 11, and the biopsy needle 10E penetrates the living tissue. Occasionally, since the inner needle is inserted as described above, both ends of the wire 15 are held between the inner needle and the inner wall 11a of the hollow cylindrical needle portion 11, so that the wire 15 is stable. maintained as is. As a result, the insertion resistance at the time of puncture is reduced, and the collection efficiency of the biological tissue piece is improved.

Also in the biopsy needle 10E of the fourth embodiment, although not shown in the drawings, as in the case of the biopsy needle 10D of the third embodiment, the inner wall 11a of the hollow needle portion 11 has an injection needle-shaped opening 12 on the rear end side thereof. to the rear end side of the hollow needle portion 11, and both end sides of the wire 15 extending from the annular groove 14C are inserted into the grooves 17a formed in the inner wall of the hollow needle portion 11, respectively. It is also possible to employ a configuration in which the hollow needle portion 11 is fitted and fixed to extend to the rear end side of the hollow needle portion 11 . In this case also, when viewed from the opening 12 side of the hollow cylindrical needle portion 11, the wire 15 does not protrude toward the inner wall 11a of the hollow cylindrical needle portion 11. operability is improved.

[Embodiment 5]
A biopsy needle 10F of Embodiment 5 will be described with reference to FIG. 7A is a plan view of the biopsy needle of Embodiment 5, and FIG. 7B is a longitudinal sectional view of FIG. 7A. In addition, in FIGS. 7A and 7B, the same reference numerals are assigned to the same components as the biopsy needle 10 of Embodiment 1 shown in FIGS. 2A and 2B, and detailed description thereof will be omitted.

The configuration of the biopsy needle 10F of Embodiment 5 is different from that of the biopsy needle 10 of Embodiment 1 in that the linear groove 17 of the biopsy needle 10 of Embodiment 1 is not provided, and both ends of the wire 15 of the annular groove 14 are A through-hole 19 communicating with the interior of the hollow cylindrical needle portion 11 is formed at the confluence point, and both ends of the wire 15 are directly inserted into the through-hole 19 to be inserted into the inner wall 11a of the hollow cylindrical needle portion 11 . It is a point extended to the operation part along.

According to the biopsy needle 10F of Embodiment 5 having such a configuration, both end sides of the wire 15 do not substantially pass through the outer surface of the hollow cylindrical needle portion 11, and the biopsy needle 10F does not reach the living tissue. At the time of puncture, the inner needle is inserted as described above. Therefore, as in the case of the biopsy needle 10 of Embodiment 1, both ends of the wire 15 are connected to the inner wall 11a of the hollow cylindrical needle portion 11 by the inner needle. It is held in a stable state because it is sandwiched between the As a result, the insertion resistance at the time of puncture is reduced, and the collection efficiency of the biological tissue piece is improved.

[Embodiment 6]
A biopsy needle 10G of Embodiment 6 will be described with reference to FIG. 8A is a plan view of the biopsy needle of Embodiment 6, FIG. 8B is a vertical cross-sectional view of FIG. 8A, and FIG. 8C is a cross-sectional view taken along line VIIIC-VIIIC of FIG. 8B. Further, in FIGS. 8A to 8C, the same constituent parts as those of the biopsy needle 10F of Embodiment 5 shown in FIGS. 7A and 7B are given the same reference numerals, and detailed description thereof will be omitted.

In the biopsy needle 10F of Embodiment 5, a through hole 19 communicating with the inside of the hollow cylindrical needle portion 11 is formed at the point where both ends of the wire 15 of the annular groove 14 meet, and both ends of the wire 15 are directly connected. It is inserted through the through-hole 19 and extended to the operation part along the inner wall 11a of the hollow cylindrical needle part 11. In the biopsy needle 10G of Embodiment 6, the inner wall 11a of the hollow needle part 11 is A linear groove 17a is formed from the through hole 19 to the rear end side of the hollow needle portion 11, and both end sides of the wire 15 extending from the annular groove 14 are formed on the inner wall of the hollow needle portion 11, respectively. It is fitted and fixed in the linear groove 17a provided and extends to the rear end side of the hollow needle portion 11. As shown in FIG.

According to the biopsy needle 10F of Embodiment 6 having such a configuration, the inner wall 11a of the hollow needle portion 11 is grooved from the rear end side 12b of the injection needle-shaped opening 12 to the rear end side of the hollow needle portion 11. Since the groove 17a is formed, the wire 15 can be arranged in the groove 17a. Since the wire 15 can be prevented from projecting at all, in addition to the effect of the biopsy needle 10F of the fifth embodiment, there is an additional effect that the friction of the wire 15 is reduced and the operability is improved. become.

[Embodiments 7 and 8]
Biopsy needles 10H and 10I of embodiments 7 and 8 are described with reference to FIGS. 9A and 9B, respectively. 9A is a plan view of the biopsy needle of Embodiment 7, and FIG. 9B is a plan view of the biopsy needle of Embodiment 8. FIG.

The biopsy needle 10H of the seventh embodiment differs in configuration from the biopsy needle 10 of the first embodiment in that the intermediate portion of the wire 15 is fitted in the annular groove 14 in a loop shape. Both ends of the wire 15 are merged and extend to the rear end side of the hollow needle portion 11 through the short groove 16 and the linear groove 17, whereas the wire 15 of Embodiment 7 In the needle detector 10H, one end of the wire 15 is fixed by an adhesive 20 in the annular groove 14 near the short groove 16, and only the other side of the wire 15 has the short groove 16 and the linear groove 17. It extends to the rear end side of the hollow needle portion 11 through the needle portion 11 .

The biopsy needle 10I of the eighth embodiment differs from the biopsy needle 10F of the fifth embodiment in that, in the biopsy needle 10F of the fifth embodiment, the intermediate portion of the wire 15 is fitted in the annular groove 14 in a loop shape. Both ends of the wire 15 are directly inserted through the through-holes 19 and extended along the inner wall 11a of the hollow cylindrical needle portion 11 to the operation portion. In the biopsy needle 10I, one end of the wire 15 is fixed in the annular groove 14 near the through hole 19 by the adhesive 20, and only the other side of the wire 15 is through the through hole 19 and the hollow needle portion 11 , and extends to the rear end side of the hollow needle portion 11 .

According to the biopsy needle 10H of the seventh embodiment and the biopsy needle 10I of the eighth embodiment, both of which are configured as described above cut the living tissue located in the injection needle-shaped opening simply by operating one wire 15. Therefore, the friction of the wire 15 is reduced and the operability is improved as compared with the case where both ends of the wire 15 are extended to the rear end side of the hollow needle portion 11 .

In the biopsy needle 10H of Embodiment 7, the short grooves 16 and the linear grooves 17 are not necessarily required, but the provision of the short grooves 16 and the linear grooves 17 reduces the resistance during puncture. , the collection efficiency of the biological tissue piece is improved. Further, in the biopsy needle 10I of the eighth embodiment, as in the case of the biopsy needle 10G of the sixth embodiment, the inner wall 11a of the hollow needle portion 11 is provided with the hollow needle from the rear end side of the injection needle-shaped opening 12. A linear groove 17 a is formed to the rear end side of the needle portion 11 , and one wire 15 extending from the annular groove 14 is fitted into the groove 17 a formed in the inner wall 11 a of the hollow needle portion 11 . It is also possible to join and fix and extend to the rear end side of the hollow needle portion 11 .

[Embodiment 9]
A biopsy needle 10J of Embodiment 9 will be described with reference to FIG. 10A is a plan view of the biopsy needle 10J of Embodiment 9, and FIG. 10B is a longitudinal sectional view of FIG. 10A. Moreover, in FIGS. 10A and 10B, the same reference numerals are assigned to the same components as those of the biopsy needle 10F of Embodiment 5 shown in FIGS. 5A and 5B, and detailed description thereof will be omitted.

In the biopsy needle 10F of Embodiment 5, as shown in FIG. 7, a through hole 19 is formed in the rear end side 12b of the annular groove 14 formed in the opening wall 13 of the injection needle-shaped opening 12, and this through hole 19 is formed. The inside of the annular groove 14 and the inside of the hollow cylindrical needle portion 11 are communicated with each other through the hole 19, and both ends of the wire 15 are inserted through the through holes 19 to form the inner wall 11a of the hollow cylindrical needle portion 11. , extending to the operation part. On the other hand, in the biopsy needle 10J of Embodiment 9, as shown in FIG. The inside of the annular groove 14 and the outer wall of the hollow cylindrical needle portion 11 are communicated with each other through the through hole 19 a , and both ends of the wire 15 are inserted through the through holes 19 a so as to connect to the outer wall of the hollow cylindrical needle portion 11 . It extends to the operation part along the line.

According to the biopsy needle 10J of the ninth embodiment having such a configuration, the wire 15 can be easily assembled by arranging it along the outer wall of the hollow cylindrical needle portion 11 after passing the through hole 19 once. In addition, substantially the same effects as those of the biopsy needle 10 of the first embodiment can be obtained. That is, after the biopsy needle 10J of the ninth embodiment is pierced into the living tissue and the living tissue enters the hollow cylindrical needle portion 11 of the biopsy needle 10, both ends of the wire 15 are simultaneously or finely reciprocated. When a pulling operation is performed, the loop gradually detaches from the annular groove 14 of the injection needle-shaped opening 12, and the diameter of the loop becomes smaller toward the distal end side opposite to the biopsy needle 10 of Embodiment 1, Along with this, the deep part of the living tissue is cut along the annular groove 14 of the hypodermic needle-shaped opening 12 . Then, when the loop of the wire 15 reaches the through-hole 19a and is closed, substantially all of the living tissue located at the needle-shaped opening 12 is cut.

In the biopsy needle 10J of the ninth embodiment having such a configuration, as in the case of the biopsy needle 10 of the first embodiment, a linear groove may be formed on the side surface of the hollow cylindrical needle portion 11. As in the case of the biopsy needle 10H of the seventh embodiment to the biopsy needle 10I of the eighth embodiment, one end of the wire 15 is fixed with an adhesive in the vicinity of the through hole 19a in the annular groove 14, and the wire 15 is fixed. Only the other end portion may extend along the outer wall of the hollow cylindrical needle portion 11 to the operation portion through the through hole 19a. Furthermore, like the biopsy needle 10C of the second embodiment, an annular groove may be formed in the inner wall of the hollow cylindrical needle portion 11 .

[Embodiment 10]
A biopsy needle 10K of Embodiment 10 will be described with reference to FIG. 11a is a plan view of the biopsy needle of Embodiment 10, and FIG. 11B is a longitudinal sectional view of FIG. 11a. In addition, in FIGS. 11a and 11B, the same reference numerals are given to the same components as the biopsy needle 10D of Embodiment 3 shown in FIGS. 5A to 5C, and detailed description thereof will be omitted.

The configuration of the biopsy needle 10K of the tenth embodiment differs from that of the biopsy needle 10D of the third embodiment in that the U-shaped through hole 17b is formed in the biopsy needle 10D of the third embodiment, and the needle-shaped opening of the annular groove 14C in the biopsy needle 10D of the third embodiment. 12, whereas in the biopsy needle 10K of the tenth embodiment, the annular groove 14C is provided on the tip side of the needle-shaped opening 12; In the biopsy needle 10D of Embodiment 3, both ends of the wire are fitted and fixed in linear grooves 17a provided in the inner wall 11a of the hollow needle portion 11 from the rear end side of the injection needle-shaped opening 12. In contrast to the biopsy needle 10K of the tenth embodiment, a linear groove provided in the inner wall 11a of the hollow needle portion 11 from the tip side of the injection needle-shaped opening 12. 17a is fitted and fixed to extend to the operating portion side.

That is, when both ends of the wire 15 are pulled from the operation part side, the loop of the wire 15 becomes smaller from the distal end side to the rear end side in the biopsy needle 10D of the third embodiment, but the biopsy needle of the tenth embodiment. At 10K, it becomes smaller from the rear end side to the front end side. With the biopsy needle 10K of Embodiment 10 having such a configuration as well, the living tissue that has entered the interior of the hollow needle portion 11 can be efficiently cut.

[Embodiment 11]
A biopsy needle 10L of Embodiment 11 will be described with reference to FIG. 12A is a plan view of the biopsy needle of Embodiment 11, and FIG. 12B is a longitudinal sectional view of FIG. 12A. In addition, in FIGS. 12A and 12B, the same reference numerals are given to the same components as the biopsy needle 10K of Embodiment 10 shown in FIGS. 11a and 11B, and detailed description thereof will be omitted.

The configuration of the biopsy needle 10L of the eleventh embodiment differs from that of the biopsy needle 10K of the ninth embodiment in that, in the biopsy needle 10K of the ninth embodiment, the intermediate portion of the wire 15 is fitted in the annular groove 14 in a loop shape. Both ends of the wire 15 are joined together at the tip side, passed through a U-shaped through hole 17b, and passed through a linear groove 17a formed in the inner wall 11a of the hollow needle portion 11. In the biopsy needle 10L of the eleventh embodiment, one end of the wire 15 is attached to the adhesive 20 in the annular groove 14 near the U-shaped through hole 17b. , and only the other side of the wire 15 extends to the rear end side of the hollow needle portion 11 through the U-shaped through hole 17b and the linear groove 17. As shown in FIG.

According to the biopsy needle 10</b>L of the eleventh embodiment having such a configuration, it is possible to efficiently cut the living tissue that has entered the interior of the hollow needle portion 11 simply by operating one wire 15 . Also in the biopsy needle 10L of the eleventh embodiment, when the linear groove 17 is not formed, the same effect can be obtained by forming a linear groove in the outer wall of the inner needle (not shown). will be able to

[Embodiment 12]
A biopsy needle 10M of Embodiment 12 will be described with reference to FIG. 13A is a plan view of the biopsy needle of Embodiment 12, and FIG. 13B is a longitudinal sectional view of FIG. 13A. In addition, in FIGS. 13A and 13B, the same reference numerals are given to the same components as the biopsy needle 10K of Embodiment 10 shown in FIGS. 11a and 11B, and detailed descriptions thereof are omitted.

In the biopsy needle 10K of the tenth embodiment, the annular groove 14C is slightly inside from the distal end side 12a of the injection needle-shaped opening 12 and slightly inside from the rear end side 12b of the injection needle-shaped opening 12. A U-shaped through hole 17b is provided at a location slightly inside the injection needle-shaped opening 12 from the tip side 12a. Further, a linear groove 17a is formed in the inner wall 11a of the hollow needle portion 11 so as to connect to the U-shaped through hole 17b and extend to the rear end side of the hollow needle portion 11 .

On the other hand, in the biopsy needle 10M of the twelfth embodiment, an annular groove 14 is formed on the inner peripheral side of the opening wall 13 of the injection needle-shaped opening 12, and a U-shaped through hole 17b is formed on the distal end side of the annular groove 14. is formed, and the intermediate portion of the wire 15 is fitted in the annular groove 14 in a loop shape. It extends to the operation part along the inner wall 11a of the needle part 11 and is taken out from the operation part. In the biopsy needle 10M of the twelfth embodiment, a linear groove is not formed in the inner wall 11a of the hollow needle portion 11. As shown in FIG.

According to the biopsy needle 10M of the twelfth embodiment having such a configuration, since no linear groove is formed in the inner wall 11a of the hollow needle portion 11, friction increases when the wire 15 is operated. Even if there is, in other respects, it has substantially the same effects as the biopsy needle 10K of the tenth embodiment. It should be noted that the problem of increased friction during manipulation of the wire 15 can be overcome by using an inner needle having linear grooves formed on its outer peripheral surface.

[Embodiment 13]
A biopsy needle 10N of Embodiment 13 will be described with reference to FIG. 14A is a plan view of the biopsy needle of Embodiment 13, and FIG. 14B is a longitudinal sectional view of FIG. 14A. In addition, in FIGS. 14A and 14B, the same reference numerals are given to the same components as the biopsy needle 10M of the twelfth embodiment shown in FIGS. 13A and 13B, and detailed description thereof will be omitted.

The biopsy needle 10N of the thirteenth embodiment differs in configuration from the biopsy needle 10M of the twelfth embodiment in that, in the biopsy needle 10M of the twelfth embodiment, the intermediate portion of the wire 15 is fitted in the annular groove 14 in a loop shape. Both ends of the wire 15 are joined to each other on the distal end side, passed through the U-shaped through hole 17b, and routed along the inner wall 11a of the hollow needle portion 11 to the rear end side of the hollow needle portion 11. In contrast, in the biopsy needle 10N of the thirteenth embodiment, one end of the wire 15 is fixed by an adhesive 20 in the annular groove 14 near the U-shaped through hole 17b. , and only the other side of the wire 15 extends to the rear end side of the hollow needle portion 11 through the U-shaped through hole 17b.

According to the biopsy needle 10N of the thirteenth embodiment having such a configuration, it is possible to efficiently cut the living tissue inside the hollow needle portion 11 by operating only one wire 15 . Also in the biopsy needle 10N of the thirteenth embodiment, when the linear groove 17 is not formed, a linear groove may be formed in the outer wall of the inner needle (not shown) to achieve the same effect. will be able to

DESCRIPTION OF SYMBOLS 1... Ultrasonic endoscope apparatus 2... Ultrasonic probe 3... Forceps mouth 4... Sheath 5... Biopsy needle deflection means 6... Stomach 6a... Mucosal layer 6b... Submucosal layer 6c... Submucosal tumor tissue 7... Pancreas 8... Pancreas Tumor 9 Duodenum 9a Mucosal layer 9b Submucosal layer 9c Muscle layer 10, 10A to 10N Biopsy needle 11 Hollow cylindrical needle part 11a Internal wall (of hollow cylindrical needle part) 12 Injection needle shape opening 12a... tip side of opening wall 13 12b... rear end side of opening wall 13 13... opening wall 14, 14C... annular groove 14a... distal end (of annular groove) 15... wire 16, 16a... short groove 17, 17a... Linear groove 17b... U-shaped or J-shaped through hole 18, 19, 19a... Through hole 20... Adhesive

Claims (9)

a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both ends of the wire are passed from the rear end side of the opening wall of the injection needle-shaped opening to the outside of the hollow needle portion. or the wire extends to the rear end side of the hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has an intermediate portion detached into the annular groove One end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the needle-shaped opening, and the other end is the opening of the needle-shaped opening. extending from the rear end side of the wall to the rear end side of the hollow needle portion through the exterior of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion;
A linear groove is formed between the annular groove and the outer wall of the hollow needle portion on the rear end side of the opening wall of the injection needle-shaped opening, and the wire is formed in the linear groove. A biopsy needle characterized by being fitted and fixed in a groove . a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening or the inner wall of the hollow needle,
The outer wall of the hollow needle portion is provided with at least one through-hole penetrating the inside and outside of the hollow needle portion in the vicinity of the rear end side of the injection needle-shaped opening,
the wire extends through the through-hole and the inside of the hollow needle portion to the rear end side of the hollow needle portion;
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire extend from the rear end side of the opening wall of the injection needle-shaped opening through the through hole of the hollow needle portion. , the wire passes through the inside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion; An intermediate portion is removably fitted and fixed in the annular groove, one end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the needle-shaped opening, and the other end is fixed in the annular groove. extends from the rear end side of the opening wall of the injection needle-shaped opening to the rear end side of the hollow needle portion through the through hole of the hollow needle portion and through the inside of the hollow needle portion. and is operable from the rear end side of the hollow needle,
A linear groove is formed between the annular groove and the through hole of the hollow needle portion on the rear end side of the opening wall of the injection needle-shaped opening, and the wire is formed in the linear shape. A biopsy needle, characterized by being fitted and fixed in a groove of the biopsy needle. a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed through the inside of the hollow needle portion from the rear end side of the opening wall of the injection needle-shaped opening. or the wire extends to the rear end side of the hollow needle portion and is operably provided from the rear end side of the hollow needle portion; One end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the injection needle-shaped opening, and the other end is fixed to the opening wall of the injection needle-shaped opening extending from the rear end side through the inside of the hollow needle portion to the rear end side of the hollow needle portion and being operable from the rear end side of the hollow needle portion,
A through hole is provided between the annular groove on the rear end side of the injection needle-shaped opening and the inside of the hollow needle portion,
A biopsy needle, wherein the wire extends through the through-hole and the interior of the hollow needle portion to a rear end side of the hollow needle portion . a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed in the inner wall of the hollow needle,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed through the inside of the hollow needle portion from the rear end side of the opening wall of the injection needle-shaped opening. or the wire extends to the rear end side of the hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has an intermediate portion detached into the annular groove One end is fixed in the annular groove in the vicinity of the rear end side of the opening wall of the needle-shaped opening, and the other end is the opening of the needle-shaped opening. extending from the rear end side of the wall through the interior of the hollow needle portion to the rear end side of the hollow needle portion, and being operable from the rear end side of the hollow needle portion,
A U-shaped or J-shaped through-hole is formed between the annular groove and the inner wall of the hollow needle portion on the rear end side of the injection needle-shaped opening, and the wire is A biopsy needle that extends to a rear end side of the hollow needle portion through the through hole and the inside of the hollow needle portion . a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed from the front end side of the opening wall of the injection needle-shaped opening to the outside of the hollow needle portion. Either the wire extends to the rear end side of a hollow needle and is operably provided from the rear end side of the hollow needle , or the wire has an intermediate portion removably fitted within the annular groove. One end is fixed in the annular groove in the vicinity of the front end side of the opening wall of the injection needle-shaped opening, and the other end is the front end side of the opening wall of the injection needle-shaped opening. through the outside of the hollow needle portion and extends to the rear end side of the hollow needle portion, and is provided so as to be operable from the rear end side of the hollow needle portion,
A through hole is provided between the annular groove on the front end side of the injection needle-shaped opening and the interior of the hollow needle,
The biopsy needle, wherein the wire extends to the rear end side of the hollow needle through the through-hole and the outside of the hollow needle . a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed in the inner wall of the hollow needle,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed from the front end side of the opening wall of the injection needle-shaped opening to the inside of the hollow needle portion. Either the wire extends to the rear end side of a hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has a middle portion removably within the annular groove. Fitted and fixed, one end is fixed in the annular groove in the vicinity of the front end side of the opening wall of the needle-shaped opening, and the other end is the front end of the opening wall of the needle-shaped opening. is provided so as to pass through the inside of the hollow needle portion from the side and extend to the rear end side of the hollow needle portion so as to be operable from the rear end side of the hollow needle portion,
A U-shaped or J-shaped through-hole is formed between the annular groove and the inner wall of the hollow needle portion on the front end side of the injection needle-shaped opening, and the wire A biopsy needle that extends to the rear end side of the hollow needle portion through the through hole and the inside of the hollow needle portion . a hollow needle portion having an injection needle-shaped opening inclined from the front end side to the rear end side at the tip;
a cutting means comprising a wire for cutting the biological tissue located in the injection needle-shaped opening provided on the distal end side of the hollow needle;
A biopsy needle for piercing into a living tissue and taking a part of the living tissue into the interior of the hollow needle portion for collection,
An annular groove is formed on the surface of the opening wall of the injection needle-shaped opening,
The wire has an intermediate portion removably fitted and fixed in the annular groove, and both end sides of the wire are passed from the front end side of the opening wall of the injection needle-shaped opening to the inside of the hollow needle portion. Either the wire extends to the rear end side of a hollow needle portion and is operably provided from the rear end side of the hollow needle portion , or the wire has a middle portion removably within the annular groove. Fitted and fixed, one end is fixed in the annular groove in the vicinity of the front end side of the opening wall of the needle-shaped opening, and the other end is the front end of the opening wall of the needle-shaped opening. is provided so as to pass through the inside of the hollow needle portion from the side and extend to the rear end side of the hollow needle portion so as to be operable from the rear end side of the hollow needle portion,
A U-shaped or J-shaped through-hole is formed between the annular groove and the inner wall of the hollow needle portion on the front end side of the injection needle-shaped opening, and the wire A biopsy needle that extends to the rear end side of the hollow needle portion through the through hole and the inside of the hollow needle portion . Claims 1 to 7 , characterized in that the wire is fitted and fixed in the annular groove so as to form substantially the same surface as the wall surface on which the annular groove is formed. The biopsy needle according to any one of 1 . The biopsy needle according to any one of claims 1 to 8 , wherein the wire is fixed in the annular groove with an easily peelable adhesive.

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