JP2018157890A - Indwelling needle puncture device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve arrangement flexibility of a first regulation part and a second regulation part in an indwelling needle puncture device.SOLUTION: An indwelling needle puncture device 1 includes an operation part 13 being swingingly operable using an intermediate part as a supporting point 13a, and releases regulation by the first regulation part 11 and second regulation part 12 using contradictory-directional displacement of one end and the other end by the swinging operation. This configuration can improve arrangement flexibility of the first regulation part 11 and second regulation part 12 such as arranging the first regulation part 11 separately from the second regulation part 12, compared with a case of releasing the regulation by the first regulation part 11 and second regulation part 12 by a same-directional displacement.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an indwelling needle puncture device for piercing a living tissue with an indwelling needle.

  An outer needle that is punctured and placed in the living tissue, an outer needle hub that is connected to the base of the outer needle, and an inner needle that is inserted from the proximal end side and protrudes from the front end of the outer needle There is known an indwelling needle puncture device including an inner needle having a sharp cutting edge at a distal end and an inner needle hub connected to a base portion of the inner needle.

  For example, an indwelling needle puncture device shown in Patent Document 1 includes a case that slidably supports an inner needle hub, a retracting spring that biases the inner needle hub in a direction in which the inner needle is pulled into the case, A cylindrical projecting cover provided so as to be able to project from the distal end portion toward the cutting edge of the inner needle, a projecting spring that urges the projecting cover in the projecting direction, and a first regulating unit that regulates the retraction of the inner needle by the retracting spring. And a second restriction part for restricting the protrusion of the protrusion cover by the protrusion spring, and an operation part for releasing the restriction by the first restriction part and the second restriction part according to a predetermined operation. In response to the release of the restriction by the part and the second restricting part, the base cover side of the inner needle is pulled into the case, and the protruding cover is protruded to cover the distal end side of the inner needle. According to such an indwelling needle puncture device, even if it is a long inner needle, it is possible to cover the inner needle with the protruding cover and case and safely dispose of it only by operating the operation part after the indwelling needle puncturing operation. Become.

JP 2002-126090 A

  However, in the indwelling needle puncture tool shown in Patent Document 1, the first restricting portion and the second restricting portion are displaced in the same direction according to the operation of the operation portion, and the first restricting portion and the second restricting portion are based on the displacement. Since the restriction by the restriction part is released, the degree of freedom of arrangement of the first restriction part and the second restriction part is low, and it is difficult to individually set the restriction release operation stroke and the restriction release operation force of each restriction part. There was room for improvement in operability.

The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 is an outer needle that is punctured and placed in a living tissue. An outer needle hub connected to the base of the outer needle, an inner needle having a sharp cutting edge at the tip that is inserted into the outer needle from the proximal end and protrudes from the front end of the outer needle, An inner needle hub connected to the base of the inner needle; a case for slidably supporting the inner needle hub; and a retracting spring for biasing the inner needle hub in a direction in which the inner needle is pulled into the case. A cylindrical projecting cover provided to project from the tip of the case in the direction of the cutting edge of the inner needle, a projecting spring for biasing the projecting cover in the projecting direction, and the inner needle by the retracting spring A first restricting portion for restricting the pull-in of A second restricting portion for restricting the protrusion of the protruding cover by the spring for delivery; and an operation portion for releasing the restriction by the first restricting portion and the second restricting portion according to a predetermined operation, Indwelling needle puncture covering the distal end side of the inner needle by projecting the projecting cover while pulling the proximal end side of the inner needle into the case in response to the release of the regulation by the first regulating portion and the second regulating portion The operating portion can be swung with the intermediate portion as a fulcrum, and the restriction by the first restricting portion is released based on the displacement of the one end accompanying the swinging operation, and the rocking The restriction by the second restriction part is released based on the displacement of the other end part accompanying the moving operation.
Invention of Claim 2 is the indwelling needle puncture device of Claim 1, Comprising: The said operation part has the distance from the said fulcrum to the said one end part, and the distance from the said fulcrum to the said other end part. It is characterized by being different.
Invention of Claim 3 is the indwelling needle puncture device of Claim 1 or 2, Comprising: The said 1st control part and the said 2nd control part are integrally formed with the said operation part, It is characterized by the above-mentioned. To do.

According to the first aspect of the present invention, the operation portion can be swung with the intermediate portion as a fulcrum, and the first restricting portion is utilized by utilizing the displacement in the contralateral direction of the one end and the other end accompanying the swing operation. Since the restriction by the second restriction part is released, the first restriction part and the second restriction part are separated from each other as compared with the case where the restriction by the first restriction part and the second restriction part is released based on the displacement in the same direction. The degree of freedom of arrangement of the first restricting portion and the second restricting portion can be increased.
According to the invention of claim 2, since the distance from the fulcrum to the one end is different from the distance from the fulcrum to the other end, the operation part has a restriction release operation stroke and a restriction release operation force of each restriction part. Can be set individually to improve operability.
According to the invention of claim 3, since the first restricting portion and the second restricting portion are formed integrally with the operation portion, an increase in the number of parts and a complicated structure can be avoided.

It is sectional drawing of the indwelling needle puncture device which concerns on embodiment of this invention. It is operation | movement explanatory drawing of the indwelling needle puncture device which concerns on embodiment of this invention, and is sectional drawing which shows the state before an indwelling needle puncture operation | work (detachable cover is a removal state). It is operation | movement explanatory drawing of the indwelling needle puncture device which concerns on embodiment of this invention, and is sectional drawing which shows the state after an indwelling needle puncture operation | work. It is operation | movement explanatory drawing of the indwelling needle puncture device which concerns on embodiment of this invention, and is sectional drawing which shows the state after operating an operation part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes an indwelling needle puncture device. The indwelling needle puncture device 1 is connected to an outer needle 2 that is punctured and placed in a living tissue, and a base of the outer needle 2. An outer needle hub 3, an inner needle 4 that is inserted into the outer needle 2 from the proximal end side and has a sharp cutting edge 4 a at the distal end protruding from the front end of the outer needle 2, and a base portion of the inner needle 4. The inner needle hub 5 to be connected, the inner needle hub holding portion 6 that holds the inner needle hub 5, the case 7 that supports the inner needle hub 5 slidably via the inner needle hub holding portion 6, and the inner needle hub A retracting spring 8 that urges the inner needle hub 5 in a direction in which the inner needle 4 is pulled into the case 7 through the holding portion 6, and a protrusion of the inner needle 4 from the distal end portion of the case 7 toward the cutting edge of the inner needle 4 are provided. A cylindrical projecting cover 9, a projecting spring 10 that biases the projecting cover 9 in the projecting direction, and an inner needle 4 by a retracting spring 8. By the first restricting portion 11 that restricts the pull-in, the second restricting portion 12 that restricts the protrusion of the protruding cover 9 by the protruding spring 10, and the first restricting portion 11 and the second restricting portion 12 according to a predetermined operation. An operation unit 13 for releasing the regulation and a detachable detachable cover 14 that covers the outer needle 2 and the inner needle 4 when not in use are provided.

  Then, the indwelling needle puncture device 1 causes the protruding cover 9 to protrude while pulling the proximal end side of the inner needle 4 into the case 7 in accordance with the release of the restriction by the first restriction part 11 and the second restriction part 12. The tip side of the inner needle 4 is covered. As a result, even if the inner needle 4 is long, the inner needle 4 can be covered with the protruding cover 9 and the case 7 and disposed of safely only by operating the operation portion 13 after the indwelling needle puncturing operation. Hereinafter, each part of the indwelling needle puncture device 1 according to the present embodiment will be specifically described.

  The case 7 has a bottomed cylindrical shape whose rear end is closed, and a hollow outer needle hub holding portion 7a that constitutes a male luer protrudes from the tip. The inner needle 4 is a solid needle or a hollow needle made of a hard material. The inner needle 4 extends forward from the inner needle hub 5 slidably received in the case 7 and the hollow portion of the outer needle hub holding portion 7a. It passes through and protrudes outside the case 7. The outer needle 2 is a hollow needle having flexibility, and the inner needle 4 is inserted through the inside thereof. The outer needle hub 3 connected to the base end portion of the outer needle 2 forms a female luer and is detachably held by the outer needle hub holding portion 7a of the case 7.

  The inside of the case 7 is divided into a front chamber 7c and a rear chamber 7d by a partition wall 7b. The inner needle hub 5 and the inner needle hub holding portion 6 are accommodated in the rear chamber 7d so as to be slidable back and forth. Is extended to the front chamber 7c side through a hole 7e formed in the central portion of the partition wall 7b.

  The retracting spring 8 is a tension coil spring, and is housed in the rear chamber 7d with one end connected to the bottom of the case 7 and the other end connected to the inner needle hub holding part 6. The first restricting portion 11 restricts the retraction of the inner needle 4 by the retraction spring 8 by locking the inner needle hub holding portion 6 at the front end position of the rear chamber 7d. The first restricting portion 11 of the present embodiment has an engagement hole 6 a formed in the outer peripheral portion of the inner needle hub holding portion 6 from the outer peripheral side of the case 7 through a hole 7 f formed in the outer peripheral portion of the case 7. By pulling out the first restricting portion 11 from the engaging hole 6 a of the inner needle hub holding portion 6, the inner needle 4 can be retracted by the retracting spring 8.

  The protruding cover 9 is accommodated in the front chamber 7c of the case 7 so as to cover the proximal end side of the inner needle 4, and forwardly from the front end portion of the case 7 through the hollow portion of the outer needle hub holding portion 7a. It is provided so that it can protrude. The protruding spring 10 is a compression coil spring, and is disposed between the flange 9a formed at the rear end portion of the protruding cover 9 and the partition wall 7b. The second restricting portion 12 restricts the protrusion of the protrusion cover 9 by the protrusion spring 10 by locking a flange 9 a formed at the rear end portion of the protrusion cover 9. The 2nd control part 12 of this embodiment is a plate member which can be slid to radial direction with respect to the case 7, and is provided with the flange passage hole 12a which accept | permits passage of the flange 9a. Then, in the initial state, the second restricting portion 12 restricts the protrusion of the protrusion cover 9 by the protrusion spring 10 by locking the flange 9a at the edge of the flange passage hole 12a, while being pushed. The protrusion of the protrusion cover 9 by the protrusion spring 10 is allowed by releasing the locking of the flange 9a by the edge of the flange passage hole 12a.

  The operation portion 13 can be swung with the intermediate portion as a fulcrum 13a, and the restriction by the first restricting portion 11 is released based on the displacement of one end accompanying the swing operation, and the swing portion is accompanied by the swing operation. Based on the displacement of the other end, the restriction by the second restriction part 12 is released.

  Specifically, the operation unit 13 according to the present embodiment is arranged along the front-rear direction on the outer peripheral surface of the case 7 and is configured to be able to swing up and down with a fulcrum 13a provided at the intermediate part in the front-rear direction. ing. In the initial state, the front side of the operation unit 13 is separated from the outer peripheral surface of the case 7, and the rear side of the operation unit 13 is close to the outer peripheral surface of the case 7. The rocking operation is performed by pushing in the approaching direction. One end portion of the second restricting portion 12 is integrally connected to the front end portion 13 b of the operation portion 13, and the second restricting portion 12 according to the displacement in the pushing direction of the front end portion 13 b accompanying the operation of the operation portion 13. The protrusion restriction of the protrusion cover 9 due to is released. In addition, one end of the first restricting portion 11 is integrally connected to the rear end portion 13c of the operation portion 13, and the first end portion 13c is connected to the rear end portion 13c in accordance with the displacement of the rear end portion 13c in accordance with the operation of the operation portion 13. 1 Pull-in restriction of the inner needle 4 by the restricting part 11 is released.

  The operation unit 13 is different in a distance L1 from the fulcrum 13a to the rear end 13c and a distance L2 from the fulcrum 13a to the front end 13b. As a result, it is possible to individually set the regulation release operation stroke and regulation release operation force of each regulation unit 11 and 12 and improve operability. For example, in this embodiment, since the urging force of the retracting spring 8 is greater than the urging force of the protruding spring 10, the restriction releasing operation force of the first restricting portion 11 is the restricting operating force of the second restricting portion 12. However, by making the distance L1 smaller than the distance L2, the restriction releasing operation force of the first restricting portion 11 is reduced based on the lever principle.

  Next, the operation (operation procedure) of the indwelling needle puncture device 1 will be described with reference to FIGS.

  As shown in FIG. 2, when using the indwelling needle puncture device 1, first, the detachable cover 14 is removed. This makes it possible to perform an indwelling needle puncturing operation in which the outer needle 2 and the inner needle 4 are punctured into the living tissue and the outer needle 2 is placed in the living tissue.

  As shown in FIG. 3, when the indwelling needle puncturing operation is completed, the front side of the operation unit 13 is pushed in. When the front side of the operation part 13 is pushed in, as shown in FIG. 4, the protrusion restriction of the protrusion cover 9 by the second restriction part 12 is released according to the displacement in the pushing direction of the front end part 13 b accompanying the operation of the operation part 13. At the same time, the restriction of the inner needle 4 by the first restricting portion 11 is released according to the displacement in the pulling direction of the rear end portion 13c accompanying the operation of the operation portion 13. Thereby, while pulling the proximal end side of the inner needle 4 into the case 7, the protruding cover 9 can be protruded to cover the distal end side of the inner needle 4. As a result, even if the inner needle 4 is long, The inner needle 4 is covered with the protruding cover 9 and the case 7 and can be safely discarded.

  According to the indwelling needle puncture device 1 of the present embodiment configured as described above, the operation portion 13 can be swung with the intermediate portion as a fulcrum 13a, and the one end and the other end of the swivel operation are provided. Since the restriction by the first restriction part 11 and the second restriction part 12 is released using the displacement in the contralateral direction, the restriction by the first restriction part 11 and the second restriction part 12 is released based on the displacement in the same direction. Compared to the above, it is possible to increase the degree of freedom of arrangement of the first restricting portion 11 and the second restricting portion 12 such as arranging the first restricting portion 11 and the second restricting portion 12 apart from each other.

  Moreover, since the distance L1 from the fulcrum 13a to the rear-end part 13c and the distance L2 from the fulcrum 13a to the front-end part 13b differ in the operation part 13, the restriction release operation stroke and restriction | regulation of each restriction part 11 and 12 are carried out. The release operation force can be set individually to improve operability.

  Moreover, since the 1st control part 11 and the 2nd control part 12 are integrally formed with the operation part 13, the increase in a number of parts and complication of a structure can also be avoided.

  Moreover, according to the indwelling needle puncture device 1 of the present embodiment, in use, not only can the indwelling needle puncture work be performed satisfactorily in a long state where the outer needle 2 and the inner needle 4 are exposed, but also after use. By retracting the protruding cover 9 and covering the distal end side of the inner needle 4 while pulling the proximal end side of the inner needle 4 into the case 7, it can be safely discarded in a shorter state than in use.

DESCRIPTION OF SYMBOLS 1 Indwelling needle puncture tool 2 Outer needle 3 Outer needle hub 4 Inner needle 4a Cutting edge part 5 Inner needle hub 6 Inner needle hub holding part 6a Engagement hole 7 Case 7a Outer needle hub holding part 7b Partition wall 7c Front chamber 7d Rear chamber 7e Hole 7f Hole 8 Pull-in spring 9 Protruding cover 9a Flange 10 Protruding spring 11 First restricting portion 12 Second restricting portion 12a Flange passage hole 13 Operating portion 13a Support point 13b Front end portion 13c Rear end portion 14 Detachable covers L1, L2 Distance

Claims (3)

An outer needle that is punctured and placed in the living tissue;
An outer needle hub coupled to the base of the outer needle;
An inner needle inserted into the outer needle from the proximal end side and having a sharp cutting edge at the distal end protruding from the front end of the outer needle;
An inner needle hub connected to the base of the inner needle;
A case for slidably supporting the inner needle hub;
A retracting spring that biases the inner needle hub in a direction in which the inner needle is retracted into the case;
A cylindrical projecting cover provided so as to project from the tip of the case in the direction of the cutting edge of the inner needle;
A protruding spring for urging the protruding cover in the protruding direction;
A first restricting portion for restricting retraction of the inner needle by the retraction spring;
A second restricting portion for restricting the protrusion of the protrusion cover by the protrusion spring;
An operation unit that releases the restriction by the first restriction unit and the second restriction unit according to a predetermined operation, and according to the release of the restriction by the first restriction unit and the second restriction unit, An indwelling needle puncture device that covers the distal end side of the inner needle by protruding the protruding cover while pulling the proximal end side of the inner needle into the case,
The operation portion can be swung with an intermediate portion as a fulcrum, and the restriction by the first restricting portion is released based on the displacement of one end portion accompanying the swing operation, An indwelling needle puncture device, wherein the restriction by the second restriction part is released based on the displacement of the end part.   The indwelling needle puncture device according to claim 1, wherein a distance from the fulcrum to the one end is different from a distance from the fulcrum to the other end.   The indwelling needle puncture device according to claim 1 or 2, wherein the first restricting portion and the second restricting portion are formed integrally with the operation portion.

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