JPWO2010061675A1 - Catheter, method for inserting catheter into body, and method for extracting catheter from body - Google Patents

Abstract

A catheter that guides a drug into the body of a mammal including a human, and is provided on a side surface of the catheter, and includes an anchoring unit 10 that changes its shape by an operation from outside the body and anchors the catheter in the body. The wire 12 is attached to the anchor 13 at the distal end of the catheter, the proximal end is located outside the body, and is disposed along the internal passage 14 of the catheter. The wire 12 is disposed from the position of the anchor 13 toward the proximal end. The shape of the mooring part 10 is changed by moving forward or backward, and the catheter is moored or released from the body.

Description

  The present invention relates to a catheter that can be anchored in the body of a mammal including a human and guides a drug into the body, a method for inserting the catheter into the body, and a method for extracting the catheter from the body.

  Traditionally, catheters have been used to guide drugs into the body of mammals, including humans. In this conventional catheter, a puncture needle having an internal passage is attached to the distal end of a flexible tube (see Patent Document 1). In order to fix such a catheter in a predetermined position, it is generally performed to bandage the catheter on the body surface with a bandage.

JP-A-3-57457

  By the way, it is preferable that the catheter in the body is similarly anchored to the organ in the body. However, when a member for anchoring is provided, the presence of the member for anchoring obstructs the insertion and extraction processes of the catheter. There was a problem that it took time and effort.

  The present invention has been made in view of the above, and a catheter that can be securely anchored in the body without affecting the insertion and extraction processes of the catheter, a method for inserting the catheter into the body, and the catheter It aims at providing the extraction method from the inside of the body.

  In order to solve the above-described problems and achieve the object, a catheter according to the present invention is a catheter that guides a drug into the body of a mammal including a human, and is provided on a side surface of the catheter and is shaped by an operation from outside the body. And a mooring part for mooring the catheter in the body.

  Further, the catheter according to the present invention is the tube according to the above-described invention, comprising a tube that guides the drug into the body, and at least one drug discharge hole that is provided at a distal end of the tube and discharges the drug guided to the tube into the body. And the mooring part is provided in the medicine administration part.

  Further, the catheter according to the present invention is the above-described invention, and includes a wire rod having a distal end attached to a predetermined portion of the catheter, a proximal end located outside the body, and disposed along the catheter. The shape of the anchoring portion is changed by moving the wire forward or backward with respect to the catheter on the proximal end side from the position.

  The catheter according to the present invention is characterized in that, in the above-described invention, the wire is a metal wire.

  Further, the catheter according to the present invention is the above-described invention, wherein the anchoring portion is provided in the catheter on the proximal end side from the attachment position of the wire, and is a flexible part than the other part of the catheter, By pulling the wire rod toward the proximal end side from the attachment position of the wire rod to the catheter toward the proximal end side, the anchoring portion which is the flexible portion is compressed, and the anchoring portion is radially outward. It is characterized by a bulge.

  Further, the catheter according to the present invention is the above-described invention, wherein the anchoring portion includes a protruding portion protruding outward from the catheter, a core provided inside the protruding portion, and the wire. A joint for pivotally attaching the core material to the catheter by pulling the wire material toward the proximal side from the catheter on the proximal side from the attachment position of the wire to the catheter, The core material is rotated, and an angle formed by a protruding direction of the protruding portion with respect to an axial direction of the catheter is changed.

  Further, the catheter according to the present invention further includes a distal end portion separable at the distal end and a projection provided in the internal passage in the above-described invention, and the distal end of the wire is attached to the distal end portion, Through the internal passage of the catheter, the proximal end is located outside the body, the anchoring portion is provided in the catheter on the proximal end side from the protrusion, and is a portion that is more flexible than other portions of the catheter, By pulling the wire rod toward the proximal end side with respect to the catheter, the distal end portion is locked at the protrusion when the distal end portion moves to the proximal end side through an internal passage in the catheter. Then, a compressive pressure is applied to the mooring part which is the flexible part, and the mooring part protrudes in a radially outward direction.

  In the catheter according to the present invention, in the above-described invention, the distal end portion is a puncture portion with a sharp tip, and the puncture portion of the distal end portion is in a state where the distal end portion is locked by the projection portion. Is configured to be accommodated in the internal passage of the catheter.

  Further, the catheter according to the present invention includes a coupled portion that is attached to a predetermined portion of the catheter and can be coupled or engaged with a wire in the internal passage of the catheter in the above-described invention. By pushing or pulling the joined or engaged wire toward the proximal end, the joining or engaging position is advanced or retracted relative to the proximal catheter, thereby changing the shape of the anchoring portion. It is characterized by that.

  In the above-described invention, the catheter according to the present invention is located on the proximal end side of the catheter from the anchoring portion, and delivers a drug toward the distal end of the catheter, and the catheter of the catheter from the anchoring portion. And a distal end portion located on the distal end side, wherein the shape of the anchoring portion is changed by relatively moving the delivery portion and the distal end portion.

  The method of inserting a catheter according to the present invention into a body includes inserting a catheter having a wire and a mooring portion protruding to the outer surface by pulling the wire into a living tissue and placing the catheter into the body. A puncturing step in which the catheter is punctured into the living tissue and the anchoring portion is positioned in the living tissue in a state where the anchoring portion does not protrude, and the anchoring portion is protruded by pulling the wire. A position fixing step of fixing a position of the catheter and the living tissue by the anchoring portion.

  In addition, the method for extracting the catheter from the body according to the present invention is a catheter having a wire and an anchoring portion whose protrusion is reduced from the outer surface by pushing or pulling the wire, and is anchored to a living tissue. A method for extracting a catheter from the body tissue, which is for extracting the catheter from the body tissue, wherein the anchoring reduction step reduces the protrusion from the outer surface of the anchoring portion by pressing or pulling the wire rod while pressing the proximal end of the catheter. A step of withdrawing the catheter from the living tissue.

  According to the present invention, the mooring portion provided on the side surface of the catheter that guides the drug into the body of a mammal including a human is moored in the body by changing its shape by an operation from outside the body. It can be securely anchored in the body without affecting the catheter insertion and extraction process.

FIG. 1 is a schematic diagram showing a state where the catheter according to the first embodiment of the present invention is applied to a human body. FIG. 2 is a perspective view showing a detailed configuration of a drug administration unit of the catheter shown in FIG. FIG. 3 is a cross-sectional view showing a detailed configuration of a drug administration unit of the catheter shown in FIG. FIG. 4 is a flowchart showing a procedure for inserting the catheter into the body. FIG. 5 is a flowchart showing a procedure for extracting the catheter from the body. FIG. 6 is a perspective view showing a detailed configuration of the drug administration unit of the catheter according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view showing a detailed configuration of the drug administration section of the catheter shown in FIG. FIG. 8 is a perspective view showing a detailed configuration of the drug administration unit of the catheter according to the third embodiment of the present invention. FIG. 9 is a cross-sectional view showing a detailed configuration of the drug administration unit of the catheter shown in FIG. FIG. 10 is a cross-sectional view showing a configuration of a modified example of the catheter shown in FIG. FIG. 11: is sectional drawing which shows the detailed structure of the chemical | medical agent administration part of the catheter concerning Embodiment 4 of this invention. 12 is a cross-sectional view showing a configuration of Modification 1 in which the position of the medicine discharge hole of the catheter shown in FIG. 3 is changed. FIG. 13 is a cross-sectional view showing a configuration of Modification 2 in which the position of the medicine discharge hole of the catheter shown in FIG. 3 is changed. FIG. 14 is a cross-sectional view showing a configuration of Modification 3 in which the configuration of the wire material is deleted from the catheter shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a catheter according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic view showing a state in which a drug administration device having a catheter according to Embodiment 1 of the present invention is applied to a human body. FIG. 2 is a perspective view showing a state in which the drug administration part of the catheter shown in FIG. 1 is anchored to a body organ. Further, FIG. 3 is a cross-sectional view showing the configuration of the drug administration unit including the state change of the mooring unit. In FIG. 1, a drug such as an anticancer drug of about several tens of ml is continuously and intensively discharged over a long period of about one week to an administration subject that is a mammal including a human, for example, a body organ 4 such as a liver. The case of planned administration is shown. In addition, the chemical | medical agent here contains a liquid and a gel-form chemical | medical agent.

  1 to 3, a drug administration device 100 includes a catheter 1 and a drug administration device main body 3 that supplies a drug to the catheter 1. The catheter 1 includes a tube 2 formed of flexible polyethylene having biocompatibility, and a drug administration formed of hard titanium or molded polyethylene terephthalate (PET) resin provided at the distal end of the tube 2. Part 8. The drug administration unit 8 is punctured into the internal organ 4. A stopper 7 is provided between the tube 2 and the drug administration unit 8, and the stopper 7 is applied to the surface of the internal organ 4 to define a relative position between the internal organ 4 and the drug administration unit 8. The stopper 7 can be moved and adjusted along the axial direction of the catheter 1.

  The drug administration device body 3 is fixed to the body surface 6 and supplies the drug to the catheter 1 side as described above. The drug administration device body 3 variably controls the drug extrusion pressure. The drug administration device main body 3 does not have to be attached to the body surface 6, and can be configured to be embedded in the body or to be spaced apart from the body, for example.

  As shown in FIG. 2, the drug administration part 8 is provided with a drug discharge hole 9 on a side surface, and a mooring part 10 protruding radially outward is provided between the pointed tip part 11 and the drug discharge hole 9. . The anchoring portion 10 is raised from the surface of the catheter 1 in a state where at least the catheter 1 is indwelled in the body, and anchors the catheter 1 in the body organ 4. In addition, the shape of the mooring part 10 can be deformed by an operation from outside the body, as will be described later.

  The position of the mooring portion 10 is preferably in the vicinity of the medicine discharge hole 9 because the medicine discharge position is stable. However, the position of the anchoring part 10 is not limited to the vicinity of the medicine discharge hole 9 but can be provided at an appropriate position in consideration of the arrangement of the target organ and surrounding tissues from among the parts where the catheter 1 is introduced into the body. . Moreover, the mooring part 10 may be provided not only in one place but in multiple places.

  FIG. 3 is a cross-sectional view for explaining the shape change of the mooring portion 10. FIG. 3A shows the state of the catheter 1 before or during insertion into the body. A wire 12 such as a metal wire passes through the internal passage 14 of the catheter 1, and the tip of the wire 12 is attached to the catheter 1 by an anchor 13. Note that the proximal end of the catheter 1 is in a state of protruding out of the body from the opening on the proximal end side of the internal passage 14 of the catheter 1. The anchoring portion 10 has a thin film portion 15 that is thinner than the other conduit portion of the catheter 1, and the thin film portion 15 is more flexible than the other conduit portion of the catheter 1.

  In the state of FIG. 3A, the catheter 1 is inserted to a desired position of the affected part 5. That is, the operator pulls the distal end portion to the state shown in FIG. 3A in which the anchoring portion 10 is fully extended, presses the affected portion and punctures the catheter (FIG. 4: step S101). After the insertion, as shown by the arrow in FIG. 3A, when the operator pulls the wire 12 toward the proximal end side, the distal end portion of the catheter 1 is moved together with the anchor 13 as shown in FIG. It moves to the proximal end side of the catheter 1. By this movement, a compression pressure is applied to the thin film portion 15, and the thin film portion 15 rises in the radially outward direction. The catheter 1 is anchored to the diseased part 5 by raising the thin film part 15 of the anchoring part 10. And an operator fixes so that the base end of the wire 12 may not move with respect to the base end of the catheter 1 (FIG. 4: step S102).

  Thereafter, when the drug administration by the catheter 1 is completed, as shown in FIG. 3C, when the operator further pulls the wire 12 toward the proximal end side of the catheter 1, the protrusion by the thin film portion 15 of the anchoring portion 10 is moved to the catheter. 1 is inclined to the tip side (FIG. 5: step S201). In this case, the mooring portion 10 has a small resistance with respect to the direction in which the catheter 1 is pulled out from the body, and can be easily pulled out. That is, the catheter 1 can be easily removed from the body by pulling out the entire catheter 1 while maintaining the state of FIG. 3C (FIG. 5: step S202).

  In step S201, the wire 12 is pulled toward the base end side. However, the wire 12 may be pushed from the base end side to reduce the protrusion of the anchoring portion 10. That is, when the wire 12 has a certain degree of rigidity, by pushing the wire 12 from the proximal end side from the moored state shown in FIG. It moves and the thin film part 15 of the mooring part 10 becomes flat as shown to Fig.3 (a). In other words, by pushing the wire 12 from the base end, the moored state of FIG. 3B is restored to the puncture state of FIG. In this restored state, the catheter 1 can be easily removed from the body by pulling out the entire catheter 1.

  In the first embodiment, the anchoring portion 10 does not get in the way when the catheter 1 is inserted and removed, and the catheter 1 can be smoothly inserted and removed, and the catheter 1 is securely anchored in the body by the anchoring portion 10 during drug administration. Therefore, stable drug administration can be performed.

  If the elasticity of the thin film portion 15 is sufficiently large, the wire 12 is released from the state of FIG. 3B by releasing the fixing of the wire 12, so in this case, the wire 12 You may make it cancel fixation.

  Moreover, although the metal wire 12 can use a metal wire, a thread | yarn, a string, etc., it is not limited to this. When a metal wire is used as the wire 12, it is possible to prevent the catheter 1, particularly the thin film portion 15 from being folded like an accordion due to pressure in the insertion direction when inserted into the internal passage 14 of the catheter 1. Therefore, it is preferable.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In this Embodiment 2, as shown in FIG. 6, the spike-shaped protrusion part 16 is provided as a mooring part. FIG. 7 is a cross-sectional view showing a configuration of a drug administration section of a catheter according to Embodiment 2 of the present invention. As shown in FIG. 7 (a), a wire 17 is inserted into the internal passage 14 of the catheter 1, and the wire 17 is placed inside the protrusion 16 by a rotation joint 19 provided at a position corresponding to the protrusion 16. It is rotatably coupled to the proximal end portion of the embedded rod-shaped core material 18. A distal end stopper 21 is provided at the distal end of the wire rod 17, and when the distal end stopper 21 abuts on the distal end surface of the internal passage 14 of the catheter 1, further advancement of the wire rod 17 in the distal end direction is inhibited. Further, the wire 17 is provided with an intermediate stopper 20 in the vicinity of the proximal end side of the protruding portion 16, and the intermediate stopper 20 is closer to the proximal end than the intermediate stopper 20 in the internal passage 14 near the proximal end side of the protruding portion 16. Further contact with the abutment protrusion 22 provided on the hindrance prevents further retreat of the wire rod 17.

  In the state of FIG. 7A, the distal end stopper 21 is in contact with the distal end surface. In this case, the core material 18 is inclined toward the proximal end side of the catheter 1 with respect to the axis of the wire rod 17. Similarly, the protruding direction of the protruding portion 16 is inclined toward the proximal end side of the catheter 1, so that the catheter 1 can be easily inserted into the body.

  Here, as shown in FIG. 7A, when the wire 17 is pulled toward the proximal end side of the catheter 1, the core 18 is orthogonal to the axis of the wire 17 as shown in FIG. 7B. Thus, the protruding portion 16 protrudes radially outward with respect to the axis of the catheter 1. As a result, the catheter 1 is anchored in the body.

  Thereafter, when the administration of the medicine is completed, as shown in FIG. 7B, when the wire 17 is further pulled toward the proximal end side of the catheter 1 until the intermediate stopper 20 contacts the contact protrusion 22, As shown in c), since the core material 18 is inclined toward the distal end side with respect to the axis of the wire rod 17, the protruding direction of the protruding portion 16 is similarly inclined toward the distal end side of the catheter 1. Pulling out becomes easy.

  The shape of the protruding portion 16 is not limited to a spike shape, and may be, for example, a disk shape or a donut shape having an opening at the center, similar to the shape of the mooring portion 10 shown in FIG.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. In the third embodiment, as shown in FIG. 8, a plug 23, which is a separable distal end portion, is provided at the distal end of the catheter 1, and an anchoring portion 25 is formed on the distal end side surface of the catheter 1 using this plug 23. Is.

  FIG. 9 is a cross-sectional view showing the configuration of the drug administration section of the catheter according to Embodiment 3 of the present invention. As shown in FIG. 9A, the plug 23 is housed in the internal passage of the catheter 1 at the distal end of the drug administration section 8 of the catheter 1. The wire 24 is attached to the plug 23 through the internal passage of the catheter 1. As in the first embodiment, the mooring portion 25 is formed with a thin film portion 27 that is thinner than the other duct portion 26 of the catheter 1. In addition, a contact step 28 is provided at the distal end of the internal passage of the catheter 1, and the plug 23 is restricted from moving toward the proximal end of the catheter 1 by contacting the proximal end of the plug 23. Yes.

  When the wire 24 is pulled toward the proximal end side of the catheter 1 in the state shown in FIG. 9A, the thin film portion 27 of the anchoring portion 25 protrudes radially outward as shown in FIG. 9B. The catheter 1 is anchored in the body by the anchoring portion 25.

  Thereafter, when the administration of the medicine by the catheter 1 is completed, when the wire 24 is further pulled toward the proximal end side of the catheter 1, the bulge of the anchoring portion 25 is deformed so as to be inclined toward the distal end side. The movement restriction to the base end side of the plug 23 due to is released. As a result, the plug 23 passes through the internal passage together with the wire 24 and is taken out from the proximal end opening of the catheter 1.

  When the plug 23 and the wire rod 24 are removed from the catheter 1, the anchoring portion 25 of the catheter 1 in the body is elastically restored as shown in FIG. Is moored. As a result, the catheter 1 can be easily pulled out of the body.

  In addition, as shown in FIG. 10, you may make it provide the cover part 11c which covers the front-end | tip part 11 of the plug 23. FIG. By providing the cover portion 11c, the distal end portion 11 is accommodated in the internal passage 14 even when the catheter is in the indwelling state.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. In the first to third embodiments described above, the wire rods 12 and 24 are integrally coupled to the anchor 13 and the plug 23, and the wire rod 17 and the core material 18 are in a coupled state from the beginning via the rotary joint 19. However, in the fourth embodiment, the wire rods corresponding to the wire rods 12, 24, 17 are configured separately, and when the mooring state of the anchoring portions 10, 25 or the protruding portion 16 is generated, the wire rod is connected to the anchor 13, The plug 23 or the core material 18 and the rotary joint 19 are connected to each other.

  For example, when it corresponds to Embodiment 1, as shown to Fig.11 (a), the processus | protrusion 36 extended from the anchor 13 protrudes from the front end surface of the internal channel | path 14 of the catheter 1, and is provided.

  Thereafter, when the catheter 1 is to be anchored in the body, a forceps probe 32 having a forceps 35 at the tip is inserted into the internal passage 14 instead of the wire rod 12, and the forceps 35 has a projection 36 as shown in FIG. By grasping, the forceps probe 32 and the anchor 13 are coupled.

  Thereafter, as in the first embodiment, the forceps probe 32 is pulled toward the proximal end side of the catheter 1 to form a state in which the anchoring portion 10 is raised, whereby the catheter 1 is anchored in the body. Thereafter, when the administration of the medicine by the catheter 1 is completed, as shown in FIG. 11 (d), by pulling the forceps probe 32 further toward the proximal end side of the catheter 1, Inclined to the distal end side, the catheter 1 can be easily pulled out from the body.

  Note that, as described above, the fourth embodiment can be applied to the second and third embodiments by using the wire rods 17 and 24 as the above-described forceps probes. In the above-described fourth embodiment, an example of the connection between the protrusion 36 and the forceps 35 has been shown. However, the present invention is not limited to this. For example, the wire 12, 17, 24, the anchor 13, the core 18 and the rotary joint 19 are used. This can also be realized by a hook with which the plug 23 and the plug 23 are engaged with each other.

  Further, in FIG. 3 (b), the medicine discharge hole 9 → the anchoring portion 10 → the anchor 13 is arranged from the base end side, but this arrangement is arbitrary, for example, as shown in FIG. From the side, the mooring part 10 → the drug discharge hole 9 → the anchor 13 may be arranged in order, or as shown in FIG. 13, the mooring part 10 → the anchor 13 → the drug discharge hole 9 are arranged in order from the base end side. May be.

  By the way, in Embodiment 1-4 mentioned above, although anchoring part 10 was raised using wire rods 12, 17, 24, or forceps probe 32, it is not restricted to this, wire rods 12, 17, 24, or forceps Instead of using the probe 32, for example, as shown in FIG. 14, a configuration in which no wire or the like is provided in the internal passage 14 may be adopted. In this case, the anchoring portion 10 is raised or flattened by relatively expanding and contracting the delivery portion 41 on the proximal end side of the anchoring portion 10 and / or the puncture portion 42 on the distal end side as indicated by arrows. Become.

  In addition, Embodiment 1-4 mentioned above and a modification can be combined suitably.

DESCRIPTION OF SYMBOLS 1 Catheter 2 Tube 3 Drug administration apparatus main body 4 Internal organ 5 Affected part 6 Body surface 7 Stopper 8 Drug administration part 9 Drug discharge hole 10, 25 Anchoring part 11 Tip part 11c Cover part 12, 17, 24 Wire rod 13 Anchor 14 Internal passage 15 , 27 Thin film portion 16 Protruding portion 18 Core material 19 Rotating joint 20 Intermediate stopper 21 Tip stopper 22 Abutting projection 23 Plug 28 Abutting step 32 Forceps probe 35 Forceps 36 Protrusion 41 Delivery portion 42 Puncture portion

Claims (12)

A catheter that guides drugs into the body of mammals, including humans,
A catheter provided with a mooring portion provided on a side surface of the catheter, the shape of which is changed by an operation from outside the body, and mooring the catheter in the body. A tube for guiding the drug into the body;
A drug administration unit provided at the tip of the tube and having at least one drug discharge hole for discharging the drug guided to the tube into the body;
With
The catheter according to claim 1, wherein the mooring part is provided in the drug administration part. The distal end is attached to a predetermined part of the catheter, the proximal end is located outside the body, and includes a wire disposed along the catheter,
The catheter according to claim 1, wherein the shape of the anchoring portion is changed by moving the wire forward or backward with respect to the catheter on the proximal end side from the attachment position of the wire.   The catheter according to claim 3, wherein the wire is a metal wire. The mooring part is provided on the catheter on the proximal side from the attachment position of the wire, and is a flexible part than other parts of the catheter,
By pulling the wire rod toward the proximal end side from the attachment position of the wire rod to the catheter toward the proximal end side, the anchoring portion which is the flexible portion is compressed, and the anchoring portion is out of the diameter 4. The catheter according to claim 3, wherein the catheter is raised in a direction. The mooring part is
A protrusion protruding outward from the catheter;
A core provided inside the protruding portion;
A joint for rotatably attaching the core material to the wire,
With
By pulling the wire rod toward the proximal end side with respect to the catheter on the proximal end side from the attachment position of the wire rod to the catheter, the core member rotates with respect to the wire rod, and the axial direction of the catheter The catheter according to claim 3, wherein an angle formed by a protruding direction of the protruding portion is changed. A tip portion separable into the tip, and
A protrusion provided in the internal passage;
Further comprising
The wire rod has a distal end attached to the distal end portion, passes through an internal passage of the catheter, and a proximal end is located outside the body,
The anchoring portion is provided on the catheter on the proximal side from the protrusion, and is a softer portion than other portions of the catheter,
By pulling the wire rod toward the proximal end side with respect to the catheter, the distal end portion is locked at the protrusion when the distal end portion moves to the proximal end side through an internal passage in the catheter. The catheter according to claim 3, wherein a compression pressure is applied to the anchoring portion which is the flexible portion, and the anchoring portion is protruded in a radially outward direction. The tip is a puncture with a sharp tip,
The structure according to claim 7, wherein the puncture portion of the distal end portion is all accommodated in the internal passage of the catheter in a state where the distal end portion is locked by the protrusion. catheter. It is attached to a predetermined portion of the catheter, and includes a coupled portion that can be coupled or engaged with a wire in the internal passage of the catheter,
The anchoring portion is moved forward or backward with respect to the catheter on the proximal end side by pushing or pulling the wire connected or engaged with the coupled portion toward the proximal end side. 2. The catheter according to claim 1, wherein the shape of the catheter is changed. A delivery part that is closer to the proximal end of the catheter than the anchoring part and delivers a drug toward the distal end of the catheter;
A distal end located on the distal end side of the catheter from the anchoring portion;
Further comprising
The catheter according to claim 1, wherein the shape of the anchoring portion is changed by relatively moving the delivery portion and the distal end portion. A method of inserting a catheter having a wire and a mooring portion protruding to the outer surface by pulling the wire into a living tissue and placing the catheter into a body,
A puncturing step in which the catheter is punctured into the living tissue and the anchoring portion is located in the living tissue in a state where the anchoring portion does not protrude;
A position fixing step of pulling the wire to project the anchoring portion, and fixing the position of the catheter and the living tissue by the anchoring portion;
A method for inserting a catheter into the body, comprising: A catheter having a wire and a mooring portion whose protrusion is reduced from the outer surface by pushing or pulling the wire, wherein the catheter anchored in the living tissue is extracted from the living tissue by a method of extracting from the body There,
An anchoring reduction step of pressing the proximal end of the catheter and pushing or pulling the wire to reduce protrusion from the outer surface of the anchoring portion;
An extraction step of extracting the catheter from the living tissue;
A method for withdrawing a catheter from the body, comprising:

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