JP2011010834A - Catheter and medicine supply/body fluid suction system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress infectious diseases, to minimize influences of biological vibration and body movements, and to stably indwell the catheter in-vivo when dwelling in-vivo.SOLUTION: The tube-type catheter 1 having an inner channel 2a and at least one opening part 3b linked to the inner channel 2a includes: an insertion part 3 which is provided on a tip side of the catheter 1 and inserted in an affected part 12; and a puncture part 4 which is provided at a distal end side of the catheter 1 and punctured from the body cavity side toward the outside of the body. A diameter of the puncture part 4 is larger toward a base part of the puncture part 4 from the tip of the puncture part 4.

Description

  The present invention relates to a catheter that is inserted into a living body of a mammal including human beings and is indwelled, injecting a drug or the like into an affected area, or sucking a body fluid containing unnecessary pus from the affected area, and a drug supply / body fluid using the catheter It relates to a suction system.

  2. Description of the Related Art Conventionally, a catheter inserted into a mammal including a human has a pointed distal end on the affected area in order to place the insertion portion at a desired position when performing a surgical procedure. For this reason, in order to reduce the risk of damage to nerves or the like concentrated on the dorsal side, the catheter is often placed by incising the ventral side.

Japanese Patent No. 3274384

  By the way, when the catheter is inserted into the body cavity through the skin from outside the body, resident bacteria etc. present in the skin may adhere to the insertion part of the catheter and cause infection by entering the body cavity. . In particular, in the case of a patient having a disease such as a cancer patient, the immunity is often lowered, and the risk of infectious disease becomes higher.

  In addition, when inserting a catheter from outside the body to an affected area where other organs or organs are densely located or deep, particularly an affected area such as a dorsal organ, the abdomen is often incised, inevitably The distance between the incision and the incision becomes longer. For this reason, the indwelling catheter may receive the influence of the biological vibration and body movement by respiration, pulsation, etc., and position shift etc. may occur.

  The present invention has been made in view of the above, and suppresses the occurrence of infectious diseases when the catheter is indwelled in the body, and stably suppresses the influence of biological vibration and body movement in the body. It is an object of the present invention to provide a catheter that can be placed and a drug supply / fluid suction system using the catheter.

  In order to solve the above-described problems and achieve the object, a catheter according to the present invention is a tube-shaped catheter having an internal channel and at least one opening communicating with the internal channel, and is provided on the distal side of the catheter. An insertion portion that is provided and inserted into the affected area; and a puncture portion that is provided on the proximal end side of the catheter and punctures epithelial tissue and / or muscle tissue from the body cavity side toward the external space or the internal space of the luminal organ, The diameter of the puncture portion is increased from the tip of the puncture portion toward the base of the puncture portion.

  In the catheter according to the present invention as set forth in the invention described above, the diameter of the puncture portion is intermittently increased from the distal end of the puncture portion toward the base portion of the puncture portion.

  In the catheter according to the present invention as set forth in the invention described above, the diameter of the puncture portion is continuously increased from the distal end of the puncture portion toward the base portion of the puncture portion.

  The catheter according to the present invention is characterized in that, in the above-mentioned invention, the central portion of the catheter has a spiral shape that expands and contracts.

  In the catheter according to the present invention as set forth in the invention described above, the puncture portion has a curved shape.

  The catheter according to the present invention has a puncture / insertion portion in which the puncture portion and the distal end portion of the insertion portion are integrated in the above-described invention, and the puncture / insertion portion is inserted into the internal channel. The distal end portion is pulled out from the proximal end side of the catheter by pulling out from the puncture portion side.

  In the catheter according to the present invention as set forth in the invention described above, the insertion portion has a spiral shape.

  In the above invention, the catheter according to the present invention is characterized in that a structure capable of cutting and removing the puncture portion is provided on the base side of the puncture portion.

  The catheter according to the present invention is characterized in that, in the above invention, the catheter has a protective cover that covers the insertion portion including the opening, and the protective cover is detachable.

  Further, the catheter according to the present invention is characterized in that, in the above invention, a fixing portion having a width wider than the diameter of the catheter is provided on the proximal end side of the insertion portion and / or the proximal end side of the puncture portion. To do.

  The drug supply / fluid suction system according to the present invention is a tube-shaped catheter having an internal channel and at least one opening communicating with the internal channel, and is provided on the distal end side of the catheter and inserted into an affected area. An insertion portion, and a puncture portion that is provided on the proximal end side of the catheter and punctures epithelial tissue and / or muscle tissue from the body cavity side toward the internal space of the extracorporeal or luminal organ, and the diameter of the puncture portion is A first portion for connecting to a catheter different from the catheter after the puncture portion is removed from the proximal end portion of the puncture portion, which is formed from the distal end of the puncture portion to the base portion of the puncture portion. A catheter having a connector and the another catheter having a second connector for connecting to the first connector are connected, and the first connector and the first connector are connected. And a medicine supply / body fluid suction device that supplies medicine and / or sucks body fluid containing pus while the two connectors are connected.

  According to the present invention, when the catheter is indwelled in the body, the insertion part and the puncture part are provided at both ends of the catheter, the insertion part is inserted into the affected part, and the puncture part is outside the body or inside the luminal organ from the body cavity side. Since it is punctured toward the space, it can be stably placed in the body while suppressing the occurrence of infectious diseases and minimizing the effects of biological vibration and body movement.

FIG. 1 is a perspective view schematically showing the configuration of a catheter according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view schematically showing the configuration of the catheter shown in FIG. FIG. 3 is a schematic diagram showing a configuration of a medicine supply / body fluid suction system using the catheter shown in FIG. FIG. 4 is a diagram showing a modification of the puncture unit shown in FIG. FIG. 5 is a diagram showing a modification of the puncture unit shown in FIG. FIG. 6 is a diagram showing a modification of the puncture unit shown in FIG. FIG. 7 is a view showing a modification of the puncture unit shown in FIG. FIG. 8 is a diagram showing a modification of the puncture unit shown in FIG. FIG. 9 is a flowchart showing a procedure for placing the catheter in the body. FIG. 10 is a perspective view schematically showing the structure of the catheter according to the second embodiment of the present invention. FIG. 11 is a sectional view schematically showing the structure of the catheter according to the third embodiment of the present invention. FIG. 12 is a perspective view schematically showing the structure of the insertion portion of the catheter according to the fourth embodiment of the present invention. FIG. 13 is a cross-sectional view schematically showing the structure of the insertion portion of the catheter according to the fifth embodiment of the present invention.

  Hereinafter, with reference to the drawings, a catheter which is a form for carrying out the present invention and a medicine supply / body fluid suction system using the same will be described. In this embodiment, the outside of the body is described as an example of the region (external body, digestive tract cavity, vaginal cavity, uterine cavity, etc.) separated by epithelial tissue and / or muscle tissue.

(Embodiment 1)
FIG. 1 is a perspective view schematically showing the configuration of a catheter according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view schematically showing the configuration of the catheter shown in FIG. The catheter 1 has a tubular catheter body 2 in which an internal channel 2a is formed. Provided on the distal end side (inner body direction side) of the catheter body 2 is a distal end portion 3a having a pointed distal end and a proximal end side (outside body side) of the distal end portion 3a, and communicates the internal channel 2a with the outside of the catheter 1. It has the insertion part 3 provided with the 1 or more opening part 3b to be made. On the other hand, the proximal end side of the catheter body 2 has a puncture portion 4 with a sharp tip.

  The catheter 1 is punctured into the organ 11 having the affected part 12 with the insertion part 3 in a state where the abdomen is incised. And the insertion part 3 will be in the state inserted in the affected part 12. FIG. Here, the distal end side of the catheter body 2 has a fixing portion 5 that is wide in the radial direction and is realized by a plate, a flange, or the like. The position of the fixing portion 5 with respect to the catheter body 2 can be adjusted so as to maintain the insertion portion 3 inserted in the affected area 12 at an appropriate depth, and is adjusted to a state in contact with the surface of the organ 11. Thus, the insertion portion 3 is stably fixed.

  On the other hand, the puncture unit 4 projects outside the body by puncturing and penetrating the skin 13 from the inside of the body. For example, when the surgeon returns the skin 13 lifted in the abdominal incision to the original position and closes the incision, the puncture unit 4 punctures and penetrates the skin 13 from the inside of the body. Here, the proximal end side of the catheter body 2 has a fixing portion 6 similar to the fixing portion 5, and this fixing portion 6 is realized by a plate, a flange or the like. For example, it contacts the epithelial tissue or muscle tissue, and the protruding state of the puncture unit 4 outside the body is stably fixed. The fixing portion 6 prevents the catheter 1 from being pulled out of the body and prevents the insertion portion 3 from coming out of the affected area 12. The fixing portions 5 and 6 may be fixed to the organ 11 and the skin 13 by sewing.

  Note that the insertion portion 3 and the catheter body 2 may be fixed so as to change the friction coefficient by applying an uneven coating on the surfaces thereof. Further, by reducing the cross-sectional diameter of the base portion side of the insertion portion 3 and increasing the cross-sectional diameter of the central portion of the insertion portion 3, the insertion portion 3 is difficult to be removed from the affected portion 12 after the insertion portion 3 is inserted into the affected portion 12. You may make it do. Similarly, by reducing the cross-sectional diameter of the base side of the puncture part 4 and increasing the cross-sectional diameter of the central part of the puncture part 4, the catheter 1 is more than necessary outside the body after the puncture part 4 penetrates the skin 13. You may make it not be pulled out.

  The entire catheter 1 is realized by a biocompatible material, for example, polyurethane, elastic silicon, fluororesin, polyvinyl chloride, polyethylene, etc., so that contact with other organs can be avoided as much as possible as shown in FIG. Can be bent easily.

  As shown in FIG. 3, the puncture unit 4 can be easily cut and removed at the position indicated by the breaking line L1. For example, the member at the position indicated by the breaking line L1 is formed of a fragile material so that the puncture portion 4 can be easily folded. Alternatively, the puncture portion 4 may be easily folded by making the aperture at the position indicated by the breaking line L1 smaller than the aperture of other portions. By doing so, the puncture unit 4 can easily fold the puncture unit 4 outside the body in a state where the puncture unit 4 is fixed after protruding from the skin 13 to the outside of the body.

  Here, it has the connector 22 by which the convex part 20 was formed in the outer surface of the proximal end front-end | tip part of the catheter main body 2 from which the puncture part 4 was removed. On the other hand, the distal end portion of the catheter 30 connected to the catheter 1 outside the body has a connector 23 in which a concave portion 21 that engages with the convex portion 20 is formed in the internal channel, and the catheter 1 from which the puncture portion 4 has been removed. And the catheter 30 form a connector structure 24 that allows the connector 22 and the connector 23 to be connected outside the body. The other end of the catheter 30 is connected to the drug supply / body fluid suction device 31 via the connector 25.

  As shown in FIG. 3, the connector 22 and the connector 23 are connected when the connector 23 is extrapolated to the connector 22, and the internal channels of the catheter 1 and the catheter 30 communicate with each other. The drug supply / body fluid suction device 31 supplies a drug or the like to the affected part 12 through the internal channel and the opening 3 b that communicate with each other, or sucks a body fluid or the like containing pus from the affected part 12. In a state where the connector 22 and the connector 23 are connected, the medicine supply / body fluid suction system is configured.

  In the connector structure 24 described above, the convex portion 20 is provided in the connector 22 and the concave portion 21 is provided in the connector 23. However, it is sufficient that the catheter 1 and the catheter 30 can be connected with the puncture portion 4 removed. For example, a structure that is screwed together may be used.

  By the way, the puncture part 4 is made into the taper shape from which a diameter becomes large toward a base part from a front-end | tip. That is, the distal end of the puncture portion 4 is sharp, and is a tapered portion whose diameter increases from the sharp distal end toward the proximal end of the puncture portion 4. It is the same as the diameter. For example, as shown in FIGS. 4 to 7, the shape of the portion where the diameter increases may be various shapes that continuously or intermittently increase in thickness from the distal end of the puncture portion 4 toward the base portion. By making the puncture portion 4 in such a shape, when penetrating the portion 4 through the tissue of the skin 13 from the body cavity, the diameter of the hole due to penetration is reduced while minimizing unnecessary pain and bleeding. Can be expanded to the same diameter. With this shape, the catheter body 2 can be punctured from the body and guided outside the body.

  In addition, the puncture part 4 is good also as a curved shape, as shown in FIG. The puncture unit 4 punctures the inside of the skin 13 from inside the body cavity in the opened state, but there are cases where it is difficult to sufficiently confirm the puncture position inside the skin 13 visually. Even in such a case, it becomes easy to puncture the inside of the skin 13.

  Here, a procedure for placing the catheter 1 in the body will be described with reference to a flowchart shown in FIG. First, the surgeon incises the abdomen of the patient (step S101). Thereafter, the skin 13 is lifted and the catheter 1 is inserted into the body (step S102). Furthermore, the insertion part 3 of the catheter 1 is inserted and fixed in the organ 11 having the affected part 12 which is a target for drug administration or the like (step S103). This fixing is preferably performed using the fixing portion 5 described above. Thereafter, the puncture portion 4 is punctured from the inside of the skin 13 and taken into consideration outside the body while taking care not to damage other organs or organs (step S104). This fixing is preferably performed using the fixing portion 6 described above. Thereafter, the incised portion is sutured (step S105), a connection process with another catheter 30 outside the body is performed (step S106), and this process ends.

  By the way, in the case of placing this catheter in the body, after inserting the distal end of the catheter from the incision portion and inserting the insertion portion of the distal end into the affected portion, the proximal end portion is left out of the incision portion. It was. In this conventional catheter, the proximal end portion does not necessarily have a puncture shape, and thus there has been no catheter having a sharp proximal end portion in conventional placement catheters. When performing surgery with such a conventional catheter, there was no problem if the affected part was near the incision, but when placing the catheter in the deep part, particularly the affected part existing on the back side, from the incision to the affected part. If there is a long distance or if there are many organs or organs in the middle, it is difficult to crawl, preventing contact with other organs or organs, In some cases, it was difficult to place the catheter in a state where the effects of the above were sufficiently eliminated. In addition, when another catheter is inserted into the body cavity by penetrating the skin from outside the body, resident bacteria etc. existing in the skin may adhere to the insertion part and cause infection in the affected part when the insertion part is inserted into the affected part There was sex.

  In contrast, in the first embodiment, the catheter 1 is inserted from the incision portion by newly providing a puncture portion 4 for penetrating the epithelial tissue or muscle tissue of the skin 13 on the proximal end side of the catheter 1. Then, after inserting the insertion part 3 into the affected part 12, an optimum place is selected from the side of the body cavity, and the puncture part 4 is inserted into the epithelial tissue or muscle tissue inside the skin 13, from which the catheter 1 is guided outside the body. ing. For example, when piercing the skin 13, the puncture part 4 is cut outside the body, removed, removed, etc., and then connected to another catheter 30 by the connector structure 24. When the puncture unit 4 is punctured to a digestive tract such as the stomach or the uterus, another catheter 30 or the like inserted from the incision portion is connected to the puncture unit 4 in the body cavity, or viewed from the natural opening of the living body. After inserting a mirror or another catheter 30 and cutting, removing, or removing the puncture portion 4 using an endoscope, another catheter 30 can be connected. In any case, since the catheter 1 is not inserted into the body cavity through the skin 13 from outside the body, there is no need to worry about the effects of resident bacteria etc. existing in the skin 13, and depending on the position of the incision. In addition, since the puncture can be performed at an optimum position in the body cavity, the catheter 1 can be stably placed on the affected area with minimal influence of biological vibration and body movement. Furthermore, when the puncture unit 4 is guided through the body cavity to the outside of the body, various tissues can be confirmed and punctured from the body cavity side. The puncture unit 4 can be guided out of the body from the skin 13 on the back side or body cavity side. In other words, since the optimal position for guiding the catheter 1 outside the body can be selected from the body cavity side regardless of the incision site, the catheter 1 can be placed while minimizing damage to the living body. Become.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. FIG. 10 is a perspective view schematically showing the structure of the catheter according to the second embodiment of the present invention. As shown in FIG. 10, this catheter 101 has a spiral portion 102 in which a part or all of the catheter main body 2 between the insertion portion 3 and the puncture portion 4 is formed in a spiral shape. As a result, in addition to the original bending movement of the catheter 101, the movement of expanding and contracting in the longitudinal direction of the catheter 101 is added, so that the catheter 101 can be easily handled during the operation, and the catheter 101 is vibrated after the operation. It can be placed in the body more stably regardless of body movement.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. FIG. 11 is a sectional view schematically showing the structure of the catheter according to the third embodiment of the present invention. As shown in FIG. 11, this catheter 201 has a puncture / insertion portion 210 in which the puncture portion 4 and the distal end portion 3 a of the insertion portion 3 are integrally formed, and one end of the insertion portion 3 is disposed on the distal end side of the catheter main body 202. The opening which is a part is provided. The puncture / insertion unit 210 is inserted into the internal channel of the catheter body 202. After the puncture unit 4 is punctured into the epithelial tissue or muscle tissue of the skin 13, the puncture unit 4 is pulled out, so that the distal end portion 3a of the insertion unit 3 is removed from the body while the catheter body 202 remains in place in the affected area 12. Can be removed. This is an effective configuration in the case where the tip portion 3a is made of metal and the tip portion 3a is ionized and harmful to a living body by continuing to leave the tip portion 3a in the body.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. FIG. 12 is a perspective view schematically showing the structure of the insertion portion of the catheter according to the fourth embodiment of the present invention. As shown in FIG. 12, the insertion portion 303 of the catheter 301 has a spiral shape. By making the insertion portion 303 into a spiral shape, when the insertion portion 303 is inserted into the organ 11, pressure applied to the organ 11 is relieved, so that the insertion portion 303 is prevented from penetrating the organ during the operation. Can do. Further, depending on the shape of the affected part 12, it becomes possible to supply a medicine or the like more effectively than the linear insertion part 3, or to suck a body fluid or the like containing pus. In FIG. 12, the openings 3 b are evenly arranged along the spiral on the side surface of the insertion portion 303. However, the present invention is not limited to this, and the position, quantity, shape, and caliber are matched to the shape of the affected part 12. Various patterns are possible. For example, by arranging the opening 3b toward the central axis of the spiral, it is possible to supply the drug intensively to the affected part located on the central axis of the spiral.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described. FIG. 13 is a cross-sectional view schematically showing the structure of the insertion portion of the catheter according to the fifth embodiment of the present invention. As shown in FIG. 13, the insertion portion 403 of the catheter 401 includes a removable protective cover 400 that covers the opening including the opening. For example, as shown in FIG. 13, the protective cover 400 is removed from the distal end side of the catheter 401 after passing the catheter 401 through the other organ 14, and the protective cover 400 is removed from the affected part 11 in a state where the protective cover 400 is removed. The insertion unit 403 is inserted. In the fifth embodiment, when the protective cover 400 is attached to the insertion part 403, the affected part 12 exists deep inside the organ 11, or the insertion part 403 needs to penetrate the organ 11 or the affected part 12. The opening can be protected from contamination until the insertion part 403 reaches the affected part 12.

DESCRIPTION OF SYMBOLS 1,30,101,201,301,401 Catheter 2,202 Catheter body 2a Internal channel 3,303,403 Insertion part 3a Tip part 3b Opening part 4 Puncture part 5,6 Fixing part 11,14 Organ 12 Affected part 13 Skin 20 Convex part 21 Concave part 22, 23, 25 Connector 24 Connector structure 31 Drug supply / body fluid suction device 102 Spiral part 201 Puncture / insertion part 400 Protective cover

Claims (11)

A tubular catheter having an internal channel and at least one opening leading to the internal channel,
An insertion portion provided on the distal end side of the catheter and inserted into an affected area, and an epithelial tissue and / or muscle tissue is punctured from the body cavity side toward the external space or the internal space of the luminal organ provided on the proximal end side of the catheter A catheter having a puncture portion, wherein a diameter of the puncture portion is increased from a distal end of the puncture portion toward a base portion of the puncture portion.   The catheter according to claim 1, wherein a diameter of the puncture portion is intermittently increased from a distal end of the puncture portion toward a base portion of the puncture portion.   The catheter according to claim 1, wherein a diameter of the puncture portion is continuously increased from a distal end of the puncture portion toward a base portion of the puncture portion.   The catheter according to any one of claims 1 to 3, wherein the central portion of the catheter has a spiral shape that expands and contracts.   The catheter according to any one of claims 1 to 3, wherein the puncture portion has a curved shape.   A puncture / insertion portion in which the puncture portion and the distal end portion of the insertion portion are integrated, and the puncture / insertion portion is inserted through the internal channel and pulled out from the puncture portion side to remove the distal end portion. The catheter according to any one of claims 1 to 3, wherein the catheter is pulled out from a proximal end side of the catheter.   The catheter according to any one of claims 1 to 3, wherein the insertion portion has a spiral shape.   The catheter according to any one of claims 1 to 3, wherein a structure capable of cutting and removing the puncture portion is provided on the base side of the puncture portion.   It has a protective cover which covers the said insertion part containing the said opening part, The said protective cover is detachable, The catheter as described in any one of Claims 1-3 characterized by the above-mentioned.   The fixing portion having a width wider than the diameter of the catheter is provided on a proximal end side of the insertion portion and / or a proximal end side of the puncture portion. catheter. A tube-shaped catheter having an internal channel and at least one opening communicating with the internal channel, the insertion portion being provided at the distal end side of the catheter and inserted into the affected area, and the body cavity being provided at the proximal end side of the catheter A puncture portion that punctures epithelial tissue and / or muscle tissue from the side toward the internal space of the body organ or luminal organ, and the diameter of the puncture portion is from the tip of the puncture portion toward the base of the puncture portion A catheter having a first connector for connecting to a catheter different from the catheter after the puncture portion is removed at a proximal end portion of the puncture portion;
In the state where the second catheter having the second connector for connecting to the first connector is connected and the first connector and the second connector are connected, the supply of medicine and / or A drug supply / fluid suction device for aspiration of fluid containing pus;
A drug supply / fluid suction system comprising:

Images