JPH0591684U - Pericardial drain catheter - Google Patents

Abstract

(57) [Summary] [Constitution] In a pericardial drain catheter comprising an inner member made of an elongated tubular body and an outer member made of a tubular body slidably inserted therein, The tip is closed and is arranged so as to project from the tip of the outer member,
In addition, at least one small hole is provided on the side surface that slides with the inner surface of the outer member, and the anticoagulant liquid is exuded from the small hole so that the inner member can be slidably moved in the axial direction. In the pericardial drain catheter, the body fluid does not enter the gap between the inner tubular body and the outer tubular body and the sliding of the tubular bodies does not become difficult. [Effect] The body fluid accumulated in the pericardium can be drained at appropriate times while observing the post-operative course, so that the body fluid is not drained more than necessary and the balance in the body is not disturbed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pericardial drain catheter for draining excess fluid accumulated in the pericardium to the outside of the body by cardiac surgery.

[0002]

[Prior Art]

 In cardiac surgery, if the postoperative course is good, the fluid exuding from the surgical site will be absorbed into the body in a balanced manner and healed, but if the fluid exuding from the surgical site is excessive, it will be excessive. Fluid may accumulate in the pericardial sac, a membranous sac that wraps the heart, compressing the heart and inhibiting its function. When excess body fluid accumulates in the pericardium in this manner, conventionally, while searching with an ultrasonic echo, a tracar needle is inserted into the pericardium to remove the body fluid accumulated in the pericardium from the outside of the body. Had been discharged. In addition, in the worst case, the patient may have to perform a thoracotomy operation again, and there is a problem that the patient has to recover while suffering mental and physical pain. In order to solve this problem, a catheter is placed in the pericardium in advance during heart surgery, and the fluid that drains from the pericardium during surgery or that exudes from the pericardium after surgery is discharged to the outside of the body. Is introduced in Japanese Examined Patent Publication No. 49-15435. This catheter has multiple sets of ridges at the closed end of the tube and an opening between the ridges of each set. A ridge is provided to prevent it from becoming difficult to get caught. In addition, the catheter has a flexible core tube inserted inside the tube to prevent the catheter from squatting.

[0003]

[Problems to be solved by the device]

 However, this catheter is still in the pericardium after surgery and discharges the body fluid exuding from the pericardium without interruption, so there is a risk of draining body fluid even if the healing situation is good. When the catheter is left in the body for a long time after the operation, the body fluid enters between the outer wall of the core tube and the inner wall of the tube due to the capillary phenomenon, and the protein coagulates to make the tube flexible. May be impaired. An object of the present invention is to provide a pericardial drain catheter capable of draining body fluid accumulated in the pericardium in a timely manner and smoothly sliding the inner tubular body as needed while observing the postoperative course. Is.

[0004]

[Means for Solving the Problems]

 That is, the present invention is a pericardial drain catheter comprising an inner member made of an elongated tubular body and an outer member made of a tubular body slidably inserted therein, and the distal end portion of the inner member is closed. At least one small hole is provided on the side surface of the outer member that projects from the tip of the outer member and slides on the inner surface of the outer member. It is a pericardial drain catheter formed so as to be slidably movable in any direction. Further, the present invention is the pericardial drain catheter, wherein a pericardium having an inner diameter larger than a position sliding on the outer surface of the inner member is provided on the opposite side of the distal end of the outer member. It is a drain catheter. Further, in the present invention, in the pericardial drain catheter, an inner member that is slidably movable in the axial direction penetrates the base end portion, and body fluid is discharged from the contact surface between the outer surface of the inner member and the inner surface of the base end portion. The pericardial drain catheter is provided with a check valve inside the proximal end so as to prevent leakage.

[0005]

[Action]

 In the pericardial drain catheter of the present invention, the distal end of the catheter is inserted into the pericardium, for example, through the puncture opening under the ribs, and the inner and outer members of the catheter are left in the pericardium. Then, when excess fluid accumulates in the pericardium, the excess fluid is stored in the proximal portion through the inside of the outer member by sliding the inner member toward the proximal portion of the catheter. .. A check valve is provided at the proximal end to prevent body fluid in the proximal end from flowing backward toward the distal end of the catheter. In addition, the anticoagulant liquid is seeping out from the small holes of the inner member, and the body fluid enters the gap between the outer surface of the inner member and the inner surface of the outer member to coagulate the protein and prevent the inner member from sliding. Is being prevented.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view of the pericardial drain catheter of the present invention. In the figure, 1 is an inner member, 2 is an outer member, 3 is a base end portion, 4 is a tip end portion, 5 is a small hole, 6 is a body fluid discharge port, 7 is a contact surface between the inner member and the base end portion, and 8 is a reverse. Indicates a stop valve. The pericardial drain catheter of the present invention comprises an inner member 1 made of an elongated tubular body and an outer member 2 made of a tubular body into which the inner member is slidably inserted. The tip 4 of the inner member 1 is closed and closed. The closed end shape of the inner member 1 is preferably spherical and smooth so as not to damage the pericardium and other organs. The tip 4 of the inner member 1 is arranged so as to project more than the tip 4 of the outer member 2 when it is inserted into the pericardium during a cardiac surgery. At least one small hole 5 is provided at a position where the tip side surface of the inner member 1 slides on the inner surface of the outer member 2. The anticoagulant liquid is exuded from the small hole 5 and is arranged so that the inner member 1 can be slidably moved in the axial direction. Examples of the anticoagulant liquid include liquids containing heparin, chondroitin sulfate, dextran sulfate, urokinase, TPA and the like.

Examples of the material of the inner member 1 and the outer member 2 include polyvinyl chloride, polyurethane, fluororesin, polyolefin, silicone resin and the like, and antithrombogenic resin is particularly preferable. The distal end portion 4 of the outer member 2 is opened, and when it is inserted into the pericardium during heart surgery, the tip of the outer member 2 is also inserted so as to be left in the pericardium. The inner member 1 is inserted inside the outer member 2. The outer surface of the inner member 1 and the inner surface of the outer member 2 are substantially in close contact with each other such that the anticoagulant liquid oozes out from the small holes 5 of the inner member 1 to moisten the surfaces of both members. On the opposite side of the tip portion 4 of the outer member 2, a base end portion 3 composed of a chamber having a larger inner diameter at a position where the outer member 2 slides on the outer surface is installed. The proximal end portion 3 is a chamber in which the body fluid accumulated in the pericardium is taken out and temporarily stored by moving the inner member 1 in the direction opposite to the distal end portion 4 of the catheter. The body fluid accumulated in the proximal portion 3 is discharged from the discharge port 6. In order to prevent the accumulated body fluid from leaking from the contact surface 7 between the inner member 1 and the base end portion 3 at the base end portion 3, a check valve 8 is provided inside the base end portion 3 in the vicinity of the contact surface 7. It is provided in. As the check valve, normally used check valves such as duck bill valve, umbrella valve, flap valve, poppet valve and ball valve are used.

The pericardial drain catheter of the present invention is inserted into the body through, for example, a subcostal puncture opening during cardiac surgery, and the tip 4 of the catheter is left in the pericardium even after the cardiac surgery. .. When excess body fluid accumulates in the pericardium and presses the heart, the inner member 1 is moved toward the proximal end portion 3 to suck the body fluid in the pericardium into the outer member 2. The body fluid is stored in the base end portion 3 at one end and discharged from the discharge port 6.

[0009]

[Effect of the device]

 Since the pericardial drain catheter of the present invention can drain the body fluid accumulated in the pericardium in a timely manner while monitoring the postoperative process, the body fluid is not discharged more than necessary and the balance in the body is not lost. In addition, since the anticoagulant liquid oozes out from the small hole at the tip of the inner tubular body, the body fluid enters the gap between the inner tubular body and the outer tubular body and the sliding of both tubular bodies is prevented. It won't be difficult.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a pericardial drain catheter of the present invention.

[Explanation of symbols]

 1 Inner member 2 Outer member 3 Base part 4 Tip part 5 Small hole 6 Discharge port 7 Contact surface 8 Check valve

Claims (3)

[Scope of utility model registration request] 1. A pericardial drain catheter comprising an inner member made of an elongated tubular body and an outer member made of a tubular body in which the inner member is slidably inserted, and the distal end portion of the inner member is closed. At least one small hole is provided on the side surface of the outer member protruding from the tip of the outer member and sliding on the inner surface of the outer member, and the anticoagulant liquid seeps out from the small hole to axially move the inner member. A pericardial drain catheter formed so as to be slidable on the inside. 2. The pericardial drain catheter according to claim 1, wherein the outer member is provided with a proximal end portion having an inner diameter larger than a position where it slides on the outer surface of the inner member, on the side opposite to the distal end portion. . 3. An inner member, which is slidably movable in the axial direction, penetrates through the base end portion, and the inside surface of the inner member is reversely connected to the inner surface of the inner member so as to prevent leakage of body fluid. The pericardial drain catheter according to claim 2, wherein a stop valve is provided.