JPS6040857B2 - Elastic suture/ligature - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a comprehensive connecting thread for use in tobacco suturing or long-term striping of blood vessels, and its purpose is to connect catheters, tubes, etc. inserted into various organs of the living body. To provide a suture and a thread that can prevent the contents of an organ from gushing out from the removed part even if the organ is removed.

In addition, elastic suture threads are more likely to damage living tissue. In heart surgery, several pressure measurement catheters are often inserted into the ventricles and/or atria in order to check the state of healing and recovery after surgery.

This catheter is inserted directly into the lumen through the ventricular wall, atrium wall, brachial artery wall, etc. The area around this insertion site is used to secure the catheter, and when the catheter is removed, the tissue in that area instantly contracts inside. In order to close the wound and prevent bleeding, concentric sutures are placed on the catheter so that force is applied inward. Figures 1 and 2 are for explaining this. Figure 1 is an explanatory diagram showing the catheter insertion situation, and Figure 2 is an explanatory diagram showing the catheter insertion situation.
This is an enlarged explanatory view of the tobacco suture portion shown in the figure, in which 1 indicates a catheter for measuring the membrane, 2 indicates an atrial muscle, 3 indicates an insertion port, and 4 indicates a tobacco suture thread. Also, for patients who develop irregularities,
Base maker treatment is performed, but in order to do this, a base maker electrode must be attached to the endocardium and a pulsed current must be applied from an external power source through an insulated wire inserted into the blood vessel.

To insert the electric wire in this case, for example, as shown in the explanatory diagram of the endocardial electrode wire insertion situation in Figure 3, the skin layer 6 is incised to expose the vein, and the vein is first placed in a striped bag 4' to stop the blood circulation. Then, the cord 1, which contains the base maker electrode 7, is incised through the venous arm in a part closer to the heart than the striped connection part 4'.
′ is inserted into the endocardium and basing is performed. After that, the cord is fixed by tightening the cord at the part closer to the heart than the part where the cord is inserted into the blood vessel.The number 6 indicates the suture thread at the skin incision. There are various types of suture threads, but they are all ordinary surgical suture threads and tying threads that have great strength but have little elongation.Therefore, especially in tobacco sutures, pressure is likely to be applied to the center. When the catheter or cord is removed when the patient's condition improves and stabilizes, the pressure and myocardial force are used to immediately close the wound. The technique is extremely difficult and it is difficult to prevent troubles caused by bleeding, and great care and skill are required to stop the bleeding.In the case of venous trachea, the blood pressure is low, so the base maker electrode must be removed from the 4'' part of the venous trachea. There is no need to worry about a major accident, but since the closure of blood vessel wounds relies solely on its elasticity, bleeding is inevitable, and blood troughs often form at the base maker electrode insertion site. It should be noted that the present invention relates to a suture thread "striped yarn" created to eliminate the above-mentioned concerns, and therefore, the explanation with the above-mentioned figures is only made for the purpose of better understanding of the present invention. It will be readily understood that the application of the present invention is not limited to these two surgical cases, but can be used for any surgery for the same purpose.

Now, the present inventor conducted an animal experiment using rubber thread (cut rubber band) based on the assumption that complete hemostasis would be possible if the tobacco suture was performed using elastic thread, and found that complete hemostasis was achieved. succeeded in. In addition, surgical sutures used to be non-stretchable, but it has been found that stretchable sutures are less likely to damage living tissue. However, rubber thread has too high a rate of expansion and contraction, and since it does not have a thread-like structure, it has problems with strength and adverse effects on living organisms, so it cannot be used for the human body. The present inventors have discovered that the fibers have no adverse effects on living organisms, have high strength, and that the rate of expansion and contraction of the threads during surgery is neither extremely large nor extremely small, and is at a level that does not interfere with operation. It was possible to obtain sutures and threads without elastic fatigue.As a result of the study, the present invention was obtained. Nylon fishing line has a certain degree of elasticity.

This is obtained by fully stretching an unstretched nylon filament and then heat-setting the filament in a slightly contracted state. The unit fibers of the yarn of the present invention can be manufactured using the same principle. That is, when a non-stretched spun yarn is sufficiently stretched, then shrunk to 1/2 and heat set, a single fiber yarn with an expansion/contraction ratio of slightly less than 100% can be obtained.

If it is shortened to 1'3, the expansion/contraction ratio will be less than 150%.

Such a nylon stretchable thread has considerably high strength and exhibits sufficient elastic contraction near body temperature. Therefore, if this single fiber is twisted alone or together with a known urethane shrinkable thread having a higher shrinkage property, or it is made into fibers and spun, the suture or knotted thread desired in the present invention can be obtained. Since it is thermoplastic, it can be easily tied to a suture needle.

Although elastic yarns can be manufactured from vinyl chloride, etc., this resin is not suitable for the purpose of the present invention because stabilizers and plasticizers are usually added to this resin. Suitable materials include polyester without nylon additives, urethane rubber, silicone rubber, and the like. In the case of polyurethane rubber, 250% to 450% single fibers can be obtained by heat setting in the same manner as with nylon. Next, properties of suitable suture threads will be illustrated.

Nylon fiber (stretch rate 120%) 7 skin t% Urethane rubber fiber (stretch rate 250%) 30 wt% or more diameter 0.1~2. Misaki blended yarn (stretch rate approx. 1
00%)

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the catheter insertion situation, FIG. 2 is an explanatory diagram for explaining this, and FIG. 3 is an explanatory diagram for inserting an endocardial electrode wire. 1... Catheter for pressure measurement, 1'... Cord, 2...
...Atrial wall, 2'...Vein, 3...Insertion port, 4...
・Suture thread, 4', 4''...Tethering thread, 5...Skin, 6
... Suture thread, 7... Base maker electrode. Figure 3 Special Figure 1 Figure 2

Claims (1)

[Claims] 1. A surgical suture ligature that has elasticity of 100 to 450% near body temperature and is made of a nylon elastic thread, a polyurethane rubber elastic thread, or a blend thereof that does not contain components that adversely affect living organisms. .