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Medical suture friction performance testing apparatus and testing method thereof

A friction performance and testing device technology, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems of high cost, little difference in yarn friction coefficient, and complicated experiments, and achieve simple structure and improve reproducibility. Effect

Inactive Publication Date: 2014-07-16
DONGHUA UNIV +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The latter refers to the force required for medical sutures to slide against each other, and its size affects the difficulty of knotting, especially for surgical knots, three frictional contact surfaces are generated at the first node. The mutual friction between the sutures is large, and it is difficult for the medical sutures to slide each other when knotting, which is inconvenient for knotting and affects its operating feel.
[0003] Through the review of a large number of documents and materials, it is found that although there are corresponding instruments and test methods for the friction properties of fabric yarns and industrial ropes at home and abroad, the test devices and methods involved are not well applicable to the friction of medical sutures. Performance Testing
The results of the friction performance of fabric yarns are as follows, for example (1) the friction coefficient is usually used to measure the friction performance of fabric yarns, and most instruments use a skein simulation device to test the friction coefficient between yarns, or a capstan simulation device Test the friction performance between the yarn and the metal disc. The former mainly evaluates the properties of the yarn itself for fabrics, and the latter mainly evaluates the friction between the yarn and the machine during the manufacturing process, but only in one of the ways Test, and when evaluated by the friction coefficient, often can get the result that the friction coefficient difference of two kinds of yarns with large friction performance difference is not big, it is difficult to directly reflect the yarn friction performance difference from the data; (2) on this basis On the Internet, some researchers provide an instrument that can be tested according to the skein method, winch method or a combination of the two (such as Chinese Patent Publication No. CN201548481U), but this method emphasizes the friction between the test yarn and the textile machine Performance, which focuses on workshop production, has a certain gap with the actual use of medical sutures penetrating human tissue and knotting, and is not suitable for medical sutures; (3) Some researchers also start from the perspective of friction resistance , evaluate its friction performance by testing the friction resistance times of the yarn (such as Chinese Patent Publication No. CN102435521U, Publication No. CN203117064U), that is, the yarn rubs repeatedly with the abrasive piece, and calculates the friction times until the yarn breaks or becomes white. This method is suitable for evaluating the friction properties of materials such as ropes and cables, but it is far from the actual use of medical sutures, and the test results cannot provide effective reference for medical sutures.
[0004] At present, the characterization of the friction performance of medical suture thread when it penetrates into the tissue mainly comes from the postoperative feedback of the surgeon, and the scoring evaluation method is mostly used for subjective evaluation of the project, lacking more accurate objective data to support this, and this method involves the human body Or animal models, the experiment is complicated and the cost is high; for the test of the friction performance between medical sutures, although there are reports in the literature at present, its test method is to test the medical sutures of the same specification that the medical sutures are bent from two opposite sides. The frictional performance between medical sutures can be evaluated by the force value required to pull them out between the threads, but there are no norms and standards for the specific operating parameters of the test, and this threading method is different from surgical knotting, so it is different from surgical knotting. The actual clinical use is not well connected

Method used

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  • Medical suture friction performance testing apparatus and testing method thereof
  • Medical suture friction performance testing apparatus and testing method thereof
  • Medical suture friction performance testing apparatus and testing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] This example uses as figure 1 The shown friction performance test assembly when the medical suture thread penetrates the tissue includes a part fixing seat 101 and a tissue clamping part. combine Figure 3A-1 , Figure 3A-2 , Figure 3B-1 and Figure 3B-2 , the tissue clamping parts include a cloth clamping round cover 102a and a base 102b for placing a simulated tissue for simulating human epidermis, the cloth clamping round cover 102a has a presser foot, and the diameter of the presser foot is the same as the inner wall diameter of the base 102b, and There are circular holes with a diameter of 2mm at the center of the circle respectively. The cloth-clad round cover 102a and the base 102b can be nested with each other, and the positions of the circular holes coincide after nesting, and the two holes can be connected. The nested tissue clamping parts can be assembled in the slot of the fixing base 101 through the nut 103 and the nut 104, wherein the nuts 103 and 10...

Embodiment 2

[0055] The testing device of this embodiment is the same as that of Embodiment 1.

[0056] In the tissue clamping part, the diameter of the presser foot of the cloth clamping round cover 102a is the same as that of the inner wall of the base 102b, and there are round holes with a diameter of 15mm at the center of the circle respectively. The two can be nested with each other, and the positions of the round holes coincide after nesting , two holes can pass through. The nested tissue clamping parts can be assembled in the slot of the fixing base 101 through the nut 103 and the nut 104 , wherein the nut 103 and the nut 104 cooperate with the screw 101a and the screw 101b respectively. There is a slit with a diameter of 15 mm on the central axis of the base part of the fixing seat 101, and the slit is connected with the round hole of the cloth-clamping round cover 102a and the base 102b of the tissue clamping part assembled in the slot.

[0057] In this embodiment, a skin-like no...

Embodiment 3

[0060] The specifications of the test device and clamping parts of this embodiment are the same as those of Embodiment 1.

[0061] In this embodiment, a commercially available artificial skin dermis is used to simulate tissue, which is cut into a circle with the same diameter as the inner wall of the base 102b, and placed in the base 102b. nesting. The nested tissue clamping part 102 is placed in the slot of the fixing seat 101, the screw 101a and the screw 101b respectively pass through the U-shaped groove of the cloth clamping round cover 102a, and the nut 103 and the nut 104 respectively connect with the screw 101a and the screw 101a. 101b is tightened. 2-0 # Specification Silk medical suture length is 10cm, one end is connected with 40cN load, and the other end is connected with suture needle. The suture needle vertically passes through the round hole of the cloth clamping round cover 102a of the tissue clamping part, the simulated tissue, and the round hole of the base...

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Abstract

The invention relates to a medical suture friction testing apparatus. The apparatus comprises an assembly for testing the friction performance of a medical suture when the medical suture penetrates tissues, and an assembly for testing the friction performance between medical sutures. The assembly for testing the friction performance of a medical suture penetrating tissues stimulates the friction performance between the medical suture and all tissues when the medical suture penetrates human tissues, and the assembly for testing the friction performance between medical sutures stimulates the friction assembly between the medical sutures in the knotting process of the medical suture. The two assemblies can be arranged in a multifunctional fiber strength and elongation tester to replace a lower clamping head of the tester in order to carry out relevant friction performance test. The invention also discloses a corresponding medical suture friction testing method. The friction testing apparatus has the advantages of simple structure, convenient operation, and objective and real result. The apparatus and the method fill up a blank in the quantitative characterization of present in-vitro stimulation of the friction performance of the medical suture, and provide scientific bases for the improvement of the structure of the medical suture.

Description

technical field [0001] The invention relates to a device and method for testing the friction performance of medical sutures when they penetrate into tissues and the friction performance between medical sutures. Background technique [0002] The friction performance of medical suture is one of the important performances of its surgical operation, mainly including the friction performance between the thread and the tissue when the medical suture penetrates into human tissue and the mutual friction between the thread and the thread when the medical suture is knotted. performance. The former can be expressed by the force required when the medical suture passes through the tissue, that is, the tissue drag force. In clinical suture, when the medical suture passes through the human tissue, if the surface is relatively rough, the tissue drag force will be large, which will affect the suture quality. . The latter refers to the force required for medical sutures to slide against eac...

Claims

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Application Information

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IPC IPC(8): G01N19/02
Inventor 陈晓洁王璐侯丹丹黄新林李汝勤
Owner DONGHUA UNIV
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