subject: Russia issued a new medical surgical suture LUO - 4D Theater System - 3D/4D Driving Flight Simulator [print this page] Russia issued a new medical surgical suture LUO - 4D Theater System - 3D/4D Driving Flight Simulator
At present, Russia is still the majority of medical surgical suture line by twisting and weaving, and their surface is not smooth enough, easy to sew the wound and trauma friction. The international community has already conducted research on polymer impregnated surgical suture or polymer coating, that is suture surface with polymer solution or polymer dispersion by treatment, the treated sutures not only smooth application, but also a certain biological activity, play a pain, bleeding, antibacterial and other effects.
The All-Russian Research Institute of synthetic fiber and other units of experts, drawing on patent documents, based on surgical suture for the modification of Russian research and put forward their views and make a series of technology experiments, are introduced to our country peers:
Modification of surgical suture, using polymer impregnation better grasp of this law to facilitate impregnation layer thickness, to preserve the original Core line of physical and mechanical nature, but also given to biological activity of the outer cores. Modification of surgical sutures to meet the following requirements: the use of the polymer should be non-toxic, its out in the living organism is also non-toxic; polymer solution, non-toxic, volatile; polymer molecular weight and chemical structure must be formed impregnated layer of strength and flexibility, and to adhere to the surgical suture, the suture but will not affect the necessary sterilization.
The polymer impregnated surgical suture layer, if you want to have biological activity, a pharmaceutical carrier, to have the following properties: polymer impregnation to the impregnating layer formed after the pharmacy has to be with good compatibility; impregnated layer itself to have a certain moisture absorption, in order to facilitate transmission of pharmaceutical to the wound; impregnated layer to be able to maintain the pharmacy in which some of the content and validity.
To achieve these multiple requirements, the research on the dipping solution is very important. Russia is using the information recorded in ethanol with copolyamide solution.
Monomer is -caprolactam homopolymer and hexamethylene diamine condensation product of adipic acid in the copolymer ratio of 60:40 between the two. Fat - aromatic copolyamide to -caprolactam and the basis of aromatic dicarboxylic acid containing cationic gene-SO3H, presented with aromatic and difficult to free rotation of the carbonyl gene distribution, full hamper the formation of hydrogen links, which made the melting point down lower crystallinity. The role of the lipid chain copolymer aromatic ring, which will give aromatic chain disorder in lipid distribution, destroy its integrity, and hinder the crystallization of polymers. Amorphous phase increases, so that the speed, such as water vapor permeability, elongation, resistance to rupture and other performance increases, then the elastic properties of amorphous polymer crystallization and the crystallization half time than higher. Increase the molecular structure of the disorder, will be able to reduce the melting point to reduce the intermolecular interaction. Polymer chain segments to increase exercise to make them close to the solvent of the disorder, close to the ion activity linked to increase the solubility of polyamide and reactivity. Ethanol with copolyamide impregnated surgical suture, can be with adhesive, moisture absorption, ion activity of the impregnated layer. If the impregnating solution preservatives, antibiotics or other effective material, can make use of ionic exchange process to pharmaceutical fixation in surgical suture impregnated layer, play a role in biological activity. Because most of the major types of medical pharmaceutical organic cation salt and inorganic acid, so use with ion activity, carboxyl and sulfonic acid containing polymer, can achieve the best results.
