Composite reinforced segmental epidural catheter and preparation method thereof

Abstract

The invention provides a composite reinforced segmental epidural catheter and a preparation method thereof. The composite reinforced segmental epidural catheter comprises a catheter head and a catheter body; a plurality of drug outlet holes are formed in an end of the catheter head in the peripheral direction of the tube head at intervals; the catheter body consists of an outer sleeve and an innersleeve inserted in the outer sleeve; the outer sleeve and the inner sleeve are made of high polymer materials; scale marks are arranged between the outer sleeve and the inner sleeve; and a spiral flat steel wire is inserted in the inner sleeve. On the basis of ensuring axial rigidity and high breaking power for facilitating intervention of the catheter, the spiral flat steel wire supports the body of the catheter, and thus, a anesthetist can accurately control an implanted position; and printing ink is stopped from being in contact with a human body by a composite technology, namely, after scales are printed, a biocompatible thermoplastic elastomer layer is added on the outer layer, by the high biocompatible segmental epidural catheter, the problems that the hardness of the catheter cannot be adjusted, harmful substances remain due to printing ink, and surfaces are not smooth after printing are solved, operation is facilitated, the adverse effects of the product to patients are reduced, and the comfort level of the patients is improved.

Description

Technical field: [0001] The invention relates to a composite reinforced epidural anesthesia catheter and a preparation method thereof. Background technique: [0002] The anesthesia catheter is an essential product for epidural anesthesia in the operating room of the hospital. The advantages of this anesthesia method are that the anesthesia effect is fast and the side effects are small; once the doctor makes a wrong operation, the anesthesia catheter is easy to break in the patient's body, and the blood vessels and nerves are easily damaged during the intervention. And dura mater, resulting in complications that increase patient suffering. At present, more than 95% of domestic hospitals use this method to anesthetize patients in operations below the abdomen. [0003] In recent years, domestic and foreign anesthesia catheter research and development experts have made many attempts and efforts to prevent interventional injuries, such as using chemical methods to soften the cat...

AI Technical Summary

Problems solved by technology

Although the above work has achieved fruitful results in reducing anesthesia catheter intervention injuries, factors such as catheter fracture force are still small, production efficiency is low, and product quality is unstable have brought many unknown hazards to the human body.

[0004] In addition, the composite reinforced anesthesia catheters currently on the market all adopt the heat-shrinking principle of the polymer sleeve to wrap the circular spiral flat steel wire. Large, not only hinders the flow rate of the liquid medicine but also easily seeps into the gap of the spiral flat steel wire to form a liquid residue and cannot control the residual amount; moreover, the biocompatibility of medical device products depends mostly on the raw materials used, stainless steel It has high biocompatibility with polymer materials, and the key materials that affect the biocompatibility of anesthesia catheters are the inks and solvents used for printing scales. Due to the requirements of ink characteristics, raw material formulations with poor biocompatibility must be used to increase the attachment of the scale marks. Emphasis is that even though the biocompatibility of medical-grade inks barely meets the minimum requirements for medical use, medical inks still generally have the defect that the scale lines are easy to fall off after printing

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