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Epidural anesthesia catheter

An anesthesia catheter and epidural technology, applied in the field of medical devices, can solve the problems of easy complications, patient discomfort, nerve compression by the anesthesia catheter, etc.

Pending Publication Date: 2021-06-08
LINYI XINGHUA MEDICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional anesthesia catheters consider the implantability, the convenience of connecting with connectors, and the appropriate reduction of damage, and most of them use straight catheters. Can compress nerves, making patients uncomfortable and prone to complications

Method used

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  • Epidural anesthesia catheter
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  • Epidural anesthesia catheter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides an epidural anesthesia catheter, which can effectively reduce damage to nerves and blood vessels during use. Such as Figure 1-3 As shown, the epidural anesthesia catheter includes:

[0047] The tube body 1 is hollow and through, wherein the tube body 1 is selected from soft and transparent materials, which are soft enough to allow it to enter the epidural space and can be bent, and transparent to observe whether the liquid medicine flows in. For example, the material of the pipe body 1 can be thermoplastic polyurethane elastomer, and the material is uniform.

[0048] Such asfigure 1 As shown, the pipe body 1 includes an integrally formed head section 101 and a tail section 102, wherein the inner diameter of the pipe of the tail section 102 is uniform, and the inner diameter of the pipe body of the head section 101 extends from an end close to the tail section 102 to a side far away from the tail section 102. One end tapers and becomes thinner...

Embodiment 2

[0059] This embodiment provides the preparation method of the epidural anesthesia catheter provided in embodiment 1, and the specific steps are as follows:

[0060] Step 1. Use a spring winding machine to wind 304 medical stainless steel wire into the spiral steel wire provided in Example 1, wherein the diameter of the spiral steel wire is 0.1mm, and the length of the head section of the anesthesia catheter body is designed to be 5cm, and the tail section is 20cm , the helical pitch of the helical steel wire at the tail section is 0.1 mm, and the helical steel wire at the head section begins to increase the helical pitch at a distance of 4 cm from the drug outlet until the helical pitch at the drug outlet reaches 2.5 mm;

[0061] Step 2, adding the thermoplastic polyurethane elastomer raw material into the extruder to melt, adjusting the extrusion speed of the extruder and the temperature of the plasticizing section to make it stably extrude the straight tube, and feeding it in...

Embodiment 3

[0065] The preparation method of Example 3 is roughly the same as that of Example 2, the only difference being that in Step 3, the step 3 is directly immersed in a cooling water tank for cooling and setting without step vacuum negative pressure and temperature reduction treatment.

[0066] For the epidural anesthesia catheter prepared in Example 2, the anesthesia catheter obtained in Example 3, and the anesthesia catheter previously developed by the applicant, the breaking force of the head section and the tail section were tested respectively, and the same amount of medicinal solution was passed through Finally, the liquid medicine was flowed out to observe whether there was any liquid medicine residue. The results are shown in Table 1.

[0067] Table 1

[0068]

[0069]

[0070] As can be seen from the data in Table 1, the breaking force of the epidural anesthesia catheter provided by the present application has been significantly improved compared with the traditional...

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Abstract

The invention discloses an epidural anesthesia catheter which comprises a hollow through catheter body, the catheter body comprises a head section and a tail section, the inner diameter of the catheter body of the tail section is uniform, the inner diameter of the catheter body of the head section is gradually reduced and thinned from the end close to the tail section to the end away from the tail section, a spiral steel wire is wrapped in the catheter wall of the catheter body, the spiral pitches of the spiral steel wire in the tail section are equal, and the spiral pitches of the spiral steel wire in the head section are gradually increased from the end close to the tail section to the end away from the tail section. According to the epidural anesthesia catheter provided by the invention, the head end of the anesthesia catheter is further gradually softened due to the gradually-thinned head section and the gradually-increased spiral pitches of the spiral steel wire in the head section, the direction of the anesthesia catheter is automatically changed if the anesthesia catheter encounters resistance when the anesthesia catheter is placed into an epidural space, and the catheter is bent to cause small stress on the epidural during indwelling after the catheter is placed, so that nerves and blood vessels are prevented from being damaged.

Description

technical field [0001] The application belongs to the technical field of medical devices, and in particular relates to an epidural anesthesia catheter. Background technique [0002] Epidural nerve block is an anesthesia method widely used in clinical practice. It has the advantages of simple operation, low cost, easy management during operation, and convenient epidural analgesia after operation. The main component used in this anesthesia method is anesthesia catheter. [0003] The anesthesia catheter needs axial rigidity to enter the epidural space smoothly when in use. Since the epidural space is rich in nerves and blood vessels, the softer the wall of the anesthesia catheter placed in the epidural space, the more damage to the nerves and blood vessels. The smaller the size, the easier it is to change the direction to reach the designated position, and because the small outer diameter of the anesthesia catheter needs to be connected to the syringe through the connector, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00B29D23/00
CPCA61M25/0009A61M25/0021A61M25/005A61M25/0053A61M25/008B29D23/001A61M2205/32A61M2025/0063
Inventor 兰天星李朝东卢言京
Owner LINYI XINGHUA MEDICAL EQUIP
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