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Central vein trocar convenient for knowing puncture state of needle head

A trocar and puncture needle technology, which is applied in the field of medical devices, can solve the problems of affecting the infusion speed, reducing efficiency, and not dismantling, etc., and achieve the effects of improving the puncture success rate, smooth withdrawal, and improving efficiency

Inactive Publication Date: 2021-07-27
祝恒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this solution still has the following disadvantages: due to the use of two suction channels: the first blood pumping channel and the second blood pumping channel, this will cause too much space in the needle cavity of the puncture needle, which will affect blood drawing and subsequent infusion The speed will reduce the efficiency; two suction channels need to switch different channels according to the connection of the syringe, the operation is cumbersome, and it is not disassembled after use, which will affect the infusion speed

Method used

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  • Central vein trocar convenient for knowing puncture state of needle head
  • Central vein trocar convenient for knowing puncture state of needle head
  • Central vein trocar convenient for knowing puncture state of needle head

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Experimental program
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Effect test

Embodiment 1

[0028] see Figure 1 to Figure 4 , the present invention provides a technical solution:

[0029] A central venous trocar that is convenient for knowing the puncture state of the needle, including a puncture needle 1 and a blood drawing channel 5, the head end of the puncture needle 1 is a puncture needle 2, and the tail end of the puncture needle 1 is equipped with a connection variable diameter Tube 10, the puncture needle 2 is provided with double needle holes with spacing, the connecting variable diameter tube 10 is equipped with a syringe fixing tube 11 sleeved with a syringe positioning ring 14, the syringe fixing tube 11 and the syringe positioning ring 14 are both set There is a fixed cavity 12, the blood drawing channel 5 is located in the puncture needle 1, and the head end can move in the puncture needle 1 to change the communication state with each hole of the double needle hole, and the tail end is located in the fixed cavity 12. In the present invention, the head...

Embodiment 2

[0039] see Figure 5 to Figure 8 , the present invention provides a kind of technical scheme, is basically the same as embodiment 1, difference is:

[0040] The first needle hole 3 and the second needle hole 4 are on different sides, and there is an angle between them, the sliding part 9 is one, the groove body 8 is two, and each groove body 8 is respectively Correspondingly, the first needle hole 3 and the second needle hole 4 are on the same side and on the same straight line. In this embodiment, there is only one sliding part 9, and the first needle hole 3 and the second needle hole 4 are also on different sides, that is, one of the two holes of the double needle hole is at the needle point of the puncture needle 2, and the other is at the needle point of the puncture needle 2. It can be on the inner wall on both sides of the tail end of the puncture needle 2. The groove body 8 is a T-shaped groove, and the sliding part 9 is adapted to insert and slide therewith. In this...

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Abstract

The invention relates to a central vein trocar convenient for knowing puncture state of a needle head, which comprises a puncture needle and a blood drawing channel, the puncture needle head is arranged at the head end of the puncture needle, a connecting reducer pipe is installed at the tail end of the puncture needle, double needle head holes having a space are formed in the puncture needle head, the connecting reducer pipe is provided with an injector fixing pipe sleeved with an injector positioning ring, fixing cavities are formed in the injector fixing pipe and the injector positioning ring, the blood drawing channel is located in the puncture needle, the head end of the blood drawing channel can move in the puncture needle to change the communicating state of the blood drawing channel and each hole of the double-needle-head holes, and the tail end of the blood drawing channel is located in the fixing cavities. According to the invention, the relation between the puncture needle and the blood vessel position can be correctly judged according to the double needle head holes, so that the puncture success rate is effectively improved; only one blood drawing channel is arranged, large space of the puncture needle is not occupied on the basis that the puncture needle of the same specification is adopted, and when the puncture needle is used for blood drawing or follow-up infusion, the blood drawing or infusion efficiency of the puncture needle can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a central venous trocar for knowing the puncture state of a needle. Background technique [0002] In the prior art, when a puncture needle is used for blood vessel puncture, the positional relationship between the puncture needle and the blood vessel is as follows: the first one is that the slope of the puncture needle all enters the blood vessel cavity, the blood is withdrawn smoothly, and the trocar can be inserted smoothly; The situation is that when the puncture is too shallow, the front end of the bevel of the puncture needle penetrates into the blood vessel, but the end is still outside the blood vessel. At this time, blood can be drawn back, but the trocar cannot be inserted smoothly; the third situation is that the puncture is too deep At this time, the front end of the beveled surface of the puncture needle pierces the vascular cavity, while the end of the be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/158
CPCA61M5/158A61M2005/1587A61M2005/1588
Inventor 祝恒
Owner 祝恒
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