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A central venous trocar with holes

A trocar and vein technology, applied in trocars, puncture needles, etc., can solve the problems of not being able to judge the depth of the puncture needle and not being able to place the cannula, and achieve the effects of improving the success rate of puncture, avoiding injuries, and reducing waste

Active Publication Date: 2020-09-25
BEIJING YOUAN HOSPITAL CAPITAL MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a central venous cannula with holes to solve the clinical problem that the blood can be drawn back, but the cannula cannot be inserted, and the depth of the puncture needle cannot be judged. The problem

Method used

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  • A central venous trocar with holes
  • A central venous trocar with holes
  • A central venous trocar with holes

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0024] see Figure 1-5 , an embodiment provided by the present invention: a central venous trocar with holes, comprising a puncture needle 1, the puncture needle 1 includes a puncture needle body 2, a puncture needle head 3 is arranged on one side of the puncture needle body 2, and the puncture needle The other side of the needle body 2 is provided with a puncture needle tail 13, and the puncture needle 3 is provided with a first needle hole 4 and a second needle hole 5, and the first needle hole 4 is arranged on one side of the second needle hole 5, and the puncture When it is too shallow, only the first needle hole 4 penetrates into the blood vessel, while the seco...

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Abstract

The invention discloses a central venous cannula with multiple holes, and relates to the related fields of venous cannulas. The frequently occurred problem that in the prior art, blood can be drawn, but the cannula cannot be inserted, and then the depth of a puncture needle cannot be judged is solved. The puncture needle comprises a puncture needle main body, a puncture needle head is arranged onone side of the puncture needle main body, a puncture needle tail is arranged on the other side of the puncture needle main body, the puncture needle head is provided with a first needle head hole anda second needle head hole, the first needle head hole is formed in one side of the second needle head hole, a fixed tube is arranged outside one side of the puncture needle main body, and a connecting variable diameter tube is arranged on one side of the fixed tube, and a syringe fixing tube is arranged on the one side of the connecting variable diameter tube, and the syringe fixing tube and a syringe locating ring are internally provided with fixed cavities respectively; a first blood drawing channel and a second blood drawing channel are arranged in the puncture needle main body.

Description

technical field [0001] The invention relates to the related field of venous trocars, in particular to a central venous trocar with holes. Background technique [0002] There are three situations in the relationship between the puncture needle and the blood vessel when the puncture needle is used for blood vessel puncture. The first one is that the bevel of the puncture needle all enters the blood vessel cavity, the blood is withdrawn smoothly, and the trocar can be inserted smoothly. The second situation is that when the puncture is too shallow, the front end of the inclined surface of the puncture needle penetrates into the blood vessel, while 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 when the puncture is too deep, the front end of the beveled surface of the puncture needle pierces the blood vessel cavity, while the end of the beveled surface of the puncture need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/34
Inventor 权哲峰
Owner BEIJING YOUAN HOSPITAL CAPITAL MEDICAL UNIV
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