Deep vein puncture device

Abstract

The invention relates to a deep vein puncture device, comprising internal needle and sheath. It is characterized in that: the tip end of internal needle is nib, there is side pore and inactive separated vessel wall, the external diameter of internal needle is small, about 0. 1-0. 5 mm (when the external diameter is 0. 5mm, the cross-sectional area is 14. 8% of that of normal 18 G deep vein puncture needle, and the blood amount is 2. 19% of that of normal 18 G puncture needle at the same time), so the injury is greatly reduced; the sheath is shorter than internal needle, and is equipped with conical tip and side pore. When the tip end of internal needle punctures into deep vein, the sheath can be conveyed to vein along internal needle, the steel silk is conveyed to deep vein through sheath cavity and side pore. the invention is characterized by simple, accurate and safe operation. The outer wall of internal needle and sheath are equipped with scale, which is helpful to determine the needle depth, and are also equipped with end that connects injector.

Description

technical field [0001] The invention relates to a medical instrument, in particular to a deep vein puncture device. Background technique [0002] Deep venous puncture to place a deep venous catheter is an important way for rapid blood transfusion, infusion, intravenous nutritional support, and monitoring of central venous pressure. Commonly used deep vein puncture methods include subclavian vein puncture and internal jugular vein puncture. Among these puncture methods, an 18G deep vein puncture needle is usually used, the tip of this type of deep vein puncture needle is hollow and bevel-shaped, and the outer diameter is about 1.3 mm. When puncturing, the bevel-shaped hollow tip cuts the skin and the blood vessel wall, so there is a large trauma to the human body. Moreover, in clinical application, the probability of accidentally injuring an artery during puncture is as high as 5% to 20%. If an artery is accidentally injured during puncture, it can cause local severe hemato...

AI Technical Summary

Problems solved by technology

Moreover, in clinical application, the probability of accidentally injuring an artery during puncture is as high as 5% to 20%. If an artery is accidentally injured during puncture, it can cause local severe hematoma, and even lead to hemorrhagic shock or compression of lung tissue, causing dyspnea and life-threatening

As an improvement, first use a syringe needle with a small outer diameter for trial puncture, and then puncture with a commonly used 18G deep vein puncture needle near the syringe needle after successful puncture. Accurate access to deep veins without even damaging arteries

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