b ultrasound-guided arteriovenous puncture fixator

Abstract

The invention relates to a B-ultrasonic-guided artery and vein puncture fixator which comprises a fan-shaped support. A fan-shaped puncture plate is installed on the fan-shaped support through a hinge shaft, a resetting spring used for installing the fan-shaped puncture plate is installed on the hinge shaft, a friction piece matched with the fan-shaped support is arranged on a lateral lug of the fan-shaped puncture plate, a guide groove is arranged in the middle of the fan-shaped puncture plate, a guide column is fixedly installed on the fan-shaped support corresponding to the guide groove, a spring is installed on the guide column arranged between the inside of the fan-shaped puncture plate and the fan-shaped support, a controller is installed at the outer end of the guide column, and a puncture needle clamping slot is arranged on the fan-shaped puncture plate. The fixator is accurate in location and puncture and simple and convenient to operate.

Description

technical field [0001] The invention belongs to a medical device for fixing an arteriovenous puncture needle. Background technique [0002] At present, clinical arteriovenous puncture is basically "blind puncture", that is, seeing the color of the vein or touching the direction of the vein or the pulsation of the artery, and seeing blood return after inserting the needle, and then placing all the needles into the blood vessel for fixation or under the guidance of an iron needle core A soft trocar is placed into the blood vessel. Its disadvantages are: 1. The so-called seeing or touching is only a sensory effect from the outside: when the needle tip touches a blood vessel, the vein may be flattened or deformed; The position where the skin touches the skin may not be its exact center or the so-called "eccentricity"; 2. The needle tip punctures the skin and subcutaneous tissue but before reaching the blood vessel, it will interfere with the puncturer's previous sensory effect ...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The so-called seeing or touching is only a sensory effect from the outside: when the needle tip touches a blood vessel, the vein may be flattened or deformed; The position where the skin touches the skin may not be its exact center or the so-called "eccentricity"; 2. The needle tip punctures the skin and subcutaneous tissue but before reaching the blood vessel, it will interfere with the puncturer's previous sensory effect judgment: the venous circuit is no longer the same as before. So clear or its direction or arterial pulse is no longer the previously determined position or direction; and which layer the puncture needle reaches between the skin and blood vessels is unknown to the puncturer; Puncture failure due to puncture of the blood vessel again; the needle core is in the blood vessel, but the outer soft cannula is still outside the blood vessel wall. At this time, blind or forced catheterization may place it into the soft tissue outside the blood vessel; 4. Infants and young children , patients with obesity or edema, and patients with advanced tumors cannot touch or see the direction of blood vessels, or the blood vessels are too deep or hardened, resulting in a greatly reduced success rate

However, they can only provide patients with a non-invasive imaging data; and a simple puncture requires their cooperation with professional puncture personnel to complete

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