Special hand guard closing and clamping mechanism for arterial blood gas needle

Abstract

The invention relates to the technical field of medical instruments, in particular to a special hand guard closing and clamping mechanism for an arterial blood gas needle. The mechanism consists of main clamping cylinders, fixed grooves, connecting wires, fastening cylinders, inserting strips, non-return rings, a needle tip groove, needle tip clamps, a protective plate, a needle stem groove, transition grooves, a pintle groove, a buckle and a connecting sheet. Each main clamping cylinder is of a columnar structure with a semicircular cross section, the needle tip clamps are of a semi-circular-truncated-cone-shaped structure, the vertical flat wall of the needle tip clamp is provided with the vertical needle tip groove, and the middles of the two main clamping cylinders are located in semi-cylindrical spaces of the two fastening cylinders which are connected with each other respectively at the same time. When each fastening cylinder sleeves the needle tip clamps, the needle tips are sealed by the needle tip clamps under the extrusion of the inner walls of the fastening cylinders.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a hand guard closing and clamping mechanism for arterial blood gas needles. Background technique [0002] Arterial blood gas analysis is of great significance in clinically guiding oxygen therapy to adjust various parameters of mechanical ventilation and correcting acid-base and electrolyte imbalances. The method of arterial blood sampling has a significant impact on the results of blood gas analysis. When sending for inspection, whether the sampled specimen is completely isolated from the air will directly affect the test results of blood gas pH, PaCO2, and PaO2. Therefore, the needle tip of the blood gas needle needs to be blocked with a rubber stopper immediately after blood collection. The needle of the blood gas needle consists of a pintle, a needle stem and a needle point. The blood gas needle on the existing market is equipped with a rubber block for blocking th...

AI Technical Summary

Problems solved by technology

Since the finger holding the rubber block is in the forward direction of the needle tip, and due to the limited size of the rubber block, the distance between the finger and the planned needle entry point of the rubber block is extremely small. Puncture, because the needle tip has just been pulled out from the patient's blood vessel at this time, so this kind of accident will bring a great risk of virus transmission, and even endanger the life safety of medical staff

[0005] 2. Low operating efficiency

[0006] Since the operator wants to avoid the above-mentioned dangers, he can only carefully and slowly insert the needle tip into the rubber block, which prolongs the operation time; Strength, it is not a quick and easy process to insert the needle tip into the rubber block to a certain depth, which requires the operator to carry out continuously and with greater force, and always keep the direction of the needle tip in line with the direction of its axis. The operation is time-consuming and labor-intensive, which further reduces work efficiency

[0007] 3. The sealing state of the needle tip is unstable

Therefore, in the process of sending the sampling results for inspection, once the rubber block comes into contact with other objects, or there is friction between the rubber blocks of multiple blood gas sampling needles, it is easy to cause the rubber block to fall off, resulting in the failure of the air barrier, thereby reducing the Accuracy of test results

Images