Novel arterial blood gas needle for examination in respiration and critical medicine department

Abstract

The novel arterial blood gas needle comprises a sleeve, an inner cylinder, a needle cylinder piston, a piston push rod, a needle head, a sealing device and a needle sleeve, the needle head comprises a first tip end and a second tip end, and a needle head protruding part is arranged on the peripheral face of the side wall of the needle head; a first spring is arranged between the end face of the inner cylinder and the second fixing support. A second spring is arranged between the needle sleeve and the second fixing bracket; the needle cylinder piston is arranged in the inner cylinder; the inner cylinder is arranged in the sleeve; an anticoagulant ball is arranged in the sealing cavity, the density of the anticoagulant ball is greater than 1g/cm < 3 >, and the surface area of the anticoagulant ball is greater than 1cm < 2 >; a plurality of groove parts and a plurality of convex parts are arranged on the surface of the anticoagulation ball; and anticoagulants are arranged on the surfaces of the groove parts and the convex parts.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a novel arterial blood gas needle for use in respiratory and critical care medical examinations. Background technique [0002] Blood gas analysis is mainly used to judge the oxygen supply and acid-base balance of the body. It has very important clinical significance for respiratory diseases, especially critically ill patients. , Reliable means, can directly reflect the pulmonary ventilation function and its acid-base balance. The concentrations of dissolved oxygen and carbon dioxide in arterial blood are the closest to those in alveoli, and the distribution of components in the body is consistent, which is necessary for the correct assessment of blood oxygen content. Normal blood gas and acid-base balance is an important aspect of the stable internal environment of body fluids, which the body depends on for healthy survival. Arterial blood gas analysis can monitor the p...

AI Technical Summary

Problems solved by technology

[0003] The existing arterial blood gas collector still has many defects in the collection process: if the needle is pulled out after collecting the patient's arterial blood, it is difficult to avoid the possibility that the needle belonging to the sharp instrument will be exposed to the outside world and stab the operator; Returning the needle cover cannot guarantee absolute safety, and there is also the possibility of being stabbed by a contaminated needle during this operation

Traditional collectors have limited effect on heparinization of blood in hypercoagulable patients with erythrocytosis, and such patients are very common in plateau areas, often causing the instrument to be unable to analyze coagulated blood when it is sent for testing.

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