Vein remaining needle

Abstract

The invention relates to a vein remaining needle which mainly comprises a remaining rubber tube, a puncture needle guide disc, a sealing tube plug and a puncture needle, wherein the vein remaining needle is provided with at least one hirudin injection device capable of preventing blood from forming thrombi in the vein remaining needle; the liquid injection outlet at the bottom of the hirudin injection device can be selectively communicated with the inner cavity of the vein remaining needle; and the inner cavity of the hirudin injection device is filled with a hirudin biological anticoagulant, and the top is provided with a driving device capable of driving the hirudin biological anticoagulant in the inner cavity to be injected into the inner cavity of the vein remaining needle. Because the vein remaining needle adopts the hirudin as an anticoagulant and fully utilizes the super strong and super long anticoagulation properties of the hirudin biological anticoagulant, the vein remaining needle fully guarantees that the blood flowing back into the vein remaining needle because of a negative pressure can not generate thrombi, thereby ensuring the smoothness of each channel of the vein remaining needle, avoiding the adverse impact resulted from puncturing again and utilizing heparin sodium which should be used immediately after being prepared, and effectively reducing the pain of patients and the labor strength of medical personnel. Besides, the invention has the advantages of easy manufacturing process and simple implementation, and is beneficial to popularization.

Description

technical field [0001] The invention relates to a medical instrument for infusion of liquid, in particular to an indwelling needle used for infusion of liquid into the blood vessel during the indwelling period of the blood vessel after arteriovenous puncture. Background technique [0002] Infusion can transfer almost all medicinal liquids into the human body through blood vessels to achieve the purpose of treating and preventing diseases. In clinical practice, blood vessels are often punctured multiple times for infusion therapy due to periodic treatment plans. In the process of chemotherapy for tumors, treatment of cardiovascular and cerebrovascular diseases, and poor vascular conditions (hardening and increased fragility) in children and the elderly, the patient's blood vessels are damaged due to multiple punctures, or the patient does not cooperate, which will increase the patient's pain and anxiety. The puncture operation is difficult, and even superficial blood vessels...

AI Technical Summary

Problems solved by technology

They can basically complete the vascular puncture process and the indwelling (embedding) of the indwelling soft trocar needle in the arteriovenous vessel; but the arteriovenous indwelling needles currently used have the following defects and deficiencies: Risk: Since the indwelling needle base has the same structure as the ordinary puncture needle guide plate, there is no measure or device to prevent blood (reflux), so that after the puncture needle is pulled out, the blood will flow back, polluting the environment and (medical staff and surrounding people) human body, Form a safety risk; moreover, in the process of using the indwelling needle for repeated infusion, the action of pulling out the infusion connector after one infusion will ine

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