Remaining needle catheter structure

Abstract

The invention discloses a remaining needle catheter structure. The remaining needle catheter structure comprises a steel needle, a first catheter is arranged on the outer surface of the rear end of the steel needle, a catheter seat is arranged on the outer surface of the rear end of the first catheter, and a clamping flexible pipe is arranged on the outer surface of the rear end of the catheter seat. The remaining needle catheter structure is provided with an open pore and a buffer mechanism, when the catheter is subjected to a negative pressure condition, the negative pressure subjected by the catheter is transferred to various directions from one direction and the negative pressure subjected by the various directions is weakened due to the fact that a hole is formed in the circumference;meanwhile, the catheter cannot greatly offset due to the symmetric distribution on the circumference and balanced force in the same direction, the damage to blood vessel walls is avoided, blood vessel congestion and liquid leakage are avoided, connective tissue hyperplasia and phlebophlogosis caused by leaked liquid are avoided, shaking subjected by the steel needle can be reduced and pains of patients are reduced when the steel needle is disassembled, and a better use prospect is brought.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an indwelling needle catheter structure. Background technique [0002] The core components of the indwelling needle include a soft catheter that can be indwelled in the blood vessel, and a stainless steel puncture guiding steel needle. When in use, the catheter and the steel needle are punctured into the blood vessel together. Indwelling needles only place soft catheters in blood vessels for infusion or hemodialysis treatment, which is convenient for clinical medication, rescue medication for acute and critical patients, reduces the workload of nurses, and reduces pain in children. Therefore, indwelling needles are widely used in clinical practice. . [0003] There are certain disadvantages in the use of the existing indwelling needle catheters. First, due to the large negative pressure on the end of the catheter, it may cause the end of the catheter to deflect in the blood vessel...

AI Technical Summary

Problems solved by technology

[0003] There are certain disadvantages in the use of the existing indwelling needle catheters. First, due to the large negative pressure on the end of the catheter, it may cause the end of the catheter to deflect in the blood vessel and approach the blood vessel, resulting in damage to the blood vessel wall, which is prone to Vascular congestion and fluid leakage, seeping fluid leads to connective tissue hyperplasia and phlebitis, which has certain adverse effects. Secondly, when the steel needle is withdrawn, it is easy to cause the steel needle to shake, causing the patient's blood vessels to be injured, which has certain adverse effects. Influence, brought certain influence to people's use process, for this reason, we propose a kind of indwelling needle catheter structure

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