Slotting needle tube and venous transfusion indwelling needle

Abstract

The invention discloses a slotting needle tube and a venous transfusion indwelling needle. The venous transfusion indwelling needle comprises a catheter assembly and a needle tube assembly which are mutually connected, wherein the catheter assembly comprises a catheter seat and a catheter fixed at the far end of the catheter seat and used for transfusion; the needle tube assembly at least comprises a needle tube seat and a needle tube; the proximal end of the needle tube is inserted into the needle tube seat, the distal end of the needle tube penetrates through the hollow interior of the catheter and extends out, the needle tube is provided with an opening, the proximal end of the needle tube is provided with a slot, the slot is connected with a negative pressure source, the negative pressure source is fixedly arranged at one side of the bottom of the needle tube seat, and the interface of the negative pressure source is communicated with the inside of the needle tube through the slot.The venous transfusion indwelling needle has the advantages that the structure is simple and exquisite, blood return of the blood vessel is accelerated by arranging the negative pressure source so asto quickly determine whether the catheter extends into the blood vessel correctly, and the device is convenient and quick.

Description

technical field [0001] The invention relates to the field of infusion equipment, in particular to an indwelling needle for intravenous infusion and a matching slotted needle tube. Background technique [0002] The intravenous indwelling needle is a kind of medical equipment used for intravenous infusion therapy. The indwelling needle tube of the indwelling needle of the existing intravenous indwelling needle is usually made of metal material. When performing puncture, it is necessary to judge whether the indwelling needle tube has been pierced into the patient's vein by observing whether there is blood return in the blood return cavity located in the catheter adapter. [0003] In some special cases, the patient's venous blood return speed will be slowed down. For example, in some patients, the subcutaneous fat is too thick, which will lead to slow venous blood return. A low level results in slow venous return. In general, the needle of the indwelling needle is far away fro...

AI Technical Summary

Problems solved by technology

[0003] In some special cases, the patient's venous blood return speed will be slowed down. For example, in some patients, the subcutaneous fat is too thick, which will lead to slow venous blood return. Low, resulting in slow venous return

In general, the needle of the indwelling needle is far away from the blood return cavity, and sometimes the blood pressure is too low to squeeze the blood into the blood return cavity. The time required for the blood in the patient's venous blood to flow from the needle of the indwelling needle tube to the blood return cavity is much longer than that of the medical staff. The operation time of puncturing the patient's venous blood vessel will make it difficult for the medical staff to accurately judge whether it has been punctured into the patient's venous blood vessel, resulting in repeated punctures. Since the catheter wall is very thin, repeated punctures will cause the catheter to fold and generate thrombus. Cause mechanical phlebitis, bring unnecessary pain to patients, and reduce the work efficiency of medical staff

Images