Venous indwelling needle for hemodialysis

Abstract

The invention discloses a venous indwelling needle for hemodialysis. The venous indwelling needle for hemodialysis comprises a steel needle, a catheter, a catheter holder, a silica-gel flexible pipe, an artery blood leading end connector and a pipe stopper. Grooves with inverted hooks are evenly formed in the outer lateral side of the front end of the steel needle; an elastic clip is installed in the pipe stopper and is used for preventing the needle from being separated from the pipe stopper in the needle withdrawing process; a butterfly wing and a flow control clip are further arranged on the catheter holder and the silica-gel flexible pipe respectively. A safe and effective needling withdrawing mode is arranged, and the danger that patients or medical staff may be stabbed in the needling withdrawing process is avoided; because the clip is added to the silica-gel flexible pipe, inconvenience and potential danger caused by vessel forceps are omitted, and the venous indwelling needle for hemodialysis is more convenient and safer to use; because the butterfly wing capable of rotating freely is arranged , punching is facilitated and fixable area is increased; the needle is more firmly fixed through adhesive tape and doe not easily fall off and the defects that an existing venous indwelling needle for hemodialysis easily falls off are overcome.

Description

technical field [0001] The invention relates to a medical device, in particular to an intravenous indwelling needle for hemodialysis. Background technique [0002] Uremic patients need hemodialysis to save their lives. Patients who undergo hemodialysis for a long time need to establish arteriovenous fistula, which is the lifeline of hemodialysis patients. However, some patients have poor blood vessel conditions due to their own diseases, and cannot establish arteriovenous fistulas and artificial vascular fistulas, and even permanent catheters cannot be established. External jugular vein puncture saved the patient's life. The intravenous indwelling needle plays an important role. [0003] At present, the most widely used in China is the intravenous indwelling needle for hemodialysis imported from Japan. This indwelling needle has the advantages of precise design and good puncture performance, but it still has the following shortcomings, such as: there is the problem of unsta...

AI Technical Summary

Problems solved by technology

However, some patients have poor blood vessel conditions due to their own diseases, and cannot establish arteriovenous fistulas and artificial vascular fistulas, and even permanent catheters cannot be established. External jugular vein puncture saved the patient's life. The intravenous indwelling needle plays an important role

[0003] At present, the most widely used in China is the intravenous indwelling needle for hemodialysis imported from Japan. This indwelling needle has the advantages of precise design and good puncture performance, but it still has the following shortcomings, such as: there is the problem of unstable fixation, and the patient's neck is twisted. It is easy to dislodge during movement, resulting in blood loss and interrupting dialysis; the silicone hose part is too short, and it is inconvenient to clamp this part with a vascular clamp before the machine is used to draw blood, and the vascular clamp is a heavy metal object, which is easy to pull Pulling the intravenous indwelling needle for dialysis will cause the needle to shift or even fall out, which will more easily pinch the patient and increase the pain of the patient

There is also the disadvantage that it is not easy to hold. The catheter seat of the indwelling needle is a tapered structure, which needs to be held firmly during use.

But the main disadvantage is that when the needle is withdrawn, the needle will be exposed from the catheter, which may pierce the hands of the patient or the medical staff, causing puncture wounds in the slightest and infection in severe cases. For this situation, the medical staff can only withdraw the needle as much as possible Slow down to avoid the rapid exposure of the needle, but the strength is not easy to control. In short, when the needle is about to be exposed, it may bring great danger to the medical staff

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