Percutaneous renal puncture needle capable of avoiding vascular injury

Abstract

The invention relates to a percutaneous renal puncture needle capable of avoiding vascular injury. The percutaneous renal puncture needle comprises a needle sheath and a needle core; the needle sheathis of a columnar structure of which the interior is hollow and the two ends are open; the front end of the needle sheath is in a round head shape; the needle core is built in the needle sheath; and the length of the needle core is greater than that of the needle sheath. The percutaneous renal puncture needle has the beneficial effects: when the puncture needle passes through hypovascular zones including a cortical zone, a subcutaneous fat zone, a muscular layer zone, a renal fascia zone, an adipose capsule zone and the like, the needle core goes in advance, and quickly passes through the zones by utilizing the pointed end characteristic; when the puncture needle passes through the cortical zone (rich in small vessel), the needle sheath goes in advance, and small vessels are not damaged byutilizing the round head characteristic; when puncture needle passes through a kidney calices zone to a calculus zone, the protruding state of the needle core is restored to complete a puncture process; and in the process of actual clinical percutaneous renal puncture, the risk of intraoperative and postoperative bleeding can be lowered, and the success rate of surgery and patient prognosis are improved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a percutaneous renal puncture needle capable of avoiding blood vessel damage. Background technique [0002] Percutaneous nephrolithotomy is a minimally invasive method for the treatment of kidney and upper ureteral calculi. It uses a percutaneous renal tunnel (a channel that penetrates the renal pelvis and calyces) for intracorporeal lithotripsy and stone removal. Compared with the traditional "surgery and stone extraction", this method does less damage to the patient, and only needs a small hole of about 1cm to complete the entire percutaneous kidney lithotripsy, and the curative effect and patient prognosis have been greatly improved compared with the previous ones, but Percutaneous nephrolithotomy is a very technical operation. [0003] Clinically, even experienced clinicians will inevitably damage the small blood vessels in the kidney during the puncture process. This is the r...

AI Technical Summary

Problems solved by technology

The reason is that the kidney itself is rich in small blood vessels, and in the cortical area of ​​the kidney, there are many small arteries and small veins with disordered shape; The front end is oblique tip type, this structural feature leads to its strong penetrating power and great destructive power to small blood vessels

Therefore, the traditional puncture needle will aggravate the patient's kidney damage and increase the chance of intraoperative and postoperative bleeding

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