Repeating crossbow type prostate puncture gun capable of adjusting puncture depth

Abstract

The invention relates to a repeating crossbow type prostate puncture gun capable of adjusting the puncture depth, and belongs to the technical field of medical instruments. Comprising a skin breaking needle, a detachable puncture needle, a needle core, a limiter, a bore, a supporting plate, a gun retreating bolt, a loading device, a firing device, a safety device and a needle bin. A skin breaking needle is fixed to one end of the supporting plate, a puncture needle penetrating through a needle core is arranged in the skin breaking needle, and the length of the puncture needle is smaller than that of the needle core. Baffle-shaped bulges are respectively arranged at the rear ends of the puncture needle and the needle core; a bore, a gun withdrawing bolt, a loading device and a firing device corresponding to the baffle-shaped bulges are arranged on the plate surface of the supporting plate; a limiter for adjusting the puncture depth is arranged at the front end of the supporting plate; the supporting plate is further provided with a puncture needle moving-out device and a needle bin used for storing and releasing puncture needles one by one. One end of the needle core close to the needle tip is provided with a tissue groove; by means of the puncture gun, the puncture depth can be adjusted, needle passage planting can be prevented, and rapid puncture can be achieved.

Description

technical field [0001] The invention relates to a continuous crossbow type prostate puncture gun with adjustable puncture depth, belonging to the technical field of medical instruments. Background technique [0002] In recent years, the incidence of prostate cancer in my country has been increasing year by year. Unlike other tumors, prostate cancer is scattered in multiple foci in the prostate gland. It is often impossible to diagnose by CT, MRI and other imaging methods. The diagnosis requires prostate biopsy. Diagnosed. About 20%-30% of elderly patients with elevated prostate-specific antigen (PSA) are diagnosed with prostate cancer by biopsy. At present, prostate biopsy is mostly a 12-needle systematic puncture. Even so, there are still some patients whose cancer tissue has not been obtained, and as the PSA continues to rise significantly, a second puncture is required. In the prior art, the prostate puncture needle is a stainless steel needle with an outer diameter of ...

AI Technical Summary

Problems solved by technology

Prostate puncture needles in the prior art have the following defects: (1) the puncture distance cannot be adjusted, and the length of the tissue strip is fixed

The size of the prostate varies greatly. For small prostates, since the ejection distance of the puncture needle is not adjustable, the puncture distance is relatively long, which may damage the urethra, cause hematuria, damage the rectum, and cause infection

For those with a large prostate volume, the puncture distance is relatively short, and the proportion of tissue to be obtained is relatively small, leaving a large number of puncture blind spots

(2) There is a risk of needle tract planting; after the current puncture needle takes out the tissue, the needle needs to be pulled out completely, and the tissue strip is put into the fixative, and then the needle is inserted again for the next puncture

Although there is still no clinical experiment to confirm the evidence of prostate puncture needle tract metastasis, this possibility does exist in theory

(3) The overall puncture time is long; prostate puncture is characterized by a large number of puncture needles, and each patient has no less than 12 needles

(4) It is not conducive to material saving and environmental protection; most of the current puncture needles are one-piece disposable, consisting of puncture needles, needle cores, springs, and plastic handles, which are discarded after use, resulting in waste of materials and environmental pollution

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