Minimally invasive bladder sampling device

Abstract

The invention discloses a minimally invasive bladder sampling device which is characterized by comprising an outer sleeve, an inner sleeve, a left expansion film, a right expansion film, a switching handle, a sampling needle structure and a camera, wherein the middle and the lower portion of the outer sleeve are both straight pipes with circular cross sections; the left portion and the right portion of the upper portion of the outer sleeve are cut off, so that only a front segment and a rear segment in the front-back direction are left at the upper portion of the outer sleeve; the inner sleeve is coaxially sleeved with the outer sleeve; the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve; the middle and the lower portion of the inner sleeve are both straight pipes with circular cross sections; the left half portion of the upper portion of the inner sleeve is cut off, so that only a half pipe ring is left at the upper portion of the inner sleeve; the front end of the outer sleeve and the front end of the inner sleeve are fixedly connected with a pipe head body; the pipe head body is a ring body; and an inner ring of the pipe head body is the same in diameter with an inner cavity of the inner sleeve and is aligned with the inner cavity of the inner sleeve. The minimally invasive bladder sampling device has the advantages of small damage to bladders and difficulty in causing the urethral injury.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a minimally invasive bladder sampling device. Background technique [0002] Bladder cancer refers to malignant tumors that occur on the bladder mucosa. It is the most common malignant tumor of the urinary system and one of the ten most common tumors in the whole body. It accounts for the first place in the incidence of urogenital tumors in my country, and ranks second in the West after prostate cancer. In 2012, the incidence rate of bladder cancer in the national tumor registration area was 6.61 / 100,000, ranking ninth in the incidence rate of malignant tumors. Bladder cancer can occur at any age, even in children. Its incidence rate increases with age, and the highest incidence age is 50-70 years old. The incidence of bladder cancer in men is 3-4 times that of women. [0003] In the diagnosis of bladder tumors, biopsy is a very important means of diagnosis. At pr...

AI Technical Summary

Problems solved by technology

Both of these two methods need to make double channels in the outer sleeve, one channel is used to penetrate the camera, and the other channel is used to penetrate the biopsy forceps or electric cutter. High incidence of urethral injury

In addition, the use of biopsy forceps and point cutters to obtain biopsy samples will cause extensive trauma to the bladder. Using biopsy needles instead of biopsy forceps and electric cutters can effectively reduce the trauma to the bladder. However, because the biopsy needle itself is thick, its It also needs a separate channel to enter the bladder, and the size of the outer cannula is not smaller than the above two biopsy methods. Secondly, because the biopsy needle obtains samples by repeatedly piercing the lesion, the biopsy samples are obtained by negative pressure suction. Because the bladder itself is elastic and the biopsy needle has no supporting point in the bladder, it is very easy to puncture the bladder with a biopsy needle, resulting in bladder perforation. Therefore, the puncture needle is rarely used in bladder biopsy sampling

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