Adjustable percutaneous nephrolithotomy operation sheath

Abstract

The invention discloses an adjustable percutaneous nephrolithotomy operation sheath which comprises a tubular sheath body. The sheath body comprises an outermost layer ring body and an inner layer ring body, the outermost layer ring body is meshed with the inner layer ring body through threads, and the outermost layer ring body is screwed in different directions relative to the inner layer ring body. Due to the thread meshed relation, the working cross-section diameter of the sheath body is decreased or enlarged, and under the decreased state of the working cross-section diameter of the sheath body, the inner layer ring body protrudes forwards relative to the outermost layer ring body. By means of the adjustable percutaneous nephrolithotomy operation sheath, after the cross-section diameter of the operation sheath is adjusted to be properly small, the operation sheath enters kidney calices or the upper ends of nephric ducts, so that calculi can be crushed and taken out, operating is safe and reliable, the operation efficiency can be improved, and operation time is shortened.

Description

technical field [0001] The invention relates to an intracorporeal lithotripsy surgical instrument, in particular to an adjustable percutaneous renal operation sheath. Background technique [0002] Percutaneous nephrolithotomy is commonly known as "hole stone removal", see figure 1 , which makes an incision of about 0.5 cm through the patient’s waist to establish a stone removal channel from the skin to the kidney, inserts the nephroscope through the operating sheath 6, and removes the renal pelvis stones 5, especially Cast stones are crushed and then taken out. The stone removal rate is high, the trauma left on the patient is minimal, and there is less bleeding. The average operation time is 30 minutes, and the patient can get out of bed 3-5 days after the operation. However, for patients with calyceal calculi4 or upper ureteral calculi7, it may be impossible to enter the calices or upper ureter due to the fixed circumference of the traditional operation sheath, especially...

AI Technical Summary

Problems solved by technology

However, for patients with calyceal calculi4 or upper ureteral calculi7, it may be impossible to enter the calices or upper ureter due to the fixed circumference of the traditional operation sheath, especially when the calyx neck is narrowed or the ureter is relatively narrow, if the patient is forced to enter The side may cause calices neck tear or ureteral perforation

Images