Locally expanding balloon catheter

Abstract

The invention discloses a locally expanding balloon catheter, comprising a catheter body, wherein the middle part of the catheter body is sleeved with an expanding capsule body the wall of which is connected with the catheter body in a sealing manner; a fluid passage is arranged in the catheter body, the front port of the fluid passage is communicated with the expanding capsule body, the tailing port of the fluid passage extends to the tailing end face of the catheter body, and a first one-way valve is arranged at the tailing part of a first fluid passage. The invention has moderate thickness, can provide sufficient support and expansion and does not generate excessive pressure on urethra mucosa and external orifice of urethra to cause patients to fell discomfort or even cause new iatrogenic stenosis. The invention is a thinner silicone catheter before fluid is injected into the expanding capsule, and can expand to a required size after a certain amount of fluid is injected. The invention can play the role of local hemostasis by compression at early period after surgery, and has the functions of local intermittent expansion during the period of catheter retention.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a locally expanded balloon urinary catheter. Background technique [0002] 1.1 Incidence of urethral stricture [0003] Urethral stricture after urethral injury is a headache for patients and headaches for urologists, and its treatment is also one of the common and challenging problems faced by urologists. Urethral injuries are most common in the bulbar urethra (anterior urethra) and the membranous urethra (posterior urethra). There are many surgical methods for the treatment of the two, but the literature reports that various surgical methods have a relatively high incidence of urethral stricture after surgery . Therefore, reducing the incidence of urethral stricture is a difficult problem that we must work hard to overcome. [0004] Urethral bulb injuries are mostly caused by straddling injuries. The traditional open urethral anastomosis is simple and easy, but the disadvantage is th...

AI Technical Summary

Problems solved by technology

[0010] At present, F18-F20 three-chamber balloon catheters are routinely indwelled after adult male urethral injuries. If the indwelling catheter is too thin, it will not have enough support and dilation effect on the injured part of the urethra, and it will inevitably cause narrowing of the injured part on the basis of scar contracture. ring, resulting in thin urine stream and difficulty urinating after catheter removal

And if the indwelling catheter is too thick, patients often cannot persist for 8 weeks due to the oppression and discomfort caused by the catheter to the anterior urethra (especially to the external opening of the urethra), and it is easy to pull out the three-chamber balloon catheter too early. Urethral stricture after urethral injury

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