Flexible ureteroscope leading-in sheath with adjustable tube diameter and capable of displaying tube diameter

Abstract

The invention discloses a flexible ureteroscope leading-in sheath with an adjustable tube diameter and capable of displaying the tube diameter. The flexible ureteroscope leading-in sheath comprises acatheter body with a tube cavity, the catheter body is arranged to be an arc-shaped piece with a first opening edge and a second opening edge, and an overlapping area is formed between the first opening edge and the second opening edge; the first end of the catheter body is provided with an adjusting assembly used for controlling the inner diameter of a catheter cavity of the catheter body, and the adjusting assembly is connected with the catheter body. The adjusting assembly comprises a first arc-shaped operating rod arranged at the first end of the arc-shaped piece and a rotating wheel arranged at the first end of the first arc-shaped operating rod. Medical staff operate the rotating wheel clockwise or anticlockwise to achieve the purpose that the pipe diameter of the catheter body is increased or decreased according to actual use requirements.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a flexible ureteroscope introduction sheath with adjustable diameter and display diameter. Background technique [0002] The flexible ureteroscope technology is a new technology for upper ureteral stones and kidney stones. During the operation, the sheath needs to be introduced as a tunnel to assist the flexible mirror to enter the surgical site. At present, the difficulties in domestic and foreign literature reports lie in the following points: [0003] 1. It is necessary to indwell a ureteral stent in the patient before the operation to promote the passive expansion of the ureter, so as to increase the success rate of inserting the sheath during the soft mirror operation. However, during the indwelling period of the ureteral stent, the patient needs to endure normal complications such as frequent urination, urgency, low back pain, hematuria, etc. , and the ...

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Problems solved by technology

[0003] 1. It is necessary to indwell a ureteral stent in the patient before the operation to promote the passive expansion of the ureter, so as to increase the success rate of inserting the sheath during the soft mirror operation. However, during the indwelling period of the ureteral stent, the patient needs to endure normal complications such as frequent urination, urgency, low back pain, hematuria, etc. , and the placement of a ureteral stent requires at least 20,000 yuan, which is expensive;

[0004] 2. At present, some experts hope to bypass the step of indwelling ureteral stents and perform flexible mirror surgery directly. However, the failure rate of inserting a corresponding size sheath during the operation is relatively high, which will also frustrate the experts’ sense of surgical experience, and patients have to Facing the fact that the soft mirror lithotripsy cannot be performed for the first time; in addition, during the operation, the operation must be billed according to the fact that the surgical instrument is opened, which increases the patient's operation cost and clinical treatment cycle, so that the patient not only has to bear the high operation cost , also adds Heal Pain

[0005] 3. At present, there are different types of ureteral sheaths in clinical practice, single-use, from 12F to 16F, experienced experts have found a new way, and gradually adopt the order of expansion from small to large during the operation, and gradually expand the inner diameter of the ureter manually. A certain percentage of success rate, but due to repeated entry and exit of the dilated ureter, there will be risks of complications such as perforation, rupture, bleeding, mucosal avulsion, ureteral spasm, and postoperative scar stenosis. Difficulty in reimbursement by medical insurance; In addition, there are also problems such as intraoperative risks and short-term and long-term complications after surgery, and there are multi-factor uncertainties

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