CN-121987133-A - Ureteral soft lens sheath system

CN121987133ACN 121987133 ACN121987133 ACN 121987133ACN-121987133-A

Abstract

The invention discloses a ureteroscope sheath system which comprises an outer sheath tube, an intelligent control host and a negative pressure drainage pipeline. The inner wall of the far end of the outer sheath tube is provided with a groove, a pressure detection unit is embedded in the groove, the surface of the pressure detection unit is covered with a permeable pressure protection film, and a signal wire is connected with an intelligent control host through a signal transmission channel in the wall of the outer sheath tube. The negative pressure drainage pipeline is communicated with a negative pressure interface at the proximal end of the outer sheath. The intelligent control host receives the real-time pressure value, compares the real-time pressure value with a preset upper limit threshold value and a preset lower limit threshold value, and then controls the output of the adjustable negative pressure source or controls the action of the pressure relief unit, and outputs an alarm signal in a continuous abnormal state. The invention can realize real-time monitoring and dynamic regulation of intra-renal pelvis pressure in operation and give consideration to drainage, pressure management and abnormality prompt.

Inventors

ZHAO JIANMING
FU WEIJUN
LI XUECHAO
DONG JINKAI
FU CHENGWEI
ZHAO BAOBO
YANG TAO
KONG LINGSHENG

Assignees

中国人民解放军总医院第五医学中心

Dates

Publication Date: 20260508
Application Date: 20260320

Claims (9)

1. A ureteroscope sheath system is characterized by comprising an outer sheath tube, an intelligent control host and a negative pressure drainage pipeline; The inner wall of the far end of the outer sheath tube is provided with a groove, a pressure detection unit for detecting the fluid pressure in the renal pelvis is embedded in the groove, and a signal wire of the pressure detection unit is led to the intelligent control host through a signal transmission channel arranged in the wall of the outer sheath tube; One end of the negative pressure drainage pipeline is communicated with a negative pressure interface at the proximal end of the outer sheath pipe, and the other end of the negative pressure drainage pipeline is communicated with a waste liquid collecting part; The intelligent control host is connected with the pressure detection unit, and comprises a central processing unit and an adjustable negative pressure source, wherein the central processing unit is used for receiving a real-time pressure value fed back by the pressure detection unit and comparing the real-time pressure value with a preset upper limit threshold value and a preset lower limit threshold value so as to control the output of the adjustable negative pressure source.
2. The ureteroscope sheath system according to claim 1, characterized in that the pressure detection unit is a fiber-optic pressure sensor or a MEMS microelectromechanical pressure sensor.
3. The ureteroscope sheath system according to claim 1, characterized in that the pressure detection unit surface is covered with a biocompatible transparent pressure protection film, and the depth of the groove is greater than the thickness of the pressure detection unit so that the pressure detection unit is not higher than the outer sheath inner wall surface.
4. The ureteroscope sheath system according to claim 1, characterized in that the intelligent control host also comprises a human-computer interaction interface for displaying a real-time renal pelvis pressure curve and for setting the upper and lower thresholds.
5. The ureteroscope sheath system according to claim 1, characterized in that, The intelligent control host also comprises a pressure relief unit; The central processing unit is used for controlling the adjustable negative pressure source to increase the suction power when the real-time pressure value is larger than or equal to the upper limit threshold value, controlling the adjustable negative pressure source to maintain the current basic negative pressure or the preset normal stone negative pressure when the real-time pressure value is larger than or equal to the lower limit threshold value and smaller than the upper limit threshold value, and controlling the adjustable negative pressure source to stop working or controlling the pressure relief unit to relieve pressure when the real-time pressure value is smaller than or equal to the lower limit threshold value.
6. The ureteroscope sheath system according to claim 5, characterized in that, The intelligent control host also comprises an alarm module; The central processing unit executes a pressure feedback control algorithm, and adjusts the suction power of the adjustable negative pressure source according to the deviation between the real-time pressure value and a preset threshold value, wherein the pressure feedback control algorithm is a proportional integral differential PID control algorithm; And when the real-time pressure value is continuously higher than the upper limit threshold value for a preset time after the adjustable negative pressure source reaches the maximum output, the central processing unit controls the alarm module to output an alarm signal.
7. A control method based on the ureteral soft-lens sheath system according to any of claims 1 to 6, characterized by comprising the following steps: S1, setting an upper limit threshold and a lower limit threshold; S2, acquiring a real-time pressure value in the renal pelvis by a pressure detection unit arranged in a groove on the inner wall of the distal end of the outer sheath tube, and transmitting the real-time pressure value to an intelligent control host through a signal transmission channel in the wall of the outer sheath tube; S3, comparing the real-time pressure value with the upper limit threshold value and the lower limit threshold value by the central processing unit; and S4, the central processing unit adjusts the output of the adjustable negative pressure source according to the comparison result, or controls the pressure relief unit to relieve pressure.
8. The control method according to claim 7, characterized in that step S4 includes: when the real-time pressure value is larger than or equal to the upper limit threshold value, the central processing unit controls the adjustable negative pressure source to increase the suction power until the real-time pressure value is reduced below the upper limit threshold value; when the real-time pressure value is larger than the lower limit threshold value and smaller than the upper limit threshold value, the central processor controls the adjustable negative pressure source to maintain the current basic negative pressure or the preset normal lithotriptic negative pressure; when the real-time pressure value is smaller than or equal to the lower limit threshold value, the central processing unit controls the adjustable negative pressure source to stop working or controls the pressure relief unit to relieve pressure.
9. The control method according to claim 8, wherein, In step S4, the central processing unit executes a pressure feedback control algorithm, and adjusts the suction power of the adjustable negative pressure source according to the deviation between the real-time pressure value and a preset threshold value, where the pressure feedback control algorithm is a proportional-integral differential PID control algorithm; and when the real-time pressure value is continuously higher than the upper limit threshold value for a preset time after the adjustable negative pressure source reaches the maximum output, the central processing unit controls the alarm module to output an alarm signal.

Description

Ureteral soft lens sheath system Technical Field The invention relates to the technical field of medical instruments and medical informatization, in particular to a ureteral soft lens sheath system. Background The ureteroscope lithotripsy is a common minimally invasive operation for treating kidney stones and ureteral upper-section stones. Physicians often need to continually perfuse fluids into the renal pelvis during surgery to maintain the surgical field clear and assist in lithotripsy and lithotripsy procedures. The renal pelvis belongs to a relatively confined cavity. After perfusate accumulation, the pressure in the renal pelvis tends to rise. The existing ureteroscope sheath is mainly used for establishing an instrument channel and a drainage channel. Existing devices often lack the ability to sense intra-operative renal pelvis pressure in real time. It is difficult for doctors to know the pressure change condition in time. The sheath body with the adsorption function can drain, but the negative pressure regulating mode is mostly constant negative pressure output or manual regulation. This type of approach is not responsive enough to intra-operative pressure changes. When the attractive force is too great, the renal pelvis mucous membrane may be sucked into the sheath mouth, and the local intra-cavity space may also be reduced. When the attractive force is too small, the high-pressure state is not easy to be relieved in time, and the broken stone powder and the flushing liquid are not easy to be discharged in time. Accordingly, there is a need to provide a new ureteral soft lens sheath system. The system should be capable of detecting the pressure within the renal pelvis in real time during the procedure and adjusting the suction strength of the negative pressure based on the detection results to allow for pressure control, drainage efficiency and field maintenance. According to the invention, a pressure detection unit is embedded in a groove on the inner wall of the distal end of an outer sheath tube, a pressure signal is led to an intelligent control host machine through a signal transmission channel in a tube wall, closed-loop regulation is carried out simultaneously by combining a preset upper limit threshold value and a preset lower limit threshold value, negative pressure can be stopped or pressure relief is carried out in a low pressure state, and an alarm can be triggered when the pressure is still continuously exceeded after an adjustable negative pressure source reaches the maximum output, so that the pressure monitoring and regulating function is realized. Disclosure of Invention Aiming at the problems in the prior art, the invention aims to provide a ureteral soft lens sheath system. A ureteroscope sheath system is characterized by comprising an outer sheath tube, an intelligent control host and a negative pressure drainage pipeline; The inner wall of the far end of the outer sheath tube is provided with a groove, a pressure detection unit for detecting the fluid pressure in the renal pelvis is embedded in the groove, and a signal wire of the pressure detection unit is led to the intelligent control host through a signal transmission channel arranged in the wall of the outer sheath tube; One end of the negative pressure drainage pipeline is communicated with a negative pressure interface at the proximal end of the outer sheath pipe, and the other end of the negative pressure drainage pipeline is communicated with a waste liquid collecting part; The intelligent control host is connected with the pressure detection unit, and comprises a central processing unit and an adjustable negative pressure source, wherein the central processing unit is used for receiving a real-time pressure value fed back by the pressure detection unit and comparing the real-time pressure value with a preset upper limit threshold value and a preset lower limit threshold value so as to control the output of the adjustable negative pressure source. Preferably, the pressure detection unit is an optical fiber pressure sensor or a MEMS microelectromechanical pressure sensor. By the technical scheme, the invention can realize real-time detection of the pressure in the renal pelvis and improve the sensitivity and stability of pressure detection. The optical fiber pressure sensor or the MEMS microcomputer voltage sensor is small in size and convenient to set at the inner wall of the distal end of the outer sheath tube, and meanwhile, can respond to pressure change quickly, so that a reliable pressure signal foundation is provided for subsequent negative pressure adjustment. Specifically, the optical fiber pressure sensor has the characteristics of small size and strong electromagnetic interference resistance, and is suitable for being arranged in a structure with limited space such as a ureteral soft lens sheath. The MEMS micro-electromechanical force sensor also has the characteristics of miniaturization and is convenient f