Hysteroscopic Tissue Removal Fluid Management
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Solution Overview
Problem
Existing hysteroscopic tissue removal systems face challenges in maintaining fluid distension during procedures, leading to potential blood leakage and visualization issues due to suction effects that disrupt fluid pressure, causing inefficiencies and increased risks.
Innovation Solution
The implementation of a hysteroscopic tissue removal system with a shared switch to coordinate the operation of tissue removal devices and fluid pumps, along with a delay mechanism and independently controllable vacuum sources, minimizes fluid loss and provides real-time fluid deficit monitoring through a display system, ensuring stable fluid pressure and visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If suction is applied to remove tissue during hysteroscopic resection, then tissue removal efficiency is improved, but fluid pressure stability deteriorates causing blood leakage and visualization issues
Solution Approach 1:
The system pre-loads the fluid pump with sufficient fluid volume before tissue removal begins. The pump is primed and positioned to immediately deliver fluid when suction starts, preventing pressure drops before they occur. This preliminary preparation ensures continuous fluid pressure maintenance throughout the high-suction tissue removal process.
Solution Approach 2:
The system incorporates pressure sensors that continuously monitor fluid pressure within the uterus and provide real-time feedback to the control system. When pressure deviations are detected during suction, the control system automatically adjusts pump operation to restore and maintain target pressure levels, creating a closed-loop control system that stabilizes fluid pressure despite variable suction demands.
2Stability of the object's composition
If fluid pump operates independently to maintain distension, then fluid pressure is maintained, but coordination with tissue removal device causes delays and pressure fluctuations
Solution Approach 1:
The system merges the control functions of the fluid pump and tissue removal device into a single integrated control unit. Both devices share common control circuitry and software that coordinates their operation, allowing the pump and cutter to be activated simultaneously through a single foot pedal or control interface. This eliminates sequential delays and ensures synchronized operation, maintaining fluid pressure stability while enabling efficient tissue removal.
3Reliability
If real-time fluid deficit monitoring is implemented, then patient safety is improved, but system complexity and cost increase
Solution Approach 1:
The system uses the existing fluid pump's flow meter and control system to perform dual functions: delivering distension fluid and simultaneously measuring fluid deficit. The same sensors and processors that control pump operation are also used to track and display fluid consumption and uptake. This multi-functional approach enables comprehensive patient safety monitoring without adding separate dedicated monitoring hardware, thereby limiting the increase in system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances fluid management and monitoring capabilities, reducing the risk of blood leakage and maintaining stable visualization, thereby improving the efficiency and safety of the procedure.
Implementation Method 1
maintenance of fluid pressure above the intracavity arterial pressure is highly beneficial for the maintenance of a clear visual field
Implementation Method 2
suction is typically applied to the electromechanical cutter device to draw tissue into the device and to facilitate the removal of the resected tissue from the uterus
Data Source
AI summary
A hysteroscopic tissue removal system having improved fluid management and/or monitoring capabilities. According to one embodiment, the system includes a hysteroscope and a tissue removal device, the tissue removal device being selectively operable and being removably mounted in an operating channel of the hysteroscope. The system also includes a fluid source and a fluid pump, the fluid pump being coupled to the fluid source and to a fluid input channel of the hysteroscope so as to pump fluid from the fluid source to the fluid input channel, the fluid pump being selectively operable. The system further includes a selectively operable switch, coupled to both the tissue removal device and the fluid pump, for actuating both the tissue removal device and the pump. If desired, a delay mechanism may be interposed between the switch and the tissue removal device to delay operation of the tissue removal device relative to the pump.