Device For Continuously Irrigating And Draining Human Or Animal Body Tissues Or Cavities

What is this patent about?

'422 is related to the field of medical devices, specifically addressing the need for a versatile system for irrigating and draining tissues during endoscopic procedures. The background highlights the limitations of existing solutions, which often require specialized equipment for different procedures, leading to increased costs, storage problems, and sterilization challenges in operating rooms. The invention aims to provide a universal apparatus adaptable to various surgical needs.

The underlying idea behind '422 is to create a modular system where a reusable control unit drives a disposable cassette containing the fluid pathways and procedure-specific settings. This is achieved by having a permanent module with motors and controls that interface with a removable cassette containing peristaltic pumps and fluid conduits. The cassette also incorporates a coding mechanism to inform the control unit about the specific surgical procedure being performed, allowing for automated adjustments of pump parameters.

The claims of '422 focus on a device for continuous irrigation and drainage during endoscopic procedures, comprising a permanent module and a removable cassette. The permanent module includes a motor, a control circuit for the motor, and a means for connecting the motor to a pump. The removable cassette includes at least one inlet duct connected to a supply of physiological irrigation liquid, at least one outlet duct to evacuate the liquid from the operating zone, preprogrammed means for providing specific information relating to the type of procedure to the circuit controlling the motor, and preprogrammed means for providing specific information relating to the procedure accomplished to the circuit controlling the motor.

In practice, the surgeon selects a cassette tailored to the specific endoscopic procedure (e.g., arthroscopy, urology). The cassette is then inserted into the permanent module, where a coding device on the cassette (e.g., a protruding element or a memory device) is read by the module. This coding informs the control circuit about the required pressure, flow rate, and other parameters for the procedure, automatically adjusting the peristaltic pumps accordingly. The system can include two pumps for simultaneous irrigation and drainage, maintaining a controlled fluid environment in the surgical area.

The key differentiation from prior approaches lies in the modular design and the automated procedure-specific settings. Existing systems often require manual adjustments or entirely separate devices for different procedures. By integrating the fluid pathways and procedure-specific information into a disposable cassette, '422 reduces the need for multiple devices, simplifies setup, and minimizes the risk of cross-contamination. Furthermore, the inclusion of security measures to prevent reuse of the cassette ensures sterility and patient safety, addressing a critical concern in surgical environments.