Surgical Fluid Pump Control with Pressure Feedback
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Solution Overview
Problem
Current fluid management pump systems for surgical procedures face challenges in efficiently regulating fluid flow and pressure during endoscopic and arthroscopic surgeries, particularly in minimizing tissue damage and infection risk while maintaining clear surgical sites.
Innovation Solution
The development of a pump system with integrated inflow and outflow cassettes and a control unit that uses peristaltic tubing and pressure feedback mechanisms to precisely control fluid flow, incorporating RF chips for real-time system adjustments and communication, and a foot pedal or remote control for surgeon input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If fluid management pump systems are used to pump sterile solution into surgical sites to expand and separate tissue, then the field of view and space for manipulating instruments are increased, but tissue damage and infection risk are minimized only through precise control of fluid flow and pressure
Solution Approach 1:
The control unit receives real-time feedback from the pressure transducer monitoring fluid pressure at the surgical site and automatically adjusts pump actuation and valve state to maintain pressure within a target range, preventing tissue damage while ensuring adequate surgical space
Solution Approach 2:
The system automatically regulates its own fluid flow and pressure without continuous manual intervention, with the control unit autonomously adjusting pump and valve settings based on pressure feedback to maintain optimal surgical conditions
2Productivity
If peristaltic tubing is used to pump fluid, then fluid flow can be controlled, but the system complexity increases due to integration of pump unit, control unit, and pressure transducer
Solution Approach 1:
The pump unit, control unit, and pressure transducer are integrated into a single cohesive system where the control unit centrally manages both pump actuation and valve control based on pressure feedback, reducing operational complexity despite increased component integration
Solution Approach 2:
The control unit serves multiple functions simultaneously - it controls pump actuation, regulates valve state, and processes pressure feedback signals, making the system more efficient despite the multi-functional design
3Measurement precision
If pressure feedback mechanism is implemented to regulate pump actuation, then fluid pressure control is improved, but the device complexity and cost increase
Solution Approach 1:
The pressure transducer continuously monitors fluid pressure and feeds this information back to the control unit, which automatically adjusts pump actuation to maintain pressure within the target range, achieving precise control through a straightforward feedback loop
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 system enhances surgical precision by maintaining optimal fluid flow and pressure, reducing tissue damage, and minimizing infection risks through precise control and real-time adjustments, thereby improving surgical outcomes.
Implementation Method 1
a peristaltic pump configured to push the surgery washing fluid through the peristaltic tubing into the body cavity
Implementation Method 2
a pressure transducer configured to sense a pressure of the surgery washing fluid in the body cavity
Data Source
AI summary
A surgical pump system arrangement receives an inflow cassette and provides fluid flow to a surgical site in a joint of a patient. The arrangement calculates load coefficients for a pressure loss curve based on an identified inflow cannula and an identified endoscope utilized therewith. The arrangement determines if the cannula is disposed at a surgical site and if adequate fluid flow is provided. Further, the arrangement determines if the inflow cannula and endoscope are properly identified. The arrangement integrates with an identified or unidentified surgical device to adjust pump operation when the surgical device is operating. The arrangement maps actuators disposed on a surgical handpiece or footswitch to control operation of the pump system, including providing suction to an outflow path of a surgical device that is not operating. The arrangement also determines when an inflow pump cassette is not properly inserted into the pump.