Insufflation Device Pressure Stabilization via Feedback Control
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Solution Overview
Problem
In laparoscopic surgery, existing insufflation devices face challenges in maintaining a stable intra-abdominal pressure due to the inability to accurately adjust gas feeding and discharging rates, leading to fluctuations in pressure during gas feeding and discharging processes.
Innovation Solution
An insufflation device equipped with a processor that measures gas feeding and discharging time periods and adjusts the gas feeding flow rate based on the difference between these periods, ensuring a predetermined intra-abdominal pressure is maintained by calculating the gas discharging time period and adjusting the gas feeding flow rate accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gas feeding is performed at a constant flow rate without adjustment, then gas feeding is simple to control, but intra-abdominal pressure fluctuates due to mismatch between gas feeding and discharging time periods
Solution Approach 1:
The processor measures the actual intra-abdominal pressure and the gas feeding time period, then uses this feedback information to calculate the appropriate gas discharging time period and adjust the gas feeding flow rate. This closed-loop feedback mechanism ensures pressure stability while maintaining ease of operation through automatic adjustment.
Solution Approach 2:
The gas feeding flow rate is dynamically adjusted based on the difference between measured and calculated time periods. The system transitions from static constant flow rate control to dynamic adaptive control, allowing the gas feeding rate to change in real-time according to actual pressure conditions and discharging characteristics.
2Adaptability or versatility
If gas discharging time period is used to adjust gas feeding-discharging balance, then gas discharging amount can be adapted to different suction equipment capabilities, but precise control of intra-abdominal pressure is difficult
Solution Approach 1:
The system measures actual intra-abdominal pressure and uses this feedback to precisely calculate the required gas discharging time period. This feedback-based calculation ensures precise pressure control while adapting to different suction equipment capabilities by adjusting the discharging duration accordingly.
Solution Approach 2:
The system changes the gas discharging time period parameter based on measured pressure values and equipment characteristics. By dynamically adjusting this temporal parameter, the system achieves both adaptability to different suction equipment and precise control of intra-abdominal pressure.
3Productivity
If intermittent gas feeding is performed with predetermined time periods, then gas feeding amount can be controlled, but intra-abdominal pressure may not reach or maintain set pressure
Solution Approach 1:
The processor continuously measures intra-abdominal pressure and uses this feedback to determine whether to continue or stop gas feeding. This feedback mechanism ensures that the set pressure is reliably reached and maintained, while still maintaining efficient intermittent feeding operations.
Solution Approach 2:
The system automatically adjusts gas feeding duration and flow rate based on real-time pressure measurements, making the pressure control self-regulating. This self-service capability ensures reliable pressure maintenance without requiring manual intervention, while maintaining high feeding efficiency through optimized timing.
Data Source
AI summary
An insufflation device includes: a gas feeding conduit for feeding a predetermined gas which is fed from a gas supply source into a body cavity; and a processor. The processor measures a gas feeding time period until a predetermined amount of the gas is fed according to a set pressure, measures a pressure in the body cavity, calculates a gas discharging time period based on the set pressure and a measurement result of the measured pressure; and adjusts a gas feeding flow rate of the gas according to a difference between the measured gas feeding time period and the calculated gas discharging time period.