Rectal Irrigation Balloon Pressure Feedback for Safe Catheter Retention
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Solution Overview
Problem
Existing bowel irrigation systems lack the ability to control the size of the inflatable balloon during the procedure, leading to potential damage to the rectal walls due to excessive pressure and risk of balloon rupture, especially for users with sensitive or fragile rectal walls.
Innovation Solution
A bowel irrigation system with a pressure sensor and control unit that adjusts the balloon size by inflating or deflating it based on pressure thresholds, using an incompressible fluid to maintain optimal balloon volume and minimize pressure on the rectal walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the balloon is inflated to retain the catheter in the rectum, then the catheter is securely retained, but excessive pressure may damage the rectal walls or cause balloon rupture
Solution Approach 1:
The balloon is designed with a dynamic volume adjustment mechanism that allows it to adapt its size in response to peristaltic movements. When the rectum contracts during peristalsis, the balloon automatically reduces its volume to accommodate the movement and reduce pressure, preventing damage to the rectal walls while maintaining catheter retention.
Solution Approach 2:
The system incorporates pressure sensors that continuously monitor the pressure exerted by the balloon on the rectal walls. This feedback mechanism triggers automatic volume adjustment of the balloon when pressure thresholds are exceeded, ensuring safe operation while maintaining effective retention.
2Reliability
If a larger balloon is used to ensure secure retention, then the catheter is more securely held in place, but the risk of balloon rupture and damage to rectal walls increases
Solution Approach 1:
Rather than using a permanently large balloon that constantly exerts high pressure, the system employs a dynamically adjustable balloon that inflates to an optimal size for retention and automatically reduces its volume in response to rectal movements or pressure increases, thereby maintaining security while reducing rupture risk.
Solution Approach 2:
The balloon's volume parameter is made variable rather than fixed. The system changes the balloon's volume based on real-time conditions such as peristaltic activity and pressure levels, allowing it to provide secure retention when needed while minimizing stress on the balloon material and rectal walls.
3Object-affected harmful factors
If the balloon volume is automatically adjusted during peristalsis, then pressure on rectal walls is reduced, but the system complexity increases
Solution Approach 1:
The system uses pressure sensors to monitor rectal wall pressure and automatically adjusts balloon volume in response to detected peristaltic movements. This feedback loop enables the balloon to adapt to physiological conditions without requiring complex external control systems, as the adjustment is triggered automatically by the body's own movements.
Solution Approach 2:
The balloon system essentially serves itself by using the body's natural peristaltic movements as the trigger for volume adjustment. The peristalsis itself provides the signal that initiates the deflation process, eliminating the need for external monitoring or control intervention.
4Device complexity
If manual intervention is required to adjust balloon size, then system complexity is reduced, but continuous monitoring and adjustment capability is lost
Solution Approach 1:
The system incorporates pressure sensors and control algorithms that continuously monitor rectal wall pressure and automatically adjust balloon volume accordingly. This eliminates the need for manual intervention while maintaining reliable pressure control, as the system responds in real-time to changing physiological conditions.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated control system that uses sensors and fluid management mechanisms to adjust balloon volume. This substitution of manual operation with an automated system maintains simplicity while enhancing the reliability and continuous monitoring capability of the pressure control function.
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
The system effectively manages balloon size to prevent excessive pressure on the rectal walls and reduces the risk of balloon rupture, ensuring a safe and controlled bowel irrigation process without medical intervention.
Implementation Method 1
a pressure sensor adapted for assessing a pressure inside the balloon
Implementation Method 2
using an incompressible fluid to maintain optimal balloon volume and minimize pressure on the rectal walls
Data Source
AI summary
A method for deflating an expandable balloon of an irrigation catheter is disclosed where the expandable balloon is deflated if a pressure inside of the expandable balloon is greater than a threshold pressure.