Cystotomy Catheter Capture Device Balloon Anchoring
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Solution Overview
Problem
Current suprapubic catheter placement devices are inadequate, particularly in women, due to short 'throw' lengths making it difficult to pass the device through the abdominal wall, and existing methods are cumbersome and prone to complications like catheter loss or perforation, leading to reliance on urethral catheterization instead.
Innovation Solution
A catheter capture device with a longer 'throw' and a modified trocar tip suitable for passing over a wire, allowing easy traversal through the abdominal wall and bladder, featuring a balloon that inflates to securely couple with the catheter, facilitating reliable suprapubic catheter placement without the need for an abdominal incision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a suprapubic catheter placement device is used with a short throw length, then the device structure remains compact, but it becomes difficult to pass the device through the abdominal wall
Solution Approach 1:
The device is divided into multiple segments including a introducer needle, an expandable balloon, and a catheter. The introducer needle passes through the abdominal wall first, then the balloon expands within the bladder to provide anchoring, allowing the catheter to be advanced through the created tract. This segmentation allows each component to perform its specific function in sequence, overcoming the limitation of short throw length.
Solution Approach 2:
An expandable balloon serves as an intermediary element between the introducer needle and the final catheter position. The balloon is deployed within the bladder through the needle tract and inflated to create a anchoring mechanism and expand the tract, facilitating catheter passage through the abdominal wall even when the initial puncture device has limited length.
2Reliability
If existing catheter placement methods are used, then the procedure can be performed, but complications such as catheter loss or perforation occur
Solution Approach 1:
The expandable balloon is deployed within the bladder before final catheter fixation to create a cushioning effect. The inflated balloon provides a safety buffer that prevents accidental perforation during catheter advancement and secures the catheter position to prevent loss, addressing potential complications before they occur.
Solution Approach 2:
The device incorporates visual or tactile feedback mechanisms that allow the operator to confirm proper catheter placement and balloon expansion within the bladder. This feedback ensures the catheter is correctly positioned before removal of the introducer needle, preventing complications from improper placement.
3Ease of operation
If urethral catheterization is used instead of suprapubic catheter placement, then the procedure is simpler, but patient comfort decreases and long-term management becomes less desirable
Solution Approach 1:
The suprapubic catheter placement device is designed to be self-contained and self-explanatory, with integrated components that guide the operator through the procedure. The expandable balloon automatically anchors the catheter once inflated, reducing the need for complex manual manipulation and making the procedure as straightforward as urethral catheterization while providing the benefits of suprapubic placement for long-term management.
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
Enables fast, reliable, and safe suprapubic catheter placement, reducing complications and allowing for permanent catheterization, especially in morbidly obese patients and those requiring long-term urinary management, thereby improving patient comfort and reducing the need for urethral catheterization.
Implementation Method 1
The inner wall of the hollow portion is configured to frictionally engage the balloon when the balloon is in an inflated state to prevent relative movement between the balloon and the inner wall
Data Source
AI summary
A catheter capture device comprising a urethral sound and a sleeve that utilizes balloon inflation to capture the catheter. A catheter capture device comprising a urethral sound and a clamshell device. The clamshell device comprises two halves, one of which comprises two pins. One pin passes through the lateral holes in the tip of the catheter, and the other pin fits into a notch in the bottom half of the clamshell device. A catheter capture device comprising a urethral sound, a sleeve and a pin that passes through the lateral holes in the tip of the catheter. A catheter capture device comprising a urethral sound, a wire and a nodule, wherein the nodule captures the catheter by lodging in the tip of the catheter. The nodule could be a ball, hook, crimped wire or similar object. A method of capturing a catheter in an obese or non-obese patient.