Internal Ascites Drainage Catheter With Bladder Anchoring
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Solution Overview
Problem
Conventional ascites drainage catheters face challenges in maintaining fixation to the human body, causing pain and complications due to repetitive procedures, and limiting patient mobility and comfort.
Innovation Solution
An internal drainage catheter with a tubular main conduit and anchoring portions that form a flow path between the peritoneal cavity and bladder, featuring elastic anchoring structures and check valves to ensure smooth ascites discharge and prevent fluid reversal, enhancing fixation and minimizing discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional catheters are inserted through the intestinal wall for external drainage, then ascites can be drained, but the catheter cannot be maintained for several days due to infection risk and patient discomfort
Solution Approach 1:
The catheter is divided into multiple functional segments: a peritoneal cavity-side anchoring portion with anchoring protrusions for secure fixation, a main conduit portion for fluid transport, and a bladder-side anchoring portion with check valves. This segmentation allows each part to perform its specific function optimally, enabling long-term reliable drainage while minimizing complications.
Solution Approach 2:
The bladder serves as an intermediary reservoir between the peritoneal cavity and the external environment. Ascites is drained into the bladder through the catheter, and then evacuated periodically. This intermediary approach eliminates the need for external catheter fixation, reducing infection risk and patient discomfort while maintaining drainage effectiveness.
2Productivity
If repetitive ascites punctures are performed to drain ascites, then symptoms can be improved, but the procedure causes pain, discomfort, and complications such as intestinal perforation and infection
Solution Approach 1:
The catheter is pre-positioned during a single minimally invasive procedure with anchoring portions secured to the bladder wall. Check valves are pre-installed to prevent backflow. This preliminary setup eliminates the need for repeated punctures, reducing pain and complications while maintaining effective ascites drainage over an extended period.
Solution Approach 2:
The catheter system is designed to maintain itself within the body without requiring repeated external interventions. The anchoring portions with elastic restoring forces automatically secure the catheter to the bladder wall, and the check valves automatically prevent backflow of bladder fluid. This self-maintaining system eliminates the need for repetitive punctures and their associated harms.
3Productivity
If a catheter is inserted externally for ascites drainage, then fluid can be drained, but the patient experiences limited mobility and significant discomfort in daily life
Solution Approach 1:
The bladder is utilized as an internal intermediary reservoir, eliminating the need for external catheter fixation. The catheter is positioned internally with anchoring portions securing it to the bladder wall, allowing patients to move freely without external constraints. Bladder fluid can be periodically evacuated through natural urination or simple catheter removal, significantly improving patient comfort and mobility.
Solution Approach 2:
The internal catheter system with anchoring portions and check valves maintains itself within the body, requiring minimal patient intervention. Patients can resume normal daily activities and mobility without the burden of external drainage equipment, as the system automatically prevents backflow and maintains positioning.
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 catheter enables effective ascites drainage with increased fixation to the body, reducing pain and complications, allowing patients to move freely and maintain daily activities.
Implementation Method 1
being wound into a ring shape by an elastic restoring force when the peritoneal cavity-side anchoring portion is separated from the inside of the laparoscope
Implementation Method 2
being provided with a check valve for selectively opening and closing the outlet
Implementation Method 3
has an elastic film structure provided to be elastically deformed according to a pressure due to the movement of the ascites discharged via the outlet
Data Source
AI summary
An internal drainage catheter for ascites drainage according to an embodiment has an improved structure so as to allow ascites in a peritoneal cavity to be discharged in urine via a bladder and ensure significant fixation force to a bladder wall based on which the peritoneal cavity and the bladder are separated from each other.