Drainage Catheter With Separate Suture Lumen for Clear Fluid Flow
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Solution Overview
Problem
Existing drainage catheters face challenges with fluid flow interference and precipitation buildup due to the presence of a suture within the drainage lumen, which can inhibit the flow of fluids and solid or semi-solid particles, and may prevent the use of straightening devices like stylets.
Innovation Solution
The drainage catheter incorporates a dedicated suture lumen separate from the drainage lumen, allowing the suture to deflect the catheter tip into an anchor configuration while maintaining efficient fluid flow and enabling the use of stylets for insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suture is placed within the drainage lumen to deflect the catheter tip into an anchor configuration, then the catheter can be securely anchored within the body, but the suture interferes with fluid flow and may cause precipitation buildup
Solution Approach 1:
The catheter is divided into separate functional lumens: a drainage lumen for fluid flow and a suture lumen for suture passage. This segmentation allows the suture to perform its anchoring function without interfering with fluid drainage, as each lumen is dedicated to its specific purpose.
Solution Approach 2:
The suture is extracted from the drainage lumen and placed into a separate suture lumen. This extraction removes the harmful interference the suture causes to fluid flow while preserving its beneficial anchoring function, as the suture now occupies its own dedicated space within the catheter wall.
2Reliability
If a suture is placed within the drainage lumen to enable anchor configuration, then the catheter can be securely anchored, but the suture prevents the use of straightening devices like stylets
Solution Approach 1:
The catheter structure is segmented into separate lumens for different functions. The suture lumen is specifically designed to allow stylet passage, while the drainage lumen remains clear for fluid flow. This segmentation enables both stylet insertion and suture anchoring to occur simultaneously without interference.
Solution Approach 2:
The suture is taken out of the drainage lumen and placed in a separate suture lumen, which is specifically designed to accommodate both the suture and stylet. This extraction resolves the conflict between suture anchoring and stylet insertion by providing a dedicated pathway for the stylet that does not interfere with the suture's anchoring function.
3Device complexity
If a single lumen is used for both drainage and suture passage, then the device structure is simpler, but fluid flow is inhibited and precipitation buildup occurs
Solution Approach 1:
The single lumen is segmented into separate drainage and suture lumens within the catheter wall. This segmentation prevents precipitation buildup by eliminating the interference between suture and fluid flow, while the overall device structure remains relatively simple through integrated wall design.
Solution Approach 2:
The suture pathway is moved from the central drainage space to the catheter wall dimension, creating a separate suture lumen within the wall structure. This dimensional reorganization allows both drainage and suture functions to coexist without interference, maintaining simple device architecture while eliminating harmful interactions.
Data Source
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AI summary
A drainage catheter configured for draining bodily fluid from a patient is disclosed. The drainage catheter may comprise a catheter tube with a drainage lumen and a suture lumen. A suture of the drainage catheter may be disposed within the suture lumen. The suture may be coupled to a distal end of the catheter tube and extend proximally through a hub disposed at the proximal end of the catheter tube.