Endoscope Interstitial Lumen for Compact Irrigation
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Solution Overview
Problem
Existing endoscopes, particularly ureteroscopes, face challenges in reducing their size while maintaining functionality, especially in accommodating both irrigation and suction functions within a small diameter, which complicates the integration of camera and light sources at the distal end.
Innovation Solution
The introduction of an interstitial lumen within the insertion cord that allows irrigation fluid to flow through the internal space alongside other components, eliminating the need for a dedicated irrigation channel, and utilizing an outer tubular sheath with fluid openings that open under pressure to prevent back reflux, facilitating a smaller distal end cross-section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dedicated irrigation channel is provided in the insertion cord, then irrigation function is ensured, but the diameter of the insertion cord increases
Solution Approach 1:
The patent merges the irrigation channel with the existing working channel structure. The working channel is configured to receive both the laser fiber and irrigation fluid, eliminating the need for a separate dedicated irrigation channel. This integration allows the insertion cord to maintain its small diameter while still providing effective irrigation function through the same channel used for laser delivery and stone fragmentation.
2Adaptability or versatility
If multiple channels are integrated into a small diameter insertion cord, then functionality is maintained, but structural complexity increases
Solution Approach 1:
The working channel is designed as a multi-functional element that simultaneously serves as the pathway for laser fiber insertion, irrigation fluid delivery, and stone fragment removal. This universal channel design allows the insertion cord to perform multiple functions (irrigation, laser delivery, suction) through a single structural element, maintaining versatility while avoiding the complexity of multiple separate channels.
3Object-affected harmful factors
If the distal end cross-section is reduced, then trauma to the patient is reduced, but space for camera and light sources is limited
Solution Approach 1:
The patent employs a nested configuration where the laser fiber is positioned within the working channel, and the irrigation fluid flows through the same channel space. This nesting arrangement allows multiple functional elements to occupy the same spatial volume, enabling the distal end cross-section to be minimized for reduced patient trauma while still accommodating all necessary components including camera and light sources.
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
This design enables a more compact endoscope with improved visualization capabilities by allowing irrigation and suction functions within a smaller diameter, reducing trauma to the patient and enhancing procedural efficiency.
Implementation Method 1
an outer tubular sheath with fluid openings that open under pressure to prevent back reflux
Data Source
AI summary
An endoscope (1) includes a handle (2) including a handle housing (2a), an irrigation inlet port (46) adapted to receive irrigation fluid, and an irrigation channel (42); and an insertion cord (10) extending distally from the handle. The insertion cord includes an insertion tube (11); a bending section (12) extending from the insertion tube; a distal tip (13) extending from the bending section and including a tip housing; a camera at least partially enclosed in the tip housing; interstitial space (26) within the insertion tube in fluid communication with the irrigation channel; and at least one interstitial flow opening (64-67) in fluid communication with the interstitial space and adapted to discharge the irrigation fluid.