Flexible Probe Advancement via Liquid Column Momentum Transfer
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Solution Overview
Problem
Existing methods face challenges in effectively advancing probes through convoluted and hard-to-reach areas, such as intestinal and vascular tracts, due to inadequate control over probe advancement.
Innovation Solution
An elongate flexible tube with a liquid column and a drive mechanism that imparts a specific speed profile to the liquid column, promoting forward momentum and advancement of the probe by minimizing pressure loss and enhancing resistance to reverse movement, while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a probe is manually advanced through a convoluted tract, then the operator can control the probe position, but the probe cannot effectively traverse long and convoluted paths without assistance
Solution Approach 1:
The system transitions from static manual control to dynamic automated advancement using a peristaltic pump that rhythmically contracts and expands to propel the probe forward through the tract, enabling the probe to traverse convoluted paths independently
Solution Approach 2:
The probe becomes self-advancing through the automated peristaltic mechanism that propels it through the tract without requiring continuous manual manipulation, allowing the system to serve itself in navigating complex anatomical paths
2Force
If a rigid drive mechanism is used to advance the probe, then forward momentum is strong, but the mechanism cannot navigate convoluted and tight spaces
Solution Approach 1:
The drive mechanism uses a flexible tube that can bend and conform to the convoluted geometry of the tract while still transmitting the peristaltic pumping action to propel the probe forward, combining flexibility with force transmission
Solution Approach 2:
The system employs dynamic peristaltic contraction and expansion along the flexible tube to generate progressive wave motion that propels the probe through tight and convoluted spaces while maintaining adaptability to the tract geometry
3Productivity
If the liquid column is moved rapidly to advance the probe quickly, then productivity increases, but pressure loss increases and control becomes difficult
Solution Approach 1:
The peristaltic pump operates in periodic cycles of contraction and expansion, creating rhythmic pressure waves that advance the probe at controlled speeds while minimizing energy loss through gradual progressive motion rather than sudden rapid movement
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 solution enables efficient and controlled advancement of probes within tracts, minimizing pressure loss and ensuring effective movement, even in complex and inaccessible areas, enhancing exploration capabilities.
Implementation Method 1
the drive mechanism is configured to cause movement of the liquid column within the tube to impart forward momentum to the tube and thereby promote advancement of at least the distal end of the tube within the tract
Implementation Method 2
A liquid of the liquid column may have a density of about the same as or greater than the density of water, so that the liquid compresses minimally when the liquid column is acted upon by the drive mechanism
Implementation Method 3
The tube may have periodic perturbations formed on an external surface of the tube along at least part of the distal end. An external surface of the tube may be contoured to enhance resistance to movement of the tube in a reverse direction
Data Source
AI summary
Some embodiments relate to an apparatus comprising an elongate flexible tube sized to be received within a tract and having a proximal end and a distal end; a drive mechanism coupled to the proximal end of the tube; and a liquid column extending from the proximal end to the distal end; wherein the drive mechanism is configured to cause movement of the liquid column within the tube to impart forward momentum to the tube and thereby promote advancement of at least the distal end of the tube within the tract when at least the distal end is received within a part of the tract.