Rotary Tissue Disruptor with Angular Sweep for Spinal Access
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Solution Overview
Problem
Current tissue disruption devices lack the ability to effectively and efficiently disrupt soft or hard tissue within the body, particularly in confined spaces like the spine, due to limitations in angular motion and blade design, which can lead to incomplete tissue removal and accidental damage to surrounding tissues.
Innovation Solution
A tissue disruption device with a rotary tissue disruptor and angular displacement mechanism that allows for a range of angular motion, supported by an elongated member and actuated by a rotary drive, enabling the disruptor to sweep through a significant angle and interact with the conduit to limit linear displacement, combined with blades of varying lengths for effective tissue disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotary tissue disruptor is inserted along a rigid conduit with limited angular motion, then the device can be safely deployed through narrow body passages, but the disruptor cannot effectively access and disrupt tissue at multiple angles within confined spaces
Solution Approach 1:
The tissue disruptor is designed with a dynamic angular displacement mechanism that allows the rotary disruptor to sweep through a range of angles (e.g., 30-45 degrees) relative to the conduit axis. This dynamic positioning capability enables the disruptor to access tissue at multiple angles while maintaining a relatively simple overall device structure that can still be deployed through narrow body passages.
2Reliability
If blades of uniform length are used on the rotary disruptor, then the device structure is simple, but tissue disruption is incomplete and surrounding tissues may be accidentally damaged
Solution Approach 1:
The rotary disruptor employs blades of varying lengths arranged in a specific pattern around the rotation axis. This non-uniform blade configuration creates different cutting zones that can selectively disrupt target tissue while sparing surrounding healthy tissues. The varied blade lengths allow for more complete and reliable tissue disruption without requiring complex additional components.
Data Source
AI summary
A tissue disruption device (10) for deployment via a rigid conduit (100) includes a rotary tissue disruptor (12) insertable along the conduit with its axis of rotation (14) parallel to the direction of conduit elongation (16). An angular displacement mechanism allows selective displacement of the rotary tissue disruptor (12) such that the axis of rotation (14) sweeps through a range of angular motion. A rotary drive is linked to the rotary tissue disruptor so as to drive the rotary tissue disruptor in rotary motion while the rotary tissue disruptor is at a range of angular positions within the range of angular motion.