Retractable Stylet Declogging Mechanism for Medical Debriders
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Solution Overview
Problem
Current debriders face difficulties in efficiently clearing tissue clogs from the evacuation channel during medical procedures, as existing methods like positive air pressure may not provide adequate suction for quick and complete clearance.
Innovation Solution
A retractable stylet mechanism is integrated into a medical device, allowing physical force to be applied through a stylet that extends and retracts via an auxiliary passage to clear tissue clogs within the working lumen without requiring air pressure, enabling effective declogging while maintaining the device inside the patient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If positive air pressure is used to clear tissue clogs, then suction is provided to remove tissue bits, but adequate suction is difficult to provide to fully clear the clog quickly
Solution Approach 1:
The stylet is extracted as a separate, removable component from the debrider system. It can be independently inserted through the auxiliary lumen portal to physically break up and remove tissue clogs from the working lumen, separating the declogging function from the standard suction function. This allows dedicated mechanical intervention for clog removal while maintaining the suction system's primary cutting and evacuation role.
Solution Approach 2:
The stylet acts as an intermediary mechanical element between the operator and the tissue clog. By transmitting mechanical force through the stylet, the operator can indirectly break up and clear clogs that cannot be removed by suction alone, while the stylet itself is removed after use, leaving no permanent obstruction in the working lumen.
2Ease of operation
If a stylet is extended into the working lumen via an auxiliary lumen portal, then physical force can be applied to remove tissue clogs, but the device complexity increases
Solution Approach 1:
The auxiliary lumen portal, initially designed for irrigation or other auxiliary functions, is repurposed to also serve as the access route for the stylet. This allows the same structural opening to fulfill multiple roles: fluid delivery during normal operation and stylet insertion for clog removal, thereby adding declogging capability without requiring a separate dedicated access point or major structural modifications.
Solution Approach 2:
The stylet is designed to nest within the existing debrider structure when not in use, specifically within the hub chamber or along the longitudinal axis of the tubular body. When needed, it can be extended through the auxiliary lumen portal. This nesting approach allows the declogging function to be integrated into the existing device footprint without significantly increasing overall device complexity or requiring separate storage mechanisms.
Data Source
AI summary
A debrider or other medical device can include an extendable and retractable stylet to ream or unclog a working lumen, a distal portal, or the like. The device can include an elongate tubular body with a proximal and a distal portion. A working lumen can extend from a proximal working lumen portal at the proximal portion of the tubular body to a distal working lumen portal at the distal portion of the tubular body. The device can also include an auxiliary passage, interconnected to the working lumen of the tubular body at an auxiliary lumen portal located between the proximal working lumen portal and the distal working lumen portal. A spoolable or otherwise extendable and retractable stylet can include at least a portion of the stylet being extendable into the working lumen and toward the distal working lumen portal via the auxiliary lumen portal, and the stylet being retractable from the working lumen via the auxiliary lumen portal.