Pulsed Motor Stapling Instrument Firing Rack
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Solution Overview
Problem
Current surgical stapling instruments face challenges in ensuring precise tissue compression and staple firing mechanisms, often resulting in inconsistent staple deployment and tissue cutting, which can lead to inadequate closure or incomplete procedures.
Innovation Solution
The development of a surgical stapling instrument with an advanced staple firing system that incorporates a sled mechanism with ramped surfaces, a firing member with cams for controlled tissue gap adjustment, and a knife for simultaneous incision, along with a staple cartridge design featuring resilient retainer drivers and a longitudinal slot for precise staple ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional surgical stapling instrument is used, then the structure is simple, but the staple deployment consistency and tissue compression precision are poor
Solution Approach 1:
The firing member is designed to be movable along the longitudinal axis, transitioning between a retracted position and a forward position. This dynamic adjustment allows precise control over tissue compression and staple deployment, resolving the contradiction by enabling consistent staple formation through controlled motion rather than fixed mechanical structures
Solution Approach 2:
A sensor detects the position of the firing member and provides feedback to the controller. The controller adjusts the firing member's position based on this feedback to achieve precise tissue compression and consistent staple deployment. This closed-loop control system ensures manufacturing precision while managing system complexity through intelligent control
2Measurement precision
If a pulsed motor-driven firing rack is implemented, then the staple firing precision is improved, but the device complexity increases
Solution Approach 1:
The traditional mechanical firing mechanism is replaced with a pulsed motor-driven system. The motor provides precise positional control through electronic pulse control, enabling accurate firing position measurement and adjustment. This substitution resolves the contradiction by achieving high measurement precision through electronic control while reducing mechanical complexity
Solution Approach 2:
The motor operates in pulsed intervals rather than continuous operation, with specific pulse sequences controlling the firing member's movement to predetermined positions. This periodic action enables precise positioning while reducing overall system complexity through simplified control logic and reduced mechanical components
3Stress or pressure
If the firing member is held in a retracted position, then the tissue compression is maintained, but the staple firing time is delayed
Solution Approach 1:
The firing member is positioned at predetermined locations before the actual firing event, with the controller pre-positioning it based on detected tissue characteristics. This preliminary action allows the system to maintain tissue compression by keeping the firing member retracted until needed, then quickly advance it to the firing position, thus reducing firing delay while preserving compression benefits
Data Source
AI summary
A stapling instrument comprising a firing drive including a motor-driven reciprocatable pawl is disclosed.