Surgical Stapler Feedback System for Tissue Cut Detection
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Solution Overview
Problem
Existing circular surgical staplers lack an effective feedback mechanism to confirm when the cutting knife has completely traversed the tissue during anastomosis procedures, relying on insufficient auditory cues like a "crunching" sound from a plastic washer.
Innovation Solution
Incorporation of a feedback system with sensors and indicators, such as a knife board with embedded or affixed wires that are severed by the cutting knife, triggering a signal to an indicator, providing visual, auditory, or tactile feedback to the surgeon when the knife has cut through the tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic washer or knife board is used to provide auditory feedback, then the surgeon receives some indication of knife traversal, but the feedback is insufficient and unreliable
Solution Approach 1:
The patent implements a feedback system using sensors (optical, magnetic, or electrical) that detect when the knife has traversed the tissue and provide immediate visual, auditory, or tactile feedback to the surgeon through LEDs, sounds, or vibrations. This resolves the unreliability of auditory-only feedback by providing multiple reliable feedback modalities that clearly indicate complete tissue traversal.
Solution Approach 2:
The patent replaces the mechanical auditory feedback system (plastic washer crunching sound) with electronic sensing and feedback systems. Optical sensors detect knife position, magnetic sensors detect knife proximity, or electrical circuits complete/break to trigger feedback signals. This substitution provides more reliable and controllable feedback than the crude mechanical approach.
2Difficulty of detecting and measuring
If no feedback mechanism is provided, then the device remains simple, but the surgeon cannot determine when the knife has completely cut through the tissue
Solution Approach 1:
The patent implements feedback systems that actively communicate knife traversal status to the surgeon through multiple sensory channels (visual LEDs, auditory beeps, tactile vibrations). This resolves the detection difficulty by providing clear, unambiguous signals that the knife has completely cut through the tissue, eliminating surgeon uncertainty.
Solution Approach 2:
The patent introduces intermediary components (sensors, indicators, feedback circuits) that mediate between the knife's physical action and the surgeon's perception. These intermediaries translate the mechanical cutting process into detectable signals, making the invisible cutting process visible and measurable without significantly complicating the core stapling function.
3Productivity
If multiple rows of staples are emplaced and tissue is cut simultaneously, then the anastomosis procedure is simplified and time is decreased, but the surgeon loses ability to independently verify cut completion
Solution Approach 1:
The patent provides real-time feedback during the simultaneous stapling and cutting process, allowing the surgeon to verify cut completion without interrupting the efficient simultaneous operation. The feedback system maintains procedural efficiency while recovering the lost information about cut status through optical, magnetic, or electrical sensing mechanisms that trigger visual, auditory, or tactile signals.
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
Enhances the surgeon's confidence by providing clear and reliable feedback that the knife has completed the cut, reducing uncertainty and improving procedural efficiency during anastomosis.
Implementation Method 1
A sensor, such as an optical, magnetic or electrical sensor
Implementation Method 2
A sensor, such as an optical, magnetic or electrical sensor
Implementation Method 3
providing visual, auditory, or tactile feedback to the surgeon
Data Source
AI summary
Circular stapling instruments for cutting and applying one or more surgical staples to tissue are disclosed. The instruments include various forms of feedback systems designed to provide at least one mode of feedback to the surgeon when the knife has cut through tissue clamped between a staple cartridge and an anvil portion.