Surgical Stapler Anvil Strain Sensing for Reliable Staple Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical staplers lack the ability to accurately measure tissue strain during the stapling process, leading to potential issues with malformed or open staples due to improper tissue grasping, which can result from either excessively thick tissue or inadequate clamping force.
Innovation Solution
Incorporation of an anvil strain measuring assembly within the surgical stapler, comprising a strain gauge and control assembly to monitor strain on the anvil channel, allowing for real-time evaluation of clamping forces and tissue thickness, and providing feedback on the risk of staple malformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surgical staplers are used without strain measurement, then the device complexity is low, but the reliability of staple formation is compromised due to inability to detect improper tissue grasping
Solution Approach 1:
The patent replaces mechanical strain measurement methods with electronic sensing technology. Strain gauges convert mechanical deformation of the anvil channel into electrical signals that can be processed by a control assembly, enabling precise detection of tissue grasping conditions without complex mechanical linkages.
Solution Approach 2:
The patent implements a feedback system where strain gauge measurements are continuously monitored by a control assembly that provides real-time information about tissue grasping adequacy. This feedback loop allows the system to detect improper clamping conditions and alert the operator before stapling occurs, ensuring reliable staple formation.
2Measurement precision
If strain measurement features are added to the surgical stapler, then the measurement precision of tissue strain is improved, but the device complexity increases due to additional components
Solution Approach 1:
The patent replaces complex mechanical strain measurement mechanisms with electronic strain gauges that provide high-precision measurements through electrical signal processing. This substitution achieves superior measurement precision while adding minimal mechanical complexity to the overall device.
Solution Approach 2:
The control assembly serves multiple functions: it processes strain gauge signals, determines tissue grasping adequacy, provides operator alerts, and can prevent stapling under improper conditions. This multi-functionality consolidates what could be separate complex subsystems into a single integrated unit.
3Manufacturing precision
If real-time strain monitoring is implemented, then the quality of stapling process is improved, but the use of energy increases due to additional sensors and control systems
Solution Approach 1:
The patent applies strain measurement selectively - the strain gauges continuously monitor the anvil channel, but the control assembly only processes signals when clamping forces exceed predetermined thresholds. This partial action approach maintains high stapling quality while minimizing unnecessary energy consumption during normal operation.
4Difficulty of detecting and measuring
If strain gauges are installed on the anvil channel, then the detection capability of clamping forces is improved, but the ease of manufacture decreases due to additional assembly steps
Solution Approach 1:
The patent incorporates strain gauges into the anvil channel during the manufacturing process itself, rather than as a separate post-manufacturing step. This preliminary integration ensures proper positioning and bonding of the sensors while the anvil channel material is still in a suitable state, simplifying the overall assembly process.
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
Ensures proper staple formation by preventing the firing of staples when excessive or inadequate clamping forces are detected, thereby improving the quality and reliability of the stapling process.
Implementation Method 1
Incorporation of an anvil strain measuring assembly within the surgical stapler, comprising a strain gauge and control assembly to monitor strain on the anvil channel
Data Source
AI summary
An apparatus includes a first and second elongate member that can releasably couple together to in order to cooperate to clamp and staple tissue, a latch member that can latch the first and second elongate member to clamp tissue, a firing assembly that can sever and staple clamped tissue, and a strain measuring assembly associated with the first elongate member. The strain measuring assembly being capable of measuring a strain value on the first elongate member, compare the strain value with a predetermined limit associated with successful staple formation, and generate a signal in response to the comparison.