Surgical Instrument Threshold Control for Tissue Adaptation
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Solution Overview
Problem
Current surgical instruments lack efficient mechanisms to modify their operation based on varying tissue types and conditions, leading to inconsistent performance and potential tissue damage.
Innovation Solution
The development of surgical instruments with interchangeable shaft assemblies and advanced control systems that utilize multiple thresholds and sensors to adjust operation parameters such as closure rates, staple cartridge detection, and cutting edge sharpness, enabling real-time adaptation to different tissue types and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If surgical instruments use fixed operation parameters, then device complexity is reduced, but adaptability to different tissue types deteriorates
Solution Approach 1:
The surgical instrument employs dynamic parameter adjustment through multiple sensors that continuously monitor tissue properties and automatically modify operation parameters such as closure rate, firing force, and stapling depth. This dynamic adaptation allows the instrument to optimize performance for different tissue types without requiring complex manual reconfiguration.
Solution Approach 2:
The instrument incorporates feedback mechanisms where sensors detect tissue characteristics and operational conditions, then feed this information back to the control system. The control system processes this feedback and adjusts operation parameters in real-time, creating a closed-loop system that enhances adaptability while maintaining manageable device complexity through automated control.
2Productivity
If surgical instruments increase operation speed, then productivity is improved, but tissue damage increases
Solution Approach 1:
The instrument dynamically adjusts operation speed based on real-time tissue feedback. Sensors monitor tissue response during surgery, and the control system modulates motor speed and actuation force accordingly. This allows high-speed operation for robust tissues while automatically reducing speed for delicate tissues, optimizing productivity while minimizing damage.
Solution Approach 2:
The system changes operational parameters such as closure rate, firing speed, and actuation force based on detected tissue properties. By varying these parameters dynamically rather than maintaining fixed high-speed operation, the instrument achieves high productivity for appropriate tissue types while preventing excessive speed-related damage to sensitive tissues.
3Productivity
If surgical instruments use high closure rates, then productivity is improved, but tissue compression damage increases
Solution Approach 1:
The instrument employs dynamic control of the closure rate through feedback from force sensors and position sensors. The control system adjusts the closure speed and force in real-time based on tissue compliance and resistance measurements, enabling high closure rates for durable tissues while automatically reducing closure force for compression-sensitive tissues.
Solution Approach 2:
The system modifies closure parameters such as closure rate, compression force, and holding time based on detected tissue characteristics. This parameter adaptation allows efficient high-rate closure for appropriate tissues while preventing compression damage to sensitive tissues through automated parameter reduction.
4Measurement precision
If surgical instruments lack real-time monitoring, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The instrument uses multi-functional sensors that simultaneously measure multiple tissue parameters such as force, position, temperature, and compliance. This universal sensing approach achieves comprehensive measurement precision without proportionally increasing device complexity, as single sensors perform multiple measurement functions.
Solution Approach 2:
The control system processes feedback from multiple sensors to achieve precise measurement and control of tissue parameters. By integrating sensor data and using feedback algorithms, the system achieves high measurement precision while managing complexity through automated data processing and parameter calculation.
Data Source
AI summary
Thresholds can be assigned for one or more parameters in connection with the operation of a surgical device. An ultimate threshold can trigger a desired action, including cessation of operations or modification of operations, if the ultimate threshold is reached, or predicted to be reached. In addition, a marginal threshold can trigger a desired action, including improving operations such as slowing operations where the value of a parameter is measured to be between the values defined by a marginal threshold and an ultimate threshold. Multiple thresholds, based on multiple parameters, can be defined, further enabling calibrated usage, such as slowing operations based on exceeding both a marginal threshold based on number of sterilization cycles and exceeding a marginal threshold based on extent to which current draw exceeds a certain value.