Anvil Assembly Tilt Control for Powered Surgical Devices
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Solution Overview
Problem
Existing surgical devices with powered drive systems are not compatible with end effectors that require rotary motion, and existing end effectors of different sizes are not compatible with various surgical devices, necessitating a solution that accounts for size and physical attributes to ensure proper operation and extraction.
Innovation Solution
A powered surgical device with a handle assembly, adapter assembly, and anvil assembly that includes a motor and controller, allowing for controlled extraction by moving the anvil assembly distally and pivoting the anvil head while maintaining engagement with the reload, using interfacing splines and stored dimension values to determine the appropriate tilt distance based on the anvil head or reload dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the anvil assembly is moved distally during extraction, then the anvil head can be tilted to facilitate removal, but the anvil assembly may dislodge from the reload
Solution Approach 1:
The controller adjusts the distal movement distance of the anvil assembly based on stored dimension values corresponding to different reload sizes. By changing the movement parameter according to the specific reload dimensions, the system achieves both sufficient tilt for extraction and maintained engagement, resolving the contradiction between ease of operation and reliability.
2Adaptability or versatility
If powered drive systems use linear driving force, then existing end effectors can be actuated, but compatibility with rotary motion end effectors is lost
Solution Approach 1:
The powered drive system dynamically adapts its motion type (linear or rotary) based on the detected end effector type and size. The controller selects the appropriate drive mode, enabling compatibility with different end effector configurations without requiring multiple dedicated drive systems, thus improving adaptability while managing complexity.
3Adaptability or versatility
If different sized end effectors are used, then various surgical applications can be addressed, but compatibility with standardized surgical devices is reduced
Solution Approach 1:
The controller stores dimension values corresponding to different reload and anvil assembly sizes and selects appropriate operational parameters based on these dimensions. This parameter adaptation enables compatibility across different sized components without requiring complex physical interfaces, resolving the contradiction between versatility and device complexity.
4Ease of operation
If the anvil head is tilted during extraction, then manipulation is facilitated, but the extraction distance must be precisely controlled
Solution Approach 1:
The system uses stored dimension values as reference feedback to control the distal movement distance of the anvil assembly. By comparing the actual movement against the predetermined distance based on reload dimensions, the controller ensures precise tilt control while maintaining engagement, resolving the contradiction between ease of operation and manufacturing precision.
Data Source
AI summary
A surgical device includes a handle assembly having a controller and a motor. The surgical device also includes an adapter assembly having: a tubular housing having a proximal end portion configured to couple to the handle assembly and a distal end portion; and an actuation assembly configured to couple to the motor. The surgical further includes a reload configured to couple to the distal end portion of the adapter assembly; and an anvil assembly including an anvil head pivotally coupled to an anvil shaft, the anvil assembly configured to couple to the actuation assembly and the reload. The controller of the surgical device is configured to control the motor to actuate the actuation assembly to move the anvil assembly in a distal direction for a distance based on a dimension of one of the reload or the anvil head, thereby pivoting the anvil head relative to the anvil shaft while maintaining engagement of the anvil assembly to the reload.