Surgical Device Cab-Forward Handle Dual Dial Controller
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Solution Overview
Problem
Conventional surgical devices for clamping, cutting, and stapling lack maneuverability, requiring improved positioning of tissue between gripping elements during surgical procedures.
Innovation Solution
A powered rotating and articulating surgical device with a cab-forward configured handle, featuring a dual dial controller that allows for precise rotation and pivoting of the end effector via interconnected drive shafts and Hall-Effect switches, providing tactile and audible feedback for enhanced control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional pistol grip-styled surgical device is used, then the device structure is simple, but the maneuverability is poor and tissue positioning is difficult
Solution Approach 1:
The end effector is designed with dynamic movement capabilities, allowing it to rotate about the shaft longitudinal axis and pivot relative to the shaft longitudinal axis. This enables the end effector to assume multiple orientations and positions, significantly improving maneuverability for tissue access and positioning while maintaining a relatively simple overall device structure.
Solution Approach 2:
The end effector incorporates two independent rotational degrees of freedom: rotation about the shaft longitudinal axis and pivoting relative to the shaft longitudinal axis. By adding these dimensional movements, the device achieves superior maneuverability without substantially increasing structural complexity, as the movements are achieved through integrated drive mechanisms rather than additional mechanical linkages.
2Measurement precision
If the end effector can rotate and pivot, then tissue positioning precision is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical linkage systems with motorized drive mechanisms. First and second drive shafts extend through the shaft portion and are operatively connected to the end effector, with rotation controlled by a controller. This substitution of mechanical systems with controlled drive shafts achieves precise positioning while managing device complexity through integrated control.
Solution Approach 2:
The controller receives input from the operator and controls the drive shafts to achieve desired end effector positioning. The controller coordinates the rotation and pivoting movements to achieve precise tissue positioning, managing the complexity through intelligent control rather than purely mechanical means.
3Measurement precision
If a dual rotatable controller is added, then control precision is improved, but the ease of operation decreases
Solution Approach 1:
The controller integrates multiple functions into a single device: it controls both the first drive shaft for rotation and the second drive shaft for pivoting. The controller accepts operator input and coordinates both rotational movements, achieving precise control without requiring separate control mechanisms, thereby maintaining ease of operation while improving control precision.
Solution Approach 2:
The controller merges the control of two independent drive shafts into a single integrated unit. By combining the control functions for rotation and pivoting in one controller, the device achieves precise control over the end effector's orientation while simplifying the operator interface, as both controls are accessible from a single location on the handle.
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
The device enhances maneuverability and ergonomics, allowing for precise tissue positioning and efficient surgical procedures with improved comfort and control for the operator.
Implementation Method 1
The controller includes a first Hall-Effect switch associated with the first rotatable member for effectuating the rotation of the first drive shaft; and a second Hall-Effect switch associated with the second rotatable member for effectuating the rotation of the second drive shaft
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A surgical device includes a shaft portion coupled to a handle, the handle defining a longitudinal axis. The surgical device also includes a first driver configured to actuate a rotational movement via a first drive shaft and a second driver configured to actuate an articulation movement via a second drive shaft. The surgical device also includes a controller having a first dial and a second dial, the first dial actuated by the first driver and the second dial actuated by the second driver, the second dial positioned within the first dial.