Closed-Loop Handle Sensing for Continuous Catheter Control
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Solution Overview
Problem
Existing control systems for surgical tools like catheters and guide wires lack precise, continuous, and natural control mechanisms, leading to potential surgical complications due to discrepancies between the felt sensation during manipulation and actual tool handling, and limitations in one-way displacement.
Innovation Solution
A sensing device with a closed-curve shaped handle and rotating bodies that mimic the motion of actual surgical tools, allowing continuous one-directional manipulation and incorporating sensors to transmit torque and rotational movements for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a linear structure sensing device is used, then the device structure is simple, but the displacement manipulation is limited in one direction and requires reciprocating movement
Solution Approach 1:
The sensing device employs a closed curve-shaped operating part instead of a linear structure. This curved geometry enables continuous rotational movement without the need for reciprocating motion, allowing the operator to manipulate the surgical tool in one direction continuously. The curvature transforms the movement pattern from linear back-and-forth to circular, eliminating displacement limitations.
2Reliability
If buttons or joysticks are used for operation, then the device structure is simple, but there is a large gap between the sensation felt during manipulation and actual tool handling
Solution Approach 1:
The sensing device incorporates a torque sensor that detects the rotational force applied by the operator to the operating part. This torque information is transmitted to the surgical tool, creating a feedback loop where the operator's input directly controls the tool's movement. This feedback mechanism ensures that the sensation felt during manipulation accurately reflects the actual tool handling, improving surgical precision and safety.
3Productivity
If reciprocating movement is required to return the device to original position, then the device structure is simple, but the manipulation process is unnatural and time-consuming
Solution Approach 1:
The closed curve-shaped operating part enables continuous rotational movement, eliminating the need to return the device to its original position after each manipulation. The operator can continuously rotate the operating part in one direction, and the surgical tool will continuously advance or retract without interruption. This continuous action removes the time loss associated with reciprocating movement and makes the manipulation process more natural and efficient.
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
Enables precise, continuous, and fatigue-reduced remote control of surgical tools by mimicking natural tool handling, enhancing surgical precision and safety.
Implementation Method 1
a first sensor configured to sense information on a rotational movement of the first rotating body
Implementation Method 2
a second sensor configured to sense information about a rotational movement of the second rotating body
Implementation Method 3
capable of orbital movement along an extension direction of the closed curve at a predetermined location on the closed curve
Implementation Method 4
a second handle formed to be rotatable at a fixed position; a second rotating body configured to rotate around a predetermined second rotation axis in conjunction with a rotational movement of the second handle
Data Source
AI summary
A sensing device includes a housing including a first side wall member arranged in an up-down direction with respect to a bottom surface; a first handle formed in a closed curve shape, at least a portion of which is exposed to an outside of the housing and placed on a predetermined first surface, and coupled to one side of the first side wall member so as to be capable of orbital movement along an extension direction of the closed curve at a predetermined location on the closed curve; a first rotating body rotating around a predetermined first rotation axis in conjunction with the orbital movement of the first handle; a support member coupled to the housing, and supporting the first handle such that the first handle maintains a fixed position at the predetermined location; and a first sensor sensing information on a rotational movement of the first rotating body.