Arthroscopic Resection Instrument with Dynamic Suction Control
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Solution Overview
Problem
Existing mechanical resection devices during arthroscopic surgical procedures face inefficiencies in debris removal and tissue resection due to inadequate suction control, which can lead to reduced performance and increased risk of clogging.
Innovation Solution
A mechanical resection system with outflow control, comprising a controller, motor drive unit, and peristaltic pump, that modulates suction rate based on the rotational mode and activity level of the resection instrument, using sensors to adjust fluid flow in real-time to enhance debris removal and prevent clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If suction rate is increased to improve debris removal, then debris clearance efficiency is improved, but risk of tissue damage and clogging increases
Solution Approach 1:
The suction rate is made dynamic rather than fixed. The system automatically adjusts suction rate based on real-time detection of clogging conditions and resection activity, allowing the suction to be high when needed for debris removal and low when tissue is at risk, thus resolving the contradiction between debris removal efficiency and clogging risk
Solution Approach 2:
The system incorporates sensors that detect clogging conditions and resection activity, providing feedback to the control system. This feedback loop enables automatic adjustment of suction rate to maintain optimal performance while preventing tissue damage and clogging, addressing the contradiction between high debris removal and low clogging risk
2Illumination intensity
If suction rate is increased to clear debris, then visual field clarity is improved, but tissue may be pulled into cutting zone increasing safety risks
Solution Approach 1:
The suction rate is dynamically adjusted based on real-time conditions. When visual field clarity is compromised, suction is increased to clear debris. When tissue pulling risk is detected, suction is automatically reduced, thus maintaining visual field clarity while minimizing tissue damage risk
Solution Approach 2:
Sensors detect both visual field conditions and tissue position, providing feedback to the control system. The system uses this feedback to automatically modulate suction rate, clearing debris when needed while preventing excessive suction that could pull tissue into the cutting zone
3Ease of operation
If manual suction control is used to adjust fluid flow, then ease of operation is improved, but resection efficiency decreases due to inadequate debris removal
Solution Approach 1:
The system performs self-adjustment of suction rate based on sensor feedback regarding clogging conditions and resection activity. This automated self-service capability maintains ease of operation while significantly improving resection efficiency by ensuring adequate debris removal without requiring constant manual intervention
Solution Approach 2:
The control system continuously monitors resection activity and clogging conditions through sensors, using this feedback to automatically adjust suction rate. This maintains the simplicity of operation while optimizing debris removal to enhance resection efficiency, resolving the contradiction between ease of operation and resection performance
4Device complexity
If fixed suction rate is used to simplify control system, then device complexity is reduced, but performance is reduced due to inability to adapt to varying resection conditions
Solution Approach 1:
The system incorporates sensors that detect clogging conditions and resection activity, providing feedback to an automated control system. This feedback mechanism enables the system to adapt to varying resection conditions automatically, maintaining performance adaptability while keeping the control system relatively simple through rule-based automatic adjustment
Solution Approach 2:
The control system performs self-adjustment based on sensor input regarding resection conditions. This automated self-service approach enables the system to adapt to different surgical scenarios without requiring complex manual control interfaces, balancing device complexity with performance adaptability
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 system improves resection efficiency by dynamically adjusting suction rates during tissue resection, effectively clearing debris and reducing clogging risks, thereby enhancing surgical performance.
Implementation Method 1
a peristaltic pump, the peristaltic pump drawing fluid through the mechanical resection instrument at a modulated rate
Data Source
AI summary
Mechanical resection instruments with outflow control. At least some of the example embodiments are methods including: receiving an indication of a first rotational mode of a mechanical resection instrument coupled to a motor of a motor drive unit (MDU); controlling rotation of the rotating portion of the mechanical resection instrument by controlling the motor, the controlling in conformance with the indication of the first rotational mode; setting a first outflow rate through the mechanical resection instrument based on the indication of the first rotational mode; drawing fluid through the mechanical resection instrument at the first outflow rate during a surgical procedure, the drawing by way of the pump controlled by the controller; sensing a parameter indicative of resection by the mechanical resection instrument; and changing a rate at which fluid is drawn through the mechanical resection instrument, the changing relative to the first outflow rate.