Surgical Coupling Device Fluid Feed Element
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Solution Overview
Problem
In rhinoplasty procedures, the irrigation of the operating field with physiological saline solution is not precise and sufficient due to the placement of the fluid outlet being obstructed by the coupling bushing, especially when using long tools like saw blades, which hinders the effectiveness of motorized surgical instruments.
Innovation Solution
A coupling device with a fluid feed element that channels the saline solution through the tool shank, allowing it to emerge close to the active area, combined with a spring-loaded ball lock system for secure axial and rotational locking, ensuring precise and sufficient irrigation while maintaining tool accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the fluid outlet is placed at the end of the handpiece body, then the coupling bushing can accommodate the tool, but the irrigation precision and quantity are insufficient for long tools
Solution Approach 1:
The patent applies nesting by placing the fluid feed element inside the tool shank, with the fluid channel nested within the tool structure itself. This allows the fluid outlet to reach the active area of the tool while maintaining a compact overall design, resolving the contradiction between irrigation precision and device complexity
Solution Approach 2:
The patent transitions from external fluid delivery (at the handpiece end) to internal fluid delivery (through the tool shank). This dimensional change allows the fluid outlet to be positioned at the tool's active area, significantly improving irrigation precision without proportionally increasing complexity
2Measurement precision
If the fluid outlet cannot extend beyond the coupling point, then the coupling structure remains simple, but the operating field cannot be irrigated precisely
Solution Approach 1:
The fluid feed element is nested within the tool shank structure, allowing the fluid delivery path to extend through the tool length without increasing external dimensions. This resolves the contradiction by achieving precise irrigation at the tool tip while maintaining a compact overall length
Solution Approach 2:
The tool shank acts as an intermediary structure that carries the fluid feed element from the coupling point to the active area. This mediator enables precise fluid delivery to the operating field without requiring the fluid outlet to extend beyond the coupling point externally
3Productivity
If a long tool like a saw blade is used, then the cutting capability is improved, but the irrigation effectiveness decreases due to distance from the fluid outlet
Solution Approach 1:
By nesting the fluid feed element within the tool shank, the system can accommodate long tools like saw blades while maintaining effective irrigation at the active area. The fluid channel extends through the tool length, ensuring irrigation effectiveness is not compromised by tool length
Solution Approach 2:
The patent changes the fluid delivery approach from external (at handpiece end) to internal (through tool shank), enabling long tools to be used effectively with proper irrigation. This dimensional change allows the fluid to reach the active area regardless of tool length, maintaining both cutting capability and irrigation effectiveness
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 solution provides precise and sufficient irrigation to the operating field, enhancing the surgical performance by bringing the fluid closer to the tool's active area, reducing tool handling complexity, and preventing injuries with its compact and smooth design.
Implementation Method 1
a spring-loaded ball lock system for secure axial and rotational locking
Data Source
AI summary
Coupling device between a drive shaft of a surgical instrument and a tool, characterized in that the coupling device includes a fluid feed element fed from outside the coupling device and communicating with a channel arranged in the tool and which emerges at a location along the length of the tool.