Multiphasic FUE Handpiece With Force-Feedback Rotary Control
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Solution Overview
Problem
The performance of Follicular Unit Extraction (FUE) surgery heavily depends on the operator's manual control of force application, leading to variability and inconsistency in graft extraction due to differences in skin thickness and density across the scalp.
Innovation Solution
A multiphasic FUE system with a force sensor and controller that adjusts rotary modes in real-time based on measured skin resistance, allowing for precise and adaptive extraction by varying the force and movement of the punch tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual force control by operator is used, then flexibility in handling different skin conditions is achieved, but extraction precision and consistency deteriorate due to operator variability
Solution Approach 1:
The system incorporates a force sensor that provides real-time feedback on the force being applied during extraction. The controller receives this feedback and automatically adjusts the motor's rotational speed and torque to maintain optimal extraction conditions across varying skin thickness and density, eliminating operator variability while preserving adaptability.
Solution Approach 2:
The patent replaces the manual mechanical control system with an automated electromechanical system. The motor-driven punch tool, controlled by a microprocessor-based controller with force sensor feedback, substitutes for manual operator control, thereby eliminating human variability while maintaining the ability to adapt to different skin conditions through automated force regulation.
2Manufacturing precision
If automated multiphasic control is implemented, then extraction precision is improved, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors force sensor data, determines skin characteristics, selects appropriate extraction phases, regulates motor speed and torque, and provides real-time feedback control. By consolidating these diverse functions into a single multi-functional controller, the system achieves high extraction precision without proportionally increasing overall device complexity.
Solution Approach 2:
The system performs self-regulation through the force sensor and controller combination. The controller automatically adjusts extraction parameters based on real-time force feedback without requiring external intervention or complex manual programming, thereby achieving precision control while keeping the control architecture relatively simple and self-managing.
3Adaptability or versatility
If operator expertise is required for manual force gauging, then adaptability to skin variations is achieved, but ease of operation deteriorates due to steep learning curve
Solution Approach 1:
The force sensor and controller system performs the complex task of adapting to skin variations automatically. The device monitors force feedback in real-time and self-adjusts extraction parameters without requiring the operator to have specialized knowledge or experience in gauging skin characteristics manually, thereby maintaining adaptability while dramatically improving ease of operation.
Solution Approach 2:
The automated electromechanical control system replaces the need for operator expertise in manual force gauging. The controller with force sensor feedback substitutes for the operator's skilled judgment, eliminating the learning curve while preserving the ability to adapt to different skin conditions through automated sensing and regulation.
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
Enhances extraction precision, reduces operator expertise requirements, and ensures consistent graft quality by automatically adapting to varying skin conditions, thereby improving the efficiency and consistency of hair transplantation procedures.
Implementation Method 1
a motor, a driveshaft operatively coupled to the motor and driven to rotate thereby
Data Source
AI summary
An extraction device, including a motor, a driveshaft operatively coupled to the motor and driven to rotate thereby, a punch tool directly coupled to a distal end of the driveshaft to rotate therewith, and arranged to be in physical contact with a skin layer during operation of the extraction device, a force sensor operatively coupled to the driveshaft to measure a force exerted thereupon by the skin layer, and a controller communicatively coupled to the motor and to the force sensor. The controller is configured to define multiple rotary modes and multiple multiphasic modes, each multiphasic mode including at least two rotary modes, receive a selection of a multiphasic mode, and provide, based on the selection, a control signal to the motor instructing the motor to operate in the multiphasic mode.