Multi-part Hair Follicle Harvesting Tool Minimizing Tissue Compression
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Solution Overview
Problem
Current hair transplantation methods often result in follicular unit transection and deformation due to the use of sharp tools, leading to reduced yield and increased time, as they fail to minimize tissue compression and preserve the integrity of the follicular unit during harvesting.
Innovation Solution
A method utilizing a multi-part tool assembly with coaxially disposed elongated bodies, where a sharp first body initiates a path and a duller second body follows, advancing and retracting in a pulsed manner to encapsulate the follicular unit, while minimizing tissue compression and using a pulsed vacuum to assist in dissection and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a sharp hollow needle punch is used to cut and harvest follicular units, then the harvesting process can be completed efficiently, but the follicular units are subjected to tissue compression and deformation that increases transection rate and reduces yield
Solution Approach 1:
The harvesting tool is segmented into two distinct components: a sharp outer punch for cutting and a dull inner punch for dissection. This segmentation allows each component to perform its specific function optimally - the outer punch efficiently cuts through tissue while the inner punch gently dissects the follicular unit without compression, thereby maintaining integrity while preserving harvesting efficiency.
Solution Approach 2:
The dull inner punch acts as an intermediary tool between the sharp outer punch and the follicular unit. It mediates the harvesting process by first being advanced through the path created by the outer punch, then gently dissecting the follicular unit without direct compression, thus protecting the follicular unit from damage while enabling efficient harvesting.
2Loss of time
If continuous advancement of the harvesting tool is used, then the process is faster, but tissue compression increases causing follicular unit damage
Solution Approach 1:
The inner punch advancement is performed in periodic pulsing motions rather than continuous advancement. The pulse controller advances the inner punch in incremental steps with retraction between pulses, allowing tissue to relax and reducing cumulative compression on the follicular unit, while still achieving complete dissection within a reasonable time frame.
Solution Approach 2:
The system transitions from static continuous advancement to dynamic pulsed advancement. The pulse controller enables the inner punch to move forward in controlled increments with periodic retraction, creating a dynamic harvesting process that adapts to tissue characteristics and minimizes compression damage while maintaining efficiency.
3Device complexity
If a single elongated body tool is used, then the device structure is simpler, but it cannot effectively minimize tissue compression during follicular unit dissection
Solution Approach 1:
The tool is divided into two functional segments - an outer punch and an inner punch - each with distinct properties (sharp vs. dull). This segmentation enables the inner punch to dissect the follicular unit without compression while the outer punch provides structural support and creates the initial path, effectively minimizing tissue compression despite increased structural complexity.
Solution Approach 2:
The inner punch is nested within the outer punch, with the inner punch having a smaller diameter and being received by the outer punch. This nested configuration allows the dull inner punch to perform gentle dissection while the sharper outer punch provides structural integrity and cutting function, minimizing compression on the follicular unit.
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
This approach reduces the rate of follicular unit transection, minimizes damage, and improves the quality of harvested specimens by maintaining the integrity of the follicular unit, enhancing the efficiency and success rate of hair transplantation.
Implementation Method 1
pulsed vacuum to assist in dissection and removal
Data Source
AI summary
Systems and methods are provided for harvesting hair grafts from a body surface utilizing a removal tool comprising first and second elongated bodies. The described systems and methods serve to eliminate and/or at least minimize unnecessary compression of adjacent tissue during the removal process, thereby minimizing damage to the follicular unit being removed, reducing the opportunities for the follicular unit to intersect the path of the harvesting tool, and/or improving the quality of the removed specimen, preferably preserving its integrity.