Luer Morselizer Blades for Atraumatic Fat Particle Resizing
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Solution Overview
Problem
Current luer fittings used in fat harvesting for cosmetic and plastic surgery are inadequate for atraumatic resizing of fat particles to ensure the survival of the beneficial stromal vascular fraction (SVF) during injection, as they either damage particles or fail to deliver them effectively in the required size range.
Innovation Solution
A morselizer device with a hollow cylindrical structure featuring axially and radially hollow luer fittings and transverse blades across its center section, allowing for the resizing of fat particles by transferring them through an axial liquid pathway, ensuring minimal damage and maintaining the beneficial SVF components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional luer fittings are used for fat harvesting, then the harvesting process is simple, but the fat particles are damaged and SVF is lost
Solution Approach 1:
The blades are nested within the hollow cylindrical structure, with the cutting edges positioned inside the luer fitting pathway. The fat particles travel through the nested blades during transfer, enabling resizing without requiring external cutting mechanisms or complex additional components.
Solution Approach 2:
The hollow cylindrical structure with luer fittings serves as an intermediary device between the fat harvesting cannula and injection syringe. This intermediary morselizer contains the blades that resize particles while maintaining a simple two-component luer connection system that is easy to operate.
2Quantity of substance
If smaller cannulas are used to harvest fat, then smaller particles are obtained, but the beneficial SVF fraction is lost
Solution Approach 1:
The blades are positioned to create variable gap widths that dynamically control particle sizing during the transfer process. The hollow cylindrical structure allows particles to be resized through the blades while maintaining flexibility in adjusting the cutting geometry to preserve SVF components.
Solution Approach 2:
The morselizer changes the physical state and size parameters of fat particles by forcing them through the blade gaps during liquid transfer. This parameter transformation enables particles to be resized from larger harvested dimensions to injection-appropriate sizes while retaining SVF integrity.
3Reliability
If friction-based luer slip fittings are used, then attachment is quick, but connection security is reduced
Solution Approach 1:
The luer fitting is segmented into distinct male and female components with precise tapered geometries. The male luer fitting inserts into the female luer fitting, creating a secure mechanical interlock that prevents accidental separation while maintaining relatively quick attachment through the standardized interface.
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 atraumatic resizing of fat particles to a desired size without loss of the stromal vascular fraction, facilitating effective injection by maintaining the integrity of regenerative cells and ensuring proper tissue integration.
Implementation Method 1
one or more blades extending transversally across the inner diameter of the center section wherein (i) each blade is comprised of a plurality of ends... and (ii) at least two ends comprise cutting ends
Data Source
AI summary
A morselizer comprising (a) a hollow cylindrical structure with an inner wall and an outer wall and comprising a first end section, a second end section, and a center section extending axially between the first end section and the second end section providing a substantially axial liquid pathway therein; (b) wherein each end section comprises a axially and radially hollow luer fitting that is attachable to a structure with a complementarily sized luer fitting; and (c) one or more blades extending transversally across the inner diameter of the center section wherein (i) each blade is comprised of a plurality of ends, including a posterior end secured to at least the center wall section inner wall at a center section inner wall first position and an anterior end proximal a center section inner wall second position opposite the center section inner wall first position, with a gap positioned between the blade anterior end and the center section inner wall second position, and (ii) at least two ends comprise cutting ends.