Skin Tensiometer Spring Arm Gauge for Surgical Force Measurement
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Solution Overview
Problem
Conventional skinfold skin tension measuring apparatuses are unable to accurately determine skin tension, which is crucial during surgical procedures like facelifts to avoid excessive tightness or looseness that can lead to complications such as edema and scarring.
Innovation Solution
A skin tensiometer comprising a pair of rigid legs with pivotally connected distal ends, a gauge for measuring spacing, and a spring arm with a stop projection to indicate a predetermined force, allowing for repeatable and accurate skin tension measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional skinfold skin tension measuring apparatus is used, then the thickness of subcutaneous fat layer can be measured, but skin tension cannot be accurately determined
Solution Approach 1:
The patent replaces the conventional mechanical skinfold measuring system with a new mechanical system that incorporates a spring mechanism and gauge. The spring arm with calibrated scale allows direct measurement of skin tension force, substituting the indirect fat thickness measurement method with a direct tension measurement approach.
Solution Approach 2:
The invention changes the measurement parameter from subcutaneous fat thickness to skin tension force. By using a spring mechanism with calibrated scale, the device measures the force required to separate skin layers, providing a new parameter (tension in grams or ounces) that directly indicates skin tightness rather than indirect fat layer thickness.
2Measurement precision
If surgeon uses fingers to evaluate skin tension, then the procedure is simple, but measurement precision is insufficient to avoid complications
Solution Approach 1:
The skin tensiometer is designed as a simple, inexpensive, single-use or disposable device. The lightweight construction with basic spring mechanism and gauge keeps manufacturing costs low, allowing it to be discarded after one use to maintain sterility and prevent cross-contamination, while providing precise measurement capability that finger evaluation cannot achieve.
Solution Approach 2:
The device introduces a mechanical intermediary (spring mechanism with gauge) between the surgeon and the skin tissue. This intermediary translates the complex tactile sensation of skin tension into a quantifiable numerical reading, removing subjectivity from the evaluation process while keeping the device itself simple in structure.
3Strength
If skin is made too tight during facelift, then aesthetic outcome is improved, but edema and scarring occur
Solution Approach 1:
The skin tensiometer provides immediate quantitative feedback on skin tension levels during the surgical procedure. The gauge reading gives the surgeon real-time information about the force being applied, allowing adjustment to stay within the optimal range that achieves aesthetic improvement without exceeding the threshold that would cause edema or scarring.
Solution Approach 2:
The invention enables precise control of skin tension by measuring and displaying the force parameter. The surgeon can adjust the tension to maintain it within an optimal range (e.g., 50-150 grams), transforming the qualitative assessment into a controlled quantitative parameter that prevents harmful effects while achieving desired aesthetic outcomes.
4Object-affected harmful factors
If skin is made too loose during facelift, then complications are avoided, but aesthetic outcome is diminished
Solution Approach 1:
The device provides real-time feedback through the gauge reading, allowing the surgeon to verify that sufficient tension is being applied to achieve aesthetic improvement. The quantitative measurement eliminates uncertainty, confirming that the tension level is adequate for the desired outcome while still remaining below the threshold for complications.
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 precise measurement of skin tension, preventing excessive tightness or looseness during surgical procedures, thereby enhancing aesthetic outcomes and reducing complications like edema and scarring.
Implementation Method 1
A spring arm is connected for resilient, flexible movement relative to one of the first leg or the second leg
Data Source
AI summary
An apparatus for measuring tension of skin comprises a first rigid leg, a second rigid leg, and means for pivotally connecting proximal ends of the first leg and the second leg such that distal ends of the first leg and the second leg can be moved toward and away from one another. A gauge is carried by one of the first leg or the second leg for giving an indication of the spacing between the distal ends of the first leg and the second leg. Indicia is carried by the other of the first leg or the second leg. A spring arm is connected for resilient, flexible movement relative to one of the first leg or the second leg.