Marshall, Brandon
(2015)
Evaluation of an Electronic Pressure Sensor for Tibio-Femoral Contact Pressure Measurement.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
The purpose of this study was to evaluate K-Scan electronic pressure sensor model K-4000 (K-Scan; Tekscan, Inc., Boston, MA, USA) for use in the human knee joint to assess the effect that anatomic double-bundle ACL reconstruction has on tibio-femoral contact pressure. The sensor was used to measure static pressure when 1000N of axial loading was applied to the knee joint using a materials testing machine. This study also considered the calibration of the sensor. Three methods of calibration were investigated: pressurized bladder, materials testing machine, and polyurethane rollers. Calibration data from the materials testing machine was used in this study because it was the only method able to calibrate the sensor for the widest pressure range.
Twelve fresh, frozen cadaveric human knees were used for this study. Double-bundle ACL reconstruction was performed arthroscopically using hamstring grafts. Three different graft fixation tensions were used: i) AM/PL: 30N/10N, ii) AM/PL: 10N/30N, iii) AM/PL: 40N/40N. Each knee was tested with 1000N of axial loading 0, 15, 30, and 45 degrees of flexion at the intact state and each of the reconstructions, and pressure readings were taken with the sensor for each test. The results of this study found that double-bundle ACL reconstruction did not significantly change the peak contact pressure, location of peak pressure, and location of center of pressure of the intact knee during 1000N of axial loading. This study also found that there was no significant change in peak contact pressure, location of peak pressure, and location of center of pressure during ACL graft fixation (without loading).
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
28 January 2015 |
| Date Type: |
Publication |
| Defense Date: |
12 November 2014 |
| Approval Date: |
28 January 2015 |
| Submission Date: |
2 December 2014 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
183 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering |
| Degree: |
MS - Master of Science |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
joint contact pressure; ACL reconstruction; pressure sensor |
| Date Deposited: |
28 Jan 2015 16:21 |
| Last Modified: |
15 Nov 2016 14:25 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/23735 |
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