Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study
# Background Patellofemoral pain syndrome (PFPS) is one of the most common musculoskeletal complaints seen in outpatient settings. It has been suggested that hip adduction creates loads on the iliotibial band and causes lateral displacement of the patella (patellar tilt), which can lead to uneven p...
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| Format: | Article |
| Language: | English |
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North American Sports Medicine Institute
2022-10-01
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| Series: | International Journal of Sports Physical Therapy |
| Online Access: | https://doi.org/10.26603/001c.38172 |
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| _version_ | 1825197013481816064 |
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| author | Lok Yin Ada Kwan Alban Killingback Philip J Adds |
| author_facet | Lok Yin Ada Kwan Alban Killingback Philip J Adds |
| author_sort | Lok Yin Ada Kwan |
| collection | DOAJ |
| description | # Background
Patellofemoral pain syndrome (PFPS) is one of the most common musculoskeletal complaints seen in outpatient settings. It has been suggested that hip adduction creates loads on the iliotibial band and causes lateral displacement of the patella (patellar tilt), which can lead to uneven patellofemoral joint loading, and hence, cause patellofemoral pain. In previous studies in the literature, ultrasound has been used to measure lateral patellar displacement. However, the method lacks validity data.
# Purpose/Hypothesis
The aim of this study was to validate the use of ultrasound to measure lateral displacement of the patella, by comparing the position of the patella as measured first by ultrasound, and then by direct measurement.
# Study Design
Descriptive Laboratory Study.
# Methods
Nine soft-fixed cadavers were used in this study. The cadavers had been donated for anatomical examination and research under the Human Tissue Act (2004). The distance between the lateral femoral condyle and the lateral edge of the patella were measured by B-mode real-time ultrasound, and then by direct measurement, in two positions, neutral and at 20° hip adduction.
# Results
The mean difference in the patella-to-lateral femoral condyle distance in the neutral position and at 20° adduction was 0.27 cm (ultrasound), and 0.34 cm (direct measurement), respectively. There were no significant differences between the measurements obtained by US and by direct measurement (Pearson correlation= 0.97, p=0.83).
# Conclusion
Ultrasound is a valid and reliable method for measuring patellar position relative to the femoral condyle, and the validity data reported here suggest that it can be used with confidence in clinic to assess lateral patellar displacement.
# Level of Evidence
3 |
| format | Article |
| id | doaj-art-6216a971d71b470d857ef4d41468febf |
| institution | Kabale University |
| issn | 2159-2896 |
| language | English |
| publishDate | 2022-10-01 |
| publisher | North American Sports Medicine Institute |
| record_format | Article |
| series | International Journal of Sports Physical Therapy |
| spelling | doaj-art-6216a971d71b470d857ef4d41468febf2025-02-11T20:28:12ZengNorth American Sports Medicine InstituteInternational Journal of Sports Physical Therapy2159-28962022-10-01176Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation StudyLok Yin Ada KwanAlban KillingbackPhilip J Adds# Background Patellofemoral pain syndrome (PFPS) is one of the most common musculoskeletal complaints seen in outpatient settings. It has been suggested that hip adduction creates loads on the iliotibial band and causes lateral displacement of the patella (patellar tilt), which can lead to uneven patellofemoral joint loading, and hence, cause patellofemoral pain. In previous studies in the literature, ultrasound has been used to measure lateral patellar displacement. However, the method lacks validity data. # Purpose/Hypothesis The aim of this study was to validate the use of ultrasound to measure lateral displacement of the patella, by comparing the position of the patella as measured first by ultrasound, and then by direct measurement. # Study Design Descriptive Laboratory Study. # Methods Nine soft-fixed cadavers were used in this study. The cadavers had been donated for anatomical examination and research under the Human Tissue Act (2004). The distance between the lateral femoral condyle and the lateral edge of the patella were measured by B-mode real-time ultrasound, and then by direct measurement, in two positions, neutral and at 20° hip adduction. # Results The mean difference in the patella-to-lateral femoral condyle distance in the neutral position and at 20° adduction was 0.27 cm (ultrasound), and 0.34 cm (direct measurement), respectively. There were no significant differences between the measurements obtained by US and by direct measurement (Pearson correlation= 0.97, p=0.83). # Conclusion Ultrasound is a valid and reliable method for measuring patellar position relative to the femoral condyle, and the validity data reported here suggest that it can be used with confidence in clinic to assess lateral patellar displacement. # Level of Evidence 3https://doi.org/10.26603/001c.38172 |
| spellingShingle | Lok Yin Ada Kwan Alban Killingback Philip J Adds Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study International Journal of Sports Physical Therapy |
| title | Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study |
| title_full | Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study |
| title_fullStr | Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study |
| title_full_unstemmed | Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study |
| title_short | Ultrasound Measurement of Lateral Patellar Displacement: A Cadaveric Validation Study |
| title_sort | ultrasound measurement of lateral patellar displacement a cadaveric validation study |
| url | https://doi.org/10.26603/001c.38172 |
| work_keys_str_mv | AT lokyinadakwan ultrasoundmeasurementoflateralpatellardisplacementacadavericvalidationstudy AT albankillingback ultrasoundmeasurementoflateralpatellardisplacementacadavericvalidationstudy AT philipjadds ultrasoundmeasurementoflateralpatellardisplacementacadavericvalidationstudy |