Panoramic ultrasound detected a statistically significant decrease in the VM CSA of participants after 70 days of bedrest without exercise.https://knowledgeconnection.mainehealth.org/lambrew-retreat-2021/1030/thumbnail.jp

Chin, Kaitlyn

Dexter, William

Holt, Christina

Minnehan, Kaitlin

Scharnetzki, Elizabeth

English

MaineHealth Knowledge Connection

MaineHealth MaineHealth Knowledge Connection Costas T. Lambrew Research Retreat 2021 Costas T. Lambrew Research Retreat 2021 Measuring Vastus Medialis Cross-Sectional Area with Panoramic Ultrasound Over Time Kaitlin Minnehan Maine Medical Center Elizabeth Scharnetzki Maine Medical Center Kaitlyn Chin Christina Holt Maine Medical Center William Dexter Maine Medical Center Follow this and additional works at: https://knowledgeconnection.mainehealth.org/lambrew-retreat-2021  Part of the Orthopedics Commons, and the Sports Medicine Commons Recommended Citation Minnehan, Kaitlin; Scharnetzki, Elizabeth; Chin, Kaitlyn; Holt, Christina; and Dexter, William, "Measuring Vastus Medialis Cross-Sectional Area with Panoramic Ultrasound Over Time" (2021). Costas T. Lambrew Research Retreat 2021. 37. https://knowledgeconnection.mainehealth.org/lambrew-retreat-2021/37 This Book is brought to you for free and open access by the Costas T. Lambrew Research Retreat at MaineHealth Knowledge Connection. It has been accepted for inclusion in Costas T. Lambrew Research Retreat 2021 by an authorized administrator of MaineHealth Knowledge Connection. Measuring Vastus Medialis Cross-Sectional Area with Panoramic Ultrasound Over Time Kaitlin Minnehan, MD1, Elizabeth Scharnetzki, PhD2, Kaitlyn Chin3, Christina Holt, MD, MSc4, William Dexter, MD11Department of Orthopedics and Sports Medicine, Maine Medical Partners, Scarborough, ME; 2Center for Outcomes Research and Evaluation, Maine Medical Center Research Institute, Portland, ME; Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL 4Department of Family Medicine, Maine Medical Partners Portland, ME ● Vastus medialis (VM) contributes to knee pain● Strength difficult to measure● Cross-sectional area (CSA) correlates to muscle strength● Previous study validated panoramic ultrasound (US) to measure CSA of VM ● Assessing change in VM CSA over time can help with rehabilitation BackgroundMeasure the change in VM CSA after 70 days of bedrest  with panoramic US-Control group: bedrest without exercise-Group A: exercise-Group B: exercise with supplemental testosterone ● Prospective cohort study● 27 subjects (26 male,1 female; age:34.5 +/- 7.8 yrs)● 70 days of bed rest at 6-degree head down tilt● MRI and US images of right lower extremity○ 13 time points● Oil-filled templates to identify location● Horizontal strength and treadmillNASA MethodsObjectiveMMC Methods● Secondary data analysis using de-identified images● 25 subjects (2 excluded due to poor image quality)● Control group (N=9): did not exercise● Group A (N=8): strength training and cardiovascular training while horizontal● Group B (N=8): strength training and cardiovascular training plus testosterone (IM 100 mg/2 week)Figure 1: Vertical treadmill ResultsFigure 2: Outline of VM in ImageJData Analysis● Used distal image of the thigh at two time points● ImageJ software (NIH)○ Outlined the VM in US with freehand function○ Calculated CSA● 1-way ANOVA ● SPSS for data analysisGroupChange in CSA (cm^2) p value d value Control(no exercise) -2.7 0.027 0.89Group A(exercise only) 0.525 0.616 0.19Group B(exercise + T) 0.09 0.933 0.03Panoramic ultrasound detected a statistically significant decrease in the VM CSA of participants after 70 days of bedrest without exercise. There was no statistically significant change in VM CSA in participants who underwent exercise alone or exercise plus testosterone while on bedrest. Conclusion

Measuring Vastus Medialis Cross-Sectional Area with Panoramic Ultrasound Over Time

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Measuring Vastus Medialis Cross-Sectional Area with Panoramic Ultrasound Over Time

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