Abstract
Introduction
Previous investigators have developed prediction equations to estimate arterial occlusion pressure (AOP) for blood flow restriction (BFR) exercise. Most equations have not been validated and are designed for use with expensive cuff systems. Thus, their implementation is limited for practitioners.
Purpose
To develop and validate an equation to predict AOP in the lower limbs when applying an 18 cm wide thigh sphygmomanometer (SPHYG18cm).
Methods
Healthy adults (n = 143) underwent measures of thigh circumference (TC), skinfold thickness (ST), and estimated muscle cross-sectional area (CSA) along with brachial and femoral systolic (SBP) and diastolic (DBP) blood pressure. Lower-limb AOP was assessed in a seated position at the posterior tibial artery (Doppler ultrasound) using a SPHYG18cm. Hierarchical linear regression models were used to determine predictors of AOP. The best set of predictors was used to construct a prediction equation to estimate AOP. Performance of the equation was evaluated and internally validated using bootstrap resampling.
Results
Models containing measures of either TC or thigh composition (ST and CSA) paired with brachial blood pressures explained the most variability in AOP (54%) with brachial SBP accounting for majority of explained variability. A prediction equation including TC, brachial SBP, and age showed good predictability (R2 = 0.54, RMSE = 7.18 mmHg) and excellent calibration. Mean difference between observed and predicted values was 0.0 mmHg and 95% Limits of Agreement were ± 18.35 mmHg. Internal validation revealed small differences between apparent and optimism adjusted performance measures, suggesting good generalizability.
Conclusion
This prediction equation for use with a SPHYG18cm provided a valid way to estimate lower-limb AOP without expensive equipment.
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Abbreviations
- AOP:
-
Arterial occlusion pressure
- BA-LoA:
-
Bland–Altman limits of agreement
- BIC:
-
Bayesian information criterion
- BFR:
-
Blood flow restriction
- BMI:
-
Body mass index
- CITL:
-
Calibration-in-the-large
- CSA:
-
Cross-sectional area
- DBP:
-
Diastolic blood pressure
- LASSO:
-
Least absolute shrinkage and selection operator
- MSE:
-
Mean square error
- RMSE:
-
Root mean square error
- SBP:
-
Systolic blood pressure
- SEE:
-
Standard error of estimate
- ST:
-
Skinfold thickness
- TC:
-
Thigh circumference
- VIF:
-
Variance inflation factor
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Acknowledgements
We thank Carmen Scarfone, Felix Cottet-Puinel, Luke Moore, and Kyle Wehmanen for their assistance in data collection. We also thank Dr. Kelly Kamm for her valuable input during the data collection and preparation of the manuscript.
Funding
This work was supported by the Michigan Space Grant Consortium, Portage Health Foundation, and Michigan Technological University Health Research Institute.
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Conceptualization: IJW, SJE; Methodology: IJW, EJP, JM, JJD, SJE; Formal analysis and investigation: IJW, IML; Writing—original draft preparation: IJW, SJE; Writing—review and editing: IJW, IML, EJP, JM, JJD, SJE; Funding acquisition: IJW, SJE; Supervision: SJE; IJW, IML, EJP, JM, JJD, SJE approved the final version of the manuscript.
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Communicated by I. Mark Olfert.
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Wedig, I.J., Lennox, I.M., Petushek, E.J. et al. Development of a prediction equation to estimate lower-limb arterial occlusion pressure with a thigh sphygmomanometer. Eur J Appl Physiol 124, 1281–1295 (2024). https://doi.org/10.1007/s00421-023-05352-8
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DOI: https://doi.org/10.1007/s00421-023-05352-8