Brekke Anders Falk, Sørensen Anders Nordahl, Buhr Christel, Johannesdottír Íris O, Jakobsen Thomas Linding
University College Absalon, Center of Nutrition and Rehabilitation, Department of Physiotherapy, Region Zealand, Denmark.
Section for Orthopaedic and Sports Rehabilitation (SOS-R), Centre of Rehabilitation - Nørrebro, Health Centre Nørrebro, City of Copenhagen, Denmark.
Int J Sports Phys Ther. 2020 Oct;15(5):783-791. doi: 10.26603/ijspt20200783.
The limb occlusion pressure (LOP) is determined to calculate the relative LOP. The different levels of relative LOP (percentage of LOP) influence the treatment effect and perceived discomfort during low-load blood flow restriction (BFR) strength training. Thus, determining the LOP is of the utmost importance when using BFR in clinical practice.
The objective of this study was to investigate the concurrent validity and intra-rater (test-retest), intra-day reliability of an inexpensive, portable, easy-to-use handheld (HH) oximeter compared to a high-resolution Doppler ultrasound scanner in detecting LOP in the lower extremity.
Cross-sectional validity and reliability study.
Two raters who were blinded from each other simultaneously assessed 50 healthy participants (mean age of 25.8 years). A 20 cm-wide thigh cuff with an attached sphygmomanometer was inflated until the raters independently registered the LOP with the HH oximeter and the Doppler ultrasound scanner. The test session was repeated once after a five-minute time interval.
The HH oximeter recorded a non-significantly higher LOP than the Doppler ultrasound scanner, with a mean difference of 6.3 mmHg in the test session (95% limits of agreement (LoA): -16.2 to 28.8, p = 0.13) and 5.4 mmHg in the retest session (95% LoA: -13.3 to 24.0, p = 0.10). The intra-rater reliability for both devices was moderate (ICC = 0.72-0.79). The measured LOP was significantly lower (p < 0.005) in the retest session than in the test session for both the HH oximeter (mean difference: -5.7 mmHg) and the Doppler ultrasound scanner (mean difference: -4.8 mmHg).
The HH oximeter is a valid and reliable measuring device for determining the LOP in the lower extremity in healthy adults. The authors recommend performing at least two LOP measurements with a one-minute rest interval.
2, Validity and reliability study.
测定肢体阻断压力（LOP）以计算相对LOP。不同水平的相对LOP（LOP百分比）会影响低负荷血流限制（BFR）力量训练期间的治疗效果和感知不适。因此，在临床实践中使用BFR时，确定LOP至关重要。
本研究的目的是调查一种价格低廉、便于携带、易于使用的手持式（HH）血氧饱和度仪与高分辨率多普勒超声扫描仪相比，在检测下肢LOP方面的同时效度以及评估者内（重测）、日内可靠性。
横断面效度和可靠性研究。
两名互不了解情况的评估者同时对50名健康参与者（平均年龄25.8岁）进行评估。使用一个附有血压计的20厘米宽的大腿袖带充气，直到评估者分别使用HH血氧饱和度仪和多普勒超声扫描仪记录到LOP。在五分钟的时间间隔后，测试环节重复一次。
HH血氧饱和度仪记录的LOP略高于多普勒超声扫描仪，但差异无统计学意义，测试环节的平均差值为6.3 mmHg（95%一致性界限（LoA）：-16.2至28.8，p = 0.13），重测环节的平均差值为5.4 mmHg（95% LoA：-13.3至24.0，p = 0.10）。两种设备的评估者内可靠性均为中等（组内相关系数（ICC）= 0.72 - 0.79）。对于HH血氧饱和度仪（平均差值：-5.7 mmHg）和多普勒超声扫描仪（平均差值：-4.8 mmHg），重测环节测得的LOP均显著低于测试环节（p < 0.005）。
HH血氧饱和度仪是一种用于确定健康成年人下肢LOP的有效且可靠的测量设备。作者建议至少进行两次LOP测量，每次测量之间休息一分钟。
2，效度和可靠性研究。
