Broholm Rikke, Wiinberg Niels, Simonsen Lene
Department of Clinical Physiology and Nuclear Medicine, Bispebjerg and Frederiksberg Hospital, University of Copenhagen , Denmark.
Scand J Clin Lab Invest. 2014 Sep;74(6):555-9. doi: 10.3109/00365513.2014.903431. Epub 2014 Apr 13.
Measurement of the ankle and toe pressures are often performed using a plethysmograph, compression cuffs and a strain gauge. Usually, the strain gauge contains mercury but other alternatives exist. From 2014, the mercury-containing strain gauge will no longer be available in the European Union. The aim of this study was to compare an indium-gallium strain gauge to the established mercury-containing strain gauge.
Consecutive patients referred to the Department of Clinical Physiology and Nuclear Medicine at Bispebjerg and Frederiksberg Hospitals for measurements of systolic ankle and toe pressures volunteered for the study. Ankle and toe pressures were measured twice with the mercury and the indium-gallium strain gauge in random order. Comparison of the correlation between the mean pressure using the mercury and the indium-gallium device and the difference between the two devices was performed for both toe and ankle level.
A total of 53 patients were included (36 male). Mean age was 69 (range, 45-92 years). Mean pressures at toe and ankle level with the mercury and the indium-gallium strain gauges were 77 (range, 0-180) mm Hg and 113 (range, 15-190) mm Hg, respectively. Comparison between the mercury and the indium-gallium strain gauge showed a difference in toe blood pressure values of - 0.7 mm Hg (SD: 7.0). At the ankle level, a difference of 2.0 mm Hg (SD: 8.6) was found.
The two different devices agree sufficiently in the measurements of systolic ankle and toe pressure for the indium-gallium strain gauge to replace the mercury strain gauge.
踝部和趾部压力的测量通常使用体积描记器、加压袖带和应变片来进行。通常，应变片中含有汞，但也有其他替代品。自2014年起，含汞应变片在欧盟将不再可用。本研究的目的是将铟镓应变片与已有的含汞应变片进行比较。
连续有患者被转诊至比斯佩布杰尔格医院和腓特烈斯贝医院的临床生理学与核医学科，以测量收缩期踝部和趾部压力，这些患者自愿参与本研究。使用汞应变片和铟镓应变片以随机顺序对踝部和趾部压力进行两次测量。对使用汞应变片和铟镓装置测得的平均压力之间的相关性以及两种装置之间的差异在趾部和踝部水平均进行了比较。
共纳入53例患者（36例男性）。平均年龄为69岁（范围45 - 92岁）。使用汞应变片和铟镓应变片时，趾部和踝部水平的平均压力分别为77 mmHg（范围0 - 180）和113 mmHg（范围15 - 190）。汞应变片和铟镓应变片之间的比较显示，趾部血压值的差异为 - 0.7 mmHg（标准差：7.0）。在踝部水平，发现差异为2.0 mmHg（标准差：8.6）。
两种不同装置在收缩期踝部和趾部压力测量方面的一致性足以使铟镓应变片替代汞应变片。
