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Clinical Trial
. 2016 Aug;44(4):832-43.
doi: 10.1177/0300060516635383. Epub 2016 May 2.

Comparison of the non-invasive Nexfin® monitor with conventional methods for the measurement of arterial blood pressure in moderate risk orthopaedic surgery patients

Felix Balzer  1 , Marit Habicher  1 , Michael Sander  2 , Julian Sterr  3 , Stephanie Scholz  1 , Aarne Feldheiser  1 , Michael Müller  4 , Carsten Perka  4 , Sascha Treskatsch  5
Affiliations
Clinical Trial

Comparison of the non-invasive Nexfin® monitor with conventional methods for the measurement of arterial blood pressure in moderate risk orthopaedic surgery patients

Felix Balzer et al. J Int Med Res. 2016 Aug.

Abstract

Objective: Continuous invasive arterial blood pressure (IBP) monitoring remains the gold standard for BP measurement, but traditional oscillometric non-invasive intermittent pressure (NIBP) measurement is used in most low-to-moderate risk procedures. This study compared non-invasive continuous arterial BP measurement using a Nexfin® monitor with NIBP and IBP monitors.

Methods: This was a single-centre, prospective, pilot study in patients scheduled for elective orthopaedic surgery. Systolic BP, diastolic BP and mean arterial blood pressure (MAP) were measured by Nexfin®, IBP and NIBP at five intraoperative time-points. Pearson correlation coefficients, Bland-Altman plots and trending ability of Nexfin® measurements were used as criteria for success in the investigation of measurement reliability.

Results: A total of 20 patients were enrolled in the study. For MAP, there was a sufficient correlation between IBP/Nexfin® (Pearson = 0.75), which was better than the correlation between IBP/NIBP (Pearson = 0.70). Bland-Altman analysis of the data showed that compared with IBP, there was a higher percentage error for MAPNIBP (30%) compared with MAPNexfin® (27%). Nexfin® and NIBP underestimated systolic BP; NIBP also underestimated diastolic BP and MAP. Trending ability for MAPNexfin® and MAPNIBP were comparable to IBP.

Conclusion: Non-invasive BP measurement with Nexfin® was comparable with IBP and tended to be more precise than NIBP.

Keywords: Blood pressure; Nexfin® Trial registration: ClinGov. NCT01263990; invasive arterial pressure; monitoring; non-invasive arterial pressure.

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Figures

Figure 1.
Figure 1.
Pearson correlation plots between Nexfin® (NexF) and invasively measured blood pressure (IBP) for mean (a) systolic (syst), (b) diastolic (diast), and (c) mean arterial blood pressure (map) values. Bland–Altman plots between Nexfin® and IBP for mean (d) systolic (syst), (e) diastolic (diast), and (f) mean arterial blood pressure (map) measurements.
Figure 2.
Figure 2.
Pearson correlation plots between non-invasively measured blood pressure (NIBP) and mean values for invasively measured BP (IBP) for (a) systolic (syst), (b) diastolic (diast), and (c) mean arterial blood pressure (map) values. Bland–Altman plots between NIBP and mean values for IBP for (d) systolic (syst), (e) diastolic (diast), and (f) mean arterial blood pressure (map) measurements.
Figure 3.
Figure 3.
Polar plots displaying the trending ability of (a) mean IBP and Nexfin® values and (b) mean IBP values and NIBP for mean arterial pressure (MAP) measurements. Radial ULOA, radial upper limit of agreement; Radial LLOA, radial lower limit of agreement.
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References

    1. Arora S, Singh PM, Goudra BG, et al. Changing trends of hemodynamic monitoring in ICU - from invasive to non-invasive methods: are we there yet? Int J Crit Illn Inj Sci 2014; 4: 168–177. - PMC - PubMed
    1. Cousins TR, O’Donnell JM. Arterial cannulation: a critical review. AANA J 2004; 72: 267–271. - PubMed
    1. Penáz J. Criteria for set point estimation in the volume clamp method of blood pressure measurement. Physiol Res 1992; 41: 5–10. - PubMed
    1. Dorlas JC, Nijboer JA, Butijn WT, et al. Effects of peripheral vasoconstriction on the blood pressure in the finger, measured continuously by a new noninvasive method (the Finapres). Anesthesiology 1985; 62: 342–345. - PubMed
    1. Wesseling KH, de Wit B, van der Hoeven GM. Physiocal, calibrating finger vascular physiology for Finapres. Homeostasis 1995; 36: 67–82.

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