|
|
||||||||
1 Clinic for Anaesthesiology, Ludwig-Maximilians University Munich, 81377 Munich, Germany; and Departments of 2 Physiology and 3 Paediatrics, Imperial College School of Medicine, London UB7, United Kingdom
We present a newly developed
electromechanical sensor with automated calibration for strain-gauge
plethysmography (filtrass) and compare it to a conventional
mercury-in-Silastic strain-gauge plethysmograph (MSG). Fluid filtration
capacity (Kf) and isovolumetric venous pressure
(Piv) of the limb were assessed noninvasively with both devices in 29 healthy volunteers. We found significantly higher Kf and
Piv values with MSG [4.6 ± 2.0 × 10
3
ml · min
1 · mmHg
1 · 100 ml tissue
1 (Kf units;
KfU) and 21.2 ± 8.1 mmHg for Pvi], than
with filtrass, giving values of 3.1 ± 0.8 KfU and 15.1 ± 7.1 mmHg. Because
Kf and Piv are profoundly influenced by the
calibration, we investigated the quality of the calibration signal and
its impact on the obtained values. We could show that the
reproducibility of repeated calibrations was higher with filtrass (58%
lower mean ± SD). The data were grouped according to the
quality of calibration, and we found no significant difference in
Kf and Piv between filtrass (3.0 ± 0.7 KfU and 15.9 ± 6.9 mmHg, respectively) and
MSG with good calibration signal (3.3 ± 0.8 KfU and 18.6 ± 7.1 mmHg, respectively; no
significant difference). However, we obtained significantly higher MSG values (5.6 ± 2.0 KfU and
23.1 ± 8.4 mmHg, respectively; P < 0.001) in the
group with a bad calibration signal. We suggest that the filtrass
sensor, which performs an automatic, standardized calibration procedure
and shows a linear signal response to stretch, gives highly
reproducible and reliable results and thus is more suitable for routine application.
fluid filtration capacity; isovolumetric venous pressure; noninvasive microcirculatory measurement
This article has been cited by other articles:
![]() |
A. O. Stirban and D. Tschoepe Cardiovascular Complications in Diabetes: Targets and interventions Diabetes Care, February 1, 2008; 31(Supplement_2): S215 - S221. [Abstract] [Full Text] [PDF] |
||||
![]() |
H. A.J. Struijker-Boudier, A. E. Rosei, P. Bruneval, P. G. Camici, F. Christ, D. Henrion, B. I. Levy, A. Pries, and J.-L. Vanoverschelde Evaluation of the microcirculation in hypertension and cardiovascular disease Eur. Heart J., December 1, 2007; 28(23): 2834 - 2840. [Abstract] [Full Text] [PDF] |
||||
![]() |
P. Pickkers, M. J. Dorresteijn, M. P.W.J.M. Bouw;, J. G. van der Hoeven, and P. Smits In Vivo Evidence for Nitric Oxide-Mediated Calcium-Activated Potassium-Channel Activation During Human Endotoxemia Circulation, August 1, 2006; 114(5): 414 - 421. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. J. Dorresteijn, L. T. van Eijk, M. G. Netea, P. Smits, J. G. van der Hoeven, and P. Pickkers Iso-osmolar prehydration shifts the cytokine response towards a more anti-inflammatory balance in human endotoxemia Innate Immunity, October 1, 2005; 11(5): 287 - 293. [Abstract] [PDF] |
||||
![]() |
S. S. Dhillon, K. Mahadevan, V. Bandi, Z. Zheng, C. W. Smith, and R. E. Rumbaut Neutrophils, Nitric Oxide, and Microvascular Permeability in Severe Sepsis Chest, September 1, 2005; 128(3): 1706 - 1712. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. Gamble, M. J. Joyner, N. M. Dietz, and J. T. Shepherd A restrospective perspective J Appl Physiol, February 1, 2005; 98(2): 762 - 763. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. J. Leslie, T. Attina, E. Hultsch, L. Bolscher, M. Grossman, M. A. Denvir, and D. J. Webb Comparison of two plethysmography systems in assessment of forearm blood flow J Appl Physiol, May 1, 2004; 96(5): 1794 - 1799. [Abstract] [Full Text] [PDF] |
||||
![]() |
A Bauer, D Bruegger, J Gamble, and F Christ Influence of different cuff inflation protocols on capillary filtration capacity in human calves - a congestion plethysmography study J. Physiol., September 15, 2002; 543(3): 1025 - 1031. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. Anim-Nyame, S. R Sooranna, M. R Johnson, J. Gamble, and P. J Steer A longitudinal study of resting peripheral blood flow in normal pregnancy and pregnancies complicated by chronic hypertension and pre-eclampsia Cardiovasc Res, June 1, 2001; 50(3): 603 - 609. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Visit Other APS Journals Online |