Document Detail

Description and validation of a novel liquid metal-free device for venous congestion plethysmography.
MedLine Citation:
PMID:  11007598     Owner:  NLM     Status:  MEDLINE    
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 (K(f)) and isovolumetric venous pressure (Piv) of the limb were assessed noninvasively with both devices in 29 healthy volunteers. We found significantly higher K(f) and Piv values with MSG [4.6 +/- 2.0 x 10(-3) ml. min(-1). mmHg(-1). 100 ml tissue(-1) (K(f) units; K(f)U) and 21.2 +/- 8.1 mmHg for Pvi], than with filtrass, giving values of 3.1 +/- 0.8 K(f)U and 15.1 +/- 7.1 mmHg. Because K(f) 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 K(f) and Piv between filtrass (3.0 +/- 0.7 K(f)U and 15.9 +/- 6.9 mmHg, respectively) and MSG with good calibration signal (3.3 +/- 0. 8 K(f)U and 18.6 +/- 7.1 mmHg, respectively; no significant difference). However, we obtained significantly higher MSG values (5. 6 +/- 2.0 K(f)U 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.
F Christ; A Bauer; D Brügger; M Niklas; I B Gartside; J Gamble
Related Documents :
25122138 - Model study of the pressure build-up during subcutaneous injection.
15871988 - Neonatal resuscitation 3: manometer use in a model of face mask ventilation.
15458068 - Navigation by walking around: using the pressure mat to move in virtual worlds.
12409888 - Wrist blood pressure-measuring devices: a comparative study of accuracy with a standard...
1539848 - Induction and maintenance characteristics of anesthesia with desflurane and nitrous oxi...
21983628 - Predicting the success of non-invasive ventilation in preventing intubation and re-intu...
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  89     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2000-10-25     Completed Date:  2000-11-09     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1577-83     Citation Subset:  IM    
Clinic for Anaesthesiology, Ludwig-Maximilians University Munich, 81377 Munich, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Leg / blood supply*
Plethysmography / instrumentation*,  methods
Regression Analysis
Reproducibility of Results
Veins / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Electrical admittance for filling of the heart during lower body negative pressure in humans.
Next Document:  Effect of transpulmonary pressure on airway diameter and responsiveness of immature and mature rabbi...