Quick Search:

uzh logo
Browse by:

Zurich Open Repository and Archive

Maintenance: Tuesday, 5.7.2016, 07:00-08:00

Maintenance work on ZORA and JDB on Tuesday, 5th July, 07h00-08h00. During this time there will be a brief unavailability for about 1 hour. Please be patient.

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-40844

Roediger, R; Beck-Schimmer, B; Theusinger, O M; Rusch, D; Seifert, B; Spahn, D R; Schmid, E R; Baulig, W (2011). The revised digital transcutaneous PCO2/SpO2 Ear Sensor is a reliable noninvasive monitoring tool in patients after cardiac surgery. Journal of Cardiothoracic and Vascular Anesthesia, 25(2):243-249.

Accepted Version
View at publisher
[img]Published Version
PDF - Registered users only


OBJECTIVE:: The aim of this study was to validate the revised SenTec V-Sign 2 sensor (SenTec AG, Therwil, Switzerland) for combined noninvasive continuous assessment of pulse rate, pulse oximetry (SpO(2)), and transcutaneous carbon dioxide tension (PtcCO(2)) in adults after cardiac surgery. DESIGN:: A prospective clinical study. SETTING:: A single-center university hospital. PARTICIPANTS:: Twenty adult patients aged 36 to 84 years after cardiac surgery. INTERVENTIONS:: SpO(2) and PtcCO(2) values of three V-Sign 2 sensors (SenTec AG) attached at the earlobe, forehead, and cheek and SpO(2) values of the Nellcor Durasensor (Model DS-100A; Nellcor Puritan Bennett Inc, Pleasanton, CA) were compared with simultaneous measurements of blood gases and end-expiratory carbon dioxide. MEASUREMENTS AND MAIN RESULTS:: Measurements were performed during periods of hyper-, normo-, and hypocapnia and then at 30-minute intervals up to 5 hours. Bland-Altman analysis and simple regression analysis were used. RESULTS:: The detection failures for PtcCO(2) were 0.3% to 1.3%, for SpO(2) 10% to 25%, and for pulse rate 5% to 10%. The V-Sign 2 earlobe sensor provided the best results. The mean bias and limits of agreement for PtcCO(2ear) and PaCO(2) were 1.1 and -3.4/+5.5 mmHg. The drift of PtcCO(2) was negligible at all locations. The mean bias and limits of agreement of V-Sign SpO(2ear) and SaO(2), as well as V-Sign pulse rate and the electrocardiogram, were -1.7% and -6.8/+3.9% and 1.2 beats/min and -3.3/+5.8 beats/min. End-expiratory carbon dioxide showed a weak correlation with PaCO(2) (r(2) = 0.47). CONCLUSIONS:: Transcutaneous capnometry using the revised V-Sign 2 sensor at the earlobe is a reliable monitoring tool during the recovery period of patients after cardiac surgery. This approach has the potential to reduce the number of arterial blood gas samples.


5 citations in Web of Science®
8 citations in Scopus®
Google Scholar™



146 downloads since deposited on 17 Jan 2011
13 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Epidemiology, Biostatistics and Prevention Institute (EBPI)
04 Faculty of Medicine > University Hospital Zurich > Institute of Anesthesiology
Dewey Decimal Classification:610 Medicine & health
Date:April 2011
Deposited On:17 Jan 2011 13:13
Last Modified:05 Apr 2016 14:30
Publisher DOI:10.1053/j.jvca.2010.06.021
Related URLs:http://www.zora.uzh.ch/46458/
PubMed ID:20851636

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page