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Respiratory variations in the photoplethysmographic waveform: acute hypovolaemia during spontaneous breathing is not detected
Linköpings universitet, Institutionen för medicin och hälsa, Anestesiologi med intensivvård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Sinnescentrum, Anestesi- och intensivvårdskliniken US. Östergötlands Läns Landsting, Anestesi- och operationscentrum.
Linköpings universitet, Institutionen för medicin och hälsa, Farmakologi. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för medicin och hälsa, Fysiologi. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för medicin och hälsa, Fysiologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Hjärtcentrum, Thorax-kärlkliniken.ORCID-id: 0000-0002-9095-403X
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2010 (engelsk)Inngår i: Physiological Measurement, ISSN 0967-3334, E-ISSN 1361-6579, Vol. 31, nr 7, s. 953-962Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Recent studies using photoplethysmographic (PPG) signals from pulse oximeters have shown potential to assess hypovolaemia during spontaneous breathing. This signal is heavily filtered and reports are based on respiratory variations in the small pulse synchronous variation of PPG. There are stronger respiratory variations such as respiratory synchronous variation (PPGr) in the baseline of the unfiltered PPG signal. We hypothesized that PPGr would increase during hypovolaemia during spontaneous breathing. Hemodynamic and respiratory data were recorded together with PPG infrared signals from the finger, ear and forearm from 12 healthy male volunteers, at rest and during hypovolaemia created by the application of a lower body negative pressure (LBNP) of 15, 30 and 60 cmH(2)O. Hemodynamic and respiratory values changed significantly. From rest to the LBNP of 60 cmH(2)O systolic blood pressure fell from median (IQR) 116 (16) to 101 (23) mmHg, the heart rate increased from 58 (16) to 73 (16) beats min(-1), and the respiratory rate increased from 9.5 (2.0) to 11.5 (4.0) breaths min(-1). The amplitude of PPGr did not change significantly at any measurement site. The strongest effect was seen at the ear, where the LBNP of 60 cmH(2)O gave an amplitude increase from 1.0 (0.0) to 1.31 (2.24) AU. PPG baseline respiratory variations cannot be used for detecting hypovolaemia in spontaneously breathing subjects.

sted, utgiver, år, opplag, sider
Iop Publishing , 2010. Vol. 31, nr 7, s. 953-962
Emneord [en]
photoplethysmography; monitoring; cardiopulmonary; monitoring; non-invasive; blood volume; hypovolaemia
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-58255DOI: 10.1088/0967-3334/31/7/006ISI: 000279269900006OAI: oai:DiVA.org:liu-58255DiVA, id: diva2:337975
Tilgjengelig fra: 2010-08-10 Laget: 2010-08-09 Sist oppdatert: 2017-12-12

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Nilsson, LenaLindenberger, MarcusLänne, TosteJohansson, Anders

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