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Respiratory variations in the photoplethysmographic waveform: acute hypovolaemia during spontaneous breathing is not detected
Linköping University, Department of Medical and Health Sciences, Anesthesiology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Anaesthetics, Operations and Specialty Surgery Center, Department of Anaesthesiology and Intensive Care in Linköping. Östergötlands Läns Landsting, Anaesthesiology and Surgical Centre.
Linköping University, Department of Medical and Health Sciences, Pharmacology. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Medical and Health Sciences, Physiology. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Medical and Health Sciences, Physiology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart Centre, Department of Thoracic and Vascular Surgery.ORCID iD: 0000-0002-9095-403X
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2010 (English)In: Physiological Measurement, ISSN 0967-3334, E-ISSN 1361-6579, Vol. 31, no 7, 953-962 p.Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
Iop Publishing , 2010. Vol. 31, no 7, 953-962 p.
Keyword [en]
photoplethysmography; monitoring; cardiopulmonary; monitoring; non-invasive; blood volume; hypovolaemia
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-58255DOI: 10.1088/0967-3334/31/7/006ISI: 000279269900006OAI: oai:DiVA.org:liu-58255DiVA: diva2:337975
Available from: 2010-08-10 Created: 2010-08-09 Last updated: 2017-12-12

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Nilsson, LenaLindenberger, MarcusLänne, TosteJohansson, Anders

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Nilsson, LenaLindenberger, MarcusLänne, TosteJohansson, Anders
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AnesthesiologyFaculty of Health SciencesDepartment of Anaesthesiology and Intensive Care in LinköpingAnaesthesiology and Surgical CentrePharmacologyPhysiologyDepartment of Thoracic and Vascular SurgeryPhysiological MeasurementsThe Institute of Technology
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Physiological Measurement
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