uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Pulmonary artery pulsatility is the main cause of cardiogenic oscillations
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Hedenstierna laboratory.
Show others and affiliations
2013 (English)In: Journal of clinical monitoring and computing, ISSN 1387-1307, E-ISSN 1573-2614, Vol. 27, no 1, 47-53 p.Article in journal (Refereed) Published
Abstract [en]

The genesis of cardiogenic oscillations, i.e. The small waves in airway pressure (COSpaw) and flow (COSflow) signals recorded at the airway opening is under debate. We hypothesized that these waves are originated from cyclic changes in pulmonary artery (PA) pressure and flow but not from the physical transmission of heartbeats onto the lungs. The aim of this study was to test this hypothesis. In 10 anesthetized pigs, COS were evaluated during expiratory breath-holds at baseline with intact chest and during open chest conditions at: (1) close contact between heart and lungs; (2) no heart-lungs contact by lifting the heart apex outside the thoracic cavity; (3) PA clamping at the main trunk during 10 s; and (4) during manual massage after cardiac arrest maintaining the heart apex outside the thorax, with and without PA clamping. Baseline COSpaw and COSflow amplitude were 0.70 ± 0.08 cmH2O and 0.51 ± 0.06 L/min, respectively. Both COS amplitude decreased during open chest conditions in step 1 and 2 (p < 0.05). However, COSpaw and COSflow amplitude did not depend on whether the heart was in contact or isolated from the surrounding lung parenchyma. COSpaw and COSflow disappeared when pulmonary blood flow was stopped after clamping PA in all animals. Manual heart massages reproduced COS but they disappeared when PA was clamped during this maneuver. The transmission of PA pulsatilty across the lungs generates COSpaw and COSflow measured at the airway opening. This information has potential applications for respiratory monitoring.

Place, publisher, year, edition, pages
2013. Vol. 27, no 1, 47-53 p.
Keyword [en]
Cardiogenic oscillations, Heart-lungs interaction, PEEP, Pulmonary blood flow, Ventilation
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-194886DOI: 10.1007/s10877-012-9391-8ISI: 000313712600003OAI: oai:DiVA.org:uu-194886DiVA: diva2:606709
Available from: 2013-02-20 Created: 2013-02-19 Last updated: 2013-02-25Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Suarez-Sipmann, Fernando
By organisation
Hedenstierna laboratory
In the same journal
Journal of clinical monitoring and computing
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 284 hits
ReferencesLink to record
Permanent link

Direct link