Change search
ReferencesLink to record
Permanent link

Direct link
Endogenous gas formation: an in vitro study with relevance to gas microemboli during cardiopulmonary bypass
Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Surgery.
Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Surgery.
2012 (English)In: The Journal of extra-corporeal technology, ISSN 0022-1058, Vol. 44, no 3, 126-133 p.Article in journal (Refereed) Published
Abstract [en]

Gas embolism is an identified problem during cardiopulmonary bypass (CPB). Our aim was to analyze the potential influence from gas solubility based on simple physical laws, here called endogenous gas embolism. Gas solubility decreases at higher temperature and gas bubbles are presumably formed at CPB warming. An experimental model to measure gas release was designed. Medium (water or blood retrieved from mediastinal drains, 14.6 mL) was incubated and equilibrated with gas (air, 100% oxygen, or 5% carbon dioxide in air) at low temperature (10 degrees C or 23 degrees C). At warming to 37 degrees C, gas release was digitally measured. Also, the effect of fluid motion was evaluated. At warming, the medium became oversaturated with dissolved gas. When fluid motion was applied, gas was released to form bubbles. This was exemplified by a gas release of .45% (.31/.54, medians and quartile range, volume percent, p = .007) and 1.26% (1.14/ 1.33, p = .003) when blood was warmed from 23 degrees C or 10 degrees C to 37 degrees C, respectively (carbon dioxide 5% in air). Consistent findings were seen for water and with the other types of gas exposure. The theory of endogenous gas embolization was confirmed with gas being released at warming. The endogenous gas formation demonstrated a dynamic pattern with oversaturation and with rapid gas released at fluid motion. The gas release at warming was substantial, in particular when the results were extrapolated to full-scale CPB conditions. The interference from endogenous gas formation should be considered in parallel to external sources of gas microemboli.

Place, publisher, year, edition, pages
2012. Vol. 44, no 3, 126-133 p.
Keyword [en]
cardiopulmonary bypass, gas embolization, microemboli, gas solubility, temperature
National Category
Cardiac and Cardiovascular Systems Surgery
URN: urn:nbn:se:umu:diva-78907PubMedID: 23198392OAI: diva2:638055
Available from: 2013-07-25 Created: 2013-07-25 Last updated: 2014-02-17Bibliographically approved

Open Access in DiVA

No full text


Search in DiVA

By author/editor
Lindholm, LenaEngström, Karl Gunnar
By organisation
Cardiac and Cardiovascular SystemsSurgery

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 16 hits
ReferencesLink to record
Permanent link

Direct link