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Central Venous Oxygen Saturation Cannot Replace Mixed Venous Saturation in Patients Undergoing Cardiac Surgery

Objective It has been argued that venous oxygen saturation from a central venous catheter (ScvO2 ) could be an inexpensive alternative to mixed venous oxygen saturation (SvO2 ). The aim was to evaluate whether ScvO2 measurements could replace SvO2 readings after cardiac surgery and to analyze factor...

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Published in:Journal of cardiothoracic and vascular anesthesia 2008-12, Vol.22 (6), p.853-857
Main Authors: Lorentzen, Anne-Grethe, MD, Lindskov, Christian, MD, Sloth, Erik, MD, PhD, Jakobsen, Carl-Johan, MD
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cited_by cdi_FETCH-LOGICAL-c409t-fba9f134c920a60c6e1c45bb10250f690af515d1ac25c1be822bec2b58871c8e3
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container_title Journal of cardiothoracic and vascular anesthesia
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creator Lorentzen, Anne-Grethe, MD
Lindskov, Christian, MD
Sloth, Erik, MD, PhD
Jakobsen, Carl-Johan, MD
description Objective It has been argued that venous oxygen saturation from a central venous catheter (ScvO2 ) could be an inexpensive alternative to mixed venous oxygen saturation (SvO2 ). The aim was to evaluate whether ScvO2 measurements could replace SvO2 readings after cardiac surgery and to analyze factors influencing any differences found. Design A prospective observational study. Setting A university hospital. Participants Twenty patients scheduled for elective cardiac surgery. Interventions Patients were followed postoperatively with corresponding ScvO2 /SvO2 measurements. Measurements and Main Results The overall bias between ScvO2 and SvO2 was 1.9. In coronary artery bypass graft (CABG) patients, the bias was 0.6 compared with 6.4 in procedures involving aortic valve replacement. In situations with peripheral saturation (SAT)
doi_str_mv 10.1053/j.jvca.2008.04.004
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The aim was to evaluate whether ScvO2 measurements could replace SvO2 readings after cardiac surgery and to analyze factors influencing any differences found. Design A prospective observational study. Setting A university hospital. Participants Twenty patients scheduled for elective cardiac surgery. Interventions Patients were followed postoperatively with corresponding ScvO2 /SvO2 measurements. Measurements and Main Results The overall bias between ScvO2 and SvO2 was 1.9. In coronary artery bypass graft (CABG) patients, the bias was 0.6 compared with 6.4 in procedures involving aortic valve replacement. In situations with peripheral saturation (SAT) &lt;92%, the bias was 10.7 compared with 0.8 when SAT was ≥99%. In 25.5% of measurements, the ScvO2 was more than 10% different from SvO2 , and in only 50% the difference was less than 5%. Conclusions The ScvO2 and SvO2 measurements are not interchangeable, and, especially in patients undergoing aortic valve surgery, this lack of agreement is crucial. However, the present data indicate that ScvO2 may be used in CABG patients, although it is not completely accurate in terms of absolute venous saturations. A low SAT, low hemoglobin, or low cardiac index increased the venous gap.</description><identifier>ISSN: 1053-0770</identifier><identifier>EISSN: 1532-8422</identifier><identifier>DOI: 10.1053/j.jvca.2008.04.004</identifier><identifier>PMID: 18834841</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Aged ; Anesthesia &amp; Perioperative Care ; cardiac output ; cardiac surgery ; Cardiac Surgical Procedures - methods ; Catheterization, Central Venous - methods ; Critical Care ; Female ; Humans ; Male ; Middle Aged ; mixed venous oxygenation ; Monitoring, Intraoperative - methods ; Oxygen - blood ; Oxygen Consumption - physiology ; Postoperative Care - methods ; Prospective Studies ; venous oxygenation</subject><ispartof>Journal of cardiothoracic and vascular anesthesia, 2008-12, Vol.22 (6), p.853-857</ispartof><rights>Elsevier Inc.</rights><rights>2008 Elsevier Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c409t-fba9f134c920a60c6e1c45bb10250f690af515d1ac25c1be822bec2b58871c8e3</citedby><cites>FETCH-LOGICAL-c409t-fba9f134c920a60c6e1c45bb10250f690af515d1ac25c1be822bec2b58871c8e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18834841$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lorentzen, Anne-Grethe, MD</creatorcontrib><creatorcontrib>Lindskov, Christian, MD</creatorcontrib><creatorcontrib>Sloth, Erik, MD, PhD</creatorcontrib><creatorcontrib>Jakobsen, Carl-Johan, MD</creatorcontrib><title>Central Venous Oxygen Saturation Cannot Replace Mixed Venous Saturation in Patients Undergoing Cardiac Surgery</title><title>Journal of cardiothoracic and vascular anesthesia</title><addtitle>J Cardiothorac Vasc Anesth</addtitle><description>Objective It has been argued that venous oxygen saturation from a central venous catheter (ScvO2 ) could be an inexpensive alternative to mixed venous oxygen saturation (SvO2 ). The aim was to evaluate whether ScvO2 measurements could replace SvO2 readings after cardiac surgery and to analyze factors influencing any differences found. Design A prospective observational study. Setting A university hospital. Participants Twenty patients scheduled for elective cardiac surgery. Interventions Patients were followed postoperatively with corresponding ScvO2 /SvO2 measurements. Measurements and Main Results The overall bias between ScvO2 and SvO2 was 1.9. In coronary artery bypass graft (CABG) patients, the bias was 0.6 compared with 6.4 in procedures involving aortic valve replacement. In situations with peripheral saturation (SAT) &lt;92%, the bias was 10.7 compared with 0.8 when SAT was ≥99%. In 25.5% of measurements, the ScvO2 was more than 10% different from SvO2 , and in only 50% the difference was less than 5%. Conclusions The ScvO2 and SvO2 measurements are not interchangeable, and, especially in patients undergoing aortic valve surgery, this lack of agreement is crucial. However, the present data indicate that ScvO2 may be used in CABG patients, although it is not completely accurate in terms of absolute venous saturations. 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The aim was to evaluate whether ScvO2 measurements could replace SvO2 readings after cardiac surgery and to analyze factors influencing any differences found. Design A prospective observational study. Setting A university hospital. Participants Twenty patients scheduled for elective cardiac surgery. Interventions Patients were followed postoperatively with corresponding ScvO2 /SvO2 measurements. Measurements and Main Results The overall bias between ScvO2 and SvO2 was 1.9. In coronary artery bypass graft (CABG) patients, the bias was 0.6 compared with 6.4 in procedures involving aortic valve replacement. In situations with peripheral saturation (SAT) &lt;92%, the bias was 10.7 compared with 0.8 when SAT was ≥99%. In 25.5% of measurements, the ScvO2 was more than 10% different from SvO2 , and in only 50% the difference was less than 5%. Conclusions The ScvO2 and SvO2 measurements are not interchangeable, and, especially in patients undergoing aortic valve surgery, this lack of agreement is crucial. However, the present data indicate that ScvO2 may be used in CABG patients, although it is not completely accurate in terms of absolute venous saturations. A low SAT, low hemoglobin, or low cardiac index increased the venous gap.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>18834841</pmid><doi>10.1053/j.jvca.2008.04.004</doi><tpages>5</tpages></addata></record>
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subjects Aged
Anesthesia & Perioperative Care
cardiac output
cardiac surgery
Cardiac Surgical Procedures - methods
Catheterization, Central Venous - methods
Critical Care
Female
Humans
Male
Middle Aged
mixed venous oxygenation
Monitoring, Intraoperative - methods
Oxygen - blood
Oxygen Consumption - physiology
Postoperative Care - methods
Prospective Studies
venous oxygenation
title Central Venous Oxygen Saturation Cannot Replace Mixed Venous Saturation in Patients Undergoing Cardiac Surgery
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