Document Detail

Marked hypercapnia during cardiopulmonary bypass for myocardial revascularization. Case report.
MedLine Citation:
PMID:  19475218     Owner:  NLM     Status:  PubMed-not-MEDLINE    
BACKGROUND AND OBJECTIVES: Bypassing heart blood and returning it oxygenated to systemic circulation is achieved at the expenses of major cardiopulmonary physiologic changes. The aim of this report was to present an anesthetic complication during CPB and to warn for the need of interaction of the whole anesthetic-surgical team to prevent adverse perioperative events.
CASE REPORT: A brown female patient, 56 years old, 95 kg, height 1.65 m, physical status ASA IV, with chronic renal failure under hemodialysis was admitted for myocardial revascularization. Monitoring consisted of ECG, invasive blood pressure, pulse oximetry, capnography, esophageal temperature, central venous pressure and anesthetic gases analysis. Patient was premedicated with intravenous midazolam (0.05 mg kg(-1)). Anesthesia was induced with fentanyl (16 microg kg(-1)), etomidate (0.3 mg kg(-1)) and pancuronium (0.1 mg kg(-1)), and was maintained with O2, isoflurane (0.5 - 1 MAC) and fentanyl continuous infusion. Blood gas analysis after induction has shown: pH: 7.41; PaO2: 288 mmHg; PaCO2: 38 mmHg; HCO3: 24 mmol L(-1); BE: 0 mmol L(-1); SatO2 100%. A second blood gases analysis, sampled soon after CPB, returned in 30 minutes, showing: pH 7.15; PaO2: 86 mmHg; PaCO2 224 mmHg; HCO3: 29 mmol L(-1); BE: -3 mmol L(-1); SatO2 99%. Thorough and urgent checking of anesthetic and perfusion equipment was performed and revealed that the gas blender was connected to the O2 line and to a CO2 cylinder, when it should be connected to the compressed air cylinder.
CONCLUSIONS: Bypass circuit mechanical problems may occur in the intraoperative period, and demand prompt repairs. Technological advances in anesthesia equipment, monitoring and safety standards will lessen the possibility of cases such as this to be repeated, but will never replace anesthesiologists surveillance.
Maurício Serrano Nascimento; Cassiano Franco Bernardes; Roberta Louro de Medeiros
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Revista brasileira de anestesiologia     Volume:  52     ISSN:  1806-907X     ISO Abbreviation:  Rev Bras Anestesiol     Publication Date:  2002 Apr 
Date Detail:
Created Date:  2009-05-28     Completed Date:  2009-12-16     Revised Date:  2014-02-05    
Medline Journal Info:
Nlm Unique ID:  0401316     Medline TA:  Rev Bras Anestesiol     Country:  Brazil    
Other Details:
Languages:  eng; por     Pagination:  231-5     Citation Subset:  -    
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