Document Detail


Evolving selective cerebral perfusion for aortic arch replacement: high flow rate with moderate hypothermic circulatory arrest.
MedLine Citation:
PMID:  19021987     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Although hypothermic circulatory arrest (HCA) combined with selective cerebral perfusion (SCP) is a safe strategy for aortic arch surgery, neither the optimal temperature of hypothermia nor the optimal SCP flow rate has been clearly determined. We have since 2002 gradually elevated the temperature of HCA from 20 degrees C to 28 degrees C for aortic arch surgery. This study explored the impact of different temperatures during HCA with SCP on neurologic complications. METHODS: Since January 2002, 229 patients have undergone aortic arch replacement (mean age, 70.8 +/- 9.7 years; 156 male) with HCA and SCP through median sternotomy in our institution. Eighty-one patients were cooled to 20 degrees C (group A), 81 were cooled to 25 degrees C (group B), and 67 were cooled to 28 degrees C (group C). The brachiocephalic and left common carotid arteries were perfused separately during SCP in all cases. The left subclavian artery was additionally perfused in group C. Twenty-two operations in group A, 17 in group B, and 6 in group C were performed emergently (p = 0.58). The SCP flow rate was maintained at approximately 10 mL.kg(-1).min(-1) in groups A and B and approximately 15 mL.kg(-1).min(-1) in group C to keep blood pressure in the temporal artery at approximately 60 mm Hg. RESULTS: The early mortality rate was 3.7% (3 of 81) in group A, 0% in group B, and 1.5% (1 of 67) in group C (p = 0.19). Postoperative stroke occurred in 2 patients (2.5%) in group A, in 3 (3.7%) in group B, and in 4 (6.0%) in group C (p = 0.55). Postoperative transient neurologic dysfunction occurred in 7 patients (8.6%) in group A, in 9 patients (11.1%) in group B, and in 4 patients (6.0%) in group C (p = 0.54). No patients in any group had postoperative paraplegia. The mean durations of circulatory arrest were 64 +/- 21 minutes in group A, 49 +/- 14 minutes in group B, and 46 +/- 13 minutes in group C (p < 0.0001). The mean durations of SCP were 145 +/- 67 minutes in group A, 116 +/- 48 minutes in group B, and 111 +/- 61 minutes in group C (p = 0.0007). Mean SCP flow rates were 8.8 +/- 1.9 mL.kg(-1).min(-1) in group A, 10.5 +/- 3.1 mL.kg(-1).min(-1) in group B, and 19.0 +/- 4.2 mL.kg(-1).min(-1) in group C (p < 0.0001). CONCLUSIONS: The rate of postoperative neurologic events did not increase with use of higher temperature. The temperature during HCA could be safely increased to 28 degrees C with high SCP flow rate. Use of moderate HCA with SCP during aortic arch replacement permits radical reconstruction of the aortic arch and can avoid the need for deep hypothermia.
Authors:
Kenji Minatoya; Hitoshi Ogino; Hitoshi Matsuda; Hiroaki Sasaki; Hiroshi Tanaka; Junjiro Kobayashi; Toshikatsu Yagihara; Soichiro Kitamura
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Annals of thoracic surgery     Volume:  86     ISSN:  1552-6259     ISO Abbreviation:  Ann. Thorac. Surg.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-21     Completed Date:  2009-01-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  15030100R     Medline TA:  Ann Thorac Surg     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1827-31     Citation Subset:  AIM; IM    
Affiliation:
Department of Cardiovascular Surgery, National Cardiovascular Center, Suita, Osaka, Japan.
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Analysis of Variance
Angiography
Aorta, Thoracic / surgery*
Aortic Aneurysm, Thoracic / mortality,  radiography,  surgery*
Blood Flow Velocity
Blood Vessel Prosthesis Implantation / adverse effects*,  methods
Brain Ischemia / prevention & control*
Cerebrovascular Circulation / physiology
Circulatory Arrest, Deep Hypothermia Induced / methods*
Cohort Studies
Combined Modality Therapy
Female
Follow-Up Studies
Humans
Male
Middle Aged
Perfusion / methods
Probability
Retrospective Studies
Risk Assessment
Survival Analysis
Treatment Outcome
Comments/Corrections
Comment In:
Ann Thorac Surg. 2008 Dec;86(6):1831-2   [PMID:  19021988 ]

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