Document Detail


Isoflurane versus sodium nitroprusside for the control of proximal hypertension during thoracic aortic cross-clamping: effects on spinal cord ischemia.
MedLine Citation:
PMID:  8547547     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: This study was designed to compare the effects of isoflurane and nitroprusside on spinal cord ischemia when they are used to control proximal hypertension during thoracic aortic cross-clamping (TACC). DESIGN: Prospective, randomized, blinded experimental study. SETTING: Laboratory and animal research facility. PARTICIPANTS: Adult mongrel dogs. INTERVENTIONS: Two groups of eight dogs had TACC for 45 minutes. Proximal aortic, distal aortic, and cerebrospinal pressure was calculated as the distal mean pressure minus the CSF pressure. Group 1 received nitroprusside and group 2 received isoflurane to control proximal hypertension during cross-clamping. The dogs were neurologically evaluated 24 and 48 hours later by an observer blinded as to the study group. Spinal cord segments were obtained for histopathologic examination. MEASUREMENTS AND MAIN RESULTS: Distal perfusion pressure and spinal cord perfusion pressure were significantly higher in the isoflurane group (p < .005). At 24 hours, seven of eight dogs in group 1 had severe neurologic injury (ie, paraplegia), with the eight having mild neurologic injury. This is in contrast to group 2, where 6 of 8 dogs had either minimal or no injury, one had mild injury, and one had severe injury. Similar results were observed at 48 hours (p < .005). CONCLUSIONS: Isoflurane, when used to control proximal hypertension during TACC, produces a higher spinal cord perfusion pressure and is associated with a lower incidence of neurologic injury than nitroprusside in this canine model.
Authors:
J I Simpson; T R Eide; G A Schiff; J F Clagnaz; Z Zisbrod; S B Newman; I Hossain
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cardiothoracic and vascular anesthesia     Volume:  9     ISSN:  1053-0770     ISO Abbreviation:  J. Cardiothorac. Vasc. Anesth.     Publication Date:  1995 Oct 
Date Detail:
Created Date:  1996-02-22     Completed Date:  1996-02-22     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9110208     Medline TA:  J Cardiothorac Vasc Anesth     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  491-6     Citation Subset:  IM    
Affiliation:
Department of Anesthesiology, Long Island Jewish Medical Center, New Hyde Park, NY 11042, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Antihypertensive Agents / pharmacology*,  therapeutic use
Aorta, Thoracic / surgery*
Constriction
Dogs
Hemodynamics / drug effects
Hypertension / drug therapy*
Ischemia / drug therapy*,  pathology
Isoflurane / pharmacology*,  therapeutic use
Nitroprusside / pharmacology*,  therapeutic use
Paraplegia / prevention & control
Prospective Studies
Random Allocation
Spinal Cord / blood supply*,  pathology
Chemical
Reg. No./Substance:
0/Antihypertensive Agents; 15078-28-1/Nitroprusside; 26675-46-7/Isoflurane

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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