JOURNAL OF SHANDONG UNIVERSITY (OTOLARYNGOLOGY AND OPHTHALMOLOGY)

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Effects of controlled hypotension at different levels on definition of surgical field and cerebral blood flow

WANG Zong-feng1, ZHANG Zhi-li1，　LI Jian-dong1, LI Jian-ge2   

  1. 1. Department of Otorhinolaryngology; 2. Department of Ultrasound, Dongying People′s Hospital, Dongying 257091, Shandong, China
  • Received:2008-01-11 Revised:2008-04-29 Online:2008-06-16 Published:2008-06-16
  • Contact: WANG Zong-feng

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Abstract: To explore the effects of deliberate hypotension at different levels on cerebral blood flow and definition of surgical fields. Methods240 ASA Grade patients were randomly divided into four groups( 60 in each group ): group 1 whose mean arterial pressure(MAP) was 64% of the former, group 2 whose MAP was 70% of the former, group 3 whose MAP was 80% of the former and the control group. Cerebral blood flow during hypotension was determined by transcranial Doppler ultrasonography, meanwhile surgical field quality (SSFQ) scores were assessed based on the Fromme surgical field quality list. ResultHypotesion caused a light decrease in cerebral blood flow velocity (CBFV) but was not significantly different either among three groups or during the procedure. Conclusion64% MAP maintained for 1 hour has no significant effect on cerebral blood flow but gives the best definition of the surgical field.

Key words: controlled, Hemodynamics, Hypotension, Endoscopy

CLC Number: 

  • R765.39
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