Format

Send to

Choose Destination
Br J Anaesth. 2002 Mar;88(3):357-61.

Cerebrovascular carbon dioxide reactivity in children anaesthetized with sevoflurane.

Author information

1
Department of Anaesthesia, The Hospital for Sick Children, University of Toronto, Ontario, Canada,.

Abstract

BACKGROUND:

To determine the effects of sevoflurane on cerebrovascular carbon dioxide reactivity (CCO2R), middle cerebral artery blood flow velocity (CBFV) was measured at different levels of PE'CO2 by transcranial Doppler sonography in 16 ASA I or II children, aged 18 months to 7 yr undergoing elective urological surgery.

METHODS:

Anaesthesia comprised 1.0 MAC sevoflurane and air in 30% oxygen delivered through an Ayre's T piece by intermittent positive-pressure ventilation, and a caudal epidural block with 0.25% bupivacaine 1.0 ml kg(-1) without epinephrine. PE'CO2 was randomly adjusted to 25, 35, 45 and 55 mm Hg (3.3, 4.6, 5.9 and 7.2 kPa) with an exogenous source of CO2, while maintaining ventilation variables constant.

RESULTS:

CBFV increased as PE'CO2 increased from 25 to 35, and to 45 mm Hg (P<0.001), but did not increase significantly with an increase in PE'CO2 from 45 to 55 mm Hg. Mean heart rate and arterial pressure remained constant.

CONCLUSION:

CCO2R is preserved in healthy children anaesthetized with 1.0 MAC sevoflurane.

PMID:
11990266
DOI:
10.1093/bja/88.3.357
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center