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Does midline shift predict postoperative nausea in brain tumor patients undergoing awake craniotomy? A retrospective analysis.

Abstract：

BACKGROUND:The presence of midline shift on neuroradiologic studies in brain tumor patients represents mass effect from the tumor and surrounding edema. We hypothesized that baseline cerebral edema as measured by midline shift would increase postoperative nausea (PON). We studied the incidence of PON in brain tumor patients, with and without midline shift on preoperative magnetic resonance (MRI) or computed tomographic (CT) imaging, undergoing awake craniotomy. METHODS:After IRB approval, we retrospectively extracted data from perioperative records between January 2005 and December 2010. Post-craniotomy nausea and pain scores were collected. Intraoperative anti-emetic, anesthetic, and analgesic regimens were assessed. Both the rescue anti-emetic and cumulative postoperative analgesic requirements were collected up to 12 hours postoperatively. The amount of midline shift on preoperative neuroimaging was gathered from radiology reports. Univariate comparisons between groups (no midline shift vs. midline shift) were made with t-tests for continuous variables, and chi-square tests for categorical variables. A multivariable analysis was performed to identify predictors of postoperative nausea. Limitations of this study include the retrospective design and the inability to gather accurate data regarding vomiting from the medical record. RESULTS:Data from 386 patients were available for analysis. Patients were divided into two groups: no midline shift (n = 283) and midline shift (n = 103). The mean midline shift distance was 5.96 mm (95% CI [5.32, 6.59]). There was no difference in the incidence of nausea or pain scores between the two groups. More malignant brain tumor patients were in the midline shift group, as determined by the postoperative histopathological diagnosis (P < 0.05). Patients in the midline shift group also had longer anesthesia and surgical times (P < 0.05). CONCLUSION:In patients undergoing a standardized anesthetic for awake craniotomy for tumor resection, the presence of preoperative midline shift did not correlate with postoperative nausea.

journal_name

Curr Med Res Opin

journal_title

Current medical research and opinion

authors

Ouyang MW,McDonagh DL,Phillips-Bute B,James ML,Friedman AH,Gan TJ

doi

10.1185/03007995.2013.811071

subject

Has Abstract

pub_date

2013-09-01 00:00:00

pages

1033-8

issue

eissn

0300-7995

issn

1473-4877

journal_volume

pub_type

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Does midline shift predict postoperative nausea in brain tumor patients undergoing awake craniotomy? A retrospective analysis.