Abstract
Study ObjectiveTo compare the effect of central neuraxial (spinal or epidural) anesthesia with general anesthesia on postoperative natural killer (NK) T lymphocyte function. DesignMeta-analysis. SettingUniversity-affiliated hospital. MeasurementsA systematic search of the medical literature from 1966 to 2009 yielded 5 eligible studies with a total of 184 patients who received neuraxial blockade. Natural killer T lymphocyte function was studied. Main ResultsThere was significant heterogeneity between the studies [I2 = 94.4% (95% CI= 90.3-96.2%)]. Overall fixed-effect odds ratio was 0.86 (0.66-1.14, P = 0.25). The random-effect odds ratio was 1.13 (0.26-4.92, P = 0.79). ConclusionAnesthetic technique does not appear to significantly affect postoperative NK T lymphocyte function. Given the heterogeneity observed, further clinical studies in cancer patients of the effect of anesthetic technique on immune function in general, and NK T lymphocyte function in particular, are needed.
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