Compared with general anaesthesia , a central neuraxial block may reduce the zero to 30-day mortality for patients undergoing surgery with intermediate to high cardiac risk ( level of evidence , moderate ) .
BACKGROUND Various beneficial effects derived from neuraxial blocks have been reported .
However , it is unclear whether these effects have an influence on perioperative mortality and major pulmonary/cardiovascular complications .
OBJECTIVES Our primary objective was to summarize Cochrane systematic review s that assess the effects of neuraxial blockade on perioperative rates of death , chest infection and myocardial infa rct ion by integrating the evidence from all such review s that have compared neuraxial blockade with or without general anaesthesia versus general anaesthesia alone for different types of surgery in various population s. Our secondary objective was to summarize the evidence on adverse effects ( an adverse event for which a causal relation between the intervention and the event is at least a reasonable possibility ) of neuraxial blockade .
Prospective, Randomized Trial Comparing General with Spinal Anesthesia for Cesarean Delivery in Preeclamptic Patients with a Nonreassuring Fetal Heart Trace
Background There are no r and omized studies on neonatal outcome after spinal versus general anesthesia for cesarean delivery in preeclamptic patients with a nonreassuring fetal heart trace . This study examined both markers of neonatal hypoxia and maternal hemodynamics . Methods Seventy patients were r and omized to general ( n = 35 ) or spinal anesthesia ( n = 35 ) . The general anesthesia group received thiopentone , magnesium sulfate , and suxamethonium intravenously before intubation , followed by 50 % nitrous oxide in oxygen , 0.75–1.5 % isoflurane , and morphine after delivery . The target end-tidal partial pressure of carbon dioxide ( Pco2 ) was 30–34 mmHg . The spinal anesthesia group received 1.8 ml hyperbaric bupivacaine plus 10 & mgr;g fentanyl at the L3–L4 interspace . Heart rate and blood pressure were measured at specific time points . Hypotension was treated with ephedrine .  Maternal arterial and neonatal umbilical arterial blood gas sample s were taken at delivery . Resuscitation requirements were recorded . Results In both groups , hemodynamic measures remained within acceptable limits . Spinal anesthesia patients required more ephedrine ( 13.7 vs. 2.7 mg ) . Maternal Paco2 was lower in the spinal group ( 28.9 vs. 32.4 mmHg ) . One-minute Apgar scores were lower after general anesthesia . Base deficit was greater ( 7.13 vs. 4.68 mEq/l ) and neonatal umbilical arterial pH was lower ( 7.20 vs. 7.23 ) after spinal anesthesia . Post hoc analysis showed that if maternal diastolic blood pressure on admission was greater than 110 mmHg , neonatal umbilical arterial base deficit was greater after spinal anesthesia . There was no difference in the number of patients with Apgar scores less than 7 at 1 or 5 min or umbilical arterial pH less than 7.2 or in the requirements for resuscitation . Conclusions In preeclamptic patients with a nonreassuring fetal heart trace , spinal anesthesia for cesarean delivery was associated with a greater mean neonatal umbilical arterial base deficit and a lower median umbilical arterial pH. The clinical significance remains to be established . Maternal hemodynamics were similar and acceptable with either anesthetic technique
Compared with general anaesthesia , a central neuraxial block may reduce the zero to 30-day mortality for patients undergoing surgery with intermediate to high cardiac risk ( level of evidence , moderate ) .
BACKGROUND Various beneficial effects derived from neuraxial blocks have been reported .
However , it is unclear whether these effects have an influence on perioperative mortality and major pulmonary/cardiovascular complications .
OBJECTIVES Our primary objective was to summarize Cochrane systematic review s that assess the effects of neuraxial blockade on perioperative rates of death , chest infection and myocardial infa rct ion by integrating the evidence from all such review s that have compared neuraxial blockade with or without general anaesthesia versus general anaesthesia alone for different types of surgery in various population s. Our secondary objective was to summarize the evidence on adverse effects ( an adverse event for which a causal relation between the intervention and the event is at least a reasonable possibility ) of neuraxial blockade .