COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

A randomized trial of crystalloid versus colloid solution for prevention of hypotension during spinal or low-dose combined spinal-epidural anesthesia for elective cesarean delivery

J-S Ko, C-S Kim, H-S Cho, D-H Choi
International Journal of Obstetric Anesthesia 2007, 16 (1): 8-12
17125995

BACKGROUND: Spinal anesthesia for cesarean delivery is commonly associated with hypotension and nausea and vomiting, and preload with crystalloid or colloid solution is widely recommended. Low-dose spinal via the combined spinal-epidural technique appears to cause less hypotension and nausea and vomiting. The aim of this study was to investigate whether the combined use of colloid preload and combined spinal-epidural technique might further reduce the rates of these symptoms.

METHODS: Women undergoing elective cesarean delivery were randomly allocated to one of four groups (50 in each) to receive crystalloid preload before spinal anesthesia, colloid preload before spinal anesthesia, crystalloid preload before combined spinal-epidural anesthesia, and colloid preload before combined spinal-epidural anesthesia. The incidences of hypotension and nausea and vomiting were compared. Spinal anesthesia was performed with 0.5% hyperbaric bupivacaine 9 mg and fentanyl 20 microg, and combined spinal-epidural anesthesia with 0.5% hyperbaric bupivacaine 6 mg + fentanyl 20 microg followed by epidural injection of 0.25% bupivacaine 10 mL.

RESULTS: The frequencies of hypotension were 44%, 18%, 24%, and 20% in crystalloid preload-spinal anesthesia, colloid preload-spinal anesthesia, crystalloid preload-combined spinal epidural anesthesia, and colloid preload-combined spinal epidural anesthesia groups, respectively. The frequencies of nausea and vomiting were 20%, 2%, 8%, and 4% in respective groups.

CONCLUSION: Colloid preload and low-dose spinal anesthesia alone or in combination lowered the incidences of hypotension and nausea. However, the combination of two methods failed to demonstrate further decreases in the incidence of the symptoms compared to the colloid-spinal anesthesia or crystalloid-combined spinal-epidural anesthesia groups.

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