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[Effect of continuous extradural infusion of bupivacaine on diaphragmatic function after upper abdominal surgery]
Tomohiro Kiya1, Naoyuki Fujimura, Mioko Okanuma
1Department of Anesthesiology, Sapporo Medical University, School of Medicine, Sapporo 060-8543.
Background:
Diaphragmatic function is impaired after abdominal surgery. We investigated the effect of continuous extradural infusion of bupivacaine on diaphragmatic function after upper abdominal surgery using respiratory inductive plethysmography (RIP).
Methods:
Ten healthy patients for upper abdominal surgery were divided into two groups; the first group of patients with continuous extradural infusion of morphine (group 1) and the second group of patients with continuous extradural infusion of morphine and bupivacaine (group 2).
Results:
On the first day after surgery, there was no significant difference between the visual analogue scale scores in the two groups. Abdominal contribution to tidal volume (VAB/VT) in group 1 was significantly decreased compared to that of the pre-operative value. VAB/VT in group 2 was significantly higher than that in group 1.
Conclusions:
Continuous extradural infusion of bupivacaine improves diaphragmatic function after upper abdominal surgery.