the aim of the analgesic technique was to relieve pain during the first stage of labour by blocking the sensory nerve fibres at the spinal level of t 10 to t12 , with either 0-5 per cent bupivacaine or bupivacaine with adrenaline 1 : 200 000 , the dose varying from 10 to 25 mg .
C0030193
pain
C0006400
bupivacaine