Epidural analgesia in early labour blocks the stress response but uterine contractions remain unchanged.

PURPOSE: To determine the effect of epidural analgesia on biochemical markers of stress, plasma oxytocin concentrations and frequency of uterine contractions during the first stage of labour. METHODS: Nine nulliparous women, in spontaneous labour, with a singleton fetus and cervical dilatation < or = 5 cm were enrolled. Epidural bupivacaine 0.25% (range 10-14 ml) was administered and bilateral sensory blockade to ice (T8-L4) achieved. Blood samples were collected before the epidermal block and every 10 min for one hour after the block was achieved for the measurement of plasma beta-endorphin, cortical, glucose, lactate and oxytocin concentrations. No exogenous oxytocin was given. Intensity of pain was assessed at the time of the blood sampling using a 10 cm visual analogue scale (VAS). The frequency of uterine contractions was recorded for 60 min before and after the epidural block. RESULTS: There was a decrease in plasma beta-endorphin and cortisol concentrations after epidural block (P < 0.01). There were no changes in plasma glucose and lactate concentrations. The mean VAS for pain decreased 10 min after epidural block was achieved and remained < 2 throughout the study period (P < 0.001). Mean plasma oxytocin concentrations did not change. The frequency of uterine contractions before and after the epidural block was similar. CONCLUSIONS: The metabolic stress response to the pain of labour was attenuated by epidural analgesia. In contrast, plasma oxytocin concentration and frequency of uterine contractions were unaffected by the attenuation of metabolic stress response.

Epidural analgesia for labour in a patient with Charcot-Marie-Tooth disease.

PURPOSE: We report a case of a parturient with peroneal muscular atrophy-Charcot-Marie-Tooth disease type 1 (CMT)-who received epidural analgesia for labour. The effects of pregnancy and labour on the course of CMT are reviewed, together with the current literature on the provision of epidural and general anaesthesia in this disease. CLINICAL FEATURES: A 26-yr-old primipara with CMT was provided with epidural analgesia for labour. She experienced good pain control and suffered no untoward neurological sequelae. CONCLUSION: Epidural analgesia, after thorough discussion with the patient, may be offered to parturients with CMT.

Cardiac arrest after Caesarean section under subarachnoid block.

Cardiac arrest occurred on arrival in the recovery room after emergency Caesarean section under subarachnoid block. The patient was resuscitated successfully and recovered with no adverse effects. The current literature is reviewed and the pathophysiological mechanisms involved in the aetiology of cardiac arrest under subarachnoid block are discussed. Early use of adrenaline to treat severe bradycardia or hypotension is recommended.