Knowledge
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In Australia and New Zealand rocuronium is associated with a higher risk of anaphylaxis when compared to vecuronium or the benzylisoquinolinium NMBDs. This is not the case in North America or Europe.
pearl
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Carbetocin is a long-acting synthetic oxytocin analog. Although a 100 mcg dose is currently recommended, there is still some question as to the ideal dose. Dosing as low as 20 mcg may possibly be equally effective.
Carbetocin is currently only recommended for use during elective cesarean delivery, obviating the need for a post-operative oxytocin infusion currently practiced in many countries. In some countries it is also used after vaginal delivery.
It is at least as efficacious as intravenous oxytocin, and may possibly be superior at reducing postpartum haemorrhage.
Due to it's comparatively high cost compared with oxytocin however, the economic benefit of avoiding post-operative oxytocin infusions has not been demonstrated.
In the scenario of emergency cesarean section after labor augmentation with oxytocin, a much larger dose is likely required and carbetocin cannot be recommended.
One study has suggested a post-operative analgesic benefit of carbetocin vs oxytocin, although the evidence base for this is far from conclusive.
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There is some evidence supporting the benefit of perioperative intravenous lignocaine/lidocaine infusion in both laparoscopic and open abdominal surgery.
The strongest evidence supports both improved analgesia and reduction in nausea, with weaker evidence suggesting faster improvement in GIT function and earlier discharge from hospital.
Safety data is reassuring but far from conclusive due to the small size of most studies.
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Articles of interest relevant to labor epidural analgesia, both specifically focusing on obstetric epidurals and more peripherally relevant to obstetric labor analgesia.
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