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LA       local anaesthetic
FVC     forced vital capacity
FEV1    forced expiratory volume in 1 sec
PEFR   peak expiratory flow rate
PFR     peak flow rate
PEF     peak expiratory flow
PF       peak flow
FEF     forced expiratory flow
FEFR   forced expiratory flow rate
VC       vital capacity
PCA     patient-controlled analgesia
PCEA   patient-controlled epidural analgesia
PaO   partial pressure of arterial oxygen
PaCO partial pressure of arterial carbon dioxide
PRN      pro re nata (as needed)