BJA Advance Access originally published online on May 13, 2005
British Journal of Anaesthesia 2005 95(2):222-225; doi:10.1093/bja/aei156
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PAEDIATRIC ANAESTHESIA |
Propofol injection pain in children: a prospective randomized double-blind trial of a new propofol formulation versus propofol with added lidocaine
1 Department of Paediatric Anaesthesia and Intensive Care, Astrid Lindgrens Children's Hospital, 2 Karolinska Pharmacy, Karolinska University Hospital and Childhood Cancer Research Unit and 3 Department of Woman and Child Health, Karolinska Institutet, Stockholm, Sweden
* Corresponding author. Department of Anaesthesia and Intensive Care, Astrid Lindgrens Childrens Hospital/Karolinska University Hospital, SE-171 76 Stockholm, Sweden. E-mail: yvonne.nyman{at}karolinska.se
Background. The incidence of pain on injection of propofol remains unacceptably high in children, despite various strategies to reduce it. A new drug formulation of propofol has, in adult studies, been reported to cause less injection pain compared with other propofol solutions. The aim of the present prospective randomized double-blind clinical trial was to compare the incidence of pain-free injection following the use of this new formulation with that following the use of propofol with added lidocaine in children undergoing day case surgery.
Methods. Eighty-three children (age range 218 yr) were randomized to receive 3 mg kg1 of either Propofol-Lipuro® (propofol dissolved in a mixture of medium- and long-chain triglycerides [MCTLCT]; group pL, n=42) or Diprivan® (propofol dissolved in long-chain triglycerides [LCT]) with added lidocaine (0.3 mg kg1) (group pD, n=41). A specially trained nurse anaesthetist assessed the occurrence of injection pain using a four-graded pain scale.
Results. Significantly fewer patients had an entirely pain-free propofol injection in group pL (33.3%) than in group pD (61.0%) (P=0.016).
Conclusions. A new MCTLCT propofol formulation as a plain solution was associated with a higher incidence of injection pain than LCT propofol with added lidocaine when used for induction of anaesthesia in children.
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