All 4 faces pain scales were found to be adequately supported by psychometric data .
When given a choice between faces scales , children preferred the WBFPRS .
Confounding of pain intensity with affect caused by use of smiling and crying anchor faces is a disadvantage of the WBFPRS .
: For clinical use , we found no grounds to switch from 1 faces scale to another when 1 of the scales is in use .
CONTEXT : Numerous faces scales have been developed for the measurement of  pain intensity in children .
It remains unclear whether any one of the faces scales is better for a particular purpose with regard to validity , reliability , feasibility , and preference .
OBJECTIVES : To summarize and systematic ally review faces pain scales most commonly used to obtain self-report of pain intensity in children for evaluation of reliability and validity and to compare the scales for preference and utility .
Adjuvant local anaesthetics in the epipharyngeal space in day-case adenoidectomy: A prospective, randomized, double-blind, placebo-controlled trial
Conclusion . Mepivacaine applied in the epipharyngeal space as an adjuvant local anaesthetic does not reduce postoperative pain after adenoidectomy in children given high-dose paracetamol preoperatively . Objective . To evaluate the pain-reducing effect of an adjuvant local anaesthetic ( mepivacaine ) applied in the epipharyngeal space after outpatient adenoidectomy . Material and methods . This was a prospect i ve , r and omized , double-blind , placebo-controlled trial . Postoperative pain was assessed in 98 children aged 3–10 years using a  visual analogue scale ( VAS ) and the Wong – Baker FACES pain rating scale . The time between the end of surgery and discharge from hospital was recorded , as well as the need for extra pain medication in addition to the high-dose paracetamol ( acetaminophen ) that had been given preoperatively . Serum levels of mepivacaine  were analysed in 10 consecutive patients . Results . No difference was seen between the mepivacaine and control groups regarding postoperative pain as estimated using either the VAS or the Wong – Baker FACES pain rating scale . There were also no differences between the groups concerning the time to discharge from hospital and the need for extra pain medication before discharge . No mepivacaine  could be detected in the patients ’ sera
All 4 faces pain scales were found to be adequately supported by psychometric data .
When given a choice between faces scales , children preferred the WBFPRS .
Confounding of pain intensity with affect caused by use of smiling and crying anchor faces is a disadvantage of the WBFPRS .
: For clinical use , we found no grounds to switch from 1 faces scale to another when 1 of the scales is in use .
CONTEXT : Numerous faces scales have been developed for the measurement of  pain intensity in children .
It remains unclear whether any one of the faces scales is better for a particular purpose with regard to validity , reliability , feasibility , and preference .
OBJECTIVES : To summarize and systematic ally review faces pain scales most commonly used to obtain self-report of pain intensity in children for evaluation of reliability and validity and to compare the scales for preference and utility .