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 .
Comparison of ethyl chloride spray with topical anaesthetic in children experiencing venepuncture.
AIM Initial validation of ethyl chloride spray in minimising pain for children experiencing venepuncture in comparison to Ametop cream . DESIGN A r and omised non-inferiority cross-over trial comparing ethyl chloride with Ametop in 77 children aged five to 13 years undergoing measurement of glomerular filtration rate .  Additional data were gathered on the child 's preferred choice for the third venepuncture . RESULTS Ethyl chloride spray is of equal preference to Ametop in children experiencing venepuncture , with lower self-reported pain score . It should be considered as an added alternative option to topical anaesthetic but further work is needed to clarify application technique
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 .