The administration of 50/50 nitrous oxide/oxygen to infants and young children is effective in decreasing the pain associated with palivizumab intramuscular injections. The combined nitrous oxide/oxygen plus EMLA cream was more effective than either EMLA cream or nitrous oxide/oxygen alone.

Few observational scales are available for assessing chronic or recurrent pain in children with cancer because overt behavioral signs of chronic pain dissipate as time passes, making them difficult to detect reliably. The Douleur Enfant Gustave Roussy (DEGR) scale developed by Gauvain-Piquard to monitor prolonged pain in children with cancer aged 2-6 years is currently the only validated tool available for this purpose, but is time consuming and difficult to use in daily clinical practice. To shorten composite measurement scales, we developed the Hétero Evaluation Douleur Enfant (HEDEN) scale from the DEGR scale. We present here the process and validation of this scale. Expert consensus was used for the elaboration of HEDEN: 5/10 DEGR items were chosen with three rating levels. Concurrent validity was tested in a first cohort with correlation analysis between HEDEN and DEGR. The HEDEN scale was then validated in a second cohort. In the first step, the study (59 children) showed acceptable correlation between DEGR and HEDEN (r = 0.5), with good reliability (α = 0.61), and interrater agreement (r = 0.62). Subsequent validation in 48 children showed a significant correlation between DEGR and HEDEN (r = 0.6). Reliability was good (α = 0.75), with excellent interrater agreement [r = 0.67 (95% CI: 0.48-0.79)]. On average, the evaluation took 23 minutes (SD = 10.4) for DEGR versus 4.42 minutes (SD = 5.9) for HEDEN. This study shows a good correlation between HEDEN and DEGR scales. HEDEN allows accurate assessment of prolonged pain in young children with cancer.

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