BEST EVIDENCE TOPIC REPORTS Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary

the evidence pertaining to particular clinical questions. They are not systematic reviews, but rather contain the best (highest level) evidence that can be practically obtained by busy practising clinicians. The search strategies used to find the best evidence are reported in detail in order to allow clinicians to update searches whenever necessary. Five of the BETs published below were first reported at the Critical Appraisal Journal Club at the Manchester Royal Infirmary.1 Four guest BETs submitted from around the world are x Negative urine analysis to exclude uri-nary tract infection x Intramuscular piroxicam or intramuscu-lar diclofenac for renal colic x Oral (fast dissolving) piroxicam or intra-muscular diclofenac for renal colic x NIPPV for acute cardiogenic pulmonary oedema x Corticosteroids in the management of near-drowning Guest BETs x The Ottawa ankle rules in children x Belching as a symptom of myocardial ischaemia x Skull fracture and intracranial injury in children x Indication for head CT in children with mild head injury also shown. Each BET has been constructed in the four stages that have been described elsewhere.2 The BETs shown here together with those published previously and those cur-rently under construction can be seen a