BMJ 2007; 335 doi: https://doi.org/10.1136/bmj.39394.482025.471 (Published 15 November 2007) Cite this as: BMJ 2007;335:1052

Why do hip replacements need revision? Of 37 adults who underwent revision in one centre, the most common reasons were hip pain, decreased range of motion, and functional disability. All but one patient had radiographic evidence of femoro-acetabular impingement at the time of the revision, and after revision all patients regained some of their lost function within the first year (American Journal of Sports Medicine 2007;35:1918-21 doi: 10.1177/0363546507305097).

Reflux is a common diagnosis in infants—but is it being confused too often with ordinary regurgitation? Of 64 infants who were referred to a paediatric gastroenterology service in the United States, 44 underwent extended monitoring of oesophageal pH; 42 of them were already taking anti-reflux medication. The results showed abnormal acid reflux in eight infants, as well as four cases of hypertrophic pyloric stenosis and one case of renal tubular acidosis. In most of the babies with normal pH results, stopping the anti-reflux medication made no difference (Pediatrics 2007;120:946-9 doi: 10.1542/peds.2007-1146).

Farmers …

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