MinervaBMJ 2007; 335 doi: http://dx.doi.org/10.1136/bmj.39414.698785.471 (Published 06 December 2007) Cite this as: BMJ 2007;335:1218
A prospective, population based study assessed the predictability of three factors related to a first ever myocardial infarct—carotid intima media thickness, total plaque area, and plaque echogenicity—and followed up more than 6200 adults aged 25 to 84 for six years. It turns out that carotid plaque area is a stronger predictor of first-ever myocardial infarction than is intima media thickness and, overall, carotid atheroma is a stronger risk factor for myocardial infarction in women than in men (Stroke 2007;38:2873-80; doi: 10.1161/STROKEAHA.107.487264).
Visual estimates of blood loss are, surprisingly, usually underestimates rather than overestimates. A study that compared vaginal delivery drapes with and without volume calibrations at a simulated vaginal delivery showed that the calibrated drapes improved estimates of blood loss (300, 500, 1000, and 2000 ml) and the error was less than 15% at all volumes. With non-calibrated drapes, estimates were less accurate at the larger volumes, with a 16% error at 300 ml and 41% at 2000 …
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