['Authority-based' versus 'evidence-based' blood pressure measurements in pregnancy]

Recent evidence suggests that the fifth Korotkoff sound (K5) is a much more reliable point of measurement to determine diastolic blood pressure in pregnant women than the fourth one (K4). The guidelines for obstetricians and midwives should be corrected without delay to reflect this new knowledge. In non-pregnant people K5 already is the point of reference.