A model for the distribution of daily number of births in obstetric clinics based on a descriptive retrospective study.

Objective: To test whether the relatively unpredictable nature of labour onset can be described by the Poisson distribution.

Design: A descriptive retrospective study.

Setting: From the Danish Birth Registry, we identified births from all seven obstetric clinics in the capital region of Denmark (n=211 290) between 2000 and the end of 2009.

Maintained cerebral metabolic ratio during exercise in patients with beta-adrenergic blockade.

Background: Decreased cerebral metabolic ratio (CMR) [molar uptake of O(2) versus molar uptake of (glucose + (1/2) lactate)] during exercise is attenuated by intravenous administration of the non-selective beta-adrenergic receptor antagonist propranolol. We evaluated to what extent cirrhotic patients in oral treatment with propranolol are able to mobilize brain non-oxidative carbohydrate metabolism.

Methods: Incremental cycle ergometry to exhaustion (86 +/- 4.