Motorcycle riders' perception of helmet use: complaints and dissatisfaction.

In accidents which involve two-wheeled vehicles the helmet plays a life-saving role, but very little is known about the motorcycle rider's perception of the helmet. We evaluated the relationships between having been involved in an accident and dissatisfaction with the helmet, and between the perception of motorcycle riders and the objective features of the helmet. This was a case-control study: riders of motorized two-wheelers who had been involved in accidents (accident cases) were compared against a similarly interviewed sample of riders that had not been in accidents (control cases).

Effectiveness and safety of a management protocol to correct over-anticoagulation with oral vitamin K: a retrospective study of 1,043 cases.

Background: Timely reversal of excessive anticoagulation is important in preventing bleeding complications. The use of vitamin K in correcting over-anticoagulation is widely accepted to be superior to discontinuation of therapy but its effectiveness and safety in large scale cohort studies has not been assessed.

Methods: According to our protocol, 2 mg of oral vitamin K in addition to omitting the day's dose of warfarin, were administered to all patients presenting INR levels >or=5.