Out-of-hospital cardiac arrest in denver, colorado: epidemiology and outcomes.

Objectives: The annual incidence of out-of-hospital cardiac arrest (OOHCA) in the United States is approximately 6 per 10,000 population and survival remains low. Relatively little is known about the performance characteristics of a two-tiered emergency medical services (EMS) system split between fire-based basic life support (BLS) dispersed from fixed locations and hospital-based advanced life support (ALS) dispersed from nonfixed locations. The objectives of this study were to describe the incidence of OOHCA in Denver, Colorado, and to define the prevalence of survival with good neurologic function in the context of this particular EMS system.

Lack of standardization in performance of the semen analysis among laboratories in the United States.

Objective: To determine the level of standardization in performance of the semen analysis among clinical laboratories in the United States.

Design: A survey was mailed to laboratories requesting information about the laboratory and performance of the semen analysis. Responses were received from 536 laboratories.