Do more paramedics lead to better outcomes? Generally speaking, we think that more is better. But that may not be the case.

Hagiwara, et al performed a prospective, observational study on patients experiencing put of hospital cardiac arrest. The study included 67 emergency hospitals, of which 36 were academic centers. The study enrolled more than 16,000 people, and the data set included 4448 patients, split into two groups. One group included one EMT in the ambulance during transfer. The second group included two or more EMTs. The patients that were excluded  may be an important variable, as those in need of IV therapy or advanced airway management were excluded from the data.

When the data was finally gathered and analyzed, it was found that there was no significant difference in ROSC or in survival to hospital discharge between the two groups.

Advanced life support in Japan works slightly differently than it does in the United States. Providers that would be the equivalent to an EMT-I in the United States often attend to patients. Paramedics tend to patients, but are often reserved for more acutely ill patients.

The data for the presenting rhythms of the arrest are consistent with most national data in the United States. Specifically, approximately 9% of OHCA patients presented to EMS in VF.