The church "St. Martins" located at 3480 Silver Spring Road is, actually, the United Armenian Congregational Church located at 3480 Cahuenga Blvd West, Los Angeles CA.
A "caloric" test is to determine if a temperature difference causes a hearing or balance problem and won Robert Bárány the Nobel Prize in 1914.
At least Seventeenth time Dispatcher is seen. This time two individuals are seen. One receiving & writing down this information & then handing it to the Dispatcher, who relays the information to the Squad. This procedure has been shown in the past, but is not typical when the Dispatcher is shown. This is probably regular procedure, but just not seen by the viewer.
A different camera angle is used when the ambulance & squad arrive at the hospital entrance with the fainting bride. Just as they pull in off the street, the Entrance sign with the hospital name can clearly be seen & read.