Studying for Ventilators I (and the composite exam)

I completely forgot about all the stuff that we learned in the first part of Ventilators I. That's the part that has all of the so called "critical numbers" that I'm supposed to know like the back of my hand. The studying for that final is taking a really long time.

I'm starting to get concerned about having enough time to study for the composite exam. The composite exam will cover material covered in the program to date. In addition to studying for final exams, I also have to study first semester material. All I can do is keep studying and hope for the best.