Question

You are going to collect blood cultures, PTT, and testosterone levels. In what order should the following collection tubes be used?

Answer 1

The blood cultures should be collected first, followed by the PTT, and finally the testosterone levels. Each collection requires different types of tubes and the process involves centrifuging to obtain plasma.

Step-by-step explanation:

1. First, collect the blood cultures. This involves collecting blood samples into tubes containing lithium heparin and centrifuging them to obtain plasma.
2. Next, collect the PTT. This also requires collecting blood samples, but this time into EDTA tubes and centrifuging them to obtain plasma.
3. Finally, collect the testosterone levels. This involves collecting blood samples into tubes containing K2EDTA and centrifuging them to obtain plasma.