Rand gets very anxious when he is in an enclosed space. every time he gets in an elevator, he thinks, âi will never get out of here alive.â his therapist rand by having him think instead, âthe doors of the elevator closed correctly and they will open correctly in just a minute.â his therapist is using

his therapist is using exposure therapy.
Exposure therapy is a psychotherapy that makes the patient exposed to the thing that they fear that used for patient with a phobia. It could be done by making patient simulating the condition or even looking at a photo. In this case, Rand is having a claustrophobia.

Plasma with a clotting factor removed.