Are volunteers ethically allowed to do this?

I volunteer at a free medical clinic for low income and uninsured individuals. My position is in the back office, where we call patients in from the waiting room to interview them and record basic vitals in their chart before they see the doctor. I ask the patient's birthdate to confirm, then take height, weight, blood pressure (automatic), temperature, and record respiratory rate. On rarer occasions I do finger pricks to test blood sugar for diabetic patients, or ask female OBGYN patients a... Are volunteers ethically allowed to do this?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical - MD Source Type: forums