Thoughts on safety of in office nitrous oxide?

Surgeon popping by to ask a question. I’m considering joining a practice that performs some in office procedures (vasectomies, prostate biopsies, etc) using a patient administered 50% nitrous/50% O2 system. I know similar things have been used in dentists offices forever, but lacking anesthesia training this made me a bit uneasy. Assuming adequate knowledge of contraindications to nitrous, any thoughts on the safety of in office nitrous use?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Anesthesiology Source Type: forums