Certified Hyperbaric Technologist Practice Test 2026 – Comprehensive Exam Prep

The reason Phenergan is unlikely to affect Transcutaneous Oxygen Measurement (TcOM) values is due to its mechanism of action and pharmacological profile. Phenergan, also known as promethazine, is primarily an antihistamine used to treat allergies, nausea, and motion sickness. It does not have a direct impact on oxygen transport or utilization in the body.

In contrast, antibiotics, anti-inflammatory medications, and oxygen supplements each have implications for oxygen levels or blood flow dynamics. Antibiotics can potentially influence infections that affect tissue oxygenation. Anti-inflammatory medications may alter the inflammatory response, which can also affect blood flow and, consequently, oxygen delivery to tissues. Oxygen supplements, as the name suggests, directly increase the levels of oxygen available in the bloodstream, significantly impacting TcOM measurements.

Therefore, the pharmacological effects and mechanisms of Phenergan set it apart from the other options in terms of its influence on oxygen values measured through TcOM.