DMT study guide
DMT · Work through your exam, one topic at a time.
The Certified Diver Medic (DMT) credential is one of three certification pathways offered by the National Board of Diving and Hyperbaric Medical Technology (NBDHMT), a non-profit certifying organization whose stated purpose is to define and promote the safe application of diving medicine and hyperbaric oxygen therapy. The Board describes itself as designed to meet the clinical, technical and safety needs of undersea and hyperbaric medicine, and it certifies Diver Medics (DMT), Hyperbaric Technologists (CHT) and Hyperbaric Nurses (CHRN). The DMT study guide has 4 sections and about 1,787 words.
01Diving Medicine: Pressure Physiology, Barotrauma and Decompression Illness
The Diving Medicine domain tests whether you can predict what pressure does to gas-containing spaces and to dissolved gas loads, then turn that prediction into a diagnosis and a first action. Stems are short vignettes: a diver surfaces with a symptom, and you must name the problem, start the right treatment, and decide whether recompression is urgent.
453 words, about 2 min02Hyperbaric Oxygen Therapy: Mechanisms, Indications and Dose
The HBO domain tests whether you can justify a treatment, choose a dose, and recognize that the dose is more than a pressure. Expect stems about indications, mechanism, table selection and complications.
441 words, about 2 min03Clinical and Technical Skills: Screening, Monitoring and In-Chamber Recognition
This domain tests the hands-on layer of practice: what you assess before pressurization, what you monitor at depth, how devices behave under pressure, and how fast you recognize a deteriorating patient inside the chamber. Otoscopy of both ears and a documented ability to equalize.
450 words, about 2 min04Safety, Codes and Standards: Fire Prevention, Equipment Rules and Regulation
This domain tests whether you know which standard governs what, and whether you can apply fire-safety and pressure-vessel rules under exam pressure. Stems often describe a violation or a near-miss and ask for the correct action.
443 words, about 2 min