DHA Study Guide 2026

Lead aprons are designed to attenuate scattered X-rays that reach personnel outside the primary beam, reducing gonadal and abdominal dose during fluoroscopic procedures.

Antimicrobial stewardship programs aim to optimize antimicrobial therapy: ensuring patients receive the right antibiotic, at the right dose, via the right route, for the right duration. This reduces selective pressure driving resistance, minimizes adverse effects (C. diff, renal toxicity), and reduces costs without compromising patient outcomes.

Patient confidentiality may be broken without consent when: (1) legally required (mandatory reportable diseases, court orders, child protection laws), (2) serious and imminent harm to an identifiable third party exists that cannot be prevented otherwise, or (3) the patient lacks capacity and disclosure is in their best interest.

Triage in EMS is a critical process used to quickly assess patients and prioritize their care based on the severity of their condition and the likelihood of survival. In situations with multiple casualties or limited resources, triage ensures that those with the most life-threatening injuries or illnesses receive immediate attention, maximizing the overall number of lives saved. It's about making efficient and ethical decisions under pressure.

The DHA has a robust enforcement mechanism to address violations of its regulations. Depending on the severity of the infraction, healthcare professionals may face a range of disciplinary actions, including fines, temporary suspension of their license, or even permanent revocation. This ensures accountability and protects public safety by removing incompetent or unethical practitioners.

Primary hypothyroidism (high TSH, low free T4) is treated with levothyroxine (synthetic T4). T4 is converted to active T3 peripherally. Levothyroxine has a long half-life (~7 days) allowing once-daily dosing.