Real Exam-Style Step-by-Step Station Practice
Use this exact sequence in most NAC OSCE stations. The examiner is assessing whether you can recognize urgent conditions, ask focused questions, prioritize investigations, and choose the safest next step.
Read the task carefully. Identify whether it is history, counseling, physical exam, diagnosis, or management.
Introduce yourself, confirm identity, obtain consent, and begin with an open-ended question.
Ask focused history using red flags and dangerous differential diagnoses.
Verbalize focused physical examination and vital signs.
Give a prioritized differential diagnosis: most likely plus must-not-miss conditions.
Select initial investigations. Choose tests that change immediate management.
State the best next step. Stabilization and safety usually come before definitive diagnosis.
Counsel clearly, check understanding, and provide safety-net instructions.
Do not choose the most advanced test automatically. Choose the safest next action based on stability, red flags, and urgency.
Exam rule: unstable patient → ABCs and urgent management first. Stable patient → focused assessment and targeted investigation.
You are seeing a 58-year-old man in the emergency department with chest discomfort for 45 minutes. Take a focused history, state your differential diagnosis, and explain your initial management plan.
“Doctor, it is probably indigestion. I feel pressure in my chest and I am sweating a bit.”
Most likely diagnosis: Acute coronary syndrome until proven otherwise.
Best next step: Immediate ECG, vital sign assessment, cardiac monitoring, IV access, troponin testing, and urgent ACS management according to findings.
Safe wording: “Although this may feel like indigestion, your symptoms can also represent a heart-related emergency. I would like to assess this urgently with an ECG and blood tests while monitoring you closely.”
A 42-year-old woman presents with a severe headache. Take a focused history and discuss your differential diagnosis and initial investigation plan.
“I get headaches sometimes, but this one became very intense very quickly.”
Must-not-miss diagnosis: Subarachnoid hemorrhage if sudden maximal-onset severe headache.
Best next step: Urgent assessment of stability, focused neurological examination, and non-contrast CT head. If meningitis features are present, urgent sepsis/meningitis management is required.
Safe wording: “Because this headache became intense very quickly, we must urgently rule out bleeding around the brain and other serious causes.”
A 29-year-old woman presents with lower abdominal pain and vaginal bleeding. Take a focused history and explain your initial approach.
“I am about seven weeks pregnant. I noticed bleeding this morning and now I have pain on one side.”
Must-not-miss diagnosis: Ectopic pregnancy.
Best next step: Assess hemodynamic stability, obtain urgent beta-hCG and transvaginal ultrasound, check CBC and blood group/Rh, and involve OB/GYN urgently if unstable or ectopic pregnancy is suspected.
Safe wording: “Bleeding in early pregnancy can have several causes, but because you have one-sided pain, we must urgently rule out an ectopic pregnancy.”
| Domain | Expected Performance |
|---|---|
| Opening | Introduces self, confirms identity, obtains consent, uses open-ended question. |
| Clinical Reasoning | Identifies most likely diagnosis and dangerous alternatives. |
| Red Flags | Actively screens for instability, severe symptoms, neurologic deficits, pregnancy risk, sepsis, or bleeding. |
| Investigations | Selects urgent, focused tests that change management. |
| Best Next Step | Prioritizes stabilization, urgent assessment, and safe disposition. |
| Communication | Explains concern clearly, uses empathy, avoids unnecessary reassurance. |
| Closure | Summarizes plan, checks understanding, gives safety-net instructions. |
Stability → Red Flags → Focused History → Focused Exam → Dangerous Differential → Initial Investigations → Best Next Step → Counseling → Safety-Net.