OSCE Checklist: IV Cannula Insertion 🩸 A Step-by-Step Guide for MBBS Students Aligning with the CBME
Why This OSCE Station Matters
Intravenous (IV) cannulation is one of the core procedural competencies every MBBS student must master. Under the new CBME pattern by the National Medical Commission (NMC), students are expected to demonstrate both knowledge and skill at the bedside. This OSCE station tests your procedural accuracy, aseptic technique, patient communication, and complication management — all in one go.
How to practice this OSCE?
You Can practice IV cannulation on a pillow or cushion, you have to practice like you are doing in real doing verbal commands also. If you have someone to observe like your friend who observes you and ticks each item which you complete and leave the item blank which you didn’t complete. At the end ,score is calculated automatically and he can give you feedback what you did well and which items were missed. after multiple practice you will master the Competency.
If you are alone, Still you can practice by switching on your mobile camera then practice and record the session. after completion of session ,you can review your performance by marking ticks on checklist and assess your performance from checklist
🩸 IV Cannula Insertion — OSCE Checklist
Common Mistakes Students Make (Avoid These!)
Mistake | Why It Costs Marks |
❌ Not checking allergies | Breaks basic safety protocol |
❌ Recapping the needle | Major sharps injury risk — immediate fail in many OSCEs |
❌ Re-palpating the vein after cleaning | Breaks asepsis |
❌ Advancing the needle too far without reducing angle | Can puncture the posterior vein wall |
❌ Foregetting to release tourniquet before flush | Causes bleeding around site, haematoma |
❌ Not aspirating before flushing | Could be in artery (pale skin, pulsatile flow) if accidental arterial puncture |
❌ No documentation | Procedural closure incomplete |
Examiner’s Pearls — What They’re Really Looking For
- Aseptic discipline— It’s not enough to just clean; they want to see you respect the sterile field.
- Patient communication— A calm, informed patient is less likely to move during the procedure. The examiner observes consent, explanation, and reassurance.
- Needle safety— Zero-tolerance for unsafe disposal.
- Cannula gauge rationale— “Why 20G?” — “Because this patient is an adult undergoing surgery and may receive blood products or rapid fluids.”
- Troubleshooting— If no flashback: verbalise what you would do (tourniquet still tight? vein collapsed? angle too shallow?)
Quick Mnemonic — “IV CANNULA”
Letter | Meaning |
I | Introduce yourself |
V | Vein — select and palpate |
C | Consent & check allergies |
A | Asepsis — clean properly |
N | Needle — insert bevel up, 15–30° |
N | No recapping! |
U | Undo tourniquet |
L | Lock — flush and secure |
A | Aftercare — thank, document |