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OG35.15,OG36.3 | Pap Smear and Cervical Punch Biopsy — SDL Guide (Part 3)
Self-Assessment
Use the following procedural skills checklist to evaluate your readiness for supervised clinical practice. This self-assessment tool maps the critical technical steps from each procedure — from speculum insertion through to specimen labelling — onto observable behaviours that your supervising clinician will assess in an OSCE or workplace-based assessment. Research in surgical education consistently demonstrates that self-assessment against explicit checklists accelerates skill acquisition more effectively than unstructured practice, because it promotes deliberate identification of gaps rather than reinforcing habitual errors. Work through each item honestly: mark items you can perform correctly and independently, note items you have rehearsed but feel uncertain about, and flag items you have not yet practised. Use the gaps to direct your next simulation session rather than waiting for an OSCE to reveal them.
Pap smear checklist:
- [ ] Correct speculum selection and insertion technique (no lubricant, correct rotation)
- [ ] Identifies the external os and transformation zone on inspection
- [ ] Ayre spatula tip placed correctly in os; full 360° rotation with maintained contact
- [ ] Cytobrush inserted to correct depth; rotated 90-180° only; rolled (not swept) onto slide
- [ ] Slide fixed within 15-30 seconds with correct fixation technique
- [ ] Slide labelled correctly; cytology form completed with LMP, clinical details
Punch biopsy checklist:
- [ ] Applies 3-5% acetic acid correctly; waits 60 seconds; identifies acetowhite change
- [ ] Tischler forceps correctly positioned perpendicular to lesion; brisk closure; slight rotation on withdrawal
- [ ] Biopsy specimen placed immediately in 10% formalin (NOT saline), individually labelled
- [ ] Achieves haemostasis with Monsel's or silver nitrate
- [ ] Recognises indications for endocervical curettage
- [ ] Counsels patient on post-procedure care and warning signs
Knowledge check questions:
1. Name the Bethesda categories that mandate immediate colposcopy referral (ASC-H, HSIL, AGC, AIS, carcinoma).
2. What is the difference between CIN 2 and CIN 3 on histology?
3. Why must biopsy specimens be placed in formalin and not saline?
4. When should ECC be added to punch biopsy in the colposcopy setting?
SELF-CHECK
After taking a Pap smear, the pathology report comes back as 'Unsatisfactory — air-drying artefact'. Which step in your technique was most likely at fault?
A. Using the Ayre spatula instead of a broom device
B. Taking too few rotations of the spatula on the ectocervix
C. Delaying spray fixation beyond 30 seconds after sampling
D. Using a medium speculum instead of a small one
Reveal Answer
Answer: C. Delaying spray fixation beyond 30 seconds after sampling
Air-drying artefact is the direct consequence of failing to fix the smear immediately after sampling. Once cells are exposed to air for more than 30 seconds, the water evaporates rapidly from the cytoplasm, causing nuclear swelling and chromatin smearing that mimics atypia or makes nuclear assessment impossible. The fix must be applied within 15-30 seconds. Spatula device choice (A) and rotation count (B) affect sample adequacy but do not cause air-drying artefact. Speculum size (D) affects patient comfort and visualisation, not cellular fixation.