Correct Answer: D. Tubectomy (Female Sterlisation)
Tubectomy (tubal ligation) is the most commonly performed female sterilization procedure in India, accounting for >60% of all permanent contraceptive methods. The instrument shown is a Pomeroy's clamp or similar tubal occlusion device used during the procedure. The procedure involves identification of the fallopian tube, creation of a small loop, and ligation/division of the tube segment. In India, tubectomy is performed under NSV (National Sterilization Program) guidelines and is often done post-partum or interval (6 weeks post-delivery). The instrument's design—a specialized clamp with specific jaws for grasping and occluding tubular structures—is pathognomonic for tubal sterilization. The procedure is performed via a small suprapubic incision (minilaparotomy) or laparoscopically. According to DC Dutta's Textbook of Obstetrics, tubectomy remains the gold standard permanent contraception in India due to high efficacy (>99%), low cost, and minimal morbidity when performed by trained personnel. The specific instrumentation distinguishes it from other gynecological procedures.
Why the other options are wrong
A. Bone marrow biopsy set — Bone marrow biopsy uses a Jamshidi needle or Salah needle—a hollow needle with stylet designed for sternal or iliac crest puncture. The depicted instrument is a clamp/forceps designed for tubal manipulation, not bone marrow aspiration. This is a trap for students who confuse any medical clamp with hematology procedures. B. Punch Biopsy — Punch biopsy uses a circular cutting instrument (punch biopsy tool) for dermatological or mucosal sampling, creating a cylindrical tissue specimen. The instrument shown is designed for tubal occlusion and ligation, not tissue sampling. The mechanism (clamping vs. cutting) and anatomical target (fallopian tube vs. skin/mucosa) are entirely different. C. Trocar and cannula for laparoscopy — Trocar and cannula are sharp-tipped instruments used for creating pneumoperitoneum and establishing laparoscopic ports. While laparoscopic tubectomy uses trocars for access, the depicted instrument is the intracorporeal tubal clamp/ligature device used after trocar insertion, not the trocar itself. This confuses the access instrument with the operative instrument.
High-Yield Facts
- Tubectomy efficacy: >99% with failure rate <1 per 1000 women-years; most reliable permanent contraception in India.
- Pomeroy's technique: Most common method—tube is ligated in a loop and the apex is excised, leaving two ligated segments.
- Timing in India: Post-partum tubectomy (within 48 hours) is preferred; interval tubectomy done ≥6 weeks post-delivery per NRHM guidelines.
- Access routes: Minilaparotomy (most common in India due to cost), laparoscopy, or hysteroscopic methods; choice depends on timing and facility.
- Reversal failure: Tubectomy reversal has only 40–50% success rate; counsel for permanence before procedure per IAP guidelines.
Mnemonics
POMEROY for Tubectomy Steps Pull tube out → Occlude with clamp → Measure segment (5–10 cm) → Excise middle portion → Roy (ligate both ends) → Observe hemostasis → Yield permanent sterility. Use this to remember the classic Pomeroy technique during exams. STILE for Female Sterilization Methods Sterilization (Tubectomy) → Tubal ligation → Interval/Immediate → Laparoscopy/Laparotomy → Excision/Electrocautery. Helps differentiate tubectomy from other female contraceptive methods.
NBE Trap
NBE may pair the instrument image with laparoscopy (option C) to trap students who know laparoscopic tubectomy is common but confuse the access instrument (trocar) with the operative instrument (tubal clamp). The question tests recognition of the specific clamp used intracorporeally, not the entry device.
Clinical Pearl
In Indian government hospitals, post-partum tubectomy is incentivized under NRHM and is often the first permanent contraception offered to multiparous women. Recognition of tubal instruments is critical for OBG residents performing these high-volume procedures. A failed tubectomy (rare but catastrophic) requires medico-legal documentation and counseling on reversal options.
_Reference: DC Dutta's Textbook of Obstetrics (8th ed.), Ch. 28 (Contraception); IAP Guidelines on Permanent Methods of Contraception_