Obstetrics & Gynaecology · Labour Abnormalities, Induction and Operative Delivery

According to the ACOG classification of operative vaginal delivery, a 'low forceps' delivery is defined by the leading point of the fetal skull being at which station?

  • A At or below +2 cm, not on the pelvic floor
  • B At or below 0 station but above +2 cm
  • C Scalp visible at the introitus without separating the labia
  • D Any station below the ischial spines
Correct answer: A. At or below +2 cm, not on the pelvic floor

Explanation

Low forceps apply when the leading bony point of the skull is at station +2 cm or greater but the head is not yet on the pelvic floor, with rotation limited to less than 45 degrees. Option C describes outlet forceps, where the scalp is visible at the introitus, the skull has reached the pelvic floor, and rotation required is 45 degrees or less. Option B describes midforceps territory, which carries higher maternal and neonatal morbidity and requires experienced operators.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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