## Partograph Interpretation: Alert Line Crossed with Slow Progress **Key Point:** The alert line on a WHO partograph is drawn at a rate of 1 cm/hour of cervical dilatation during active labour. Crossing the alert line — regardless of parity — signals that labour is progressing more slowly than expected and mandates heightened surveillance and, in most cases, augmentation with oxytocin (if no contraindication exists). ### Quantifying Labour Progress in This Case | Parameter | Admission | 6 Hours Later | Rate of Progress | |-----------|-----------|---------------|------------------| | Cervical dilatation | 3 cm | 5 cm | **0.33 cm/hour** | | Fetal head station | –1 | 0 | Descent occurring | | Contractions | 3–4 per 10 min, 50 sec | Assumed maintained | Adequate | **Expected minimum rate of cervical dilatation in active labour:** - **Nulliparas:** ≥ 1 cm/hour (Friedman's curve; WHO partograph standard) - **Multiparas:** ≥ 1 cm/hour (multiparas are expected to progress *faster*, not slower, than nulliparas) ### Why This Labour Is Progressing Slowly 1. **Cervical dilatation rate = 0.33 cm/hour** — this is well below the 1 cm/hour minimum for both nulliparas and multiparas. In 6 hours, only 2 cm of progress occurred; the expected minimum would be 6 cm. 2. **Alert line crossed:** The alert line on the partograph represents the slowest acceptable rate of progress (1 cm/hour). Crossing it means the patient has fallen to the right of this line, indicating protracted active phase. 3. **Multiparas are NOT exempt from the alert line:** A common misconception is that multiparas may cross the alert line "normally." In fact, multiparas typically progress *faster* than nulliparas. Slow progress in a multipara is a red flag and warrants prompt evaluation and augmentation. 4. **Fetal descent is occurring** (–1 → 0 station) and contractions are adequate, making obstructed labour (Option D) unlikely at this stage. Emergency caesarean section is not indicated without further evidence of obstruction or fetal compromise. ### Correct Management: Augment with Oxytocin Per WHO Labour Care Guide and Cunningham's Williams Obstetrics (26th ed.), when the alert line is crossed: - **Reassess** the clinical situation (pelvic adequacy, fetal position, contraction quality) - **Augment with oxytocin** if no contraindication (e.g., previous uterine scar with caution, malpresentation) - **Do NOT perform emergency caesarean** unless the action line is crossed, arrest of labour is confirmed, or fetal/maternal compromise is present ### Why Other Options Are Incorrect - **Option A / B (Labour progressing normally):** Incorrect. A rate of 0.33 cm/hour is objectively below the 1 cm/hour threshold. Crossing the alert line is *not* normal or expected in any parity — it is a signal for intervention. - **Option D (Emergency caesarean):** Premature. Fetal descent is occurring and there are no signs of obstruction or fetal distress. Augmentation should be attempted first. **High-Yield:** The WHO partograph alert line applies to all parities. Multiparas progress faster than nulliparas — slow progress in a multipara is more concerning, not less. Alert line crossing = augment (if no contraindication); action line crossing = consider operative delivery. **Clinical Pearl:** Per Williams Obstetrics (26e) and WHO Partograph Guidelines, crossing the alert line mandates active management. In a multipara with adequate contractions but protracted dilatation (< 1 cm/hour), oxytocin augmentation is the appropriate next step, with reassessment at the action line to determine if operative delivery is needed.
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