## Indications: Vacuum vs. Forceps **Key Point:** The choice between vacuum and forceps depends on the clinical scenario — position, station, and the goal of the intervention (descent vs. rotation). ### Vacuum Extraction — Best For: 1. **Low-cavity delivery** (station ≥ +2, head at or below 0 station in some definitions) 2. **Occiput anterior (OA) position** — ideal scenario 3. **Need for gentle, progressive descent** with maternal effort 4. **Maternal exhaustion** — allows rest between contractions 5. **Lower risk of maternal trauma** (no perineal extension needed for placement) ### Forceps Delivery — Best For: 1. **Mid-cavity delivery** (station +1 to +2) with **rotational need** 2. **Occiput transverse (OT) or occiput posterior (OP)** requiring rotation 3. **Immediate descent needed** (e.g., non-reassuring fetal heart rate) 4. **Suspected cephalopelvic disproportion** — forceps allow assessment of pelvic adequacy 5. **Prematurity** — lower risk of scalp trauma (chignon, cephalohematoma) **Clinical Pearl:** Vacuum is the "gentler" instrument for straightforward low-cavity OA deliveries. Forceps are the "control" instrument for rotation and mid-cavity work. **High-Yield:** Station +1 with OA position and need for descent = vacuum. Station +1 with OT/OP position and need for rotation = forceps. | Scenario | Best Choice | Reason | |----------|-------------|--------| | OA, station ≥ +2, descent needed | Vacuum | Progressive, gentle traction | | OT/OP, station +1, rotation needed | Forceps | Rotational control | | Suspected CPD | Forceps | Allows assessment; vacuum may fail silently | | Prematurity | Forceps | Lower scalp injury risk | | Maternal exhaustion, OA | Vacuum | Allows rest between pulls |
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