A 28-year-old primigravida delivers a healthy male infant vaginally after 8 hours of active labor. The third stage of labor is managed expectantly. At 45 minutes postpartum, the uterus is noted to be soft and boggy on abdominal examination. Vaginal bleeding is brisk, with an estimated blood loss of 800 mL. Vital signs: BP 100/62 mmHg, HR 110/min, RR 22/min. The placenta has been expelled completely. What is the most appropriate immediate next step in management?

Explanation

## Diagnosis and Management of Atonic Postpartum Hemorrhage ### Clinical Presentation **Key Point:** The soft, boggy uterus with brisk vaginal bleeding in the immediate postpartum period is pathognomonic for uterine atony — the most common cause of primary postpartum hemorrhage (accounts for 70–80% of cases). ### Immediate Management Algorithm ```mermaid flowchart TD A[Postpartum hemorrhage > 500 mL]:::outcome --> B{Uterus firm?}:::decision B -->|No - Atony| C[Bimanual compression]:::action B -->|Yes| D[Check for trauma/retained products]:::action C --> E[Oxytocin 10 IU IV/IM]:::action E --> F{Bleeding controlled?}:::decision F -->|Yes| G[Continue oxytocin infusion]:::action F -->|No| H[Add ergot alkaloid or misoprostol]:::action H --> I{Still bleeding?}:::decision I -->|Yes| J[Consider interventional radiology or surgery]:::urgent I -->|No| K[Supportive care + transfusion]:::action ``` ### Rationale for Correct Answer **High-Yield:** Bimanual compression is the **first-line mechanical intervention** for atonic PPH. It: 1. Compresses the uterine vessels against the pelvis 2. Stimulates uterine contractions 3. Can be performed immediately without delay 4. Buys time for pharmacological agents to take effect **Clinical Pearl:** Oxytocin (10 IU IV or IM) must be given **simultaneously** with bimanual compression. The combination is more effective than either alone. Oxytocin causes sustained uterine contraction, which compresses bleeding vessels in the placental bed. ### Why Other Options Are Premature | Step | Timing | Indication | |------|--------|------------| | Bimanual compression + oxytocin | **Immediate** | All atonic PPH | | Tranexamic acid | After initial measures fail | Adjunct, not first-line | | Uterine balloon tamponade (Foley/Bakri) | 2nd line | If pharmacological measures fail | | Hysterectomy | Last resort | Uncontrolled hemorrhage despite all measures | **Key Point:** The patient has signs of early hypovolemia (tachycardia, borderline BP) but is still compensated. Aggressive uterotonic therapy now can prevent progression to shock. ### Supportive Measures (Concurrent) - Establish large-bore IV access (2 lines) - Type and cross-match blood; initiate transfusion if Hb drops or bleeding persists - Assess for coagulopathy (PT/INR, aPTT, fibrinogen, platelet count) - Catheterize bladder to monitor urine output **Warning:** Do NOT delay bimanual compression while waiting for imaging or laboratory results. Clinical assessment and immediate intervention are paramount in the first few minutes of PPH.