Clinical Reference Guide

Obstetric ICU Emergencies

A Comprehensive Clinical Experience Guide for Critical Care in Obstetrics

MBBS, MD (Obs & Gynec) | ICU Intensivist | Emergency Medicine Specialist

12
Emergencies
48
Protocols
96
Clinical Tips
∞
Lives Saved

⚡ Immediate Protocol (First 15 Minutes)

0 min: Call CODE OB HEMORRHAGE — Activate massive transfusion protocol (MTP). Two 16G IV lines. Elevate legs. 100% O₂ via non-rebreather mask.

2 min: Bimanual uterine compression. Oxytocin 40 IU in 500ml NS at 250ml/hr. Tranexamic acid 1g IV over 10 min (WOMAN trial protocol).

5 min: If atonic: Carboprost (Hemabate) 250mcg IM q15min (max 8 doses). Misoprostol 800–1000mcg PR/SL. Methylergometrine 0.2mg IM (avoid in hypertension!).

10 min: Send bloods: CBC, coagulation, fibrinogen, crossmatch 6 units. Start O-negative PRBC if crossmatch not ready. Target fibrinogen >2g/L with cryoprecipitate.

15 min: If medical management fails → Bakri balloon tamponade (inflate 300–500ml). Prepare for surgical intervention: B-Lynch suture, uterine artery ligation, or peripartum hysterectomy.

📋 4 T's Etiology

  • • Tone (70%) — Uterine atony. Risk: polyhydramnios, macrosomia, prolonged labor, grand multiparity
  • • Trauma (20%) — Cervical/vaginal lacerations, uterine rupture, uterine inversion
  • • Tissue (9%) — Retained placenta, placenta accreta spectrum
  • • Thrombin (1%) — DIC, coagulopathy, anticoagulant use

🩸 Transfusion Targets

  • • PRBC:FFP:Platelet = 1:1:1 ratio
  • • Hb target: >7 g/dL (>8 if cardiac disease)
  • • Fibrinogen target: >2 g/L (critical in obstetrics)
  • • Platelets target: >50 × 10⁹/L
  • • Ionized Ca²⁺: Replace after every 4 units PRBC
  • • Avoid hypothermia: Use blood warmer

🏥 Clinical Pearl — From the ICU

"In my 15+ years of managing obstetric hemorrhage, the single most important factor is speed of recognition. By the time a young obstetric patient becomes tachycardic, she has already lost 1.5–2 liters. Young women compensate until they suddenly decompensate — there is no gradual decline. Quantify blood loss visually AND by weight. A soaked pad = 100ml, a soaked abdominal sponge = 150ml. Never wait for lab results to start transfusion. Fibrinogen drops fastest and predicts DIC — check it early and often."

⚡ Eclamptic Seizure — Immediate Management

During seizure: Left lateral position. Protect airway — DO NOT insert anything into mouth. Suction if needed. 100% O₂. Time the seizure.

MgSO₄ Loading: 4g IV over 15–20 min (Zuspan regimen) OR 4g IV + 10g IM (Pritchard regimen for resource-limited settings). This is the ONLY first-line drug. Not diazepam. Not phenytoin.

MgSO₄ Maintenance: 1–2g/hr IV infusion for 24h post last seizure or post delivery. Monitor: Patellar reflexes, RR >16, urine output >25ml/hr.

Recurrent seizure: Additional 2g MgSO₄ IV over 5 min. If still seizing → Midazolam 2mg IV or Thiopental for intubation.

💊 Antihypertensive Protocol

  • • 1st line: Labetalol 20mg IV → 40mg → 80mg q10min (max 300mg)
  • • 2nd line: Hydralazine 5–10mg IV q20min
  • • 3rd line: Nifedipine 10–20mg PO q30min (avoid sublingual!)
  • • Target: SBP 140–150, DBP 90–100 (not lower!)
  • • Avoid: ACE inhibitors, ARBs (teratogenic). Nitroprusside (cyanide toxicity to fetus)

⚠️ HELLP Syndrome

  • • Hemolysis: LDH >600, schistocytes, bilirubin ↑
  • • ELevated Liver enzymes: AST >70 IU/L
  • • LPow Platelets: <100 × 10⁹/L
  • • Delivery is the definitive treatment
  • • Dexamethasone 10mg IV q12h may ↑ platelets
  • • Risk: DIC, hepatic rupture, abruption, renal failure

🏥 Clinical Pearl

"MgSO₄ toxicity kills. Always keep calcium gluconate 1g at the bedside as the antidote. The triad of toxicity: loss of patellar reflexes → respiratory depression → cardiac arrest. In resource-limited settings where infusion pumps are unavailable, Pritchard's IM regimen is lifesaving. I've managed eclampsia in district hospitals with just MgSO₄ ampules and a competent nurse — and it works. The key is not to panic and not to reach for diazepam first."

⚡ Recognition & Response

  • Presentation: Sudden dyspnea → hypotension → altered consciousness → seizures → DIC → cardiac arrest. Often occurs during labor, C-section, or immediately postpartum.
  • Immediate: Call for help. ABCDE approach. Intubate early (these patients crash fast). High-flow O₂. Two large-bore IVs. Arterial line ASAP.
  • Hemodynamics: Initially RIGHT heart failure (pulmonary vasospasm) → then LEFT heart failure. Norepinephrine 0.1–0.5 mcg/kg/min as first vasopressor. Consider dobutamine if LV failure predominates.
  • Coagulopathy: Often develops severe DIC within 30 min. Aggressive MTP: PRBC, FFP, cryoprecipitate, platelets. Consider rFVIIa (NovoSeven) as rescue therapy.
  • If cardiac arrest: Standard ACLS but with LEFT UTERINE DISPLACEMENT. Perimortem cesarean within 4 minutes if ≥23 weeks. This saves BOTH mother and baby.

🏥 Clinical Pearl

"AFE is the most terrifying obstetric emergency. A perfectly healthy woman delivering her baby can be dead within minutes. I recall a case — a G2P1 during active labor who suddenly gasped, desaturated to 60%, and became pulseless within 90 seconds. We performed perimortem cesarean at 4 minutes. Both survived. The lesson: have a rehearsed protocol. You will not have time to think. Diagnosis is clinical — do NOT wait for any lab confirmation."

🔍 Diagnosis

  • • Dyspnea, orthopnea, PND, peripheral edema
  • • BNP/NT-proBNP markedly elevated
  • • Echo: EF <45%, dilated LV, global hypokinesis
  • • CXR: Cardiomegaly, pulmonary edema
  • • Trap: Symptoms mimic normal late pregnancy!

💊 ICU Management

  • • Antenatal: Hydralazine + nitrates (no ACEi!)
  • • Postpartum: ACEi/ARB + β-blocker + diuretic
  • • Bromocriptine 2.5mg BD × 2 weeks (anti-prolactin, cardioprotective)
  • • Anticoagulation if EF <30% or LV thrombus
  • • If cardiogenic shock → Inotropes → ECMO/VAD if available

🏥 Clinical Pearl

"The tragedy of PPCM is delayed diagnosis. I've seen patients referred as 'anxiety' or 'normal pregnancy breathlessness' who were actually in florid heart failure with an EF of 15%. Rule of thumb: if a pregnant or postpartum woman says she can't breathe lying down, get a BNP and echo THAT DAY. Early bromocriptine has changed outcomes dramatically — advocate for it. Recovery to normal EF occurs in ~50% of patients, but EF <30% at diagnosis carries significant mortality."

⚡ Hour-1 Sepsis Bundle (Adapted for Obstetrics)

  • ✅ Measure lactate. If >2 mmol/L → re-measure within 2–4 hrs
  • ✅ Blood cultures × 2 + HVS + urine culture + wound swab BEFORE antibiotics
  • ✅ Broad-spectrum antibiotics within 1 hour: Piperacillin-tazobactam 4.5g IV + Clindamycin 900mg IV (covers GAS & anaerobes). Add Gentamicin 5mg/kg if septic shock.
  • ✅ IV crystalloid 30ml/kg if hypotensive or lactate ≥4 (use balanced crystalloid — Ringer's lactate preferred over NS)
  • ✅ Vasopressors if MAP <65 despite fluids → Norepinephrine first line. Target MAP ≥65 mmHg.

🔎 Common Sources in Obstetrics

  • • Chorioamnionitis: Fever + uterine tenderness + fetal tachycardia. Deliver promptly.
  • • Endometritis: Post-cesarean or post-delivery. Foul lochia, fever.
  • • Pyelonephritis: Most common non-genital source. Flank pain + fever + pyuria.
  • • Wound infection/Necrotizing fasciitis: Rapidly progressive. Surgical emergency!
  • • Group A Strep (GAS): Can cause fulminant sepsis within hours. Think of it in every postpartum fever!
  • • Septic abortion: Retained products + infection. Evacuation is source control.

🏥 Clinical Pearl

"Obstetric patients are physiologically vasodilated with high cardiac output. A 'normal' BP of 110/70 in a previously hypertensive preeclamptic patient IS shock. Use the obstetric early warning score (MOEWS). The most lethal mistake I've seen is treating endometritis with antibiotics alone when there is a 6cm pelvic abscess requiring drainage. Source control means: if there's pus, drain it. If there are retained products, evacuate them. Antibiotics without source control = death."

⚡ Massive PE Protocol

  • If hemodynamically unstable: UFH 80 IU/kg bolus → 18 IU/kg/hr infusion. Do NOT wait for CTPA!
  • Thrombolysis: Alteplase 100mg IV over 2 hours. Pregnancy is a RELATIVE contraindication — in massive PE with arrest, GIVE IT. The alternative is death.
  • If cardiac arrest: Prolonged CPR (at least 60 min). Consider surgical embolectomy or catheter-directed therapy if available.
  • Stable PE: LMWH (Enoxaparin 1mg/kg BD). Avoid warfarin antenatally (teratogenic). CTPA is preferred over V/Q scan.
  • Postpartum: Switch to warfarin (safe in breastfeeding). Target INR 2–3 for minimum 6 weeks.

🏥 Clinical Pearl

"D-dimer is useless in pregnancy — it's physiologically elevated. If you suspect PE, go straight to imaging. In a crashing patient, bedside echo showing RV dilation and McConnell's sign is enough to start thrombolysis. I have personally administered alteplase to a 34-week pregnant woman in PEA arrest — she survived, delivered a healthy baby 3 weeks later. Do not let fear of bleeding complications kill your patient."

🔬 Obstetric Causes

  • • Placental abruption (most common)
  • • Amniotic fluid embolism
  • • HELLP syndrome
  • • Sepsis / chorioamnionitis
  • • Retained dead fetus (>4 weeks)
  • • Massive hemorrhage / transfusion
  • • Acute fatty liver of pregnancy

💉 Replacement Therapy

  • • FFP 15ml/kg if PT/APTT >1.5× normal
  • • Cryoprecipitate 10 units if fibrinogen <2 g/L
  • • Platelets if <50 × 10⁹/L with active bleeding
  • • Tranexamic acid 1g IV (adjunct)
  • • Monitor: Fibrinogen q1–2h, PT/APTT, D-dimer, FDP

🏥 Clinical Pearl

"DIC is not a diagnosis — it's a complication. If you're replacing factors faster than the patient is using them, you're losing the battle. The obstetric fibrinogen normal is 4–6 g/L, NOT 2–4 g/L. A fibrinogen of 2.5 g/L in an obstetric patient means she is ALREADY in early DIC. In abruption with DIC, deliver the baby and the placenta — that's your source control. Every minute of delay increases factor consumption."

⚡ Recognition & Response

  • Signs: Sudden fetal bradycardia (most reliable), loss of station, cessation of contractions, maternal tachycardia, sudden abdominal pain, vaginal bleeding, palpable fetal parts through abdomen
  • Action: Category 1 cesarean section — Decision-to-delivery interval <15 minutes. Simultaneous resuscitation. Call neonatal team.
  • Surgical: Repair if possible (future fertility desired + clean edges). Hysterectomy if hemorrhage uncontrolled or extensive damage.
  • Fetal outcomes: Depend on time from rupture to delivery. Beyond 18 min = significant risk of hypoxic brain injury.

🏥 Clinical Pearl

"In VBAC, the CTG is your lifeline. A sudden, prolonged deceleration with loss of variability in a previously normal trace should be treated as rupture until proven otherwise. I have performed crash cesareans in under 10 minutes for this — the team drills make the difference. Never allow VBAC without an OT team immediately available. A previous classical (vertical) scar is an absolute contraindication for VBAC — the rupture rate is 4–9%."

Accreta

Adheres to myometrium
Does not invade

Increta

Invades into
myometrium

Percreta

Penetrates through to
bladder/serosa

Planned Delivery Protocol

  • • Deliver at 34–36 weeks in a center with blood bank, ICU, and multidisciplinary team
  • • Crossmatch 6 PRBC + 4 FFP. Cell-saver in OT. Interventional radiology on standby for balloon occlusion of internal iliac arteries
  • • Midline vertical skin incision. Upper segment hysterotomy (AVOID the placenta). Deliver baby. DO NOT attempt to remove placenta
  • • Proceed to cesarean hysterectomy with placenta in-situ. Urology if bladder involvement (percreta)
  • • Average blood loss: 3–5 liters. Have MTP activated pre-operatively

🏥 Clinical Pearl

"The single worst thing you can do with a suspected accreta is try to pull the placenta off. I have seen an accreta turned into a 7-liter hemorrhage by a trainee who 'just wanted to see if it would come.' If the placenta does not separate with gentle cord traction within 30 seconds at cesarean — STOP. Leave it. Close. Plan the hysterectomy. MRI with gadolinium postpartum (if antenatal diagnosis missed) can guide surgical planning."

📋 Swansea Criteria (≥6 needed)

• Vomiting
• Abdominal pain
• Polydipsia/polyuria
• Encephalopathy
• Bilirubin >14 μmol/L
• Hypoglycemia <4 mmol/L
• Uric acid >340 μmol/L
• Leukocytosis >11
• Ascites/bright liver on USS
• AST/ALT >42 IU/L
• Ammonia >47 μmol/L
• Renal impairment Cr >150
• Coagulopathy PT >14s
• Microvesicular steatosis on biopsy

Management

  • • Stabilize: Correct hypoglycemia (10% dextrose infusion), correct coagulopathy, manage encephalopathy (lactulose + rifaximin)
  • • Deliver: As soon as stabilized. Vaginal if favorable, cesarean if not. This is the ONLY cure.
  • • Post-delivery: Monitor in ICU for 48–72h. Liver function usually recovers within 1–2 weeks. If worsening → consider liver transplant referral.
  • • Differentiate from HELLP: AFLP has hypoglycemia, elevated ammonia, DIC, and low AT-III. HELLP has hemolysis + thrombocytopenia predominating.

🏥 Clinical Pearl

"AFLP is the great mimicker. I've seen it present as 'gastritis' and diagnosed only when the patient became encephalopathic. The key distinguishing feature from HELLP: check the glucose and ammonia. Profound hypoglycemia in a third-trimester patient with liver dysfunction = AFLP until proven otherwise. These patients need ICU from the moment of diagnosis. Post-delivery, they can still deteriorate for 48 hours before improving."

⚡ Modified ACLS for Pregnancy

  • BLS: Standard CPR with hand placement slightly HIGHER on sternum. Left uterine displacement (15–30° wedge or manual displacement) — continuous.
  • ACLS: Standard algorithms apply. All drugs at standard doses. Defibrillation at standard energy — it does NOT harm the fetus. Remove fetal monitors before defib.
  • 4 Minutes: If no ROSC by 4 min AND ≥23 weeks gestation → BEGIN perimortem cesarean. Delivery within 5 min of arrest = best outcomes for BOTH. This aids maternal resuscitation by relieving aortocaval compression.
  • Intubation: Use 6.0–7.0 ETT (smaller due to airway edema). Expect difficult airway. Rapid desaturation. Video laryngoscope preferred.

🧠 Reversible Causes (BEAUTIFHUL)

Bleeding/DIC
Embolism (PE/AFE)
Anesthetic complications
Uterine atony
Trauma
Immune (anaphylaxis)
Fever/sepsis
Hyper/hypo (K⁺, Mg²⁺)
Unstable cardiac (MI, aortic dissection)
Long QT / toxins

🏥 Clinical Pearl

"Perimortem cesarean is NOT about saving the baby — it's about saving the mother. Removing the gravid uterus eliminates aortocaval compression and returns 30% of cardiac output to maternal circulation. I have seen ROSC occur within seconds of delivery. Have a scalpel on the crash cart. The decision is not 'should we cut?' — it's 'are we fast enough?' Drill this with your team. Every OB unit should simulate this quarterly."

⚠️ Why OB Airways Are Dangerous

  • • Airway edema (especially in preeclampsia)
  • • Weight gain + large breasts → short neck, difficult positioning
  • • Reduced FRC → desaturation in 60–90 seconds (vs 3–5 min in non-pregnant)
  • • Full stomach (delayed gastric emptying) → aspiration risk
  • • Engorged mucosal vessels → bleed with instrumentation

✅ Failed Intubation Drill

  • 1. Max 2 intubation attempts by most experienced person
  • 2. Declare failed intubation. Call for help.
  • 3. Insert 2nd-gen supraglottic airway (i-gel/LMA)
  • 4. If successful → Continue anesthesia or wake up
  • 5. If CICO → Front-of-neck access (cricothyroidotomy)
  • 6. Preoxygenate to SpO₂ 100% with 15° head-up tilt + ramped position

🏥 Clinical Pearl

"Every obstetric unit must have a video laryngoscope and a surgeon who can perform a cricothyroidotomy. Period. In my experience, the obstetric patient who desaturates to 70% during a failed intubation has about 30 seconds before bradycardia. Pre-oxygenation with high-flow nasal oxygen DURING laryngoscopy (NODESAT technique) buys you precious time. Always use RSI with cricoid pressure. And for Mendelson's aspiration — pH <2.5 gastric content is essentially acid burns to the lungs. Ranitidine 50mg IV + metoclopramide 10mg IV + sodium citrate 30ml PO before GA is non-negotiable."

📞 Quick Emergency Drug Reference

Drug Dose Indication Caution
Oxytocin 40 IU in 500ml NS Uterine atony Hypotension if bolused fast
MgSO₄ 4g IV loading → 1–2g/hr Eclampsia Toxicity → Ca gluconate 1g
Tranexamic Acid 1g IV over 10 min PPH, DIC Give within 3h of onset
Carboprost 250mcg IM q15min Refractory atony Avoid in asthma!
Labetalol 20→40→80mg IV q10min Severe hypertension Avoid in asthma/heart block
Norepinephrine 0.1–0.5 mcg/kg/min Septic/cardiogenic shock Via central line ideally
Alteplase 100mg IV over 2h Massive PE Pregnancy = relative CI only

This clinical reference is based on personal experience and current evidence-based guidelines (RCOG, ACOG, WHO, SSC). Not a substitute for clinical judgment. Updated protocols should always be consulted.