Post natal delivery patient intubated in view of post cpr and on nor adr and vasopressin. following delivery a few days ago developed distress on 2nd day and on 3 rd day while intubating developed Brady and a systole for which she was intubated and cpr done revived and now in icu. Chest has white out lung with query pneumothorax and echo shows rv and lv dilation. What’s next
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amniotic fluid embolism management ICU
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Critical ICU Management: Post-Partum Cardiac Arrest with Biventricular Failure, White-Out Chest, and ?Pneumothorax
Working Diagnosis
The clinical picture is almost textbook Amniotic Fluid Embolism (AFE) - also called "anaphylactoid syndrome of pregnancy." The diagnostic triad is satisfied:
| Criterion | This Patient |
|---|---|
| Sudden cardiopulmonary arrest | Asystole/Brady during intubation on Day 3 |
| Respiratory compromise | White-out bilateral opacities, on ventilator |
| Onset during labor or within 30 min of delivery | Post-natal within days |
| DIC (often present) | Needs to be checked |
AFE causes a biphasic hemodynamic collapse: initial pulmonary hypertension (obstructing RV outflow) followed by LV failure, explaining the biventricular dilation on echo. Bilateral opacities represent high-permeability pulmonary edema (not cardiogenic primarily).
- Murray & Nadel's Textbook of Respiratory Medicine, p. 2259
- Fishman's Pulmonary Diseases, p. 2129
Immediate Priorities (Systematic Order)
1. RULE OUT TENSION PNEUMOTHORAX - Do This NOW
The "query pneumothorax" on chest X-ray in a ventilated patient is a life-threatening emergency that must be acted on before anything else:
- Bilateral white-out + hemodynamic instability on a ventilated patient: high suspicion for bilateral pneumothorax (can occur from barotrauma during aggressive bag-mask ventilation or during CPR with rib fractures)
- Bedside ultrasound (POCUS): absent lung sliding = pneumothorax; M-mode "barcode sign"
- Do NOT wait for CT - if clinically suspected (absent breath sounds, high peak airway pressures, worsening hemodynamics), place bilateral chest drains (28-32F) empirically
- If unstable and no time for USS: needle decompression (2nd ICS mid-clavicular line) as a bridge
This must be excluded before attributing everything to AFE/cardiomyopathy - a missed tension pneumothorax is immediately fatal.
2. Ventilator - Lung-Protective Strategy
Once pneumothorax is drained or excluded:
- TV 4-6 ml/kg IBW (avoid over-distension in biventricular failure)
- PEEP 8-12 cmH2O (balance oxygenation vs. RV preload reduction) - avoid excessive PEEP as it increases RV afterload
- FiO2 1.0 initially, wean to keep SpO2 >92%
- Prone positioning if P/F ratio <150 despite optimization (evidence-based in ARDS)
- Target plateau pressure <30 cmH2O; driving pressure <15 cmH2O
- Permissive hypercapnia acceptable (PaCO2 50-60) to avoid high pressures; avoid hypercapnia however as it worsens pulmonary hypertension and RV failure
3. Hemodynamic Management - Vasopressors and Biventricular Failure
She is already on noradrenaline + adrenaline + vasopressin (triple vasopressor support). This is correct for AFE:
For RV failure with pulmonary hypertension:
- Vasopressin (already on) - ideal: maintains systemic BP without worsening pulmonary vascular resistance (unlike noradrenaline at high doses)
- Add inhaled pulmonary vasodilators: inhaled nitric oxide (iNO) 20-40 ppm OR inhaled prostacyclin (iloprost) to reduce RV afterload - this is a key intervention not yet mentioned
- Consider sildenafil if iNO not available (PDE5 inhibitor, reduces PVR)
- Avoid fluid overload - RV dilation worsens with excess filling; consider gentle diuresis once perfusion secured
For LV failure/cardiogenic shock:
- Adrenaline is appropriate as inotrope + vasopressor
- Consider adding dobutamine if predominantly inotropic support needed, but be cautious with tachycardia
- Echo-guided fluid management: avoid preload augmentation if RV is dilated
Target MAP >65 mmHg, ideally >70 in post-partum uterus to prevent further hemorrhage.
4. ECMO - Strongly Consider Now
This is the most important escalation decision. The textbooks are explicit:
"Consider extracorporeal membrane oxygenation (ECMO) after prolonged arrest or severe ventricular dysfunction unresponsive to medical management." - Creasy & Resnik's Maternal-Fetal Medicine, p. 6144
"VA-ECMO for cardiogenic shock associated with respiratory failure, and RV failure" - Miller's Anesthesia, 10e
Indications met in this patient:
- Post-cardiac arrest (prolonged CPR)
- Biventricular dilation / failure
- Refractory shock on triple vasopressors
- Bilateral ARDS white-out (respiratory failure)
VA-ECMO (veno-arterial) is preferred because it provides both cardiac and respiratory support simultaneously. Contact ECMO team / consider transfer to ECMO center if not available. VA-ECMO in post-partum AFE has demonstrated survival in case series.
5. Coagulopathy / DIC - Check and Treat
AFE causes consumptive coagulopathy (DIC) from thromboplastic activity of amniotic fluid. This is often the cause of ongoing hemodynamic instability:
- Urgent labs: PT/APTT, fibrinogen, D-dimer, platelet count, blood film
- Consider TEG/ROTEM (point-of-care) for real-time coagulopathy guidance
- Massive transfusion protocol if DIC confirmed: pRBC:FFP:Platelets in 1:1:1 ratio
- Cryoprecipitate if fibrinogen <1.5 g/L (AFE causes profound hypofibrinogenemia)
- Avoid recombinant Factor VIIa - a systematic review found worse outcomes (major organ thrombosis) in AFE patients - Creasy & Resnik's, p. 6146
- Tranexamic acid: may be considered for hemorrhage but use cautiously given risk of paradoxical thrombosis in DIC
6. Investigations Required Urgently
| Investigation | Purpose |
|---|---|
| Repeat CXR post-drains | Confirm pneumothorax drained / lung re-expansion |
| Bedside echo (TTE/TEE) | RV pressure, TAPSE, LV EF, pericardial effusion, IVC |
| ABG | pH, PaO2/FiO2 ratio (severity of ARDS), PaCO2 |
| Full coagulation screen + TEG | DIC profile |
| CBC, urea, creatinine, LFTs | Multi-organ involvement |
| Troponin, BNP/NT-proBNP | Degree of myocardial injury |
| Blood cultures x2 | Exclude septic shock as co-trigger |
| Lactate | Perfusion adequacy |
| CT Pulmonary Angiography | If stable enough - to exclude massive PE (important differential) |
7. Differential Diagnoses to Keep in Mind
While AFE is most likely, actively exclude:
- Massive Pulmonary Embolism (PE) - also causes biventricular strain, can present post-partum; CTA-PA or echo RV strain pattern
- Peripartum Cardiomyopathy (PPCM) - more gradual, LV dominant, less dramatic acute presentation; echo shows dilated LV with low EF
- Septic shock with ARDS - fever, source (uterine/wound), blood cultures
- Aspiration pneumonitis/pneumonia - unilateral or bilateral infiltrates, history of vomiting
Summary Action Plan (Next 1-4 Hours)
1. POCUS bilateral lung → drain pneumothorax if present (bilateral ICC)
2. Lung-protective ventilation (TV 6ml/kg, PEEP 10, prone if P/F <150)
3. Inhaled NO or iloprost (RV afterload reduction)
4. Urgent echo (TEE preferred) to reassess RV/LV function
5. DIC screen + 1:1:1 MTP if coagulopathy confirmed
6. ECMO team activation - VA-ECMO indication is already present
7. ICU monitoring: arterial line, CVC/PA catheter, urinary catheter
8. Consider CTA-PA when hemodynamically stable enough
This patient has an extremely high mortality - multiple organ failure post-AFE/cardiac arrest with ARDS and biventricular failure. The only interventions that change outcome are early ECMO and aggressive treatment of DIC. Even with optimal care, AFE mortality is 20-43% in modern series; post-cardiac arrest adds further risk.
Sources: Murray & Nadel's Textbook of Respiratory Medicine; Fishman's Pulmonary Diseases and Disorders; Creasy & Resnik's Maternal-Fetal Medicine, pp. 6144-6146; Miller's Anesthesia, 10e
Create a one-page AFE/biventricular failure ICU checklist with medication algorithms
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Clean build - no errors. The checklist is ready.
Here is your one-page ICU checklist:
AFE ICU Checklist
Presentation · PPTX
What's inside (5-column layout on a single wide slide):
| Column | Content |
|---|---|
| ① Pneumothorax | POCUS protocol, needle decompression, bilateral ICC criteria, post-drain checks, monitoring targets |
| ② Ventilator | ARDSnet settings (TV/PEEP/FiO2), RV-safe PEEP caution, proning trigger (P/F <150), bronchoscopy, ABG targets |
| ③ Vasopressors | Drug boxes for NorAdr + Adr + Vasopressin with doses, then iNO / inhaled iloprost / sildenafil algorithms for RV afterload reduction, AVOID list |
| ④ DIC/Coags | Urgent labs, 1:1:1 MTP protocol, TEG/ROTEM targets, TXA dosing, uterine hemorrhage drugs, explicit rFVIIa warning |
| ⑤ ECMO/Escalate | VA-ECMO indications (all met in this patient), cannulation specs, echo parameters (TAPSE/D-sign/RV:LV), investigation checklist, escalation contacts |
Color coding: Red = immediate action / danger, Amber = caution/warning, Green = targets/OK, Purple = ECMO, Blue = ventilator. Designed for A3 print or full-screen ICU display.
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