Subclinical Lunar Pulmonary Embolism
Earth designation: Subclinical Pulmonary Embolism
Subclinical presentation of Pulmonary Embolism in lunar residents. Life-threatening blockage of pulmonary arteries by blood clot, usually originating from deep vein thrombosis. In a lunar habitat, the limited diagnostic and treatment capabilities make this one of the most feared emergencies. Mortality without immediate treatment approaches 30% for massive PE.
Lunar Risk Factors
All DVT risk factors. Radiation-induced coagulation abnormalities. Limited access to advanced interventional cardiology. 1.3-second communications delay prevents real-time telemedicine guidance during resuscitation.
Symptoms
Sudden severe dyspnea, pleuritic chest pain, hemoptysis, syncope, cardiovascular collapse.
Lunar Presentation
Oxygen saturation drop on continuous monitoring may be the first sign. Tachycardia and hypotension. Right heart strain visible on portable ECG.
Diagnosis
Clinical: Wells score + oxygen saturation monitoring + ECG. CT pulmonary angiography not available — rely on clinical diagnosis plus portable ultrasound (right heart strain, McConnell's sign).
Treatment
Anticoagulation, hemodynamic support, systemic thrombolysis for massive PE.
Lunar Medical Bay Protocol
PRIORITY ALPHA — activate emergency protocol. Administer O2, unfractionated heparin IV bolus (80 units/kg). If massive PE with cardiovascular collapse: systemic thrombolysis with alteplase (only if trained). Prepare for potential CPR (lunar gravity affects technique — adjust compression ratio). Immediate evacuation contact. Earth telemedicine guidance critical.
Evacuation Criteria
All suspected pulmonary emboli warrant evacuation consideration. Massive PE requires immediate evacuation if patient stable enough for transport.
Prevention
Aggressive DVT prevention. Maintain anticoagulation stocks. Yearly thrombophilia screening for high-risk residents.