Table 1. Severe Maternal Morbidity.

Severe Maternal Morbidity	Conditions
Antepartum hemorrhage with transfusion	Hemorrhage from placenta previa, premature separation of placenta or placental abruption, antepartum hemorrhage associated with coagulation defects, other or unspecified antepartum hemorrhage
Respiratory morbidity	Obstetric pulmonary embolism (including amniotic fluid embolism), pulmonary collapse, acute pulmonary edema, shock (lung), adult respiratory distress syndrome, acute cor pulmonale, pulmonary embolism (septic, iatrogenic, infection, other), respiratory arrest (unknown causes)
Thromboembolism or deep venous thrombosis	Arterial embolism and thrombosis of abdominal aorta, embolism or thrombosis of thoracic aorta, deep venous thrombosis, deep phlebothrombosis antepartum or postpartum, cerebral venous thrombosis including pulmonary thrombosis with clot (venous thromboembolisma)
Cerebrovascular or central nervous system morbidity	Subarachnoid hemorrhage, intracerebral hemorrhage, intracranial hemorrhage (including nontraumatic extradural hemorrhage, subdural hemorrhage, unspecified intracranial hemorrhage), occlusion or stenosis of precerebral arteries, occlusion or stenosis of cerebral arteries, cerebral seizure, apoplexy, hypertensive encephalopathy, nonpyogenic thrombosis of intracranial venous system, hemiplegia, hemiparesis, other paralytic syndromes, encephalopathy, cerebrovascular disorders in puerperium
Cardiac morbidity	Malignant essential hypertension (with and without kidney involvement), malignant hypertension (with and without kidney involvement), acute myocardial infarction, aneurism of pulmonary artery, hemopericardium, constrictive pericarditis, cardiac tamponade, atrial fibrillation or flutter, ventricular fibrillation or flutter, cardiac arrest, heart failure, aortic aneurism and dissection, peripartum cardiomyopathy
Eclampsia	Eclampsia
PPH with transfusion	Postpartum hemorrhage (including PPH with coagulation defects)
Sepsis	Septicemia, septicemia during labor, major puerperal infection, septic shock, systemic inflammatory response syndrome (SIRS)
Acute renal failure	Acute and subacute renal failure, renal failure, unspecified other renal failure (after labor and delivery)
Obstetric shock	Obstetric shock
DIC	Disseminated intravascular coagulation
Uterine rupture	Rupture of uterus before onset of labor or during labor
Complication of anesthesia and obstetric interventions	Pulmonary complications, cardiac complications, CNS complications, other complications of surgery (cardiac arrest or failure after cesarean delivery), other anaphylactic shock, shock due to anesthesia, CNS complications (anoxic brain damage, cerebral hypoxia), iatrogenic cerebrovascular infarction (postoperative stroke), cardiac complications (during procedure), postoperative shock, air embolism (after infusion, perfusion, or transfusion)
Potentially lifesaving interventions	Conversion of cardiac rhythm, operations on heart (valves, septa, vessels), other operations on heart, temporary tracheostomy, other operations on vessels (eg, shunts, stents, sutures), noninvasive mechanical ventilation, nonoperative intubation, other continuous invasive mechanical ventilation, transfusion (any blood products), subtotal or total abdominal hysterectomy, other and unspecified hysterectomy, obstetric tamponade of uterus and vagina, invasive hemodynamic monitoring
Other	Acute and subacute liver failure, Budd-Chiari syndrome

Abbreviations: CNS, central nervous system; PPH, postpartum hemorrhage.

^aIncludes obstetric blood clot embolism and deep venous thrombosis with pulmonary embolism.