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Table 1 WHO MNM tool groups and subcategories [4]

From: Validating the WHO maternal near miss tool: comparing high- and low-resource settings

Group A Severe complications/potentially life threatening conditions
 A0 Severe postpartum hemorrhage
 A1 Severe pre-eclampsia
 A2 Eclampsia
 A3 Sepsis or severe systemic infection
 A4 Ruptured uterus
Group B Critical interventions or intensive care unit admission
 B0 Use of blood products (includes any blood transfusion)
 B1 Interventional radiology (uterine artery embolization)
 B2 Laparotomy (other than caesarean section)
 B3 Admission to Intensive Care Unit
Group C Organ dysfunction/life-threatening conditions
 C0 Cardiovascular dysfunction: Shock, cardiac arrest (absence of pulse/ heart beat and loss of consciousness), use of continuous vasoactive drugs, cardiopulmonary resuscitation, severe hypoperfusion (lactate >5 mmol/l or >45 mg/dl), severe acidosis (pH <7.1)
 C1 Respiratory dysfunction: Acute cyanosis, gasping, severe tachypnea (respiratory rate > 40 breaths per minute), severe bradypnea (respiratory rate < 6 breaths per minute), intubation and ventilation not related to anesthesia, severe hypoxemia (O2 saturation < 90% for ≥60 min or PAO2/FiO2 < 200)
 C2 Renal dysfunction: Oliguria non-responsive to fluids or diuretics, dialysis for acute renal failure, severe acute azotemia (creatinine ≥300 μmol/ml or ≥3.5 mg/dl)
 C3 Coagulation/ hematologic dysfunction: Failure to form clots, massive transfusion of blood or red cells (≥5 units), severe acute thrombocytopenia (<50,000 platelets/ml)
 C4 Hepatic dysfunction: Jaundice in the presence of pre-eclampsia, severe acute hyperbilirubinemia (bilirubin >100 μmol/l or >6.0 mg/dl)
 C5 Neurologic dysfunction: Prolonged unconsciousness (lasting ≥12 h)/coma (including metabolic coma), stroke, uncontrollable fits/status epilepticus, total paralysis
 C6 Uterine dysfunction/ hysterectomy: Uterine hemorrhage or infection leading to hysterectomy