Also known as: Narcotic overdose
Jeremy overdoses at a party, requiring emergency cricothyrotomy by Ethan in the field. Later discovered to be Percocet overdose with toxic acetaminophen levels causing liver damage and seizures, which becomes central to the subplot about stolen hospital drugs.
Also known as: Tylenol poisoning
Jeremy develops toxic acetaminophen levels from Percocet overdose, causing liver damage, jaundice, and seizures requiring NAC treatment.
Also known as: Heart valve defect
Tracy, 21 weeks pregnant, collapses due to previously undiagnosed congenital mitral valve disease. Undergoes risky valve replacement surgery to preserve pregnancy, but develops fatal complications including hemorrhage and valve thrombosis, ultimately dying.
Also known as: Placental separation
Tracy's pregnancy is complicated by placenta previa, which causes life-threatening bleeding after her valve surgery and contributes to her death.
Also known as: Severe flu
Cody, an unvaccinated child, develops severe influenza leading to respiratory failure requiring intubation. Conventional treatments fail, requiring experimental partial liquid ventilation (PLV) treatment.
Also known as: Mast cell disease
Cody is discovered to have undiagnosed systemic mastocytosis with severe allergies and excessive histamine production, which would have caused fatal anaphylactic shock if treated with ECMO as initially planned.