Also known as: Blood around the heart
Dr. Lim develops cardiac tamponade from a stab wound to the left ventricle during an attack by Dalisay's ex-boyfriend. Shaun performs emergency pericardiocentesis in the break room to save her life.
Also known as: VSD
Dr. Lim's stab wound creates two VSDs in the ventricular septum. The team attempts percutaneous closure but Shaun must identify a second hidden defect to save her life when she goes into fulminant heart failure.
Also known as: Liver injury
Dr. Lim sustains a severe liver laceration from stabbing. Shaun defies Glassman's order to perform a hemi-hepatectomy and instead successfully completes an angio-embolization to preserve the entire liver.
Also known as: Stab wound to neck
Nurse Villanueva suffers multiple stab wounds to the neck including tracheal laceration, jugular injury, and shredded left carotid artery. The team must tie off her carotid artery to stop bleeding, risking stroke.
Also known as: Wrist artery injury
Dr. Lim sustains a defensive wrist laceration with possible radial artery injury during the attack, requiring tourniquet application.
Also known as: Crohn's disease
A patient with Crohn's disease develops a perforated bowel during the lockdown. Morgan and Asher are unable to operate due to his surgical history and lack of supplies, becoming hostages while advocating for his care.
Also known as: Gunshot to the leg
The active shooter is shot multiple times by SWAT in the arm and chest, goes into PEA arrest but is resuscitated. His care creates an ethical dilemma about resource allocation during the crisis.
Also known as: Paralysis
At episode's end, Dr. Lim discovers she is paralyzed in her legs, likely from tying off her carotid artery causing spinal cord ischemia. This becomes a major character arc for the season.