No you're right. He's using an incredibly obscure term (caval hiatus rather than caval opening/foramen/aperture) for a mild-moderately obscure question. Nevert

No you're right. He's using an incredibly obscure term (caval hiatus rather than caval opening/foramen/aperture) for a mild-moderately obscure question. Nevertheless I would wager most clinicians (except for surgeons, radiologists or cardiologists) wouldn't know the answer to this question. You learn this in first year of medical school and then forget it.