Hemoptysis is said to be massive when it exceeds what amount in 24hours?
400mL
500mL
600mL
800mL
Massive hemoptysis is generally defined as expectoration of over 600 mL of blood within a 24hour period. It is a medical emergency associated with a moality rate of 30 to 50%. Ref: Harrison; 20th edition pg 233
Respiratory system