What defines massive hemoptysis in terms of volume?

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Massive hemoptysis is typically defined as expectoration of a significant volume of blood, which can indicate a serious underlying condition. The threshold commonly used to define massive hemoptysis is 600cc (or mL) within a 24-hour period. This definition helps clinicians assess the severity of the situation and determine appropriate interventions, as such a volume can lead to complications like airway obstruction or hypovolemic shock. Recognizing this specific volume is crucial for effective patient management and prioritizing treatment options. The thresholds below this volume are generally classified as minor or moderate hemoptysis, which may not necessitate the same level of immediate intervention or urgency as massive hemoptysis.

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