TY - CHAP M1 - Book, Section TI - Chapter 33. Hemoptysis A1 - Dixon, Jeffrey A2 - Cline, David M. A2 - Ma, O. John A2 - Cydulka, Rita K. A2 - Meckler, Garth D. A2 - Handel, Daniel A. A2 - Thomas, Stephen H. PY - 2012 T2 - Tintinalli's Emergency Medicine Manual, 7e AB - Hemoptysis is the expectoration of blood from the lower respiratory tract. Massive hemoptysis, defined somewhat arbitrarily as a bleeding rate exceeding 600 mL per 24 hours, constitutes an emergency and requires prompt intervention to prevent asphyxiation from impaired gas exchange. Minor hemoptysis, the production of smaller quantities of blood (often mixed with mucus), is rarely life threatening but requires careful ED management. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=56272612 ER -