Epistaxis laboratory findings
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- Complete blood count (CBC): Reduced hemoglobin level is important for bleeding management in patients with heavy and recurrent epistaxis.
- Platelet count: Reduced platelet count is important to find the cause and for the management of patients with heavy and recurrent epistaxis.
- Prothrombin time (PT): Increased PT is important to find the cause and management patients with heavy and recurrent epistaxis.
- Partial thromboplastin time (PTT): Increases PTT is important evaluate if there is any coagulopathy and for the management of such patients.
- Bleeding time (BT): Increased BT is also important to evaluate for coagulopathies and management.
These laboratory tests should be requested in the presence of red flags such as:
- The following findings are of particular concern:
- Hemorrhagic shock or hypovolemic signs
- Use of anticoagulants
- Cutaneous signs of a bleeding disorder
- Persistent bleeding or bleeding that is not stopped by direct pressure or vasoconstrictor-soaked pledgets
- Multiple recurrences with no clear cause
- Krulewitz, Neil Alexander; Fix, Megan Leigh (2019). "Epistaxis". Emergency Medicine Clinics of North America. 37 (1): 29–39. doi:10.1016/j.emc.2018.09.005. ISSN 0733-8627.
- Thornton, M A.; Mahesh, B N.; Lang, J (2005). "Posterior Epistaxis: Identification of Common Bleeding Sites". The Laryngoscope. 115 (4): 588–590. doi:10.1097/01.mlg.0000161365.96685.6c. ISSN 0023-852X.
- Recht, Michael; Chitlur, Meera; Lam, Derek; Sarnaik, Syana; Rajpurkar, Madhvi; Cooper, David L.; Gunawardena, Sriya (2017). "Epistaxis as a Common Presenting Symptom of Glanzmann's Thrombasthenia, a Rare Qualitative Platelet Disorder: Illustrative Case Examples". Case Reports in Emergency Medicine. 2017: 1–6. doi:10.1155/2017/8796425. ISSN 2090-648X.