What indicates the need for coagulation labs (PT/INR) in patients with epistaxis?

The need for coagulation labs, such as PT/INR, in patients with epistaxis is particularly indicated for patients on blood thinners. These patients are at a higher risk for bleeding due to the anticoagulation effects of their medications, which can exacerbate conditions like epistaxis. Monitoring coagulation parameters helps assess the degree of anticoagulation and informs the necessary management steps to control bleeding and prevent further complications.

The other options do not directly correlate with the need for coagulation studies. While patients with a cold may experience nasal congestion or mild irritation that could lead to nosebleeds, it does not typically indicate an underlying coagulopathy. Complaints of fatigue could be associated with many conditions, but do not specifically warrant coagulation testing in the context of epistaxis. Similarly, shortness of breath might arise from various respiratory issues but does not imply the presence of a bleeding disorder that requires investigation of coagulation status. Therefore, the correct indication for coagulation labs in the setting of epistaxis is primarily associated with patients on anticoagulant therapy.