The Diagnostic Value of APTT/Fibrinogen Ratio in Pulmonary Embolism

Inclusion Criteria: 1. Voluntary signing of informed consent form; 2. When signing the informed consent form, the age is equal to or greater than 18 years old, regardless of gender; 3. From January 1, 2023 to December 30, 2023, the patient was diagnosed with suspected pulmonary embolism at the Southern Hospital of Southern Medical University and underwent enhanced pulmonary artery scanning examination. Exclusion Criteria: 1. Patients with gastrointestinal bleeding, severe trauma, acute coronary syndrome, severe liver disease (childC grade), and coagulation dysfunction; 2. Patients with pulmonary embolism diagnosed outside the hospital and regular anticoagulation; 3. Patients undergoing regular anticoagulant therapy such as atrial fibrillation and valve replacement; 4. Patients deemed unsuitable for participation in this study by the researchers.