Why ptt is higher than pt?

PTT (partial thromboplastin time) is typically higher than PT (prothrombin time) because they measure different aspects of the clotting process. PTT assesses the intrinsic and common pathways of coagulation, while PT evaluates the extrinsic and common pathways. Conditions affecting the intrinsic pathway, such as deficiencies in factors VIII, IX, or XI, can prolong PTT without impacting PT. Additionally, PTT is more sensitive to certain anticoagulants and disorders, leading to higher values in specific clinical scenariOS.