Physiology A patient has a congenital deficiency in factor XIII (fibrin-stabilizing factor). What would analysis of his blood reveal? A Prolonged prothrombin time B Prolonged whole blood clotting time C Prolonged paial thromboplastin time D Easily breakable clot 💡 Explanation A patient has a congenital deficiency in factor XIII (fibrin-stabilizing factor). What would analysis of his blood reveal? ✓ Correct Answer: D. Easily breakable clot