NURS 6501: MIDTERM EXAM: Please contact Assignment Samurai for help with NURS 6501: Midterm Exam or any other assignment. Email: assignmentsamurai@gmail.com   A patient with a history of cirrhosis presents with ecchymosis. Laboratory tests reveal prolonged prothrombin time (PT) and normal platelet count. What does the elevated PT most likely indicate in this patient? Group of answer choices

• Vitamin K deficiency secondary to malabsorption
• Impaired hepatic synthesis of coagulation factors
• Increased hepatic synthesis of proteins C and S
• Platelet dysfunction despite normal platelet count

  The correct answer is Impaired hepatic synthesis of coagulation factors. Explanation: The prolonged prothrombin time (PT) in this patient with cirrhosis most likely indicates impaired hepatic synthesis of coagulation factors. The liver is responsible for producing most of the coagulation factors involved in the clotting cascade (such as factors I, II, V, VII, IX, and X). In cirrhosis, the liver’s ability to synthesize these factors is impaired, leading to prolonged PT, which is a measure of clotting function.

• Prolonged PT is a common finding in liver disease, especially cirrhosis, because of the liver's diminished capacity to produce these factors. This explains the patient's ecchymosis (bruising) due to impaired clotting.

Why the other options are incorrect:

• Vitamin K deficiency secondary to malabsorption: Vitamin K is essential for the synthesis of certain clotting factors (II, VII, IX, and X). A vitamin K deficiency can cause a prolonged PT. However, in this patient with cirrhosis, the cause of the prolonged PT is more likely related to impaired liver function rather than a vitamin K deficiency. Moreover, a vitamin K deficiency typically affects both PT and aPTT (activated partial thromboplastin time), and it is less likely to cause isolated PT prolongation.
• Increased hepatic synthesis of proteins C and S: Proteins C and S are natural anticoagulants produced by the liver, and in cirrhosis, their levels are often decreased rather than increased. A decrease in these proteins could increase the risk of thrombosis, but it would not cause a prolonged PT by itself.
• Platelet dysfunction despite normal platelet count: Platelet dysfunction can contribute to bleeding, but it would not cause prolonged PT. Platelet dysfunction typically results in prolonged bleeding time rather than prolonged PT. Since the platelet count is normal in this patient, the issue is more likely related to coagulation factor deficiency rather than platelet dysfunction.

Conclusion: In this patient with cirrhosis, the most likely cause of the elevated PT is impaired hepatic synthesis of coagulation factors. This is a common complication of cirrhosis and results in a bleeding tendency, as evidenced by the patient's ecchymosis.