A 60-Year-Old Man Who Is Receiving Warfarin for Recurrent Deep

question 10

Multiple Choice

A 60-year-old man who is receiving warfarin for recurrent deep vein thrombosis and has had stable, therapeutically appropriate anticoagulation for several months is treated by his physician for a urinary tract infection. Twelve days later he presents to the emergency department with lower gastrointestinal bleeding and is found to have a markedly prolonged prothrombin time. What is the most likely cause?

• A)Thrombin inhibition by a fluoroquinolone antibiotic
• B)Reduced production of vitamin K by gut flora
• C)Direct activation of plasminogen by a cephalosporin
• D)Antibiotic inhibition of VKOR c1
• E)Inhibition of platelet function by a beta-lactamase

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Definitions:

Distress

Extreme anxiety, sorrow, or pain; a negative psychological state caused by external and internal stressors, affecting an individual's emotional well-being.

Breaking Confidentiality

Breaking confidentiality is the act of disclosing private or protected information without consent, violating ethical guidelines or agreements in professional settings.

Duty To Warn

A legal and ethical obligation for certain professionals to disclose information to prevent harm to a specific individual or the public when a client poses a threat.

Lethality

The degree or capability of something to cause death or serious harm.