A Client Is Prescribed Warfarin for Chronic Atrial Fibrillation

question 5

Multiple Choice

A client is prescribed warfarin for chronic atrial fibrillation. Which laboratory value is most concerning to the nurse?

• A) Platelet count 130,000/microliter
• B) Hematocrit level 31%
• C) Partial thromboplastin time (PTT) 38 seconds
• D) International normalized ratio (INR) 2.8

---

Definitions:

Obturator Foramen

The obturator foramen is a large opening in the pelvic bone through which nerves and blood vessels pass.

Bony Features

Characteristics or structures formed by bone, such as projections, depressions, and openings, that serve as sites for muscle attachment or passages for nerves and blood vessels.

Sella Turcica

A saddle-shaped depression in the sphenoid bone at the base of the human skull that houses the pituitary gland.

Sphenoid Bone

A butterfly-shaped bone at the base of the skull that is connected to all other skull bones.