Emergency Medicine Case of the Week

Case #10   -- Warfarin Toxicity

Learning Objectives

After reviewing this case you will be able to:
  • Understand the mechanism of warfarin toxicity
  • Institute emergency treatment for this problem
  • Know how to monitor the patient's progress with treatment

Case Presentation by:  Lani Krauss, Jenee Green and Tricia Scarpulla

Patient Profile: "Sippsy", a 2-year old, spayed female mix breed.

sippsey.jpg (44656 bytes)

History: "Sippsy" presented to the emergency service on 6/12/98.   Her owner said she had been lethargic and anorexic for a few days and was now dyspneic.  The owner said she had put out some rat poison a week ago and the box was now missing.

Physical Examination:  Heart rate = 170/minute.  Pulse rate = 170/minute.  Respiratory rate = 90 breaths/minute.  Body weight =5.4 kg. "Sippsy's" gait and hydration status were normal.  However, she was very depressed.  She was experiencing some respiratory distress.  Lung sounds were decreased ventrally.  Abdominal palpation and neurological examination seemed fine. 

Laboratory Findings:   Leukocytosis (25,300 cells); neutrophilia (22,300).  Regenerative anemia (RBC's = 3,320,000/uL; reticulocytes = 162,680/uL).   PCV = 24%.  Platelets are normal at 233,000/uL.  Glucose = 168 mg/dl.   Calcium = 8.6 mg/dl.  Total Protein = 4.7 Gm/dl.  Cholesterol = 122 mg/dl.  Sodium = 132 meq/L.  Potassium = 3.6 meq/L.  Chloride = 97 meq/L.

Thoracic Radiographs:

 165148-1.jpg (53470 bytes)

165148-2.jpg (43014 bytes)

Questions:   

Answers and Discussion:

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Copyright Wayne E. Wingfield, DVM and Brenda McClelland, DVM, Colorado State University, 1999. All rights reserved.
This page was last edited:  12/14/99