Signalment & History
- 12-week-old rescue puppy
- Intact female
- Presumed poodle
- Screened for breed ancestry results
- Diet: Purina Pro Plan; HW Preventive: compliant; Flea/Tick Preventive: compliant; Fecal/Parasite Exam and Tx: up to date
- Routine puppy visit (Vet recommended “Genetic Screening Program”)
- Temp: 102.1 F; Pulse: 120 bpm; Respiration: 25/min; MM: pink/moist CRT: 2 sec; BCS: 4/9; Eyes: wnl; Ears: wnl; Mouth: wnl; LN’s: wnl; Cardio: Grade I heart murmur; Resp: wnl; Abd: wnl; GI: wnl; MS: wnl; CNS: wnl
What precautions should be taken when drawing blood on this dog?
- Avoid drawing blood from jugular veins. Use saphenous veins.
What does the result “20%” mean?
- This dog has 20% of the concentration of VWF that a normal dog would have compared to a 100% standard.
What is your assessment? The owner would like to schedule a spay. What would you recommend?
- von Willebrand Disease confirmed (Any result less than 50% is abnormal; <35% is at-risk for bleeding)
- Refer to clinic that has blood on hand for ovariectomy. The owner was in contact with the families that adopted his littermates and informed them that their dogs should be tested for vWD prior to surgery.
- Perform ovariectomy (rather than ovariohysterectomy) with plasma products or desmopressin acetate (DDAVP) administered pre-op. The dog should also be more closely monitored post operatively.
Learn More: Clotting Times
- Activated Clotting Time (ACT) for a dog with normal clotting capacity is approximately between 55-120 seconds for canine patients, but this depends on the type of collection tube used, the temperature, and other additional factors.
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