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What your result means

Low

Your cat's PT is slightly short — usually not clinically significant.

A shortened PT can occur with sample handling. It is rarely indicative of a problem.

What to do:

No action needed unless other clotting abnormalities are present.

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Feline PT: 6.5 seconds (Low)

Normal

Your cat's prothrombin time is normal.

PT is normal for cats. This indicates the extrinsic clotting pathway is functioning correctly.

What to do:

No action needed.

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Feline PT: 9.0 seconds

High

Your cat's PT is prolonged — possible Vitamin K deficiency or liver disease.

Prolonged PT in cats is most commonly associated with rodenticide poisoning (anticoagulant ingestion), liver disease (hepatic lipidosis, cholangiohepatitis), or Vitamin K deficiency from bile duct obstruction.

What to do:

Immediate veterinary evaluation is needed. If rodenticide poisoning is suspected, Vitamin K1 therapy is life-saving. Liver function tests (ALT, ALP, bilirubin) should be performed.

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Feline PT: 14 seconds (High, Prolonged)

Pet Clotting

Prothrombin Time — Feline

Also known as:PTProtime

Reference Range

Critical Low

seconds

Reference Range

7-12

seconds

Critical High

>16

seconds

What this test measures

PT is normal for cats. This indicates the extrinsic clotting pathway is functioning correctly.

What your result means

Low

Your cat's PT is slightly short — usually not clinically significant.

A shortened PT can occur with sample handling. It is rarely indicative of a problem.

What to do:

No action needed unless other clotting abnormalities are present.

Show lab quote format

Feline PT: 6.5 seconds (Low)

Normal

Your cat's prothrombin time is normal.

PT is normal for cats. This indicates the extrinsic clotting pathway is functioning correctly.

What to do:

No action needed.

Show lab quote format

Feline PT: 9.0 seconds

High

Your cat's PT is prolonged — possible Vitamin K deficiency or liver disease.

What to do:

Immediate veterinary evaluation is needed. If rodenticide poisoning is suspected, Vitamin K1 therapy is life-saving. Liver function tests (ALT, ALP, bilirubin) should be performed.

Show lab quote format

Feline PT: 14 seconds (High, Prolonged)

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