By The Pawline veterinary teamVeterinary-reviewed by Alastair Greenway, BVM&S MRCVS · 25 July 2026
Pancreatic lipase immunoreactivity is the most specific blood test for pancreatitis, because it measures lipase made only by the pancreas — unlike the old catalytic lipase and amylase, which pick up enzymes from elsewhere. It supports the diagnosis but doesn't stand alone: imaging and clinical signs complete the picture.
Pancreatitis — inflammation of the pancreas — is common, painful, and notoriously hard to diagnose. The older blood tests for it (lipase and amylase) measure enzyme activity that can come from several tissues, so they were never reliable. Pancreatic lipase immunoreactivity solved that problem by measuring, immunologically, only the lipase the pancreas itself makes — Spec cPL in dogs, Spec fPL in cats.
Pancreatic lipase immunoreactivity measures only the lipase the pancreas makes — the most specific blood test for pancreatitis.
That specificity is what makes it the blood test of choice when pancreatitis is suspected.
Reading a high result
A markedly raised pancreatic lipase supports a diagnosis of pancreatitis, particularly in a patient with fitting signs — vomiting, abdominal pain, poor appetite, lethargy. The higher the value, the stronger the support. In practice it is often run first as an in-clinic screening version (a rapid SNAP-type test), with a quantitative laboratory result to confirm and to give a number that can be followed.
Two honest limits matter. First, it is not perfectly specific to clinical disease: mild elevations occur in some animals without clinically significant pancreatitis, including in kidney disease and other abdominal illness. Second, the degree of elevation does not map neatly onto how sick the animal is. So a raised result is read together with the clinical picture and abdominal ultrasound, and pancreatitis remains a diagnosis built from several pieces rather than one number.
Reading a normal result
A normal pancreatic lipase makes pancreatitis considerably less likely, and this rule-out value is genuinely useful in a vomiting patient — it helps redirect the search towards the gut, liver, kidneys or elsewhere. It is not absolute (very early or very focal pancreatitis can slip through), so a strongly suspicious clinical picture still warrants imaging.
In chronic disease
Pancreatitis can be recurrent or chronic, especially in cats, where it frequently accompanies inflammatory bowel disease and liver inflammation (the combination often called "triaditis"). Serial measurements can help follow flare-ups and recovery, and in chronic feline disease the pancreatic lipase is read alongside B12, folate and TLI as part of the wider gastrointestinal panel. Repeated bouts can eventually damage enough pancreatic tissue to cause exocrine insufficiency or diabetes.
Cat vs dog
The assays are species-specific — Spec cPL for dogs, Spec fPL for cats — and the correct one must be used. Clinically the species differ markedly: dogs with pancreatitis usually present acutely with vomiting and abdominal pain, whereas cats are notoriously vague, often showing only lethargy and inappetence with no vomiting at all. That vagueness is precisely why a specific blood test earns its place in feline medicine, and why feline pancreatitis is so often missed without it.
About the reference range
This page shows no range strip. Results are interpreted against assay-specific cut-offs with an equivocal "grey zone" between normal and abnormal, and Pawline draws a band only where it holds a verified interval. Read your result against the thresholds printed on your own report.
The IDEXX assay's published cut-offs, for orientation (µg/L, which equals ng/mL): Spec cPL (dog) — under 200 not consistent with pancreatitis, 200–400 elevated/equivocal (recheck), ≥400 consistent with pancreatitis. Spec fPL (cat) — note IDEXX re-set these on 12 July 2023 (Wu et al. 2023, Veterinary Clinical Pathology): the current bands are ≤4.4 normal, 4.5–8.8 equivocal (recheck in 2–3 weeks), ≥8.9 consistent with pancreatitis — the older 3.5 / 5.4 figures still circulating online are out of date. The in-clinic SNAP cPL/fPL is a yes/no version whose "abnormal" spot corresponds to the reference-lab quantitative test. These numbers are specific to the IDEXX assays; read your own report's thresholds.
What to do next
If pancreatitis is suspected, pancreatic lipase is the right blood test to ask about — but expect it to be combined with abdominal ultrasound and the clinical picture rather than used alone. A normal result is helpful for steering the search elsewhere. In cats especially, a low threshold for testing is sensible, because the signs are so easily mistaken for "just being off colour".
This page is educational and is not a diagnosis. Lab results are interpreted in the full clinical context by your veterinary surgeon; a single value rarely tells the whole story.
