Pancreatic lipase (cPL, fPL) in cats and dogs
This test measures lipase made by the pancreas, using antibodies against the canine (cPL) or feline (fPL) enzyme. Unlike total lipase and amylase, it does not react with lipases from other organs, which makes it the most specific blood test for pancreatitis. Still, it is one piece of the diagnosis: vets combine it with signs, ultrasound and other results.
What it shows
Pancreatic lipase immunoreactivity (PLI) tests use antibodies that recognise the pancreatic enzyme of one species: cPL for dogs, fPL for cats. The quantitative laboratory versions from IDEXX are called Spec cPL and Spec fPL and give a number in µg/L. The in-clinic SNAP cPL and SNAP fPL tests give only “normal” or “abnormal”: the sample spot is compared with a reference spot, and a spot as dark as the reference or darker is abnormal.
Dogs and cats have separate rows because the antibodies and cut-offs differ; eClinPath notes that cats have lower pancreatic lipase immunoreactivity than dogs. IDEXX also offers an in-clinic Catalyst Pancreatic Lipase test. It is a DGGR-based activity method that reports in U/L; IDEXX aligned its numbers with the Spec bands, but it is a different measurement from Spec cPL/fPL in µg/L.
Higher than reference — what it may be a sign of
- Pancreatitis, acute or chronic: a result in the “consistent with pancreatitis” band together with matching signs supports the diagnosis.
- Pancreatic inflammation without signs: IDEXX guidance says an abnormal result in a clinically healthy dog makes subclinical pancreatitis likely and suggests close monitoring and a recheck.
- Concurrent disease: for an abnormal result in a sick cat, IDEXX suggests checking for inflammatory bowel disease, hepatitis, hepatic lipidosis and diabetes. Cornell describes pancreatitis in cats together with chronic intestinal disease, liver or gallbladder disease and diabetes.
A result in the middle, equivocal band means pancreatitis is possible. For cats IDEXX recommends looking for other diseases and rechecking in 2–3 weeks; for dogs eClinPath also recommends retesting.
Lower than reference
A result in the lowest band makes pancreatitis unlikely, though not impossible. Cornell warns that fPL can miss mild or chronic pancreatitis, especially the rapid SNAP version, and eClinPath notes that cats with chronic pancreatitis frequently have fPL within the range. A low pancreatic lipase is not used to diagnose exocrine pancreatic insufficiency; Merck describes trypsin-like immunoreactivity (TLI) as the test for that.
Look at together with
- Lipase and amylase — less specific: kidney, gut or liver conditions can raise them.
- Triglycerides — in dogs severe hypertriglyceridemia is a risk factor for pancreatitis.
- Glucose — chronic pancreatitis can lead to diabetes (Merck, IDEXX).
- ALT and bilirubin — in cats pancreatitis often comes with liver disease.
- Abdominal ultrasound — IDEXX suggests imaging when other findings point to pancreatitis but the lipase result does not confirm it.
Units and conversion
Spec cPL and Spec fPL are reported in µg/L (мкг/л on Russian forms); some labs write ng/mL, which is numerically the same — 1 ng/mL equals 1 µg/L. SNAP tests give no number at all, only normal or abnormal. In the app each row keeps the unit printed on the form.
Reference range
The reference range is on your lab’s form, and for these tests the form may also print how to interpret the result. The figures below are the test manufacturer’s (IDEXX) and literature cut-offs. IDEXX documents use three bands for Spec cPL in dogs: up to 200 µg/L, 201–399 µg/L, and 400 µg/L or more. eClinPath, citing published studies, reads below 200 as not compatible with pancreatitis, 200–400 as equivocal with retesting recommended, and above 400 as compatible with pancreatitis. For Spec fPL in cats IDEXX updated its interpretation in July 2023: up to 4.4 µg/L normal, 4.5–8.8 µg/L equivocal, 8.9 µg/L or more consistent with pancreatitis. eClinPath still cites older study cut-offs (above 5.4 µg/L compatible, 3.6–5.4 equivocal); IDEXX notes the method itself did not change.
Cats and dogs
In cats Spec fPL is especially important, because total lipase and amylase are of little use for the feline pancreas. Signs are vague: Cornell lists lethargy and reduced appetite as the most common, vomiting or weight loss in about half of cats, and abdominal pain in only about 10–30%. Pancreatitis in cats often goes together with liver and intestinal disease, a combination Merck calls triaditis.
In dogs IDEXX material by Steiner and Cridge calls Spec cPL the most specific assay for pancreatic lipase. A negative SNAP cPL is described there as a good rule-out test, and a positive one is followed by Spec cPL to confirm and to set a baseline for monitoring. Merck notes that Miniature Schnauzers are dramatically overrepresented among dogs with pancreatitis and that dietary indiscretion is believed to be a common risk factor.
Add a lab form — Pet Tracker Space recognises the lines, keeps the form’s units and draws each indicator over time with your lab’s reference band.
Sources
- IDEXX — Service Update to the Spec fPL Test Reference Intervals (2023)
- IDEXX — Catalyst Pancreatic Lipase Test (white paper)
- IDEXX — SNAP cPL Test: reference laboratory accuracy pet-side (white paper)
- IDEXX — Guidelines on utilizing the feline and canine pancreas-specific lipase tests
- Steiner J, Cridge H. Acute Pancreatitis — Diagnosis & Management. IDEXX
- eClinPath (Cornell University College of Veterinary Medicine) — Lipase
- Cornell Feline Health Center — Feline Pancreatitis
- Steiner JM. Pancreatitis in Dogs and Cats. Merck Veterinary Manual
This page explains what a lab value means. It is not a diagnosis and not a substitute for your veterinarian — only they can interpret results for your pet.