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This information is provided by
Provet for educational purposes only.
You should seek the advice of your
veterinarian if your pet is ill as only he or she can correctly advise on the
diagnosis and recommend the treatment that is most appropriate for your pet. Description
The normal reference ranges for plasma inorganic phosphate
are as follows :
- Dog (adults) 0.8-1.66mmol/l (1.4-2.9mEq/l ; 2.5-5 mg/dl)
- Dogs under 1 year age 1.6-3.2 mmol/l (2.9-5.8mEq/l ; 5-10 mg/dl)
- Cats (all ages) 1.3-2.6 mmol/l (2.3-4.7 mEq/l ; 4-8 mg/dl
Blood phosphate concentrations increase under a variety of
circumstances including :
- Renal failure. Both chronic renal failure and acute renal failure
result in decreased excretion of phosphorus. In addition there is
stimulation of parathyroid hormone activity which increases both
phosphorus and calcium release from the skeleton.
- In familial renal diseases such as Fanconi Syndrome and renal cortical
hypoplasia.
- Rupture of the bladder - due to a failure to eliminate phosphorus from
the body.
- Nutritional secondary hyperparathyroidism - due to a high meat or offal
ration which is low in calcium content.
- Hypervitaminosis D - following oversupplementation
- Primary hyperparathyroidism
- Destructive primary or secondary bone tumours
- Feline hyperthyroidism
- Feline hypoadrenocorticism (rare)
- Acromegaly in female dogs
Pitfalls
- False positives - young dogs under 1 year of age.
- Errors due to haemolysis of the blood sample
Last updated : January 2016
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