Canis ISSN: 2398-2942

Blood biochemistry: ammonia

Synonym(s): NH3

Contributor(s): Kathleen P Freeman, James Simpson

Overview

  • Primarily absorbed from GI tract, especially colon. Lower levels from muscle metabolism.
  • Increased levels may be seen with impaired liver function or portosystemic shunt.
  • Used in investigation of hepatic encephalopathy Hepatic encephalopathy.

Sampling

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Tests

Availability

  • Contact commercial laboratory to confirm availability.
  • Available with some in-practice analysers.

Technique (intrinsic) limitations

  • Only significant in conjunction with other laboratory and clinical findings.

Technician (extrinsic) limitations

  • Specialized test.

Result Data

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Further Reading

Publications

Refereed papers

  • Recent references from VetMedResource and PubMed.
  • Sterczer A, Meyer H P, Boswijk H C, Rothuizen J (1999) Evaluation of ammonia measurements in dogs with two analysers in use in veterinary practiceVet Rec 144, 523-526.
  • Hitt M E & Jones B D (1986) Effects of storage, temperature and time on canine plasma ammonia concentrations. Am J Vet Res 47, 363-364.

Other sources of information

  • Ettinger S J & Feldman E C (eds) (2000) Textbook of Veterinary Internal Medicine. 5th edn. Philadelphia: W B Saunders & Co.
  • Kaneko J J, Harvey J W & Brass M L (eds) (1997) Clinical Biochemistry of Domestic Animals. 5th edn. Boston: Academic Press.
  • Duncan J R, Prasse K W & Mahaffey E A (1994) Veterinary Laboratory Medicine. Clinical Pathology. 3rd edn. Iowa: Iowa University Press.


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