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=====Blood Gases=====
=====Blood Gases=====
A metabolic acidosis with respiratory compensation is a common abnormality seen in colic. Typical values include pH 7.3 units, PCO2 35 mmHg and HCO3- 15 mmol/L. Horses with simple obstructions may show an insignificant base excess compared to those with a strangulating obstruction showing a significant base deficit. It is important to monitor and correct the acid-base imbalances especially for horses that will undergo anethesia and surgery. Rapid deterioration in acid-base status is a poor prognostic indicator.
=====Serum/Plasma Electrolyte levels=====
Blood lactate levels are useful in determining severity of disease, and as a prognostic indicator; levels between 1-2mmol/L are considered normal, while levels above 5.7mmol/L are considered significant. "Colic scores" that combine several parameters can be relatively accurate prognostic indicators, although most laboratory tests have limited use in terms of specific diagnosis.
===Abdominocentesis===
===Abdominocentesis===