Invasive blood pressure

Invasive blood pressure is a method of measuring blood pressure internally by using a sensitive IV catheter inserted into an artery. This provides a more accurate reading of the patient's current blood pressure. This is usually used where rapid variations of blood pressure are anticipated.

References ranges for blood tests (CPT 82000–84999)

Electrolytes	Sodium Potassium Chloride Calcium Renal function Creatinine Urea BUN-to-creatinine ratio Plasma osmolality Serum osmolal gap

Acid-base	Anion gap Arterial blood gas Base excess Bicarbonate CO₂ content

Iron tests	Ferritin Serum iron Transferrin saturation Total iron-binding capacity Transferrin Transferrin receptor

Hormones	ACTH stimulation test Thyroid function tests Thyroid-stimulating hormone

Metabolism	Blood lipids

Cardiovascular	Cardiac marker Troponin test CPK-MB test Lactate dehydrogenase Myoglobin Glycogen phosphorylase isoenzyme BB

Liver function tests	Proteins Human serum albumin Serum total protein ALP transaminases ALT AST AST/ALT ratio Bilirubin Unconjugated Conjugated

Pancreas	Amylase Lipase Pancreatic lipase

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