While the regular glucose test is taken at a certain point in time, the glucose tolerance test involves repeated testing to determine the rate at which glucose is processed by the body. Blood gas analysis of arterial blood is primarily used to monitor carbon dioxide and oxygen levels related to pulmonary function, but is also used to measure blood pH and bicarbonate levels for certain metabolic conditions. Other specialized tests, such as the arterial blood gas test, require blood extracted from an artery.
įor the majority of tests, blood is usually obtained from the patient's vein. Some tests, such as those that measure glucose or a lipid profile, require fasting (or no food consumption) eight to twelve hours prior to the drawing of the blood sample. Tests that focus on cholesterol levels can determine LDL and HDL cholesterol levels, as well as triglyceride levels. Biochemical analysis Ī basic metabolic panel measures sodium, potassium, chloride, bicarbonate, blood urea nitrogen (BUN), magnesium, creatinine, glucose, and sometimes calcium. During venipuncture, pressure differences between the vein and the vacuum in the Vacutainer forces blood into the tube. Vacutainer tubes used in the collection of blood. Also, respiratory therapists are trained to extract arterial blood to examine arterial blood gases.
However, in special circumstances, and emergency situations, paramedics and physicians extract the blood. Phlebotomists, laboratory practitioners and nurses are those in charge of extracting blood from a patient.
In dwelling arterial, central venous and peripheral venous lines can also be used to draw blood. If only a few drops of blood are needed, a fingerstick is performed instead of a venipuncture. For these reasons, blood tests are the most commonly performed medical tests. Consequently, the state of the bloodstream affects or is affected by, many medical conditions. Blood flows throughout the body, acting as a medium that provides oxygen and nutrients to tissues and carries waste products back to the excretory systems for disposal. A venipuncture performed using a vacutainerĪ venipuncture is useful as it is a minimally invasive way to obtain cells and extracellular fluid ( plasma) from the body for analysis.
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