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ABO Group and Rh Type

Blood typing is used to determine an individual's blood group, to establish whether a person is blood group A, B, AB, or O and whether he or she is Rh positive or Rh negative.

The Different Blood Types

There are four major blood groups and eight different blood types. Doctors call this the ABO Blood Group System.

The groups are based on whether or not you have two specific antigens -- A and B:

  • Group A has the A antigen and B antibody.
  • Group B has the B antigen and the A antibody.
  • Group AB has A and B antigens but neither A nor B antibodies.
  • Group O doesn’t have A or B antigens but has both A and B antibodies.

There’s also a third kind of antigen called the Rh factor. You either have this antigen (meaning your blood type is “Rh+” or “positive”), or you don’t (meaning your blood type is “Rh-” or “negative”). So, from the four blood groups, there are eight blood types:

  • A positive or A negative
  • B positive or B negative
  • AB positive or AB negative
  • O positive or O negative

The adiponectin ELISA assay quantitatively measures human adiponectin in serum. It has been shown that decreased expression of adiponectin correlates with insulin resistance. Adiponectin appears to be a potent insulin enhancer linking adipose tissue and whole body glucose metabolism.

Aids in the diagnosis of primary disease of skeletal muscle myocardial infarction and viral hepatitis.

Approximately 1-2% of individuals with primary hypertension have primary hyperaldosteronism characterized by hypokalemia (low potassium) and low direct renin. Because serum aldosterone concentrations vary due to dietary sodium intake and body position, some physicians prefer measurement of 24-hour urine concentration for aldosterone.

When the Total Alkaline Phosphatase activity is increased, the Isoenzymes are useful in determining the source of the increased activity.

This assay is intended for use in the assessment of risk for the development of hepatocellular carcinoma (HCC) in patients with chronic liver disease.

The major sources of amylase are the pancreas and the salivary glands. The most common cause of elevation of serum amylase is inflammation of the pancreas (pancreatitis). In acute pancreatitis, serum amylase begins to rise within 6-24 hours, remains elevated for a few days and returns to normal in 3-7 days. Other causes of elevated serum amylase are inflammation of salivary glands (mumps), biliary tract disease and bowel obstruction. Elevated serum amylase can also be seen with drugs (e.g., morphine) which constrict the pancreatic duct sphincter preventing excretion of amylase into the intestine.

Antinuclear antibodies are associated with rheumatic diseases including Systemic Lupus Erythematous (SLE), mixed connective tissue disease, Sjogren's syndrome, scleroderma, polymyositis, CREST syndrome, and neurologic SLE. 

Reflex Information: If ANA Screen, IFA is positive, then ANA Titer and Pattern will be performed at an additional charge.


Apolipoprotein A1 (APO A1) has been reported to be a better predictor than HDL cholesterol and triglycerides for Coronary Artery Disease (CAD). Low levels of APO A1 in serum are associated with increased risk of CAD. The measurement of APO A1 may be of value in identifying patients with atherosclerosis. Apolipoprotein B (APO B) has been reported to be a more powerful indicator of CAD than total cholesterol or LDL cholesterol in angiographic CAD and in survivors of myocardial infarction. In some patients with CAD, APO B is elevated even in the presence of normal LDL cholesterol.

Apolipoprotein B (APO B) has been reported to be a powerful indicator of CAD. In some patients with CAD, APO B is elevated even in the presence of normal LDL cholesterol.

BNP is increased in congestive heart failure, left ventricular hypertrophy, acute myocardial infarction, coronary angioplasty, and hypertension. Elevations are also observed in pulmonary hypertension (indicating right ventricular dysfunction), acute lung injury, hypervolemic states, chronic renal failure and cirrhosis. Decreasing levels indicate therapeutic response to anti-hypertensive therapy.

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Measurement of the levels of bilirubin is used in the diagnosis and treatment of liver, hemolytic, hematologic, and metabolic disorders, including hepatitis and gall bladder obstruction. The assessment of direct bilirubin is helpful in the differentiation of hepatic disorders. The increase in total bilirubin associated with obstructive jaundice is primarily due to the direct (conjugated) fraction. Both direct and indirect bilirubin are increased in the serum with hepatitis.

Measurement of the levels of bilirubin is used in the diagnosis and treatment of liver, hemolytic, hematologic, and metabolic disorders, including hepatitis and gall bladder obstructive disease



C-Peptide is useful in the evaluation of pancreatic beta cell function and for determining the source of insulin in patients with hyperinsulinemic hypoglycemia.

Increased CRP levels are found in inflammatory conditions including: bacterial infection, rheumatic fever, active arthritis, myocardial infarction, malignancies and in the post-operative state. This test cannot detect the relatively small elevations of CRP that are associated with increased cardiovascular risk.

C-Reactive Protein Cardiac (hs CRP) Useful in predicting risk for cardiovascular disease.


The CA 125 level can provide prognostic information in the follow-up management of patients with ovarian carcinoma. The assay should be used as an adjunctive test in the management of ovarian cancer patients. CA 125 is not recommended as a cancer screening procedure to detect cancer in the general population

CA 15-3 may be useful for monitoring patients with metastatic breast cancer and certain ovarian cancers. The CA 15-3 values from sequential samples have a high correlation with the clinical course in most patients with metastatic breast cancer.

A large percentage of patients with gastrointestinal tumors (such as pancreatic, liver, gastric, colorectal tumors) and some other malignancies have been shown to have elevated serum CA 19-9 levels. Serum CA 19-9 levels may be useful for monitoring disease activity or predicting relapse following treatment. CA 19-9 should not be used as a screening test.

The ionized calcium is determined by an ion selective electrode methodology. The result that is generated is pH adjusted. The result is empirically based on a measured pH and ionized calcium concentration normalized to a pH of 7.40. This calculation compensates for in vitro changes in pH due to loss of CO2 through specimen handling. Ionized calcium represents the true "bioavailable" calcium in the circulation. In situations where the total calcium is normal but does not fit the clinical picture, e.g., hyperparathyroidism, a determination of the ionized calcium will, many times, show an elevation in the "bioavailable" calcium component. This may be due to alterations in protein concentrations, especially albumin, that binds most of the calcium in the circulation.