Pre Op Surgery Lab Test Panel
The pre-op (surgery) blood test includes the three test panels (CBC, CMP and Prothrombin Time Test) most commonly ordered before a person has surgery. Pre-operative testing is usually done during the few days before the surgery. This panel lets your surgeon know what to be aware in case of complications during surgery.
Table of Contents
This pre-op surgery lab test panel includes:
Complete Blood Count (CBC):
A CBC also helps your health professional diagnose conditions like infection, anemia, and several other disorders. Test includes: WBC, RBC, Hemoglobin, Hematocrit, MCV, MCH, MCHC, RDW, Platelets, Neutrophils, Lymphs, Monocytes, Eos, Basos, Neutrophils (Absolute), Lymphs (Absolute), Monocytes(Absolute), Eos (Absolute), Basos (Absolute), Immature Granulocytes, Immature Grans (Abs)
Comprehensive Metabolic Panel (CMP)
This panel includes:
The Serum Glucose test is how we diagnose diabetes. If the glucose is 126 on a fasting blood draw, meaning the blood was drawn first thing in the morning after an overnight fast, before you ate any breakfast, then you have diabetes. Now, that's assuming that when we repeat the test, we get the same results. It needs to be abnormal more than once.
The Uric Acid test is how we diagnose gout.
The BUN, Blood Urea Nitrogen, can be abnormal in kidney disease, dehydration, and heart failure, as well as malnutrition and liver disease.
The Serum Creatinine is a measure of kidney function. The BUN to Creatinine ratio can give information on the possible cause of the kidney dysfunction, say heart failure or dehydration or decreased kidney blood flow.
The Serum Sodium can be increased in dehydration. The Serum Sodium can be decreased in diuretic therapy and in the syndrome of inappropriate antidiuretic hormone abbreviated, SIADH. The Serum Potassium can be increased in adrenal insufficiency and acute renal failure, as well as with an inappropriate combination of medicines. Potassium could be decreased in primary aldosteronism, diuretic therapy, and renal tubular acidosis.
The Serum Chloride can be increased in dehydration and renal tubular acidosis, and it can be decreased in congestive heart failure and in primary aldosteronism. The Carbon Dioxide can be increased in primary pulmonary disease, such as severe COPD and in primary aldosteronism. It can be decreased in metabolic acidosis, such as occurs with the diabetic ketoacidosis.
The Serum Calcium can be increased in an endocrine disease called primary hyperthyroidism. It can also be increased in malignancy. However, most of the time, when a person has a high Serum Calcium found unexpectedly, it's simply due to hyperparathyroidism, which can be treated. Now, we can also have a decreased Serum Calcium in hypoparathyroidism and in vitamin D deficiency.
The Serum Phosphorus can be increased in acute or chronic renal failure and decreased in malabsorption and vitamin D deficiency.
The total Serum Protein can be increased in multiple myeloma and sarcoidosis, and it can be decreased in chronic glomerulonephritis, which is a type of chronic renal disease.
The Serum Albumin can be decreased in liver disease, cirrhosis, and in nephrotic syndrome. The total Globulin and the Albumin to Globulin ratio can be increased or decreased due to a number of causes.
The total Bilirubin can be increased in hepatitis, hemolytic anemia, and in blockage of the bile ducts, either the bile ducts within the liver or within the bile duct that drains the gallbladder and the liver. That's what we mean when we say cholestasis or biliary obstruction. The direct Bilirubin is increased in the same things as the total Bilirubin, but the ratio of direct to total gives us clues as to the causes. One of the most common causes of a mildly elevated total Bilirubin found on a routine CMP is a syndrome called Gilbert's disease. Although it's called a disease, it's common, and it doesn't cause any liver damage or any health damage.
The Alkaline Phosphatase can be increased in bone disease and liver disease and decreased in malnutrition and celiac disease.
The AST, and ALT are often called liver enzyme tests. They don't measure liver function, but rather give evidence of liver damage, but they can also be elevated in damage to other parts of the body. They can be increased in liver disease, muscle disease, pancreatitis, and excessive exercise.
Prothrombin with INR and Partial Thromboplastin Times (PTT)
These tests are usually ordered for patients prior to surgery to ensure normal clotting ability. The PT and PTT Blood Tests are useful in the diagnosis of excessive, unexplained bleeding in patients who are not taking blood-thinning medications. These bleeding disorders include conditions such as nosebleeds, bruising, heavy menstrual periods, blood in the stool and/or urine, and bleeding gums, among others.
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