Advanced Liver Health Basic

This test measures cholesterol levels in peritoneal dialysate fluid, the fluid used during peritoneal dialysis treatment for kidney disease. Cholesterol in dialysate can indicate peritoneal membrane problems or nutritional issues in dialysis patients. While not a standard screening test for cardiovascular risk, it provides information specific to dialysis adequacy and peritoneal membrane function. Elevated levels may suggest membrane changes or metabolic complications.

Sodium (Na+) is an essential electrolyte measured primarily in blood serum or plasma. It plays a critical role in fluid balance, nerve impulse transmission, and muscle contraction. Serum sodium is one of the most commonly ordered laboratory tests, included in both the Basic and Comprehensive Metabolic Panels. Abnormal levels indicate conditions ranging from dehydration and kidney disease to hormonal imbalances. Sodium can also be measured in urine (to evaluate renal sodium handling) and stool (to differentiate causes of diarrhea).

This test measures iron concentration in liver tissue, typically obtained through biopsy. Liver iron assessment is used to diagnose and monitor hemochromatosis (iron overload) and cirrhosis. Elevated liver iron indicates excessive iron accumulation, which damages the liver and other organs, causing fibrosis, cirrhosis, and increased disease risk. Iron measurement helps distinguish iron-related liver disease from other causes and guides chelation or phlebotomy treatment.

Eosinophils are a type of white blood cell involved in allergic and parasitic responses. This test examines sputum (phlegm coughed up from lungs) under a microscope to detect eosinophils. Elevated sputum eosinophils suggest eosinophilic airway inflammation, which may indicate asthma, eosinophilic bronchitis, parasitic infections, or allergic conditions. This test helps diagnose conditions causing chronic cough and guides treatment selection.

This test measures glucose concentration in peritoneal dialysate fluid, the solution used during peritoneal dialysis for kidney failure. Glucose naturally diffuses from the dialysate into the bloodstream during treatment, and measuring residual glucose helps assess dialysate dwell time and treatment effectiveness. Changes in dialysate glucose levels can indicate peritoneal membrane changes or absorption problems affecting dialysis adequacy and treatment outcomes.

Chloride is an electrolyte essential for fluid balance, nerve signaling, and muscle function. This test measures chloride in peritoneal fluid (fluid around abdominal organs), which helps evaluate conditions affecting the abdomen such as peritonitis, ascites, or organ dysfunction. Abnormal chloride levels in peritoneal fluid can indicate infection, inflammation, or metabolic disturbances requiring medical attention.

Potassium is a vital electrolyte that regulates heart rhythm, muscle function, and fluid balance. Blood potassium testing is one of the most commonly ordered laboratory tests, included in both the Basic and Comprehensive Metabolic Panels. Hypokalemia (low potassium) can result from diuretic use, vomiting, or diarrhea and may cause muscle weakness, cramps, and dangerous cardiac arrhythmias. Hyperkalemia (high potassium) may result from kidney disease, certain medications (ACE inhibitors, potassium-sparing diuretics), or tissue damage. Both extremes require prompt clinical intervention due to life-threatening cardiac risks.

Globulins are proteins produced by the immune system and liver that function in immunity and nutrient transport. When measured in body fluids, globulin levels help assess immune function and protein status in specific body compartments. Elevated globulins in fluids like cerebrospinal or peritoneal fluid may indicate infection, inflammation, or immune-related conditions, while low levels could suggest nutritional deficiency or immune suppression.

Basophils are immune cells that release histamine and other chemicals during allergic reactions and inflammation. This test measures basophil counts in synovial fluid (joint fluid), which helps diagnose joint inflammatory conditions like rheumatoid arthritis, gout, or septic arthritis. Elevated basophils in joint fluid indicate inflammation or immune response in the joint. Results guide diagnosis and treatment of joint disease.

Carbon dioxide (CO2) in blood, measured as bicarbonate, is crucial for acid-base balance and respiration. This test assesses how well your lungs remove CO2 and how well your kidneys regulate acid balance. Elevated CO2 suggests respiratory problems or metabolic alkalosis, while low CO2 may indicate hyperventilation or metabolic acidosis. Results help diagnose breathing disorders, kidney disease, and serious metabolic imbalances affecting multiple organ systems.

Albumin is a protein produced by the liver and normally found in very small amounts in body fluids like urine. Microalbumin testing detects trace levels of albumin in urine that aren't visible on standard tests. The presence of albumin in urine—called albuminuria—is an early warning sign of kidney damage. This can result from diabetes, high blood pressure, or other kidney disease. Regular albumin screening helps detect kidney problems before significant damage occurs, allowing for early intervention and management to slow or prevent progression.

Creatinine is a waste product produced by muscle metabolism and filtered by the kidneys into urine. This test measures creatinine in an 8-hour urine collection and reflects kidney filtration function. Creatinine levels help assess kidney health and are often used to calculate glomerular filtration rate (GFR), which indicates how well your kidneys filter waste. Low creatinine output may suggest reduced muscle mass or kidney disease, while the ratio of protein to creatinine helps assess kidney protein loss. This test is frequently ordered in patients with diabetes, high blood pressure, or known kidney disease.

Neutrophils are infection-fighting white blood cells. This test counts neutrophils in pleural fluid (fluid surrounding the lungs) to evaluate lung and pleural conditions. Elevated neutrophils in pleural fluid suggest infection, inflammation, or malignancy affecting the lungs or pleural lining. The test also notes that elevated neutrophils in prostatic secretions may indicate prostate inflammation or prostatitis. Analysis of pleural fluid composition, including neutrophil count, helps diagnose pneumonia with effusion, empyema (infected fluid), or other serious lung conditions requiring urgent treatment.

Bilirubin is a yellowish compound produced when your body breaks down old red blood cells. When measured in pericardial fluid (fluid around the heart), elevated bilirubin can indicate liver disease, hemolysis (breakdown of red blood cells), or bile duct obstruction. It can also reflect pericardial inflammation or infection. This specialized test helps diagnose serious cardiac and metabolic conditions affecting the tissue surrounding your heart.

Lactate dehydrogenase (LDH) is an enzyme found throughout your body that helps break down glucose for energy. When LDH appears in urine, it may indicate kidney damage, urinary tract infection, or muscle injury. Elevated urine LDH can also suggest hemolysis (breakdown of red blood cells) or certain cancers affecting the urinary system. This test is less commonly used than blood LDH but provides additional clinical information when kidney or muscle damage is suspected.

White blood cells (WBCs or leukocytes) are immune cells that fight infections and protect your body. This test measures WBC count in synovial fluid (fluid surrounding joints). Elevated WBC in joint fluid suggests infection, inflammation, or autoimmune disease affecting that joint. Very high counts may indicate septic arthritis (bacterial infection), while moderate elevation could indicate rheumatoid arthritis or other inflammatory joint conditions. This specialized test helps diagnose the cause of joint pain or swelling.

Platelets are small blood cells essential for blood clotting and preventing excessive bleeding. This blood test counts the number of platelets circulating in your bloodstream. Low platelet counts (thrombocytopenia) increase bleeding risk, while high counts (thrombocytosis) may indicate clotting risks or underlying disease. Platelet counts are affected by bone marrow disorders, medications, infections, and autoimmune diseases. This is a routine test included in complete blood counts to assess clotting function and overall blood health.

Monocytes are large white blood cells that help fight infections and clear damaged tissue. This specialized test counts monocytes in pericardial fluid (fluid around the heart). Elevated monocyte counts in pericardial fluid may indicate pericarditis (inflammation of the heart lining), infection, or autoimmune disease affecting the heart. This test helps diagnose serious cardiac conditions and inflammatory states. Results are interpreted alongside other fluid analysis tests for comprehensive cardiac assessment.

Red blood cells (erythrocytes) are the oxygen-carrying cells in your blood. This automated test counts the number of red blood cells in synovial fluid (joint fluid), which is abnormal since red blood cells should not be present in joints. Elevated RBC counts in joint fluid may indicate joint injury, bleeding into the joint, or traumatic arthrocentesis (needle puncture during fluid collection). This result helps differentiate between inflammatory and non-inflammatory joint conditions.

Calcium is an essential mineral critical for bone health, muscle function, nerve signaling, and blood clotting. This test measures calcium levels in serum or plasma, reflecting overall calcium balance in the body. About 99% of calcium is stored in bones, while the remaining 1% circulates in the blood and is tightly regulated. Abnormal serum calcium may indicate parathyroid disorders, vitamin D deficiency, kidney disease, or certain malignancies. Both hypocalcemia (low calcium) and hypercalcemia (high calcium) can cause serious symptoms including muscle cramps, cardiac arrhythmias, and neurological changes.

Alkaline phosphatase (ALP) is an enzyme found in bones, liver, and intestines. It plays a role in bone formation and bile production. This test measures ALP levels to assess bone metabolism and liver function. Elevated ALP can indicate bone disease (osteoporosis, fractures, or Paget's disease), liver disease, or bile duct obstruction. Low levels are less common but may suggest nutritional deficiencies or genetic conditions. ALP is often part of routine health screening or organ function assessment.

Urea nitrogen in urine reflects protein metabolism and kidney function. This test, typically performed on 12-hour or 24-hour urine collections, measures how much nitrogen from protein breakdown is excreted daily. Abnormal levels can indicate dietary protein intake changes, kidney disease, liver dysfunction, or metabolic disorders. The test helps assess protein metabolism, evaluate kidney function, and monitor nutritional status in patients with various metabolic or renal conditions.

Gamma-glutamyl transferase (GGT) is an enzyme involved in amino acid metabolism. Urine GGT levels reflect kidney function and may indicate kidney disease or metabolic disorders. Elevated urinary GGT can suggest kidney tubular damage, certain genetic metabolic disorders, or systemic conditions affecting the kidneys. This enzyme is also found in the liver, so combined with liver function tests, it can help identify liver and kidney disease. Urine GGT testing is less common than serum testing but provides information about kidney-specific enzyme activity.

Zinc protoporphyrin (ZPP) is formed when zinc substitutes for iron in the hemoglobin production pathway. Elevated blood ZPP levels indicate iron deficiency or lead poisoning, as both interfere with normal hemoglobin synthesis. This test is particularly useful in occupational health screening and detecting iron deficiency anemia. ZPP rises before hemoglobin drops significantly, making it a sensitive early indicator of iron problems. The test is quick, non-invasive, and widely used in pediatric lead screening programs.

Aspartate aminotransferase (AST) is an enzyme found primarily in liver and muscle cells. When cells are damaged, AST leaks into the bloodstream where it can be measured. Elevated AST suggests liver damage from hepatitis, cirrhosis, fatty liver disease, or alcohol use, but can also reflect muscle injury from trauma, intense exercise, or heart attack. AST is typically ordered alongside other liver enzymes (ALT, alkaline phosphatase) to assess liver function. Moderate elevations may be temporary and benign, but persistent elevation requires investigation to identify the underlying cause.

This test measures transferrin, an iron-transport protein, in urine. Normally, transferrin does not appear in significant amounts in urine because it's too large to filter through healthy kidneys. Elevated urinary transferrin suggests kidney damage or a glomerular filtration problem, as the protein is 'leaking' into urine. This finding may indicate early kidney disease, diabetes complications, or other renal conditions requiring further evaluation.

Ferritin is a protein that stores iron in your body. A blood ferritin test measures iron storage levels and is a key marker of iron metabolism. Elevated ferritin may indicate iron overload, hemochromatosis, inflammation, liver disease, or certain cancers. Low ferritin suggests iron deficiency, which can cause anemia, fatigue, and weakness. This test helps diagnose both iron deficiency and iron overload conditions.

Mean sphered cell volume measures the average size of red blood cells when treated under standardized laboratory conditions. This specialized test provides information about red blood cell shape and hydration status, helping diagnose hemolytic anemias and hereditary conditions affecting RBC structure like spherocytosis. Abnormal values suggest specific types of anemia or blood disorders requiring further investigation and targeted treatment.

Hemoglobin is the iron-containing protein in red blood cells that carries oxygen throughout your body. A hemoglobin test measures the total amount of hemoglobin in blood, revealing whether you have anemia (too little) or polycythemia (too much). Low hemoglobin causes fatigue, shortness of breath, and weakness, while high levels can increase clot risk. This is one of the most common tests in clinical medicine and a core part of the complete blood count.

Alanine aminotransferase (ALT) is an enzyme found primarily in liver cells that leaks into the bloodstream when liver tissue is damaged or inflamed. This blood test measures ALT levels to assess liver health and detect conditions like hepatitis, fatty liver disease, cirrhosis, or medication-related liver injury. Elevated ALT typically indicates liver damage or disease, while normal levels suggest the liver is functioning properly. ALT is often part of routine health screening and is essential for monitoring patients taking medications known to affect the liver.

This confirmatory urine test detects the presence of benzodiazepines, a class of sedative medications used to treat anxiety, insomnia, and seizures. The 'confirm method' uses advanced laboratory techniques (such as mass spectrometry) to definitively identify benzodiazepines, rather than screening tests that may give false positives. This test is used in clinical settings to verify medication use, monitor compliance with prescribed benzodiazepines, and in forensic or occupational health contexts to detect unauthorized use. It provides a reliable, specific identification of benzodiazepine presence.

This test detects IgE antibodies against brewer's yeast proteins, indicating a potential yeast allergy. Brewer's yeast is used in fermented foods and beverages including beer, wine, and some breads. A positive result suggests you may experience allergic symptoms—ranging from mild itching or hives to gastrointestinal symptoms—after consuming yeast-containing foods. This test helps identify yeast as an allergy trigger, useful for those with suspected yeast sensitivity.

This advanced test measures the proportion of cholesterol carried by HDL 3c, a specific subtype of HDL (good cholesterol). HDL particles vary in size and density; larger HDL particles are considered more protective against heart disease. By analyzing the cholesterol distribution within HDL subclasses, this test provides detailed insight into the quality of your HDL, which may offer a more nuanced picture of cardiovascular risk than standard HDL testing alone.

C-reactive protein (CRP) is an acute-phase protein produced by the liver in response to inflammation. Measured in serum or plasma, CRP is one of the most widely used markers of systemic inflammation. It rises rapidly (within hours) in response to bacterial infections, autoimmune flares, tissue injury, and malignancy. High-sensitivity CRP (hs-CRP) at lower levels is used for cardiovascular risk stratification. CRP is valuable for monitoring treatment response in rheumatologic conditions, infections, and post-surgical recovery. Unlike ESR, CRP responds quickly to changes in inflammatory status.

This test identifies specific mutations in the EGFR (epidermal growth factor receptor) gene from blood or tissue samples. EGFR mutations are commonly found in certain lung cancers and can determine which targeted therapies will be most effective. Different mutations respond differently to specific medications called EGFR inhibitors. Testing for EGFR mutations is crucial for cancer patients to guide treatment selection, predict drug response, and optimize outcomes. This genetic information helps oncologists personalize cancer treatment plans.

This urine test measures the ratio of albumin to globulin proteins. Albumin is normally filtered minimally by healthy kidneys, while globulin appears in urine in very small amounts. An elevated albumin-to-globulin ratio in urine may indicate early kidney damage or diabetes-related kidney disease. Proteinuria (excess urinary protein) is an early warning sign of kidney dysfunction and cardiovascular risk. Monitoring this ratio helps track kidney health and response to treatment for diabetes or hypertension.

Prealbumin, also called transthyretin, is a protein synthesized by the liver that transports thyroxine and retinol-binding protein. It has a short half-life (2-3 days), making it a sensitive marker of recent nutritional status and liver synthetic function. Low prealbumin levels indicate protein malnutrition, inadequate caloric intake, or liver disease. High levels are less common but can occur in kidney disease or dehydration. Prealbumin is particularly useful for monitoring nutritional interventions and recovery in hospitalized patients.

The erythrocyte sedimentation rate (ESR) measures how quickly red blood cells settle in a test tube over one hour. This simple test reflects inflammation levels in your body. Elevated ESR can indicate infections, autoimmune diseases, inflammatory conditions, or certain cancers. Low ESR is less common but may occur with blood disorders. ESR is often used alongside other tests to diagnose or monitor chronic inflammatory conditions, though it's not specific to any single disease.

Nucleated red blood cells (nRBCs) are immature RBCs that normally exit the bone marrow and mature before circulating in your blood. The presence of nucleated RBCs in peripheral blood is abnormal and suggests bone marrow stress or disease. This can indicate severe anemia, leukemia, infection, hemolysis, or other serious conditions. Finding nucleated RBCs on a blood smear typically warrants further investigation to identify the underlying cause.

This specialized blood gas measurement indicates the partial pressure of oxygen (pO2) at which hemoglobin reaches 50% saturation—a value that reflects hemoglobin's oxygen-carrying efficiency. This adjusted measurement helps assess how readily hemoglobin releases oxygen to tissues. Abnormal values may indicate lung disease, heart conditions, altitude-related changes, or hemoglobin abnormalities. This test is primarily used in clinical settings for respiratory and critical care assessment.

This test measures the proportion of cholesterol in HDL 3a particles relative to total HDL cholesterol. HDL subfractions—including the smaller HDL 3a particles—have different cardiovascular protective effects. HDL 3a particles are generally smaller and less cardioprotective than larger HDL 2 particles. This ratio provides insight into HDL quality and particle composition, which may offer additional cardiovascular risk assessment beyond traditional HDL cholesterol levels.

Band form neutrophils (bands) are immature white blood cells released from the bone marrow into the bloodstream in response to acute infection or inflammation. An elevated band count, known as a "left shift," is a hallmark of bacterial infection and sepsis. Bands are counted as part of the manual differential on a complete blood count (CBC). Their presence signals the body's urgent demand for neutrophils and is one of the SIRS criteria used in critical care. Monitoring band counts helps track infection severity and response to antibiotic therapy.

Lymphocytes are a type of white blood cell crucial for the adaptive immune response, including B cells (which produce antibodies), T cells (which coordinate and carry out cell-mediated immunity), and NK cells (natural killer cells). This blood test counts lymphocytes as part of the complete blood count with differential. Elevated lymphocyte counts (lymphocytosis) may suggest viral infections, certain leukemias, or autoimmune conditions. Low lymphocyte counts (lymphopenia) can indicate immunodeficiency, bone marrow disorders, or the effects of immunosuppressive therapies.

Non-HDL cholesterol represents all cholesterol particles except beneficial HDL cholesterol, including LDL and other atherogenic particles that contribute to plaque buildup in arteries. Unlike total cholesterol, non-HDL is considered a better predictor of cardiovascular risk because it measures the 'bad' cholesterol more accurately. Elevated non-HDL cholesterol increases risk of heart attack and stroke, particularly in people with high triglycerides or metabolic syndrome. Managing non-HDL through diet, exercise, and sometimes medication is important for heart health.

Iron binding capacity measures the amount of iron that can be carried by transferrin, a protein in blood that transports iron throughout the body. This test is part of iron metabolism assessment and helps evaluate iron stores and absorption. Elevated iron binding capacity may suggest iron deficiency, while low levels can indicate iron overload or chronic disease. Understanding iron binding capacity alongside other iron markers (ferritin, serum iron) provides a complete picture of iron status, which is essential for energy production, oxygen transport, and immune function.

Myelocytes are immature white blood cells normally found in bone marrow. Their presence in body fluids such as blood, pleural fluid, or peritoneal fluid is abnormal and may indicate serious conditions. Myelocytes in body fluids can suggest leukemia, severe infection, or other hematologic disorders. The number and type of myelocytes detected helps establish a diagnosis. This test is typically ordered when other findings suggest a blood cell disorder and requires interpretation alongside other cell counts and clinical findings.

EGFR (epidermal growth factor receptor) is a gene that, when mutated, can drive certain lung cancers and other malignancies. This test analyzes blood or tissue samples for specific EGFR mutations. Detecting these mutations is critical for patients with non-small cell lung cancer because it determines eligibility for targeted therapy drugs (like erlotinib or gefitinib) that specifically block the mutated EGFR protein. These targeted treatments are often more effective and better tolerated than traditional chemotherapy. This is a molecular diagnostic test that informs personalized cancer treatment strategies.

Blasts are immature blood or bone marrow cells. Finding them in body fluids (blood, joint fluid, pleural fluid, etc.) is abnormal and concerning. In healthy individuals, blasts should not appear in body fluids—they should remain in bone marrow and blood. Their presence may indicate leukemia, other blood cancers, or malignant invasion into body cavities. This is a quantitative test that counts the number of blasts, which helps assess disease severity. Further testing and specialist evaluation are essential if blasts are detected.

Except when measured by differential light absorption, direct bilirubin included glucuronidated and albumin bound (delta) bilirubin; Method can be WET CHEMISTRY or DRY SLIDE (TBIL-Bu)

Mitochondria antibodies (anti-mitochondrial antibodies) are proteins your immune system produces that mistakenly attack mitochondria, the energy-producing structures in your cells. This test detects these antibodies in the blood. The presence of mitochondria antibodies is a hallmark of primary biliary cholangitis (PBC), a rare autoimmune liver disease where the immune system damages bile ducts. This test helps diagnose PBC and related autoimmune liver conditions, even in early stages before significant symptoms appear.

Promyelocytes are immature white blood cells normally found in bone marrow, not in body fluids like blood or joint fluid. Detecting promyelocytes in body fluids is abnormal and may indicate serious conditions such as leukemia, particularly acute promyelocytic leukemia (APL), or leukostasis. The presence and quantity of promyelocytes helps diagnose blood cancers and assess disease severity. This finding requires urgent further investigation and specialist consultation.

This test calculates the ratio between LDL cholesterol (the 'bad' kind that builds up in arteries) and HDL cholesterol (the 'good' kind that protects your heart). Rather than looking at each individually, this ratio provides a comprehensive picture of your cardiovascular risk. A lower ratio is healthier, indicating better heart protection. This metric is often considered more predictive of heart disease risk than LDL or HDL levels alone, making it valuable for assessing overall cardiovascular health.

Therapeutic INR range (TTR) is a way of summarizing international normalized ratio (INR) control over time. This term identifies a patient's TTR when the Rosendaal method is used. The Rosendaal method uses linear interpolation to assign an INR value to each day between successive observed INR values. Gaps of greater than 56 days between INR values are not interpolated. After interpolation, the percentage of time during which the interpolated INR values lie within the target therapeutic range is calculated. The formula for TTR for a patient is: [Number of days that a patient's interpolated INR result is in therapeutic range] / [Number of days for which the patient has an interpolated INR result]. (See http://www.qualitymeasures.ahrq.gov/content.aspx?id=32739)

Metamyelocytes are immature white blood cells found in bone marrow that normally do not appear in significant numbers in body fluids. Their presence in blood, joint fluid, or other body compartments is abnormal and may indicate leukemia, severe infection, or a bone marrow disorder. This test counts metamyelocytes as part of a differential analysis in body fluid samples. Elevated levels suggest the bone marrow is releasing immature cells prematurely, which warrants further investigation.

CLSI (formerly NCCLS) document "Reference Leukocyte Differential Count (Proportional) and Evaluation of Instrumental Methods", 1992, recommend the use of variant lymphocytes rather than atypical or reactive lymphocytes.

This test measures the amount of cholesterol carried specifically by LDL (low-density lipoprotein) particles, the 'bad' cholesterol that can accumulate in artery walls. Unlike standard LDL tests, this advanced method directly measures LDL cholesterol separately from other similar particles, providing a more accurate assessment. Elevated LDL cholesterol is a key risk factor for heart disease and stroke. This test helps guide treatment decisions and monitor the effectiveness of cholesterol-lowering therapies.

The PT (prothrombin time) and aPTT (activated partial thromboplastin time) panel measures how quickly your blood clots. PT evaluates one clotting pathway, while aPTT evaluates another; together they assess your blood's overall ability to form clots. These tests are essential before surgery, for monitoring blood-thinning medications like warfarin or heparin, and for diagnosing bleeding or clotting disorders. Abnormal results may indicate liver disease, vitamin K deficiency, or inherited clotting disorders.

CD19 is a marker found on B lymphocytes, white blood cells that produce antibodies and fight infections. A CD19 cell count measures the number of B cells in your blood or bone marrow. Abnormally low CD19 counts may indicate immunodeficiency, leukemia, or complications from certain medications or treatments. Elevated counts can suggest chronic lymphocytic leukemia or other lymphoproliferative disorders. This test is particularly useful in diagnosing blood cancers and immune disorders.

This test detects IgE antibodies against egg white allergens in your blood. Egg allergy is common in children but can persist into adulthood. Reactions range from oral itching and hives to gastrointestinal symptoms and anaphylaxis in severe cases. A positive test confirms egg allergy and guides dietary avoidance of eggs and egg-containing products. Note that some individuals can tolerate cooked eggs (where proteins are altered) even if they react to raw eggs, so reactions may vary by food form.

Ceruloplasmin is a protein produced by the liver that binds and transports copper in the bloodstream. Low ceruloplasmin levels are a hallmark sign of Wilson's disease, a rare genetic disorder where copper accumulates to toxic levels in organs like the brain, liver, and eyes. Symptoms include liver disease, tremors, behavioral changes, and a characteristic golden-brown ring in the eye (Kayser-Fleischer ring). Early detection through ceruloplasmin testing is crucial because Wilson's disease is treatable with copper-reducing medications.

The PT (prothrombin time) panel measures how long it takes for your blood to clot. It specifically evaluates clotting factors involved in the extrinsic pathway, including factors affected by vitamin K and warfarin anticoagulant therapy. Results are often reported as INR (International Normalized Ratio) to standardize results across labs. Abnormal PT values may indicate bleeding disorders, liver disease, vitamin K deficiency, or problems with anticoagulant medications.

This test detects antibodies against hepatitis C virus (HCV) in blood or body fluids, indicating past or current HCV infection. The signal-to-cutoff ratio quantifies the strength of the antibody response. A positive result suggests HCV exposure, though additional confirmatory testing (like HCV RNA) is needed to confirm active infection. This test is crucial for screening blood and tissue donors and identifying infected individuals who need treatment.

INR is a standardized measurement of blood clotting time that accounts for differences between lab methods. It's essential for monitoring patients taking warfarin or other anticoagulants, as maintaining the correct INR range prevents both excessive bleeding and dangerous blood clots. INR is calculated from the prothrombin time (PT) and helps guide medication dose adjustments. A normal INR is around 1.0, but therapeutic ranges vary based on the condition being treated.

Band neutrophils are immature white blood cells released from bone marrow during stress or infection. This test measures the percentage of band neutrophils relative to total white blood cells. Elevated bands (a left shift) typically indicate acute infection, inflammation, or leukemia. Normal blood contains mostly mature segmented neutrophils; a high proportion of bands suggests the bone marrow is urgently releasing immature cells to fight infection.

Hepatitis B surface antibody (HBsAb) appears after successful vaccination or recovery from hepatitis B infection. A positive HBsAb indicates immunity to hepatitis B virus. This test is used to confirm immune response after vaccination and to assess protection status. Healthcare workers, blood donors, and others at risk are routinely tested. The presence of this antibody means you are protected against hepatitis B infection.

This test calculates the ratio of blood urea nitrogen (BUN) to creatinine, both waste products filtered by the kidneys. The ratio helps distinguish different causes of abnormal kidney function. A high ratio may suggest dehydration, excessive protein breakdown, or reduced kidney blood flow, while a low ratio can indicate liver disease or malnutrition. This ratio is more informative than either value alone in determining kidney dysfunction patterns.

Current (2011) HBV S Ag tests require confirmatory testing when positive ( see 65633-0 for new confirm test)

This qualitative test detects the presence or absence of antibodies against hepatitis C virus in blood or other body fluids. A positive result indicates current or past HCV infection and warrants confirmatory testing with HCV RNA to determine if infection is active. Hepatitis C is a serious liver infection that can lead to chronic disease, cirrhosis, and liver cancer if untreated. Early detection allows intervention before serious liver damage occurs.

GFR measures how efficiently your kidneys filter waste from blood, expressed as milliliters of filtrate per minute. It's calculated using creatinine levels adjusted for age, sex, and body size. GFR is the most accurate indicator of kidney function, with different stages indicating mild, moderate, or severe kidney disease. Even small declines in GFR can signal progressive kidney disease requiring monitoring and lifestyle modifications to slow progression.

Platelets are cell fragments essential for blood clotting and stopping bleeding. This test counts platelets in blood, with the Rees-Ecker method being a manual counting technique. Normal platelet counts range from 150,000 to 400,000 per microliter. Low platelet counts (thrombocytopenia) increase bleeding risk, while high counts (thrombocytosis) increase clot risk. Abnormal counts may indicate bone marrow disorders, autoimmune disease, infections, or medication effects.