Antenatal Profile

What Do Creatinine Levels Tell You?

• Kidney Function Marker: High blood creatinine levels (serum creatinine) indicate that the kidneys may not be working correctly.
• Estimated Glomerular Filtration Rate (eGFR): Because serum creatinine varies by muscle mass, doctors often calculate the GFR—a more accurate measure of how fast your kidneys filter blood—using the creatinine value, age, and sex.

Causes of High Creatinine Levels

Elevated creatinine does not always indicate permanent kidney disease; it can be caused by:

• Temporary Issues: Dehydration, high dietary meat consumption, or intense exercise.
• Kidney Disease/Injury: Acute kidney injury (AKI) or chronic kidney disease (CKD).
• Other Factors: Muscle disorders, injuries, and certain medications.

Causes of Low Creatinine Levels

Low levels are less common and may indicate malnutrition, severe liver disease, or conditions causing muscle loss/wasting.

Key Aspects of HIV-1/2 Antibody Testing

• Purpose: These tests determine if a person has been infected with HIV, identifying antibodies produced by the immune system.
• HIV-1 vs. HIV-2: HIV-1 is the most common type worldwide, while HIV-2 is more commonly found in West Africa and tends to progress slower.
• 4th Generation Tests: Preferred for testing, these detect both HIV antibodies and the p24 antigen, allowing for earlier detection (often within 2-6 weeks of exposure).
• Rapid Tests: These provide quick results, usually within 20 minutes, used in clinics and rapid-testing scenarios.
• Screening Procedures:
  • Reactive (Positive): Indicates HIV-1/2 antibodies were found; further testing is needed to confirm the diagnosis.
  • Non-Reactive (Negative): Indicates no antibodies were found. A follow-up test may be recommended depending on the timing of the last exposure.

When to Test

• Routine screenings are recommended for adults aged 13-64.
• Testing is critical following possible exposure (unprotected sex, shared needles).
• Symptoms such as fever, rash, swollen lymph nodes, or persistent fatigue should warrant a test.

The HCV antibody test (Anti-HCV) is a blood test that detects if your immune system has produced antibodies against the hepatitis C virus. A positive (reactive) result indicates past or present exposure to the virus but does not confirm an active infection. A positive result requires a follow-up HCV RNA confirmatory test to determine if the virus is currently active.

Key Facts About HBsAg Screening:

• Purpose: To detect and screen for HBV infection, or to monitor chronic Hepatitis B.
• Sample Type: A blood sample is taken from a vein, and results are generally available in 1-3 days.
• Testing Protocol: If positive, further tests are required to determine if the infection is new (acute) or chronic, as treatment differs for each.
• CDC Recommendation: The CDC recommends that all adults (18+) get tested for hepatitis B at least once in their lifetime.
• What it does NOT detect: A positive HBsAg test does not distinguish between acute and chronic infections on its own, nor does it indicate immunity (which is measured by the Anti-HBs / HBsAb test)

Key Aspects of the TSH Test:

• Purpose: To detect if the thyroid is overactive (hyperthyroidism) or underactive (hypothyroidism) and to monitor treatment.
• Procedure: A simple, quick blood sample drawn from a vein in the arm, usually taking less than five minutes.
• Preparation: Generally, no special preparation is required, though some medications might need to be paused, and biotin supplements should be stopped two days prior.
• Interpreting Results:
  • High TSH: Suggests an underactive thyroid (hypothyroidism), meaning the pituitary is pushing the thyroid to work harder.
  • Low TSH: Suggests an overactive thyroid (hyperthyroidism), meaning the thyroid is producing too much hormone.
• Who Should Get Tested: Those experiencing symptoms like fatigue, weight changes, rapid heart rate, or cold/heat intolerance, and those monitored for known thyroid disease.

Additional Tests: Often, if the TSH test indicates a problem, doctors will order additional tests like free T3 or T4 to further evaluate the thyroid gland's function.

Key Aspects of the Urea Test:

• Purpose: Evaluates kidney health, diagnoses kidney disease, and monitors treatments like dialysis.
• Procedure: A routine, rapid blood draw from a vein in the arm.
• High Levels (Azotemia): May indicate kidney failure, dehydration, congestive heart failure, or high protein diet.
• Low Levels: Less common, but may indicate liver disease or malnutrition.
• Associated Tests: Often paired with creatinine (BUN-to-creatinine ratio) for a more accurate assessment.

Other Types of Urea Tests:

Urea Breath Test (UBT): A completely different, non-invasive test used specifically to detect Helicobacter pylori (H. Pylori) bacteria in the stomach, which can cause ulcers.

Symptoms Indicating a Need for a Test:

• Fatigue or lack of energy.
• Swelling in hands or feet (edema).
• Reduced urine output.
• Persistent nausea or confusion.

Key Details Regarding VDRL/RPR Tests:

• Purpose: The tests screen for syphilis, a sexually transmitted infection (STI), and can monitor treatment effectiveness.
• Procedure: A blood sample is taken, usually with no special preparation required (e.g., no fasting).
• Result Interpretation:
  • Negative/Nonreactive: Usually indicates no syphilis, or that the infection is in the very early stage.
  • Positive/Reactive: Suggests a syphilis infection, but it can also be a false positive (biologic false positive) due to other illnesses (e.g., HIV, lupus, pregnancy, malaria).
• Follow-up: Positive RPR/VDRL results must be confirmed with a treponemal test, such as the FTA-ABS (Fluorescent Treponemal Antibody Absorption) test, which specifically detects antibodies to T. pallidum.

Difference Between VDRL and RPR:

• VDRL (Venereal Disease Research Laboratory): Can be used on both blood serum and cerebrospinal fluid (CSF) to diagnose neurosyphilis.
• RPR (Rapid Plasma Reagin): Generally used for blood screening; it is more automated, faster, and does not require microscopic evaluation.

Key Considerations:

• Testing Recommendations: Routine testing is recommended for pregnant women as part of prenatal care, and for sexually active individuals with multiple partners.
• Symptoms: Doctors may prescribe this test if a patient shows symptoms like sores, rashes, or fever.

Key Aspects of Hemoglobin

• Function: It is responsible for giving blood its red color and for the essential transport of gases throughout the body.
• Low Hemoglobin (Anemia): Symptoms include fatigue, weakness, dizziness, and shortness of breath. Common causes include iron deficiency, chronic diseases (kidney disease, cancer), and blood loss.
• High Hemoglobin (Polycythemia): This can result from high altitude, smoking, dehydration, or conditions like polycythemia vera.
• Normal Levels: Levels can vary by age, gender, and lifestyle.
  • Adult Men: 14-18 g/dL
  • Adult Women: 12-16 g/dL
  • Children (1-6 years): 9.5-14 g/dL
  • Pregnant Individuals: > 11g/dL

Why the Test is Done

• To check for anemia.
• To evaluate overall health (routine checkup).
• To manage chronic diseases, such as kidney disease or cancers.

Red Blood Cell (RBC) Count - Lab test

Packed Cell Volume (PCV) / Hematocrit - Lab test

Mean Corpuscular Volume (MCV) - Lab test

Mean Corpuscular Hemoglobin (MCH) - Lab test