??   Investigations � Tests & Scans

Tests & Scans

Understand the blood tests, urine tests, imaging scans and other diagnostic investigations your doctor orders � what each test involves, what it measures, and what the results mean.

????? Dr. Seneth Gajasinghe � MBBS (Col) � MD (Col)
?? A Sineth Hospitals Health Education Project

Why Understanding Investigations Helps

When your doctor orders a test, understanding what it is and what it measures reduces anxiety, helps you prepare appropriately, and enables you to understand your results and ask the right questions.

Health Education by Sineth Hospitals explains the most common investigations used in clinical practice � from routine blood tests to advanced imaging � in clear, accessible English.

??   Important: Test results should always be interpreted by your doctor in the context of your full clinical picture. This information is for education only.
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Laboratory Tests
Blood, urine and other lab tests � what they measure, normal reference ranges and what abnormal results may indicate.
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Imaging (X-ray, CT, MRI)
How imaging investigations work, what they show, and how they help doctors diagnose conditions.
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Reading Results
Understanding reference ranges, High/Low/Normal flags and what your results mean in plain English.

Investigation Articles

Select an investigation below and read the full article.

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Full Blood Count (FBC)
Laboratory � Haematology
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FBS Test (Fasting Blood Sugar)
Laboratory � Endocrine � Diabetes
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How Many Hours to Fast for FBS Test? (8-10 Hours Explained)
Laboratory � Endocrine � Diabetes Screening � FBS Preparation
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FBS vs PPBS: What�s the Difference?
Laboratory � Endocrine � Diabetes Screening � Blood Sugar Tests
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AST (SGOT) & ALT (SGPT) Tests
Laboratory � Liver Health � Liver Function Test
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Serum Creatinine Test Explained
Laboratory � Kidney Function � Renal Profile
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High Creatinine, eGFR & Kidney Function
Laboratory � Kidney Function � Creatinine Results
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eGFR Explained: Kidney Function & CKD Stages
Laboratory � Kidney Function � CKD Stages � eGFR Calculator
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High AST & ALT (SGOT/SGPT): Causes and Levels
Laboratory � Liver Health � Elevated Liver Enzymes
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PPBS Test (Postprandial Blood Sugar)
Laboratory � Endocrine � Diabetes
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PPBS in Pregnancy
Laboratory � Antenatal Care � Gestational Diabetes
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3 PPBS Test (Full-Day Blood Sugar Profile)
Laboratory � Endocrine � Diabetes Monitoring
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Blood Sugar Series Test
Laboratory � Endocrine � Diabetes Monitoring
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OGTT (Oral Glucose Tolerance Test)
Laboratory � Endocrine � Diabetes � Gestational Diabetes
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Liver Function Test (LFT)
Laboratory � Hepatic
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Renal Function Test (RFT)
Laboratory � Renal
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Chest X-Ray
Imaging � Radiology
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Ultrasound Scan
Imaging � Radiology
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MRI Scan
Imaging � Radiology
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CT Scan
Imaging � Radiology
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ECG (Electrocardiogram)
Cardiac Investigations
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Echocardiogram (Echo)
Cardiac Investigations
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Urine Full Report (UFR)
Laboratory � Renal
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Biopsy
Histopathology
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Pulmonary Function Test (PFT)
Respiratory
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HbA1c Test (Glycated Haemoglobin)
Laboratory � Endocrine � Diabetes Monitoring
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Normal Blood Sugar Levels: Complete Guide (mg/dL & mmol/L)
Laboratory � Endocrine � Diabetes � Prediabetes � Reference Ranges
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Blood Culture
Laboratory � Microbiology
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Lipid Profile
Laboratory � Cardiovascular
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Endoscopy
Gastrointestinal
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Thyroid Function Test (TFT)
Laboratory � Endocrine
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Dr. Seneth Gajasinghe
Expert Contributor to All Articles
MBBS (Col) � MD (Col) � SLMC No. 27329
All articles on Health Education are created with the expert input and medical oversight of Dr. Seneth Gajasinghe. As an SLMC-registered doctor, he ensures the accuracy, quality and clinical relevance of every article on this platform.
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A Sineth Hospitals Health Education Project
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Medical Disclaimer
The information on this website is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or a qualified healthcare provider for personalised medical advice.