Lab Values

Red Blood Cells (RBCs)
Total Red Blood Cell (RBC) / Erythrocyte count
Male, 4.3 - 5.9 x 10^12/L
Female, 3.5 - 5.5 x 10^12/L
Hematocrit / Packed Cell Volume (PCV)
Male, 41 - 53%
Female, 36 - 46%
Hemoglobin (Hgb)
Male, 13.5 - 17.5 g/dL
Female, 12.0 - 16.0 g/dL
Mean Corpuscular Volume (MCV)
80 - 100 fl/cell
Mean Corpuscular Hemoglobin (MCH)
25.4 - 34.6 pg/cell
Mean Corpuscular Hemoglobin Concentration (MCHC)
31 - 36% Hb/cell
Reticulocyte count
0.5 - 1.5% of red cells
White Blood Cells (WBCs)
Total White Blood Cell (WBC) / Leukocyte count
4.5 - 11.0 x 10^9/L
Segmented Neutrophils
65 - 75%
3 - 5%
1 - 3%
0 - 0.75%
25 - 33%
3 - 7%
Platelet count
150 - 400 x 10^9/L
Bleeding time (template)
2 - 7 minutes
Prothrombin time
11 - 15 seconds
Thrombin time
<2 seconds deviation from control
Partial thromboplastin time (activated)
25 - 40 seconds
Liver Function
Serum Bilirubin (Adult)
Total, 0.1 - 1.0 mg/dL
Direct, 0.0 - 0.3 mg/dL
Aspartate Aminotransferase (AST, GOT at 30°C)
8 - 20 U/L
Alanine Aminotransferase (ALT, GPT at 30°C)
8 - 20 U/L
Phosphatase (Alkaline), Serum (p-NPP at 30°C)
20 - 70 U/L
Proteins, Serum Total (recumbent)
6.0 - 7.8 g/dL
3.5 - 5.5 g/dL
2.3 - 3.5 g/dL
Renal Function + Electrolytes
Urea Nitrogen, Serum (BUN)
7 - 18 mg/dL
Uric Acid, Serum
3.0 - 8.2 mg/dL
Creatinine, Serum
0.6 - 1.2 mg/dL
Calcium, Serum (Ca2+)
8.4 - 10.2 mg/dL
Sodium (Na+)
136 - 145 mEq/L
Chloride (Cl-)
95 - 105 mEq/L
Potassium (K+)
3.5 - 5.0 mEq/L
Magnesium (Mg2+)
1.5 - 2.0 mEq/L
Phosphorus (inorganic), Serum
3.0 - 4.5 mg/dL
Bicarbonate (HCO3-)
22 - 28 mEq/L
Endocrine Function
Thyroid-Stimulating Hormone (TSH), Serum or Plasma
0.5 - 5.0 µIU/mL
Thyroxine (T4), Serum
5 - 12 µg/dL
Triiodothyronine (T3), Serum (RIA)
115 - 190 ng/dL
Glucose, Serum (Average)
Fasting 70 - 110 mg/dL
Postprandial (>2hrs) < 140 mg/dL
Random 140 - 199 mg/dL
Hemoglobin A1C
Cholesterol, Serum
Rec:<200 mg/dL
Triglycerides, Serum
35 - 160 mg/dL
Ferritin, Serum
Male 15 - 200 ng/mL
Female 12 - 150 ng/mL
50 - 170 µg/dL
Total Iron Binding Capacity (TIBC) / Transferrin Conc.
255 - 450 µg/dL
7.35 - 7.45
33 - 45 mmHg
75 - 105 mmHg
Lactate Dehydrogenase (LDH), Serum
45 - 90 U/L
Erythrocyte Sedimentation Rate (ESR)
Male 0 - 15 mm/h
Female 0 - 20 mm/h
Creatine Kinase (CK), Serum
Male 25 - 90 U/L
Female 10 - 70 U/L
Amylase, Serum
25 - 125 U/L
Osmolality, Serum
275 - 295 mOsmol/kg

Internal Medicine


Asset 10@3x


Red Blood Cell (RBC) Disorders, White Blood Cell (WBC) Disorders, Coagulation Disorders and Hemostasis, Pancytotic Disorders


No one wants to waste time reading a preface. Neither did we want to write something that will get ignored. But this isn’t that formality.

We wrote this introduction to quickly explain to you why this course is different. In the book, ‘The Magic of Thinking Big’ author David Schwartz wrote, ‘The story is told that the great scientist Einstein was once asked how many feet are in a mile. Einstein’s reply was, “I don’t know. Why should I fill my brain with facts I can find in two minutes in any standard reference book?” Einstein taught us a big lesson. He felt it was more important to use your mind to think than to use it as a warehouse for facts.’ And then the author goes on to explain that the ability to know how to get and use information is more important than using the mind as a garage for miscellaneous facts.

Unfortunately, most question banks consist of a haphazard assortment of different questions probing for information to prepare you for the exam. But once you get responsible for patients, both you and your patient know that they rely on you for your thinking skills and Google for a quick fact check.

So based on this principle, we develop our courses in Tome Pollom. Every chapter has the concepts explained in a clear, simple, and straight-forward way. In fact, you will need little effort to understand the concepts and will be surprised how quickly and easily you can finish studying!

Our hope is that this course is going to save you time and energy (and sleep and anti-depressants and hair-loss) and much more of your valuable resources. Just see for yourself.

Nevertheless, if you feel anything needs improving from your perspective, or whether the information is unclear or wrong, every page has a ‘Send Us Your feedback’ box for your kind input. We thrive on your feedback and criticisms and we aim to improve as we go along together. So, thank you in advance.

Hope you have a productive session. Make sure you get enough sleep!

About the course

Hematology is the branch of medicine that deals with diseases of the blood and blood-forming organs. Remember, blood is a fluid connective tissue composed of two major things:
  • Plasma: 91% of which is water and the rest are salts and organic molecules (plasma proteins, glucose, amino acids, nutrients, urea.)
  • Formed elements: produced in the red bone marrow (where the hematopoietic stem cells are concentrated). They are:
    • Red blood cells (RBC)/erythrocytes – small in size but numerous (in millions per mm3)
    • White blood cells (WBC)/leukocytes – three times bigger than RBCs but less in number (in thousands per mm3).
    • Platelets – fragmented megakaryocytes (in hundreds of thousands per mm3).
Blood-related disorders mainly revolve around disorders of the formed elements RBC disorders, WBC disorders, and coagulation disorders (platelets and including coagulation proteins that are part of plasma). And almost 40% of hematology discusses RBC disorders that overall deal with signs and symptoms of anemia, like sickle cell disease (SCD), thalassemia, iron deficiency anemia (IDA) to name but a few. Furthermore, leukemias and lymphomas occupy the majority of WBC disorders, and clotting/coagulation disorders that deal with thrombocytopenia and coagulopathies. These topics may seem confusing at first glance but we’ve made every effort to discuss them simply and concisely to be as comprehensive yet easy to understand. And hopefully, with your constructive feedback, we thrive to improve even more. All the best and get enough sleep!  

What will you learn

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What our students say


Cutts Daniel

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Daniel Smith

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Katherine Cutts

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