Diagnostic tests are crucial in any aspect of clinical practice since they assist clinicians in the establishment and determination of the patient’s condition.

Nurses are often tasked of patient preparation and specimen collection during these diagnostic procedures. It is of utmost importance that nurses are knowledgeable about the different procedures and their values and results to make informed clinical decisions.

To assist nurses, here are the common laboratory values listed in an organized and easy-to-understand cheat sheet table. You can also use it for your NCLEX!

Download

Use the link below to download the PDF file of this Laboratory and Diagnostic Procedures cheat sheet. Print it using a US Legal Size (8.5″x14″) paper.

Common Laboratory Values

Value Normal Range Unit
COMPLETE BLOOD COUNT
Red Blood Cell (RBC) M: 4.5—5.5
F: 4.0—4.9
x105/ml
White Blood Cell (WBC) 4,500—10,000 cells/mcL
Platelets 100,000—450,000 cells/mcL
Hemoglobin (Hgb) M: 13.5—16.5
F: 12.0—15.0
Pregnant: 10—15
g/dL
Hematocrit (Hct) M: 41—50%
F: 36—44%
Mean Corpuscular Volume (MCV) 80—100 fL
DIFFERENTIAL COUNT
Neutrophils 54—62%
Eosinophils 1—3%
Basophils 0—0.75%
Lymphocytes 25—33%
Monocytes 3—7%
SERUM ELECTROLYTES
Sodium (Na+) 135—145 mEq/L
Potassium (K+) 3.5—5.5 mEq/L
Chloride (Cl-) 95—105 mEq/L
Calcium 8.5—10.9 mEq/L
Calcium, ionized 2.24—2.46 mEq/L
Magnesium (Mg) 1.5—2.5 mEq/L
Phosphorus (P) 2.5—4.5 mEq/L
URINALYSIS
Volume 1,000—2,000 mL/day
30 mL/hour
Specific Gravity 1.010—1.020
pH 4.5—8
Casts 1—2 per high power field
Glucose none
Protein none
Uric Acid F: 3.5—7.2
M: 2.6—6.0
mg/dL
CHEMISTRY VALUES
Glucose Adults: 70—110 mg/dL
Blood Urea Nitrogen (BUN) Adults: 7—18
Child: 5—20
Infant: 5—15
mg/dL
Serum Creatinine 0.6—1.35 mg/dL
Creatinine Clearance (CrCl) F: 85—132
M: 90—138
mL/min
Albumin 3.4—5.0 g/dL
Bilirubin <1.0 mg/dL
Uric Acid 3.5—7.5 mg/dL
Creatine phosphokinase (CPK) 21—198 units/L
COAGULATION STUDIES
Prothrombin Time (PT) 11—14 seconds
Partial Thromboplastin Time (PTT) 25—35 seconds
International Normalized Ratio (INR) 0.8—1.2
Activated Partial Thromboplastin Time (aPTT) 1.5—2.5
Fibrinogen 203—377 mg/dL
Bleeding time 1—6 mins
LIPOPROTEINS AND TRIGLYCERIDES
Total Cholesterol Ideal: below 200
Borderline: 200—240
High: above 240
mg/dL
Low Density Lipoprotein (LDL) <70 mg/dL
High Density Lipoprotein (HDL) <60 mg/dL
Triglycerides Normal: below 150
Borderline high: 150—199
High: 200—499
Very high: above 500
mg/dL
SGOT (AST) <35 IU/L
SGPT (ALT) <35 IU/L
CARDIAC MARKERS
Troponin (CTN-1 or CTN-T) Normal I: 0.03
Critical level I: above 1.5
Critical level T: 0.2
ng/L
C-reactive protein Below 0.8 mg/dL
CD40 Ligand 1.51—5.35 mg/L
Creatinine Kinase (CK-MB) 0—3 mcg/L
ARTERIAL BLOOD GAS
pH 7.35—7.45
Partial Pressure of CO2 (pCO2) 35—45 mmHg
Partial Pressure of O2 (pO2) 80—100 mmHg
Bicarbonate (HCO3) 22—26 mEq/L
Base Excess (BE) -2—+2 mEq/L
Oxygen Saturation (SaO2) 95—100%
THYROID FUNCTION STUDIES
Thyroid-Stimulating Hormone (TSH) Adults: 0.2—5.4
Neonate: 3—20
mU/L
Thyroxine (Total T4) Adult: 5.4—11.5
Child: 6.4—13.3
mcg/dL
Free Thyroxine (Total T4 F4) Adult: 0.7—2.0 ng/dL
Thyroid-Binding Globulin (TBG) Male: 15—30
Female: 11.5—32.2
Pregnancy
1st Trimester: 19.8—64.7
2nd Trimester: 41.4—63.9
3rd Trimester: 31.0—73.6
mcg/dL
Triiodothyronine (Total T3) 75—200 ng/dL
Free Triiodothyronine (FT3) 260—480 pg/dL
Thyroglobulin (Tg) Antibody 5—25 ng/mL
TUMOR MARKERS
CA 19-9 Tumor Markers <37 U/mL
CA 27.29 Above 38 Uml
CA 15.3 Above 22 Uml
CA 125 0—35 Uml
Carcinoembryonic Antigen (CEA) Above 5 ng/mL
THERAPEUTIC SERUM DRUG LEVELS
Carbamazepine (Tegretol) 4—10 mcg/mL
Digoxin (Lanoxin) 0.8—2.0 ng/mL
Lithium (Eskalith) 0.8—1.5 mEq/L
Phenobarbital (Solfoton) 15—40 mcg/mL
Theophylline (Aminophylline) 10—20 mcg/mL
Valproic Acid (Depakene) 50—100 mcg/mL

See Also

LEAVE A REPLY