Egan’s Chapter 17 Exam Review – Clinical Lab Tests, CBC, WBC
Differential & Critical Values|Verified Questions with
Complete A+ Graded Rationales Latest Updated 2026
Clinical lab tests are performed to (4) :
1. Evaluate general health status
2. Identify organ dysfunction
3. Detect infection
4. Determine effects of therapy
Reference range take into account (4) :
1. Age
2. Gender
3. Race
4. Ethnicity
Result significantly outside reference range; represents pathophysiologic condition :
Critical Test Value
Common test measuring formed elements of
blood :
CBC
White blood cells :
Leukocytes
Red blood cells :
Erythrocytes
Platelets :
Thrombocytes
Determines the number of each type of WBC
present in the blood :
Differential of WBC Count
Neutrophils absolute value :
, 40% - 75%
Lymphocytes absolute value :
20% - 45%
Esinophils absolute value :
0 - 6%
Basophils absolute value :
0 - 1%
Monocytes absolute value :
2% - 10%
What two WBC's increase with an allergic reaction?
Eosinophils and Basophils
What WBC increase with an bacterial infection?
Neutrophils
Immature neutrophils :
Bands
Mature neutrophils :
Segs
WBC count above normal :
Leukocytosis
WBC below normal :
Leukopenia
Elevation of the absolute value of neutrophils :
Neutrophilia
What WBC's increase with parasites reaction?
Eosinophils
Increased with invasion of foreign material :
Differential & Critical Values|Verified Questions with
Complete A+ Graded Rationales Latest Updated 2026
Clinical lab tests are performed to (4) :
1. Evaluate general health status
2. Identify organ dysfunction
3. Detect infection
4. Determine effects of therapy
Reference range take into account (4) :
1. Age
2. Gender
3. Race
4. Ethnicity
Result significantly outside reference range; represents pathophysiologic condition :
Critical Test Value
Common test measuring formed elements of
blood :
CBC
White blood cells :
Leukocytes
Red blood cells :
Erythrocytes
Platelets :
Thrombocytes
Determines the number of each type of WBC
present in the blood :
Differential of WBC Count
Neutrophils absolute value :
, 40% - 75%
Lymphocytes absolute value :
20% - 45%
Esinophils absolute value :
0 - 6%
Basophils absolute value :
0 - 1%
Monocytes absolute value :
2% - 10%
What two WBC's increase with an allergic reaction?
Eosinophils and Basophils
What WBC increase with an bacterial infection?
Neutrophils
Immature neutrophils :
Bands
Mature neutrophils :
Segs
WBC count above normal :
Leukocytosis
WBC below normal :
Leukopenia
Elevation of the absolute value of neutrophils :
Neutrophilia
What WBC's increase with parasites reaction?
Eosinophils
Increased with invasion of foreign material :
