Lab Values Flashcards
Lab Values are used for
screening
diagnosis
monitoring
Factors affecting lab values
age, gender, race, pregnancy, food ingestion
Females and pediatric lab values are typically
less than normal
CBCs are typically ordered for
bleeding
infection
fluid status
anemia/weakness
CBC measures
RBC
Hgb
Hct
Platelet
WBC
MCV
MCH
MCHC
RDW
RBC
of red cells per mL/blood / 1mm3 of blood
- carry O2
- contains Hgb molecules
Hgb (Hemoglobin)
O2 carrying protein
Hct (Hemocrit)
packed volume of RBCs, % of total volume
MCV
Cell size (normocytic, macro and micro)
MCH
amount of hemoglobin per cell
MCHC
Hgb/Hct per 100 mL/RBCs
RDW
red cell distribution width
Platelet
of platelets per mL/blood
WBC
of white cells per mL/blood
RBC Normal values
3.89-5.40 M/uL
RBC indices
MCV
RDW
MCH
MCHC
not discussed
MCV: 80-95 fL
RDW: 11-14.5%
MCH: 27-31 pg
MCHC: 32-36 g/dL
High RBC > 5.4 M/uL
CHD
severe COPD
polycythemia vera (blood cancer)
severe dehydration
When RBC decreases more than 10% of the normal range what does the pt have?
anemia
Low RBC < 3.89
anemia
hemolytic anemia
hemorrhage
renal disease
normal pregnancy
bone marrow failure
rheumatoid arthritis, lymphoma, leukemia, Hodgkin disease, hemoglobinopathy, cirrhosis, dietary deficiency, bone marrow failure, prosthetic valves,
Hgb Normal Values
12-16 g/dL
- measurement of the total amount in blood
- connected to O2
High Hgb >16
erythrocytosis,
CHD
severe COPD,
polycythemia vera
severe dehydration
Low Hgb < 12
anemia
hemolytic anemia
hemorrhage, dietary deficiency, bone marrow failure
renal disease
normal pregnancy
prosthetic valves, rheumatoid arthritis, lymphoma, leukemia, Hodgkin disease, hemoglobinopathy, cirrhosis,
- low O2 to body tissues
How many hemoglobins are on every RBC?
4
Hct Normal Values
37-47 %
-indirect measurement of RBC number and volumes
-routine tests and anemia eval