Labs & Normal Values Flashcards
Normal WBC Count
4,000-11,000/uL
Normal % HCT (Male, Female)
Male 40-52%
Female 35-45%
Normal Hgb Count (Male, Female)
M: 13-17 g/dL
F: 11-15 g/dL
What does MCHC (Mean Cell Hemoglobin Concentration) tell us?
What’s the normal value?
The average concentration of hemoglobin in a given volume of blood
Normal: 32-36 g/dL
Normal Reticulocyte Count
45,000-110,000/uL
Normal RBC Count
4-6 million
Platelet Count
135,000-371,000/uL
What does (Mean Cell/Corpuscular Volume) MCV tell us? What's the Normal Value?
The average volume (size) of a RBC.
Normal:80-100 fL
How can you calculate %Hct (Hematocrit)?
%HCT = Hgb x 3 OR %HCT = (volume RBC / volume total blood) x 100
What does Red Cell Distribution Width (RDW) Tell you?
What’s the Normal Value (Male, Female)?
Measure of the range of variation in red blood cell size.
Male: 12-14%
Female: 12-16%
How do you calculate the life span of a RBC?
(50,000uL / patient absolute retic count ) x 100
If a retic count is lower than ____uL or ___% it could indicate a problem with bone marrow production.
50,000uL or 1 %
T or F: Children have a higher retic count than adults.
True.
Child: 2-6% retic
Adult: 0.5-2.5% retic
What does Prothrombin (PT) time tell you?
What’s the Normal Value?
The time it takes for blood to coagulate via the EXTRINSIC pathway (Factor VII)
Normal: 11 to 12.5 seconds
What does Activated Partial Thromboplastin Time (aPTT) tell you?
What’s the Normal Value?
The time it takes for blood to coagulate via the INTRINSIC pathway (Factors XII, XI, IX, VIII)
Normal: 30 to 40 seconds
What does the International Normalized Ratio (INR) tell you?
What’s the normal Value?
INR is a standardized version of prothrombin time, which measures the time it takes for your blood to clot.
Normal: 0.8 to 1.1
What is the goal range for INR when using warfarin or heparin?
2 - 3
What does Thrombin Time (TT) tell you?
What’s the normal value?
Measure the time it takes for a clot to form in the blood plasma when a thrombin activator is added.
Normal: 12 to 14 seconds
How does a Mixing Study wprk and tell you?
A mixing study mixes patient plasma with normal plasma in a 1:1 ratio to determine if there is a deficiency of a clotting factor or an inhibitor present in the patients plasma.
If the clotting time of a patient’s plasma is corrected after a mixing study, what does that tell you? What if it’s not corrected?
Corrected - Pt plasma is deficient in a clotting factor
Uncorrected - Pt plasma has an inhibitor present
What does a Platelet Function Assay tell you (PFA-100)? What does it tell you when it’s abnormal?
PFA-100 shows you the time it takes for blood to clot in the prescene of ADP or epinephrine.
If the test is abnormal you have some type of platelet defect (ie. vWD)
