Midterm Flashcards
During the venipuncture procedure, the tourniquet should stay on no longer than
1 minute
Which vein is the first choice for venipuncture?
median cubital
If you are asked to perform a venipuncture on an inpatient who is not wearing an ID band, you should
ask the patient’s nurse to attach a new ID band before proceeding
Small red spots on the skin are referred to as
petechiae
An increase in the ratio of formed elements to plasma is called
hemoconcentration
Hematomas can be caused by
removing the tourniquet after removing the needle
The following can occur if the tourniquet is left on the patient too long:
hemoconcentration
Tourniquets should be placed ____ inches above the venipuncture site.
3 to 4 inches
When should the tourniquet be removed from the arm in a venipuncture procedure?
before the needle is withdrawn
Which information must match on the patient’s ID band and the requisition?
DOB
ID number
patient’s name
At what angle should a venipuncture needle penetrate the skin?
15 to 30 degrees
Which vein lies close to the brachial artery?
basilic
Upon entering a patient’s room, you should first
introduce yourself
Which vein is often the only one that can be palpated in an obese patient?
cephalic
Which is not a purpose of the requisition?
a. filing insurance claims
b. identifying the patient
c. determining the specimens to be collected
d. allowing the equipment necessary for the collection to be gathered
filing insurance claims
Blood collected in light blue-topped tubes is used for which test?
coagulation
Blood collected in gray-topped tubes is used for which test?
FBS
Blood collection in lavender-topped tubes is used for which test?
CBC
Tubes containing the SPS anticoagulant are used for
blood culture analysis
Blood collections tubes containing an anticoagulant should be
inverted gently and repeatedly after blood collection
Blood banks use a ______ -gauge needle to collect blood from donors for transfusions
16-18
The most common gauge used for a routine venipuncture is
21
The additive sodium citrate is used in blood collection to test for
prothrombin time
The syringe method of draw is useful because
it allows for control of blood flow
it shows the appearance of blood at the hub
The smaller the gauge number, the
larger the lumen
Tubes with green tops may contain
sodium heparin
Tubes with gray tops are used for
glucose tolerance tests
EDTA prevents coagulation in blood tubes by
binding calcium
Which color-coded tube does not contain any additives?
red, glass tube
Complete clotting of a blood sample in a SST (gold or red-gray) tube takes ____ minutes at room temperature.
30 minutes
Which of the following indicates the largest-sized needle?
16g
Correct order of draw
1) yellow, sterile
2) light blue
3) red, plastic tube
4) gold BD Hemogard Closure/ red-gray (tiger top)
5) green
6) lavender
7) gray
Platelets remain in the circulation for
9 to 12 days
The main function of leukocytes is to
protect the body against infection
An average adult has ____ L of blood.
5 to 6 L
Plasma constitutes ____ % of total blood volume.
55%
Which color tube may be used to obtain serum for a laboratory test?
Red
