FINALS - Ch. 48 Flashcards
(33 cards)
What supplies are needed to perform an evacuated blood collection?
Double pointed needle, plastic holder, and collection tube
What does leaving the tourniquet on the arm for an extended period of time will cause what?
Hemoconcentration
Capillary puncture is used:
when you need only a very small amount of blood
What is the correct position of the tourniquet when using an evacuated tube system?
Midway between the elbow and the shoulder
What is the preferred site for venipuncture?
Median cubital vein
What is a characteristic of capillary puncture?
The patient’s non-dominated hand is used for this procedure
What results in a flat line on the ECG tracing?
Detached/loose wire
The instrument that measures and displays the electrical impulses responsible for the cardiac cycle
Electrocardiograph
Which precordial electrode is placed in the fourth intercostal space to the left of the sternum?
V2
Which precordial electrode is placed in the firth intercostal space, where it intersects an imaginary line drawn straight down the middle of the clavicle?
V4
If a lead does not appear on an ECG tracing, what step should be taken before repeating the tracing?
Reconnect the wire
What is used to assess the electrical activity of a patient’s heart over a 24-hour period of normal activity?
Ambulatory monitoring
What would be included in the patient’s instructions regarding ambulatory monitoring?
Instruct the patient to record all activities, emotions, symptoms, and medications taken
What represents the time it takes for the ventricles to contract and recover, or repolarize?
Q-T interval
What represents the time between contraction of the ventricles and recovery?
S-T segment
What refers to the contraction of the ventricles following depolarization?
QRS complex
What position can a patient be placed in if they are uncomfortable lying flat on the examining table for an ECG test?
Fowlers position
What sends out electrical impulses to initiate depolarization
SA node
What is the first step in collecting blood?
Review the written request
The procedure by which blood is withdrawn from a vein is called:
Venipuncture
What type of venipuncture equipment is most effective when drawing blood from a patient with thin or fragile veins?
Butterfly or syringe and needle
What tests require the use of a blood collection tube with a gray stopper?
Blood glucose tests
The portion of the blood volume that includes red blood cells, white blood cells, and platelets
Formed elements
A chemical that forms a gel-like barrier between serum and the clot in a coagulated blood specimen
Serum separator
