Practice Exam 1 Flashcards
Active Range for activated PTT
25-35 seconds
What is PTT
partial thromboplastin time, labratory measure of blood coagulation
correct angle of insertion for butterfly needle
15 degrees
CTDI
CT Dose Index, used to quantify the radiation dose received by the patient during a CT scan
What IV contrast administration method provides the greatest overall plasma to iodine concentration
IV bolus administration
symptoms of a patient in shock
rapid breathing, tachycardia, hypotension, weak pulse, pallor, cyanosis, cold and clammy skin
what is SOLU-CORTEF classified as
corticosteroid, brand name for hydrocortisone
list of non-ionic contrast
iopamidole(isovue), iohexol(omnipaque), and iopromide(ultravist)
dyspnea
difficult breathing
Complete cardiac diastole corresponds to which portion of the cardiac cycle on an electrocardiogram (ECG)
T wave
complete cardiac diastole
the period of atrial and ventricular relaxation after heart contraction
Iodixanol (Visipaque)
non-ionic iso-osmolar
contrast induced nephrotoxicity
The potentially serious decline in renal function following the IV administration of contrast material.
effective dose
the quantity of absorbed radiation dose based on the radiosensitivity of a particular tissue type.
Units: Sievert
normal range for diastolic blood pressure
60-90
Parenteral Administration
injection of medication into the body.
common routes: intramuscular, intravenous, intradermal, subcutaneous
Stochastic Effects
no threshold dose but increases in probability with increasing dose
Enteric Precautions
Attempt to protect from the spread of infection through direct or indirect contact with fecal matter
Ionic Contrast Media
salts consisting of sodium and/or meglumine
ex:iothalamate meglumine
CTDI(W)
calculated from measurements made with dosimeters positioned at the center and periphery of a phantom and accounts for the variance in dose distribution due to the effects of beam hardening.
unit used to express the total patient dose from a helically acquired CT examination.
mGy-cm (milligrays per centimeter)
DLP: dose length product
total patient dose over a given scan acquisition length (z) also illustrated as CTDI(vol) X Scan Length
simple cysts of the kidney have average attenuation values in the range of.
CT numbers:between 0-20
contain mostly water
when does the arterial phase of hepatic contrast enhancement occur
25-35 seconds after the initiation of contrast agent administration.
Where does the abdominal aorta bifurcate
L4
On an ECG of the complete cardiac cycle, at which portion of the R-R interval is the heart muscle in diastole/
55%-75%
the accumulation of gas within a degenerating intervertebral disc is called the….
vacuum phenomenon
Spiral/Helical acquisition
obtained with the scanner continuously acquiring data as the patient travels through the ganrty
CT study of the head typically performed WITHOUT a contrast agent
to rule out subdural hematoma
phase of renal contrast enhancement the best demonstrates transitional cell carcinoma (TCC) of the bladder?
Excretory phase after a 3-15 minute delay
typical use of Right Lateral Decubitus of abdomen
used to differentiate the pancreatic head and duodenum
