Exam 1 Mosby Flashcards
Average range for activated PTT
25-35 seconds
- used for screening in invasive procedures
The acronym CTDI is used to describe
CT dose index is used to quantify the radiation dose received by the Pt during CT
General s/s of shock
- rapid breathing
- tachycardia
- hypOtension
- weak pulse
- pallor
- cyanosis
- cold clammy skin
Non-ionic contrast names
Iopamidol (isovue)
Iohexol (omnipaque)
Iopromide (ultravist)
Used to measure Pt dose from CT scan
Ionization chamber
Complete cardiac diastole corresponds to which portion of the cardiac cycle on an EKG
T wave
Effective dose accounts for
The type of tissue that radiation is deposited in.
Unit of measurement is Sv (sievert)
Common routes of parental medication administration
Intramuscular
Intravenous
Intradermal
Subcutaneous
What does LOCM stand for?
Low osmolar contrast media
Omni, isovue, optiray
IOCM meaning
ISO-osmolar contrast media
Iodixanol (visipaque)
Radiation exposure and it’s potentially harmful effects have a relationship that is termed ________ in nature
Stochastic
Effect that has no threshold dose but increases in probability with increasing dose
Stochastic effect
Like cancer or genetic mutations
Radiation dose index calculation that takes into account the variations in absorption across the field of view due to beam hardening
CTDIw
Components of a comprehensive CT stroke management protocol typically includes
Pre contrast sequence of brain
CTA brain and carotid
CT perfusion (CTP) of brain
Simple cysts have an average attenuation value of
0 to +20 HU
primarily water
The arterial phase of a hepatic contrast enhancement occurs as approx
25-35 seconds
The abdominal aorta bifurcates at the level of
L4
During a spiral or helical CT, the scanner acquires data
Continuously as the patient travels through the the gantry
In the form of a complete volumetric data
Which phase of renal contrast enhancement best demonstrates transitional cell carcinoma of the bladder?
Excretory
Delay of 3-15 minutes
The right lateral decub position is often used to differentiate what
The pancreatic head and the duodenum
The still viable ischemic cerebral tissue that surrounds the infarct core in a PT with an acure stroke is termed the
Ischemic penumbra
Diffuse fatty infiltration of the hepatic parenchyma may be referred to as
Steatosis
This phase demonstrates optimal enhancement of the renal cortex with maximum differentiation of the cortex from the renal medulla
Corticomedullary phase
30-40 seconds after contrast initiation
Routine CT head should have the gantry angled
15° above the IOML
