URR 71 Flashcards
(41 cards)
___ mass = high frequency transducer
superficial
Renal biopsy on obese patient = ____ transducer
low frequency curvilinear
The transducer needs to be able to penetrate well enough to see the mass, while still providing ___
acceptable resolution
The highest frequency that provides the necessary ___ and ___ should be used
penetration
far field size
Primary purpose of preliminary scan before invasive procedure
identify the target and its relationship to surrounding structures
Identifying the target and its relationship to other structures is used to determine ___, ___, ___, and ___
needle choice (length and gauge)
skin entry point
needle trajectory
tracking technique
After an invasive procedure, discard needles and biopsy device in ___
biohazardous receptacle
After an invasive procedure, soak the transducer in ____ solution for the manufacturer recommended amount of time
glutaraldehyde
1 advantage of sonography guided biopsy
real time visualization of needle passing through AOI
Advantages of Sonography Guided biopsy
minimally invasive
no radiation
accurate diagnosis in 95% cases
cost effective
prevents surgical removal of tissue
allows for multiple patient positions and approaches
portabl
disadvantages of sonography guided biopsy
isoechoic lesions
sound attenuation when evaluating deep masses in obese patients
unable to evaluate GI tract or bone lesions
situations which makes a particular treatment or procedure absolutely inadvisable
absolute contraindications
Contraindications for sonography guided procedures
known allergy to injectate
lack of appropriate equipment or skill to complete procedure
unsafe biopsy route
uncooperative patient
unmanageable coagulopathy
Uncontrolled movement by the patient during a procedure can result in ___ or ___
laceration
hemorrhage
a condition which makes a particular treatment or procedure possibly inadvisable
relative contraindications
use of blood thinners, aspirin, or antibiotics
coagulotherapy
When ___ must be injected, it can raise blood sugar levels; can be a contraindication for patients with diabetes mellitus
corticosteroids
Risk for complications with invasive procedures increases with ____ and ___
increased needle size
highly vascular organs
most common major complication of biopsy of a solid abdominal organ
hemorrhage
complications from invasive procedure
hemorrhage
pain
vasovagal response
hematoma formation
swelling
peritonitis
biloma, urinoma, or lymphocele
pneumothorax
infection
needle track seeding
death
when a tissue sample is removed, tumoral cells can be released into the blood or lymphatic system causing the formation of satellite tumors and/or metastasis
needle track seeding
All require the use of sterile technique and administration of local anesthetic at the puncture site
FNA
fine needle capillary technique
core biopsy
percuteaneous aspiration/drainage
small needle used with a syringe to draw out cells or fluid from a superficial mass; much less risk of complication than core biopsy
fine needle aspiration
With FNA, samples are evaluated by ___
cytology