Exam (elaborations)
CHAPTER 3 DEWITT Questions with Correct Answers
- Module
- Institution
CHAPTER 3 DEWITT Questions with Correct Answers
[Show more]
Seller
Follow
cracker
Reviews received
Content preview
CHAPTER 3 DEWITT Questions with CorrectAnswers
TTE Correct Answer-transthoracic echocardiogram
transthoracic echocardiogram Correct Answer-non-invasive, real time
ultrasound of the heart acquired via the patients chest wall that allows us
to study the anatomy, motion, and blood flow through the heart and
great vessels.
advantages of TTE Correct Answer-minimal staff and equipment
pain free
quick
relatively inexpensive
reliable
portable
provides immediate information
TTE contraindictions Correct Answer-combative patient
interstitial air from chest trauma
morbidly obese
patient refuses the exam
ultrasound Correct Answer-a sound wave with a frequency exceeding
the upper limit of human hearing
,>20,000 herts (Hz) - the unit for cycles per second
how to achieve the highest frame rate possible Correct Answer-acquire
the region of interest with the smallest field of view.
why is depth important in ultrasound Correct Answer-decreasing the
depth decreases the time for the signal to travel to the structure and back,
this increases the frame rate
when improved magnification and resolution are needed what should
you do? Correct Answer-either decrease the depth, adjust the focus, or
utilize the zoom feature.
what does the ZOOM feature do? Correct Answer-decreases sector size,
increases line density, increases frame rate, and improves resolution.
what feature is great for taking a close look at a valve or acquiring
dimensions? Correct Answer-ZOOM feature
the ultrasound transducer is comprised of what? Correct Answer-many
piezoelectric crystals
what are the piezoelectric crystals made of? Correct Answer-lead
zirconate titanate PZT
, each PZT element ___________ and __________ the ultrasound pulses
along a ______ ______, into the chest in the shape of a _______.
Correct Answer-transmits and receives ...................... scan
line....................... beam
What field offers the best resolution? Correct Answer-Near field
what does the number of PZT elements determine? Correct Answer-
determines the number of scan lines
the more scan lines the better the _______________. Correct Answer-
resolution
each frame shows a complete set of ______ _______ therefore a
complete sweep of the ultrasound beam Correct Answer-scan lines
A matching layer within the PZT crystals and the transducer works to
____________ the ____________ ______________ between the
transducer and the skin so more ___________ is transmitted in the body.
Correct Answer-decrease the acoustic impedance..................... sound
air is not a good ____________ Correct Answer-conductor
what is a medium when referring to ultrasound Correct Answer-
ultrasonic gel
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cracker. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £12.64. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now