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Pulmonary questions from HW (no manual assignment)
Terms in this set (22)
How many lobes are in the left lung
The left lung has 2 lobes the upper and lower
How many lobes are in the right lung?
The right lung has 3 lobe are the upper, middle, and lower.
Pulmonary Blood flow in a normal patient is ________ in the lung within the lower lobes.
Pulmonary Blood flow in a normal patient is greater in the lung within the lower lobes.
How many parts make-up a VQ scan? And Name them
It is made up of two parts, they are the Ventilation and perfusion imaging.
What is the most common indication for a VQ scan?
The most common indication is the possibility of a pulmonary embolism
What does COPD mean?
This stands for "Chronic obstructive pulmonary disease"
What does PE mean?
It means pulmonary embolism
Where do most PE's originate?
They usually originate from deep veins from the leg
Name 7 conditions or choices that increase a patient's risk for a PE
-Inactivity for a long period of time
-Women who use birth control
-Recent heart attack or a stroke
-Pregnancy and postpartum
-Fractured femur or hip
-Cancer or chronic lung disease
Name 5 symptoms of a PE
-Shortness of breath
Name 2 radiopharmaceuticals used for ventilation lung imaging and describe the difference.
The two radiopharmaceuticals used are Xe133 and 99mTc-DTPA. Xe133 is a gas and 99mTc-DTPAis an aerosol. 99mTc-DTPA requires the patient to use a nebulizer. The Xe133 needs a negative pressurized room in order to prevent the gas from accumulating in the room. 99mTC-DTPA does not require a specialized room, the drawback is that contamination is more common
What is the typical dose for the radiopharmaceuticals listed in the above question?
-Xe133 calls for a dose of 10-20 mCi.mTc
-DTPA calls for a dose of 30-50 mC
What are the 3 phases of a Xe133 lung ventilation scan?
The first phase is "single breath with Xe-133 only".
The second phase is "Equilibrium wash in Xe-133 and oxygen."
The third phase is "wash-out room air
What is the name of the radiopharmaceutical for a lung perfusion scan?
The name is of this radiopharmaceutical is 99mTc-MAA.
What is the typical dose?
The range is 1-6 mCi, however the typical dose is 3 mCi.
How is the perfusion dose administered?
The dose is administered via a straight stick
Is there any reason to reduce a dose or not perform the lung perfusion scan?
If a patient has pulmonary hypertension then it is advised to have a smaller dose to have fewer particulates. If a patient has severe pulmonary hypertension then this could be a reason to not useTc99m MAA.
What views are typically obtained for a lung perfusion scan?
There are eight views typically obtained which are the following:-Anterior-Posterior-
Left posterior oblique-Right posterior oblique
-Left anterior oblique-Right anterior oblique
-Right lateral -Left lateral
What additional exam is required within 24 hours of a lung scan (preferably prior to VQ)?
A chest X-ray is required within 24 hours of a lung scan
How does a "high probability" scan appear on our images?
For a high probability scan we would see two or more large perfusion defects while not seeingthese same abnormalities on a ventilation or X-ray. We may see 2 or more moderate perfusiondefects without matching ventilation or X-ray abnormalities and one large defect. Anotherpossibility is four or more moderate perfusion defects without ventilation or X-ray abnormalitiesshown.
How does a Normal lung scan appear?
A normal lung image will look symmetrical, the left and right will be uniform.
What is your communication role during a lung ventilation scan?
Our role regarding communication is to articulate to the patient what is being done during this procedure, it's in our interest to have the patient trust us and to be as mentally at ease as possible .We will instruct the patient that the doctor will advise on the results of the ventilation scan
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