RIU 436 Lecture Notes - Lecture 46: Basilar Artery, Foramen Magnum, Vertebral Artery

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amethystbear941

14 Dec 2020

School

GVSU

Department

Radiation and Imaging - Ultrasound

Course

RIU 436

Professor

Miram Teft

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Document Summary

In the presence of an occluded extracranial ica, the contralateral cerebral circulation can route collateral flow to the affected side via the: anterior communicating artery. 23. match the following tcd applications with the appropriate description: sickle cell anemia: serial monitoring in children to prevent stroke, vasospasm: detects arterial changes post subarachnoid hemorrhage, collateral flow assessment: detects change in flow direction secondary to occlusion. Approach (cranial window), sample volume depth, direction of flow relative to us transducer, spatial relationship of one artery to another, flow velocity. Carotid duplex reveals long segments of stenosis secondary to circumferential wall thickening. 28. the following are symptoms of vertebrobasilar insufficiency except: amaurosis fugax. A 50 year old male with a history of non- hodgkin"s lymphoma treated with radiation presents in the vascular lab with neurological changes. Fibromuscular dysplasia: a 45 year- old female presents with neurologic symptoms.

Related Questions

â Question Number 7

"1.) Calculate the pressure at the end of a hose if it is 3 m belowthe bottom of a bucket flled with water to a height of .25 m abovethe bottome of the bucket.

2.) Given two hydraulic cylinders connected by a 5 mm hose onemeter long. The bore diameter of cylinder one is 25 mm and the borediameter of cylinder two is 75 mm. If a force of 30N is applied tocylinder one, how much mass can cylinder two support?

3.) Given a body at 50 degrees C with a surface area of 0.15 meterssquared and an emissivity of 0.7, calculate the rate of radiantenergy leaving the body.

4.) If a bus is moving toward you at a velocity of 60 km/hr, youare moving away from it at 3 m/s, what will be the observedfrequency of its horn if it is 700 Hertz at rest? The velocity ofsound is 320 m/s.

5.) What is the beat frequency of mixing three tuning forks, one at762 hertz, one at 767 and one at 770 hertz?

6.) What is the decibel level of a sound with an intensity of 2.3 X10 w/exponent -10 w/m squared?"

An 8-g iron ball bearing initally at a temperature T = 50o C is dropped into a large (assume infinite) bucket of water at T = 10o C.

1)
Approximately how much energy flows into the water from the bearing before an equilibrium temperature is reached? (Iron has an atomic weight = 56 g/mole.)

18 J
60 J
140 J
820 J
2700 J

2)
Compare the time t50->40 needed to cool the bearing from 50o C to 40o C, with time t20->10 needed to cool from 20o C to 10o C.

t50->40 < t20->10
t50->40 = t20->10
t50->40 > t20->10

3)Say that a solid glass window conducted heat away from your house at a rate of 1 W on a cold day. If you used a window twice as thick, twice as wide, and twice as high, what would be the heat loss through the window?
1/2 W
1 W
2 W

4)
Two perfume bottles are opened in a very still room (neglect all air turbulence). Assume the molecules from perfume A have molecular weight 130 g/mole; the perfume B molecules have 200 g/mole. Under the assumption that the molecules have approximately the same mean-free path (e.g., they are approximately the same size), compare the times tA and tB for the two perfumes to diffuse to the edges of the room.

tA = 0.65 tB
tA = 0.81 tB
tA = tB
tA = 1.24 tB
tA = 1.54 tB

5)
What is the chance that for 30 random spins, 29 will be up?

1/30
30 / 230
29 / 600
(29/900) / 230
none of the above

RIU 436 Lecture Notes - Lecture 46: Basilar Artery, Foramen Magnum, Vertebral Artery

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