41. Superior vena cava syndrome Flashcards Preview

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Flashcards in 41. Superior vena cava syndrome Deck (8):
1

caused by

1. malignacy ( pancoast tumor)
2. thrombosis from indwelling catheter

2

medical emegerncy because

Can raise intracranial
pressure (if obstruction is severe) ---> headaches,
dizziness, ---> increased risk of aneurysm/rupture of
intracranial arteries.

3

pathophysiology

An obstruction of the SVC that impairs blood
drainage from the head (“facial plethora”;
note blanching after fingertip pressure in
neck (jugular venous distention), and upper
extremities (edema).

4

clinical characteristics

1.facial plethora”;
2.blanching after fingertip pressure in neck
3. (jugular venous distention),
4.upper extremities (edema).

5

• Superior vena cava syndrome is most likely caused by what?



Neoplasms and thromboses from indwelling catheters

6

• A patient with superior vena cava syndrome is rushed to the ED by his doctor. Why does the doctor consider this a major emergency?

If obstruction is severe, elevated cranial pressure may increase the risk of aneurysm formation or rupture of intracranial arteries

7

• Superior vena cava syndrome puts a patient at risk of rupture of what arteries?

Intracranial arteries, as a result of increased intracranial pressure

8

• A man with a left lung mass has headaches and dizziness. Brain angiography shows a berry aneurysm. What major vessel is blocked by the mass?

The superior vena cava (this is SVC syndrome)