Edema

Question 1

What are the 4 causes of edema … like you havent seen this question before..

Answer 1

Pressure changes

• increased hydrostatic pressure
• decreased oncotic pressure

Obstruction of flow

• venous
• lymphatic

Question 2

What can lead to incresed capillary permeability??

Answer 2

Vasculitis (infectious/immune mediated) 
Trauma 
Endotoxemia 
Hypersensitivity 
Topical courterirritants

Question 3

Common causes of increased capillary hydrostatic pressure??

Answer 3

CHF

Thrombosis

Question 4

Cause of decreased capillary oncotic pressure

Answer 4

Hypoproteinemia

• decreased production
• increased loss
• hemodilution

Eg CHF, renal dz, too much fluid therapy

Question 5

How does large amounts of fluid within the interstitium affect drainage my lymphatics ??

Answer 5

Lymphatics have thin walls —> collapse

Decreased drainage/outflow

Question 6

How do you classify an edema?

Answer 6

Localized/generalized
- if localized is is symmetric or asymmetric

Inflammatory/ not

Question 7

DDX for generalized, non-inflammatory edema??

Answer 7

CHF

Question 8

DDX for generalized, inflammatory edema ?

Answer 8

Vasculitis (infectious/ immune mediated)

Endotoxemia

Hypersensitivity ??

Question 9

DDX for localized non-inflammatory edema??

Answer 9

Stocking up —> horse confined to stall, decreased movement causes lack of pumping action of blood from the frog and fat pad under the hoof —> edema at the pastern

Thrombosis

Hypoproteinemia

Question 10

DDX for localized inflammatory edema??

Answer 10

Trauma