Serous Fluid Flashcards
All body cavities are lined by a thin membrane which has 2 parts:
Visceral membrane
Partial membrane
Is an ultra filtrate of plasma derived from the capillary network of the membrane.
Serous fluid
Formed under the influence of:
- Hydrostatic pressure
- Oncotic pressure
- Capillary permeability.
Any alteration in the rate of formation or removal can cause _______ (accumulation of fluid in the cavity)
Effusion
Causes of Effusion:
Increase hydrostatic pressure
Decreased oncotic pressure (low protein)
Lymphatic obstruction (filariasis, tumors)
MECHANISM:
•Disruption of fluid filtration & absorption
•No direct involvement of the membrane
Transudate
Cause of transudate
Congestive heart failure
Hyponatremia
MECHANISM:
•Direct involvement and injury to the membrane
Exudate
Cause of exudate
Infection and malignancy in membrane
Type of cells of transudate
Lymphocyte
Type of cells exudate
Segmenters
Color of transudate
Light yellow to straw
Color of exudate
Darker, sometimes orange red
Specific gravity of transudate
Less than 1.018
Specific gravity of exudate
More than 1.018
Orgin of transudate
Noninflammatory
Origin of exudate
Inflammatory
LDH of transudate
Less than 550 unit
LDH pf exudate
More than 550 unit
Appearance of transudate
Clear
Appearance of exudate
Cloudy
SPECIMEN COLLECTION used in pleural
Thoracentesis