OBF Flashcards
What is effusion?
Accumulation of fluid in a cavity
What are the classifications of effusion causes?
Transudate
Exudate
What causes transudate effusion related to hydrostatic pressure?
Congestive Heart Failure
What is the WBC count characteristic of exudate?
Greater than 1000/µL
What are the two types of membranes lining body cavities?
Parietal and Visceral membranes
What is the significance of pleural fluid cholesterol levels?
Helps differentiate transudate from exudate
What is colloidal or oncotic pressure’s role in serous fluid formation?
It pulls fluid back into capillaries
What are the three main cavities of the body lined by membranes?
Pleural, Pericardial, Peritoneal
What causes the small excess of fluid in serous membranes?
Different positive pressures in capillaries
What role does hydrostatic pressure play in serous fluid formation?
It helps push fluid out of capillaries
What is serous fluid an ultrafiltrate of?
Plasma
What is the normal volume of pleural fluid?
Approximately 10-20 mL
What causes transudate effusion related to oncotic pressure?
Nephrotic syndrome
What differentiates chylous from pseudochylous effusion?
Chylous is extractable in ether
What is the appearance of pericardial fluid in infection?
Clear and yellow
What is the purpose of peritoneal lavage?
To detect intra-abdominal bleeding
What is the function of synovial fluid?
Reduces friction and provides lubrication
What is synovial fluid?
Viscous fluid in movable joints
What is the procedure for collecting synovial fluid?
Arthrocentesis
How is synovial fluid characterized?
Viscous fluid in movable joints
Derived from the Latin word for egg
What is the normal viscosity of synovial fluid?
Forms a string (4-6 cm)
What is the normal protein level in synovial fluid?
Less than 3 g/dl
How does the presence of crystals in synovial fluid indicate different conditions?
Indicates gout or pseudogout based on type
What is the role of synovial fluid in joint health?
Provides lubrication and nutrients to cartilage