transudate
Passive membrane leakage
Transudate is fluid that passes through a membrane or tissue, typically accumulating where it shouldn't.
In medicine, it describes fluid that seeps into body cavities due to pressure imbalances rather than inflammation—distinguishing it from exudate, which results from injury or infection.
The pleural transudate indicated heart failure rather than pneumonia.
edema
Abnormal tissue enlargement
- effusionUnrestrained emotional discharge
- pittingForming small cavities
- water retentionBody storing excess fluid
- congestionExcessive accumulation causing blockage
fluid
Of thin, watery secretion
- clearWithout obstruction or fog
- straw-coloredPale yellowish-brown hue
- wateryContaining excess liquid
- noninflammatoryNot provoking immune response
sterile · pale yellow · thin · acellular · physiologic
mechanism
Protein-driven fluid retention
- albuminBlood and egg protein
- semipermeable membraneBarrier allowing selective passage
- osmosisSolvent crossing semipermeable barrier
- pressure gradientSpatial variation in force
pathology
Abdominal cavity fluid accumulation
- congestive heart failureHeart too weak to pump
- cirrhosisIrreversible hepatic scarring
- liver diseaseIllness affecting blood-filtering organ
- heart failureInadequate blood pumping condition
swelling
Abnormal tissue enlargement
- effusionUnrestrained emotional discharge
- pittingForming small cavities
- water retentionBody storing excess fluid
serous
Of thin, watery secretion
- clearWithout obstruction or fog
- straw-coloredPale yellowish-brown hue
- wateryContaining excess liquid
noninflammatory · sterile · pale yellow · thin · acellular · physiologic
oncotic pressure
Protein-driven fluid retention
- albuminBlood and egg protein
- semipermeable membraneBarrier allowing selective passage
- osmosisSolvent crossing semipermeable barrier
ascites
Abdominal cavity fluid accumulation
- congestive heart failureHeart too weak to pump
- cirrhosisIrreversible hepatic scarring
- liver diseaseIllness affecting blood-filtering organ