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Catheter (Greek: to let down) is a flexible sterile tube inserted into a body cavity to introduce or withdraw fluid.
Examples:
intravenous catheter - can be used to withdraw blood or infuse medication/fluids.
urethral catheter - tube inserted into the bladder to drain urine.
cardiac catheter - visualization and treatment of coronary problems.
toposcopic catheter - delivers chemotherapy to specific sites.
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Arthrocentesis is the medical term meaning aspiration of fluid from a joint.
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synovial fluid
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Edematous
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Hydrocephalus
