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Glossary of terms

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catheter

  1. A tubular instrument to allow passage of fluid from or into a body cavity. It is often used to drain abscesses.
  2. A tube that is inserted through the urethra into the bladder to drain it of retained urine.
  3. A flexible, hollow plastic or rubber tube that may be passed into a blood vessel to withdraw fluids or inject medicine or contrast materials.

catheter angiography
An examination of blood vessels by injecting contrast material directly into an artery through a small plastic tube.

For details see the Catheter Angiography page.

catheter-directed thrombolysis
A procedure in which a catheter is inserted through the skin into a vessel and directed to a blood clot in a fistula or graft of a hemodialysis patient. A medication or mechanical device delivered via the catheter is used to break up the clot and restore blood flow. See the Catheter-directed Thrombolysis page for more details.