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22 Cards in this Set
- Front
- Back
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What is percutaneous transluminal angioplasty?
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PTA employs a balloon catheter to enlarge the vessel lumen by disrupting plaque, intima & media in a controlled manner.
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What are the 3 types of PTA? (area)
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Renal, peripheral, cardiac
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Describe the catheter for a PTA
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Balloon
2 lumina -1 for gw -1 for balloon inflation Diameter 2-20mm |
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What is a stent?
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A stent is a device placed in a vessel to enlarge the lumen & provide a "scaffolding" to hold the vessel open.
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What are stents made of?
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Meshes of stainless steel or titanium alloy.
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What is the purpose of a stent?
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To improve the results of PTA
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How does a stent work?
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Resists vascular segments not opened completely by balloon & tack down intimal flaps
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What is thrombolysis
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Thrombolysis is a procedure in which the clot or thrombus is destroyed or lysed by injecting a clot-dissolving agent through a specially designed catheter.
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What is urokinase
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Most commonly used drug for thrombolysis.
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What are the 3 purposes of a nephrostomy?
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Drain an obstructed kidney or ureter
Remove a stone Infuse drugs |
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What is a percutaneous biliary drainage?
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Palliative procedure for patients with biliary duct obstruction.
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Describe internal drainage
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Catheter or stent through the common bile duct into the duodenum
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Describe external drainage
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Catheter through commone bile only, not crossing obstruction into the duodenum
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What is an abscess?
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A localized collection of pus which may occur internally or externally in any area of the body.
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What modalities are used to identify an abscess?
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CT, US, NM
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Describe a percutaneous abscess drainage
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Place catheter into abscess drain, inject CM, Leave catheter if necessary
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Describe Gastrostomy tube placement
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A tube is placed, percutaneously through te stomach into the duodenum
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What is the purpose of a gastrostomy tube placement?
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Provides long term feeding, necessitated by neurologic disorders or patients that cannot eat on their own
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What is extracorporeal shock wave lithotripsy?
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A non-invasive method used theraputically for both urolithiasis and cholelithiasis
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What is extracorporeal shock wave lithotripsy based on?
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High energy shock waves to fragment the stones without causing significant damage to the normal surrounding tissue.
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How are smaller fragments deal with?
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Dissolved by orally administered drugs, can be removed mechanically, or can be passed from the organ physiologically
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What is the purpose of a water bath?
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Provide a path for the shock waves to reach the site of the calculus
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