Catheter, hemodialysis: A venous catheter used for hemodialysis (dialysis of the blood). A hemodialysis catheter is a type of central venous catheter. It may be inserted into the subclavian, internal jugular, or femoral veins. Subclavian catheters generally may be used for 2 to 6 weeks. Hemodialysis catheters are often for relatively short-term use because of an acute need for dialysis or because chronic dialysis is just starting.
Long-term access for hemodialysis may be provided by subcutaneous arteriovenous fistulas in which an artery (the radial artery) is surgically anastomosed (connected) to a vein (the cephalic vein). However, after this procedure is done, it takes 6 to 8 weeks for the forearm veins to dilate and arterialize to be suitable for repeated puncture and hence for long-term hemodialysis.
- Catheter, indwelling bladder
Catheter, indwelling bladder: A flexible plastic tube (a catheter) inserted into the bladder that remains (“dwells”) there to provide continuous urinary drainage. The principal type of indwelling bladder catheter is the “Foley” which has a balloon on the bladder end. After the Foley catheter is inserted in the bladder, the balloon is inflated (with air […]
- Catheter, pulmonary artery
Catheter, pulmonary artery: A light flexible balloon-tipped tube that is introduced into the pulmonary artery (the artery from the right ventricle of the heart to the lungs). See also: Catheter, Swann-Ganz.
- Catheter, Swan-Ganz
Catheter, Swan-Ganz: A style of oximetry catheter that is inserted into a major vein under the collarbone or in the neck, threaded through the right side of the heart, and then threaded into the pulmonary artery. Physicians can use monitoring equipment with a Swan-Ganz catheter to measure blood pressure inside the heart and to find […]
- Catheterization, venous
Catheterization, venous: The insertion of a tiny tube (a catheter) into a peripheral or central vein to deliver fluids or medication. This is the most frequently used method for the administration of intravenous (IV) fluids and IV meds (medications). The most common complications of venous catheterization are infiltration of fluid around the catheter, failure of […]
Cathexis: In psychiatry, the concentration of psychic energy on an idea.