(1) A hollow flexible tube for insertion into a body cavity, duct, or vessel to allow the passage of fluids or distend a passageway. Its uses include the drainage of urine from the bladder through the urethra or insertion through a blood vessel into the heart for diagnostic purposes.
(2) A tubular, flexible, surgical instrument for withdrawing fluids from (or introducing fluids into) a cavity of the body, especially one for introduction into the bladder through the urethra for the withdraw of urine.
(3) A hollow, flexible tube inserted into a body cavity, duct, or vessel to allow the passage of fluids or distend a passageway; its many uses include the diagnosis of heart disorders when inserted through a blood vessel into the heart.
Angiographic catheter - one through which a contrast medium is injected for visualization of the vascular system of an organ. One through which a contrast medium is injected for visualization of the vascular system of an organ. Such catheters may have preformed ends to facilitate selective locating (as in a renal or coronary vessel) from a remote entry site. They may be named according to the site of entry and destination, such as femoral-renal and brachial-coronary.
Arterial catheter - one inserted into an artery and utilized as part of a catheter-transducer-monitor system to continuously observe the blood pressure of critically ill patients. An arterial catheter also may be inserted for x-ray studies of the arterial system and for delivery of chemotherapeutic agents directly into the arterial supply of malignant tumors.
Atherectomy catheter - one with a rotating cutter and a collecting chamber for debris, used for atherectomy and endarterectomy and inserted under radiographic guidance.
Balloon catheter - one whose tip has an inflatable balloon that holds the catheter in place or can dilate the lumen of a vessel, such as in angioplastic procedures.
Butterfly catheter - a metal needle with flexible plastic 'wings' and a short length of tubing. The 'wings' assist in placement and facilitate fixation with tape. By permission from Hall L, Clarke KW, Trim C, Veterinary Anaesthesia, Saunders, 2000
Cardiac catheter - a long, fine catheter designed for passage, usually through a peripheral blood vessel, into the chambers of the heart under radiographic control.
Cardiac catheter- microphone phonocatheter. Device similar to a conventional catheter, with a microphone at the tip.
Catheter drainage - a catheter left in place to keep the bladder drained. Preferably should have a one-way valve to avoid aspiration of air and infection.
Central venous catheter - (a) a long, fine catheter introduced via a large vein into the superior vena cava or right atrium for administration of parenteral fluids or medications or for measurement of central venous pressure. A long, fine catheter inserted into a vein for the purpose of administering through a large blood vessel parenteral fluids (as in parenteral nutrition), antibiotics and other therapeutic agents. This type of catheter is also used in the measurement of central venous pressure. See also central venous catheterization.
Column disk catheter - an indwelling device for continuous peritoneal dialysis. It is implanted within the peritoneal cavity, resting against the body wall. The attached Silastic tubing is used for infusing and draining the dialysate at intervals.
Condom catheter - an external urinary collection device that fits over the penis like a condom; used in the management of urinary incontinence.
DeLee catheter - one used to suction meconium and amniotic debris from the nasopharynx and oropharynx of neonates.
Double-channel catheter - double-lumen catheter one with two channels, one for injection and the other for fluid removal.
Double-lumen catheter - one having two channels; one for injection and one for removal of fluid.
Elbowed catheter - a urethral catheter with a sharp bend near the beak, used to get around an enlarged prostate.
Electrode catheter - a cardiac catheter containing electrodes; it may be used to pace the heart or to deliver high-energy shocks.
Female catheter - a short urethral catheter for passage through the female urethra.
Fluid-filled catheter - an intravascular catheter connected by a saline-filled tube to an external pressure transducer; used to measure intravascular pressure.
Foley catheter - an indwelling catheter retained in the bladder by a balloon inflated with air or liquid. Gouley catheter a solid, curved steel urethral catheter grooved on its inferior surface so that it can pass over a guide through a urethral stricture.
Gruentzig balloon catheter - a flexible balloon catheter with a short guidewire fixed to the tip, used for dilation of arterial stenoses.
Indwelling catheter - (a) one held in position in the urethra. (b) one especially designed so that it is held in place in the urethra for the purpose of draining urine from the bladder.
Over-the-needle catheter - a large-bore sharp needle housed with an indwelling stilette, inside a thin-walled plastic tube. An incision is made over the filled vein, the needle-cannula inserted, the stilette withdrawn, then the needle, leaving the plastic cannula in situ.
Pacing catheter - a cardiac catheter containing one or more electrodes on pacing wires; used as a temporary cardiac pacing lead.
Prostatic catheter - elbowed c. a urethral catheter with a sharp bend near the beak, used to get around an enlarged prostate
Self-retaining catheter - indwelling c. one held in position in the urethra.
snare catheter - (a) one designed to remove intracardiac catheter fragments introduced iatrogenically. (b) one constructed to remain in the bladder, effecting constant drainage.
Swan-Ganz catheter - a soft, flow-directed catheter with a balloon at the tip for measuring pulmonary arterial pressures.
Tenckhoff catheter - any of several types commonly used in peritoneal dialysis, having end and side holes and one or more extraperitoneal felt cuffs making a bacteria-tight seal.
Through-the-needle - the catheter is housed within the needle which is used to enter the blood vessel. After insertion, the needle may be removed by withdrawing, but leaving the catheter in place. A protective housing may be provided to cover the needle.
Toposcopic catheter - a miniature catheter that can pass through narrow, tortuous vessels to convey chemotherapy directly to specific sites.
Tracheal catheter - one with small holes at the terminal 1 inch, especially designed for removal of secretions during tracheal suctioning.
Two-way catheter - double-lumen c.
Ureteral catheter - one inserted into the ureter, either through the urethra and bladder or posteriorly via the kidney. (b) a long, extremely small gauge catheter designed for insertion directly into a ureter
Urethral catheter - (a) one inserted through the urethra into the urinary bladder. (b) any of various types of catheters designed for insertion via the urethra into the urinary bladder. See also catheterization.
Winged catheter a urethral catheter with two projections on the end to retain it in place.