catheter
noun
cath·e·ter
ˈka-thə-tər 
ˈkath-tər
: a tubular medical device for insertion into canals, vessels, passageways, or body cavities usually to permit injection or withdrawal of fluids or to keep a passage open compare balloon catheter
Examples of catheter in a Sentence
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During an ablation, a cardiac electrophysiologist snakes a catheter through a vein or artery, usually in the groin or the wrist, to get to the heart.
—
Nicole Villalpando, Austin American Statesman, 30 July 2025
Patients typically stay in the hospital for two to five days after surgery, and then use a catheter for a couple weeks before beginning to train their new bladder, Kukreja says.
—Angela Haupt, Time, 28 July 2025
Bruising on hands could be caused by intravenous catheters, actinic purpura from excessive sun exposure or a vasculitis.
—Judy Stone, Forbes.com, 18 July 2025
Other options include mechanochemical ablation, a medical technique that rotates wire inside a catheter to disrupt the vein lining while a sclerosant is injected, causing the vein to collapse.
—Ashleigh Fields, The Hill, 17 July 2025
See All Example Sentences for catheter
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Nicole Villalpando, Austin American Statesman, 30 July 2025
Patients typically stay in the hospital for two to five days after surgery, and then use a catheter for a couple weeks before beginning to train their new bladder, Kukreja says.
—Angela Haupt, Time, 28 July 2025
Bruising on hands could be caused by intravenous catheters, actinic purpura from excessive sun exposure or a vasculitis.
—Judy Stone, Forbes.com, 18 July 2025
Other options include mechanochemical ablation, a medical technique that rotates wire inside a catheter to disrupt the vein lining while a sclerosant is injected, causing the vein to collapse.
—Ashleigh Fields, The Hill, 17 July 2025
See All Example Sentences for catheter
Cite this Entry
“Catheter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/catheter. Accessed 7 Aug. 2025.
Copy CitationMedical Definition
catheter
noun
cath·e·ter
ˈkath-ət-ər, ˈkath-tər
: a tubular medical device for insertion into canals, vessels, passageways, or body cavities for diagnostic or therapeutic purposes (as to permit injection or withdrawal of fluids or to keep a passage open)
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