Medical tubes inserted in the body to extract or administer substances
Catheter
Catheter disassembled
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In medicine, a catheter (/ˈkæθətər/)[1] is a thin tube made from medical grade materials serving a broad range of functions. Catheters are medical devices that can be inserted in the body to treat diseases or perform a surgical procedure. Catheters are manufactured for specific applications, such as cardiovascular, urological, gastrointestinal, neurovascular and ophthalmic procedures. The process of inserting a catheter is called catheterization.
In most uses, a catheter is a thin, flexible tube (soft catheter) though catheters are available in varying levels of stiffness depending on the application. A catheter left inside the body, either temporarily or permanently, may be referred to as an "indwelling catheter" (for example, a peripherally inserted central catheter). A permanently inserted catheter may be referred to as a "permcath" (originally a trademark).
Catheters can be inserted into a body cavity, duct, or vessel, brain, skin or adipose tissue. Functionally, they allow drainage, administration of fluids or gases, access by surgical instruments, and also perform a wide variety of other tasks depending on the type of catheter.[2] Special types of catheters, also called probes, are used in preclinical or clinical research for sampling of lipophilic and hydrophilic compounds,[3] protein-bound and unbound drugs,[4][5] neurotransmitters, peptides and proteins, antibodies,[6][7][8] nanoparticles and nanocarriers, enzymes and vesicles.
^"catheter noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at". Oxfordlearnersdictionaries.com. Retrieved May 6, 2022.
^Diggery, Robert (2012). Catheters: Types, applications and potential complications (medical devices and equipment. Nova Science. ISBN 978-1621006305.
^Altendorfer-Kroath, Thomas; Schimek, Denise; Eberl, Anita; Rauter, Günther; Ratzer, Maria; Raml, Reingard; Sinner, Frank; Birngruber, Thomas (January 2019). "Comparison of cerebral Open Flow Microperfusion and Microdialysis when sampling small lipophilic and small hydrophilic substances". Journal of Neuroscience Methods. 311: 394–401. doi:10.1016/j.jneumeth.2018.09.024. ISSN 0165-0270. PMID 30266621. S2CID 52883354.
^Schaupp, L.; Ellmerer, M.; Brunner, G. A.; Wutte, A.; Sendlhofer, G.; Trajanoski, Z.; Skrabal, F.; Pieber, T. R.; Wach, P. (February 1, 1999). "Direct access to interstitial fluid in adipose tissue in humans by use of open-flow microperfusion". American Journal of Physiology. Endocrinology and Metabolism. 276 (2): E401–E408. doi:10.1152/ajpendo.1999.276.2.e401. ISSN 0193-1849. PMID 9950802.
^Ellmerer, Martin; Schaupp, Lukas; Brunner, Gernot A.; Sendlhofer, Gerald; Wutte, Andrea; Wach, Paul; Pieber, Thomas R. (February 1, 2000). "Measurement of interstitial albumin in human skeletal muscle and adipose tissue by open-flow microperfusion". American Journal of Physiology. Endocrinology and Metabolism. 278 (2): E352–E356. doi:10.1152/ajpendo.2000.278.2.e352. ISSN 0193-1849. PMID 10662720. S2CID 11616153.
^Dragatin, Christian; Polus, Florine; Bodenlenz, Manfred; Calonder, Claudio; Aigner, Birgit; Tiffner, Katrin Irene; Mader, Julia Katharina; Ratzer, Maria; Woessner, Ralph; Pieber, Thomas Rudolf; Cheng, Yi (November 23, 2015). "Secukinumab distributes into dermal interstitial fluid of psoriasis patients as demonstrated by open flow microperfusion". Experimental Dermatology. 25 (2): 157–159. doi:10.1111/exd.12863. ISSN 0906-6705. PMID 26439798. S2CID 34556907.
^Kolbinger, Frank; Loesche, Christian; Valentin, Marie-Anne; Jiang, Xiaoyu; Cheng, Yi; Jarvis, Philip; Peters, Thomas; Calonder, Claudio; Bruin, Gerard; Polus, Florine; Aigner, Birgit (March 2017). "β-Defensin 2 is a responsive biomarker of IL-17A–driven skin pathology in patients with psoriasis". Journal of Allergy and Clinical Immunology. 139 (3): 923–932.e8. doi:10.1016/j.jaci.2016.06.038. ISSN 0091-6749. PMID 27502297. S2CID 30272491.
^Kleinert, Maximilian; Kotzbeck, Petra; Altendorfer-Kroath, Thomas; Birngruber, Thomas; Tschöp, Matthias H.; Clemmensen, Christoffer (December 2019). "Corrigendum to "Time-resolved hypothalamic open flow micro-perfusion reveals normal leptin transport across the blood–brain barrier in leptin resistant mice" [Molecular Metabolism 13 (2018) 77–82]". Molecular Metabolism. 30: 265. doi:10.1016/j.molmet.2019.11.001. ISSN 2212-8778. PMC 6889745. PMID 31767178.
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