sheath (sheth) 1. A covering structure of connective tissue, usually of an elongated part, such as the membrane covering a muscle. 2. An instrument introduced into a vessel during angiographic procedures when multiple catheter changes are anticipated. It facilitates ease of change and decreases morbidity at the puncture site. Patient care

A sheath is a device that may be placed into a vessel at the site of percutaneous access. Sheaths permit rapid exchanges of guidewires and catheters while maintaining intravascular access. Sheaths are sized based on the diameter of the catheter or device that they allow to pass. A 7-Fr sheath accepts devices up to 7 Fr in outer diameter.

Medical Definition of sheath 1 : an investing cover or case of a plant or animal body or body part: as a : the tubular fold of skin into which the penis of many mammals is retracted

May 19, 2022 · A catheter sheath is a plastic tube of larger diameter than an intravenous catheter, used in the process of introducing the catheter to limit pain and increase accuracy. Companies may package sheaths with catheters, and it is also possible to purchase them as standalone items.

sheath (shēth) n. pl. sheaths (shēthz, shēths) 1. a. A usually close-fitting case or covering for a blade, as of a sword. b. Any of various similar coverings. 2. Biology An enveloping tubular structure, such as the base of a grass leaf that surrounds the stem or the tissue that encloses a muscle or nerve fiber. 3. A close-fitting dress. 4.

May 12, 2022 · An introducer sheath is a medical device used for venous access in procedures like angioplasties. It holds a vessel open and allows practitioners to insert other tools safely into the area of interest. Medical manufacturers produce a range of introducer sheath products for different applications, in sterile packaging designed for ease of use.

Jan 26, 2022 · A tendon sheath, which is a thin layer of tissue, surrounds each tendon in the body. The tendon sheath can also be called synovial lining or fibrous sheath . Tendon sheaths help protect tendons from abrasive damage as they move.

Jan 19, 2022 · A sheath is a protective covering or encasement that's used during cardiac procedures to assist with guidewire and catheter insertion and advancement. A sheath can be placed in an artery, a vein,...

a fibrous membrane, usually quite thin and devoid of fat, surrounding a single muscle, separating it from adjacent muscles and allowing movements between them; related to contraction. Synonym (s): fascia propria musculi [TA], muscle sheath. Farlex Partner Medical Dictionary © Farlex 2012.

Dec 02, 2011 · What is the medical term meaning without a sheath? ... Medical term for within the cell is intra- (meaning within or inside) cellular (meaning cell) *** intracellular***-cytic.