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Ureteral stent Ureteral stent (detail) A ureteral stent (pronounced you-REE-ter-ul), or ureteric stent, is a thin tube inserted into the ureter to prevent or treat obstruction of the urine flow from the kidney. The length of the stents used in adult patients varies between 24 and 30 cm. Additionally, stents come in differing diameters or gauges ...
Balloon angioplasty/stent: Opening of narrow or blocked blood vessels using a balloon, with or without placement of metallic stents to aid in keep vessel patent. [5] Endovascular aneurysm repair: Placement of endovascular stent-graft across an aneurysm to prevent expansion or progression of the defective vessel. [6]
The stylet is used to detach the balloon catheter from the pusher. During the healing process urine drains through the wide central lumen while the balloon remains inflated. The ureteric balloon catheter may be used in conjunction with a double J stent for additional drainage. To remove the catheter after several weeks the balloon is deflated ...
A ureteric stent may be inserted to relieve an obstruction. [16] If the cause cannot be removed, a nephrostomy may be required, which is the insertion of a tube connected to the renal pelvis which directly drains urine into a stoma bag. [17]
Endoscopic stenting is a medical procedure by which a stent, a hollow device designed to prevent constriction or collapse of a tubular organ, is inserted by endoscopy.They are usually inserted when a disease process has led to narrowing or obstruction of the organ in question, such as the esophagus or the colon.
Cardiac catheterization is the insertion of a catheter into one of the chambers of the heart, which is used for imaging, diagnosis, and the placement of devices such as stents. [19] David S. Sheridan invented the modern disposable catheter in the 1940s. [20]
Balloon catheters are also utilized in the deployment of stents during angioplasty. Balloon catheters are supplied to the cath lab with a stent pre-mounted on the balloon. When the cardiologist inflates the balloon it expands the stent. When the cardiologist subsequently deflates the balloon, the stent stays behind in the artery and the balloon ...
Diagram of an endoscopic retrograde cholangiopancreatography (ERCP) The patient is sedated or anaesthetized. Then a flexible camera ( endoscope ) is inserted through the mouth, down the esophagus, into the stomach, through the pylorus into the duodenum where the ampulla of Vater (the union of the common bile duct and pancreatic duct) exists.