269 results about "Ureter" patented technology

A polymer of fluorinated monomers and hydrocarbon monomers is provided. It is also provided a polymer blend that contains a polymer formed of fluorinated monomers and hydrocarbon monomers and another biocompatible polymer. The polymer or polymer blend described herein and optionally a bioactive agent can form an implantable device such as a stent or a coating on an implantable device such as a drug-delivery stent, which can be used for treating or preventing a disorder such as atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, or combinations thereof.

It is a general object of the invention to provide a method of effecting tissue repair or replacement using a biomaterial. It is a specific object of the invention to provide a biomaterial suitable for use as a stent, for example, a vascular stent, or as a conduit replacement, as an artery, vein or a ureter replacement. The biomaterial can also be used as a stent or conduit covering or lining. The present invention relates to a method of repairing, replacing or supporting a section of a body tissue. The method comprises positioning a biomaterial at the site of the section and bonding the biomaterial to the site or to the tissue surrounding the site. The bonding is effected by contacting the biomaterial and the site, or tissue surrounding the site, at the point at which said bonding is to be effected, with an energy absorbing agent. The agent is then exposed to an amount of energy absorbable by the agent sufficient to bond the biomaterial to the site or to the tissue surrounding the site.

It is a general object of the invention to provide a method of effecting repair or replacement or supporting a section of a body tissue. Specifically to provide an elastin or elastin-based biomaterial suitable for use as a stent, for example, a vascular stent, or as conduit replacement, as an artery, vein or a ureter replacement. The biomaterial can also be used as a stent or conduit covering or coating or lining. It is also an object of the invention to provide a method of securing an elastin or elastin-based biomaterial to an existing tissue without the use of sutures or staples.

A medical device comprising a coating thereon comprising a biocompatible polymer and heparin is provided herein. Heparin is coupled with the biocompatible polymer via a spacer having a grouping that renders a binding site of the heparin molecule accessible by a binding protein. The medical device can be implanted in a human being for the treatment of a disease such as atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, or combinations thereof.

A hand-held disposable portable urinal device particularly well-suited for female use. The easy-to-use device has a leak and splash resistant soft upper seal attached to a retractable funnel, which easily folds back into a sealable bag. The funnel has a neck portion which allows the user to comfortably hold the urinal close to the ureter during use. The disposable urinal bag is odor- and vapor-sealable, and has a hydrophobic polymer containing inner bag for absorbing the urine. In addition, the disposable urinal has a deodorizer activated by the urine upon contact. The disposable urinal is easily transported in a folded state, and preferably comes three in a box. After use, the disposable urinal may be sealed and thrown away.

A system for removing a kidney stone from a ureter may include: an elongate, flexible, outer shaft having a distal end configured to be advanced into the ureter and a proximal end; an elongate, flexible, inner shaft extending through at least part of the outer shaft; an expandable stone retention member extending through at least part of the inner shaft and moveable along the longitudinal axis relative to the inner shaft; an elongate, flexible camera positioned coaxially within the retention member shaft, such that a distal end of the camera is located at or near a distal end of the inner shaft; and a handle coupled with the proximal end of the outer shaft, a proximal end of the inner shaft, and a proximal end of the retention member shaft.

A biodegradable double stent is used for various organs such as a biliary tract, an esophagus, an airway and a ureter. A biodegradable stent having a hollow cylindrical body woven out of a separate wire made of biodegradable polymer so as to have a plurality of rhombic spaces is fixed to an intermediate portion of a primary stent having a cylindrical body. When administered into the organ, the biodegradable stent has its original function of expanding the organ, and is firmly supported in the inner wall of a narrowed passage of the organ by pressurizing the inner wall of the narrowed passage of the organ. After a predetermined time period has elapsed, the biodegradable stent is gradually degraded away by bodily fluids, thereby enabling the primary stent to be easily removed from the organ.

Provided herein is an end-capped poly(ester amide) PEA) polymer and the method of making the polymer. The PEA polymer is substantially free of active amino end groups and/or activated carboxyl groups. The PEA polymer can form a coating on an implantable device, one example of which is a stent. The coating can optionally include a biobeneficial material and/or optionally with a bioactive agent. The implantable device can be used to treat or prevent a disorder such as one of atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, and combinations thereof.

It is a general object of the invention to provide a method of effecting repair or replacement or supporting a section of a body tissue using tropoelastin, preferably crosslinked tropoelastin and specifically to provide a tropoelastin biomaterial suitable for use as a stent, for example, a vascular stent, or as conduit replacement, as an artery, vein or a ureter replacement. The tropoelastin biomaterial itself can also be used as a stent or conduit covering or coating or lining.

Provided herein is a PEA polymer blend and coatings or implantable devices formed therefrom. The PEA polymer blend is formed of a PEA polymer and a material capable of hydrogen bonding with the PEA. The PEA polymer blend can form a coating on an implantable device, one example of which is a stent. The coating can optionally include a biobeneficial material and/or optionally with a bioactive agent. The implantable device can be used to treat or prevent a disorder such as one of atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, and combinations thereof.

An apparatus is provided that includes an elongate member having a distal end portion, a proximal end portion, and a medial portion that is disposed between the distal end portion and the proximal end portion. The medial portion is configured to be disposed in a ureter of a patient. The apparatus further includes an expandable member that is coupled to the elongate member. The expandable member has an expanded configuration and a collapsed configuration. The expandable member is further configured to be inserted into the ureter of the patient and configured to contact the ureter to help retain the elongate member in place within the patient.

A ureteral access sheath comprises a sheath assembly having a main lumen and one or more secondary lumens. The sheath assembly can be configured with medical devices in both lumens, for example, a ureteroscope in the main working channel, and a guidewire, stone basket, grasper, laser fiber, or other surgical instrument in the secondary working channel. Or the sheath assembly can be configured with a medical device in one channel and the other lumen coupled to an irrigation means, such that irrigation of the surgical field can be efficiently accomplished even though the main working channel is substantially completely occupied by, e.g., a ureteroscope. Or the sheath assembly can be configured for irrigation through one lumen and aspiration through the other lumen, thereby creating a turbulent flow which washes the surgical field to facilitate removal of particles and debris.

A biodegradable double stent is used for various organs such as a biliary tract, an esophagus, an airway and a ureter. A biodegradable stent having a hollow cylindrical body woven out of a separate wire made of biodegradable polymer so as to have a plurality of rhombic spaces is fixed to an intermediate portion of a primary stent having a cylindrical body. When administered into the organ, the biodegradable stent has its original function of expanding the organ, and is firmly supported in the inner wall of a narrowed passage of the organ by pressurizing the inner wall of the narrowed passage of the organ. After a predetermined time period has elapsed, the biodegradable stent is gradually degraded away by bodily fluids, thereby enabling the primary stent to be easily removed from the organ.

A sieving device and related methods including an expandable sieve mounted on a surgical guide wire. The expandable sieve may be a self-expandable braided filter which is mounted on the guide wire in an axially fixed position, or moveable in one or more directions. The sieving device is deployable in an obstructed ureter, or other body lumen, such as at the beginning of a stone removal procedure, prior to actual stone defragmentation (lithotripsy) phase. The expandable sieve may be set distal to the obstructive stone and expanded to span the entire local ureter cross section in order to retain stone fragments larger than a predetermined size from migrating distally towards the kidney under high irrigation rates/pressures during lithotripsy.

The invention discloses a 3D kidney model printing method for kidney stone surgical simulation teaching. The printing method comprises the following steps: acquiring a high-density stone three-dimensional rebuilt model by utilizing MIMICS software by virtue of a scanning period of CTU, acquiring a three-dimensional rebuilt model of kidney skin and arteriovenous blood vessels by virtue of an arteriovenous enhanced period, acquiring a three-dimensional rebuilt model of pelvis and ureter by virtue of secretion enhanced period of pelvis, acquiring a kidney three-dimensional rebuilt model comprising kidney skin, kidney medulla, kidney artery and vein, pelvis and calices and ureter, and finally combining the three-dimensional rebuilt model of each part to obtain a complete kidney three-dimensional rebuilt model. By adopting the method, the problems that percutaneous nephrolithotomy is used as an effective and safe minimally-invasive surgery, to select an optimum puncture point is difficulty and a key point in the surgical operation, the formation of a three-dimensional image in the brain by virtue of a two-dimensional image needs long-term training and is prone to missing small dissection structures can be effectively solved.

The invention relates to the technical field of a medical instrument, particularly to ureteroscope with a flexible end and a retractable sheath, which is used for diagnosis and treatment of urinary system diseases. The ureteroscope comprises the retractable sheath (1) and an endoscope (2), wherein the retractable sheath (1) is a columnar hollow conduit provided with a retractable sheath handle (1.1) at the end above, a bushing port (1.2) matched with two limiting balls (2.3) on the endoscope (2) is arranged inside the retractable sheath handle, and the endoscope (2) is constituted by an eyepiece (2.7), a focal length adjusting knob (2.6), a light guide bundle interface (2.5), a gyration radius adjusting switch (2.8), a lens deflection direction adjusting knob (2.9) and a lens (2.4). The ureteroscope has the advantages that both the gyration radius and the bending angle of a flexible section (2.11) at the end of the endoscope can be adjusted according to needs so as to realize safe and efficient diagnosis and therapeutic surgery on the urinary system diseases related to ureter, pelvis and kidney calyces.