98 results about "Catheters dialysis" patented technology

A catheter suitable for use in performing peritoneal dialysis. The catheter is a dual lumen catheter which allows for continuous flow peritoneal dialysis. Dialysate flows through the catheter into the patient via one lumen and simultaneously flows through the catheter out of the patient via the second lumen. The dual lumen dialysis catheter has a flexible tube which has an implantable portion extending from an external patient portion. Both of the lumens have openings in the external patient portion for connecting to a supply and drain of dialysate, respectively. The implantable portion has a preformed curved segment which has an outlet for the first lumen to flow dialysate into the patient's peritoneal cavity. The implantable portion has an opening for the second lumen at the distal end to flow dialysate out of the peritoneal cavity and removal from the patient. The catheter facilitates mixing of fresh and spent dialysate inside the peritoneal cavity by inflowing fresh dialysate into the cavity at a location substantially separated from the cavity outflow location, and by directing the inflow of dialysate into the cavity opposite the cavity outflow location.

The present invention provides a dialysis catheter that is designed to function in reverse-flow, having a dual lumen configuration. An embodiment of the present invention includes two lumen cooperatively configured in a co-axial design. The arterial lumen is circular or oval and extends beyond the termination of the venous lumen. The arterial lumen extracts the blood from the blood vessel for hemodialysis treatment. The venous lumen is also circular or oval. Terminating at a proximal point to the distal end of the arterial lumen, this configuration of the venous lumen aids in preventing recirculation. The venous lumen returns dialyzed blood back into the patient. The venous lumen can further include a plurality of apertures to aid in reducing the risk of fibrin sheath growth. In a method of use, the arterial lumen of the invention preferably resides within the right atrium with the venous lumen positioned within the superior vena cava.

A dialysis catheter comprising a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen configured to deliver blood, and at least three longitudinally extending lumens positioned radially of the central lumen and configured to withdraw blood from a patient. At least one blood delivery opening is formed in the distal portion of the catheter body and in fluid communication with the first lumen and configured for passage of blood therethrough. At least three blood withdrawal openings are formed in the outer wall of the catheter body, wherein each of the openings is in fluid communication with one of the at least three lumens and is configured for passage of blood from a patient

A multi-lumen catheter comprising a first lumen extending through the catheter to a first distal opening, and a second lumen extending through the catheter to a second distal opening distal to the first distal opening so that an extending portion of a septum separating the lumens extends distally past the first distal opening. A tip is overmolded on the extending portion and includes a first ramp adjacent to the first distal opening and a second ramp adjacent to the second distal opening. The ramps direct fluids exiting the openings away from a longitudinal axis of the catheter.

A multiple tube catheter, such as a hemo-dialysis catheter, has first and second tubes which are attached to each other over a zone by one or more longitudinally extending wires which joins the two tubes over that zone. When a catheter is implanted in the patient, the attached zone is within the patient so that the catheter cannot be removed or advanced. When the catheter is to be removed, the longitudinally extending wire or wires are pulled proximally out of the tubes involved so that the two tubes can be separated and individually removed. A flexible separating prong within the patient and proximal of the zone holds the tubes apart to further assure that the catheter cannot be moved.

An anchoring system for securing a dialysis catheter to a patient comprises an anchor pad and a retainer. The anchor pad is attached to the skin of the patient by an adhesive layer on one side of the pad. The retainer is disposed upon the surface of the anchor pad opposite the adhesive layer and includes a base and a cover and a adhesive spot. A groove upon the base is arranged to receive a Y-site portion of a dialysis catheter where the lumens merge distal to the insertion site. A post also protrudes from the base to the cover at a position which will be disposed between the two distal branches of the dialysis catheter. The cover closes over the base, securing the Y-site between the groove and the post. Closing the cover also places at least a portion of the catheter in contact with the adhesive spot. This contact between the retainer, adhesive spot and catheter thereby inhibits inadvertent motion of the catheter upon the patient. A latch mechanism is disposed upon the retainer to maintain the cover in a closed position over the Y-site of the catheter on the base.

The invention relates to a method and apparatus for locating and tracking persons by use of an implantable device. The described invention is an implant able device composed of biocompatible materials in all areas where contact with organic tissue occurs. The gross anatomic siting of the device includes any limb, the torso, including back and perineum, the neck, and the head. The surgical anatomic siting of the device includes: (1) Supramuscular: for example, deep to the epidermis, dermis, and subcutaneous fat, on or attached to muscle and / or muscle fascia. Such a location is currently used for implantation of commercially available buried intravenous access ports, which are positioned on, and attached to, the pectoralis major muscle fascia; (2) Intramuscular: for example, within or between the muscles of a limb; (3) Submuscular: for example, deep to a large muscle. Such a location is currently used for implantation of commercially available artificial urethral and anal sphincter reservoirs, which are positioned deep to the rectus abdominus muscles, within the pre-peritoneal Space of Retzius; (4) Intraluminal: for example, within the lumen of an organ which has a naturally occurring orifice. Such a location is currently used for implantation of commercially available ingested video endoscopy capsule devices, i.e. gastrointestinal tract lumen, and intrauterine contraceptive devices, i.e. uterus lumen; and (5) Intracavitary: for example, intrathoracic or intraperitoneal. Such an intraperitoneal location is currently used for implantation of commercially available intraperitoneal dialysis catheters.

A dialysis catheter comprising a first portion having a first dianeter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition region between the first portion and distal portion. A first longitudinally extending central lumen configured to deliver blood terminates in an opening in the distal portion. At least two independent longitudinally extending lumens are positioned radially of the first lumen, configured to withdraw blood from a patient, and terminate in a longitudinally directed opening in the transition portion.

A medical catheter comprising a first return lumen, a plurality of withdrawal lumens, a first clamping member and a plurality of intake extension tubes. Each intake extension tube communicates with an intake lumen of the catheter to provide fluid communication with the respective intake lumens. The intake extension tubes are positioned in a stacked arrangement, and the clamping member has a plurality of posts to receive the stacked tubes to limit lateral movement thereof.

A catheter assembly includes catheter having proximal and distal ends and at least one lumen extending between the ends. At least one end of the catheter is formed from a material that can be trimmed to achieve a selected length for the catheter. A tubular connector is telescoped over the catheter and a hub is joined to the tubular connector. Proximal portions of the hub are configured for connection to a medical apparatus. A cuff is mounted around the tubular connector or the catheter. The cuff is formed from a material that will permit or promote the growth of scar tissue for anchoring the catheter device at least on a semi-permanent basis in a patient.

A medical catheter comprising a first return lumen, a plurality of withdrawal lumens, a first clamping member and a plurality of intake extension tubes. Each intake extension tube communicates with an intake lumen of the catheter to provide fluid communication with the respective intake lumens. The intake extension tubes are positioned in a stacked arrangement, and the clamping member has a plurality of posts to receive the stacked tubes to limit lateral movement thereof.

A dialysis catheter includes an elongate catheter member having an outer wall member defining proximal and distal end regions and first and second longitudinal lumens. The outer member includes first and second ports in respective fluid communication with the first and second longitudinal lumens. The first opening and the first lumen define an inflow passage. The second opening and the second longitudinal lumen define an outflow passage. A valve is disposed relative to the outer member proximal of the first port. The valve is adapted to move from a closed position to an open position in response to a predetermined vacuum pressure level realized within the first longitudinal lumen to permit flow of blood through the valve and into the first longitudinal lumen. The valve may be adapted to move to the open position in the event of a luminal occlusion.

A dialysis catheter is disclosed which comprises a catheter main body and a closure member. The catheter main body includes a first lumen which communicates with a tip-end hole and a second lumen which communicates with a side hole. The closure member has a shape in which a tip-end side of the closure member is inclined with a reduced diameter for closing off a tip-end opening. The side hole is a long hole extending in the catheter long-axis direction. The major axis of the side hole is at least 1.5 times the outer diameter of the catheter, and the minor axis is between 0.5 and 0.9 times the outer diameter. A base-end side of the closure member extends to the position of the side hole and seals the tip-end region thereof.

A catheter assembly is provided for intracranial treatment having outer and inner catheters. The outer catheter has a first lumen communicating between a first opening and at least one aperture and a second lumen in communication with a second opening. The first and second openings are distal to the proximal portion of the outer catheter. The inner catheter, preferably a micro-dialysis catheter, is sized to be received within the first lumen and includes at least one passageway in communication with at least one port for transfer of a fluid with a tissue region in the brain of the patient. The assembly preferably also includes a stylet sized to be received within the second lumen to provide rigidity to the outer catheter for its precise positioning within the brain. The outer catheter can include an element that is preferably a contact for monitoring brain activity. A method of transferring a fluid with a brain tissue region is also disclosed.