54 results about "Double lumen catheter" patented technology

A system and method is provided that is adapted to allow for rapid cannulation of a guidewire into a branch lumen extending from a main lumen in a body of a patient, and in particular into two renal arteries extending from an abdominal aorta wall. A dual lumen catheter shaft delivers first and second pre-shaped guidewires to the location of the renal arteries in the aorta, such that the first and second pre-shaped guidewires self-cannulate within the renal arteries. Additional guidewires and / or interventional devices may be incorporated into the system and method for use with the catheter shaft, or over the two pre-shaped guidewires, to meet a particular need for a particular patient or intended procedure.

An inflatable gastric band incorporates a fluid channel within an outer surface of the band and an inflatable bladder on a stomach-facing side of the band. The gastric band attaches to a double lumen catheter, which communicates with a dual infusion port. One lumen communicates with the fluid channel and one port, while the other lumen communicates with the inflatable bladder and a second port. Injection of fluid into one chamber of the infusion port expands inflatable bladder, allowing adjustment to the diameter of the stoma. Injection of drugs or therapeutic agents into the second chamber allows the infusion of drugs or agents directly into the abdominal cavity of a gastric band recipient. The inflatable bladder can be continuous or segmented. A segmented bladder reduces pinching and / or folding of the inner surface of the gastric band during expansion / contraction, thereby lessening stomach pinching and / or irritation.

Method and apparatus for the extracorporeal treatment of blood by utilizing a peripherally inserted dual lumen catheter assembly for the continuous removal and return of blood for renal replacement treatment, in particularly, treatment of congestive heart failure and fluid overload by ultrafiltration. A catheter is inserted in a peripheral vein and maneuvered upward through the vascular system to access the reservoir of blood in the large or great veins for continuous blood withdrawal and treatment. Air-tight connectors are incorporated in the catheter assembly to overcome the untoward effects of negative pressure in blood withdrawal.

A method and apparatus for retroperfusing cerebral venous vasculature with autologous venous blood through a percutaneous entry site which incorporates a double-lumen catheter, a self-inflating pressure-regulated balloon mounted on the catheter and a perfusion outflow region either distal to the balloon for direct perfusion into the superior sagittal sinus, or proximal to the balloon for perfusion into the transverse sinus near the junction of the superior sagittal sinus.

A cutting balloon catheter assembly (100) including a dual lumen catheter (130) having a distal end (134), an inflation / deflation lumen (138) and a second or guidewire lumen (136). The assembly further includes an inflatable balloon (110) having an interior cavity (116) and an expandable covering (120) disposed about the balloon wherein the covering has an array of cutting edges. In the assembly, the balloon (110) is fixedly connected to the distal end (134) of the catheter and the interior cavity (116) of the balloon (110) is in fluid communication with the first lumen (138) of the catheter (130). A method of removing obstructions (149) from vessel walls (154) using the present invention is also disclosed wherein the cutting edges abrade the stenoses, plaque or lesions along the vessel walls, when the catheter assembly is reciprocally moved longitudinally or rotationally after inflation of the balloon.

A catheter is described. In one embodiment, the catheter includes: a shaft segment including a shaft segment uptake lumen and a shaft segment return lumen; and a distal end segment coupled to the shaft segment, the distal end segment including a distal end segment uptake lumen and a distal end segment return lumen, where the distal end segment central axis forms a non-zero angle with the shaft segment central axis when the catheter is in its unstressed configuration. In a second embodiment, the catheter includes: a shaft segment; and a distal end segment coupled to the shaft segment; where the uptake lumen distal end is terminated by a closed surface, further where the uptake lumen distal segment includes only one side hole. In a third embodiment, the catheter includes: an uptake lumen; and a return lumen; where at least a portion of the return lumen distal segment is helically coiled around the uptake lumen distal end.

A tunneler for a dual lumen tip catheter, comprises an elongated body extending from a distal tissue-penetrating end to a proximal, catheter-coupling end, the catheter coupling end including a catheter tip receiving portion including a cutout sized and shaped to receive a dual lumen tip of a catheter to be coupled thereto and a proximally extending lumen-mating projection oriented so that, when inserted into a lumen of the catheter, the dual lumen tip of the catheter is received in the cutout in an orientation relative to an elongated body of the catheter substantially the same as when the dual lumen tip and the elongated body of the catheter are in an unstressed state.

A valved catheter that allows placement and withdrawal of an accessing device or attachable unit without the risk of air embolism or blood loss. In one variation, the valved catheter includes a catheter tube having a necked portion in its proximal end that forms an integral valve, the necked portion being surrounded by a compression sleeve that biases the valve in a closed position. In another variation, the valved catheter is a dual lumen catheter with a corresponding bifurcating extension for engaging the valves in the catheter in order to establish fluid communication through the catheter.

Plasma fluid removal is needed in a variety of clinical conditions including congestive heart failure and moderate renal insufficiency. In order to avoid the problems inherent in extracorporeal ultrafiltration methods, the present invention removes fluid using an intravascular or intracorporeal dual-lumen catheter. Plasma fluid is driven across a semipermeable membrane, as in an in vivo vascular catheter. Suboptimal intracatheter flow, luminal collapse, erratic high transmembrane flow with nonhomogenous caking and clotting of the external catheter surface are all avoided by inducing pressure gradients across the wall by means of osmotic forces instead of negative pressures induced by hydraulic pumps. Osmotically induced fluid flow would tend to keep the lumena slightly distended and thereby simplify the fluid delivery systems. Osmotic gradients are maintained by utilizing dual lumen catheters typically placed in large central veins, and attached to pumps supplying high osmolality sterile solutions (such as dextrose or other sugars). Such a sealed system using readily available sterile sugar solutions and biocompatible catheter substrate would be extremely safe.

The system (10) for temperature control of the human brain comprises a double lumen catheter (30) introduced through the human nostril and arranged with its tip at the level of the dorsal side of the tongue. The dual lumen catheter device (30) includes a first lumen (32) and a second lumen (38) in fluid communication through a set of end openings (34). The second lumen is configured as an inflatable balloon. The temperature regulator is connected to a storage tank (20) containing a cooling fluid for regulating the temperature of the fluid. The pump circulates the fluid. Alternatively, the fluid is supplied by gravity.

Apparatus is provided for a reversible connection catheter comprising in combination a hub and a valve housing portion. The hub is composed of a tapered molded body having a narrow tapered end and an enlarged other end. The narrow tapered end has integrated therein a double lumen catheter projecting therefrom. Two bores extend through the hub each communicating with a distinctive lumen in the catheter. The valve housing portion is composed of a distal segment with two spaced through first openings, a proximal segment with two spaced through second openings and a resilient gasket portion with two spaced first female luers mounted between the proximal and distal segments. The valve housing further has a third opening in said proximal segment positioned between the first and second openings and a second female luer on the resilient gasket portion in alignment with said third opening to serve as a flushing valve. A structural member operatively holds the hub and valve housing portion together. A stopcock may be interposed and held between the hub and the valve housing portion.

A blood vessel catheter includes a dual lumen catheter tube and a bolus insert attached to the distal end of the tube. First and second ports are formed between the nose section of the bolus and distal end openings of first and second lumens in the tube. The catheter is fabricated by insert molding a thermoplastic bolus onto the distal end of a thermoplastic tube.

The present disclosure is directed to a method of manufacturing a catheter wherein a dual lumen catheter body and at least one distal tip member are separately formed and the at least one distal tip member is subsequently assembled to the dual lumen catheter body. The components may be assembled using a heating process or, alternatively, using adhesives.

The invention discloses a double-cavity central venous catheter, which comprises a double-cavity catheter, a connecting base and an extension tube which are connected and communicated sequentially, wherein a catheter main cavity and a catheter lateral cavity are formed in the double-cavity catheter; the catheter lateral cavity is connected with the extension tube by the connecting base; the catheter main cavity is not provided with the extension tube and has a needle bed structure at an opening of the connecting base; a puncture needle can be inserted into the catheter main cavity by the needle bed structure, and the needle bed structure also can be connected with an injector; and a movable float structure is arranged on the catheter. According to the double-cavity central venous catheter, guiding guide wires are not needed to be used in the puncture catheter placement of a deep venous system, and the conventional use of a skin dilator also can be avoided, so the double-cavity centralvenous catheter is easy and convenient to operate, and easy to control, safe and reliable, and slightly damages a human body; and skin is fixed firmly.

The present invention concerns a double-lumen catheter and a method for delivering or withdrawing fluids to / from a patient, in particular for use in hemodialysis. The double-lumen catheter comprises an elongated tubular body having a proximal end and distal end, with the distal end being positionable within a vessel of a patient, a divider wall extending along an interior of said tubular body and separating said interior into an intake lumen and a return lumen. The intake lumen and said return lumen each comprise an opening sloping toward the divider wall and toward the distal end of the tubular body, respectively, the openings.

The invention relates to a double-lumen catheter device capable of adjusting single-pulmonary ventilation volume and positive airway pressure, comprising a main catheter and an operation side catheter and a non-operation side catheter, wherein one end of the main catheter, one end of the operation side catheter and one end of the non-operation side catheter are connected by a first Y-shaped catheter to form a tee structure; the other end of the non-operation side catheter is connected with a non-operation side catheter port; the other end of the operation side catheter is connected with an operation side catheter port; an operation side catheter body is provided with a two-way two-channel flow control mechanism capable of adjusting and controlling the ventilation volume and the positive airway pressure of the operation side catheter; and the other end of the main catheter is connected with a medical machine port. The invention has strong adaptability and wide application, can simplify the anesthesia management so as to enable the anesthesia to be safer, and can effectively prevent complicating diseases of hyoxemia and the like caused by operation cannula while providing a relatively static operation field.

A multiple lumen catheter (110,150) having at least first and second lumens (112,114; 152,154). At least one of the first and second lumens (112,152) is generally C-shaped in cross-section, with a septum wall (120,160) dividing the first and second lumens providing a generally straight side to the C-shaped cross-section. A stylet or guide wire (130) may be disposed along the C-shaped cross-section lumen (112,152,154) having a larger diameter than one used with catheters of the same outer diameter but that have lumens of only D-shaped or circular shaped cross-sections.

Systems, kits and methods for preparing an injection system and / or treating target lesions with a selective internal radiation therapy which includes a double-barrel syringe loaded with a two-component tissue glue and radioisotope loaded microspheres. The microspheres are loaded into the syringe based on the size of the target location and are administered with a needle or dual-lumen catheter. Dosing regimens for treating breast cancer lesions or surgical beds up to 130 mm in diameter and hepatocellular carcinoma lesions up to 50 mm are included.

A catheter is disclosed for providing a pressure measurement at a vascular lesion. The catheter includes a tubular component having dual lumens along at least a segment thereof in which a first lumen acts as a pressure inlet and a second lumen allows the catheter to be tracked over a guidewire. A plurality of openings are located along a distal segment of the tubular component that permit blood flow into the first lumen when disposed in vivo. A pressure sensor is located within a handle component of the catheter or within the tubular component to be in fluid communication with a proximal end of the first lumen. When the catheter is positioned at the vascular lesion, the first lumen fills with blood via the plurality of openings such that the pressure sensor is able to sense a pressure of the blood at a distal end of the catheter.

A catheter has an outer peripheral portion (15) in the form of a tube and an internal wall (16, 26) within the tube forming a plurality of lumens (11a, 11b, 21a, 21b). Axially extending linear contrastradiography sections (17a, 17b, 27a, 27b) of radiopaque material are formed at a plurality of intersection points between the outer peripheral section and the wall, the peripheral extent (a, b) of the respective contrastradiography sections being different.

The invention belongs to the technical field of medical instruments, and particularly relates to a double-lumen bronchial intubation which comprises a double-lumen catheter with one end serving as a patient end and the other end serving as a mechanical end, an air bag arranged at the patient end of the double-lumen catheter and a three-way connecting tube connected to the mechanical end of the double-lumen catheter, the double-lumen catheter comprises a left catheter and a right catheter, identification stickers used for distinguishing the left catheter from the right catheter are arranged near the mechanical ends of the left catheter and the right catheter respectively, a one-way valve is arranged at the joint of the left catheter and the right catheter of the double-lumen catheter and located near the mechanical end of the double-lumen catheter, and the one-way valve is provided with a left atomization connector in one-way communication with the left catheter and an atomization connector in one-way connection with the right catheter. The double-lumen bronchial intubation has the advantages that automatic timing can be achieved after airflow is blocked, timing is accurate, the workload of workers is reduced, oxygen can be supplied to a patient through ventilation, atomization can be conducted on the patient at the same time, and lung dryness is avoided.

The invention relates to a double-lumen catheter side port incision device of a bronchial blanking plug. A linked clamping mechanism comprises a rear slide block, a front slide block, a movable clamp plate and an operating handle, wherein the front slide block and the rear slide block are respectively arranged in guide grooves or guide holes which are positioned on the front part and the rear part of a machine base; at least two push rods are arranged in the guide holes of the machine base and supported against on the guide surface of the rear slide block; the movable clamp plate arranged on the front part of the machine base is connected with the push rods; the operating handle articulated with the machine base is respectively articulated with the front slide block and the rear slide block through a front connecting rod and a rear connecting rod; a blade is arranged between a tool apron and a pressing block and fixed through a fastening screw; the tool apron is adjustably connected with the front slide block; both ends of an adjustment rod and both ends of a guide pillar are respectively connected with the machine base and a positioning plate; an adjustment part positioned at the outer side of the positioning plate is connected with the adjustment rod; and a catheter rod is arranged on the positioning plate and positioned at the rear part of the blade. The double-lumen catheter side port incision device provided by the invention has the advantages of reasonable structure, reliability for positioning and clamping, handiness for operation and capability of enhancing production efficiency and finished product ratio.

The invention discloses a spherical double-cavity micro-catheter, and belongs to PCI surgical instruments. The spherical double-cavity micro-catheter comprises a head end, a guide wire distribution mechanism and an operating catheter, wherein the operating catheter is a double-cavity catheter and is internally provided with a main cavity and a branch cavity; the main cavity penetrates through theguide wire distribution mechanism to communicate with the head end; the branch cavity communicates with the guide wire distribution mechanism; the guide wire distribution mechanism comprises a main channel communicating with the main cavity and a branch channel; one end of the branch channel communicates with the branch cavity, and the other end of the branch channel communicates with a distribution channel in the guide wire distribution mechanism; the distribution channel is provided with a branch guide wire outlet in the side wall of the guide wire distribution mechanism; and the included angle between the direction of the branch guide wire outlet and the branch channel is 60-120 degrees. The spherical double-cavity micro-catheter is simple in structure and novel in conception, and is low in operation difficulty, good in auxiliary effect, high in operation success rate and remarkable in effect when being applied to a reverse guide wire operation of a PCI branch lesion operation.

Systems, kits and methods for preparing an injection system and / or treating target lesions with a selective internal radiation therapy which includes a double-barrel syringe loaded with a two-component tissue glue and radioisotope loaded microspheres. The microspheres are loaded into the syringe based on the size of the target location and are administered with a needle or dual-lumen catheter. Dosing regimens for treating breast cancer lesions or surgical beds up to 130 mm in diameter and hepatocellular carcinoma lesions up to 50 mm are included.

The invention discloses a branch type sawtooth-shaped thrombus breaking balloon catheter. The balloon catheter comprises a catheter cavity connector and a balloon cavity connector, the upper right side of the catheter cavity connector is connected with the balloon cavity connector, the right end of the catheter cavity connector is mutually connected with the left end of a balloon tube, a guide tube is arranged in an inner cavity of the balloon tube, the upper portion of the right end of the balloon tube is mutually connected with a small balloon, the guide tube and the balloon tube form a double-cavity catheter, the outer diameter of the double-cavity catheter is 1.91 mm, the space and the function of the double-cavity catheter are mutually independent, the lower portion of the right end of the balloon tube is mutually connected with a large balloon, a near-end marking point is arranged at the middle end of the guide tube, and a far-end marking point is arranged at the right end of the guide tube. The branch type sawtooth-shaped thrombus breaking balloon catheter can be operated in the two directions perpendicular to each other to cut and break thrombus, the dosage of thrombolysis medicine is reduced, and meanwhile the thrombolysis effect can be improved; and in addition, the risk of pulmonary embolism caused by thrombosis can further be reduced.

The present application concerns a double-lumen catheter, an elongated tubular body (11) having a proximal end and distal end, a divider wall (26) extending along an interior of said tubular body (11) and separating said interior into an intake lumen (22) and a return lumen (24), and the intake lumen (22) and said return lumen (24) each comprising a bevelled opening (12; 14) sloping toward the divider wall (26) and toward the distal end of the tubular body (11), respectively, the openings (12; 14) being divided by the divider wall (26), such, that one side of the divider wall (26) faces the intake lumen (22) and the other side of the divider wall (26) faces the return lumen (24). Further, the divider wall (26) at the distal end of the tubular body (11) on at least one of its two sides comprises at least one ridge (16; 18) extending in the area of the openings (12; 14) and along a longitudinal portion of the tubular body (11).

The invention relates to a catheter system (10) for introducing and positioning a double-lumen catheter (14), in particular a dialysis catheter, in a blood vessel, comprising a double-lumen catheter having a distal catheter tip (40), having a first lumen (20) and a second lumen (22), a first mandrel (36) extending through the first lumen and a second mandrel (42) extending through the second lumen, both mandrels of the catheter being designed to be radioopaque. The distal end (44) of the second mandrel is arranged at a distance (X) in the proximal direction from the distal catheter tip, the distance between the distal catheter tip and the distal end of the second mandrel corresponding in particular to a functional catheter tip length.