19387 results about "Catheter" patented technology

An endoscope having a guide tube is described herein. The assembly has an endoscope which is slidably insertable within the lumen of a guide tube. The guide tube is configured to be rigidizable along its entire length from a relaxed configuration. The endoscope has a steerable distal portion to facilitate the steering of the device through tortuous paths. In the relaxed configuration, a portion of the guide tube is able to assume the shape or curve defined by the controllable distal portion of the endoscope. Having assumed the shape or curve of the endoscope, the guide tube may be rigidized by the physician or surgeon to maintain that shape or curve while the endoscope is advanced distally through the tortuous path without having to place any undue pressure against the tissue walls.

An external mixer assembly is provided which externally mixes and delivers a first and a second component of a biological adhesive to tissues or organs for sealing wounds, stopping bleeding and the like. The first and second components are mixed immediately after exiting from separate outlet ports disposed in fluid communication with component reservoirs. In on embodiment, the external mixer assembly includes a housing having a housing head for enclosing therein a first reservoir containing the first component, and a second reservoir containing the second component. The housing further includes a discharge nozzle defining a longitudinal axis for enclosing therein a conduit assembly having a first and a second conduit in communication with the first and second reservoir, respectively. A deflector assembly is connected to the discharge nozzle. The deflector assembly includes a deflector plate to provide a space for initial mixing of the first and second components. The deflector plate is oriented in generally parallel juxtaposed relation distal to the distal face of the discharge nozzle. The first and second components are preferably fibrinogen and thrombin which intermix to form a fibrin sealant.

A replacement heart valve apparatus. The heart valve apparatus includes a stent and a valve frame having a substantially cylindrical body defining a lumen. The valve frame includes a plurality of curved wire pairs attached to the substantially cylindrical body. Each curved wire pair includes an inner curved wire and an outer curved wire. The wire frame further having a plurality of leaflets. Each leaflet is attached to a respective inner curved wire and extends over a respective outer curved wire, so as to position the body of the leaflet within the lumen of the valve frame.

A telemanipulatively controlled guide tube acts as a wrist mechanism for a surgical instrument that extends through the guide tube. The instrument may be removed and replaced with another instrument. In some aspects the instruments are commercial, off the shelf minimally invasive surgical instruments.

A method for forming an anastomosis between first and second organs in a patient using a hollow receptacle that is inflatable with magnetic material. The method may include forming openings through the first and second organs utilizing a hole-forming instrument inserted into the organs through a natural orifice in the patient. The hollow receptacle may be supported on a catheter assembly that is also inserted through the patient's natural orifice and through the openings in the first and second organs and is positioned within the second organ. The hollow receptacle is then inflated with magnetic material and magnetic force is applied within the force organ to draw the inflated receptacle toward the first organ such that the inflated receptacle retains the second organ in sealing contact with the first organ while maintaining the alignment between the first and second openings to create an anastomosis between the first and second organs.

This disclosure relates to surgical stapling apparatus for enhancing one or more properties of body tissue that is or is to be repaired or joined. The apparatus includes a staple anvil, a staple cartridge, a driving member for driving the surgical staples from individual staple slots in the staple cartridge and against the staple anvil, and a wound closure material applicator assembly. The applicator assembly includes at least one conduit extending along at least a length of the driving member, anvil and / or cartridge and at least one reservoir in fluid communication with the at least one conduit, the reservoir containing a wound closure material therein. The staples can be coated with a wound closure material.

The invention concerns an assembly comprising a valve prosthesis to be implanted and a support receiving said valve. The support comprises: at least a tubular portion made of a pliable material slightly stretchable in the circumferential direction; means for fixing said tubular portion to the wall of the corporeal duct; and a plurality of elongated reinforcing elements, arranged on the circumference of said tubular portion and linked to said tubular portion independently of one another; the valve is linked at least partly to said elongated reinforcing elements, in particular at the commissures of its leaflets, and said elongated reinforcing elements jointly form, in extended position, a structure having a predetermined diameter that ensures sufficient extension of said valve.

A multiple use fluid dispenser dispenses a flowable material in a precise pattern and quantity with leaking and clogging between dispensing avoided by employing a trigger fired syringe plunger to expel a fixed volume through a band. Between strokes, an advancement knob rotates the band over a distal dispensing tip to a nondispensing location that wipes excess flowable material and seals a dispensing orifice in a fluid conduit. The advancement knob further may rotate the band to a dispensing position wherein a combination of one or more dispensing holes produce a desired pattern and rate of flow with material over the dispensing hole(s) serving to initiate the flowable material, to control placement, serve as a detachable bandage or buttress material, etc.

The present invention provides methods and apparatus for pleating at least a portion of a patient's body lumen, such as the colon. Pleating is achieved via relative motion between an endoscope and a flexible conduit having an engagement element configured to reversibly engage the body lumen.

A percutaneous heart valve prosthesis (1) has a valve body (2) with a passage (9) extending between the first and second ends (7, 8) of the valve body (2). The valve body (2) is collapsible about a longitudinal axis (10) of the passage (9) for delivery of the valve body (2) via a catheter (18). One or more flexible valve leaflets (3, 4) are secured to the valve body (2) and extend across the passage (9) for blocking bloodflow in one direction through the passage (9). An anchor device (5), which is also collapsible for delivery via catheter (18), is secured to the valve body (2) by way of an anchor line (6). A failed or failing mitral heart valve (101) is treated by percutaneously locating the valve body (2) in the mitral valve orifice (102) with the anchor device (5) located in the right atrium (107) and engaging the inter-atrial septum (103), such that the taught anchor line (6) acts to secure the valve body (2) within the mitral valve orifice (102).

This invention is directed to a medical device with a handle and a catheter. The handle can include a body having a proximal end and a distal end, an actuator moveably coupled to the body, and a handle control member coupled to the actuator, wherein the actuator can be configured to move relative to the body to move the handle control member. The catheter can include a shaft having a proximal end and a distal end, wherein the proximal end of the shaft and the distal end of the body can be configured for releasable coupling. The catheter can also include a steering section located along the shaft and a catheter control member coupled to the steering section. A securing member may move relative to at least one of the handle and the catheter to releasably couple the handle control member to the catheter control member.

A method and apparatus for determining the position and orientation of a remote object relative to a reference coordinate frame includes a plurality of field-generating elements for generating electromagnetic fields, a drive for applying, to the generating elements, signals that generate a plurality of electromagnetic fields that are distinguishable from one another, a remote sensor having one or more field-sensing elements for sensing the fields generated and a processor for processing the outputs of the sensing element(s) into remote object position and orientation relative to the generating element reference coordinate frame. The position and orientation solution is based on the exact formulation of the magnetic field coupling as opposed to approximations used elsewhere. The system can be used for locating the end of a catheter or endoscope, digitizing objects for computer databases, virtual reality and motion tracking. The methods presented here can also be applied to other magnetic tracking technologies as a final "polishing" stage to improve the accuracy of their P&O solution.

A heart valve prosthesis (100) comprises a housing component (110) and a valve component (130). The housing component (110) comprises a housing body (111) having a housing passage (112) extending therethrough. The housing body (111) is configured to be located in, or adjacent to and communicating with, a native valve orifice (16) of a heart (10) and to engage structure of the heart (10) to fix the housing body (111) in relation to the valve orifice (161). The housing component (111) is collapsible for delivery via catheter (2). The valve component (130) comprises a valve body (131) having a valve passage (132) extending therethrough. The valve body (131) is configured to be fixed within the housing passage (112) with the valve passage (132) extending along the housing passage (112). One or more flexible valve elements (131) is / are secured to the valve body and extend across the valve passage (132) for blocking blood flow in a first direction through the valve passage (132) whilst allowing blood flow in the opposing direction. The valve component (130) is collapsible for delivery via catheter (2) separate to the housing component (110). An associated method of replacing a failed or failing heart valve utilising the heart valve prosthesis (100) is also disclosed.

Devices and methods for delivering drugs and other therapeutic or diagnostic substances to desired locations within the bodies of human or non-human animal subjects. An implantable delivery device comprising a reservoir is initianlly attached to a deliver catheter or delivery tool and is introduced into the body and positioned at a desired site. A therapeutic or diagnostic substance is then introduced into the reservoir and the delivery catheter or deliver tool is then removed, leaving the implantable delivery device implanted within the body. The substance is then delivered from the reservoir at a rate that causes the desire diagnostic or therapeutic effect. Also provided are substance eluting stents that elute substance from a selected surface of the stent (e.g., the outer surface) but not from another surface of the stent (e.g., the inner surface).

Methods and devices for implanting pacing electrodes or other apparatus, or for delivering substances, to the heart of other tissues within the body. A guided tissue penetrating catheter is inserted into a body lumen (e.g., blood vessel) or into a body cavity or space (e.g., the pericardial space) and a penetrator is advanced from the catheter to a target location. In some embodiments, a substance or an apparatus (such as an electrode) may be delivered through a lumen in the penetrator. In other embodiments, a guidewire may be advanced through the penetrator, the penetrating catheter may then be removed and an apparatus (e.g., electrode) may then be advanced over that guidewire. Also disclosed are various implantable electrodes and electrode anchoring apparatus.

A device and method for treatment of atrioventricular regurgitation comprises a suturing device. The suturing device is configured to be introducible, via blood vessels leading to the heart, to two leaflets of the atrioventricular valve between the atrium and a corresponding ventricle of the heart. The suturing device is configured for binding together the two leaflets along the free edges of the leaflets. A method of using the device includes inserting the suturing device into a catheter, introducing the catheter to the heart and positioning a distal end of the catheter close to two leaflets of an atrioventricular valve, capturing the free edges of the two leaflets with the suturing device in its open state, binding together the two leaflets by transition of the suturing device into its closed state, and retracting the catheter from the heart. As a result, the closing of the valve is improved.

A system for efficient delivery of radio frequency (RF) energy to cardiac tissue with an ablation catheter used in catheter ablation, with new concepts regarding the interaction between RF energy and biological tissue. In addition, new insights into methods for coagulum reduction during RF ablation will be presented, and a quantitative model for ascertaining the propensity for coagulum formation during RF ablation will be introduced. Effective practical techniques a represented for multichannel simultaneous RF energy delivery with real-time calculation of the Coagulum Index, which estimates the probability of coagulum formation. This information is used in a feedback and control algorithm which effectively reduces the probability of coagulum formation during ablation. For each ablation channel, electrical coupling delivers an RF electrical current through an ablation electrode of the ablation catheter and a temperature sensor is positioned relative to the ablation electrode for measuring the temperature of cardiac tissue in contact with the ablation electrode. A current sensor is provided within each channel circuitry for measuring the current delivered through said electrical coupling and an information processor and RF output controller coupled to said temperature sensor and said current sensor for estimating the likelihood of coagulum formation. When this functionality is propagated simultaneously through multiple ablation channels, the resulting linear or curvilinear lesion is deeper with less gaps. Hence, the clinical result is improved due to improved lesion integrity.

This invention is methods and apparatus for occluding blood flow within a blood vessel (22). In a first series of embodiments, the present invention comprises a plurality of embolic devices (16) deployable through the lumen (12) of a conventional catheter (10) such that when deployed, said embolic devices (16) remain resident and occlude blood flow at a specific site within the lumen of the blood vessel (22). Such embolic devices (16) comprise either mechanical embolic devices that become embedded within or compress against the lumen of the vessel or chemical vaso occlusive agents that seal off blood flow at a given site. A second embodiment of the present invention comprises utilization of a vacuum / cauterizing device capable of sucking in the lumen of the vessel about the device to maintain the vessel in a closed condition where there is then applied a sufficient amount of energy to cause the tissue collapsed about the device to denature into a closure. In a third series of embodiments, the present invention comprises the combination of an embolization facilitator coupled with the application of an energy force to form an intraluminal closure at a specified site within a vessel.

A loading tool for withdrawing, crimping, and loading a stent-mounted valve into a delivery catheter, and for pushing the stent-mounted valve from the delivery catheter into a native heart valve orifice. The loading tool comprises at least one connector adapted for being removably connected to the stent of the stent-mounted valve. A crimping tool having a generally converging shape is adapted for use with the loading tool. Following connection of the loading tool to the stent-mounted valve, the loading tool operates to allow the stent-mounted valve to be drawn through the crimping tool, and loaded, in a crimped state, into a delivery catheter. Also disclosed is a kit of the of the various components for effecting the delivery of the stent-mounted valve and a method for withdrawing, crimping, and loading a stent-mounted valve from a storage container into a delivery catheter for the performance of a transcatheter valve implantation procedure.

An integrally molded ventilation interface includes a hollow bellows-like structure and two nasal prongs extending from a top surface of the bellows. A pair of headgear strap flanges can also be molded integrally with the ventilation interface. The nasal prongs provide a first sealing interface between an outer surface of the nasal prongs and an inner surface of the patient's nares. The bellows provides a second sealing interface between a top surface of the bellows-like structure and a bottom surface of a patient's nose. The headgear strap flanges provide a third sealing interface between the ventilation interface and a mustache region of the patient's face as well as a bottom surface of the patient's nose.

Devices, systems and methods support tissue in a body organ for the purpose of restoring or maintaining native function of the organ. The devices, systems, and methods do not require invasive, open surgical approaches to be implemented, but, instead, lend themselves to catheter-based, intra-vascular and / or percutaneous techniques.

An apparatus for applying sealant to a target tissue of a surgical site is provided. The apparatus includes a handle, conduit and an end effector. The handle has means configured and adapted for operating the end effector and dispensing biological sealant to the surgical site via the end effector. The conduit stores and / or carries sealant towards the end effector. The end effector is configured to clamp around a body organ or tissue and apply and confine biological sealant in a substantially uniform manner thereto.