Entries |
Document | Title | Date |
20080312639 | Hardened polymeric lumen surfaces - Apparatuses, systems, and methods for surface modification of catheters. The surface modification can be localized to a lumen surface of the catheter. The surface modification to the lumen surface extends radially into the catheter body a predetermined distance to provide a hardened zone having a hardness that is greater than a hardness of an exterior surface of the catheter body. | 12-18-2008 |
20090054874 | MULTI-LUMEN CATHETER INCLUDING A LUMEN HAVING A VARIABLE CROSS SECTIONAL AREA - A multi-lumen catheter configured for insertion into the vasculature of a patient for fluid infusion into or fluid aspiration from the patient is disclosed. The multi-lumen catheter includes one or more cross sectionally variable lumens, wherein the cross sectional area of the lumen(s) may be selectively increased, particularly during fluid infusion, in order to enable relatively greater fluid flow rate therethrough. In one embodiment, the multi-lumen catheter includes a deformable first septum for providing an increased cross sectional area for a lumen under high flow rate pressurization, such as power injection. A deformable second septum also deforms to allow for first septum deformation and additionally provides an urging force to restore the first septum to an un-deformed state once lumen pressurization has ceased. In another embodiment, a bi-positional septum is used to selectively increase the cross sectional area of a lumen of the catheter during power injection. | 02-26-2009 |
20090099549 | Sheath - A sheath shaped and dimensioned for reducing trauma and easing insertion thereof includes an inner sheath member shaped and dimensioned to fit around a guidewire in a manner permitting relative movement, the inner sheath member including an inner sheath tip having a primary bevel and a circumferential conical surface. The sheath also includes an outer sheath member shaped and dimensioned to fit around the inner sheath member in a manner permitting relative movement. The outer sheath member includes an outer sheath tip having a primary bevel and a circumferential conical surface. | 04-16-2009 |
20090112186 | Catheter assembly with increased torsional stiffness - A catheter assembly having improved torsional stiffness. In one embodiment, the assembly includes a medical catheter and a torsional stiffener. The medical catheter may be a tubular member made of a soft, flexible, biocompatible material that may be shaped to include a first end, a second end, a side wall and a longitudinal bore. The first end, which may be implanted within a patient, may be shaped to include an internal bolster. The torsional stiffener, which may be coaxially encapsulated within the side wall of the catheter, may be a tubular member shaped to include a first end, a second end, a side wall and a longitudinal bore. One or more transverse openings may be provided in the side wall of the stiffener to endow the stiffener with a desired degree of lateral flexibility while still maintaining a desired degree of torsional stiffness. As a result, the stiffener augments the torsional stiffness of the catheter without detracting substantially from the flexibility of the catheter. | 04-30-2009 |
20090131911 | Variable Stiffness Guidewire Systems - A variable-stiffness guidewire system which comprises an elongated flexible guidewire. The guidewire has a body and a guidewire head coupled to the body. The guidewire head is slidably moveable with respect to a guidewire collar of the body to adjust a stiffness of the guidewire. A tool is utilized with the guidewire to engage the guidewire head and move the guidewire head a desired distance from the guidewire collar to achieve a desired stiffness. The tool has a first mechanism that is configured to selectively deploy an insert to be positioned between the guidewire head and the guidewire collar. The insert maintains the desired stiffness of the guidewire. | 05-21-2009 |
20090131912 | Variable Stiffness Guidewire Systems - A variable-stiffness guidewire system comprises an elongated flexible guidewire having a body and a guidewire head that is coupled to the body. The guidewire head is slidably moveable with respect to a guidewire collar of the body to adjust a stiffness of at least a portion of the guidewire. An insert is coupled to the guidewire and positioned between the guidewire head and the guidewire collar. The insert has a cross-sectional dimension no larger than a diameter of the body. The insert is configured to maintain a distance of the guidewire head from the guidewire collar to maintain a desired stiffness in the at least a portion of the guidewire. | 05-21-2009 |
20090149834 | REINFORCED ENTERAL FEEDING CATHETER - An enteral feeding catheter includes inner and outer layers of tubes and a spring positioned between them. The inner and outer tubes are coupled together so that the spring is held between them. The spring includes a helical wire and the distance between each adjacent coil is driven to equal the thickness of the wire. The combined thickness of the first and second tubes is less than or equal to the thickness of the wire. | 06-11-2009 |
20090149835 | MEDICAL DEVICE INCLUDING A METALLIC SUBSTRATE COMPONENT ATTACHED TO A POLYMERIC COMPONENT AND ASSOCIATED METHODS - A medical device including a medical device metallic substrate component, with perforations therethrough, attached to a medical device polymeric component abutting the thin metallic film component. The medical device also includes a polymeric sleeve covering the perforations and at least a portion of the polymeric component abutting the metallic substrate component. Moreover, the polymeric sleeve intrudes into the perforations and joins the metallic substrate component to the polymeric component. A method for attaching a medical device metallic substrate component to a medical device polymeric component includes forming a plurality of perforations in the medical device metallic substrate component and abutting the medical device polymeric component against the medical device metallic substrate component. Subsequently, a polymeric sleeve is applied over the perforations and at least a portion of the abutted medical device polymeric component. Heat and/or pressure is then applied to the polymer sleeve in a manner that results in the polymer sleeve being joined to the medical device metallic substrate and the portion of the abutted medical device polymeric component and the polymer sleeve flowing into the perforations, thereby attaching the medical device metallic substrate component to the medical device polymeric component. | 06-11-2009 |
20090198218 | NEUROSURGICAL INSTRUMENTS - A catheter assembly for insertion into the brain. The assembly comprises a first length of tubing made of a first material. A second material surrounds the first length of tubing, the second material being more flexible than the first material and having a hardness of less than 50 Rockwell E. The second material provides damping to the first length of tubing. | 08-06-2009 |
20090198219 | Catheter Assembly - Novel catheter constructions comprising thin covering or wrapping materials such as polymer films. A catheter provided with a guidewire catheter lumen having a thin covering that is easily punctured by a guidewire at virtually any desired point along the catheter length. The thin covering may be integral with the catheter shaft, or may be a separate component that covers only the portion of the catheter shaft immediately adjacent the outer portion of the guidewire lumen, or may be a thin tubular construct that surrounds the entire catheter shaft. Moreover, polymer film can be used in combination with one or more elements to produce novel catheter constructions. | 08-06-2009 |
20090264863 | Articulating Tip Tetherless Catheter System - A catheter system includes a concentrically arranged proximal catheter and an inner catheter; a conical tip attached to a distal end of the inner catheter; and at least one articulating assembly disposed on the catheter. The articulating assembly includes a distal ring attached to the inner catheter adjacent a proximal end of the conical tip and a proximal ring having a wedge shaped cross section attached to the distal end of the proximal catheter. A method for navigating a vascular system includes providing a catheter system, navigating the distal end of the catheter through the vascular system; determining a change in direction of the distal end of the catheter; and manipulating the at least one articulating assembly so that a distal ring and a proximal ring are rotated relative to each other and the angle of the distal tip relative to a long axis of the catheter has been altered | 10-22-2009 |
20090270838 | Catheter Flushing Mandrel - A mandrel includes a mandrel body with a proximal major diameter barrel section, a diameter reducing/tapered portion and a distal minor diameter barrel section. The tapered portion connects the proximal major diameter barrel section and distal minor diameter barrel section. The proximal major diameter barrel section has a major diameter, the distal minor diameter barrel section has a minor diameter, the minor diameter less than the major diameter. The minor diameter is less than a diameter of an inner lumen of a coaxial catheter, and the major diameter exceeds the inner diameter of the outer lumen guidewire exit port of the coaxial catheter, and the tapered portion is sized to form a fluid seal the inner diameter of the outer lumen guidewire exit port. The distal minor diameter barrel section of the mandrel occupies and substantially seals and prevent flow through it to the catheter distal end guidewire entry port. | 10-29-2009 |
20100030192 | CATHETER SHAFT BOND ARRANGEMENTS AND METHODS - A catheter shaft bond arrangement includes a first catheter shaft defining a first lumen, a second catheter shaft defining a second lumen, and a first bonding member. The first bonding member is configured to bond with the first and second catheter shafts to create a molded bond upon application of heat to the first bonding member. The molded bond provides a fixed axial and radial orientation of the first and second catheter shafts relative to each other. The molded bond can be generated in some arrangements without the use of the first bonding member. In other arrangements, two or more bonding members can be used to create the molded bond. | 02-04-2010 |
20100036363 | MICROCATHETER - In a microcatheter, a shaft tube thereof is sectioned into a proximal zone, an intermediate zone, and a distal zone from a connector to the forward end thereof, each being formed of a multilayered tube, including three types of multilayered tubes different in hardness, an inner layer extending along all the zones from the proximal zone to the distal zone of the shaft tube, and a reinforcing material being fitted to the outer circumference of the inner layer, a first outer layer extending along all the zones from the proximal zone to the distal zone of the shaft tube so as to coat, and adhere to, the inner layer and the reinforcing material, to form a base layer structure of the inner layer/reinforcing material/first outer layer, a third outer layer coating the first outer layer of the base layer structure in the proximal zone, a second outer layer coating the first outer layer of the base layer structure in the intermediate zone. | 02-11-2010 |
20100063478 | FORCE-SENSING CATHETER WITH BONDED CENTER STRUT - A force-sensing catheter for diagnosing or treating the vessels found within a body or body space includes a center strut that is bonded, preferably thermally, along its longitudinal axis with the thermoplastic tubular member within which it is housed. The tubular member preferably has three layers: an inner layer, a braided layer and an outer layer. One or more semiconductor or metallic foil strain gages are affixed to the center strut in order to provide a measure of the bending and torsional forces on the distal tip of the catheter. Temperature compensation is achieved by having a temperature sensor near the strain gages and calibrating the catheter over a range of temperatures. | 03-11-2010 |
20100076405 | ENDOVASCULAR SHEATH WITH GRADABLE STIFFNESS DEVICE AND METHOD - An endovascular sheath apparatus | 03-25-2010 |
20100094257 | INVENTORY SPARING CATHETER SYSTEM - Some embodiments relate to a catheter system having a changeable or adjustable working length. The catheter system can comprise a proximal end, a distal end, and a first axial lumen configured to receive a guidewire formed through at least a portion of the catheter body. A first opening can be formed through a portion of the catheter body and be in communication with the first lumen. The sheath can be rotatable, axially movable, or otherwise changeable from at least a first position to a second position, wherein the sheath can substantially cover the first opening in the catheter body in the first position, and can substantially expose the first opening in the catheter body in the second position. | 04-15-2010 |
20100114070 | Methods and devices for providing oxygenated blood distal to an obstruction - The catheter is positioned within an obstruction so that the distal end is positioned distal to the obstruction and proximal openings are positioned proximal to the obstruction. Blood enters the proximal openings and passes through the lumen to the distal end to perfuse blood distal to the obstruction. | 05-06-2010 |
20100121312 | Catheter Shaft - The invention relates to a method for the production of at least one longitudinal section of a catheter, wherein the method comprises the winding of film, and the film is provided in the form of strips, the film strip is wound in the manner of a screw such that the side edges of the film strip extending in the manner of a thread overlap the film strip, and further a bonded connection is created in the overlapping region such that the longitudinal section has a closed and at least fluid-tight surface. The invention further relates to a catheter produced according to the method, and a device for carrying out the method. | 05-13-2010 |
20100137837 | PREVENTION OF KINKS IN CATHETER IRRIGATION TUBES - A medical device includes an insertion tube, having a distal end for insertion into a body of a subject and an opening at the distal end. A lumen, which includes a flexible tube which passes longitudinally through the insertion tube so as to communicate with the opening at the distal end of the insertion tube, is secured under tension inside the insertion tube. | 06-03-2010 |
20100145309 | RETRACTABLE CATHETER - A retractable catheter for use in an implant delivery system, the catheter including an elongate tubular sheath made of a relatively flexible material, and a pull element for transmitting a pull force to the sheath to retract it longitudinally. The pull element includes an end portion disposed in the relatively flexible material, at least the thickness of the end portion being substantially less than its length. | 06-10-2010 |
20100168716 | Medico-Technical Device for At Least Partially Introducing Into a Body Passage - The invention relates to a medico-technical device for at least partially introducing into a body passage. Said device comprises an elongate, tubular, flexible internal body ( | 07-01-2010 |
20100168717 | MULTI-LUMEN MEDICAL DEVICES AND METHODS OF MANUFACTURING SAME - A method of manufacturing a catheter shaft includes extruding an inner polymeric layer having a main lumen and two or more side lumens spaced about the main lumen; forming an outer polymeric layer about the inner polymeric layer; and inserting at least one elongate member, such as a wire, through each side lumen of the inner polymeric layer. The side lumens are less than about ⅕ the size of the main lumen. The method may further include the step of forming a braided layer between the inner polymeric layer and the outer polymeric layer. In an alternate embodiment, the method includes co-extruding an inner polymeric layer and a multi-lumen layer, the multi-lumen layer having two or more side lumens; forming an outer polymeric layer about the multi-lumen layer; and inserting at least one elongate member through each side lumen. Catheter assemblies made according to the described methods are also disclosed. | 07-01-2010 |
20100198193 | POLYMER SHRINK TUBES AND NOVEL USES THEREFOR - Novel polymer shrink tubes, such as fluoropolymer shrink tubes and novel uses thereof. The polymer shrink tubes include at least one three-dimensional pattern formed along at least a portion of the inner surface of the tube. The polymer shrink tubes can be used for, for example, embossing a pattern into a polymer tube. Further use includes, for example, forming a catheter with at least one channel located in the catheter wall. | 08-05-2010 |
20100211046 | MEDICAL DEVICE WITH STIFFENER WIRE FOR OCCLUDING VASCULAR DEFECTS - Embodiments of the present invention provide devices and methods for treating various target sites. For example, one exemplary device includes a tubular structure having proximal and distal ends and at least one layer of braided material configured to facilitate thrombosis. The tubular structure includes an end section at the proximal or distal end having a cross-sectional dimension that is larger than that of an opening of the target site. The device also includes a stiffener wire coupled to the tubular structure, wherein the wire is configured to extend at least partially through the opening and facilitate securing the end section over the opening. The tubular structure and stiffener wire include respective preset, expanded configurations and are configured to be constrained to respective reduced configurations for delivery to the target site and to at least partially return to their respective preset, expanded configurations at the target site when unconstrained. | 08-19-2010 |
20100211047 | APPARATUS AND METHODS FOR MAKING COATED LINERS AND TUBULAR DEVICES INCLUDING SUCH LINERS - A medical device includes a proximal end, a distal end sized for introduction into a body lumen, and a lumen extending between the proximal and distal ends. The tubular device includes an inner liner including a coating on an inner surface thereof, a reinforcing layer surrounding at least a portion of the liner; and an outer layer surrounding the reinforcing layer and inner liner. The liner and outer layer may include multiple sections having different properties than one another, adjacent sections attached together by seams, which may be offset from one another. Apparatus and methods for making tubular devices with coated liners are also provided. | 08-19-2010 |
20100298813 | Method and apparatus for extensible intravenous drip line - The extensible intravenous (“i.v.”) drip line tubing uses a helical accordion support structure on which the i.v. tubing is attached. The helical accordion backbone has some tendency to spring back, but this is not relied upon to extend and return the i.v. tubing it carries. The carrier structure keeps the i.v. tubing from getting tangle or kinked. A centrally located retractable line, which is located within the center of the helical accordion structure, acts as the retracting mechanism, as it tends to allow the accordion structure to be pulled into an extended position, while upon rewinding the central cord, the helical accordion support structure can be pushed toward a collapsed position without the i.v. drip line tubing becoming tanked, kinked, and thereby blocked. As a safety feature, so the i.v. line does not encounter and strain between it and the point of entry of the i.v. line into the patient, is one or more wrist and or armbands to which the i.v. carrier is attached by a short, strong line. | 11-25-2010 |
20110034904 | CATHETER HAVING IMPROVED BONDING REGION - A catheter having a flexible outer tube and a lubricious inner tube bonded within the flexible outer tube. One catheter has a distal outer tube formed of a substantial portion of a first, flexible material, an inner tube having a lubricious inside wall surface formed of a second, lubricious material, and an outer tube wall surface compatible with heat bonding the inner tube outside wall surface to the outer tube wall surface. A preferred flexible material is polyether block amide (PEBA) and a preferred lubricious material is polyethylene. One catheter utilizing the invention includes a flexible distal outer tube having an orifice through the tube wall and an inner tube inserted through the orifice having a lubricious inner layer surrounded by a tie-layer, surrounded in turn by the same flexible material forming the outer tube. One catheter has a PEBA outer tube heat bonded to a tri-layer inner guide wire tube formed of a polyethylene inner layer, a PEBA outer layer, and a PLEXAR™ tie-layer disposed between the inner and outer layers. | 02-10-2011 |
20110066139 | INSERTION FACILITATION DEVICE FOR CATHETERS - Devices that facilitate insertion of tube-like structures, e.g., catheters and other medical devices, into passages in mammalian bodies, e.g. in the human body. Devices according to various embodiments of the invention provide greater stiffness and/or rigidity to elongated tube-like structures. According to some embodiments, a portion or the entire insertion facilitation device can be removed from the tube-like structure after insertion thereof. According to some embodiments of the invention, an insertion facilitation device comprises a releasable engagement arrangement to releasably engage the stiffener and a tube-like structure to inhibit or prevent relative motion between the stiffener and tube-like structure. | 03-17-2011 |
20110077620 | Guide Catheters - High performance guide catheters are described as suitable for neurovascular access. They are constructed using a machined core, in which the core includes transition features from a proximal to distal-most section of the device. | 03-31-2011 |
20110082442 | EXTERNALLY REINFORCED PERCUTANEOUS GASTROSTOMY TUBE WITH CUSTOMIZABLE SMOOTH TUBE LENGTH - The length of a reinforced tube that is made of a fluid-tight tube with an external helical support structure and an elastomeric material disposed at least in the trough between successive turns of the helical support can be adjusted by peeling a strip of the elastomeric material away from the trough. This renders a portion of the helical support structure usable as an external thread, after which an internally threaded structure can be screwed down onto the helical support structure. | 04-07-2011 |
20110144624 | SLEEVE APPLICATOR TOOL - Described herein is an applicator tool for sleeving an elongated device, the tool including a hollow, continuous base section, at least two arm members extending laterally from the base section, the arm members and the base section defining an axial passage extending therethrough, and an elastomeric sleeve positioned over a portion of an outer peripheral surface of the arm members and axially aligned with the axial passage, wherein each arm member is radially flexible such that the axial passage can be radially compressed or expanded, and wherein the axial passage allows for a movable positioning of the elongated device. | 06-16-2011 |
20110224650 | CATHETER - A catheter comprising a sheath to be inserted into a living body, wherein the sheath includes a tubular reinforcement layer of at least one layer, which is formed with a spiral slit continuous from the distal side to the proximal side thereof; a termination end of the spiral slit is provided on the proximal side of the slit proximal portion at the site of the proximal side of the spiral slit; and at the same time, there is formed a slit termination portion in which inclination angle of the spiral slit with respect to the circumferential direction of the reinforcement layer is larger than that of the slit proximal portion | 09-15-2011 |
20110238040 | INFUSION CATHETER WITH COMPOSITE TIP - A catheter for use with a medical infusion or other fluid system. The catheter may include a flexible elongate tubular core that is resistant to radial collapse, and a separate tubular tip member forming the catheter distal tip. The catheter may further include a flexible, e.g., elastomeric, jacket that surrounds at least a portion of the tubular core. The jacket may have a radial compliance that is greater than that of the tubular core. The jacket may further define an outer diameter that is about 4 to about 6 times greater than an outer diameter of the core. | 09-29-2011 |
20110245806 | REINFORCED MULTI-LUMEN CATHETER AND METHODS FOR MAKING SAME - Methods for manufacturing multi-lumen catheter tubes are disclosed. The described methods may be employed to manufacture a reinforced catheter tube suitable for use in power injectable and torqueable multi-lumen catheters, for example. In one embodiment, a method for manufacturing a multi-lumen catheter tube comprises first clamping a flexible sheet of catheter tube material between first and second mandrels. The mandrels may be D-shaped, or may include another suitable cross sectional profile. The first and second mandrels are rotated with respect to the flexible sheet so as to wrap the flexible sheet about the mandrels. Adjacent portions of the flexible sheet are joined along a longitudinal length thereof to define a closed catheter tube including first and second lumens. The first and second lumens may conform to the D-shaped profile of the respective mandrels. | 10-06-2011 |
20120150150 | Tube assembly and method for making the assembly - A tube assembly including a flexible tube joined to a connector with the tube having an insert liner located therein at least in an area of a distal end of the connector that provides improved retention force between the tube and connector. Methods for preparing the tube assembly are disclosed and include the use of adhesives or solvent for bonding the tube to the connector. | 06-14-2012 |
20120203206 | Methods and Apparatus for Inserting Multi-Lumen Split-Tip Catheters Into a Blood Vessel - Methods and apparatus are disclosed for inserting flexible, multi-lumen catheters into blood vessels, and in particular, for inserting flexible, split-tip catheters into blood vessels. The invention accomplishes these objects by temporarily stiffening each catheter lumen and tip independently through use of intra-catheter stiffener elements disposed within the catheter lumens. This provides means for advancing the catheter/stiffeners assembly through a subcutaneous tunnel, and over a plurality of guidewires until a distal tip of the catheter is at a desired position within the vessel. The intra-catheter stiffener elements are sufficiently stiffening to allow advancing the catheter over guidewires, but sufficiently flexible to allow bending and looping of the catheter for proper placement within the vessel. | 08-09-2012 |
20130090630 | Insertion facilitation device for catheters - Devices that facilitate insertion of tube-like structures, e.g., catheters and other medical devices, into passages in mammalian bodies, e.g. in the human body. Devices according to various embodiments of the invention provide greater stiffness and/or rigidity to elongated tube-like structures. According to some embodiments, a portion or the entire insertion facilitation device can be removed from the tube-like structure after insertion thereof. According to some embodiments of the invention, an insertion facilitation device comprises a releasable engagement arrangement to releasably engage the stiffener and a tube-like structure to inhibit or prevent relative motion between the stiffener and tube-like structure. | 04-11-2013 |
20130090631 | MEDICAL DEVICE DELIVERY APPARATUS - The disclosure pertains to apparatus for intravascular delivery of medical devices past a juncture which requires an abrupt change of direction and methods of use therefor. The apparatus employs a directing element which deflects the medical device from an initial path to a second path. In some embodiments, the apparatus comprises more than one directing element and may be capable of redirecting by deflection more than one medical device. | 04-11-2013 |
20130116659 | MEDICAL DEVICE WITH BI-COMPONENT POLYMER FIBER SLEEVE - An elongate medical device having a longitudinal axis and a surface; and a continuous, helical bi-component fiber wound around at least a portion of the surface of the medical device along its longitudinal axis, wherein the bi-component fiber has a cross-section with a generally flattened side and an inner core encased in a sheath, and wherein the inner core is aligned about the medical device. | 05-09-2013 |
20130237962 | CATHETER ASSEMBLY - Provided is a catheter assembly that can increase the degree of freedom for selecting a guide wire to be used. The catheter assembly includes an outer catheter and an inner catheter. The outer catheter is a catheter for introducing a balloon catheter or the like to an affected area and the inner catheter is an insertion-assisting tool that assists insertion by preceding the insertion of the outer catheter when being inserted in a human body. An inner opening by which a guide wire tube hole of the inner catheter is opened at a proximal end side and an outer opening by which the outer tube hole of the outer catheter is opened at a proximal end side are formed at the middle position in the axial line direction, and the openings are formed at an angle with respect to the axial line directions at positions on the same line. | 09-12-2013 |
20130304033 | DIALYSIS CATHETER - 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. | 11-14-2013 |
20130331820 | CATHETER WITH SPIRAL SLIT TERMINATING IN SLIT TERMINATION PORTION ORIENTED TO SUPPRESS CRACK OCCURRENCE - A catheter comprising a sheath to be inserted into a living body, wherein the sheath includes a tubular reinforcement layer of at least one layer, which is formed with a spiral slit continuous from the distal side to the proximal side thereof; a termination end of the spiral slit is provided on the proximal side of the slit proximal portion at the site of the proximal side of the spiral slit; and at the same time, there is formed a slit termination portion in which inclination angle of the spiral slit with respect to the circumferential direction of the reinforcement layer is larger than that of the slit proximal portion | 12-12-2013 |
20140081243 | COLLARLESS GUIDE EXTENSION CATHETER - Embodiments of the disclosure describe an example guide extension catheter. The guide extension catheter may include a proximal shaft having a proximal end, a distal end, the distal end having an attachment region. The guide extension catheter may further include a distal sheath having a proximal end, a distal end and a lumen extending therebetween. The distal sheath may include an outer layer, inner layer and an intermediate reinforcing member disposed between the inner layer and the outer layer. Moreover, the distal sheath is attached to the attachment region adjacent to the reinforcing member. | 03-20-2014 |
20140142551 | METHOD OF PRODUCING CATHETER TUBE AND CONTINUOUS BODY OF THE SAME - A method of producing a catheter tube allows a plurality of catheter tubes to be continuously produced using a common core rod, with a proximal end connecting part efficiently attached. The method involves: forming a tubular body on the core rod including an inner layer covering body and an outer layer covering body; attaching a proximal end connecting part, forming a cylindrically shaped hub to a proximal end of the catheter tube, to a radially outer side of the inner layer covering body and the outer layer covering body; severing a tubular continuous body obtained on the core rod is severed at a given position after the proximal end connecting part is attached to produce a plurality of single tubes, each of which is provided with one of the hubs; and removing the core rod from the single tube. | 05-22-2014 |
20150290383 | DIALYSIS CATHETER - A dialysis catheter including a first portion having a first diameter, an elongated distal portion having a second smaller diameter, and a transition portion The first portion includes first and second independent blood withdrawal lumens extending in the first portion, the first withdrawal lumen terminating in the transition portion in a first terminal opening and the second withdrawal lumen terminating in a second terminal opening, the first and second terminal openings being radially spaced and axially adjacent. A longitudinally extending blood delivery lumen extends in the first portion and terminates in a delivery opening in the distal portion of the catheter, the first and second terminal openings positioned proximally of the delivery opening and each of the first and second terminal openings having a curved wall surrounding a portion of the terminal opening. | 10-15-2015 |
20160058971 | CATHETER DEVICES AND METHODS FOR MAKING THEM - Catheters, sheaths, or other tubular devices are provided that include a proximal end, a distal end sized for introduction into a patient's body, and a steerable distal portion. The tubular device includes a primary lumen extending between the proximal and distal ends; an auxiliary lumen adjacent the primary lumen; and one or more reinforcement members including windings extending helically along at least the distal portion, at least some of the windings passing between the primary and steering element lumens and at least some of the windings surrounding both the primary and steering element lumens. In one embodiment, a steering element is slidably disposed within the auxiliary lumen. Apparatus and methods for making such tubular devices are also provided. | 03-03-2016 |
20160129221 | MEDICAL DEVICE HAVING AN ATRAUMATIC DISTAL TIP - A delivery catheter includes a soft, atraumatic distal tip. The distal tip is configured to transition from a folded configuration to an unfolded configuration during delivery of a medical device. A wall thickness of the distal tip may be increased such that the distal tip is biased to remain in the unfolded configuration after delivery. Additionally, the increased wall thickness in a selected region of the distal tip may cause the distal tip to resist and/or prevent collapse of the distal tip during retrieval and/or repositioning of the medical device when the medical device comes into contact with a distal end of the catheter. The distal edge of the distal tip may be rounded so as to prevent the distal tip from damaging tissue during advancement of the catheter to a target location within a patient's body. | 05-12-2016 |
20160158491 | Multiple Wall Dimensionally Recoverable Tubing for Forming Reinforced Medical Devices - A multi-layered dimensionally recoverable tubing system and method for making the same, in which the system has a first layer, a second layer, and a reinforcing structure. The first layer includes at least one crosslinkable polymer. The second layer is disposed adjacent to the first layer and includes a polymer. A reinforcing structure is disposed adjacent to the first layer. One or both of the first layer and second layer are dimensionally recoverable. The first layer is substantially crosslinked, and the second layer is substantially uncrosslinked. To form a reinforced medical device, the system is heated and dimensionally recovered, where the reinforcing structure becomes incorporated in the second layer. | 06-09-2016 |
20160375222 | MEDICAL TUBE - A medical tube including a flexible tube-shaped main body, a hub connected to the proximal portion of the tube-shaped main body, and a strain relief member supported at a distal portion of the hub. The strain relief member surrounds a predetermined portion of the proximal portion of the tube-shaped main body. The tube-shaped main body includes a flexible portion which possesses increased flexibility for bending. The flexible portion includes at least one groove extending in a circumferential direction in the outer circumferential surface of the tube-shaped main body over a predetermined range in an axial direction of the tube-shaped main body from a position distal of the distal-most end of the strain relief member to a position proximal of the distal-most end of the strain relief member. | 12-29-2016 |