2957results about "Guide wires" patented technology

An intravascular device includes a tube member. The tube member comprises a distal portion and a proximal portion. Each of the distal portion and the proximal portion of the tube member comprises a plurality of cuts circumferentially extending around a longitudinal axis of the tube member. The plurality of cuts of the distal portion of the tube member comprises a first pitch, a first cut length, and a first uncut length, the plurality of cuts of the proximal portion of the tube member comprises a second pitch, a second cut length, and a second uncut length, and the first pitch is less than the second pitch, the first cut length is greater than the second length, and the first uncut length is less than the second uncut length.

Optical-fiber stylet holders and methods for holding optical-fiber stylets in position in catheters or the like prevent breakage of optical fibers in the optical-fiber stylets and maintain functionality of the optical-fiber stylets. The holding of optical-fiber stylets in position in catheters or the like can be important for maintaining distal tips of intravascularly delivered optical-fiber stylets in their target anatomical locations during procedures.

Rapidly insertable central catheter (“RICC”) assemblies include a RICC and an introducer. The RICC can include a soft catheter tube having an introducing aperture that opens into a primary lumen of the RICC. The introducer can include an introducer catheter including a hard catheter tube having an introducing hole that opens into a single lumen of the introducer catheter. When the RICC assembly is in a ready-to-deploy state, the introducer catheter is disposed in the primary lumen of the RICC such that a distal end of the introducer catheter extends past a distal end of the RICC. An introducer needle of the introducer can be disposed in the introducer catheter through both the introducing aperture and the introducing hole such that a beveled tip of the introducer needle extends past the distal end of the introducer catheter.

Systems and methods for providing a blood pump system having a variable stiffness distal extension are disclosed. A variable stiffness distal extension may have at least one section of continuously varying stiffness, resulting in a stiffness profile that decreases in a distal direction along a length of the distal extension. The varying stiffness may be accomplished by varying one or more radial dimensions of the extension. For example, in some implementations, an outer diameter of a distal extension may decrease along at least a portion of a distal extension. The distal extension may include a lumen configured to receive a longitudinally extending element.

A robotic drive system includes a drive table having a main body and an extendable member configured to be at least partially received within the main body and being extendable from an end of the main body. One or more hub adapters are coupled with the drive table and are configured to couple to a corresponding hub so that axial movement of the one or more hub adapters drives the corresponding hub.

An introducer can include an introducer needle and an introducer sheath having a transition therebetween that eases tissue over a distal end of the introducer sheath without catching tissue thereon tissue despite an excised portion of the introducer needle. The introducer needle can include a needle shaft having a longitudinal needle slot extending from a proximal portion of the needle shaft through a distal needle tip, which results in an excised portion of a heel of a bevel of the needle tip. The introducer sheath can include a sheath body and a tapered sheath tip. The sheath body can be over the needle shaft sealing the needle slot thereunder but for a sheath-body opening in a proximal portion of the sheath body for an access guidewire. The introducer can include the transition from the bevel of the needle tip to at least the taper of the sheath tip.

Polymeric tubing, for use with catheters or other medical devices, where the polymeric tubing can have regions of customized properties including, but not limited to, durometer, torque control, flexibility, axial strength, stiffness, etc. One variation of the device allows for transitions between regions to be configured such that there can be gradual or customized transitions between various regions such that the structural characteristics differential between the regions are selectively designed. Additional variations include outer layers having a plurality of material sections extending in a spiral direction along the axial length to form a continuous wall of the outer layer. In certain variations, the structural characteristic differential is minimized or eliminated as compared to conventional catheters.

A rigidizing device includes an elongate flexible tube, a braid layer positioned over the elongate flexible tube, an outer layer over the flexible tube and the braid layer, and an inlet between the elongate flexible tube and the outer layer and configured to attach to a source of vacuum or pressure. The braid layer has a plurality of strands braided together at a braid angle of 5-40 degrees relative to a longitudinal axis of the elongate flexible tube when the elongate flexible tube is straight. The rigidizing device is configured to have a rigid configuration when vacuum or pressure is applied through the inlet and a flexible configuration when vacuum or pressure is not applied through the inlet. The braid angle is configured to change as the rigidizing device bends when the rigidizing device is in the flexible configuration.

A rigidizing device includes a plurality of layers and an inlet between the elongate flexible tube and the outer layer and configured to attach to a source of vacuum or pressure. The rigidizing device is configured to have a rigid configuration when vacuum or pressure is applied through the inlet and a flexible configuration when vacuum or pressure is not applied through the inlet.

A guidewire for backloading and inserting a percutaneous pump affixed to a cannula includes a proximal section made of a first material, with a first diameter, a rounded proximal end, and a distal end. The guidewire also includes a distal section made of a second material, with a second diameter which is greater than the first diameter, a distal end, and a proximal end abutting the distal end of the proximal section. The first material of the proximal section is selected to be softer than a material of the percutaneous pump to reduce damage to the pump during backloading. The distal section of the guidewire is configured to be stiffer than the proximal section to insert the percutaneous pump in a desired location without damaging the guidewire.

An atraumatic vessel occlusive system includes a flexible tubular member with an infusion lumen, a vessel occluder mounted at the distal end of the tubular member, and a pressure sensor located within a chamber defined by the occluder. The occluder has a braided construct provided with a fluid impermeable membrane over its proximal portion and a fluid permeable covering over its distal portion. The pressure sensor is adapted to sense pressure within the vessel through the fluid permeable membrane without being subject to the effects of turbulent flow at the exit of the infusion lumen. The accurately sensed pressure can be used to determine a dwell time for the occluder.

A drive system for achieving supra-aortic access and neurovascular treatment site access includes a guidewire hub configured to adjust an axial position and a rotational position of a guidewire, a procedure catheter hub configured to adjust an axial position and a rotational position of a procedure catheter, a guide catheter hub configured to adjust an axial position of a guide catheter, and an access catheter hub configured to adjust an axial position and a rotational position of an access catheter, the access catheter further configured to laterally deflect a distal deflection zone of the access catheter.

This disclosure relates to a catheter system for introducing a heart valve stent into the body of a patient. The catheter system includes a catheter tip having a seat portion for accommodating the stent in its collapsed state and a stent holder for releasably fixing the stent, wherein the seat portion is constituted by a first sleeve and a second sleeve, said sleeves being moveable relative to each other and relative to the stent holder, and a catheter shaft for connecting the catheter tip to a handle.

A guidewire device includes an elongate core wire and a tube member over the distal section of the elongate core wire. The tube member comprises a plurality of transverse cuts at a plurality of axial locations of the tube member, forming a plurality of circumferentially extending rings joined by a plurality of beams. The plurality of transverse cuts comprises a tapered geometry with a cut width at the outer surface of the tube member being greater than a cut width at the inner surface of the tube member.

The invention discloses a device for controllable acute-angle back bending of a micro guide wire in cerebrovascular interventional operation, and belongs to the technical field of interventional operation instruments, the device comprises a conveying catheter, a pushing structure is arranged in an inner cavity of the conveying catheter, the pushing structure can move in the inner cavity of the conveying catheter in the axial direction, the pushing structure comprises a pushing sleeve, the micro guide wire is arranged in the pushing sleeve, and the pushing sleeve is connected with the micro guide wire. The micro guide wire can slide and rotate in the conveying sleeve; a side crack hole is formed in the side part of the head end of the conveying catheter, the micro guide wire penetrates through the head end part of the pushing sleeve to be plastically bent into an arc-shaped section structure, is bent from the side crack hole and then extends out, and the pushing sleeve axially moves in the conveying catheter, so that the bending degree of the micro guide wire extending out of the side crack hole can be changed; and after the micro guide wire extends into the target blood vessel for a certain distance, the micro catheter follows the micro guide wire to enter the target blood vessel. The technical problem that a micro guide wire and a micro catheter are difficult to cross a reverse acute angle formed by a responsibility blood vessel and a mother blood vessel to enter a path blood vessel in a super-selection mode to conduct an operation can be solved.

A method of priming an interventional device assembly includes providing the interventional device assembly, the interventional device assembly including a first interventional device and a second interventional device, the second interventional device being positioned within the first interventional device. The method further includes reciprocally moving at least one of the first interventional device and the second interventional device relative to the other of the first interventional device and the second interventional device while flushing a lumen between the first interventional device and the second interventional device with fluid to remove microbubbles from the lumen.

An introducer can include an introducer needle (134) and an introducer sheath (136) having a transition therebetween that eases tissue over a distal end of the introducer sheath without catching tissue thereon tissue despite an excised portion of the introducer needle. The introducer needle can include a needle shaft (140) having a longitudinal needle slot (146) extending from a proximal portion of the needle shaft through a distal needle tip (144), which results in an excised portion of a heel of a bevel (150) of the needle tip. The introducer sheath can include a sheath body (162) and a tapered sheath tip (170). The sheath body can be over the needle shaft sealing the needle slot thereunder but for a sheath-body opening (166) in a proximal portion of the sheath body for an access guidewire.

The utility model discloses a micro guide wire, which relates to the technical field of instruments for interventional diagnosis and treatment and comprises a far-end component and a near-end component. The far-end component is arranged at the far end of the near-end component; the far-end part comprises an outer-layer spring, an inner-layer twisted wire and a developing wire; the developing wire and the inner-layer twisted wire are sequentially wound around the far end of the near-end component, and the developing wire is located on the side, close to the far end of the near-end component, of the inner-layer twisted wire. One end of the developing wire is connected with the far end of the near-end component, and the other end of the developing wire is connected with one end of the inner-layer twisted wire and the near-end component; the other end of the inner-layer twisted wire is connected with the near-end component; and one end of the outer-layer spring is connected with the far-end end part of the near-end part, and the other end of the outer-layer spring is connected with the outer wall of the near-end part. The far end is wound by a double-layer spring, the flexibility and the plasticity are both considered, the twisting control performance of the micro guide wire is guaranteed, the passing ability of the micro guide wire in a tortuous blood vessel is improved, the near end is made of stainless steel, and it is guaranteed that the whole micro guide wire has good supporting force and pushing performance.

A catheter configured for placement within a bodily lumen, comprises: a catheter sheath defining a first lumen for medical tools; and an exchange segment defining a second lumen for a guidewire. A proximal end of the exchange segment is joined with a distal end of the catheter sheath in a lengthwise direction forming an angle therebetween, such that the second lumen is laterally offset by a distance and angled with respect to the first lumen. When the catheter is placed within a patient's anatomy, the catheter sheath and / or the exchange segment straightens out so that the axis of the second lumen and the axis of the first lumen become substantially parallel to each other. The offset distance between the axes of sheath and exchange segment depends mainly on the diameter of the guidewire to be used, on the diameter of the sheath, and the angle of the junction.

A guidewire assembly configured to be deployed from an ancillary assembly. The guidewire assembly has a distal puncture tip extending from a deployed distal-shaped section configured to mitigate piercing tip touch back on a biological wall after the elongated guidewire assembly is deployed from the ancillary assembly, and the distal puncture tip crosses a biological wall.

The invention discloses a method and a system for detecting an antibacterial coating micro guide wire. The method comprises the following steps: applying a composite stress field to a guide wire to obtain stress distribution data; determining a stress response abnormal area according to the stress distribution data and applying dual-frequency vibration excitation to obtain nonlinear vibration response data and vibration energy dissipation data; force-sensitive fluorescent molecules are applied to the stress response abnormal area for treatment, and conformational changes of the stress response abnormal area are monitored to obtain preliminary spatial distribution data of the microcracks; injecting a multi-ion fluorescent tracer into the micro-crack area, and monitoring the migration rule of the multi-ion fluorescent tracer to obtain pH value distribution data and oxidation-reduction potential distribution data; bacterial suspension with specific fluorescence response is injected into the micro-crack area, and antibacterial activity evaluation data is obtained by monitoring the fluorescence response of the bacterial suspension. According to the technical scheme, the microcracks on the surface of the antibacterial coating micro guide wire are accurately detected and positioned, and the influence degree of the microcracks on the antibacterial function can be accurately evaluated.

A rigidizing device includes an elongate flexible tube having a lumen extending therethrough, a variable stiffness layer, a bladder layer configured to push against the variable stiffness layer when pressure is applied, and a hemostasis valve integrated at a proximal end of the elongate flexible tube in fluid communication with the lumen wherein the rigidizing device is configured to change between a flexible configuration and a rigid configuration in which the bladder layer limits the plurality of strand lengths from moving relative to each other when pressure is applied.

An IV device assembly may include a lumen forming a fluidic channel within the IV device assembly. The lumen may be fluidically coupled to a vascular access device (VAD) coupler via a funnel coupler, and an IV device assembly coupler at a proximal end of the lumen. The IV device assembly may also include one or more of the following: a collapsible sleeve formed coaxially around a first portion of the lumen and mechanically coupled to the funnel coupler, a probe formed along a second portion of the lumen within the collapsible sleeve and into the VAD coupler, a translation handle that translates the probe out of a distal end of the VAD coupler, and a fixed grip formed around the lumen to maintain a position of the IV device assembly relative to the translation handle.

The invention relates to the technical field of medical instruments, and discloses an interventional instrument delivery rotating device and conveying system.The interventional instrument delivery rotating device comprises a transmission mechanism, a delivery mechanism and a translation driving component, the transmission mechanism comprises a rotation driving component and a translation driving component, and the delivery mechanism is arranged at the top of the transmission mechanism; the delivery mechanism comprises a delivery driving wheel and a delivery driven wheel, the delivery driving wheel is matched with the rotary driving part and drives the delivery driving wheel to rotate through magnetic force so as to achieve synchronous rotation, and the translation driving part is used for driving the delivery driven wheel to move; compared with the prior art, through non-contact transmission of magnetic coupling, the driving side and the execution side are completely isolated, a pollution path is cut off from the physical structure, and the infection risk is greatly reduced.

A supra-aortic vessel access robotic control system includes a guidewire hub configured to adjust each of an axial position and a rotational position of a guidewire; a guide catheter hub configured to adjust a guide catheter in an axial direction; and a procedure catheter hub configured to adjust each of an axial position and a rotational position of a procedure catheter, and also to laterally deflect a distal deflection zone of the procedure catheter.

The utility model provides a nasogastroscope-guided gastrointestinal catheterization system based on a guide wire. The nasogastroscope-guided gastrointestinal catheterization system comprises a nasogastroscope (1), an imbedding tube (2) and the guide wire (3), wherein the guide wire (3) is arranged in an instrument cavity of the nasogastroscope (1); the implantation tube (2) is arranged along the guide wire (3) to a target jejunum nutrition tube putting position; the diameter of the guide wire (3) is 0.4 mm to 1.8 mm; the length of the guide wire is 1-7 m, and the section, 2-8 cm long, of the front end of the guide wire (3) is a flexible section (3.9). The utility model has the advantages of simple structure, simplification of catheterization operation, reduction of the pain of a patient, reduction of medical risks, guarantee of the success rate of catheterization, and excellent technical effect; the method has huge economic value and social value.

A sheath delivery system comprises an access device for insertion of one or more wires to extend in first and second directions within a blood vessel. The access device can include an elongated member with a lumen between a distal tip and proximal end, the lumen oriented to exit a patient, a footplate having a bore extending therethrough the footplate and configured to translate within the lumen between an initial state along the lumen and a rotated state anchoring the access device within a blood vessel, a first wire port through which a first wire enters and advances past the footplate into the blood vessel in a first direction, and a second wire port configured to guide a second wire into the lumen so that the second wire passes through the lumen and through the hollow bore of the footplate such that the second wire advances in the second direction.

The microcatheter comprises a protective tube, one end of the protective tube is fixedly connected with a tail tube, and the end, away from the tail tube, of the protective tube is provided with a catheter structure; the catheter structure comprises an outer tube fixedly connected with the protective tube, an inner tube is slidably connected into the outer tube, an elastic tube is fixedly connected to the end, away from the protective tube, of the inner tube, an expansion frame is embedded in the elastic tube, a driving sleeve is arranged on the protective tube, and the driving sleeve is fixedly connected with the inner tube. According to the endoscopic microcatheter, by arranging the catheter structure, when a reverse guide wire technology is started and a forward guide wire is introduced into the endoscopic microcatheter, the inner tube can be deduced to slide towards the forward guide wire, so that the inner tube extends out of the outer tube, then the expansion frame drives the elastic tube to expand, and the end face of the elastic tube can completely abut against the inner diameter of the forward guide wire; in this way, the forward guide wire can enter the reverse micro-catheter smoothly, and operation of medical staff is facilitated.

A percutaneous delivery tool includes a shaft, and proximal and distal capsules which move axially with respect to the shaft. A prosthetic valve includes a tubular portion, an upstream support portion extending therefrom and a plurality of flanges each having a respective flange end-portion. The prosthetic valve is restrainable by the delivery tool, such that the shaft and a downstream end of the tubular portion are disposed within the distal capsule, and the upstream support portion and the flange end-portions are disposed within the proximal capsule. Other embodiments are also described.

The invention relates to a ureteral access sheath (10) for insertion in the ureter (56) of a human or animal patient, wherein the access sheath (10) has, at a proximal end, an introduction portion (16) for a medical instrument and has an elongate portion (18) which extends from the proximal introduction portion (16) to a distal end (12) of the access sheath (10), wherein the elongate portion (18) comprises, over at least substantially the length of the elongate portion (18), at least one lumen (20) for guiding through the medical instrument. According to the invention, at least in some regions along the elongate portion (18), an elastically deformable cover element (22) is arranged on an outer wall of the lumen (20), wherein the cover element (22) can be deformed between a basic position, in which the cover element (22) rests against the outer wall of the lumen (20), and a guide-wire position, in which the cover element (22) is moved away from the outer wall of the lumen (20) by a guide wire (24) and forms a guide channel (26) for the guide wire (24).