556 results about "Lumen intima" patented technology

A system for preparation of an implant and ab interno insertion of the implant into an eye including a handle having one or more actuators and an elongated shaft having an outer sheath and an elongate member positioned within a lumen of the tubular outer sheath. The system includes a recess sized for holding a patch of material fixed relative to the handle and a cutting member movable relative to the handle and to the recess. The cutting member cuts the patch of material into an implant as the cutting member moves towards a cutting configuration. The implant, once cut, is axially aligned with the lumen of the tubular outer sheath. The inner elongate member is movable relative to the tubular outer sheath to advance the implant into a deployment position in the lumen of the tubular outer sheath for delivery into the eye. Related devices and methods are provided.

Devices and methods for providing a pathway for fluid to flow around a main lumen of a guide catheter are disclosed. As one example, a delivery apparatus can include a handle including an outer housing and a flush port coupled to the outer housing, a shaft extending distally from the handle, and a main lumen extending axially through the shaft, where the main lumen is fluidly coupled to the flush port via a flush lumen extending between the flush port and the main lumen. The delivery apparatus can further include at least one axially extending channel fluidly coupled to and radially offset from the main lumen, the channel extending between a first location that is adjacent to the flush lumen and a second location that is adjacent to a distal end of the shaft.

A tissue treatment system and method of using the tissue treatment system determines a size of a body lumen, or a neuromodulation parameter corresponding to the size of the body lumen. The tissue treatment system fills a balloon with a fluid when the balloon is within a body lumen. A fluid parameter of the fluid is detected over a period of time. A parameter curve of the fluid parameter is determined. The parameter curve includes the fluid parameter versus an independent variable over the period of time. The parameter curve includes inflections that correspond to changes in the fluid parameter. Based on the inflections, the system can determine the body lumen size or the neuromodulation parameter. Other embodiments are also described and claimed.

The invention relates to a simulation-based target removal area determination method and device. The method comprises the following steps: acquiring a heart simulation model and corresponding blood flow field information; according to the left heart lumen model and the blood flow field information, determining a first target area in the ventricular septum model; stress calculation is carried out according to the ventricular septum model, and a second target area in the ventricular septum model is determined; determining an initial target area according to the first target area and the second target area; according to the ventricular septum model, determining the thickness range of the initial target area at the end of contraction; determining a target cutting thickness according to a preset basic thickness and a thickness range; according to the heart simulation model, the initial target area, the target resection thickness and the blood flow field information, a first target resection area is determined. By adopting the method, the cardiac muscle tissue area needing to be cut off can be accurately determined.

The invention discloses a medical catheter surface strong interface bonding hydrogel coating method based on subsurface initiated polymerization. The method comprises the steps that firstly, a mixed solvent of an organic solvent and water is adopted for conducting swelling pretreatment on the surface of a catheter base material, so that polymer chains on the surface layer of the base material are relaxed; a solution containing initiator molecules is injected into the inner cavity of the catheter, so that the initiator is diffused and anchored in the subsurface area of the base material; preparing a hydrogel monomer solution containing a hydrophilic monomer, a cross-linking agent and a catalyst, and pouring the hydrogel monomer solution into the inner cavity of the catheter; and finally, sealing the two ends of the conduit, and initiating polymerization reaction under a specific temperature condition, so that the initiator anchored on the subsurface is decomposed to generate free radicals. The hydrogel coating and the catheter base material form a double combination effect of physical interlocking and chemical bonding through a subsurface initiated polymerization mechanism, the firmness and stability of the coating are remarkably improved, and the method is particularly suitable for modification of the inner surfaces of various medical catheters with complex structures.

A delivery system for delivering an implant having both a rigid portion and a flexible portion to a body lumen. The delivery system includes an outer tubular member and an inner tubular member slidably disposed within the lumen of the outer tubular member. The inner tubular member includes at least one opening positioned in a side wall adjacent to a distal end region. An expandable implant, including a rigid portion and a flexible portion, is disposed about the outer surface of the inner tubular member. A distal portion of a thread is wrapped around the flexible portion of the implant and configured to maintain the flexible portion in a radially collapsed configuration during delivery of the implant. A distal end region of the outer tubular member is disposed around the rigid portion of the implant to maintain the rigid portion in a radially collapsed configuration during delivery of the implant.

A stent, such as transluminal stent, is disclosed. The stent includes a tubular member with a proximal end, a distal end, and a central portion therebetween. The elongate tubular member comprises a scaffolding forming a plurality of cells and defining a lumen of the elongate tubular member. A proximal portion of the tubular member forms a retention member, wherein the diameter of the retention member is greater than the diameter of the central portion, and wherein a proximal end of the retention member includes an area of increased scaffolding density.

The invention discloses a locking structure balloon catheter system for trigeminal neuralgia and a using method of the locking structure balloon catheter system, and relates to the technical field of balloon catheters. The balloon is allowed to be filled only after the balloon catheter is conveyed to the preset position, so that the situation that the balloon is filled in advance due to misoperation is prevented, and the risk of misoperation is effectively reduced. The system comprises a puncture needle, a balloon catheter and a locking structure, the puncture needle is used for establishing a channel; the balloon catheter comprises a filling catheter, a balloon and a handle Luer connector assembly; the balloon is connected to the far end of the filling catheter, and the two ends of the handle Luer connector assembly are connected with the filling catheter and the injector respectively. The locking structure comprises an elastic sleeve which sleeves the outer wall of the filling guide pipe, and two ends of the elastic sleeve are fixedly connected to the outer wall of the filling guide pipe; when the elastic sleeve is located in the inner cavity of the puncture needle, the elastic sleeve deforms, and a fluid channel filling the catheter is closed; when the elastic sleeve is separated from the puncture needle inner cavity, the elastic sleeve restores to open the fluid channel; the invention further discloses a using method of the balloon catheter system.

A surgical system includes an ultrasound device and a surgical instrument. The ultrasound device includes a shaft having a body defining a longitudinal axis and including a lumen extending coaxially therethrough, and an ultrasound sensor assembly configured to enable ultrasound imaging of a field of view. The ultrasound sensor assembly is disposed at a distal end portion of the body of the shaft, offset relative to the longitudinal axis, and oriented such that the field of view is offset relative to the longitudinal axis. The surgical instrument is configured for removable insertion through the lumen of the body of the shaft and to extend distally from the distal end portion of the body of the shaft.

Medical devices and systems are described. The medical device may include a handle that includes a hub, a grip portion, and an arm. The hub may define a lumen having a proximal opening. The arm may extend proximally from the hub and may be coupled to a member slidable or rotatable relative to the arm. The grip portion may extend transverse to the lumen of the hub. The grip portion may be configured to receive a palm of a user's hand while a thumb of the user's hand controls sliding or rotation of the member.

The invention provides a microcatheter with a braid layer. The microcatheter comprises a catheter body and a tip part, the tube body is provided with a guide wire inner cavity capable of slidably receiving a guide wire; the tip part is provided with a cavity communicated with the inner cavity of the guide wire; the inner layer forms a guide wire inner cavity, the spring layer is wound around the inner layer in a winding mode and arranged in the length direction of the inner layer, the braid layer is arranged on the outer side of the spring layer and completely surrounds the spring layer, the polymer layer covers the outer side of the braid layer, and the braid layer extends into the tip part. Under the condition, the overlapped part of the tip part and the braid layer can have better bending resistance, so that the microcatheter with the braid layer, which is provided by the invention, is high in pushing property, high in flexibility and excellent in tension resistance and bending resistance, can be provided.

Systems and methods of the invention generally relate to prolonging viability of bodily tissue, especially lung tissue, through the use of an expandable accumulator to maintain a constant pressure within the lumen of the organ even during external pressure fluctuations due to, for example, flight. Systems and methods may include prolonging donor organ viability in storage through the use of an organ container that mimics the geometry and orientation of the organ in vivo.

The present invention relates to medical tubes and methods of manufacture. A medical tube includes an elongated conduit having a first opening, a second opening, a longitudinal axis, a lumen extending along the longitudinal axis between the first opening and the second opening, and a corrugated wall formed of an extruded material extending between the first opening and the second opening and surrounding the lumen. The wall is stiffer in a first length of the conduit adjacent the first opening than in a second length of the conduit adjacent the second opening. The variable stiffness of the tube wall can improve heat distribution of the tube and improve condensate return into a humidifier that provides humidified gas to the tube.

The invention relates to the technical field of medical image processing, and discloses a PCNL fusion image puncture and lithotripsy navigation method and equipment based on optical positioning. The method comprises the following steps: acquiring a real-time ultrasonic image of a target object, and fusing the real-time ultrasonic image with a pre-acquired three-dimensional CT image of the target object to obtain a fused image; establishing a simulated skin-kidney channel according to the fused image; wherein the simulated skin-kidney channel is used for assisting in constructing a lithotripsy path for a target object; acquiring pose information of a navigation marker of the endoscope relative to the target object in real time, and displaying the pose information in the three-dimensional CT image in real time to obtain a target three-dimensional CT image displaying the pose information of the navigation marker of the endoscope in real time; wherein the target three-dimensional CT image is used for assisting in navigating the lithotripsy position of the target object.

This disclosure relates to a medical device for diagnosis or treatment of tissue within a patient, comprising an elongate member having a lumen extending between proximal and distal ends, a coil disposed around the elongate member, and a magnetic core of high-permeability material positioned at least partially within the coil and extending axially beyond at least one of the proximal or distal coil ends. The axial extension of the magnetic core beyond the coil end focuses the magnetic field at a target region to enhance sensing or therapeutic field delivery. The device is suited for endovascular or intraluminal procedures.

The invention provides a pressure adjusting system and a method for adjusting the pressure of fluid in an inner cavity of medical equipment, and relates to a method for controlling a pressure control pump to enable the pressure of the fluid in the inner cavity of the medical equipment to change within a period of time. A coronary artery blood vessel remodeling catheter, a peripheral balloon dilatation catheter, a peripheral blood vessel remodeling catheter, an intracranial laser balloon dilatation catheter, a drug coating balloon dilatation catheter, a photodynamic balloon catheter, a mastoid balloon catheter, a constraint type balloon dilatation catheter and a spinous process balloon can be made. Expansion and contraction of a balloon body in a balloon catheter such as a drug delivery balloon catheter are regularly changed within a period of time, and therefore the treatment effect is better achieved.

Damping devices, including damping devices for automated peritoneal dialysis (APD) systems, and associated systems, devices, and methods are disclosed herein. In one embodiment, a damping device includes a body portion, a first membrane, and a second membrane. The body portion can include a first side, a second side opposite the first side, an inlet, and a cavity fluidly coupled to the inlet. The cavity can be defined at least in part by a lumen in the body portion extending from the first side to the second side. The first membrane can be affixed to the first side of the body portion such that the first membrane hermetically seals the cavity at the first side. The second membrane can be affixed to the second side of the body portion such that the second membrane hermetically seals the cavity at the second side.

Embodiments described herein relate to an implant delivery system for delivering an implant for reducing heart valve regurgitation. The implant delivery system may include an implant catheter disposed in an inner lumen of a guide catheter. The implant catheter may include one or more hypotubes disposed therein, each hypotube configured to receive an elongate member such as a braided tether. A distal end of the implant catheter may be coupled to an implant holder configured to receive the implant. The implant holder may define one or more channels, each channel configured to receive a portion of a respective elongate member. The elongate members configured to couple the implant to the implant holder and transition the implant between configurations. The implant configured to be disposed around a portion of a leaflet of a heart valve to improve coaptation of the heart valve.

Systems and methods for organizing medical tubing and / or wiring are disclosed herein. According to some embodiments, the present technology includes an organizer including a tubular member configured to be removably coupled to an intravenous (IV) pole in a vertical orientation. The tubular member can include a longitudinal axis, a lumen extending along the longitudinal axis, and a longitudinal slit connected to the lumen. The tubular member can be configured to separate at the longitudinal slit to insert and remove the IV pole from the lumen. The organizer can further include a plurality of holders coupled to the tubular member. The plurality of holders can include a first end, a second end opposite the first end, and a curved receiving region between the first and second ends. The curved receiving region can be configured to support tubing or wiring of a medical device coupled to the IV pole.

Described herein are devices and related methods for occluding at least a portion of a body lumen during a surgical procedure. In some embodiments, the device includes an inner shaft defining a lumen therethrough and a first aperture, and an outer shaft including a flexible member and defining a lumen therethrough and a second aperture positioned on the outer shaft proximally relative to the flexible member. The inner shaft extends through the lumen of the outer shaft such that at least a portion of the outer shaft is axially translatable toward and away from a distal portion of the inner shaft. The flexible member is movable between an unexpanded configuration and an expanded configuration when at least a portion of the outer shaft is axially translated toward or away from the distal portion of the inner shaft. In some embodiments, the devices and methods are used for endoscopic surgical procedures.

A medical device for sectioning an intraocular lens comprises a delivery element 220 having a lumen and a distal opening, and a sectioning element 400 configured to be housed within the lumen in a com

A medical system may include a medical device and an insertion portion extending from the handle, the insertion portion having a first lumen and a second lumen, a removable camera sheath, and a needle extending through the first lumen. The removable camera sheath may be configured to removably extend through the second lumen. The removable camera sheath may include a shaft and a connector assembly. The shaft may have a proximal end and a distal end. The distal end may have an imaging device and a lighting element. The connector assembly may be coupled to the proximal end of the shaft. The connector assembly may include a keying feature configured to engage with a receiving feature of the handle.

A probe for insertion into a brain tissue includes a tubular body having an inner lumen and at least two carbon fiber electrode threads (CFETs) extending through the inner lumen of the tubular body. Each CFET includes a carbon fiber having a proximal portion and a distal portion. The proximal portion of the carbon fiber is coated with a polymer. The distal portion of the carbon fiber is exposed to allow direct contact with the brain tissue. The carbon fiber of each CFET has an aspect ratio between 100 and 1500.

Example medical devices are disclosed herein. An example thrombectomy device includes a catheter assembly having an outer shaft having a proximal end region, a distal end region and a lumen, wherein the distal end region includes a first inflow orifice.Further, the catheter assembly includes an inner shaft having a distal end region and a lumen extending within at least a portion of the lumen of the outer shaft, wherein the distal end region of the inner shaft includes a second inflow orifice. Further, the catheter assembly includes a guidewire shaft extending through the lumen of the inner shaft, a tip member coupled to a distal end of the guidewire shaft and a handle configured to shift the catheter assembly such that first inflow orifice, the second inflow orifice, or both the first inflow orifice and the second inflow orifice are in fluid communication with the lumen of the inner shaft.

A system comprises a source of enzymatic detergent and a cleaning device comprising an elongate member configured for advancement through a lumen within a medical device and at least one cleaning member coupled to a portion of the elongate member. The cleaning member comprises distal and proximal end portions and a central portion between the distal and proximal end portions. The central portion is shaped to create a pressure gradient along the central portion from the distal end portion to the proximal end portion. The combination of the enzymatic detergent and the unique nature of the cleaning device is sufficient to remove pre-existing biomatter from the surfaces of the medical device, such as biomatter that has already formed into a biofilm. The detergent loosens the protective layer of polysaccharides and proteins of the biofilm and the cleaning device then removes both the protective layer and the underlying biomatter.

The invention discloses a high-strength self-lubricating three-layer nested medicine-carrying hollow cervical cerclage band with an auxiliary miscarriage prevention function and a preparation method of the cerclage band, and belongs to the technical field of medical instruments. Degradable polyester monofilaments are woven into a hollow round rope, and the hollow round rope and a medical curved needle are integrated; then carrying out polydopamine-polyethylene glycol double-layer modification on a copper-based metal organic framework (Cu-MOF), and loading active molecules; then mixing the drug-loaded Cu-MOF with collagen natural polymer sol, and uniformly filling the gel into the inner cavity of the round rope and forming a three-dimensional bracket through synchronous drawing type micro-perfusion and light-enzyme synergistic cross-linking; then constructing a transient hydrated lubricating layer on the surface; and finally carrying out ethylene oxide final sterilization to obtain a finished product. The cervical cerclage band device provided by the invention simultaneously provides degradable mechanical support, collagen scaffold induction and long-acting slow release regulation, has a low-friction implantation characteristic, and can be well used for preventing or treating middle and late abortion and premature delivery caused by cervical insufficiency.

This invention relates to the field of platinum-iridium ring assembly technology, and in particular to a medical catheter platinum-iridium ring assembly device based on elastic tension. The device includes a worktable and clamps for holding both ends of the catheter body. The outer side of the catheter body is used to fit the platinum-iridium ring. It also includes a back plate, which is located on the back of the worktable. The back plate has a slide rail, which includes a straight rail and a curved rail that are interconnected. A feeding clamp for feeding the platinum-iridium ring is slidably mounted on the slide rail. A tensioning assembly is also included, which is adjustable and movable above the front of the worktable. The tensioning assembly includes a tension clamp and upper and lower positioning clamps. This invention utilizes the elastic rebound of the catheter material to achieve reliable interference fit and locking of the ring. Stable fixation can be achieved with only a small stroke of rolling or crimping, avoiding the problems of ellipticization of the inner lumen and local flattening caused by traditional large deformation crimping.

The application belongs to the field of medical instrument imaging diagnosis equipment quality detection, and particularly relates to a phantom and a method for coronal plane transmission detection of a three-dimensional ultrasonic imaging device. The phantom comprises: an upper panel, an acoustic window, a target group, and an aggregate formed by background ultrasonic tissue simulation material. The upper panel is located above the acoustic window, and the upper panel and the acoustic window form an inner cavity after being connected. The target group and the aggregate formed by the background ultrasonic tissue simulation material are located in the inner cavity. When the coronal plane transmission imaging performance is detected, the phantom is suspended in the imaging area of a hemispherical ultrasonic array, and a degassed water body is also contained in the imaging area. Each target in the target group extends along the vertical direction and is perpendicular to the coronal plane of the breast to be imaged. In this way, the convenience and accuracy of the coronal plane transmission imaging performance detection are improved, and the utility is good.