2569 results about "Inner/Lumen Diameter" patented technology

Disclosed herein are fluid control devices for clot treatment systems, and associated systems and methods. In some embodiments, a fluid control device can be coupled between a catheter and a pressure source and configured to selectively allow or prevent a vacuum generated within the pressure source to be applied to a lumen of the catheter. The catheter and the fluid control device can together define a lumen or fluid path to the pressure source. The lumen or fluid path can have an at least generally uniform dimension (e.g., diameter) along its length, which is expected to inhibit or even prevent choke points or other resistances to fluid flow through the fluid control device, including when used with large bore catheters.

An interventional device for a tubular body, comprising: a stent switchable between a first state and a second state, the diameter of the stent in the second state being greater than the diameter of the stent in the first state; the at least one puncture part is arranged on the stent, and the puncture part is used for puncturing the wall of the tubular body when the stent is in the second state; the at least one electrode is arranged on the at least one puncture part, and the electrode is used for extending out of the tubular body from the area, punctured by the puncture part, of the wall. By means of the scheme, effective implantation of the electrode can be achieved based on the intervention device, the implanted electrode can make direct contact with the biological tissue target area outside the tubular body, direct and non-barrier signal interaction is achieved, and the signal collecting and stimulation applying effects of the electrode are greatly improved.

Systems and methods for providing assistance to a surgeon during an implant surgery are disclosed. A method includes defining areas of interest in diagnostic data of a patient and defining a screw bone type based on the surgeon's input. Post defining the areas of interest, salient points are determined for the areas of interest. Successively, an XZ angle, an XY angle, and a position entry point for a screw are determined based on the salient points of the areas of interest. Successively, a maximum screw diameter and a length of the screw are determined based on the salient points. Thereafter, the screw is identified and suggested to the surgeon for usage during the implant surgery.

Systems and methods for native heart valve repair includes an anchor. The anchor includes an anchor body configured to transition from a first configuration, in which the anchor body is straightened for transvascular delivery to the native heart valve, to a second configuration comprising at least two turns for implanting at the native heart valve. Two or more of the at least two turns in the second configuration have a diameter smaller than a major axis of the native heart valve.

A medical stent includes an expandable structure that is moveable between a collapsed configuration for delivery and an expanded configuration for deployment, the expandable structure in the expanded configuration defining a relaxed diameter. The expandable structure retains its relaxed diameter along portions of the expandable structure that are not constrained by contact with vessel walls after deployment. Portions of the expandable structure that are compressed by contact with vessel walls after deployment are caused to move to a reduced diameter less than the relaxed diameter along portions. The compressed portions of the expandable structure may help prevent plaque from breaking loose. Uncompressed portions of the expandable structure may allow blood flow therethrough.

A suture assembly comprises a suture anchor, a repair suture, and a shuttle suture. Each suture has a looped end and a tail end. The tail end of the repair suture and the looped end of the shuttle suture extend out one side of the proximal end of the anchor, while the looped end of the repair suture and the tail end of the shuttle suture extend out the opposite side of the anchor. The tail of the repair suture may have a proximal portion which is thicker than its end portion. The suture anchor may include a proximal bore receiving the repair suture and a distal bore receiving the shuttle suture. The distal bore may have a rear opening having a diameter approximately equal to the diameter of the proximal portion of the suture and a front opening that is larger than the rear opening.

A separable sheath for an implantable medical device may include a shell having an outer diameter and an inner diameter. A lumen may be defined by an inner diameter and extend from a proximal end to a distal end of the shell. The electrode may be located at a distal end of the sheath. A signal line may be disposed within the housing and electrically coupled to the electrode. The guide rail may be configured to shield the signal line from a cutting path of the sheath separator. In some examples, the sheath may also include a second rail. For example, the signal line may be located between the first rail and the second rail along the length of the sheath. The cutting path may be located between the first rail and the second rail on a side of the sheath radially opposite the signal line.

The invention discloses a catheter with a state-changeable end and a using method, and relates to the technical field of interventional medical instruments. And a deformable body and an adjusting assembly. The diameter of the deformable body is adjusted through the adjusting assembly, so that the diameter of at least part of the deformable body is gradually reduced from the near-end direction to the far-end direction, in the advancing process of the catheter, the deformable body is kept to be small in size, blood vessel wall damage caused by the windowsill effect is prevented, and operation of an operator is convenient and fast; the intervention difficulty is reduced; after the deformable body is in place, the diameter of at least part of the deformable body can be gradually increased from the near-end direction to the far-end direction through the adjusting assembly, the larger suction area is obtained in the suction process due to the increase of the size of the deformable body, the suction efficiency and the thrombus removing effect are improved, the operation time is shortened, and the operation risk is reduced.

A blood collection device to reduce hemolysis in a peripheral intravenous catheter system may include a distal end. The distal end of the blood collection device may include a male luer adapter, which may include a distal opening. The blood collection device may include a cannula in fluid communication with the male luer adapter. The cannula may include a distal end and a sharp proximal tip. The blood collection device may include an elongated neck disposed between the male luer adapter and the sharp proximal tip. The blood collection device may include a fluid pathway extending from the distal opening through the sharp proximal tip. A diameter of the fluid pathway may be constant. An entire length of the fluid pathway is represented by L, and the diameter of the fluid pathway is represented by D. D4 / L may be equal to or less than a predetermined value.

A prosthetic valve includes a frame with inflow and outflow ends and a longitudinal axis extending therebetween. The frame is in a radially expanded state defining a radially expanded diameter and is configured to define a partially radially compressed diameter when the frame is in a partially radially compressed state. A sealing skirt coupled to the frame includes inflow and outflow end portions, an inelastic skirt portion with weft and warp threads, and a tensioning element extending circumferentially along the outflow end portion. The sealing skirt includes a terminal outflow edge configured to define a skirt diameter greater or equal to the partially radially compressed diameter and less than the radially expanded diameter when the sealing skirt is in a relaxed state. The weft and warp threads are configured to be oriented at an approximately 45-degree angle to the longitudinal axis when the sealing skirt is in the relaxed state.

The present disclosure provides systems and methods for a replacement mitral valve. The replacement valve may be made of a less rigid material thereby allowing the packed diameter of the replacement valve to be decreased. The less rigid replacement mitral valve may include a ventricular portion and a central portion. The ventricular portion may include a guide channel. A wire may be advanced into the guide channel. The wire in the guide channel may increase the stiffness on the ventricular side of the replacement valve. The increased stiffness may prevent the replacement valve from collapsing through a native valve annulus.

Various implementations include an inflatable sheath (8) for delivering a medical device, the sheath includes a fluid chamber (for example, a fluid-bearing chamber) (356) that when inflated expands the sheath from an unexpanded configuration in which the central lumen has a first diameter to an expanded configuration in which the central lumen has a second, larger, diameter.

The invention discloses an integrated interventional venous valve and a preparation method thereof. The integrated interventional venous valve comprises a valve stent, a valve leaflet and a skirt; the valve stent comprises a first annular grid stent, a second annular grid stent and a straight rod for connecting the first annular grid stent and the second annular grid stent; the skirt edge covers the inner and outer surfaces of the first annular grid bracket and the second annular grid bracket; the valve leaflet is arranged on the straight rod, one side of the valve leaflet is connected with the skirt edge, and the free surface of the other side of the valve leaflet is arc-shaped; according to the integrated interventional venous valve, the valve leaflet and the skirt edge cover the inner surface and the outer surface of the valve support, so that the valve support, the valve leaflet and the skirt edge do not need to be fixed through sewing, the problems of complexity and potential tearing risk of split type processing are solved, and by arranging the material and the structure of the valve support, the integral interventional venous valve can be manufactured. And the valve leaflet free surface has a bionic arc shape, so that the integrated interventional vein valve can adapt to the diameter change of a blood vessel.

A method of treating a recurring airway stricture or stenosis in a body lumen includes inserting a scope and a drug-coated balloon catheter into a target site comprising the recurring airway stricture or stenosis in the body lumen. The method includes inflating the balloon to an inflation diameter such that the coating contacts an interior of the body lumen at the target site. The method includes deflating the balloon and withdrawing the scope and the balloon catheter from the target site.

The invention discloses a balloon catheter for releasing medicine in a human body cavity. The balloon catheter comprises an outer balloon and an inner balloon located in the outer balloon. The diameter of two ends of the outer balloon is larger than that of the middle; a plurality of rows of semi-through holes are formed in the outer balloon, each row of inner semi-through holes are formed in the longitudinal direction of the outer balloon, and a cutting mark is arranged between every two adjacent semi-through holes in each row; and the inner balloon is a three-stage expansion balloon. The double-layer balloon structure is adopted, in the process that the internal pressure of the inner balloon is gradually increased to push the outer balloon to be gradually expanded, two treatment means of medicine spraying and dilation are executed at the same time, and therefore the treatment effectiveness is improved; the use efficiency of the medicine can be ensured while the medicine can accurately act on the focus; compared with an existing treatment means, the application is wider in application range and non-invasive in treatment, foreign matter does not need to be implanted, an instrument does not need to enter a human body cavity for multiple times, and discomfort of a patient during treatment can be greatly reduced.

The invention relates to the technical field of metal spring production, and discloses an integrated forming mechanism for millimeter-level spring production, which comprises a feeding component, the feeding component comprises feeding wheels which are vertically and adjacently arranged, each feeding wheel comprises a male body and a female body, the male body and the female body have taper, and the male body and the female body are provided with taper; the small end face of the male body and the small end face of the female body are arranged adjacently, and the male body and the female body are arranged in a sliding connection and embedded mode, so that an annular groove is formed in the side face of the feeding wheel. The size of the groove is dynamically adjusted by controlling the connection degree between the male body and the female body, and high-precision clamping and stable feeding of wires with different diameters are achieved; the groove formed when the male body and the female body slide relatively is utilized, the width and the depth of the groove can be accurately changed according to actual requirements, and the optimal clamping force is ensured.

The invention discloses a sacroiliac joint fixing device, and relates to the technical field of surgical instruments, the sacroiliac joint fixing device comprises an outer nail, an inner nail and a connector, threads are arranged on the peripheral wall of the outer nail, a containing hole is formed in the outer nail, a bolt head is arranged at the rear end of the outer nail, a plurality of open grooves are formed in the peripheral wall of the outer nail, the open grooves are communicated with the containing hole, and a porous structure is formed on the peripheral wall of the outer nail; the inner nail is arranged in the containing hole in a penetrating mode, the diameter of the inner nail is smaller than that of the containing hole, and the connector is detachably connected to the bolt head. The sacroiliac joint can be effectively fixed for a long time.

The invention relates to an anchor hook and methods of using the same for subannular anchoring of a transcatheter heart valve replacement, and in particular for an orthogonally delivered (side-delivered) transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the mitral or tricuspid valve from the inferior vena cava or superior vena cava, or trans-septally to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring a delivery catheter to bend 90 degrees during deployment.

A catheter comprises a catheter shaft having a fluid channel, an ultrasound transducer and a compliant balloon mounted on the catheter shaft and having an interior in fluid communication with the fluid channel and containing the ultrasound transducer. The compliant balloon includes a balloon wall having a working section radially surrounding the ultrasound transducer. The working section has a predetermined straightness when the working section has a first diameter and when the working section has a second diameter that is at least 2 mm greater than the first diameter. Other embodiments are also described and claimed.

The hose joint includes: a nipple having conductivity and provided along an insertion space of the hose body; a sleeve deformable in a radial direction and provided so as to surround an outer circumference of the insertion space of the hose body formed along an outer peripheral surface of the nipple; a plurality of separated holders provided outside of the sleeve to cover an outer face of the sleeve in a circumferential direction and be separable in the radial direction; and a tightening member provided to extend across the plurality of separated holders so as to move the individual separated holders closer together in the radial direction and cause diameter reduction of the sleeve. The nipple having the conductivity has a grounding clip having conductivity, the grounding clip is locked to an outer circumference of the nipple, each of the separated holders having a holder extension part.

A delivery apparatus including a measurement device to monitor the real-time diameter of a prosthetic heart valve can include a handle, at least one first actuator extending from the handle and being configured to apply a distally directed force to a proximal end portion of a prosthetic heart valve, at least one second actuator extending from the handle and being configured to apply a proximally directed force to a distal end portion of a prosthetic heart valve, a sensor, and first and second motion-transmitting members coupled to the first and second actuators, respectively, and having proximal ends coupled to the sensor, wherein the sensor senses relative movement between the motion-transmitting members upon actuation of the first and second actuators to determine the diameter of the prosthetic heart valve as it expands from a radially compressed configuration to a radially expanded configuration.

Disclosed is a granule made of biocompatible metallic material, in particular made of titanium or titanium alloys, for vertebroplasty operations. The granule has a spherical shape and includes a central core with a solid structure, also spherical, having an outer surface from which a first diametrical rib and a second diametrical rib also having a solid structure, protrude. The ribs are advantageously arranged according to two diameters orthogonal to each other. The granule also includes a portion having a trabeculated structure which extends between the outer surface of the central core and the outer surface of the granule itself.

Disclosed herein is a catheter, which in some embodiments includes a distal section configured to enter a skin insertion site. The distal section can include a tapered junction having one or more dilation structures configured to dilate the skin insertion site. The distal section can further include a distal portion extending from a distal end of the tapered junction, the distal portion having a diameter smaller than a proximal portion of the catheter. In combination, the tapered junction, the one or more dilation structures, and the specific actions of the user urging the catheter into the insertion site can result in an improved fit of the catheter in the insertion site.

The invention relates to the technical field of medical interventions, and discloses a difficult-to-layer composite woven balloon and a preparation method thereof, the difficult-to-layer composite woven balloon comprises an inner balloon and a fiber line structure woven on the outer surface of the inner balloon; the fiber thread structure is divided into warp threads and weft threads, the fiber threads extending in the diameter direction of the balloon are the warp threads, and the fiber threads extending in the axial direction of the balloon are the weft threads; the inner balloon is sequentially subjected to surface treatment, primer treatment, fiber weaving, surface treatment, surface sizing and surface curing treatment. The preparation process does not need complex special equipment, the material requirement is reasonable, the repeatability is high, the production difficulty and cost are reduced, convenience is provided for large-scale application of the material, and the material has extremely high practical value and popularization potential in medical scenes such as vascular stenosis dilation and calculus dilation pathway establishment.

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.

The invention provides a degradable combined type tracheal stent and an implantation method, the degradable combined type tracheal stent comprises a plurality of rib plates which are coaxially arranged and are in an annular shape and soft bodies which are connected between every two rib plates and are in a net shape, and axial length adjustability and axial bending deformation of a stent main body are achieved through the soft bodies; the support further comprises a connecting part, the connecting part comprises a first connecting body arranged at the two axial ends of the support body and a second connecting body matched with the first connecting body, and the first connecting body and the second connecting body are matched to achieve axial detachable connection and combination between every two support bodies. The adjustable axial length of the stent main body, bionic axial bending deformation and stable connection and combination between every two stent main bodies are effectively realized. The invention further provides an implantation method of the degradable combined type tracheal stent, the implantation method comprises the steps of obtaining the size of the diseased trachea, determining the diameter and the combination number of the stent body, sleeving the diseased trachea and connecting the combination to complete implantation, and the method is easy to operate and can meet different requirements of clinical complex environments.

The invention belongs to the field of sponge forceps, and discloses a pair of cardiopulmonary transplantation hemostatic sponge forceps, which comprises a clamping part, a hemostatic component and an adjusting component, the annular frames are symmetrically arranged on the clamping surfaces of the two clamp arms; the hemostasis assembly comprises a plurality of pressing cylinders evenly distributed in the circumferential direction of the annular frame, a pull wire linked with the multiple pressing cylinders and hemostasis layers arranged on the outer sides of the pressing cylinders. Wherein the pressing cylinders are arranged to have convergent motion freedom degrees towards the central axis of the annular frame, when the adjusting knob is operated to tighten the traction line, all the pressing cylinders synchronously move inwards in the radial direction to form a dynamic contraction ring structure, the hemostasis layer forms a continuous pressure applying face matched with the outer wall of a blood vessel, and through radial sliding fit of the pressing cylinders which are evenly distributed in the circumferential direction and the annular frame, the continuous pressure applying face is formed. A contraction ring structure with the diameter capable of being dynamically adjusted is formed by combining a synchronous contraction mechanism of a traction line, and the stress uniformity of a suture line is improved by applying multiple circumferential pressures to the vascular suture line, so that local high-pressure points caused by a traditional rigid forceps holder can be weakened.

A gasket 4 includes: a cylindrical body portion 10 having a communication hole 10a for providing communication between flow passage holes 2c, 2c formed in two fluid devices 2, 2, respectively; and an annular primary sealing portion 11 projecting from a radially inner side of an axially outer end portion of the body portion 10 toward an axially outer side and to be press-fitted into an annular primary sealing groove 2d formed in each fluid device 2. In a state before the primary sealing portion 11 is press-fitted into the primary sealing groove 2d, an entirety of an inner circumferential surface 10b of the body portion 10 is formed such that a diameter thereof gradually decreases from both axially outer ends thereof toward an axially inner side.

The invention discloses a special suture line guiding device for cervical surgery, which comprises a suture needle main body, two ends of the suture needle main body are respectively provided with a needle tip end and a needle tail end, the needle tail end is connected with a suture line, the diameter of the suture needle main body is not less than 9mm, the suture needle main body is provided with a threaded hole, and the needle tip end is connected with the suture line. A threaded rod corresponding to the threaded hole is arranged on the needle tip end, a reinforcing coating is coated on the needle tip end, and a plurality of suture needle bodies are arranged on the suture needle body. Through the arrangement of the threaded rod and the threaded hole, the needle tip end and the suture needle body are divided into two parts, the needle tip end can be independently replaced, the needle tip end is coated with an aluminum oxide coating, the strength of the needle tip end is guaranteed, and the outer surface of the needle tip end is smoother; the reinforcing rib is arranged in the open slot, so that the strength of the suture needle main body is ensured, and meanwhile, the situation that the surface of the suture needle bulges due to the use of the reinforcing rib and the suture effect is influenced is avoided.

Disclosed herein are fluid control devices for clot treatment systems, and associated systems and methods. In some embodiments, a fluid control device can be coupled between a catheter and a pressure source and configured to selectively allow or prevent a vacuum generated within the pressure source to be applied to a lumen of the catheter. The catheter and the fluid control device can together define a lumen or fluid path to the pressure source. The lumen or fluid path can have an at least generally uniform dimension (e.g., diameter) along its length, which is expected to inhibit or even prevent choke points or other resistances to fluid flow through the fluid control device, including when used with large bore catheters.