1950 results about "Inner/Lumen Diameter" patented technology

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.

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 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.

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 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.

Described herein are rigidizing apparatuses (e.g., devices, system, etc.) and methods of using them that may rigidize over a long length of the device from a highly flexible and maneuverable configuration to a highly rigid configuration, while maintaining a relatively small diameter. In particular, described herein are apparatuses and methods including pressure-compression tendons that may be used in conjunction with a second rigidizing layer to enhance stiffness, particularly at the distal end region.

The invention discloses a positioning support convenient to fix and safe to take out in a human blood vessel, and relates to the technical field of surgical operation medical instruments. According to the positioning support, a plurality of positioning thorns with tips are arranged on a metal wire support, and each positioning thorn comprises a metal inner wire and a coating layer; the inner metal wire is connected with a metal wire of the metal wire stent, the diameter of the inner metal wire is smaller than that of the metal wire of the metal wire stent, the coating layer is conical and is made of degradable materials, a preset distance is reserved between the tip end of the inner metal wire and the tip end of the coating layer, and a spiral part is formed in the middle of the inner metal wire; after the coating layer is degraded, the spiral part is changed into a stretching state from a compressed state, the metal inner wire penetrates into the blood vessel wall, and a preset gap is formed between the blood vessel wall surface and the surface of the metal wire stent. The support can be reliably fixed and safely taken out.

An access device for accessing an intervertebral disc having an outer shield comprising an access shield with a larger diameter (˜16-30 mm) that reaches from the skin down to the facet line, with an inner shield having a second smaller diameter (˜5-12 mm) extending past the access shield and reaches down to the disc level. This combines the benefits of the direct visual microsurgical / mini open approaches and the percutaneous, “ultra-MIS” techniques.

The invention provides a thrombus aspiration catheter with the variable inner diameter of the far end, and belongs to the technical field of interventional surgical instruments.The catheter comprises an interventional catheter, an operating handle and a collecting component, and the interventional catheter is used for moving along a blood vessel to be close to the thrombus position; the operating handle is arranged at the near end of the interventional catheter and is used for providing suction force for the interventional catheter; the collecting part is arranged at the far end of the interventional catheter, the near end of the collecting part is communicated with the interventional catheter, and the far end is open and adjustable in diameter; when the interventional catheter moves along the blood vessel to be close to the thrombus, the diameter of the collecting part is in a contracted state and is not larger than that of the interventional catheter, and after the collecting part is in place, the collecting part expands to increase the diameter of the far end so as to integrally suck the thrombus; the thrombus aspiration catheter is mainly used for solving the technical problems that in the prior art, a small-caliber thrombus aspiration catheter is insufficient in aspiration force, repeated aspiration is needed, thrombus escape is easily caused, and a large-caliber catheter is poor in passing ability and difficult to reach a diseased region.

Embodiments of a prosthetic valve delivery apparatus are disclosed. The delivery apparatus includes a first portion configured to maintain a fixed spatial relationship relative to a first end of the prosthetic valve and a second portion configured to maintain a fixed spatial relationship relative to a second end of the prosthetic valve during radial expansion of the prosthetic valve. The first portion includes one or more reference radiopaque markers and the second portion includes an indicator radiopaque marker. A position of the indicator radiopaque marker relative to the one or more reference radiopaque markers measures an axial distance between the first and second ends of the prosthetic valve indicative of a corresponding diameter of the prosthetic valve as it is radially expanded from a radially compressed state to a radially expanded state.

The invention discloses a covered stent and a balloon dilatation covered stent system, and relates to the technical field of medical instruments.The covered stent comprises a stent body connected through a tubular covering film, and the covered stent has a non-load state with the zero compression diameter and a load state which has the compression rate relative to the non-load state and is used for supporting blood vessels to recover blood flow; when the compression ratio of the covered stent is 10%, the numerical range of the radial supporting force of the covered stent is 2.0 N / mm-6. 0N / mm. The balloon dilatation covered stent system comprises an elastic pipe sleeve, a balloon, a mandrel and a covered stent, the covered stent, the elastic pipe sleeve, the balloon and the mandrel are sequentially arranged from outside to inside in a sleeving mode, and the two ends of the balloon are sealed with the mandrel; the near end of the elastic tube sleeve is fixedly connected with the mandrel or the near end of the balloon; and the far end of the elastic tube sleeve movably sleeves the balloon. The covered stent can provide moderate support for blood vessels, and the problems of lumen restenosis and stent collapse after an existing covered stent is implanted can be effectively solved.

The invention relates to the technical field of postoperative nursing devices, in particular to a clinical postoperative nursing drainage device which comprises a shell, a supporting disc is rotationally arranged in the shell, a plurality of arc-shaped plates are elastically and slidably connected to the periphery of the supporting disc in the radial direction, and a drainage tube is arranged in the shell in a penetrating mode and surrounds the arc-shaped plates by a circle to form a reducing ring. When the drainage tube is pulled, the arc-shaped plates on the periphery of the supporting disc can elastically slide in the radial direction, so that the diameter of a reducing ring formed by the drainage tube is reduced, pulling force energy is absorbed, the pulling force borne by a surgical incision is reduced, and the pain of a patient is relieved; when the drainage tube is blocked due to the fact that the inner diameter is reduced due to pulling deformation, hydrops can be dredged through vibration.

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.

An endoluminal prosthesis including a stent-graft formed of a stent and a base graft. The stent-graft is expandable in a radial direction of the endoluminal prosthesis and exhibits a self-expansion force in the radial direction such that the stent-graft is self-expanding in the radial direction from a compacted condition to a self-expanded condition. The endoluminal prosthesis further includes a radially restraining sleeve member having first and second ends and a middle portion, where each of the first and second ends are fixedly coupled to the stent-graft through a heat application process. The radially restraining sleeve member is adjustable to an adjusted diameter in the radial direction in a range of diameters between the self-expanded condition of the stent-graft and the maximum expanded condition of the stent graft through the application of an external force.

The utility model discloses a bone fracture splint fixing device, and particularly relates to the technical field of medical instruments, the bone fracture splint fixing device comprises a plurality of splint components, the splint components are connected into a ring, each splint component comprises a first splint and a second splint, and a plurality of connecting bands are fixedly connected between the first splint and the second splint. A clamping groove is formed in the first clamping plate, two inserting grooves are formed in the clamping groove, a connecting block is fixedly connected to the side, facing the first clamping plate, of the second clamping plate, and the connecting block is movably inserted into the adjacent inserting grooves. Two fastening belts surround the outer portion of the ring formed by the multiple clamping plate assemblies, the outer portions of the fastening belts are fixedly connected with hook-and-loop fastener loop strips, and the inner sides of the fastening belts are fixedly connected with two hook-and-loop fastener hook face pieces. By adjusting the number of the clamping plate assemblies, the diameter of the formed circular ring can be flexibly adjusted, and therefore personalized adaptation can be carried out according to the body type and the injured part of a wounded person.

A method for evaluating plaque load based on OCT images is characterized in that fitting is carried out through the far end and the near end of a blood vessel lumen of the OCT images, a reference lumen at a plaque is fitted out, and then a middle membrane area and a plaque area can be calculated, so that the plaque load condition is evaluated; the imaging length of the intravascular OCT is usually 50-80 mm, the intravascular OCT generally comprises a far end, a lesion part and a near end, and the image of the near end is close to a coronary artery opening and has a larger diameter; the distal end is far away from the coronary opening, the diameter is relatively small, and the diameter of the healthy blood vessel from the proximal end to the distal end generally decreases linearly; when a blood vessel has plaque, the space-occupying effect causes the diameter of the lumen of the blood vessel at the plaque to become smaller. The invention can acquire the real plaque load through the conventional OCT image, provides basis for diagnosis and is beneficial to expanding the scope and quality of OCT diagnosis.

A cleat includes a base member with a base plate and two base member lugs. Each lug has a first inner diameter proximal to the base plate and a second, larger inner diameter distal from the base plate and each lug is threaded. A securing member has a top portion that connects two legs.Each leg is held within a lug by a screw and washer, the washer has a diameter that is greater than the first diameter and less than the second diameter. A spring within each lug urges the leg towards an extended position. A spring-loaded locking mechanism interfaced between the base plate and the top portion holds the top portion of the securing mechanism in a retracted position until an actuator of the spring-loaded latching mechanism is pressed, at which time, the top portion of the securing mechanism is released and moved into the extended position.

The invention relates to a heart valve regurgitation drum and optional closure disk and / or tubular stent to manage and provide levels of intentional regurgitation within an orthogonally delivered transcatheter prosthetic heart valve having a first inner flow control component / valve, a second inner regurgitation control component, and an outer annular support frame having compressible wire cells that facilitate folding flat along the z-axis and compressing the valve vertically along the y-axis, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the tricuspid valve from the inferior vena cava or superior vena cava, or trans-atrially 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 delivery and deployment from a catheter at an acute angle of approach.

This application relates to prosthetic heart valves. Disclosed are embodiments of a radially collapsible and expandable prosthetic heart valve. The valve frame can have a tapered profile when mounted on a delivery shaft, with a smaller diameter at the inflow end portion than at the outflow end portion. The valve can include generally V-shaped leaflets, reducing the amount of material in the inflow end of the frame. An outer skirt can be secured to the outside of the inflow end portion of the frame, with longitudinal slack when the valve is expanded and lying flat against the frame when the valve is collapsed. An angularly woven inner skirt can be axially elongated with the frame. Side tabs adjacent the leaflets can extend through and be secured to window frame portions of the frame to form commissures. The window frame portions can be recessed radially inward relative to the surrounding frame portions when the valve is crimped on a delivery shaft.

The present disclosure relates to prosthetic valves that can be expanded to selected maximal diameters. In an example, a prosthetic valve assembly comprises a prosthetic valve having an annular frame, one or more expansion control rods disposed radially outward to the frame, and one or more flexible tension members extending circumferentially around the frame, and comprising one or more local loops wrapped around the corresponding expansion control rods. The flexible tension member is configured to radially expand to a first diameter when all local loops are wrapped around the corresponding expansion control rods, and expand to a second diameter greater than the first diameter, when one of the expansion control rod is retracted from the flexible tension member, thereby allowing the corresponding local loop to unravel.

The invention relates to a valve used in medical procedures. More specifically the invention relates to an introducer sheath valve used in minimally invasive and conventional surgical procedures. The valve may accommodate a wide range of surgical implement diameters, shapes, and multiple implements without imposing the high frictional forces of known valves.