59 results about "Canal wall" patented technology

An embolectomy device includes a catheter and an elongated shaft positioned in and moveable within the catheter. The shaft has proximal and distal end portions, and a retrieval portion between the proximal and distal end portions. The retrieval portion has a plurality of legs having proximal and distal end portions. Portions of the legs are movable laterally outward from a long axis of the elongated shaft when the retrieval portion is at least partially moved out of the catheter. A retrieval net can be fixed to portions of the legs for engaging a clot or other occlusion within a body canal. An expander can be provided for moving portions of an occlusion toward canal walls to open a lumen. A method for removing clots and other occlusions from body canals is also disclosed.

Method and apparatus for disinfecting and / or sterilizing a root canal system by targeting the water content of disease and debris in the canals. The laser technique of employs a frequency of the wavelength emissions between about 930 to about 1065 nanometers with an optimum of 980 nm. This range of wavelengths targets the water content of tissue cells and pathogens as well as any residual organic debris in water within the root canal system after its preparation while being poorly absorbed by the surrounding dentin. The selection of the optimum wavelength produces significant effects generating and advancing treatment to the targeted aqueous environments. This is due to the rapid energy absorption by the water and the subsequent creation of gas bubbles, liberation of heat and subsequent propulsion of waves of heat and gas that impact along the canal walls and ramifications resulting in an enhanced bacterial kill and cleaning of the canal walls and ramifications. No dyes or other additives are necessary to enhance the effectiveness of the laser kill of bacteria, etc.

A device for transferring EGR gasses from the exhaust collector of a supercharged internal combustion engine to its inlet conduit includes, besides a supercharge unit, a venturi device having the purpose of sucking the EGR gasses from the exhaust collector into the inlet conduit in order to overcome the high gas pressure in the pressurized charging air in this conduit. In order to adjust the amount of sucked-in EGR gas to the different load points, under which the engine works, an injector tube is arranged in the inlet section to the canal of the venturi device, through which injector tube the EGR gasses are led into the inlet conduit. The free end of this injector tube delimits, together with the surrounding canal wall, a ring-shaped passage, whose cross-sectional area may be varied by an axial relative motion between the injector tube and the venturi device.

The invention discloses a plant root system monitoring system based on a hyperboloidal mirror, which comprises a micro root canal, a hyperboloidal mirror and a digital camera unit, wherein the micro root canal is arranged in a field where a monitored plant grows, the hyperboloidal mirror is arranged inside the micro root canal, and the digital camera unit is arranged inside the micro root canal and positioned above the hyperboloidal mirror and connected with an image acquisition card. In the invention, a CCD (Charge Coupled Device) camera can obtain a 360-degree horizontal field integral image around the reflector through each acquisition, the camera is only controlled to move up and down along the canal wall of the micro root canal without rotating; and in the post-stage image processing, the image can be vertically spliced only. Therefore, according to the technical scheme, the root system image is acquired by adopting the plant root system monitoring system, the complexity of mechanical design and post-stage image processing is reduced, and the image acquiring efficiency is improved.

The invention discloses a deflectable sheathing canal and a delivery system with the deflectable sheathing canal, wherein the deflectable sheathing canal comprises a canal body; the canal body is provided with a far end and a near end; a reinforcing rib and a traction wire are arranged in the canal wall of the canal body along the axial direction; a far end of the traction wire is fixedly arranged on the far end of the canal body; a near end of the traction wire extends out of the canal body and is used for being connected with an operation handle; the delivery system comprises the deflectable sheathing canal, a sheath core and the operation handle; the sheath core is arranged in the sheathing canal; the operation handle is fixed with the near ends of the deflectable sheathing canal and the sheath core; the near end of the traction wire is fixedly arranged on the operation handle. The deflectable sheathing canal provided by the invention contributes to adjusting the far end direction of the sheathing canal; the controllability of the far end bending direction of the sheathing canal is improved; the movement of the far end of the sheathing canal towards a diseased region can be easily controlled.

A composition and method for inducing bone growth and healing is provided. The composition is useful for promoting new bone synthesis, and to enhance the mechanical stability and longevity of orthopaedic implants. The composition includes a bone endogenous material which is used as raw material for the body's natural osteogenic mechanism to synthesize new bone. The composition has a flow phase and a congealed phase. The composition is applied, in the flow phase, within the reamed medullary canal of a long bone prior to insertion of an endoprosthesis. Following insertion of the endoprosthesis, the composition undergoes a phase change to the congealed phase, for example via cross-linking of the bone endogenous material in the composition, to provide a compliant barrier layer in the intra-medullary gap between the implanted endoprosthesis and the medullary canal wall. The resulting barrier layer has a dual mode porosity system, having a first order porosity to accommodate and promote convective diffusion of nutrient species into and through the barrier layer, and a second order porosity to accommodate osteoblastic migration therein without the need for osteoclastic resorption. Osteoblasts synthesize new bone using the barrier layer itself as raw material, essentially osteoconverting the barrier layer into synthesized new bone. In a preferred embodiment, the second order porosity is provided via a rapidly degrading polymer added to the composition, which has a half-life for degradation of 1-60 days.

A multi-joint endoscope bending mechanism with a force sensing function relates to an endoscope bending mechanism. In an existing medical endoscope, only one section at a head end of the endoscope is provided with bending controllability, the other parts of the endoscope do not have the function, and the surface of the endoscope is not integrated with a pressure sensor so that the contact pressure between a scope body and the intestinal canal wall can not be sensed. In the multi-joint endoscope bending mechanism, a first and a second connecting ear of a universal ring of two adjacent joints are matched and riveted with rivet clearances; a guide through hole of a guide seat on a universal ring of a start end joint of each bending uni-joint section is fixedly connected with a spring tube; four multi-strand steel wires in the bending uni-joint section pass through each spring tube and each guide through hole and are fixedly connected with a rear end circular ring; five bending uni-joint sections are wrapped by steel wire woven nets and rubber covering films from the inside to the outside; and pressure sensors are embedded in the rubber covering films. The multi-joint endoscope bending mechanism has a flexible spatial complexing bending capability and also a full-direction force sensing function. When used for examining an intestine problem of a patient, the multi-joint endoscope bending mechanism can relieve the pain suffered by the patient and is highly safe.

The invention provides a polar polymer and a non-polar polymer and a metallic reinforcement combined canal, the combined canal wall is formed by firm gluing and coating of grafting modified polyolefin polymer continuum with polar group with inner-outer surfaces of apertures on metallic reinforcement frame, a non-polar polyolefin polymer layer is coated on inner or outer layer of the canal wall. The invention solves technical problem of hard integral gluing of metallic and polyethylene combination interface, and reduces the cost and has a appreciable economic benefit, which provides reliable and convenient connections.

A totally implantable hearing system having a sound processing device, a coil assembly, and a magnet assembly. The magnet assembly is implanted in the middle ear of a user and is in contact with at least a portion of an ossicle of the middle ear. The sound processing device receives and converts sound into an electrical signal. The coil assembly receives and converts the electrical signal from the sound processing device into an electromagnetic signal, and transmits the electromagnetic signal into the middle ear of the user such that the electromagnet signals interact with the magnet assembly, thereby causing the magnet assembly and the ossicle to vibrate thereby creating the perception of sound in the user. The coil assembly is preferably implanted within the bony canal wall adjacent the outer ear canal of the user such that at least a portion of the coil assembly extends into the middle ear space of the user. The system preferably has a spacer connected to the magnet assembly and / or the coil assembly to substantially maintain a spatial separation between the magnet assembly and the coil assembly, while allowing for the magnet assembly to vibrate the ossicle in response to the electromagnetic signal transmitted by the coil assembly.

An endodontic post comprising a combined endodontic post and filling material tip in a single unit. To use the post unit, the device is placed in an oven or heater to heat and soften the thermoplastic material. The device will then be placed in a root canal that has been opened to a predetermined dimension by use of endodontic files, to seal the apical end. If necessary, the gutta percha can be compacted toward the apex, while it is still in the softened state, to ensure the apex is adequately sealed. The post is then cemented into place by lining the canal walls with a bonding agent and filling the interface between the post and the walls of the canal with a dual cure resin cement. This will result in a coronal seal of the canal via resin restorative material and an apical seal of the canal by means of gutta percha and sealant. The remaining portion of the post, extending supra-gingivally, will be used to build a core around it. Any excess will be cut off. One length of the device will be longer to accommodate the longer roots in anterior teeth. Another length will be shorter to accommodate smaller roots in the molar region.

A glass ionomer or resin modified glass ionomer coated blank is combined with glass ionomer or resin modified glass ionomer to create an integral mono-block post. prefabricated glass ionomer or resin modified glass ionomer post (with or without a coated blank) is cemented into the root canal with glass ionomer or resin modified glass ionomer, thereby creating a mono-block post as well as a mono-block core. The glass ionomer or resin modified glass ionomer cement is bonded to the canal wall and also through the bonding of the cement to the post surface of similar material. An alternate methodology involves syringing glass ionomer or resin modified glass ionomer in a malleable, semi-solid state into the post preparation space and a glass ionomer or resin modified glass ionomer coated blank is then inserted into the canal to a distance substantially equal to the depth of the post preparation.

The invention belongs to the field of endoscopes and discloses an extracorporeal magnetic control type intelligent electrical stimulation capsule system based on video image navigation. According to the system, multiple stimulating electrodes are arranged on the outer surface of a shell and connected with an electrical stimulation generator, a main control system is connected with an image sensor, a pressure sensor and the electrical stimulation generator, an intracorporal wireless communication module is connected with the main control system and an extracorporeal electrical stimulation control device, receives electrical stimulation signals of the extracorporeal electrical stimulation control device and transmits the signals to the main control system, the main control system sends an electrical stimulation control command to the electrical stimulation generator according to the electrical stimulation signals, the electrical stimulation generator generates stimulation currents and transmits the stimulation currents to each stimulating electrode, and each stimulating electrode releases the stimulation currents to achieve electric stimulation of alimentary canal wall muscles.

The invention discloses a catheter, comprising a head, a tail, a medicine injection pipe, a water injection pipe and a water bag, wherein a urination port and a medicine outlet are formed in the head; a medicine injection port, a urine outlet and a water injection port are formed in the tail. The catheter is characterized in that a urination channel which is communicated with the urination port and the urine outlet is formed among the medicine injection pipe and the water injection pipe and the urethral canal wall of a human body; a urine collection end is arranged on one end close to the tail, and is fixed on the tail through a flexible hose; the water injection port is communicated with the inner cavity of the water bag through the water injection pipe. According to the catheter, the flushing effect on the urethral canal is realized when a patient urinates, pathogenic microorganisms are prevented from producing retrograde infection at the external urethral orifice, the occurrence of inflammation is avoided, the service life of the catheter is prolonged, the cross section area of the catheter is greatly reduced, the irritation to the urethral canal is small, and the discomfort of the patient is alleviated. The catheter has the advantages that the structure is novel, the beneficial effect is obvious, and the application and popularization are facilitated.

The invention discloses an anti-breakage sheathing canal. The anti-breakage sheathing canal comprises a canal body and an expansion section used for accommodating an implanted instrument, wherein one side of the far end of the canal body is butted with the expansion section, at least two reinforcing ribs are axially arranged in the canal wall of the expansion section, and the expansion section extends out from the near ends of the reinforcing ribs and is fixedly connected into the canal wall of the canal body; the material of the reinforcing ribs is Kevlar fibres; the diameters of the reinforcing ribs are 0.03-0.12mm; the quantity of the reinforcing ribs is 2-4. According to the anti-breakage sheathing canal disclosed by the invention, the strength of the expansion section is improved while the overall compliance of the sheathing canal is kept, thus pulling breakage for the sheathing canal while the implanted instrument is released can be avoided.

The invention provides a metallic polypropylene combined canal, characterized in that the canal wall of which is provided with tubular metal frame having apertures as reinforcement bodies, the grafting modified polypropylene continuum with polar group is firmly glued and coated on the frame surfaces through apertures of the tubular metallic frame on surfaces of the frame, grafting ratio of the grafting modified polypropylene is 0.12 percent to 1.5 percent. The invention solves technical problem of hard firm integral gluing of metallic and polypropylene combination.

The present invention discloses an adjustable bent sheathing canal. The adjustable bent sheathing canal comprises a shell body, a canal body, traction wires and a bending adjusting device; the shell body is provided with an inner cavity; the canal body is provided with a near end and a far end, the near end of the canal body is arranged in the inner cavity in a penetrating mode, the far end of thecanal body extends out of the inner cavity, and a canal wall of the canal body is provided with at least one guide wire cavity; the traction wires are movably arranged in the wire guide cavities, oneends of the traction wires are connected with the far end of the canal body, and the other ends of the traction wires are connected with an inner wall of the shell body; and the bending adjusting device is arranged in the inner cavity and can pull the traction wires to bend the far end of the canal body. By means of the arrangement, the traction wires are pulled through the bending adjusting device, the far end of the canal body is bent under a pulling force of the traction wires, and thus the far end of the canal body can reach a needed position.

A movable forming machine for the U-shaped canal wall is composed of machine frame, motor with speed reducer, left and right winders, lower die with U-shaped moulding cavity, upper die with punch die plate, lifting pulleys for lower die, steel cables for said pulley and winder, and two vibrators respectively for upper and lower dies.

The invention relates to a stretching Yang modulus meter zero-friction active platform that is formed by optical level shoe plate, active platform and batten. The active platform is set on the optical level shoe plate, and the active clip head is set in the axial canal. The diameter of axial canal is 10-15mm larger that the outer diameter of the active clipping head, and only 1-2mm larger than the active clipping head. The batten is set on the active platform, and is connected to optical level shoe plate by two nuts. Adjusting the base nut of the adjusting instrument to make the clipping head discontact to optical level shoe plate axial canal wall, and adjusting the active platform and the clipping head, and fixing the active platform on the optical level shoe plate by the two nuts, the active clipping head would not have friction and it is easy to operate.

Described are medical products, systems, and methods useful for treating fistulae, particularly enterocutaneous fistulae. Certain inventive products are configured to have portions residing in and around a primary fistula opening in a wall of the alimentary canal. One product includes a graft body which is configured to block at least the primary opening. The graft body includes a capping member connected to an elongate plug member. The capping member is configured to contact portions of the alimentary canal wall adjacent to the primary opening, with the elongate plug member extending into at least a portion of the fistula. A product of this sort may be particularly adapted to allow a portion of the capping member to be positioned alongside an exterior, lateral surface of the plug member, e.g., when placed in a delivery device lumen. Such a capping member may be hingedly or non-hingedly coupled to the elongate plug member.

The invention relates to a method for estimating shear stress of a rectangular canal wall surface and a bed surface. The method comprises the following steps: calculating the average shear stress of the bed surface; calculating the average shear stress of the wall surface; and calculating the ratio of a dragging force on the two side walls to a bed surface dragging force. According to the method disclosed by the invention, the average shear stress of the side wall and the bed surface is calculated by utilizing the section size, the hydraulic gradient and the width-depth ratio correction coefficient of the smooth rectangular canal, and the drag force of the water flow acting on the wall surface and the bed surface under the constant uniform flow condition can be accurately calculated. According to the method, the calculation precision of the average shear stress of the wall surface is improved to be within 7.5%, and the calculation precision is greatly improved. Compared with a traditional bed surface shear stress calculation method, the method has the advantages that the side wall effect is comprehensively considered, and the canal resistance coefficient and the riverbed erosion and deposition change can be analyzed more accurately. The method is convenient and simple, can be suitable for canals with different width-depth ratios, unifies wall surface shear stress calculation ofthe wide and shallow canals and the narrow and deep canals, and is wider in application range.

The invention relates to an ecological cultivation system for a sand leaching slope water filtering pond. The system comprises a pond body, a sand leaching slope filtering structure, a water circulation pipeline, a ladder, an artificial road and an ecological ditch, wherein the pond body is provided with a pond bottom face and a pond slope face located on the peripheral side of the pond bottom face, the ladder is led from the pond bottom face to the top end of the pond slope face, the artificial road is located at the upper end of the pond edge slope face, the ecological canal is located on the outer side of the artificial road, and submerged plants and shellfish are arranged at the bottom of the canal; the sand leaching slope filtering structure is arranged at the upper portion of the partial pond slope face; the bottom of the pond body is communicated with the ecological canal through the water circulation pipeline; a controllable water level overflowing structure is arranged at the position, corresponding to the sand leaching filtering structure, of the canal wall of the ecological canal, and the water outlet end of the controllable water level overflowing structure is located above the sand leaching slope filtering structure. The system is suitable for high-density high-yield intensive culture of various feeding fish, culture of high-quality fish with the high oxygen consumption rate, cooperative culture of high-quality carnivorous fish, and culture of various special aquatic livestock, increases the yield of aquatic products, and improves the quality of aquatic products.

The invention discloses a device and method for detecting biomechanical properties of aortic dissection lesion blood vessels. The biomechanical property of the diseased blood vessel is detected by using the detection device with two tension handles; when the biomechanical properties of the aortic dissection lesion blood vessels are detected, the bilateral tensile strain, the corresponding stress and the cutting stress of the penetrating suture on the lesion blood vessel wall material due to traction are tested. Through the testing of the bilateral tensile strain, the corresponding stress and the cutting stress generated by the penetrating suture on the vascular wall material of the lesion due to traction for the lesion blood vessel wall, the device achieved the detecting and recording of the biomechanical properties of walls of the aortic dissection lesion blood vessels and provides accurate and effective guidance data for doctors; therefore, the accurate implementation parameters areprovided for the operation process of the aortic canal wall with the dissection lesion, and the operation risk is greatly reduced.

The invention provides a metallic polyethylene combined canal, the canal wall of which is provided with tubular metal frame having apertures as reinforcement bodies, the grafting modified polyolefin polymer continuum with polar group is firmly glued and coated on the frame surfaces through apertures on the tubular metallic frame on inner-outer surfaces of the frame, grafting ratio of the grafting modified polyolefin is 0.12 percent to 1.5 percent. The invention solves technical problem of hard firm integral gluing of metallic and polyethylene combination interface.

The invention discloses a humidification bottle and an oxygen inhalation apparatus having the humidification bottle. An oxygen intake canal and a movable gliding mass are arranged at the bottle jack of the humidification bottle, with the oxygen intake canal at least including an upper canal of large diameter in sealing connection with the bottle jack and a down canal of small diameter extending inside the humidification bottle; the outer wall of the lower portion of the movable gliding mass is in sealing cooperation with the inner wall of the upper canal; a plurality of air holes are arranged in the wall of the upper canal, with the air holes being blocked by the movable gliding mass under natural conditions and being exposed when the movable sliding body is downward pushed by an external force; an air induction channel, arranged at the center of the movable gliding body, is provided with a sealing apparatus inside which opens the air induction channel when the movable gliding mass is downward pushed by an external force and blocks the air induction channel under natural conditions; and an air-venting channel of the humidification bottle is connected with one or more air holes in the upper canal wall. When in use, the sealing apparatus of the humidification bottle is automatically opened and accordingly the humidified oxygen enters the oxygen tube for outputting via the air holes in the oxygen intake canal. When not in use, the humidification bottle automatically keeps sealed state.

The invention discloses a jejunum nutrient canal with a water bag. The jejunum nutrient canal comprises a main canal, the tail of the main canal is provided with a canal cap, the side of the main canal is provided with a water tube along the canal wall, the top end of the water tube is provided with a water filling connector, and the bottom end of the water tube is provided with a water filling ball bag which is arranged on the outer wall of the main canal head in a covering mode. A patient adopts a lateral position, water is filled into the water filling ball bag through the water filling connector after the main canal enters the stomach, the water filling ball bag falls to the direction of the pylorus due to the action of the gravity after being filled with the water, the main canal head is brought into the pylorus along with the peristalsis of the stomach, then the jejunum nutrient canal enters the intestinal tract, and the operation efficiency is greatly improved; in addition, the position of the water filling ball bag filled with the water can be easily judged, then the position of the main canal head can be known, and simpleness and convenience are achieved.

The present invention relates to tunnel construction technology, and is especially reinforcing bar cage hoisting process for canal wall construction. The reinforcing bar cage hoisting process has longitudinal truss, transverse truss and reinforcing bar cage connected detachably. The present invention can ensure the hoisting rigidity of the reinforcing bar cage while realizing the repeated use of the trusses.

The invention provides an endoscope micro-capsule robot. The robot comprises a head part, a neck part, a body part and a tail part. The body part is a column, a spiral groove is formed in the outer surface of the body part, two ends of the body part are rotatably connected with the neck part and the tail part respectively, and the neck part is connected with the head part; a motor which drives thebody part to revolve on its axis is arranged on the tail part, the motor is connected with the body part, a sealed cavity is defined among the head part, the neck part, the body part and the tail part, and the motor is arranged in the sealed cavity. The endoscope micro-capsule robot has the advantages that direct contact between the endoscope micro-capsule robot and the intestinal canal wall is avoided, the aim of non-destructive driving is achieved, the endoscope micro-capsule robot can be controlled to move forward or retreat by controlling front and reverse rotation of the motor, and repeated and detailed observation of a special point in the human organ can be achieved.

The invention provides a polar polymer and a non-polar polymer and a metallic reinforcement combined canal, the combined canal wall is formed by firm gluing and coating of grafting modified polyolefin polymer continuum with polar group with inner-outer surfaces of apertures on metallic reinforcement frame, a non-polar polyolefin polymer layer is coated on inner or outer layer of the canal wall. The invention solves technical problem of hard integral gluing of metallic and polyethylene combination interface, and reduces the cost and has a appreciable economic benefit, which provides reliable and convenient connections.

The invention discloses a building block for a water conveyance canal. The building block comprises a block body laid on each canal wall at both sides of the water conveyance canal; one side, which is towards the canal wall, of the block body is provided with a soil retaining body; one side, which is towards water, of the block body is provided with a waterward body; a connecting body extending along the height direction of the block body is arranged between the soil retaining body and the waterward body; the upper lateral surface of the connecting body is respectively lower than those of the soil retaining body and the waterward body; the lower lateralsurface of the connecting body respectively extends towards both the sides along the width direction of the block body to form rib plates; the lower lateral surfaces of the rib plates are respectively higher than those of the soil retaining body and the waterward body; two end faces of the soil retaining body in the height direction and two end faces of the soil retaining body in the width direction are respectively provided with grooves connected end to end. The building block has the beneficial effect that the building block is beneficial for preventing water resource loss, is beneficial to growth of fish and aquatic plant and is beneficial for successfully escaping in the emergency.