170 results about "Round window" patented technology

An apparatus may include a needle for sustained delivery of drugs and other agents to the inner ear or other tissues of a human or an animal. The needle can include an insertion stop, and can be placed through the round window membrane or through a surgically-prepared hole in a bone. The needle can be in fluid communication with a port and / or with a micro-infusion or osmotic pump. A cochlear implant electrode can be used instead of a needle.

An implantable middle ear hearing device having a tubular vibration transducer to drive a round window is designed to input sound to a round window opposite an oval window in an inner ear. The tubular vibration transducer has a unique structure that does not attenuate the magnitude of a signal, particularly, in a high frequency band. Sound delivery effect is much higher than those of conventional schemes. It is also possible to minimize difficulties associated with and problems resulting from the operation, which the conventional methods would have. Further, the transducer can have a relatively less compact than ossicle contact type transducers, and thus be easily fabricated. The hearing device can be applied to a sensorineural hearing loss patient with the ossicle damaged. Moreover, since sound is directly transmitted without through the ear drum and the ossicle, high efficiency sound delivery is achievable and hearing loss compensation are easy.

The present invention relates to a round window driving transducer for easy implantation and an implantable hearing device having the same. The round window driving transducer is implantable in the round window of the cochlea in the middle ear cavity, and has excellent high frequency characteristics, which can assist patients with sensorineural hearing loss to hear sound better. The round window driving transducer can be placed inside the middle ear cavity, radiate sound with high efficiency, and be implanted by surgery using a fixing part formed with shape memory alloy, shape memory resin, or a bendable spring structure. Further, the round window driving transducer can overcome problems of the prior art, such as a difficult surgery and low vibration efficiency, which would inevitably occur when floating mass transducers are implanted in a drilled groove in the bone or when various types of piezoelectric transducers are implanted in the round window.

A specialized drug delivery unit for inner ear treatment which employs a portion of carrier media material containing one or more therapeutic agents therein. The carrier media material is designed to release the therapeutic agents in a controlled manner over time. The drug delivery unit is sized for placement in the round window niche of a patient. The released therapeutic agents come in contact with the round window membrane and pass therethrough into the inner ear for treatment purposes. This system provides many benefits ranging from the ability to deliver drugs in a site specific, highly controlled manner to the transfer of such materials with minimal patient discomfort and monitoring requirements.

A mechanical stimulator for evoking a hearing percept by directly generating waves of fluid motion of fluid in a recipient's scala tympani. The stimulator comprises a sound processing unit configured to process a received sound signal; and an implantable stimulation arrangement, comprising: an actuator configured to receive electrical signals representing the processed sound signal and configured to vibrate in response to the electrical signals, a stapes prosthesis having first and second ends, the first end having a surface configured to be positioned abutting the round window in the recipient's cochlea, and wherein the first end surface is substantially orthogonal to a longitudinal axis extending through the actuator, an elongate rod extending longitudinally from the actuator connecting the actuator to the stapes prosthesis such that vibration of the actuator results in waves of fluid motion in a recipient's scala tympani that evoke a hearing percept of the received sound signal.

A heat flow meter of wall pure radiation heat flow in high temperature-pressure environment is characterized in that a sapphire crystal window is adopted for insulating the influences of convection and heat conducting, and a heat flow meter which determines radiation heat flow by measuring axial thermoelectric force of a heat absorption cylinder is adopted. The adopted sapphire crystal window is in single-sided convex structure which can effectively expand measurement visual angle, accurate design is carried out on a round window chamfer angle, thus further expanding the measuring angle of the radiation heat flow meter to be 150 degrees. The sapphire crystal window insulates the influences of two heat flows of convection and heat conducting to make the heat flow meter measure radiation heat flow only. The lower surface of a heat receiver is provided with a cooling construction to cool the lower surface thus causing the heat receiver to form stable axial temperature distribution, and the pure radiation heat flow of wall is obtained by measuring the temperature difference of the upper surface and the lower surface of the heat receiver.

Disclosed herein is a method of delivering a mutated tyrosine adeno-associated viral vector or a pharmaceutically active agent to an inner ear. The method comprises contacting the round window membrane with the vector or the pharmaceutically active agent, in which the permeability of the round window membrane having been enhanced to allow transport of the vector or the pharmaceutically active agent across it so as to deliver the vector or the pharmaceutically active agent to the inner ear. Also disclosed are methods to prevent or treat hearing loss and impaired balance in human subjects using the delivery method.

The invention relates to a hearing aid device for humans with impaired hearing, who have an at least partially functional cochlea and a functional nervous signalling pathway from the cochlea via the auditory nerve to the brain. The hearing aid device contains a receiver, a transducer of the sound or other acoustic signals into electrical current serving as a signal representing a sound, a pulsed irradiation source connected to the transducer for receiving the electrical current and for generating modulated pulsed irradiation in dependence from the electrical current, and preferably one or more optical fibres optically coupled to the exit of the pulsed irradiation source, wherein the optical path for conduction of irradiation within the device ends directly opposite a functional element of the natural vibration transduction pathway, e.g. adjacent the skull, the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the otic capsule, the round window membrane, or the oval window membrane.

An implantable microstimulator and a stimulating electrode are implanted to treat tinnitus. The microstimulator is connected to the stimulating electrode via a short, flexible lead. The electrode is implanted in the promontory of the cochlea or in the cochlear round window niche to deliver electrical stimulation to the auditory nervous system and thereby suppress or mask the tinnitus. The microstimulator may be surgically implanted through the ear canal, via a mastoidectomy or through the middle fossa, i.e., a supra-meatal approach. The microstimulator may be placed in middle ear cavity, a bony recess created in the bone surrounding the middle ear, the mastoid, the cochlea or a part of the temporal bone. In addition, the system may further include a test electrode, a test stimulator and a remote programming device that employs a bi-directional radio-frequency communication link to control and program the microstimulator and the test stimulator.

The invention discloses a broadband substrate integrated waveguide circulator and belongs to the technical field of microwave devices. The broadband substrate integrated waveguide circulator comprises a rectangular dielectric substrate 5, a back metal floor and a front metal pattern. A metal pattern 1 in a regular triangle shape is positioned in the middle of the front metal pattern, and the metal pattern 1, the dielectric substrate 5 and the back metal floor form a three-port substrate integrated waveguide structure in 120-degree rotational symmetry. The substrate integrated waveguide structure comprises a central round window, and a central junction gyromagnetic ferrite 3 is internally arranged in the round window. Three ports of the substrate integrated waveguide structure are formed by connecting three trapezoidal micro-strip transition lines 2 in quarter central wavelength with three 50-ohm standard micro-strip lines 6 serving as a T-type port and positioned at the edge of the substrate 5. The broadband substrate integrated waveguide circulator has high isolation performance within all X-bands (8.2GHz-12.4GHz), low insertion loss and low port standing waves, and has the advantages of miniaturization, high power, integration and low cost.

The invention provides a composite sub-pixel angle point positioning method based on curvature and a gray level and relates to the machine vision precise measurement technology research field. According to the method, firstly image pre-processing on a frame selection interest area is carried out, and burr and oil stain of an original image are eliminated; candidate angle points are extracted through an angle point detection method based on curvature characteristics; multiple dimensioned invariance of an angle point curvature angle and the gray level information in a circular window taking an angle point as a circle center are utilized to eliminate pseudo angle points, and contour end points are considered; the angle point and the contour end points are connected to acquire two straight lines, the two straight lines are taken as reference, edge points of the original image are screened, a point set of the two straight lines of to-be-detected angle points is acquired, the least square method is utilized for fitting to acquire two straight lines, and the intersection point is the angle point. The method is advantaged in that a problem of reduction of angle point detection reliability and accuracy caused by attachment existing in shaft workpieces is solved, the acquired angle point is closer to an actual angle point, and precision reaches a sub-pixel level.

The invention relates to an optical engine which comprises a cylinder cover, an original cylinder casing and a piston; a transparent quartz glass cylinder casing is arranged between the cylinder cover and the original cylinder casing; the piston is an extended piston; the top of the extended piston is provided with a round window; transparent quartz glass is arranged in the round window; the length of the transparent quartz glass cylinder casing is more than the sum of the stroke of the engine and the distance between a ring at the bottommost of the piston and the top surface of the piston; and an engine cylinder body, the original cylinder casing, the cylinder cover and the transparent quartz glass cylinder casing are fixedly connected by bolts.

The invention discloses a device for converting substrate integrated waveguide to coaxial waveguide, belonging to the technical field of microwave and millimeter wave devices. The device comprises a substrate integrated waveguide connector and a coaxial waveguide connector; a row of short-circuit through holes are arranged in one end of the substrate integrated waveguide on which the substrate integrated waveguide connector is located to connect two metal layers; the upper metal layer of a dielectric substrate close to one end of the short-circuit through hole is provided with a round window with the size equal to the diameter of an outer conductor of the coaxial waveguide; and the circle center of the round window is located on the central axis of the substrate integrated waveguide; a rectangular groove is arranged at the center of a round dielectric substrate exposed outside the round window; the front end of an inner conductor of the coaxial waveguide connector is processed into a slice probe which is inserted into the rectangular groove; and the outer conductor of the coaxial waveguide is contacted and fixed with the upper metal layer of the dielectric substrate. The inter-conversion between substrate integrated waveguide and coaxial waveguide with low reflection and low loss is realized. The device is small in size and easy and convenient to assemble and disassemble and can be used repeatedly, which is convenient for the testing and the utilization of substrate integrated waveguide devices and systems.

The disclosed subject matter relates to a system and method for delivery of therapeutic agent to the inner ear. The system includes a plurality of micro-needles which can be delivered to the round window membrane by a delivery device, e.g. catheter, and is capable of controlled penetration of the round window membrane to create temporary and self-closing perforations. In some embodiments the micro-needles are hollow with a lumen for local drug delivery into the perforations. In other embodiments the micro-needles are solid and include a coating of therapeutic agent on exterior surface for delivery into the perforations.

The present invention discloses an apparatus may include a needle for sustained delivery of drugs and other agents to the inner ear or other tissues of a human or an animal. The needle can include an insertion stop, and can be placed through the round window membrane or through a surgically-prepared hole in a bone. The needle can be in fluid communication with a port and / or with a micro-infusion or osmotic pump. A cochlear implant electrode can be used instead of a needle.

The invention relates to a three-dimensional visual physical simulation experimental device used for simulating indoor core flow experiments for non-homogenous reservoirs under high temperature and high pressure in the petroleum industry. The three-dimensional visual physical simulation experimental device mainly comprises a model body, an inner wall insulating coating, a gland, a model well mesh, a maturity connector, a main support and the like. The model body is provided with 8 seal screws. The gland is fixed to the outer side of the main support of the model body through an end cover. An internal thread of the gland is in connected fit with an external thread of the gland. A cap is parallelly disposed outside the gland. An internal thread of the cap is in connected fit with the external thread of the gland. The gland compresses an internal core through a hold-down bolt. The upper gland is evenly provided with bolt holes and a plurality of vertical holes. Injection wells and withdrawal wells can be simulated. Different well spacing manners and different well spaces can be simulated by changing the position of the device. The model body is provided with round windows in front and rear and at the bottom, and the round windows allow users to observe conveniently. The whole model is disposed on a rotating support and allows simulated stratum angle to be tilted. The three-dimensional visual physical simulation experimental device is made of stainless steel, is provided with fluororubber seal rings and accordingly is available for long-term operation at 120 DEG C.

The invention discloses an improved SIFI algorithm for image tampering forensics. The improved SIFI algorithm for the image tampering forensics improves: a) building an image scale space; b) positioning a feature point; c) forming feature vectors of the feature point; d) performing normalization processing on the feature vectors; e) serializing the feature vectors; f) judging tampering operation; g) judging the number of feature vector sets; h) equally dividing the feature vector sets; i) performing matching operation; j) highlighting image tampering positions. The improved SIFI algorithm for the image tampering forensics divides a round window which uses the feature point as the center and uses 4sigma as the radius into two concentric annuluses, respectively generates two 12 dimensional vectors in the central circle and the peripheral annulus so as to generate the feature vectors in 24 directions of the feature point, changes a prior mode of using 128 dimensional vectors, greatly reduces calculated amount of vector matching calculation, achieves high matching calculation efficiency of the feature vectors, and is suitable for tampering detection of a large number of pictures.

The invention relates to a composite nervous action potential tuning curve calibration and detection system. The composite nervous action potential tuning curve calibration and detection system is characterized by comprising a computer, an acoustic card, an acoustic sensor, a preamplifier, an electrode, a high-impedance input level, a bioelectric amplifier and earplugs. An audition testing platform is arranged in the computer and comprises a testing executing system and an acoustic card driving system, wherein the testing executing system comprises a plurality of calibration and detection modules. A system calibration and debugging module is used for calibrating and debugging the acoustic card and sensitivity of the acoustic sensor. An acoustic sensor position calibrating module is used for calibrating a position of the acoustic sensor testing an external auditory canal of an animal. An electrode position calibrating module is used for calibrating whether a recording electrode is disposed to testing round window membranes in the animal ears or not. A composite nervous action potential threshold curve detection module is used for testing stimulus intensity thresholds of composite nervous action potentials. A composite nervous action potential tuning curve detection module is used for detecting composite nervous action potential tuning curves. The composite nervous action potential tuning curve calibration and detection system can be widely applied to auditory detection.

Diagnosing or treating a human ear includes transporting a conjugated nanoparticle or a magnetically responsive nanoparticle into a human's middle or inner ear. Otologic nanophoresis includes electrically, magnetically or electromagnetically driving a nanoparticle through a membrane of the ear, including a tympanic membrane, a round window membrane, an oval window membrane, or a circulatory membrane. An otologic diagnostic device includes a nanoparticle conjugated with a material selected from the group consisting of lipids, proteins, growth factors, growth hormones, antioxidants, free radical scavengers, steroid preparations, and metabolically active substances; an otologic therapeutic device includes the same categories of substances and chemotherapeutic drugs. Another otologic composition includes a nanoparticle conjugated with a substance perceptible to magnetic resonance imaging.

The invention discloses a device for testing the mechanical property of a material at a low temperature. The lower end of a DC (direct current) motor is connected with a transmission shaft, enters a low-temperature chamber, and is connected with a vaporizer; a fan is arranged inside the vaporizer at the lower end of the transmission shaft; a cold source inlet pipe enters the low-temperature chamber from the outside and is connected with the right end of the vaporizer; an air inlet pipe enters the low-temperature chamber from the outside and is connected with the left end of the vaporizer; the lower end of a temperature controller is connected with a temperature sensor, enters the low-temperature chamber, and is arranged under the vaporizer; round holes are formed in the upper and lower ends on the left side of the low-temperature chamber; an externally-connected loading rod penetrates through the upper end lower round holes respectively; upper and lower semi-circle sealing plates are arranged at connecting positions of the upper and lower round holes and the externally-connected loading rod; and a round window is formed in the center at the top outside the low-temperature chamber. The device has the advantages of small size, simple structure, accurate temperature control, even indoor temperature, digital temperature display, and the like.

The present disclosure provides a three-coil type round window driving vibrator, which includes a permanent magnet having the same magnetic poles adjoining each other and is designed to allow electric current flowing through coils to run in opposite directions in order to increase driving force without being affected by an external magnetic field. The round window driving vibrator includes a permanent magnet having three poles of SNS or NSN, a coil member wound around an outer periphery of the permanent magnet, and a vibration member connected to one end of the permanent magnet. Here, the coil member includes a first coil wound around a middle section of the permanent magnet and second and third coils wound around upper and lower sections of the permanent magnet, respectively.

The invention relates to a millimeter wave multi-pixel refrigeration receiver dewar. The cold shield of the dewar can effectively shield the thermal radiation without affecting the sensitivity of a receiver, thereby lowering the requirement of the refrigerating machine on refrigeration power. The millimeter wave multi-pixel refrigeration receiver dewar comprises a vacuum chamber and a cold shield arranged in the vacuum chamber, wherein the cold shield is provided with a plurality of circular windows; the circular windows are corresponding to detectors arranged in the cold shield; each circular window comprises a through hole and a dielectric lens; the through hole is arranged on the upper surface of the cold shield; the dielectric lens covers on the through hole and has certain thickness; and the edge of the dielectric lens is fixed on the upper surface of the cold shield.

The invention belongs to the field of buildings, and particularly relates to a temperature control type shading building ventilated window. The temperature control type shading building ventilated window comprises a round window frame, the window frame is internally provided with a round window plate located in the same plane with the window frame, and the window plate is fixedly connected with the inner side wall of the window frame through a plurality of fixing blocks; an arc-shaped airbags are fixedly connected between every two adjacent fixing blocks; the arc-shaped airbags, the fixing blocks and the window plate jointly form ventilation gaps for air circulating; the peripheral side wall of the window plate is provided with sealing grooves corresponding to the positions of the arc-shaped airbags, thus, when the arc-shaped airbags expand, the arc-shaped airbags can be completely embedded into the sealing grooves, and the ventilation gaps are sealed; the fixing block located on the lowermost side is a heat conducting block which is internally provided with a liquid storage cavity containing low-boiling-point evaporating liquid; and the fixing blocks are provided with through holes for communicating with the adjacent arc-shaped airbags. According to the temperature control type shading building ventilated window, by arranging the low-boiling-point evaporating liquid and the arc-shaped airbags, the arc-shaped airbags can seal or open the ventilation gaps according to temperature change, and the effect of regularly opening the window for ventilation is achieved.

The invention belongs to the technical field of kitchen appliances and particularly relates to an improved novel anti-overflow pot. The improved novel anti-overflow pot comprises a pot body, an outer pot, an inner pot, a pot cover, an anti-overflow steamer base, an anti-overflow steamer and a steamer cover, wherein the pot body comprises a box body, a stove and a pot body base; a tray is arranged on the upper surface of the pot body base; the tray supports and fixes the outer pot; a heating plate is arranged on the upper surface of the pot bottom of the outer pot; the inner pot is arranged on the heating plate; the outer pot is in clearance fit with the inner pot; a cavity is formed between the outer pot and the box body; a round window is arranged at the middle rear position of the stove; the pot cover is arranged on a pot opening of the inner pot; an anti-overflow air duct is formed between the pot cover and the stove; an anti-overflow fan is arranged below the stove and in the cavity between the outer pot and the box body; the anti-overflow air duct is communicated with an air outlet of the anti-overflow fan; a touch screen operation panel is arranged on the stove; the anti-overflow air duct is formed by installing an anti-overflow air duct base and an anti-overflow air duct upper cover in a buckling manner. The improved novel anti-overflow pot has the advantages of overflow prevention, energy saving and high efficiency.

The invention discloses a fast neutron detector resisting interference of strong gamma rays, comprising a piece of circular quartz glass, a visible light shielding cover, a micro channel plate, a liquid scintillator, a cavity for packaging the liquid scintillator, a signal input port, a signal output port, a power port, a gating circuit board, and a high-voltage power supply. The cavity is composed of a cylindrical cavity and a conical cavity connected together. The conical end of the conical cavity is provided with a circular window which is sealed by the circular quartz glass. According to the invention, the liquid scintillator is put in the cavity as a response medium, and the liquid scintillator which is of fast response and low persistence can greatly restrain persistence produced by gamma radiation. A gating circuit on the gating circuit board controls the opening time of the circular micro channel plate according to the actual situation in order to avoid the interference of strong gamma rays. The problem that strong gamma radiation signals interfere with fast neutron signals is solved.

The present invention relates to medical equipment technology, and is one inner ear round window membrane administration device for treating inner ear diseases. The administration device is one forked-head two cavity duct comprising one duct head, one duct body and one duct tail. The duct body is divided longitudinally into two cavities communicated separately to two forked branches of the duct head, and each of the two branches has one joint in the outlet for connection to syringe cylinder. The duct tail is expanded to form one medicine storing chamber communicated to two cavities in the duct body, and has one round window membrane sucker in the end opening. One metal electrode inserted into the partition between two cavities has outer end extending beyond the head fork and spherical inner end inserted into the medicine storing chamber. One skin fixing ring is set in the outer wall of the duct body. The present invention is reliable, convenient and determined in healing effect.

A round window excitation type manual middle lug actuator with the initial pressure capable of being monitored comprises a supporting device, a distance adjusting device, a shell and a telescopic device, the front end of the supporting device is connected with the distance adjusting device, the shell and the front end of the distance adjusting device form a moving pair, the whole telescopic deviceis located in the shell, and the front end of the telescopic device directly acts on a round window film; The supporting device is fixed on a bone wall opposite to the round window membrane through an implantation operation; Telescopic device comprises an expansion device, a load indicator, a spring and a coupling rod, the spring is arranged in the center of the rear end of the expansion piece and abuts against the rear wall of the inner side of the shell, the load indicator is arranged at the top of the rear end of the expansion piece, the expansion piece moves in the axial direction of theshell, the coupling rod is arranged at the front end of the expansion piece and directly acts on the round window film, and the maximum diameter of the front end of the coupling rod is 1 mm. The support rigidity of the actuator is improved, the loss of the output quantity of the actuator is reduced, the hearing compensation effect of the actuator is improved, and the initial pressure between the actuator and a round window film can be monitored.

A soft, ball-shaped middle-ear electrode is inserted and wedged into the natural cavity that exists in front of the round window. An electrical pulse generator connected to the soft, ball-shaped electrode provides electrical stimulation to the region surrounding the round window for the purpose of suppressing tinnitus or to improve hearing.

The invention discloses a device for evoking a brain stem frequency following reaction through electrical stimulation and a verification method. The device comprises an evoking potential recorder, the triggering signal output end of the evoking potential recorder converts input single path of signals into two paths of signals through a signal converter to control a channel (1) and a channel (2) of a generator, and electrical stimulation signals in the channel (1) and the channel (2) are opposite in polarity; the channel (1) and the channel (2) are connected to a stimulation electrode through an electrical stimulation signal isolator; the positive pole of the stimulation electrode is used for placing a round window niche of a user, and the negative pole of the stimulation electrode is used for making subcutaneous contact with the osseous external auditory canal; the positive pole of the evoking potential recorder is used for being placed in the center of a connecting line of the binaural calvarium of the user, the negative pole of the evoking potential recorder is used for making subcutaneous contact with the opposite side mastoid process of the user, and a reference electrode of the evoking potential recorder is used for making subcutaneous contact with the nasal tip of the user; the evoking potential recorder is connected with a signal processing module. The device can successfully evoke the brain stem frequency following reaction for an animal with the auditory periphery injured.