62 results about "Biomedical sensors" patented technology

A flexible, elastic garment (1) is provided comprising biomedical sensors (3, 4, 5, 6), an electrical power distribution and data transmission bus (2, 7) and a coupling circuit for allowing contactless transmission of power and data between the sensors and a circuit external to the garment. The sensors (3, 4, 5, 6), and the bus (2, 7) for distributing the electrical power and/or transporting the data from the sensors in the garment are formed by elastic conducting yarns integrated into the fabric of the garment.

A multiple lumen catheter having a soft, tapered multiple lumen distal tip for insertion into a body vessel. One of the lumens is sized to pass over a guidewire such that the catheter can be inserted into the body vessel using the Seldinger technique. At least one medical implement lumen is used for placement or positioning of a biomedical sensor or other medical implement. For example, at least one optical fiber passing through the medical implement lumen may transmit and receive light at the distal tip for measuring oxygen saturation of the blood. The catheter may have a cylindrical catheter body to which the soft distal tip attaches. The soft tip reduces the possibility of vessel or tissue puncture and abrasion. The tip is constructed of a soft plastic or pliable material that yields easily when force is applied. For example, the tip may be made of a softer material than the catheter body, or if made of the same material, the tip can be configured with thinner walls or a higher air-to-material ratio cross-section. Various geometrical configurations and combinations of materials can be used to decrease the resistance of the tip to an applied load. One particular useful application for the catheter of the present invention is as a central venous catheter equipped with fibers for measuring oximetry. The fibers extend to the distal end of the tip and are preferably secured therein with minimal adhesive so as to limit the stiffness added to the tip. One particular useful construction is to secure the fibers within the medical implement lumen using adhesive only along a length of between about 0.5–3.5 mm.

An apparatus and corresponding method for providing data communications to and from a location within a body cavity in which an internal transmitter receives a first data stream from an in vivo sensor, electrode, or transducer. The internal transmitter is configured and arranged to asynchronously modulate the first data stream and to provide as an output a first optical signal carrying the asynchronously modulated first data stream. The apparatus further includes an external receiver that is configured and arranged external to the body cavity such that an optical input to the external receiver is optically coupled to the internal transmitter output and receives the optical signal therefrom. The external receiver asynchronously demodulates the received optical signal and provides as an output at least one signal indicative of the first data stream.

The invention discloses a high-conductivity polymer carbon nanotube composite material and a micro-processing method thereof. The invention is characterized in that the method comprises the following steps: adding 50-99.95 parts of polymer grain or powder, 0.05-20 parts of carbon nanotube, 0-15 parts of antioxidant and 0-15 parts of dispersant into a micro-extruder, a double-screw extruder or a double-screw extruder/micro-extruder combined facility, extruding at a screw rotation speed of 20-500rpm at a polymer melting or softening temperature of Tm+10 DEG C-Tm+80 DEG C for 1-3 times to obtainuniformly dispersed composite material grains, and carrying out micro extrusion, micro injection or micro compaction on the grains to prepare a high-conductivity micro product; or carrying out isothermal or non-isothermal heat treatment on the product in a baking oven with a temperature of Tm-80 DEG C-Tm+20 DEG C for 5 seconds to 1.5 hours; or carrying out after-treatment on the sample in microwaves, infrared rays or plasma. The high-conductivity polymer carbon nanotube composite material disclosed by the invention is used for preparing micro biomedical devices in minimally invasive operations, and used in the field of micro biomedical sensors, micro electronics, micro electro-mechanics or micro-robots.

A multiple lumen catheter having a soft, tapered multiple lumen distal tip for insertion into a body vessel. One of the lumens is sized to pass over a guidewire such that the catheter can be inserted into the body vessel using the Seldinger technique. At least one medical implement lumen is used for placement or positioning of a biomedical sensor or other medical implement. For example, at least one optical fiber passing through the medical implement lumen may transmit and receive light at the distal tip for measuring oxygen saturation of the blood. The catheter may have a cylindrical catheter body to which the soft distal tip attaches. The soft tip reduces the possibility of vessel or tissue puncture and abrasion. The tip is constructed of a soft plastic or pliable material that yields easily when force is applied. For example, the tip may be made of a softer material than the catheter body, or if made of the same material, the tip can be configured with thinner walls or a higher air-to-material ratio cross-section. Various geometrical configurations and combinations of materials can be used to decrease the flexible resistance of the tip to an applied load. One particular useful application for the catheter of the present invention is as a central venous catheter equipped with fibers for measuring oximetry. The fibers extend to the distal end of the tip and are preferably secured therein with minimal adhesive so as to limit the stiffness added to the tip. One particular useful construction is to secure the fibers within the medical implement lumen using adhesive only along a length of between about 0.5-3.5 mm.

The present invention provides a method for efficiently preparing graphene-like carbon nitride. The method is characterized by comprising: using a nitrogen-rich organic matter as a raw material, adding a microwave absorbing agent, mixing, placing into a ceramic crucible, placing the crucible into the center of an industrial high-energy resonant cavity, vacuumizing, and carrying out high-energy microwave irradiation heating so as to rapidly and efficiently prepare the graphene-like carbon nitride. According to the present invention, the obtained graphene-like carbon nitride has characteristics of high specific surface area, high yield and high purity, and can be used in the fields of degradation of organic matters, hydrogen production through photolysis of water, catalyst carriers, biomedical sensors, and the like.

A disposable self-powered biomedical sensor comprises a printed wet electrode on a substrate sheet. The wet electrode is provided with an electrolyte element to enhance the electrical contact with a surface to be measured. Moreover, a printed battery encapsulated in a hermetically sealed compartment is provided on the substrate sheet. The disposable self-powered sensor can be stored within an enclosure or a package which provides a proper atmosphere to prevent the drying of the electrolyte and prolong the shelf life of the sensors.

A biomedical sensor is provided. The biomedical sensor comprises a printed bio-potential electrode on the biomedical sheet sensor configured to provide an electrical contact with a surface to be measured, and a bi-stable printed electronic ink indicator provided on the biomedical sheet sensor and configured to indicate a loose contact of a bio-potential electrode operation by switching the color of the bi-stable indicator from a first color to a second color when a loose contact is detected.

The present disclosure provides a method and a system for fall detection. Measurement signals are received from a plurality of sensors to monitor user activities, the plurality of sensors including a motion sensor for collecting motion information and a biomedical sensor for collecting physiological information. According to a signal processing sequence, whether the measurement signals meet multiple qualifying conditions for a fall incident is determined. The multiple qualifying conditions include: a condition evaluating at least the motion information, and a condition evaluating at least the physiological information. The method further includes: when the measurement signals do not meet the multiple qualifying conditions, continuing to monitor the user activities; and when the measurement signals meet the multiple conditions, determining that a fall incident has occurred, and sending an alert message to a designated contact.

An electrically conductive fiber and a coupled biomedical sensor are described. An electrically conductive core of the fiber includes a multiplicity of synthetic conductive filaments and an outer nonconductive fiber layer. The sensor area of the electrically conductive fiber is coated by thin film of silver ink and thin film of silver-silver chloride ink. The electrically conductive fiber's porous surface contacts the thin silver ink coating and the silver coating contacts the silver-chloride ink coating. A surface of the biomedical sensor is coated by a thick film of ionically conductive media, containing an electrolyte, in contact with the silver-chloride coating. The electrolyte diffuses into a porous structure of electrically conductive yarn.

A biomedical sensor for detecting EMG signals may include a non-conducting fixed framework supporting a symmetrical arrangement of four electrode surfaces, configured as two signal detection contacts, each with a respective associated signal reference contact. The mechanical and electrical configuration act together to suppress movement artifact.

A biomedical sensor system is disclosed that includes a high impedance conductive electrode having an electrode impedance of at least about 20 kΩ/sq-mil, and a dielectric material on a first side of the electrode for receiving a discharge of an electrical signal from the dielectric material responsive to the presence of a time varying signal adjacent a second side of the dielectric material that is opposite the first side.

A biomedical sensor has conducting elements disposed at least partly over a skin-facing surface. A sensing element detects a signal representative of a physiological parameter of a body using the conducting elements. A storage device stores a physiological model. A processor determines sensor placement quality by comparing the signal to the model and operates an indicator to indicate the determined quality. A method of measuring using the sensor includes computing a measurement acceptance criterion using numerous measurements, determining whether a subsequent test measurement corresponds to the measurement acceptance criterion obtained from the computing step, and indicating the results via the indicator. A system for measuring a physiological property of the body includes the sensor, a user interface device to receive measurements from the sensor, and a processor associated with the user interface device and configured to provide feedback if the measurement does not meet a selected acceptance criterion.

An augmented reality system and method configured to automatically provide a user, such as a physician, with a real-time heads-up view of a patient's real-time medical status using an augmented reality headset. The system can automatically identify patients, pull up relevant medical records, obtain real-time biomedical sensor data from the patient, and display this to the user while, at the same time, allowing the user to directly view the patient through the headset's transparent lenses, and leaving the user's hands free to manipulate the patient or perform other functions. The system and method are particularly useful for intensive care units and other emergency medical situations where the user needs to get an almost instant understanding of the patient's status.

Disclosed herein are the methods to improve the electrical conductivity for micro-moulded plastic parts containing carbon nanotubes. The polymer/carbon nanotubes composites suitable for polymer micromoulding including 80˜99.95 wt % of a polymer pellet or powder, 0-2 wt % of antioxidant, 0-2 wt % of dispersant agent and 0.05-20 wt % of carbon nanotube with a diameter 0.5-200 nm and a length of 200 nm-20 μm are firstly prepared through melt extrusion. The plastic microparts are prepared by micromoulding of the polymer/carbon nanotubes composites including micro extrusion, micro injection and hot embossing at optimized processing conditions and then are subject to a post thermal treatment to enhance the electrical conductivity. The post thermal treatment methods include electric heating, microwave, infrared or plasma heating. The methods disclosed can be used to prepare electrical conductive biomedical implanted plastic micro devices for minimally invasive surgery, biomedical sensors, microelectrodes, drug delivery devices, automated pipetting systems, breathing tubes, EMI devices etc.

The invention discloses a silver nanowire/silk fibroin composite fiber and a preparation method thereof. A wet spinning technology is adopted. The method comprises the following steps: firstly, preparing a regenerated silk fibroin film; then, synthesizing silver nanowires, and dissolving the prepared silk fibroin film in a silver nanowire/acidic solvent dispersion system to form a silk fibroin/silver nanowire/acidic solvent spinning solution; finally, preparing the single-fibrous silver nanowire/silk fibroin composite fiber with high conductivity and high flexibility. The prepared silver nanowire/silk fibroin composite fiber has huge application prospect in the fields of wearable equipment, biomedical sensors, implantable devices, intelligent clothing, flexible solar cells and medical tissue engineering.

The invention discloses chitosan/zwitter-ion and acrylic acid copolymer double network self-healing hydrogel and a preparation method thereof, and relates to the technical field of hydrogel. The hydrogel is of a double network structure, and formed by a first network and a second network in a mutually penetrating mode, the first network is a physical cross-linking network formed by chitosan and polyvalent negative ions, the second network is a copolymer network formed by a zwitter-ion monomer and an acrylic acid monomer, the first network intersperses in the second network, the chitosan and the polyvalent negative ions are selected to form the first network, the zwitter-ion monomer and the acrylic acid monomer are selected to form the second network, the double network self-healing hydrogel, obtained by the cross-linking purely physical effect, with the mutually interspersed first network and the second network makes the hydrogel have excellent mechanical performance and self-healing ability, the high relative resistance change rate is provided when deformation occurs, and the chitosan/zwitter-ion and acrylic acid copolymer double network self-healing hydrogel has broad applicationprospects in the field of soft electronics, especially as biomedical sensors.

The invention relates to the technical field of biomedical sensors, and discloses an optical fiber surface plasma resonance sensor modified by a nano-composite structure. The optical fiber surface plasma resonance sensor comprises a sensing area arranged on an optical fiber, and the sensing area is composed of a fiber core layer, a bonding layer, a sensing dielectric layer and a two-dimensional nano material layer from inside to outside; and the length range of the sensing area is 15 +/-5 mm. Compared with other structures, the optical fiber surface plasma resonance sensor has the advantages that MoS2-graphene nano composite structure can utilize the characteristics of high optical absorption coefficient of MoS2 and large surface area-volume ratio of graphene, so that the detection performance of the SPR sensor is greatly improved. The optical fiber surface plasma resonance sensor also has the advantages of being small in size, high in sensitivity, non-toxic and pollution-free.