125 results about "Oxygen level" patented technology

A blood pump-oxygenator system (250A, 250B, 250C) for increasing perfusion and oxygen levels in the body of a patient (P), comprising: a blood inlet (80) and a blood outlet (90) connected to form a circuit operable as a cardiopulmonary bypass system suitable for extracorporeal treatment of the blood of the patient; a first blood pump (11) and a first oxygenator (20), wherein the first blood pump (11) is configured to deliver blood from the patient (P) through the circuit to the blood inflow port (80), through the first oxygenator (20), out of the blood outflow port (90) and back to the patient (P). The system further comprises a second blood pump (13) and a second oxygenator (21), wherein the second blood pump (13) is configured to deliver blood from the patient (P) through the circuit to the blood inflow port (80), through the second oxygenator (20), out of the blood outflow port (90) and back to the patient (P). The circuit comprises a first branch (101) and a second branch (102) arranged in parallel with each other, the first branch (101) accommodating the first blood pump (11) and the first oxygenator (20), and the second branch (102) accommodating the second blood pump (13) and the second oxygenator (21). The system further comprises a pump control unit (290) wherein the first and second blood pumps (11, 13) are configured to be controlled by the pump control unit (290) to increase or decrease the blood flow through the corresponding oxygenator (20, 21) by changing the proportion of the blood flow through the first and second oxygenator (20, 21).

In an open-loop heat removal system for a building such as a data center or a home, cool air is supplied to the building by a chilling unit and hot air is expelled from the building without recycling, recirculating, or re-cooling the hot air. For fire suppression, the system receives temperature reading(s) from temperature sensor(s) and determines whether any temperature reading reaches or exceeds a temperature that indicates presence of a fire. If so, a louver positioned over an inlet module is automatically or programmatically closed, shutting off air supply to the building. The system determines whether the building is under a negative pressure internally. If not, an exhaust fan at the outlet of the building is turned on to create a negative pressure internally. The system determines whether an oxygen level of the building indicates that the fire has been contained. If not, a sprinkler system is activated.

In an open-loop heat removal system for a building such as a data center or a home, cool air is supplied to the building by a chilling unit and hot air is expelled from the building without recycling, recirculating, or re-cooling the hot air. For fire suppression, the system receives temperature reading(s) from temperature sensor(s) and determines whether any temperature reading reaches or exceeds a temperature that indicates presence of a fire. If so, a louver positioned over an inlet module is automatically or programmatically closed, shutting off air supply to the building. The system determines whether the building is under a negative pressure internally. If not, an exhaust fan at the outlet of the building is turned on to create a negative pressure internally. The system determines whether an oxygen level of the building indicates that the fire has been contained. If not, a sprinkler system is activated.

The invention discloses a method for improving the toughness performance of low-alloy high-strength steel by adding rare earth cerium-iron alloy and application of the method, and belongs to the technical field of steel rolling and product development. According to the method, narrow window control is conducted on converter steelmaking, LF refining and RH vacuum treatment in an existing wide and thick plate low-alloy high-strength toughness steel production technological process, a cerium-iron alloy is added after alloying in the RH vacuum treatment process is finished and circulated, temperature measurement and oxygen determination are conducted before the cerium-iron alloy is added, and the active oxygen is smaller than or equal to 3 ppm. The method is applied to an RH vacuum treatment step of industrial production of wide and thick plate Q690E steel and comprises the following steps: adding a titanium-iron alloy and a ferroboron alloy in sequence for alloying, circulating after alloying is finished, and adding a cerium-iron alloy; and carrying out soft blowing after the RH vacuum treatment is finished. After the rare earth cerium-iron alloy is added, the average size of low-alloy high-strength steel inclusions is remarkably reduced, the average grain size is greatly small, the average width of a martensite lath bundle is narrowed by less than 200nm, and the toughness performance is remarkably improved.

An embodiment for determining a blood-oxygen level (e.g., SpO2) of a subject includes exposing a body portion of the subject to more than two wavelengths of electromagnetic energy, receiving a portion of the more than two wavelengths redirected by the body portion, converting the received portion of the redirected more-than-two wavelengths into signals each representing a respective group of at least one of the more than two wavelengths, and determining the blood-oxygen level (e.g., SpO2) of the subject in response to the signals. For example, such an embodiment can determine the blood-oxygen level of the subject with little or no skin-tone bias. That is, such an embodiment can determine the blood-oxygen level of the subject independently of the subject's skin tone, i.e., with little or no skin-tone-induced corruption of the determined blood-oxygen level.

Existing pulse oximeters have impaired accuracy in measuring blood oxygen levels (SpO2) in patients of color, where the presence of melanin in the skin tends to interfere with measurements of pulse oximetry, resulting in an overestimation of SpO2. Thus, the pulse oximeter often reports a higher oxygen saturation for patients with darker skin tones, often with increasing bias as the actual saturation (SaO2) decreases. This bias is further reinforced by calibration based on individuals with light skin pigmentation, which may lead to inequitable healthcare for patients of color. Our proposed solution is to modify current pulse oximetry calculations—which utilize the relative tissue absorbance of red and infrared light to estimate SpO2—to account for the concentration of melanin by additionally measuring the skin absorbance of UV˜A light. This derived concentration of melanin can then be used to modify the pulse oximetry algorithm output, thus estimating SpO2 more accurately for patients of color.

A medical system configured to detect and / or monitor one or more physiological parameters of the patient including an electroencephalogram (EEG) of the patient, a oxygen level of the blood patient (e.g., a jugular venous oxygen saturation (SjVO2)), and / or a blood flow of the patient (e.g., a cerebral blood flow). The medical system may include processing circuitry configured to monitor the physiological parameters and compare the physiological parameters to one or more thresholds. The medical system may be configured to indicate that the patient may have experienced a stroke based on the comparison of the physiological parameters with the thresholds. In examples, the processing circuitry is configured to indicate a type of stroke the patient may have experienced based on the comparison.

A misting device for aeroponically cultivating plants in a growing chamber provided with fluid in a water reservoir, comprising: an ultrasonic atomization transducer (UAT) configured to generate a misting spray in the presence of fluid; and a wicking means configured to transport fluid from the water reservoir by capillary action to the ultrasonic atomization transducer, when the lower end of the wicking means is disposed in contact with the water reservoir. Also disclosed is a growing system for aeroponically cultivating plants comprising: a growing chamber for containing the plants, and provided with a water reservoir containing fluid; and misting devices. The misting devices are oriented such that the respective misting sprays interact with each other to create an ultra-fine mist inside the growing chamber. In some aspects, the water reservoir may further comprise nanobubbles to maintain elevated dissolved oxygen levels and improve root-zone oxygenation.

Provided herein are methods of selecting an optimal fixed orientation of a dissolved oxygen (DO) probe in a perfusion bioreactor and culturing a mammalian cell in a perfusion bioreactor having the DO probe positioned at the selected fixed orientation.

The application provides a deep water sediment-water interface simulation experiment device, which comprises a pressure tank, a pressurized gas tank, a circulating water temperature control unit, a sampling tank, a releasing device and a planar light pole unit; the pressurized tank and the sampling tank are connected with the pressure tank, and the sampling tank is used for sampling and sampling; the water inlet and the water outlet of the circulating water temperature control unit are connected with the two sides of the pressure tank; the releasing device and the planar light pole unit are arranged in the pressure tank, the releasing device is used for releasing the sampling device, and the planar light pole unit is used for emitting a fluorescent signal. The application can simulate the hydrostatic pressure, the dissolved oxygen level, the temperature and other related physical and chemical parameters of the water bottom sediment-water interface within 90m, and can reduce the limitation and economic pressure faced by the environmental in-situ monitoring.

The present invention relates to a method by which intravenous fluids, blood or artificial blood containing high levels of mechanically infused dissolved oxygen can be used to maintain appropriate oxygen levels in venous blood to provide short term oxygenation support to a compromised patient or trauma patient. In one aspect, a system and method for oxygenating a biological fluid for a compromised subject or trauma subject in need of oxygenation support to maintain the subject at an appropriate oxygen level is provided, the method comprising: supplying oxygen from an oxygen source; and dissolving an amount of the supplied oxygen into the biological fluid to obtain an oxygen enriched biological fluid.

This invention discloses a method for assessing the oxidation state of specialty berry wines based on dissolved oxygen and oxidation-reduction potential (ORP). Using berry wines aged for 8 months with dissolved oxygen levels less than 0.2 mg / L and ORP less than -50 mV as a benchmark, wine samples with different initial dissolved oxygen gradients were prepared and accelerated to 4 weeks at 40°C. Dissolved oxygen, ORP, anthocyanin retention rate, total phenolic retention rate, ΔE, and sensory scores were simultaneously measured. A dissolved oxygen-ORP linear regression model was established, and piecewise linear regression was used to identify two key inflection points. Based on this, the oxidation state was classified into five levels: safe reducing state, transitional state, slightly oxidized state, moderately oxidized state, and heavily oxidized state. Quality index ranges and production recommendations for each level were provided. After 12 months of bottle storage validation, the model's prediction accuracy reached 92.5%. This invention can rapidly assess the oxidation state of specialty berry wines and guide precise oxygen control.

This invention discloses a method for dynamic monitoring of dissolved oxygen and identification of oxidation risks throughout the entire fermentation process of specialty berry wines. For seven berry species—blueberry, raspberry, mulberry, blackberry, black chokeberry, red dragon fruit, and blackcurrant—dissolved oxygen data is systematically collected at 13 key stages, including crushing, fermentation, filtration, fining, aging, cold treatment, and bottling, to create a "dissolved oxygen dynamic spectrum" for each variety. By analyzing the peak dissolved oxygen levels and their rates of change, crushing, fining, cold treatment, and bottling are identified as four high-risk oxidation stages. Furthermore, based on the rate of dissolved oxygen decrease after crushing, the seven berry species are categorized into three types: oxidation buffering, oxidation consuming, and rapid oxygen consuming. This invention achieves a multi-variety, full-chain systematic assessment of oxidation risks, providing a quantitative basis for precise oxidation control in specialty berry wines.

A system for reducing emissions from an internal combustion engine includes a combustion chamber having an inlet and an outlet, a fuel delivery device for delivering fuel to the combustion chamber, and a control system for controlling a fuel to oxidizer ratio in the combustion chamber. A method of reducing emissions from an internal combustion engine includes the steps of: establishing a flow of oxygen-containing gas through a combustion chamber having an inlet and an outlet; introducing flow of fuel into the combustion chamber; igniting the fuel in the combustion chamber; operating an internal combustion engine to develop a stream of exhaust gas; introducing a flow of the exhaust gas into the combustion chamber; and controlling the flow of exhaust gas and the flow of fuel to minimize oxygen levels in exhaust gases downstream of the outlet.

A wearable device with a blood oxygen measurement function, comprising: at least one light source, configured to emit light; an optical sensor, configured to sense an optical signal generated according to reflected light of the light; a pressure sensor, configured to sense a pressure provided by a user wearing the wearable device; a processing circuit, configured to calibrate the optical signal to generate a calibrated optical signal, and configured to compute a blood oxygen level according to the calibrated optical signal; and a pressure adjusting structure, configured to adjust an internal wearing space of the wearable device, wherein the pressure changes corresponding to the internal wearing space. A blood oxygen measurement method which the wearable device can use is also disclosed. Thereby the optical signal may be calibrated corresponding to the state of the wearable device. By this way, the blood oxygen measurement may be more accurate.

A breathing system that supplies air containing reduced oxygen levels includes a mask, a housing, a valve or other air flow restrictor, and one or more sensors that detect the amount of oxygen present in the system. A user breathes into the mask, after which the air is moved into the housing, and subsequently through an expandable reservoir after which the air can be re-breathed by the user. One or more sensors may be mounted to the user as well as contained within the housing. In the event that the amount of oxygen in the system's recirculated air falls below a predetermined level, the valve may be opened to allow ambient air containing higher levels of oxygen to enter the system. The system may contain a carbon dioxide scrub medium, as well as other filters to maintain desired characteristic of the air within the system.

A garment can include a pocket to hold a removable electronic device. The electronic device can sense body core temperature, heart rate, skin conductivity, blood oxygen level, and geo-spatial location of the wearer, and transmit this data wirelessly to a mapping application. A viewer of the application can track the location and the health status of the wearer. A leader at a search and rescue command post can easily monitor both the location and well-being of personnel through the mapping application while they are on a mission. An algorithm on the backend can determine a health status color based on the sensor data. The pocket design facilitates insertion and removal of the electronics, and ensures that sensors are positioned at optimal locations on the body.

A catheter assembly or other elongate tubular device for use in establishing vascular or other access within the body of a patient is disclosed. The catheter assembly is equipped with one or more sensors that enable monitoring of one or more physiological aspects of the patient or physical aspect of the catheter assembly itself when the catheter assembly is disposed within the patient. Such aspects include central venous pressure, body temperature, ECG heart signals, oxygen levels, ultrasound data, glucose, etc. The catheter assembly includes the ability to wirelessly transmit or otherwise forward data relating to the detected physiological parameters to another location, such as a patient electronic medical record, smartphone or other mobile device, nurse station, etc. Catheter assemblies configured to detect the frequency of catheter flushing, flushing quality, etc., are also disclosed.

1. Name of the product in this design: Finger Pulse Oximeter. 2. Purpose of this design: To measure human blood oxygen levels. 3. The key design elements of this product are the combination of shape, pattern, and color. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. The design for which protection is sought includes color.

A wearable, skin adhesive blood gas monitoring device detects both oxygen and carbon dioxide for accommodating a potential inaccuracy in an oxygen level resulting from excessive carbon dioxide. Photoluminescent films in conjunction with a compact form-factor circuit provide a wearable and unobtrusive device that adheres directly to the epidermal surface for computation of blood gas levels based on transcutaneous and reflective properties of the blood gases. A wireless medium such as Bluetooth® enables communication to a standalone or portable device such as a smartphone or similar personal device having an application (app) for receiving the computed signals. Conditions such as hypercarbia, which tend to result in higher levels of carbaminohemoglobin, or hemoglobin bound to CO2 instead of oxygen, tend to compromise computed oxygen levels by interpreting the CO2-bound hemoglobin as oxygenated blood.

The present disclosure relates to a method and a system to increase the dissolved oxygen content in a water body having a dissolved oxygen content of between 0 mg / l and 4 mg / l, or to anticipate a future drop of a dissolved oxygen content of a water body to between 0 mg / l and 4 mg / l, wherein the water body is non-stratified, or is stratified and comprises at least an epilimnion, wherein the method comprises a step a, wherein a stream of diluted aqueous nitrate containing liquid droplets of which at least part are diluted oxygenated aqueous nitrate containing liquid droplets are formed, and a subsequent step b, wherein the diluted aqueous nitrate containing liquid droplets of which at least part are oxygenated diluted aqueous nitrate containing liquid droplets are further spread, in case of a non-stratified water body, in a part of the water body or in the whole water body, and in case of a stratified water body, in a part of the epilimnion of the water body or in the whole epilimnion of the water body.

This utility model discloses a ventilation device for chicken houses that combines uniform air supply and oxygenation with temperature regulation. Applied within a chicken house, it includes an air heat exchanger, distribution pipes, air outlets, and a swing mechanism. The air heat exchanger is installed on one side of the chicken house. The distribution pipes are installed inside the chicken house via an air delivery mechanism that delivers fresh air to the vicinity of the livestock and poultry. The air outlets are located at the top of the chicken house and are equipped with an exhaust mechanism to expel hot air from the chicken house. The swing mechanism is installed on multiple distribution pipes to drive them to swing synchronously. This ventilation device for chicken houses combines uniform air supply and oxygenation with temperature regulation, enabling the even delivery of fresh air to the vicinity of the livestock and poultry while expelling hot air from the chicken house. It ensures adequate oxygen levels within the chicken house and achieves temperature regulation.

The utility model discloses a craft beer fermentation tank which comprises a tank body, a temperature control system, a pressure control system and an oxygen supply system, the temperature control system comprises a heating coil and a cooling coil which are arranged on the outer wall of the tank body, as well as a temperature sensor and a preset controller which are connected with the heating coil and the cooling coil, and is used for monitoring and adjusting the temperature in the fermentation tank in real time; the pressure control system comprises an adjustable pressure valve and a pressure sensor which are arranged at the top of the tank body, and the temperature, the pressure and the oxygen level in the fermentation tank can be accurately controlled through integration of the temperature control system, the pressure control system and the oxygen supply system, so that ideal conditions are provided for beer fermentation; the temperature and the pressure in the fermentation tank are monitored and adjusted in real time, the stable operation of the fermentation process is ensured, the quality and the taste of beer are improved, a proper amount of oxygen is supplied into the tank through the oxygen supply system, the activity of yeast can be promoted, and the fermentation speed is increased.

The invention discloses application of oxygen-carrying protein VHb in construction of high-yield astaxanthin engineering bacteria, and belongs to the technical field of biology. According to the method, carRPY27R, carB, fusion genes crtW-crtZ and GGPPS are iteratively integrated onto a yarrowia lipolytica chassis genome by utilizing a synthetic biological technology, so that two recombinant strains for producing astaxanthin are obtained. On the basis, the oxygen-carrying protein VHb from vitreoscilla is expressed, and compared with the oxygen-carrying protein VHb which is not expressed, the VHb is positioned to the endoplasmic reticulum, so that the accumulation level of astaxanthin is improved by 272.99%, and the biomass is improved by 94.15%. According to the method, the oxygen-carrying protein VHb is expressed on cytoplasm and organelle, so that the synthesis efficiency and biomass of astaxanthin are remarkably improved. In addition, the intracellular dissolved oxygen level is improved, so that the cost for improving the dissolved oxygen in the fermentation process is reduced.

A system for mapping oxygen levels in tumors includes a needle that is sized to deliver high dose rate brachytherapy to tissue into which the needle is inserted, where the needle includes a radio frequency micro-coil sensor positioned within a shaft of the needle and a spin probe mounted to an outer surface of the shaft of the needle. A processor is in communication with the needle and configured to move the radio frequency micro-coil sensor along the shaft of the needle. The processor is also configured to receive, from the radio frequency micro-coil sensor, oxygen level readings at a plurality of tissue locations along the shaft of the needle. The processor is also configured to generate an oxygen level mapping of the tissue based on the oxygen level readings received from the radio frequency micro-coil sensor.

The invention discloses a local space deoxidation / hypoxia control system and method based on an oxygen selective permeable membrane. The system comprises a fan, a filter screen device, an oxygen selective permeable membrane assembly, an air return pipe, a differential pressure sensor, a pressure regulating valve, a sensor, a control unit, a vacuum pump, an oxygen discharge pipe, a three-way regulating valve and a hypoxia air return pipe. According to the system, closed-loop circulation deoxidation is achieved through membrane separation: a fan sucks air in a closed space into a membrane assembly for oxygen-nitrogen separation, oxygen separated by the membrane is discharged from an oxygen discharge pipe through a three-way valve under the action of a vacuum pump, and nitrogen-rich low-oxygen gas flows back to the space through an air return pipe; the sensor and the control unit monitor the oxygen concentration in real time and adjust the opening degrees of the vacuum pump and the three-way valve, so that the space oxygen concentration is maintained at a set low oxygen level. The system automatically generates a low-oxygen environment through a membrane separation principle, an external nitrogen making device is not needed, and the operation cost and the energy consumption are reduced.

Disclosed herein are medical systems, devices, and methods for performing vascular treatments and diagnoses. A vascular device include an optical fiber including a single fiber core disposed offset from a central axis of the optical fiber. The single fiber enables logic of the system to perform determine multiple conditions of the device and the patient. The conditions may include one or more of blood flow parameters, infusate delivery parameters, location of the device within the patient, pH of the blood, oxygen level of the blood, damage to the optical fiber, or core temperature of the patient. The elongate medical device may be a catheter, a stylet, a guidewire, or a probe.

This invention discloses a two-dimensional hydrogen germanene nanosheet, its preparation method, and its applications. The two-dimensional hydrogen germanene nanosheet has an ultrathin layered structure, with covalently modified hydrogen atoms on its surface, a lateral dimension of 100–300 nm, and a thickness of 5–10 nm. When activated by a specific wavelength laser, the two-dimensional hydrogen germanene nanosheet can photoexcite and generate singlet oxygen to destroy bacterial biofilms and kill bacteria. Simultaneously, it consumes local oxygen to create a staged hypoxic microenvironment, thereby inhibiting excessive inflammatory responses. After the light exposure ends, as the local oxygen level naturally recovers, it can further enhance the infection clearance function of immune cells, achieving continuous clearance of residual infection. This invention, through staged dynamic regulation of oxygen partial pressure, synergistically integrates direct bactericidal and immune clearance processes, ensuring antibacterial strength while reducing the risk of tissue damage and infection recurrence. It is suitable for the safe and effective treatment of implant-related biofilm infections.

The invention discloses a wearable device with a blood oxygen measuring function and a blood oxygen measuring method, and the wearable device comprises a light source which is used for emitting light; an optical sensor for sensing an optical signal generated according to a reflected light of the light; the pressure sensor is used for sensing the pressure provided by a user wearing the wearable device; a processing circuit for correcting the optical signal to generate a corrected optical signal and for calculating a blood oxygen level according to the corrected optical signal; the pressure adjusting structure is used for adjusting the internal wearing space of the wearable device, and the pressure is changed along with the change of the internal wearing space. Therefore, the optical signal can be adjusted corresponding to the state of the wearable device, so that the blood oxygen measurement is more accurate.

The invention relates to an oxygen-releasing agent releasing underwater robot and a control method thereof, the oxygen-releasing agent releasing underwater robot comprises a releasing mechanism, and the releasing mechanism is used for releasing an oxygen-releasing agent; the walking mechanism is used for moving and transporting the putting mechanism; the lithium battery is fixed to the side edge of the walking mechanism through a battery box, and the lithium battery is used for providing a power source for the whole device; the main control board is fixed on the walking mechanism, and the main control board is used for controlling the whole device; the oxygen releasing agent is regularly and quantitatively conveyed into the drilling device from the storage bin and is put below the mud surface, so that the purpose of quickly and accurately putting the oxygen releasing agent into a river channel and a lake is achieved, the oxidation and reduction conditions of bottom mud and a water body are changed, the dissolved oxygen level is improved, a good removal effect on organic matters and blackening and odor-causing substances is achieved, and the service life of the oxygen releasing agent is prolonged. The method has a restoration effect on river bottom mud and a water body and is expected to provide technical support for ecological restoration of black and odorous water bodies in cities and towns in China.