209 results about "Oxygen level" patented technology

The invention relates to the technical field of medical monitoring, and discloses a portable blood oxygen signal OSA intelligent detection method which comprises the following steps: acquiring a pulse wave signal through a blood oxygen sensor, generating an amplitude difference sequence and a period difference sequence in parallel, analyzing rhythm synchronism of the amplitude difference sequence and the period difference sequence, and judging a respiratory effort event when a real-time relation index deviates from a reference value. By capturing a pulse wave time sequence-amplitude decoupling phenomenon, direct perception of a specific mode process of an invalid respiratory effort signal is realized, a traditional hysteretic monitoring mode depending on blood oxygen decline is avoided, and meanwhile, the system has the internal capability of distinguishing physiological fluctuation and specific mode struggling of the signal, and is convenient to use. And a brand new solution is provided for early screening of light and moderate OSA.

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.

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.

A digital assistance system, method and device for assisting users. The digital assistance system includes an assistance device having a finger touch pad and sensors operably coupled with the finger touch pad and configured to measure at least one of a heart rate, a blood-oxygen level and a temperature of the user. The digital assistance device is also able to include a communication application for providing non-character based format media data communication via a Message Queueing Telemetry Transport (MQTT) communication protocol.

The invention discloses a life safety monitoring ring, and relates to the technical field of intelligent wearing and health monitoring, the life safety monitoring ring comprises a ring body, the ring body is provided with a charging port, an infrared photosensitive port, a heart rate and blood oxygen sensor, a temperature sensor, a three-color indicating lamp, a three-axis acceleration sensor, a Bluetooth module and an MCU. The ring is small in size, convenient to wear, capable of monitoring the heart rate, blood oxygen level and finger temperature of a wearer in real time, discovering abnormal conditions in time and triggering first-aid signals, easy to operate and suitable for various use scenes, the ring can transmit vital signs and exercise amount data of the wearer in real time, the background server can analyze the data, and the ring is convenient to use. Abnormity can be found in time, corresponding measures are taken, the three-color indicator lamp can clearly indicate the physical condition of the wearer, and rescue workers can conveniently and rapidly judge the state of the wearer; and a wearer can quickly trigger an emergency signal in an emergency through the MCU, so that the rescue efficiency is improved.

Described herein are sensors for measuring various parameters. The sensors may be used in systems, devices, and methods for controlling blood flow or for measuring (e.g., monitoring) blood pressure, pH, or analyte levels such as a lactate level, an oxygen level, and / or a carbon dioxide level. The sensors may include a membrane configured to generate a measurable response (e.g., a change in an electrical signal such as resistance, capacitance, current, voltage) when the membrane interacts with a parameter of interest. In some instances, the sensors may include a piezoresistive MEMS subassembly. In other instances, the sensors may include an electrochemical membrane.

A smart collar device is disclosed that is a durable pet collar that can be attached to a body harness or used individually. The smart collar device has electronic capabilities that monitor stress levels, oxygen levels, blood pressure, and heart rate. The smart collar may also include LED lights, GPS tracker, a camera and reflective straps. The smart collar can connect to an app to provide pet owners with data and reminders. The smart collar may be available in a wide variety of colors and sizes.

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.

The wearable electronic device may be equipped with sensors to measure heart rate, blood oxygen levels, respiratory rate, blood pressure, blood glucose levels, and skin temperature. The device may include graphene-based sensors to measure heart rate, blood oxygen levels, respiratory rate, blood pressure, blood glucose levels, and skin temperature. The device may include a process that uses capacitive measurements to determine reliability of biosensor measurements. Capacitive measurements may be made on the device and a quality of contact between the device and the wearer may be determined. When the quality of contact between the device and its wearer is insufficient for reliable biosensor measurements, the device may display an alert to the wearer.

Described herein are sensors for measuring various parameters. The sensors may be used in systems, devices, and methods for controlling blood flow or for measuring (e.g., monitoring) blood pressure, pH, or analyte levels such as a lactate level, an oxygen level, and / or a carbon dioxide level. The sensors may include a membrane configured to generate a measurable response (e.g., a change in an electrical signal such as resistance, capacitance, current, voltage) when the membrane interacts with a parameter of interest. In some instances, the sensors may include a piezoresistive MEMS subassembly. In other instances, the sensors may include an electrochemical membrane.

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.

The invention discloses a motion armband monitoring system and method, and the method comprises the following steps: setting an initial respiratory rate detection period based on the normal motion intensity and physiological needs of a user, building a standardized baseline, and guaranteeing conventional monitoring on the premise of not interfering the normal activities of the user; during respiratory rate detection, blood oxygen levels are monitored in real time by a sensor. According to the method, a personalized initial respiratory frequency detection period is set, monitoring is carried out according to the exercise intensity and physiological needs of a user, it is ensured that exercise is not disturbed, after the blood oxygen change trend is quantized, the future trend is predicted through a support vector machine regression model, the detection period is dynamically adjusted through a clustering analysis algorithm, and the accuracy of the detection period is improved. The method can flexibly adapt to physiological changes of a user, can accurately recognize the blood oxygen decreasing trend in real time, improves the system reaction sensitivity by intelligently adjusting the detection period, ensures that the user is timely intervened in the case of a low oxygen risk, and effectively prevents health crises such as acute hypoxia.

The present invention relates to a fish farm feeding control method by which the feeding amount of feed is controlled on the basis of the change pattern of dissolved oxygen levels such that very low-cost installation is possible, high durability is provided, and application to various water quality environments and various types of fish is possible, and thus significant financial help can be provided to fish farmers who experience difficulties of rising feed costs and the like.

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.

In an open-loop heat removal system for a building, such as a data center or a residence, a refrigeration unit supplies cold air into the building, hot air is discharged from the building, and the hot air is not recovered, recirculated or recooled. To suppress a fire, the system receives temperature readings from one or more temperature sensors and determines if any temperature readings reach or exceed a temperature indicative of the presence of a fire. If so, a shutter located above the inlet module is closed automatically or in a programmed manner, thereby cutting off the supply of air to the building. The system determines whether the interior of the building is under negative pressure. If not, an exhaust fan at the exit of the building is turned on to generate negative pressure in the building. The system determines whether the oxygen level of the building indicates that the fire behavior has been suppressed. And if not, activating the water spraying fire extinguishing system.

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.

The present invention relates to a design method of a gain-scheduled model predictive controller for multiple working points in aquaculture. By designing a basic MPC controller, multiple local linear sub-models with different working points are used to approximate the global non-linear dynamics. For each sub-model with different working points of the dissolved oxygen concentration in the recirculating aquaculture, sub-MPC controllers with different functions are designed. Combining the circadian rhythm of the linear sub-model under different working conditions of the dissolved oxygen in the recirculating aquaculture, a gain-scheduled signal is designed for the sub-MPC controller to adapt its stability and robustness. The sub-MPC controllers are switched through the gain-scheduled signal for overall scheduling control. The sub-MPC controllers are switched between each other to complete the design of the GSMPC controller. The performance of the GSMPC controller is evaluated using IAE, ISE, and IAC. Considering the control accuracy and the energy consumption generated by the control actions comprehensively for evaluation, its performance is confirmed, improving the control accuracy and reducing the energy consumption, and it can be effectively used for the long-term precise control of the dissolved oxygen level in aquaculture.

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.

A dressing for treating a tissue site with negative pressure includes a cover, a wound contact layer, a manifold, and at least one sensor. The cover includes a first surface and a second surface. The wound contact layer includes a first surface and a second surface, wherein the second surface of the wound contact layer is configured to contact the tissue site. The manifold includes a first surface and a second surface. The manifold is configured to be disposed between the second surface of the cover and the first surface of the wound contact layer. The at least one sensor may include a plurality of oxygen sensing molecules dissolved in a polymer matrix. The at least one sensor is configured to change color to indicate a sensed oxygen level when the at least one sensor is acted on by the light source.

The present invention relates to a breathing detection system, comprising: a mask, configured to cover at least part of the user's face to transfer oxygen to the user; an oxygen supply device, configured to provide oxygen to the user through the mask; a first monitoring unit, configured to monitor physiological parameters that change with changes in the partial pressure of carbon dioxide in the user's arterial blood; and a central control unit, the central control unit is respectively connected to the oxygen supply device and the first monitoring unit for communication, and the central control unit is configured to: when the physiological parameter obtained by the first monitoring unit exceeds a preset range, adjust the oxygen supply device to an intermittent oxygen supply mode to adjust the amount of oxygen provided by the oxygen supply device, thereby adjusting the oxygenation level. The present invention only needs to turn on and off the oxygen supply according to the patient's breathing stage, and does not need to set parameters such as oxygen flow or oxygen concentration multiple times.

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.

A method of implementing changes in deoxyhemoglobin concentration, the method comprising: targeting a sequence of partial pressures of oxygen in arterial blood (PaCh) values in a subject using a sequential gas delivery device in a periodic input pattern; measuring a blood-oxygen level dependent (BOLD) signal in a voxel of the subject's brain using a magnetic resonance imaging device while targeting the sequence of values; comparing the pattern to the signal; and determining a vascular tissue characteristic (vessel type, vessel orientation, or pathological condition) for the voxel based on the comparison.

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.

The invention discloses a school bus safety guarantee system for driver sudden illness, which takes a control unit as a core and is controlled through a processing mechanism, a monitoring mechanism and a vehicle control mechanism. The system has the beneficial effects that through operation of the detection mechanism, the heart rate bracelet, the body temperature detector and the camera are used for monitoring and judging the heart rate, the blood oxygen value and the body temperature condition of a school bus driver, and a warning prompt is given before an abnormal condition occurs; a driver can know and attract attention in advance and prepare for prevention in advance, so that potential safety hazards during school bus driving are reduced; through the application of the vehicle control mechanism, after an emergency situation occurs, the vehicle is detected through the brake assist device, the laser radar and the vehicle speed sensor, the school bus is automatically braked and stopped when necessary, the situation that the school bus continues to run without control is avoided, and therefore the safety of the school bus during running is improved.

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.

A digestive system simulator apparatus including at least one mobile rack and cabinets with 500 ml or 1500 ml reactors containing support for accessories, light indicator, bottles of acid and alkaline solution arranged in the front part of the support for accessories, a mechanism for coupling a hose to transfer acid or alkaline solution to the main peristaltic pump and, optionally, to the backup peristaltic pumps. The 500 ml or 1500 ml glass reactor contains means for magnetic and / or mechanical stirring, a mechanism for maintaining the temperature, a lid with multiple inlets, such as for pH sensor, temperature sensor, oxygen level sensor, pipette, inlet for backup connection or ammonia level sensor, allowing the connection of the hose for fluid transfer between reactors, being controlled by specific software operating on a computer, to control the entire apparatus automatically, as programmed by the user.