Abstract: Methods and systems are disclosed relating to a lens system that allows for simultaneous focus of near and far-away images with one pair of glasses, heads-up-displays (HUDs), and the like, without the need to move the user's eyes. This lens system may be used in a HUD application, for example, where the user may focus on a display lens that may be approximately one inch from the eye to view computer-generated information such as altitude, temperature, directions, and the like, and simultaneously view the individual's surroundings. The lens system may include a liquid lens that when modulated may vary from a near-focus state to a far-focus state rapidly by using an electrowetting or piezoelectric hydraulic actuator. This variable rate lens may be multiplexed at a rate that allows both near and far-away images to appear in focus simultaneously through the advantageous use of a user's persistence of vision.

Abstract: Methods and systems are disclosed relating to a lens system that allows for simultaneous focus of near and far-away images with one pair of glasses, heads-up-displays (HUDs), and the like, without the need to move the user's eyes. This lens system may be used in a HUD application, for example, where the user may focus on a display lens that may be approximately one inch from the eye to view computer-generated information such as altitude, temperature, directions, and the like, and simultaneously view the individual's surroundings. The lens system may include a liquid lens that when modulated may vary from a near-focus state to a far-focus state rapidly by using an electrowetting or piezoelectric hydraulic actuator. This variable rate lens may be multiplexed at a rate that allows both near and far-away images to appear in focus simultaneously through the advantageous use of a user's persistence of vision.

Abstract: An ultrasound device, including (i) an ultrasound transducer, and (ii) a coupling material in contact with the ultrasound transducer is presented. The coupling material can comprise a solid component and a liquid component, wherein the liquid component is absorbed within the solid component and forms a microscopic liquid layer on a surface of the solid component, through which acoustic energy from the ultrasound transducer can be conducted. The device can be mounted to an external body surface proximate to a portion of the lumen, allowing the device to measure the rate at which a component moves through the lumen. Also provided are methods for making the device and using the device to determine a physiological parameter based on at least the flow rate of a component through the lumen.

Abstract: An apparatus and methods for tracking administering of medication by syringes is provided. The apparatus may include a plunger head for a syringe. The plunger head may include a transducer that sends and receives ultrasonic signals. The plunger may also include an antenna and a microcontroller that interfaces with the transducer and the antenna. The plunger may also include a power source that powers the microcontroller and the transducer. The transducer, the antenna, the microcontroller, and the power source may be at least partially encapsulated in an elastomer housing that fits within a barrel of the syringe. The microcontroller may be programmed with instructions to calculate data representative of the quantity of medication dispensed from the barrel and transmit the data to a remote device via the antenna.

Abstract: A medication injection device including a plunger, a temperature sensor, an antenna, and a controller is described herein. The plunger is configured to dispense medication. The temperature sensor is to measure a temperature representative of an ambient temperature of the medication injection device. The antenna is to pair the medication injection device with a remote device. The controller includes logic that when executed causes the medication injection device to perform operations, including placing the medication injection device into a low-power sleep mode, measuring the temperature with the temperature sensor at a regular interval while the medication injection in the low-power sleep mode, detecting a temperature change with the temperature sensor while in the low-power sleep mode, transitioning the medication injection device into an initialization mode in response, and pairing the medication injection device with the remote device using the antenna while in the initialization mode.

Abstract: Devices for micro-fluid mixing micro-fluids are presented, together with example methods for micro-mixing using example devices. An example device may include a micro-volume fluid chamber (?VFC), a micro-volume mixing chamber (?VMC), and a source of a target micro fluid. The ?VFC may include two slidably-mounted piston segments that divide the ?VFC into three sub-volumes, one of which initially contains a mixer micro-fluid. The source of the target micro fluid may be triggered to deliver the target micro-fluid into another of the sub-volumes via an inlet channel. A propellant may be triggered to drive axial motion of the piston segments, causing the sub-volumes to compress. Through this action, the mixer micro-fluid may be expelled via a first outlet channel into the ?VMC, and the target micro-fluid may be expelled via a second outlet channel into the ?VMC. As the piston segments move, they block and unblock the inlet and outlet channels.

Abstract: Devices are provided to automatically inject drugs or other payloads into or beneath skin. These devices include an injector configured to drive a hollow needle into the skin and subsequently to deliver the payload through the hollow needle. Applied suction acts to draw blood from the puncture formed in the skin through the hollow needle, into the device, and to a sensor, blood storage element, or other payload. In some examples, the blood is drawn through the hollow needle when the hollow needle is penetrating the skin. In some examples, these devices are additionally configured to retract the hollow needle from the skin and/or to perform some other functions. These devices can be wearable and configured to automatically access blood or deliver a payload into skin, for example, to operate at one or more points in time while a wearer of a device is sleeping.

Abstract: Devices are provided to automatically inject drugs or other payloads into or beneath skin. These devices include an injector configured to drive a hollow needle into the skin and subsequently to deliver the payload through the hollow needle. Applied suction acts to draw blood from the puncture formed in the skin through the hollow needle, into the device, and to a sensor, blood storage element, or other payload. In some examples, the blood is drawn through the hollow needle when the hollow needle is penetrating the skin. In some examples, these devices are additionally configured to retract the hollow needle from the skin and/or to perform some other functions. These devices can be wearable and configured to automatically access blood or deliver a payload into skin, for example, to operate at one or more points in time while a wearer of a device is sleeping.

Abstract: A medication injection device includes a barrel and a plunger disposed to dispense a fluid from the barrel. A dosage tracking system is coupled to output data indicative of the fluid dispensed. A controller is disposed within the medication injection device and coupled to receive the data from the dosage tracking system. The controller includes logic that when executed by the controller causes the controller to perform operations including determining, based on the data, whether an air shot event occurred while dispensing the fluid.

Abstract: Compact devices are provided to measure hematocrit of a blood sample. These devices include first and second chambers that receive respective portions of a blood sample via respective filters. The material of the filters prevents passage of red blood cells while permitting passage of blood plasma. One of the filters has one or more holes to permit the passage of whole blood. Thus, when an example device is presented with a sample of blood, one of the chambers contains whole blood and the other contains blood from which the red blood cells have been filtered. Electrodes in each of the chambers can then be used to detect the impedances of the whole blood and the filtered blood, and the detected impedances can be used to determine a hematocrit of the sample of blood.

Abstract: A method of manufacturing a plunger head for a medication injection device includes assembling at least a portion of a first component, assembling at least a portion of a second component, and assembling the first component into a cavity of the second component. The first component has a distal end and a proximal end, the distal end being configured for insertion into a barrel of the medication injection device before the proximal end, and the first component houses at least one electronic component. The second component is configured to at least partially surround the first component and to separate the first component from a medication contained within the barrel of the medication injection device.

Abstract: Various apparatuses and methods for tracking the administration of medication by medication injection devices are provided. A plunger head for a medication injection device may include a first component that houses electronic components and a second component that couples to the first component to form the plunger head. When the plunger head is installed within a barrel of the medication injection device the second component may separate the first component from medication contained within the barrel.

Abstract: A medication injection device includes a plunger head having an elastomer housing that fits within a barrel. The plunger head includes an ultrasonic transducer that sends and receives ultrasonic signals in the form of ultrasonic waves, an antenna, a microcontroller that interfaces with the ultrasonic transducer and the antenna, and a power source that powers the microcontroller and the ultrasonic transducer. The ultrasonic transducer, the antenna, the microcontroller, and the power source may be at least partially encapsulated in the elastomer housing. The microcontroller may be programmed to measure echo times of the ultrasonic waves, compare consecutive echo times, and apply a compensation factor. The microcontroller may also be programmed to calculate a volume of medication dispensed from the barrel.

Abstract: Systems and methods for generating an input to a computing device based, at least in part, on movement data generated by one or more ultrasonic transducers are described herein. An example system may include at least one ultrasonic transducer configured to be mounted to a body surface that is proximate to at least one subsurface tendon, and a controller operably coupled to the at least one ultrasonic transducer. When mounted to a body surface, the at least one ultrasonic transducer is configured to detect movement of the at least one subsurface tendon. The controller is configured to operate the at least one ultrasonic transducer to generate movement data based on detected movement of the at least one subsurface tendon, and generate an input to a computing device based, at least in part, on the generated movement data.

Abstract: An apparatus and methods for tracking administering of medication by syringes is provided. The apparatus may include a plunger head for a syringe. The plunger head may include a transducer that sends and receives ultrasonic signals. The plunger may also include an antenna and a microcontroller that interfaces with the transducer and the antenna. The plunger may also include a power source that powers the microcontroller and the transducer. The transducer, the antenna, the microcontroller, and the power source may be at least partially encapsulated in an elastomer housing that fits within a barrel of the syringe. The microcontroller may be programmed with instructions to calculate data representative of the quantity of medication dispensed from the barrel and transmit the data to a remote device via the antenna.

Abstract: Methods and systems are disclosed relating to a lens system that allows for simultaneous focus of near and far-away images with one pair of glasses, heads-up-displays (HUDs), and the like, without the need to move the user's eyes. This lens system may be used in a HUD application, for example, where the user may focus on a display lens that may be approximately one inch from the eye to view computer-generated information such as altitude, temperature, directions, and the like, and simultaneously view the individual's surroundings. The lens system may include a liquid lens that when modulated may vary from a near-focus state to a far-focus state rapidly by using an electrowetting or piezoelectric hydraulic actuator. This variable rate lens may be multiplexed at a rate that allows both near and far-away images to appear in focus simultaneously through the advantageous use of a user's persistence of vision.

Abstract: A medication injection device includes a plunger head having an elastomer housing that fits within a barrel. The plunger head includes an ultrasonic transducer that sends and receives ultrasonic signals in the form of ultrasonic waves, an antenna, a microcontroller that interfaces with the ultrasonic transducer and the antenna, and a power source that powers the microcontroller and the ultrasonic transducer. The ultrasonic transducer, the antenna, the microcontroller, and the power source may be at least partially encapsulated in the elastomer housing. The microcontroller may be programmed to measure echo times of the ultrasonic waves, compare consecutive echo times, and apply a compensation factor. The microcontroller may also be programmed to calculate a volume of medication dispensed from the barrel.

Abstract: Devices are provided to automatically access blood from beneath or within skin. These devices include an injector configured to drive a needle into the skin and subsequently to retract the needle from the skin. These devices additionally include a seal to which suction is applied. To drive the needle into the skin, the needle is first driven through the seal, creating at least one hole in the seal. The suction applied to the seal acts to draw blood from the puncture formed in the skin by the needle, through the at least one hole in the seal, and to a sensor, blood storage element, or other payload. These devices can be wearable and configured to automatically access blood from skin, for example, to access blood from the skin at one or more points in time while a wearer of a device is sleeping.

Abstract: An apparatus and methods for tracking administering of medication by syringes is provided. The apparatus may include a plunger head for a syringe. The plunger head may include a transducer that sends and receives ultrasonic signals. The plunger may also include an antenna and a microcontroller that interfaces with the transducer and the antenna. The plunger may also include a power source that powers the microcontroller and the transducer. The transducer, the antenna, the microcontroller, and the power source may be at least partially encapsulated in an elastomer housing that fits within a barrel of the syringe. The microcontroller may be programmed with instructions to calculate data representative of the quantity of medication dispensed from the barrel and transmit the data to a remote device via the antenna.

Abstract: Devices are provided to automatically access blood from beneath or within skin. These devices include an injector configured to drive a needle into the skin and subsequently to retract the needle from the skin. These devices additionally include a seal to which suction is applied. To drive the needle into the skin, the needle is first driven through the seal, creating at least one hole in the seal. The suction applied to the seal acts to draw blood from the puncture formed in the skin by the needle, through the at least one hole in the seal, and to a sensor, blood storage element, or other payload. These devices can be wearable and configured to automatically access blood from skin, for example, to access blood from the skin at one or more points in time while a wearer of a device is sleeping.