Abstract: Disclosed herein is an immersive distraction apparatus including an attachment portion including an engagement element and a front plate having two cut outs fitting lenses therein and a base portion coupled with the attachment portion having a display aperture sized to receive a device. The immersive distraction apparatus mountable on a surgical head frame using one or more connectors such that an immersive distraction therapy can be provided to a patient undergoing surgery via a virtual reality environment.

Abstract: Disclosed herein is an endotracheal tube cuff having a first layer, a second layer, and one or more sensors in a space between the first and second layers. The one or more sensors are operable to measure pressure between the endotracheal tube cuff and a tracheal wall of a patient. Also disclosed herein are methods of detecting a leak and preventing ischemia using the endotracheal tube cuff.

Abstract: Disclosed herein are systems and methods for non-invasively predicting a hemodynamic state and/or an anesthetic depth of a patient, such as a pediatric patient. The method may include receiving a peripheral venous pressure (PVP) waveform from the patient, cleaning the PVP waveform, transforming the PVP waveform into the frequency domain, and automatically predicting the hemodynamic state and/or the anesthetic depth of the patient.

Abstract: A method of detecting at least a blockage status in a porous member separating a measurement chamber of a device including a gas sensor positioned within the measurement chamber which is responsive to an analyte in an ambient environment to be sampled, includes emitting pressure waves from a pressure wave source which travel within the measurement chamber, measuring a first response via a first sensor responsive to pressure waves positioned at a first position within the measurement chamber, measuring a second response via a second sensor at a second position, different from the first position, and in fluid connection with the pressure wave source, determining the blockage status of the porous member based upon a functional relation of the first response and the second response.

Abstract: A system includes a two-conductor loop in which the loop current or current signal is controlled by a loop current controller to be proportional to a signal output from a sensor. The system further includes energy harvesting circuity in electrical connection with the two-conductor loop which includes a second current controller in parallel electrical connection with the loop current controller and a power converter in electrical connection with the second current controller. The second current controls a portion of current drawn from the two-conductor loop and delivered to the power converter from an output port thereof. The portion of the current drawn from the two-conductor loop is returned to the loop current controller from the energy harvesting circuit. Noise in the portion of the current drawn from the two-conductor loop by the second current controller is controlled by the second current controller to be below a predetermined threshold.

Abstract: A method of detecting at least a blockage status in a porous member separating a measurement chamber of a device including a gas sensor positioned within the measurement chamber which is responsive to an analyte in an ambient environment to be sampled, includes emitting pressure waves from a pressure wave source which travel within the measurement chamber, measuring a first response via a first sensor responsive to pressure waves positioned at a first position within the measurement chamber, measuring a second response via a second sensor at a second position, different from the first position, and in fluid connection with the pressure wave source, determining the blockage status of the porous member based upon a functional relation of the first response and the second response.

Abstract: Disclosed herein is an immersive distraction apparatus including an attachment portion including an engagement element and a front plate having two cut outs fitting lenses therein and a base portion coupled with the attachment portion having a display aperture sized to receive a device. The immersive distraction apparatus mountable on a surgical head frame using one or more connectors such that an immersive distraction therapy can be provided to a patient undergoing surgery via a virtual reality environment.

Abstract: A system includes a two-conductor loop in which the loop current or current signal is controlled by a loop current controller to be proportional to a signal output from a sensor. The system further includes energy harvesting circuity in electrical connection with the two-conductor loop which includes a second current controller in parallel electrical connection with the loop current controller and a power converter in electrical connection with the second current controller. The second current controls a portion of current drawn from the two-conductor loop and delivered to the power converter from an output port thereof. The portion of the current drawn from the two-conductor loop is returned to the loop current controller from the energy harvesting circuit. Noise in the portion of the current drawn from the two-conductor loop by the second current controller is controlled by the second current controller to be below a predetermined threshold.

Abstract: A system includes a two-conductor loop in which the loop current or current signal is controlled by a loop current controller to be proportional to a signal output from a sensor. The system further includes energy harvesting circuitry in electrical connection with the two-conductor loop which includes a second current controller in parallel electrical connection with the loop current controller and a power converter in electrical connection with the second current controller. The second current controls a portion of current drawn from the two-conductor loop and delivered to the power converter from an output port thereof. The portion of the current drawn from the two-conductor loop is returned to the loop current controller from the energy harvesting circuit. Noise in the portion of the current drawn from the two-conductor loop by the second current controller is controlled by the second current controller to be below a predetermined threshold.

Abstract: A gas sensor device including a housing, a porous member through which the analyte gas is transportable in operative connection with the a of the housing to separate an inner chamber of the housing from the ambient environment, a gas sensor responsive to the analyte gas within the inner chamber, a source of pressure waves positioned within the inner chamber and spaced from the porous member so that any pressure waves emitted from the source of pressure waves that are transmitted out of the inner chamber are transmitted through the porous member, a sensor responsive to pressure waves, and circuitry in operative connection with the sensor responsive to pressure waves to relate a phase of a measured response of the sensor responsive to pressure waves to a state of blockage in the porous member.

Abstract: A gas sensor device to detect an analyte gas in an ambient environment includes a housing including an inner chamber and a port, a porous member through which the analyte gas transports in operative connection with the port to separate the inner chamber from the ambient environment, a sensor responsive to the analyte positioned within the inner chamber, a source of pressure waves positioned within the inner chamber, a sensor responsive to pressure waves positioned within the inner chamber; and circuitry in operative connection with the sensor responsive to pressure waves to relate a response of the sensor responsive to pressure waves to a state of blockage in the porous member.

Abstract: A method of detecting at least a blockage status in a porous member separating a measurement chamber of a device including a gas sensor positioned within the measurement chamber which is responsive to an analyte in an ambient environment to be sampled, includes emitting pressure waves from a pressure wave source which travel within the measurement chamber, measuring a first response via a first sensor responsive to pressure waves positioned at a first position within the measurement chamber, measuring a second response via a second sensor at a second position, different from the first position, and in fluid connection with the pressure wave source, determining the blockage status of the porous member based upon a functional relation of the first response and the second response.

Abstract: A method of detecting at least a partial blockage in a porous member separating an inner chamber of a device having a gas sensor responsive to an analyte positioned within the inner chamber and an ambient environment includes emitting pressure waves within the inner chamber and measuring a change in phase of a response via a sensor responsive to pressure waves.

Abstract: A method of detecting at least a partial blockage in a porous member separating an inner chamber of a device having a gas sensor responsive to an analyte positioned within the inner chamber and an ambient environment includes emitting pressure waves within the inner chamber and measuring a response via a sensor responsive to pressure waves positioned within the inner chamber.

Abstract: One aspect of the present disclosure is a system for hemodynamic resuscitation. The system includes an intravenous access device having a pressure sensor element configured to detect a peripheral venous pressure value in response to an occlusion of a peripheral vein. The system also includes a controller device that is configured to receive a signal from the pressure sensor comprising the peripheral venous pressure value, to process the signal to determine a hemodynamic parameter based on the peripheral venous pressure value, and to generate a resuscitation score based on the hemodynamic parameter.

Abstract: A system includes a two-conductor loop in which the loop current or current signal is controlled by a loop current controller to be proportional to a signal output from a sensor. The system further includes energy harvesting circuitry in electrical connection with the two-conductor loop which includes a second current controller in parallel electrical connection with the loop current controller and a power converter in electrical connection with the second current controller. The second current controls a portion of current drawn from the two-conductor loop and delivered to the power converter from an output port thereof. The portion of the current drawn from the two-conductor loop is returned to the loop current controller from the energy harvesting circuit. Noise in the portion of the current drawn from the two-conductor loop by the second current controller is controlled by the second current controller to be below a predetermined threshold.

Abstract: A method of measuring peripheral venous pressure includes providing a tubing operably connected between a fluid source and a vein, a fluid controlling device for occluding the tubing and configured to have an on position and an off position, and at least one pressure sensor in fluid communication with the tubing, placed between the fluid controlling device and the vein; selectively passing fluid from the fluid source to the vein, through the tubing, by the fluid controlling device; measuring both a fluid pressure from the fluid source and a distal venous pressure from the vein by the at least one pressure sensor when the fluid controlling device is in the on position; and measuring the distal venous pressure from the vein only by the at least one pressure sensor when the fluid controlling device is in the off position.

Abstract: In one aspect, an apparatus for measuring peripheral venous pressure includes a tubing having two ends with one end connectable to a fluid source and the other end connectable to a vein, a fluid controlling device configured to have an on position and an off position, and at least one pressure sensor configured to measure fluid pressures therein. When the fluid controlling device is in the on position, fluid flow in the tubing is allowed to pass through the fluid controlling device, such that the at least one pressure sensor measures both a fluid pressure from the fluid source and a distal venous pressure from the vein. When the fluid controlling device is in the off position, no fluid flow in the tubing is allowed to pass through the fluid controlling device, such that the at least one pressure sensor measures the distal venous pressure from the vein only.

Abstract: A method of detecting at least a partial blockage in a porous member separating an inner chamber of a device having a gas sensor responsive to an analyte positioned within the inner chamber and an ambient environment includes emitting pressure waves within the inner chamber and measuring a change in phase of a response via a sensor responsive to pressure waves.

Abstract: A method of detecting at least a partial blockage in a porous member separating an inner chamber of a device having a gas sensor responsive to an analyte positioned within the inner chamber and an ambient environment includes emitting pressure waves within the inner chamber and measuring a response via a sensor responsive to pressure waves positioned within the inner chamber.