Abstract: The present disclosure relates generally to a system and method for determining the refractive error of a person, more particularly determining the person's refractive error by using a computerized screen, and providing the person with a prescription for the person's preferred type of corrective lenses. The system and method do not require the trip or expense of a doctor visit, and are optimized for convenience and cost effectiveness. In a general embodiment, the present disclosure provides a method for determining a corrective lenses prescription for a person. The method includes, separately, for each eye of the person, determining the sphere prescription for the person via a computerized screen and without the use of a refractor lens assembly. Determining the sphere prescription is done, in part, by displaying a sphere figure to the person via the computerized screen and enabling the person to select at least one input, where the input corresponds to a sphere measurement.

Abstract: An optical tomography device is an optical tomography device that includes a first light source; and an optical device configured to guide first light from the first light source to a measurement target eye and detect interference light obtained from reflected light from the measurement target eye. The optical tomography device further includes: a second light source configured to emit aiming light indicative of a position to which the first light is applied; and an optical probe having an opening at a distal end and configured capable of being inserted in an eyeball. The optical probe applies the first light, into the measurement target eye through the opening, guides the reflected light to the optical device, and applies, through the opening, the aiming light to the position to which the first light is applied.

Abstract: Eye prescriptions may be determined by providing a simple, easy to use, portable device with a specially configured targeting light source that aligns the eye, mitigates accommodation, and provides accurate results. Unlike stationary, closed view autorefractors, this device typically is portable, self-usable, relatively inexpensive, enabling more widespread use across the world.

Abstract: Embodiments of this invention generally relate to systems and methods for wavefront interactive refraction display and more particularly to systems and methods for capturing and displaying eye wavefront interactive refraction data based on the desired refractive state of the patient's eye.

Abstract: An ophthalmic apparatus which photographs an endothelial cell and measures a coat thickness of a cornea of an eye to be examined in a non-contact manner; comprising an image pickup unit (19) for photographing a corneal endothelium of the eye to be examined, a control unit (49) for detecting a cell wall of the endothelial cell from a corneal endothelial image photographed by the image pickup unit and for performing an image processing of hatching the cell wall with a boundary line, a display unit (54) for displaying an analytical image in which the cell wall hatched with the boundary line, and an operation unit (55), wherein the control unit changes the shading of the boundary line based on an input from the operation unit.

Abstract: In a method for registering measurement points on a body, in particular on an eye, measurement points are registered along a trajectory on a surface of the body, in particular a curved surface of the body, for determining an axial length profile, by way of a measurement beam. Here, a minimum radius of curvature of the trajectory is at least 1/7, preferably at least ?, particularly preferably at least ? of a radius of a circumference of the surface.

Abstract: Eye prescriptions may be determined by providing a simple, easy to use, portable device with a specially configured targeting light source that aligns the eye, mitigates accommodation, and provides accurate results. Unlike stationary, closed view autorefractors, this device typically is portable, self-usable, relatively inexpensive, enabling more widespread use across the world.

Abstract: The present disclosure relates generally to a system and method for determining the pupillary distance of a person, more particularly determining the person's pupillary distance by using a computerized screen. The system and method do not require the trip or expense of a doctor or store visit, and are optimized for convenience and cost effectiveness. In a general embodiment, the present disclosure provides a method for determining a pupillary distance of a person without physically measuring the pupillary distance with a device. The method includes receiving a front facial image of the person, determining a scale of the image based on an estimated canthal distance, and determining the pupillary distance of the person based, in part, on the determined scale of the image.

Abstract: Systems and methods are provided for post-hoc correction of calibration errors in eye tracking data, which take into consideration calibration errors that result from changes in user position during a user session in which the user's fixations on a display screen are captured and recorded by an eye tracking system, and which take into consideration errors that occur when the user looks away from a displayed target item before selecting the target item.

Abstract: An ophthalmoscope comprises an illumination element providing an illumination light beam to illuminate the fundus of an eyeball; an imaging lens group converging the reflected light beam from the fundus; and an image capture module. The image capture module includes an image sensing element, a fixation light element and an optical element. The image sensing element captures the reflected light beam converged by the imaging lens group to form an image. The fixation light element provides a fixation light beam passing through the imaging lens group and reaching the fundus. The optical element is arranged among the imaging lens group, image sensing element and fixation light element to make the image sensing element and the fixation light element on different equivalent focal planes of the imaging lens group. According to the above-mentioned structure, a relay lens and a focusing module used by the conventional fixation light element is omitted.

Abstract: Apparatus for illuminating the retina of an eye. The apparatus includes an illumination device and a lens system. The illumination device and the lens system combine to provide incident illumination from an apparent point source located within the lens system. The apparatus also includes an illumination transfer device. The illumination transfer device has two foci and the apparent point source of the lens system is provided at a first focus point of the illumination transfer device and an eye is accommodated at a second focus point of the illumination transfer device. The illumination transfer device transfers the incident illumination from the apparent point source into the eye to illuminate the retina.

Abstract: Devices, methods, and systems for transmitting, via USSD messages, blood glucose readings from a glucometer over a GSM network to a database storing blood glucose readings. The database is configured to transmit electronic messages including the blood glucose readings received from the glucometer to one or more personal electronic devices of one or more predetermined recipients.

Abstract: Embodiments are directed to a computing system that operates at least partially through a medium, which may be a human. The computing system includes a first acoustic computing element implanted in the human. The first acoustic computing element receives input acoustic vibration. The first acoustic computing element converts a first portion of the input acoustic vibration to energy that powers an operation of the first acoustic computing element. The first acoustic computing element converts a second portion of the input acoustic vibration to stored energy of the first acoustic computing element. The first acoustic computing element converts a third portion of the input acoustic vibration to a first input data that is processed by the first acoustic computing element. The first acoustic computing element generates and transmits a first output acoustic vibration based on the first input data.

Abstract: Systems, methods, and apparatus are described herein for obtaining medical diagnostic measurements from implanted sensors. In various embodiments, a spinal implant-monitoring apparatus may include: a bridge defining a first hermetically-sealed interior and two or more legs; one or more strain gauges contained within the first hermetically-sealed interior of the bridge to provide a signal indicative of strain measured between the legs of the bridge; a housing defining a second hermetically-sealed interior, the housing mounted on a surface of the bridge; and control circuitry contained within the second hermetically-sealed interior. The control circuitry may be in communication with the one or more strain gauges and may be configured to convert the signal into digital data representative of the signal. Methods of using such apparatus are also disclosed.

Abstract: A method for providing an image of a subject in a magnetic resonance imaging MRI system with parallel transmission (pTx) is provided. A localizer scan of the subject is provided. Body anatomy is determined from the localizer scan. The body anatomy is matched with at least one body model of a plurality of body models. B1+ and Bo maps are calculated from the body anatomy. The electric fields from the at least one body model and constraints are used to simultaneously determine a plurality of excitation pulses for a pTx. MRI is performed on the subject using the determined excitation pulses. Global SAR is monitored in real time to ensure all time-averaged constraints are satisfied simultaneously.

Abstract: A spring type firing mechanism applied to an endoscope accessory includes a housing, a cap, a bottom cover, a driving module, a buffering module and a spring pipeline, and the spring pipeline includes a push-rod coupled to the sensor, and the driving module includes a firing spring and a restoring spring, and the two springs have different rigidities so as to form a reciprocating structure of the firing mechanism. After the sensor of the firing mechanism is triggered, the resilience of the restoring spring compresses the firing spring back to its firing length, so as to restore its position by a single driving point and allow users to complete the firing operation by one hand and simplify the operation of doctors to improve convenience and efficiency.

Abstract: A needle device includes a shell, a needle unit and an actuator. The needle unit includes an outer needle guide and a needle member. The outer needle guide has a piercing end for penetrating into a biological body part. The needle member is disposed in the shell and the outer needle guide, has a needle tip protruding from a front end of the shell and is movable relative to the shell and the outer needle guide. The actuator is responsive to a control signal to drive the needle member and move the needle tip between a protruding position, where the needle tip protrudes out of the piercing end of the outer needle guide, and a retracting position, where the needle tip is retracted back into the outer needle guide.

Abstract: A system for measuring skin hydration at a measurement site with a independent measurement probe and a portable data processing system. Wireless communications enable the transfer of commands and data between the probe and portable data processing system. The portable data processing system can comprise a wireless tablet or smartphone. The portable data processing system provides input functions and output functions on its display and includes a camera for imaging the measurement site.

Abstract: A system and method is disclosed for non-contact detection and/or imaging and/or monitoring target subsurface tissue of at least one of human or animal anatomy. The system applies a first optical excitation signal to an outer tissue surface at a first location on the anatomy, which excites the target subsurface tissue to produce acoustic signals which are transmitted to an outer tissue surface of the anatomy. A gel-like, impedance matching and signal converting (IMASC) material layer is applied to the outer tissue surface at a second location on the anatomy. The IMASC material layer contains material elements which are able to influence characteristics of an optical signal impinging and reflected from the IMASC material, in accordance with acoustic signals that have been reflected from the target subsurface tissue, and which propagate into the IMASC material.

Abstract: A probe includes a plurality of element groups, the element group including a first element and a plurality of second elements which are arranged in a first direction, the plurality of element groups being arranged in a second direction intersecting with the first direction. An acoustic lens having a curvature in the first direction is arranged on the first element. When transmission and reception based on a pulse echo technique are performed, the transmission and reception are performed with respect to the subject by using only the first element, and when reception of a photoacoustic wave is performed, the reception from the subject is performed by using the entire element group constituted by the first element and the plurality of second elements.

Abstract: A method includes receiving cardiac data and determining a cardiac index based upon the cardiac data; determining an increased risk of death associated with epilepsy if the indices are extreme, issuing a warning of the increased risk of death and logging information related to the increased risk of death. A second method comprises receiving at least one of arousal data, responsiveness data or awareness data and determining an arousal index, a responsiveness index or an awareness index, where the indices are based on arousal data, responsiveness data or awareness data respectively; determining an increased risk of death related to epilepsy if indices are extreme values, issuing a warning of the increased risk of death and logging information related to the increased risk of death. A non-transitory computer readable program storage device encoded with instructions that, when executed by a computer, perform a method is also provided.

Abstract: An active medical device is configured to receive inputs and to calculate a hemodynamic parameter representative of myocardium contractility determined from an endocardial acceleration signal. The microcontroller acquires heart rate and hemodynamic parameter pairs of values during a plurality of cardiac cycles. The microcontroller is configured to distribute the pairs of values into discrete bins to develop a profile for analysis. The microcontroller is configured to conduct an analysis comprising calculating an index representative of the patient's clinical status. The hemodynamic parameter representative of the myocardial contractility is a time interval separating the first and the second peak of endocardial acceleration.

Abstract: The method of determining systolic and diastolic blood pressure where the set of received data of each curve of the plethysmographic curve gained from the unit for monitoring the life functions in a shape of the ring and/or the earring is divided into individual segments that respond to one heartbeat of the measured subject and after processing there are selected and recalculated segments meeting the defined criteria. The unit for monitoring and measuring the life functions comprises a supporting construction in a shape of a ring (29) and/or an earring (39).

Abstract: A system and apparatus comprising a multisensor guidewire for use in interventional cardiology, e.g. for Transcatheter Valve Therapies (TVT), comprises a plurality of optical sensors for direct measurement of cardiovascular parameters, e.g. transvalvular blood pressure gradients and flow. A conventional outer coil contains a shaped core wire having a cross-section defining helical grooves extending along its length, which accommodate optical fibers and optical sensors within a diameter Dcore of the core wire. Advantageously, the diameter and material of the core wire provides the guidewire with sufficient stiffness for use as a support guidewire for valve replacement, e.g. Transcatheter Aortic Valve Implantation (TAVI), while accommodating multiple sensors and optical fibers within a guidewire of outside diameter ?0.89 mm. An optical connector couples the guidewire to a control system.

Abstract: A measuring device includes a measuring part that performs an invasive blood pressure measurement using a transducer and detects that a blood pressure measured by the invasive blood pressure measurement becomes a predetermined abnormal state during the invasive blood pressure measurement, a detecting part that detects whether or not a zero-point calibration of the transducer is being carried out, and a notification control part that controls whether or not to output an alarm based on a detection state of the detecting part when the blood pressure becomes the predetermined abnormal state.

Abstract: A carrier assembly includes a sub-assembly including a pump, at least one solenoid valve, and a check valve. The pump, the at least one solenoid valve, and the check valve are in fluid communication with each other and with at least one pressure transducer via a manifold. Also, the carrier assembly is configured to be mounted to a medical device's main assembly board.

Abstract: What is provided is a system, method, and article of manufacture for detecting, monitoring, and tracking whether a user is in a more relaxed or stressed state by measuring the user's heart rate variability. The system has a heart rate monitoring device with at least one sensor that is configured to measure user heart rate. The system also has a mobile computing device, which may be configured to interact with the heart rate monitoring device for monitoring, tracking, and displaying a user's heart rate and mental stress level information. The method measures the user's heart rate information to calculate a measure of heart rate variability and to analyze whether peaks corresponding to activation levels of the user's parasympathetic nervous system (PNS) and sympathetic nervous system (SNS) exceed a predetermined threshold level within a predetermined time period.

Abstract: According to an aspect, there is provided a method for measuring the intracranial pressure, ICP, in a subject, the method comprising detecting whether spontaneous retinal venous pulsations, SRVPs, are occurring in an eye of the subject as the orientation of the head of the subject changes; identifying the orientation of the head of the subject at which SRVPs start to occur or stop occurring; and using the identified orientation of the head of the subject at which SRVPs start to occur or stop occurring to determine the ICP in the subject.

Abstract: A probe suitable for deep-brain recording and stimulation is provided. The probe comprises a wire bundle that includes a plurality of wires, an integrated circuit having a plurality of electrodes, and an interposer that joins the wire bundle and the integrated circuit such that each of the plurality of electrodes is electrically connected with a different wire of the plurality of wires.

Abstract: A nervous system interface device can include a flexible active layer, a power coil, a communication module, and an antenna. More specifically, the flexible active layer can included a plurality of electrodes that are positioned to take neural measurements of the nervous system. The power coil can be electrically coupled to the flexible active layer and can be configured to receive wireless power from a power transfer device. The communication module can be electrically coupled to the flexible active layer and can be configured to receive power from the power coil. The antenna can also be adapted to wirelessly communicate neural measurement information to another device (e.g. an external computing device, receiver or the like). The nervous system interface device has two functional configurations which include a rolled and an unrolled configuration. In the rolled configuration the nervous system electrode device is rolled along a longitudinal axis for insertion into a hypodermic needle.

Abstract: A measurement device includes a housing, an electronic unit included in the housing and configured to measure a biological state of a subject, and an electrode to be placed on the subject for measuring the biological state. The electrode is embedded in the housing and has a surface that is exposed through an opening in the housing.

Abstract: A measurement system of respiration-related signals includes a plurality of electrodes, an ECG processing device, and an analysis device. The ECG processing device acquires a first analog differential signal and a second analog differential signal through the electrodes and generates a Lead-I ECG signal and a Lead-II ECG signal which is orthogonal to the Lead-I ECG signal after processing the two analog differential signals. The analysis device executes a trigonometric function to calculate angle change values of a cardiac axis based on the acquired Lead-I ECG signal and the Lead-II ECG signal, and further generate a cardiac axis angle change waveform according to the continuous angle change values. Accordingly, the cardiac axis angle change waveform is suitable for the prediction of respiratory conditions of the participant because of the high positive correlation between the frequency of the cardiac axis angle change waveform and the human respiratory frequency.

Abstract: According to some aspects a system is provided comprising a low-field magnetic resonance (MR) device, at least one electrophysiological device, and at least one controller configured to operate the low-field MR device to obtain MR data and to operate the at least one electrophysiological device to obtain electrophysiological data.

Abstract: Disclosed is a method and system for selection of Electroencephalography (EEG) channels valid for determining cognitive load of subject. According to one embodiment, EEG signals are obtained from EEG channels associated with subject performing cognitive tasks are received. Time-frequency features of EEG signals are extracted for a frequency band comprise maximum energy value, minimum energy value, average energy value, maximum frequency value, minimum frequency value, and average frequency value. Weight of an EEG channel associated with time-frequency feature is derived using statistical learning technique. Binary values for EEG channels corresponding to time-frequency feature are assigned using weight of EEG channel associated with time-frequency feature.

Abstract: A seamless, smart fetal monitoring garment and methods of using thereof. The system includes a knitted or interwoven garment having a multiplicity of conductive textile electrodes for sensing maternal and fetal electrical vital signals. The maternal and fetal electrical vital signals are selected from a group including maternal heart rate, fetal heart rate and electromyogram (EMG) activities including uterine activities. The method includes wearing the garment, acquiring electrical mixed common, maternal and fetal vital signals from surface region of a pregnant woman, using the plurality of textile electrodes, optimally weighted summing-up the acquired signals, analyzing the summed-up signals to thereby extract the maternal signal and the fetal signal, including determining their heart rates, and including detecting health hazards and in some embodiments, including detecting a uterine contraction sequence suggesting the need to be hospitalized for birth giving.

Abstract: A system for detecting cardiac events and alerting the patient of the cardiac event issued by an implanted medical device. A processor detects a cardiac event and issues an activation signal to a patient alerting mechanism which emits an alarm during a first time interval followed by an alarm-off period of time. Reminder alarms are issued periodically following the alarm-off period of time. Reminder alarms are issued during reminder on-periods of time which are shorter than the first time interval. The alarm-off period and the time between periodic reminder alarms are greater than the alarm first time interval. A disabling device permits disabling of reminder alarms.

Abstract: A system is disclosed including: one or more electroencephalography (EEG) sensor nodes in a fully reconfigurable sensor network configured to detect electrical signals indicating activity of a brain of a subject and to transmit signal information relating to the detected electrical signals, each EEG sensor node embodying an analog front end (AFE) circuit, and a centralized command control node (CCN) in the sensor network in communication with the one or more EEG sensor nodes and configured to receive the transmitted signal information from the one or more EEG sensor nodes and to perform a processing technique on the received information resulting in processed signal data, wherein the one or more EEG sensor nodes are configured to detect the electrical signals without a driven right leg (DRL) circuit in the sensor network.

Abstract: A thin planar biological sensor is provided, comprising at least one flexible electrode used for contacting a subject's skin and measuring biological signal. The flexible electrode is made of silicon-silver-based material, in which a ratio of silicon to silver-compound is about 7:3. A conductive plate is coupled to the flexible electrode. A buffer layer covers the conductive plate and the flexible electrode. A printed circuit board is used to receive the measured biological signal. By employing the novel proposed biological sensor, it is advantageous of measuring biological signals not only EEG signals but also ECG and EMG signals. Besides being thin, planar, flexible and non-allergy attributing a low cost to the proper fabrications makes the proposed sensor characterized with a potential for becoming an important tool of medical measurement.

Abstract: A measurement device comprising includes a housing, an electronic unit included in the housing and configured to measure a biological state of a subject, and first and second electrodes disposed on a surface of the housing and are aligned along a first direction that is not orthogonal to one of first and second adjacent edges of the housing.

Abstract: A nerve stimulating device with an adjustable length is shown and described. The device includes a handle and an elongated shaft with a stimulating electrode. The stimulating electrode can be selectively positioned to a plurality of distances relative to the handle. The device allows nerves in nerve regions at multiple positions relative to the surface of the patient's body to be stimulated with a single device.

Abstract: The present invention provides a medical electrode comprising a conductive metal base comprising a plate element and a boss formed on the plate element and a conductive support cylinder separate from the conductive metal base. The conductive support cylinder is rotatably mounted to the conductive metal base while remaining in electrical communication with said conductive metal base. The present invention also provides a limb clamp for an ECG device. According to the present invention, it is possible to prevent bending of the cable connecting with the medical electrode, thereby avoiding cable failure.

Abstract: Disclosed are various embodiments for estimating the flow of blood through a blood vessel in a region of interest. Passage of a bolus of fluid through an imaged blood vessel over a period of time is tracked by a computing device. The computing device fits the tracked passage of the bolus of fluid to a modeled passage of the bolus of fluid. The computing device then estimates a volume of blood flow through the imaged blood vessel based at least in part on a fit of the tracked passage of the bolus of fluid to the modeled passage of the bolus of fluid.

Abstract: A tissue identification device for determining the presence and borders of the cancerous tissues includes a measurement probe having a concentric, 2 port coaxial structure and enabling the 1 Port and 2 Port scattering parameters of the target tissue to be measured. An S parameter measurement unit is associated with the measurement probe via an RF/Microwave cable and allows the S parameters of the tissue to be measured. A computer identifies the tissue by means of an application software block and a tissue identification software block therein in line with the measurement results from the S parameter measurement unit. A hand tool carrying the measurement probe thereon during the measurement process operates simultaneously with the computer by being in communication therewith.

Abstract: A method of assessing a tissue ablation treatment, including positioning a medical device adjacent a target tissue; measuring a first impedance magnitude a first frequency with the medical device; measuring a first impedance phase at a second frequency with the medical device; ablating at least a portion of the target tissue with the medical device; measuring at second impedance magnitude at a third frequency with the medical device; measuring a second impedance phase at a fourth frequency with the medical device; comparing at least one of (i) the first and second impedance magnitudes and (ii) the first and second impedance phases; and providing an indication of the efficacy of the ablation treatment based at least in part on the comparison.

Abstract: Provided is a wrist-type body component measuring apparatus. The wrist-type body component measuring apparatus includes: a band configured to be worn on a wrist of a user; a first input electrode and a first output electrode disposed on an inside surface of the band and configured to be in contact with the wrist of the user; a second input electrode and a second output electrode disposed on an outside surface of the band; a measuring unit configured to apply a current to the first and second input electrodes and detect a voltage from the first and second output electrodes to measure a body impedance of the user; and an electrode converter configured to convert a disposition of the first and second input electrodes and the first and second output electrodes based on a determination of whether the band is worn on a left wrist or a right wrist of the user.

Abstract: Provided is a mobile autonomous apparatus (1) for measuring and analysing at least one parameter representing the fat of a skin surface area comprising at least one probe (10) comprising at least two pairs of electrodes intended to come into contact with the skin surface area defining a frrst pair of injecting electrodes (11, 12), and a second pair ofreceiving electrodes (13, 14) for measuring the response to the injection, an energy source (5) for producing, at the frrst pair of injecting electrodes (11, 12), a variable electrical signal with a current of intensity i included in the range [60 ?A to 4000 ?A] and a frequency included in the range [1 k Hz to 1000 kHz], a data processing and control unit (CPU) for determining the elements relative to the bio-impedance (Z) of said area and said at least one parameter representing the cellulite of the skin surface area.

Abstract: The magnetic resonance imaging apparatus includes: a calculation means for calculating the amount of absorption of electromagnetic waves into the object according to the emission of RF pulses in a part of the object or a bed position where imaging is scheduled; a means for setting imaging conditions, in which the calculated amount of absorption satisfies conditions of the specified value of the amount of absorption of electromagnetic waves, from the relationship between the calculated amount of absorption and the specified value of the amount of absorption of electromagnetic waves; and a bed control device that controls a top plate according to the set imaging conditions.

Abstract: There is provided an operating apparatus for a medical apparatus, the operating apparatus including a ring-shaped magnet magnetically polarized in a circumferential direction or a radial direction and configured to rotate along with rotating operation by a user, and a sensor unit configured to detect a magnetic field and to output a signal depending on the detected magnetic field. The sensor unit outputs two-phase signals having different phases.

Abstract: This invention relates to a breathing tube for use in ultrasonic flow measurement systems for determining the volume flow and/or the molar mass of the respiration of humans and animals. According to the invention, the breathing tube at least partly has a polygonal cross-section. Furthermore at least one indicator is formed on the breathing tube, which can be read out via an external optical device.

Abstract: The present invention discloses a method to determine the lung clearance index (LCI) or other indices of ventilation inhomogeneity of the lungs by combining two pulmonary gas exchange techniques; Inert gas rebreathing (IGR) is used for rapid wash-in of the inert tracer gas and this is followed by multiple-breath wash-out (MBW). The functional residual capacity (FRC) can either be determined from the tracer gas concentration and the gas flow inhaled and exhaled during multiple-breath wash-out or by gas analysis alone from the inert gas rebreathing. The cumulative expired volume (VCE) required to clear the inert tracer gas from the lungs is determined from the multiple-breath wash-out, and LCI is calculated as the ratio between VCE and FRC.