Abstract: The present disclosure illustrates a wearable body temperature monitoring device and a method thereof. The wearable body temperature monitoring device includes a hollow shell member and a circuit board. The hollow shell member includes a sensing surface and an outer surface opposite to each other, and the sensing surface is provided with hole. The circuit board is accommodated in the hollow shell member and includes a first side surface corresponding to the sensing surface and a second side surface corresponding to the outer surface. The circuit board is provided with a non-contact temperature sensor, a wireless transmission module, a processing unit, and a battery, and the non-contact temperature sensor is disposed at the first side surface and aligned with the hole of the sensing surface. The wearable body temperature monitoring device can respond the variation of the body temperature in real time when being attached on clothes.

Abstract: Disclosed is a wearable device. The wearable device includes an optical signal transmission unit configured to transmit optical signals, an optical signal sensing unit configured to receive reflected optical signals, a data processing unit configured to process the reflected optical signals, and a coordinate generating unit configured to generate 3-dimensional coordinate from the processed data.

Abstract: Systems and methods are disclosed that provide smart alerts to users, e.g., alerts to users about diabetic states that are only provided when it makes sense to do so, e.g., when the system can predict or estimate that the user is not already cognitively aware of their current condition, e.g., particularly where the current condition is a diabetic state warranting attention. In this way, the alert or alarm is personalized and made particularly effective for that user. Such systems and methods still alert the user when action is necessary, e.g., a bolus or temporary basal rate change, or provide a response to a missed bolus or a need for correction, but do not alert when action is unnecessary, e.g., if the user is already estimated or predicted to be cognitively aware of the diabetic state warranting attention, or if corrective action was already taken.

Abstract: A physiological monitor is provided for determining a physiological parameter of a medical patient with a multi-stage sensor assembly. The monitor includes a signal processor configured to receive a signal indicative of a physiological parameter of a medical patient from a multi-stage sensor assembly. The multi-stage sensor assembly is configured to be attached to the physiological monitor and the medical patient. The monitor of certain embodiments also includes an information element query module configured to obtain calibration information from an information element provided in a plurality of stages of the multi-stage sensor assembly. In some embodiments, the signal processor is configured to determine the physiological parameter of the medical patient based upon said signal and said calibration information.

Abstract: The fever epidemic detection system comprises a detection module, a control module and a communication module. The detection module measures and obtains a body-temperature measured value. The control module comprises a first operation unit, a determination unit and an alert unit. The first operation unit receives and calibrates the body-temperature measured value with a calibration factor, and generates a body-temperature calibrated value. The determination unit receives and determines whether the body-temperature calibrated value is within a preset normal body-temperature range and generates a determination result. The alert unit receives the determination result. The communication module transmits data to an external device. The alert unit generates a first alerting message, if the determination result shows that the body-temperature calibrated value is not within a preset normal body-temperature range.

Abstract: Systems and methods for measuring and monitoring intracavitary tissue temperature. The system may include a catheter shaft with a circuit board disposed therein, the circuit board having an array of sensors disposed thereon. The catheter shaft may have an opening and an expandable structure surrounding the opening to provide a field of view of the intracavitary tissue for the array of sensors through the opening. The system may include a software-based programming system run on a computer such that a clinician may review information indicative of temperature of the intracavitary tissue, and be alerted if the temperature exceeds a predetermined threshold.

Abstract: There is herein described light emitting medical devices and a method of manufacturing said medical devices. More particularly, there is described integrated light emitting medical devices (e.g. neural devices) capable of being used in optogenetics and a method of manufacturing said medical devices.

Abstract: The present invention discloses a capsule endoscope with specific gravity control. The capsule endoscope comprises a housing to enclose various components, an inflatable device attached to a first longitudinal end of the capsule unit and an enteric coated shell attached to the first longitudinal end of the capsule unit to enclose the inflatable device between the enteric coated shell and the capsule unit. The various components include a camera sub-system for capturing image frames. The inflatable device comprises an inflatable membrane and an effervescent formulation inside the inflatable membrane. The enteric coated shell fits tightly onto the first longitudinal end of the capsule unit to prevent body liquid from leaking into a space between the enteric coated shell and the capsule unit when the capsule unit travels in human gastrointestinal tract after being swallowed.

Abstract: Featured is a surgical instrument including a rotating cutting implement and a heat transfer mechanism configured to absorb heat energy during the use of such a rotating cutting implement. The heat transfer mechanism is configured so the absorbed heat energy is communicated to an external heat sink. Such a heat transfer mechanism includes a heat pipe, e.g., a scintered or wick type heat pipe. The heat energy is absorbed at one end of the heat pipe to minimize the potential for damage to the tissue and the like at and/or about the surgical site. Also featured are a surgical apparatus embodying such a surgical instrument and surgical or medical methods or procedures for manipulating, rotatably cutting, grinding, abrading or debriding tissue, bone or other structures or components of a mammalian body using such surgical instruments or surgical apparatus.

Abstract: Disclosed is a temperature measurement device (4) and method of using the same. The device (2) comprises a base portion (14), a plate (16), and a temperature sensor (22). The base portion (14) comprises a first surface and a second surface opposite to the first surface and spaced apart from the first surface. The base portion (14) is more thermally insulating than the plate (16). The plate (16) comprises a first surface and a second opposite to the first surface. The plate (16) is disposed on the first surface of the base portion (14) such that the second surface of the plate (16) is in contact with the first surface of the base portion (14). The temperature sensor (22) is coupled to the first surface of the plate (16) such that the temperature sensor (22) measures a temperature of the first surface of the plate (16).

Abstract: A catheter and patch electrode system is provided for use with an apparatus, such as an ablation generator, having a 4-wire interface for improved impedance measurement. The 4-wire interface includes a pair of source connectors across which an excitation signal is produced and a pair of sense connector wires across which the impedance is measured. The RF ablation generator may also produce an ablation signal across a source wire and an indifferent return patch electrode. The system further includes a cable that connects the generator to a catheter. The catheter includes a shaft having a proximal end and a distal end, with an ablation tip electrode disposed at the distal end. A source lead is electrically coupled to the tip electrode and extends through the shaft to the proximal end where it is terminated. An optional sense lead is also electrically coupled to the tip electrode and extends through the shaft to the proximal end. The system further includes a source return (e.g.

Abstract: The present disclosure illustrates a temperature sensing device capable of automatically switching mode, and a method thereof. The temperature sensing device includes a control unit configured to determine that the temperature sensing device is to enter or leave from a first mode or a second mode; a power supply unit configured to provide power required by the temperature sensing device; a power circuit including the power supply unit and is electrically connected to the control unit for power supply. The power circuit includes a detection unit electrically connected to the power supply unit and the control unit, and the detection unit is configured to detect when the temperature sensing device is moved from a standing state, and enable the control unit to determine that the temperature sensing device is to leave from the first mode and enter the second mode.

Abstract: An electronic device may include a shaft insertable into a target area, and an electronic component configured to generate a signal. The electronic component may be on or within the shaft. The electronic device may also include at least one antenna on or within the shaft. The electronic device may also include a receiver operatively coupled to the antenna. The receiver may monitor an electrical characteristic of the antenna to identify an effect of an electromagnetic field on the electrical characteristic of the antenna. The electronic device may also include a processor communicatively coupled to the receiver. At least one of the receiver and the processor may predict an effect of the electromagnetic field on the signal generated by the electronic component, based at least in part on the effect of the electromagnetic field on the electrical characteristic of the antenna.

Abstract: An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

Abstract: A method for locating a radio frequency identification (RFID) tag, comprising: monitoring by an RFID reader device at least two distance measurements of an RFID tag from the RFID reader device; monitoring a relative location of the RFID reader device for each of the distance measurements by analyzing orientation data and translational movement data of the RFID reader device; and calculating a location of the RFID tag relative to a current location of the RFID reader device based on the at least two distance measurements and the relative locations.

Abstract: This invention concerns a device (1) for detecting and monitoring the temperature of the esophagus (E) during cardiac ablation treatments, which makes it possible to continuously and automatically monitor the correct positioning of the temperature sensors (3a, 3b, 3c, 3d, 3e).

Abstract: Systems and method are provided for monitoring a patient during surgery. An anesthetic machine includes a ventilator configured to provide breathable gas to a patient, an oxygen concentration sensor configured to monitor the concentration of oxygen in gas inhaled and exhaled by the patient, and a respiratory monitor configured to monitor a respiratory rate and a tidal volume of the patient. An uptake rate estimator is configured to estimate a pulmonary oxygen uptake rate (ViO2) for the patient from the concentration of oxygen in gas inhaled and exhaled by the patient and a minute volume of the patient. A risk score calculator is configured to determine a risk score for the patient at each interval as a function of the estimated ViO2 value. An output device is configured to provide the determined risk score to a human operator.

Abstract: A dispenser system includes an inconspicuous, tamper-resistant bracket used to mount containers, bottles, vessels, dispensers or other articles to a wall surface. A coupling structure engages with and supports the article for use. The coupling structure may comprise a male-female coupling structure including, for example, a vertical rail on one of the bracket or container, and a corresponding vertical slot on the other of the bracket or container. An upper panel, door or lid opens with a tool or key, providing access to the bracket coupling structure. A spring biases the panel, door or lid into an open condition, and a latch mechanism maintains the panel, door or lid in a closed and locked condition until opened. The system may further including a proprietary container with dimensions to visually obscure the bracket. The container may include a dispensing pump, and may be filled or refilled with a personal hygiene product.

Abstract: An apparatus for automatic radio-frequency identification (RFID). In an embodiment, the apparatus comprises a flexible strap comprising a plurality of holes and a buckle configured to buckle to any one of the plurality of holes, such that, when the buckle is buckled to one of the plurality of holes, the strap forms a closed loop. The apparatus further comprises one or more tag enclosures. Each tag enclosure comprises one or more buckles and a RFID tag configured to communicate identifying data to a reader device. The one or more buckles of each tag enclosure are each configured to buckle to any one of the plurality of holes on the strap such that the tag enclosure may be attached to the strap at any one of a plurality of positions on the strap.

Abstract: A temperature probe includes a handle and a shaft extending from the handle. The shaft includes a distal end, a proximal end, and a tip at the distal end. The temperature probe also includes a capacitance sensor disposed on one of the handle and the shaft, the capacitance sensor configured to measure a change in capacitance when positioned proximate a conductor. The temperature probe further includes a temperature sensor disposed on the shaft, the temperature sensor configured to measure a body cavity temperature of a patient.

Abstract: At least some aspects of the present disclosure feature an RF hydration sensor in an assembly, comprises a substrate; an antenna disposed on the substrate; an RF circuit electrically coupled to the antenna; a thermal source electrically coupled to the RF circuit for changing a thermal condition of a target area; and a sensing element thermally coupled to the thermal source for sensing a temperature of the thermal source. The RF hydration sensor wirelessly receives a power from a remote transceiver and provides at least part of the power to the thermal source.

Abstract: A system permits non-invasive measurement and wireless reporting of bodily functions of a subject wearing a diaper and an outer layer of clothing outside the diaper. The system comprises a butterfly housing which houses a plurality of sensors, a processor, a memory, and wireless circuitry. The butterfly housing has two double-arc shaped projections. Each double-arc shaped projection extends from an opposing side of the housing at a perimeter of the butterfly housing and has associated therewith a coupling clip. Each double-arc shaped projection and the associated coupling clip is configured to sandwich the outer layer of clothing to removably couple the butterfly housing to the outer layer of clothing without necessitating any modification to the outer layer of clothing. Every measurement of the bodily functions occurs without any direct contact between a skin of the subject and the butterflying housing.

Abstract: An apparatus and method for treatment of a tubular anatomical structure is disclosed. The method includes using an electrical energy to destroy elongated cells on the tubular anatomical structure. The apparatus may include one or more electrodes for creating an electric field, and a cooling system for carrying heat away from the electrode. The elongated cells can include nerve cells on the tubular anatomical structure.

Abstract: A wearable monitoring device comprising a printed circuit board having a first side and a second side opposite the first side, wherein the printed circuit board is configured to couple to at least one sensor configured to monitor a physiological condition; a first padding layer coupled to the printed circuit board proximate the first side; a second padding layer coupled to the printed circuit board proximate the second side; a first protective layer coupled to the first padding layer opposite the printed circuit board; a second protective layer coupled to the second padding layer opposite the printed circuit board, the first protective layer and the second protective layer seal together and enclose the first and second padding and the printed circuit board; a power source coupled to the printed circuit board.

Abstract: Embodiments disclosed herein include an intelligent health monitoring engine comprising: a processor; a memory; a communications interface to receive data from a remote intelligent health monitoring device; a non-transitory computer readable medium storing machine readable instructions that, when executed by the processor, cause the intelligent health monitoring engine to: acquire temperature data associated with an animal based on one or more temperature measures obtained by remote intelligent health monitoring device; determine whether the temperature data acquired satisfies a health condition criteria; identify a treatment modality to be delivered to the animal to treat a health condition if a health condition criteria has been satisfied; identify a caregiver for the animal; and provide treatment modality information to the caregiver.

Abstract: Embodiments are related to systems and methods for data determining information about a subject, and more particularly to systems and methods for utilizing and distributing information related to measurements of a human subject.

Abstract: A method to determine a position and a state of a personal activity monitor worn by a user, such personal activity monitor comprising a motion sensor formed as an at least 3-axis accelerometer and a processor unit, the method comprising the steps of determining a number of changes of predominant axis per time period, and comparing it with exceeds a first predetermined threshold in order to infer a wrist worn condition, the method comprising the steps of determining a current level of activity and a temperature criterion to infer that the personal activity monitor is actually worn by the user and that the user has entered a sleep phase, or to infer that the user has emerged from sleep.

Abstract: According to the invention, a massage device for the massage of body parts is provided which includes a massage portion having, within a housing, a vibration-producing device, an energy storage unit, a control unit, and a wireless communications device; a cable, connected at one end to the massage portion; and a plug, arranged at the other end of the cable and adapted to establishing a connection with a charging device. The plug is flat and includes a printed circuit board having two USB-compatible charging electrodes and an antenna configured as a PCB or chip antenna for sending radio signals from and receiving radio signals in the wireless data communications device.

Abstract: A power source delivers oscillating electrical energy to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

Abstract: Devices and methods for cooling microwave antennas are disclosed herein. The cooling systems can be used with various types of microwave antennas. One variation generally comprises a handle portion with an elongate outer jacket extending from the handle portion. A microwave antenna is positioned within the handle and outer jacket such that cooling fluid pumped into the handle comes into contact directly along a portion of the length, or a majority of the length, or the entire length of the antenna to allow for direct convective cooling. Other variations include cooling sheaths which form defined cooling channels around a portion of the antenna. Yet another variation includes passively-cooled systems which utilize expandable balloons to urge tissue away from the surface of the microwave antenna as well as cooling sheaths which are cooled through endothermic chemical reactions. Furthermore, the microwave antennas themselves can have cooling lumens integrated directly therethrough.

Abstract: Disclosed is a wearable device. The wearable device includes an optical signal transmission unit configured to transmit optical signals, an optical signal sensing unit configured to receive reflected optical signals, a data processing unit configured to process the reflected optical signals, and a coordinate generating unit configured to generate 3-dimensional coordinate from the processed data.

Abstract: An animal wellness notification system includes an attachment body configured to securely engage with an ear of the animal; an elongated temperature probe secured to the attachment body and configured to extend within the ear of the animal; a housing secured to the attachment body; a computer disposed within the housing and operably associated with the temperature probe; and a notification device in data communication with the computer, the notification device being configured to provide notice if a temperature of the animal goes beyond a determined threshold.

Abstract: A system for detecting blood pressure based on imaging photoplethysmography (iPPG) includes a first inward-facing head-mounted camera to capture images of a first region of interest located on the face below the eyes and above the lips (IMROI1) of a user, and a second inward-facing head-mounted camera to capture images of a second region of interest comprising a portion of a temple and/or forehead (IMROI2) of the user. The system further includes a computer to calculate a blood pressure value for the user based on first and second photoplethysmographic signals recognizable in IMROI1 and IMROI2.

Abstract: What is disclosed is a system and method for classifying the hormone receptor status of malignant tumorous tissue identified in a thermographic image of a breast. One embodiment of the present method involves the following. First, receive thermographic image(s) of both breasts of a patient with a malignant tumorous region and analyzing the image(s) to define a boundary contour of the breast. Then, the breast regions are segment into regions of elevated temperature. A function of first probability mass function Q, ƒ(Q), is determined based on temperatures of pixels within a first segmented region. A function of the second probability mass function P, ƒ(P), is determined based on temperatures of pixels within a second region. A distance measure between the two functions ƒ(Q) and ƒ(P) is calculated and provided to a classifier trained to classify the malignant tissue as hormone receptor positive, and negative otherwise, based on the distance measure.

Abstract: The invention relates to electrodes used in ablation catheter devices, where the electrodes contain two or more thermal sensors at different positions within the electrode that are capable of detecting temperature differences along the external surface of the electrode. In preferred embodiments, the thermal sensors are separated by one or more thermal insulating members and the thermal sensors are positioned near the external surface of the electrode at about the same distance from the end of the electrode, so that temperature measurements can indicate the position of the electrode with respect to the tissue desired to be ablated.

Abstract: To provide a livestock management system, a sensor apparatus, and an estimation method for a state of a livestock animal with which states of livestock animals can be easily and accurately estimated. A livestock management system according to the present technology includes a management apparatus. The management apparatus includes a reception unit that receives power generation information from a sensor apparatus attachable to a livestock animal. The sensor apparatus includes a power generation unit, a transmission unit, and a control unit. The power generation unit generates electric power in a manner that depends on a surrounding environment. The transmission unit transmits the power generation information of the power generation unit with the electric power generated by the power generation unit. The control unit estimates a state of the livestock animal on the basis of the power generation information.

Abstract: What is disclosed is a system and method for breast cancer screening which determines whether hot spots, as seen in a thermal image of both breasts, can be classified as possibly malignant based on a measure of symmetry. A thermographic image of both breasts of a patient is received and analyzed to determine whether there exists, in each of a left breast and a right breast, a hot spot comprising a patch of pixels with an elevated temperature with respect to surrounding tissue. If a hot spot has been identified in each breast then a measure of symmetry comprising a ratio of an area of a smaller hot spot to an area of a larger hot spot is extracted from the thermographic image. The measure of symmetry is provided to a classifier system trained to classify an unclassified hot spot as malignant or non-malignant based on a measure of symmetry.

Abstract: A catheter and method for the treatment of a patient having atrial flutter or other arrhythmia comprises an elongated catheter body having an outer wall, proximal and distal ends, and at least one lumen extending therethrough. Further it has a distal tip section comprising a flexible tubing having a proximal end and a distal end and a plurality of lumens extending therethrough. The proximal end of the tip section is fixedly attached to the distal end of the catheter body. The tip section further comprises a nitinol tube having slots formed therein which causes the distal tip section to deflect using the same puller-wire action used to cause the deflectable catheter to deflect at a point proximal to the distal tip section.

Abstract: Provided are a health care device and a method of operating the health care device. The method includes: detecting, by the health care device, biosignal information of a user through skin of the user; obtaining health status information of the user by using the detected biosignal information; providing a task of the user for improving a health status, according to the obtained health status information; and monitoring whether the user achieves the provided task.

Abstract: The subject matter disclosed herein provides methods for presenting glucose level data. Glucose data for a patient may be received. A current glucose level and a rate of change of the current glucose level may be determined based on the received glucose data. A first interface may be displayed on a screen of a device. The first interface may include a unitary icon. The unitary icon may display the current glucose level and a visualization of the rate of change. Related apparatus, systems, techniques, and articles are also described.

Abstract: A system for managing a group of dairy animals includes a dwelling space, such as an animal shed, in which the dairy animals can roam. A dairy animal-related device for performing a dairy animal-related operation is arranged in the dwelling space. The dairy animals in the dwelling space can walk to the dairy animal-related device through the dwelling space. A luring system includes luring devices, each of which is attached to in each case one of the dairy animals. The luring device of each dairy animal is activatable in order to give said dairy animal a luring signal so as to lure said dairy animal to the dairy animal-related device. A detection system is configured for detecting the position of each individual dairy animal in the dwelling space. The luring system is connected to the detection system for receiving the positions of the dairy animals in the dwelling space detected by the detection system.

Abstract: An ablation catheter includes a control handle and a catheter sheath removably connectable to the control handle, the catheter sheath defining a fluid lumen and having a plurality of perforations proximal the distal end of the catheter sheath. The ablation catheter further includes a shape-imparting element inserted into the fluid lumen of the catheter sheath and removably connectable to the control handle. The shape-imparting element is connectable to an RF energy source so that, in use, the shape-imparting elements act as an electrode charging fluid into the fluid lumen to be expelled through the plurality of perforations on the catheter sheath.

Abstract: A passive planar thermo-optical structure for detection of a region of changed temperature on patient's skin is provided. The thermo-optical structure has a layered structure including a transparent film layer, a thermochromic layer, a securing layer, an adhesive layer, and a protective layer. At least one dye in the thermochromic layer is above a temperature threshold range of 31°-37° C., which adopts the first color and keeps it in a temperature range greater than or equal to 0.6° C. A width of this temperature range, in which the color is indefinite, is smaller than 0.3° C. A method of diagnosing allergy using the above-structure is provided. The method includes the steps of stimulation, measurement and comparison. After stimulating three regions of patient's skin, an evaluation of extent of histamine reaction is performed. Then, the extent of histamine reaction in the third region is compared to that in the first and second regions.

Abstract: Systems and methods are described herein for extracting inertial information from nonlinear periodic signals. A system for determining an inertial parameter can include circuitry configured for receiving a first periodic analog signal from a first sensor that is responsive to motion of a proof mass, converting the first periodic analog signal to a first periodic digital signal, determining a result of trigonometrically inverting a quantity, the quantity based on the first periodic digital signal, and determining the inertial parameter based on the result.

Abstract: An animal monitoring device configured as a bolus for oral administration to reside in the reticulorumen of a ruminant animal. The animal monitoring device includes a memory element, a processor in communication with the memory element and a computer code contained in the memory element. The computer code includes a power management module executable by the processor to regulate power use by the bolus based on determination of remaining energy stored in an energy source and the determined power requirements over a pre-determined life cycle of the bolus.

Abstract: A temperature determination method includes temporarily contacting a forehead of a subject with a first surface of a removable patch, and exposing a second surface of the patch opposite the first surface to ambient conditions. The method also includes sensing a temperature of the first surface of the patch while the first surface is in contact with the forehead at a first location thereon, sensing a temperature of the second surface of the patch, and calculating a sub-skull temperature of the subject based on the sensed temperatures of the first and second surface.

Abstract: A wireless, patient-worn, physiological sensor configured to, among other things, help manage a patient that is at risk of forming one or more pressure ulcers is disclosed. According to an embodiment, the sensor includes a base having a top surface and a bottom surface. The sensor also includes a substrate layer including conductive tracks and connection pads, a top side, and a bottom side, where the bottom side of the substrate layer is disposed above the top side of the base. Mounted on the substrate layer are a processor, a data storage device, a wireless transceiver, an accelerometer, and a battery. In use, the sensor senses a patient's motion and wirelessly transmits information indicative of the sensed motion to, for example, a patient monitor. The patient monitor receives, stores, and processes the transmitted information.

Abstract: Erosion sensors and systems, methods, and computer products thereof are operative to determine and provide real time erosion data. Such data may be used to determine in real time an amount of erosion or ablation on an ablative surface, for instance, of a rocket or missile launch pad, of an exhaust management system, of an extraterrestrial vehicle, or of a fire detection system.

Abstract: A thermal surgical instrument comprising a conductor having a ferromagnetic material in electrical communication with the conductor, such that passage of electrical energy through the conductor causes substantially uniform heating of the ferromagnetic material sufficient to produce a desired therapeutic tissue effect is provided. The conductor may be shaped to facilitate resection of tissue from a patient and include a support to provide increase rigidity to the loop so that the conductor better resists bending during use. The ferromagnetic material quickly heats and cools in response to a controllable power delivery source. The thermal surgical instrument can be used for substantially simultaneously resecting tissue with hemostasis.

Abstract: A method for locating a radio frequency identification (RFID) tag, comprising: monitoring by an RFID reader device at least two distance measurements of an RFID tag from the RFID reader device; monitoring a relative location of the RFID reader device for each of the distance measurements by analyzing orientation data and translational movement data of the RFID reader device; and calculating a location of the RFID tag relative to a current location of the RFID reader device based on the at least two distance measurements and the relative locations.