Koninklijke Philips Corporation N.v.

Koninklike Philips N.v.

Wouter Herman Peeters

Rick Bezemer

Gerardus Johannes Nicolaas Doodeman

Mark Peter Paul Kleijnen

Jens Muehlsteff

Jacobus Josephus Leijssen

Ceren Bagatar

Simone Cornelia Maria Anna Ordelman

Sandra Liliana Ramirez Herrera

Ernest Roderick Laman

Ralph Wilhelm Christianus Gemma Rosa Wijshoff

Tom Kassenaar

Ronny Hubertus Johannes Grosfeld

Tim Patrick Steunebrink

Ronaldus Maria Aarts

Johannes Wilhelmus Weekamp

Pierre Hermanus Woerlee

Dirk Willem Harberts

Ercan Ferit Gigi

Paul Aelen

Egbertus Reinier Jacobs

Igor Wilhelmus Franciscus Paulussen

Pavankumar Murli Dadlani Mahtani

Eckhardt Henricus Matheus Schraven

Xi Long

Gilbert Martinus Verbeek

Pavankumar Murll Dadlani Mahtani

Pavankumar Murli Dadlani

Toeno Van Der Sar

Egbertus Reiner Jacobs

Carlijn Andrea Vernooij

Suzanne Danielle Van Der Zaan-Landwehr Johan

Shaoxiong Sun

Joseph Ernest Rock

Jens MÜHLSTEFF

Mark Kleijnen

Suzanne Daniëlle Van Der Zaan - Landwehr Johan

A system () and method is for extracting from sensed induction signals, component signals pertaining to different physiological phenomena in the body. A resonator circuit () is oscillated at a certain frequency to generate an alternating electromagnetic field which is applied to a body to be investigated. This field induces secondary eddy currents in the body which interact with the primary magnetic field and alter at least the frequency and amplitude of the resonator circuit oscillating current. These changes in the current characteristics, in particular the frequency and amplitude, are measured and provide first and second input signals. A system () or method is provided by embodiments of the invention which is arranged to receive these input signals. A multitude of different composite or fused signals are then generated by the system, each formed from a different linear combination ratio of the two input signals. These are then assessed with a signal selection procedure to identify a best candidate signal for providing a measure or indication of a particular one or more physiological phenomena. This can be based on pre-defined selection criteria, for example relating to signal characteristics of the candidate signals.

Inductive sensing system and method

In a sensor system (), output signals of at least one PPG sensor () are processed to derive a modified pulse amplitude variation (PAV) value, being modified to take account of a baseline variation of the PPG sensor output signal. In particular, the modified PAV is derived through performing a modification step () in which either: a baseline variation of the PPG sensor output is derived and combined with a previously derived PAV, or, a PPG sensor output is first processed to perform baseline variation compensation, in advance of then deriving a PAV from the compensated signal.

Sensor system and sensing method for use in assessment of circulatory volume

A wearable gear for holding a physiological sensor for monitoring a subject, such as a pulse oximeter. Said wearable gear being configured to automatically adjust the maximal length such that the predefined tension is obtained regardless of the size of the body part of the subject. The wearable gear comprises a tensioning element having a maximal length, a holding unit for holding the physiological sensor, the wearable gear further comprises a tension mechanism for tensioning the tensioning element to a predefined tension when at least partially around a body part of the subject, wherein the tension mechanism comprises i) a first part comprising a resilient material, and ii) a second part comprising a non-resilient material, and wherein the first part and the second part mechanically cooperate with each other to automatically adjust the maximal length such that the predefined tension is obtained regardless of the size of the body part.

Gear for holding a physiological sensor

An inductive sensing device comprises first () and second () loops, the first loop () being coupled with a capacitor to form a resonator circuit (), and the resonator circuit and second loop being coupled via an active buffering component (). The active buffering component provides voltage to current amplification, and an output of the buffering component drives a current in the second loop. Conductive lines forming each of the first and second loop parts are radially spaced apart.

Inductive sensing device and method

An apparatus () for use in inductive sensing includes a loop antenna () and a signal generator () for driving the antenna, these forming a resonator circuit (). The resonator circuit is drivable in a drive state in which the antenna is driven at resonance to thereby generate electromagnetic signals. The arrangement further includes a switching means () for switchably inhibiting the drive state of the antenna This allows in use controllable switching of the antenna in and out of the drive state to thereby control switching signal generation on and off.

Apparatus for use in inductive sensing

The invention provides a magnetic inductive sensing device () comprising a loop antenna () for inductively coupling with electromagnetic (EM) signals emitted from a medium in response to stimulation of the medium with electromagnetic excitation signals. The device includes an electromagnetic shield () element which is arranged such as to intercept electromagnetic signals travelling to or from the antenna. The shield element is formed of conductive material such as to block electrical field components of incident signals but further incorporates a non-conductive gap in the material so as to prevent the formation of eddy currents. A loop of the antenna is broken by an opening, the opening being bridged by a capacitor, and the device comprises a signal processing means which is electrically coupled to the antenna via only a single point of the antenna, located to one side of the opening.

Magnetic inductive sensing device and method

The invention provides a magnetic inductive sensing system for sensing electromagnetic signals emitted from a body in response to electromagnetic excitation signals applied to the body. The electromagnetic signals are generated and sensed by the same loop resonator which comprises a single-turn loop antenna and a tuning capacitor. The loop antenna of the resonator and a signal generation means for exciting the resonator to generate excitation signals are together configured so as to optimize the value of a ratio between the radial frequency of the generated electromagnetic excitation signals and a reference frequency of the antenna, where the reference frequency is the frequency for which one wavelength of the generated excitation signals (waves) matches the circumferential length of the antenna. This ratio, which corresponds to a normalized radial frequency of the generated excitation signals, is maintained between a value of 0.025 and 0.50.

Inductive sensing system for sensing electromagnetic signals from a body

The present invention relates to a device for measuring a physiological parameter of a human limb such as peripheral capillary oxygen saturation. The device comprises a body comprising a first body part and a second body part, which are movable relative to each other to define an opening with an adjustable size for receiving the limb therein, and a physiological sensor for interacting with the limb received in the opening, the sensor being attached to the body, wherein the first and second body parts are slidable or twistable relative to each other while at least partially engaging or intersecting each other, or wherein the first and second body parts are configured to form a clip having an L-shaped end section for at least partially enclosing the limb received in the opening, in order to adjust the size of the opening.

Device and method for measuring a physiological parameter of a human limb

A wearable gear () for holding a physiological sensor for monitoring a subject, such as a pulse oximeter. Said wearable gear being configured to automatically adjust the maximal length such that the predefined tension is obtained regardless of the size of the body part of the subject. The wearable gear comprises a tensioning element () having a maximal length, a holding unit for holding the physiological sensor, the wearable gear further comprises a tension mechanism for tensioning the tensioning element to a predefined tension when at least partially around a body part of the subject, wherein the tension mechanism comprises i) a first part comprising a resilient material, and ii) a second part comprising a non-resilient material, and wherein the first part and the second part mechanically cooperate with each other to automatically adjust the maximal length such that the predefined tension is obtained regardless of the size of the body part.

A device for supporting determination of return of spontaneous circulation, ROSC, during an associated cardiopulmonary resuscitation, CPR, procedure which is being performed on an associated patient. A sensor is used to sense a physiological signal of the patient. Frequency analysis of the signal is carried out to extract dominant fundamental frequency components in the signal. From this analysis it is possible to determine that there has been a potential ROSC.

Determining return of spontaneous circulation during CPR

A device is configured for tracking e.g. the diastolic blood pressure in a patient. The device applies a pressure to a body part, e.g. by use of an inflatable cuff. By performing repeated and alternating pressure changes in the cuff, a specific feature of a signal that relates to the diastolic blood pressure can be tracked and possibly measured. The device may have particular use in conjunction with cardiopulmonary resuscitation devices.

Apparatus for tracking a specific blood pressure

A device (&#x2033;) includes a light source () and a light detector () spaced from, and in communication with, the light source (). An electronic processor () is programmed to compute pulse oximetry data from output of the light detector (). A clamping member () is included, on or in which the light source () and the light detector () are disposed. The clamping member () is configured for attachment to a human body part with the body part disposed between the light source () and the light detector () such that light from the light source () passes through the body part to reach the light detector (). The clamping member () is configured to attach to the body part by transitioning from a first stable state to a second stable state via a compression force applied to the clamping member ().

Multi-state clip-on fixation method for pulse oximeter

An optical source for guiding light to a target of a patient includes at least one light source configured to emit red light and infrared light. The at least one light source is embedded within a light-conducting sheet. A photodistributor is spaced from the at least one light source. The photodistributor includes a light-emitting surface and at least one light-receiving surface optically coupled to the light-conducting sheet. The photodistributor is configured to discharge at least a portion of the emitted red light and at least a portion of the emitted infrared light into a target.

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Waalre, Netherlands

Wouter Herman Peeters