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Publication Number
US-12419527-B2
Publication Date
2025-09-23
Expiration Date
Abstract
A finger wearable device for monitoring vital signs at a finger includes a housing, a finger cuff, a plurality of vital sign sensors, and an electrocardiogram (ECG) sensor. The housing includes an interface surface for pressing against the finger. The finger cuff attaches to the housing and has a size and a shape to secure the housing to the finger and force the interface surface against the finger when the finger cuff is worn around the finger. The vital sign sensors are disposed in or on the housing and orientated to measure the vital signs from the finger of a wearer. The ECG sensor is disposed in or on the housing and coupled to first and second electrodes to measure ECG signals. The second electrode is disposed on the interface surface.
Core Innovation
A finger wearable vital signs monitor includes a finger cuff with a housing and an interface surface pressed against the finger. The cuff is attached to the housing and has a size and a shape to secure the housing to the finger and force the interface surface against the finger. A plurality of vital sign sensors are disposed in or on the housing and oriented to measure vital signs from the finger, including blood pressure at the digital artery and multi-sensor measurements.
The device includes a photoplethysmogram (PPG) sensor for oxygen saturation level, pulse rate, and respiratory rate from the extremity via the interface surface. The device includes a blood pressure sensor for blood pressure of the wearer from the extremity via the interface surface, and a temperature sensor configured to measure core body temperature of the wearer.
The device further includes an electrocardiogram (ECG) sensor disposed in or on the housing and coupled to electrodes positioned for ECG signal acquisition while the interface surface is pressed against the finger. For common mode rejection of electrical interference, an ECG second electrode is subdivided into a first sub-electrode and a second sub-electrode electrically insulated from each other on the interface surface.
Claims Coverage
The independent claims cover a wearable device having a housing with an interface surface and a cuff to press the interface surface against an extremity, multiple vital sign sensors, and an ECG sensor with electrode arrangements. Across the independent claims, the inventive features are organized around extremity and cuff/interface structure, ECG electrode placement and configuration for common mode rejection, sensor modalities including PPG oxygen saturation, pulse rate, respiratory rate, blood pressure, and core temperature, and a finger-specific cuff and electrode relationship.
Interface surface pressed against extremity with cuff-secured housing
A housing including an interface surface for pressing against the extremity; a cuff attached to the housing and having a size and a shape to secure the housing to the extremity and force the interface surface against the extremity when the cuff is worn around the extremity; and a plurality of vital sign sensors disposed in or on the housing and orientated to measure the vital signs from the extremity of a wearer of the wearable device.
ECG electrodes with interface-surface second electrode and insulated sub-electrodes for common mode rejection
An electrocardiogram (ECG) sensor disposed in or on the housing and coupled to first and second electrodes to measure ECG signals, wherein the second electrode is disposed on the interface surface; wherein the first electrode is disposed on a second surface of the housing different from the interface surface; wherein the second electrode is subdivided into a first sub-electrode and a second sub-electrode for common mode rejection of electrical interference while measuring the ECG signals; and wherein the first and second sub-electrodes are disposed on the interface surface and electrically insulated from each other.
PPG oxygen saturation, pulse rate, respiratory rate, blood pressure, and core body temperature from extremity via interface surface
The vital sign sensors include a photoplethysmogram (PPG) sensor disposed to measure an oxygen saturation level, a pulse rate, and a respiratory rate from the extremity via the interface surface; a blood pressure sensor disposed to measure a blood pressure of the wearer from the extremity via the interface surface; and a temperature sensor configured to measure a core body temperature of the wearer.
Finger cuff forcing housing against finger with third ECG electrode on cuff
A finger wearable device comprising a housing; a finger cuff attached to the housing and adapted to force the housing against a finger of a first hand of a wearer; a plurality of vital sign sensors disposed in or on the housing and orientated to measure vital signs from the finger; and an electrocardiogram (ECG) sensor disposed in or on the housing and coupled to first, second, and third electrodes to measure ECG signals, wherein the first and second electrodes are disposed on the housing with the second electrode positioned to contact the finger when the finger cuff is worn around the finger and the third electrode is disposed on the finger cuff and positioned for contacting a lower limb of the wearer while the first electrode is reachable by a second hand of the wearer.
Overall, the independent claims cover a cuff-and-interface-surface wearable for monitoring vital signs at an extremity with multiple vital sign sensors, together with ECG electrode placement and configurations that place an ECG electrode on the interface surface, use a housing surface opposite the interface surface for another electrode, optionally subdivide the interface-surface electrode into insulated sub-electrodes for common mode rejection, and provide a third cuff electrode for lower-limb contact.
Stated Advantages
Documented Applications
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