Systems and methods for training remote photoplethysmography (“PPG”) models that outputs a subject PPG signal based on a subject video clip of a subject are described herein. The system may have a processor and a memory in communication with the processor. The memory may include a training module having instructions that, when executed by the processor, cause the processor to train the remote PPG model in a self-supervised contrastive learning manner using an unlabeled video clip having a sequence of images of a face of a person.

A method for detecting and identifying a patient physiological response includes stimulating, via a stimulating electrode coupled to a patient, one or more nerves of the patient. The method includes recording, via a recording electrode coupled to the patient, a plurality of resultant electrical waveforms. The method includes determining, based on the plurality of resultant electrical waveforms, whether at least a subset of the plurality of resultant electrical waveforms includes a patient physiological response. The determining includes comparing the subset of resultant electrical waveforms of the plurality of resultant electrical waveforms to a model waveform from a database of a plurality of model waveforms. The determining includes determining, based on the comparison, a comparison feature. The comparison feature indicates whether the patient physiological response exists in the subset. The method includes displaying, via a display, an indication that the patient physiological response exists in the subset of resultant electrical waveforms.

A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler. The powered handle can include a manual return mechanism.

Embodiments of the present disclosure provide a blood pressure measuring method, a blood pressure measuring apparatus, an electronic device and a computer readable storage medium. The electronic device includes a processor configured to: acquire an electrocardiosignal and a blood oxygen volume wave signal of a target object within a preset measurement period; and determine beat-wise blood pressure values of the target object within the preset measurement period by means of a first trained blood pressure calculation model based on the acquired electrocardiosignal and blood oxygen volume wave signal.

At least some embodiments of the present disclosure is directed to a method of processing cardiac information. The method includes the steps of: receiving an activation waveform comprising a set of activation waveform data; receiving a range of window size. For each of the plurality of window sizes, the method further includes the steps of: selecting a position of a central window; calculating a set of backward correlations; calculating a set of forward correlations; determining a backward confidence value based on the set of backward correlations; and determining a forward confidence value based on the set of forward correlations. Additionally, the method includes the steps of: comparing the set of confidence values to select a designated confidence value and a selected window size corresponding to the designated confidence value; and determining a local cycle length based on the selected window size.

Methods, systems, and devices for providing guidance during rest and recovery are described. A method may include receiving physiological data associated with a user from a wearable device. The method may include providing, to a user device associated with the user, a first set of physical activity targets and a first set of activity messages based on the received physiological data, where the first set of physical activity targets and the first set of activity messages associated with a first operational mode associated with the user. The method may include identifying a trigger to transition from the first operational mode to a second operational mode associated with the user. The method may include providing, to the user device based on identifying the trigger, a second set of physical activity targets and a second set of activity messages based at least in part on the received physiological data, where the second set of physical activity targets and the second set of activity messages associated with the second operational mode.

A monitoring or tracking system may include an input port and a controller in communication with the input port. The input port may receive data from a data recorder. The data recorder is optionally part of the monitoring system and in some cases includes at least part of the controller. The controller may be configured to receive data via the input port, the data being related to a subject lifting an object. Using the data, the controller may locate body parts of the subject while the subject is lifting the object and monitor body movements of the subject during the lift. Further, the controller may be configured to determine a value related to a load of the object based on the body movements monitored. The controller may output via the output port the value determined and/or lift assessment information for the subject.

A system for testing different regions of the retina of a subject for retinal function, said system comprising: a monitor configured to display a visual electrophysiology stimulus to the subject, wherein the visual electrophysiology stimulus comprises a four ring visual electrophysiology stimulus; at least one active electrode; at least one reference electrode; and a computer configured to receive electrical signals from said at least one active electrode and said at least one reference electrode, and process the electrical signals.

The present invention provides a circuitry of a biopotential acquisition system comprising an input node, an ETI transmitter and an ADC. The input node is coupled to an electrode of the biopotential acquisition system, and the electrode is used to be in contact with a human body. The ETI transmitter is configured to generate a transmitter signal to the input node. The ADC is coupled to the input node, and is configured to process an input signal from the input node to generate a digital signal, wherein each of the input signal and the digital signal comprises components of an ECG signal and an ETI signal.

An automatic depression detection method includes the following steps of: inputting audio and video files, wherein the audio and video files contain original data in both audio and video modes; conducting segmentation and feature extraction on the audio and video files to obtain a plurality of audio segment horizontal features and video segment horizontal features; combining segment horizontal features into an audio horizontal feature and a video horizontal feature respectively by utilizing a feature evolution pooling objective function; and conducting attentional computation on the segment horizontal features to obtain a video attention audio feature and an audio attention video feature, splicing the audio horizontal feature, the video horizontal feature, the video attention audio feature and the audio attention video feature to form a multimodal spatio-temporal representation, and inputting the multimodal spatio-temporal representation into support vector regression to predict the depression level of individuals in the input audio and video files.