Provided here are systems and methods for the collection of a biological fluid sample from a subject. These automated systems can be programmed to extract a particular amount of biological fluid samples on a periodic basis from a patient.

A patient movement detector can receive inputs from position sensors, a thermal imaging camera, a video camera, and/or triangulation data. Based on one or more of these inputs, the patient movement detector can perform one or more of the following: fall prevention detection, bedsore prevention analysis, patient location detection, and patient walk test scoring. The patient movement detector can, for example, output a fall warning alarm, a bedsore warning alarm, patient location information, and walk test scores.

An implantable pulse generator device (110) comprising a processor (117) configured to: receive, in a charging mode, electromagnetic radiation (106) from a charging device (102) wherein the electromagnetic radiation (106) transfers energy to the implantable device (110) to charge an energy storage device (104); measure, in a measurement mode, an electrical field parameter signal representing a neural response; and selectively transition between the charging mode and the measurement mode, such that the implantable device (110) does not receive electromagnetic radiation (106) from the charging device (102) during the measurement of the electrical field parameter signal.

An ambulatory medical device comprises: a sensing component to be disposed on a patient for detecting a physiological signal of the patient; and monitoring and self-test circuitry configured for detecting a triggering event and initiating one or more self-tests based on detection of the triggering event. The ambulatory medical device senses the physiological signal of the patient substantially continuously over an extended period of time.

A capsule apparatus comprising: an enclosure and a capsule core arranged in the enclosure. The capsule core comprises: a power supply, an acceleration sensor connected to the power supply, a switching element having an input terminal connected to the power supply and a control terminal connected to the acceleration sensor; a control unit connected to a first output terminal of the switching element; and a working system connected to a second output terminal of the switching element. The capsule core also comprises a microcontroller unit, the control unit is integrated in the microcontroller unit, and the output terminal of the switching element is connected to the microcontroller unit. The acceleration sensor can control the power on and off of the control unit and the working system according to different states.

The present disclosure relates a multi-leaf collimator. The multi-leaf collimator may include a plurality of leaves. At least two leaves of the plurality of leaves may be movable parallel to each another. For each leaf of at least some of the plurality of leaves, at least one portion of the leaf may have thicknesses varying along a longitudinal direction of the each leaf. The each leaf may have a first end and a second end along the longitudinal direction of the each leaf.

Techniques for estimating the temperature of an external portion of a medical device are described. In an example, processing circuitry may determine a temperature sensed by at least one temperature sensor of an internal portion of the device, and determine, based on an algorithm that incorporates the temperature of the internal portion of the device, an estimated temperature of a second portion of the device, wherein the algorithm is representative of an estimated temperature difference between the first portion of the device and the second portion of the device based at least in part on a dynamic transfer function that operates in a time-domain.

A method of monitoring a subject via a photoplethysmography (PPG) sensor configured to detect and/or measure PPG information from the subject includes changing, via a processor, signal analysis frequency of the PPG sensor signals, optical wavelength emission of the PPG sensor, and/or PPG sensor interrogation power at predetermined times. Each predetermined time is associated with measuring at least one different biometric parameter from a plurality of biometric parameters.

Various analyte sensor systems for controlling activation of analyte sensor electronics circuitry are provided. Related methods for controlling analyte sensor electronics circuitry are also provided. Various analyte sensor systems for monitoring an analyte in a host are also provided. Various circuits for controlling activation of an analyte sensor system are also provided. Analyte sensor systems utilizing a state machine having a plurality of states for collecting a plurality of digital counts and waking a controller responsive to a wake up signal are also provided. Related methods for such analyte sensor systems are also provided. Systems for controlling activation of analyte sensor electronics circuitry utilizing a magnetic sensor are further provided. One or more display device configured to display one or more analyte concentration values are also provided.

A retractor has an oximeter sensor at its tip, which allows measuring of oxygen saturation of a tissue being retracted by the retractor. The tip includes one or more openings for at least one source and detector. A specific implementation is a spinal nerve root retractor with an oximeter sensor.