A stethoscope head with adjustable audio frequency, comprises: a head body having an annular step and a sound collecting surface at a front side of the head body; an annular fastener; and a diaphragm having an annular step and a footing, the diaphragm disposed on the sound collecting surface of the head body by the annular fastener which cooperates with the head body by screw threads, wherein, when the stethoscope head is in operation, the footing of the diaphragm is deformed in response to rotation of the annular fastener relative to the head body along the screw threads to regulate an audio frequency received by the diaphragm. The stethoscope head of the invention is convenient to assemble and the sound effect can be adjusted continuously.

A tubing assembly for electronic catheter guidance systems is provided and can include a catheter, an internal acoustic transducer and an external acoustic transducer. The catheter extends in a longitudinal direction and has proximal and distal ends that define a lumen therebetween. Further, the catheter is configured for placement within a patient's digestive or respiratory tract. The internal acoustic transducer can be located within the catheter's lumen, and the external acoustic transducer can be located on or outside the patient's body. The transducers can transmit and/or receive acoustic signals as directed by a processor and communicate with the processor to deliver sound data to a display device. The frequency response and/or attenuation of the signals can indicate placement of the catheter in the digestive tract compared to the respiratory tract. A catheter guidance system and method for accurately placing a catheter in the digestive or respiratory tract are also provided.

A breathing apparatus includes a source of compressed air and a lung demand valve that receives compressed air from the source. A pneumatic valve assembly is connected between the source and the lung demand valve. The pneumatic valve assembly is moveable between a first closed position that prevents a flow of compressed air to the lung demand valve and a second open position that provides a path for compressed air to flow to the lung demand valve. A mask receives the lung demand valve therein. The mask provides the compressed air to a user and having a first operational mode providing filtered ambient air to the user and a second operational mode providing compressed air to the user. A control device is coupled to the pneumatic valve assembly. The control device detects a condition in the air surrounding the apparatus and controlling the pneumatic valve assembly to move between the first closed and second open position and the mask to operate in a respective one of the first and second operational modes.

A system for non-invasively determining an indication of an individual's blood pressure is described. In certain embodiments, the system calculates pulse wave transit time using two acoustic sensors. The system can include a first acoustic sensor configured to monitor heart sounds of the patient corresponding to ventricular systole and diastole and a second acoustic sensor configured to monitor arterial pulse sounds at an arterial location remote from the heart. The system can advantageously calculate a arterial pulse wave transit time (PWTT) that does not include the pre-ejection period time delay. In certain embodiments, the system further includes a processor that calculates the arterial PWTT obtained from the acoustic sensors. The system can use this arterial PWTT to determine whether to trigger an occlusive cuff measurement.

A system for non-invasively determining an indication of an individual's blood pressure is described. In certain embodiments, the system calculates pulse wave transit time using two acoustic sensors. The system can include a first acoustic sensor configured to monitor heart sounds of the patient corresponding to ventricular systole and diastole and a second acoustic sensor configured to monitor arterial pulse sounds at an arterial location remote from the heart. The system can advantageously calculate a arterial pulse wave transit time (PWTT) that does not include the pre-ejection period time delay. In certain embodiments, the system further includes a processor that calculates the arterial PWTT obtained from the acoustic sensors. The system can use this arterial PWTT to determine whether to trigger an occlusive cuff measurement.

A stethoscope system may include an array of sensors, which may include pressure sensors. The array may be implemented in a wearable “patch” that is conformable to a patient's body. The stethoscope system may include a control system that is capable of receiving signals from the array of sensors. The signals may, for example, correspond to measurements from multiple pressure sensors of the array. The control system may be capable of combining signals from multiple pressure sensors to produce combined signals. The control system may be capable of filtering the combined signals to remove, at least in part, breathing signal components and to produce filtered signals. The control system may be capable of determining a correspondence between heart signal components of the filtered signals and corresponding heart valve activity.

An Integrated CardioRespiratory (ICR) System is provided for continuous Ejection Fraction (EF) measurement using a wearable device comprising a plurality of acoustic sensors. The ICR system performs signal processing computations to characterize cardiac acoustic signals that are generated by cardiac hemodynamic flow, cardiac valve, and tissue motion, and may use advanced machine learning methods to provide accurate computation of EF.

A cover assembly for use with a stethoscope is provided and the cover assembly includes a head overlay element and a pre-deployment protection component. The head overlay element is operable to overlay the stethoscope head in a deployed disposition of the assembly in which the cover assembly is releasably retained on the stethoscope. The pre-deployment protection component advantageously protects the head overlay element against the detrimental effects of moisture, debris, or other substances that would degrade the operation of either the cover assembly or the stethoscope once the cover assembly is deployed on the stethoscope.

A cover assembly for use with a stethoscope is provided and the cover assembly includes a head overlay element and a pre-deployment protection component. The head overlay element is operable to overlay the stethoscope head in a deployed disposition of the assembly in which the cover assembly is releasably retained on the stethoscope. The pre-deployment protection component advantageously protects the head overlay element against the detrimental effects of moisture, debris, or other substances that would degrade the operation of either the cover assembly or the stethoscope once the cover assembly is deployed on the stethoscope.

The invention relates to an appliance for vaginal penetration, comprising a grip (2), said appliance being designed to receive a working tool, especially an insemination gun (4) that passes through the grip, characterised in that it comprises a guiding tube (8) extending the grip (2) in order to form a compact assembly, said guiding tube being designed so as to receive the front tip of the working tool (12) therein and receiving a video viewing means such as an endoscopy-type tube (14) comprising a lighting element on the front end thereof, the appliance for vaginal penetration comprising an electronic cell receiving the video images, provided with means for transmitting images to a remote screen.