306 results about "Hearts lungs" patented technology

An isolated heart or heart-lung preparation in which essentially normal pumping activity of all four chambers of the heart is preserved, allowing for the use of the preparation in conjunction with investigations of electrode leads, catheters, ablation methods, cardiac implants and other medical devices intended to be used in or on a beating heart. The system can be designed to be used within a Magnetic Resonance Imaging (MRI) unit or a X-ray computed tomography (CT) scanner. The preparation may also be employed to investigate heart and lung functions, in the presence or absence of such medical devices. In order to allow comparative imaging visualizations of either or simultaneously the heart and/or lung structures and devices located within the chambers of the heart or vessels or bronchi within the lungs, a clear perfusate such as a modified Krebs buffer solution with oxygenation is circulated through all four chambers of the heart and thus the coronary and/or pulmonary vasculatures. A ventilator with intubation tube can be used to inflate/deflate the lungs and/or provide oxygen to the isolated organs. The preparation and recordings of the preparation may be used in conjunction with the design, development and evaluation of devices for use in or on the heart and/or lungs, as well as for use as an investigational and teaching aid to assist physicians and students in understanding the operation of the cardiopulmonary system.

The invention relates to a heart rate variability biofeedback exercise systematic method, comprising a set of autonomic nervous cardiopulmonary system regulation state and harmonicity metrics and a method of guiding a trainee into harmonious state. A heart rate variability biofeedback exercise apparatus of the invention collects heart rate and respiratory signals of the trainee in real time, analyzes and computes the autonomic nervous cardiopulmonary system regulation state and harmonicity metrics of the trainee, and guides the trainee to regulate mood and respiration to the harmonious state. A heart rate variability biofeedback exercise is effective in regulating autonomic nervous regulation state, thus lowering cardiopulmonary system risk; is effective in relieving competition mental stress, thus increasing the score. Therefore the method and apparatus are significant to keeping people healthy and improving living quality.

Methods and systems for sensing a physiological characteristic of a subject. At least one receiver antenna can be provided in proximity to a portion of the subject's body to obtain at least one receiver signal resulting from at least one transmitter signal that has propagated to the receiver antenna and has been reflected, diffracted, scattered, or transmitted by or through the portion of the subject's body. One or more coherent signal pairs can be formed. Then, amplitude and phase information of a plurality of frequency components for each signal pair can be determined. A set of comparison values can be determined for each signal pair by comparing respective frequency component phases and respective frequency component amplitudes of the signals. Physiological characteristics of the subject can then be determined from these comparison values.

Provided is a training box that is a practice tool for learning heart massaging (sternal compression) through experience; is low-cost, small-sized, light weight, and easy to transport; retains durability under repeated use; and on which AED use procedures can also be drilled. The portable practice tool for heart massaging in cardiopulmonary resuscitation is characterized by being provided with a chest-mockup main unit (1) having a thickness that is thicker than a thickness equivalent to the depth of chest cavity subsidence required during heart massaging (sternal compression), in which a palm-sized opening (3) in the center of the chest-mockup main unit (1) is opened in a vertical direction; a closed-cell synthetic resin foam (6a), which is covered by a bag (6d), contracts and expands in a vertical direction, and has a cavity (7) in the interior, is provided in said opening as a pressing part (6) that is moveable in the vertical direction; and a valve (8), which is for both the entrance and exit of air to the abovementioned cavity (7) and the detection thereof, is disposed on a side of the bag (6d).

The invention discloses a cardiopulmonary resuscitation first-aid device for an emergency department. The cardiopulmonary resuscitation first-aid device comprises a lying plate, wherein a supporting table is arranged at the bottom of the lying plate; a supporting frame is arranged on the left side of the top of the lying plate; and a transverse rod is fixedly mounted at the top of the right side of the supporting frame. According to the cardiopulmonary resuscitation first-aid device disclosed by the invention, a three-dimensional chest pressing mode is adopted and force is uniformly distributed to the whole chest through a pressing bag; on one hand, downward longitudinal pressing force is formed; meanwhile, a chest wall is extruded to trigger and enhance breathing and circulation, so thatcontinuous, stable and effective chest compression is realized; especially, chest compression and breathing assistance of a patient are orderly, synchronously and alternately carried out, and the device is more regular and has a better utilization effect; compared with previous various cardiopulmonary resuscitation devices, the cardiopulmonary resuscitation first-aid device has better breathing and circulation driving effects; an extending or retracting stroke of an electric retractable device is sufficiently utilized, the power consumption is lower and resource wastes are reduced; and the cardiopulmonary resuscitation first-aid device has high portability and is convenient to move and use.

The invention relates to a method and a system for identifying heart-lung sound signals. The method includes the steps of acquiring heart/lung sounds initial detection signals, acquiring correspondingenvironment sound signals, and subjecting the heart/lung sounds initial detection signals to differential noise reduction processing, so as to prevent the influence of the peripheral environment on the cardio-pulmonary sound signals, prevent influence of signals irrelevant to the cardio-pulmonary sound signals on the identification precision, and effectively improve the collection and identification precision of the cardio-pulmonary sound signals. The heart sound simulation signals is processed through combination of EMD (Empirial Mode Decomposition) and a high-order shannon entropy algorithm, and a wavelet decomposition is used for processing the lung sound digital signals. Accurate recognition of the characteristics of the heart sound signals and the lung sound signals is achieved, andthe identification steps of the cardio-pulmonary sound signals are effectively simplified. The real-time performance is higher, and the cost is low.

A wearable cardiac defibrillator (“WCD”) system may include a support structure that a patient can wear, an energy storage module that can store an electrical charge, and a discharge circuit that can discharge the electrical charge through the patient so as to shock him or her, while the patient is wearing the support structure. Embodiments may actively take into account bystanders, both to protect them from an inadvertent shock, and also to enlist their help. In some embodiments the WCD system includes a speaker system that transmits a sound designed to assist a bystander to perform CPR. Optionally CPR chest compressions received by the patient can be further detected, and feedback can be given. In embodiments, a WCD system may include a user interface that can be controlled to output CPR prompts tailored to a skill level of the bystander.

Medical devices, plug-ins, systems, and methods for CPR quality feedback are disclosed. The medical devices can calculate peripheral circulation relevant parameters based on measured signals containing at least partial hemodynamic characteristics. Amplitude and area characteristics included in the peripheral circulation relevant parameters can further be determined for providing feedback and control relating to CPR quality during the compression process. Also, compression interruption during CPR can be evaluated based on a pulse waveform generated from the measured signals.

The invention discloses a non-negative matrix factorization-based heart and lung sound separation method. The method comprises the steps of firstly filtering a mixed signal of heart and lung sounds in a time domain to obtain a priori heart sound signal and a priori lung sound signal; secondly performing short-time Fourier transform and sparse non-negative matrix factorization on the priori heart sound signal and the priori lung sound signal; and finally obtaining a basis matrix of the mixed signal. The sparse non-negative matrix factorization process is equivalent to a learning process of the basis matrix, and has a clustering effect; the basis matrix can be mined effectively from the priori heart sound signal and the priori lung sound signal; and a heart sound signal and a lung sound signal are accurately separated from the mixed signal of the heart and lung sounds in the time domain according to the basis matrix in the subsequent steps. The invention furthermore discloses a non-negative matrix factorization-based heart and lung sound separation apparatus, which has the abovementioned beneficial effects.

The invention discloses an AED scheduling management system and an AED scheduling management method. According to the invention, patients, volunteers and AEDs are subjected to unified management; whena patient calls for help, a plurality of volunteers and AEDs closest to the patient can be found, and navigation information can be provided, such that the volunteers and the AEDs can reach the position of the patient in the shortest time so as to improve the success rate of the treatment; particularly in the case of the multiple volunteers, the first volunteer can be instructed to directly reachthe position of the patient to perform cardiopulmonary resuscitation so as to temporarily maintain the brain and heart circulation functions, and the second volunteer is notified to take the AED, andthen goes to the position of the patient so as to get the most rescue time for the patient; and the system has advantages of automated operation, unattended mode, intelligent scheduling and efficientoperation.

The invention discloses a portable audio-visual feedback device and method for cardio-pulmonary resuscitation. The device comprises an insulation covering blanket, a compressor and an audio-visual feedback device unit; the insulation covering blanket is used for insulating current generated when a defibrillator administers an electric shock; a displacement sensor is installed in the compressor, and is used for measuring external chest compression depth, and transmitting data to the audio-visual feedback device unit; the audio-visual feedback device unit includes a control circuit, a storage module and an output module; and the control circuit is used for receiving the data and comparing the compression depth with a standard threshold value in the storage module, and if the compression depth exceeds the set threshold value, a corresponding adjustment command is given by the output module. According to the device and the method, accurate cardio-pulmonary resuscitation guidance is more efficiently given to rescuers participating in sudden cardiac arrest rescue, and thus, sustained cardio-pulmonary resuscitation is guaranteed, the resuscitation success rate is increased, the life safety of the rescuers is guaranteed, the personal privacy of female patients is protected, and corresponding warm keeping measures are provided for patients in low-temperature weather.

The invention provides an adaptive cardiopulmonary resuscitation chest external pressing device, which effectively solves the problems of complicated operation, difficult control of pressing depth, limited adaptability, inability to automatically adjust pressing depth according to different individuals, influence on pressing efficiency and quality, and delay of rescue time in the prior art. The technical scheme is as follows: the device comprises a flat plate, wherein a transverse plate is arranged on the lower side of the flat plate; a supporting rod is arranged on the lower end surface of the flat plate; a long gear is arranged on the lower side of the flat plate; a rotary drum penetrates through the flat plate; a rotary shaft is arranged in the rotary drum; a disc-shaped gear is arranged on the right side of the long gear; a press rod penetrate through the transverse plate; a pressing block is fixed to the lower end of the press rod; a boss is arranged at the upper end of the pressrod; a convex block is arranged on the lower end surface of the disc-shaped gear; a transverse rod is arranged at the upper part of the right end of the transverse plate; a cylinder is arranged at theleft end of the transverse rod; a vertical rod is arranged in the cylinder; an inclined plate is arranged on the transverse plate; a sliding groove is formed in the inclined plate; and a wedge-shapedbulge is arranged on the transverse rod.