43 results about "Cardiac impulses" patented technology

An electrical lead system includes a shaft to which a series of expandable ring electrodes are attached that follows the contour of the vascular or muscular structures of the heart, such as cardiac veins, arteries, atrial appendages and trabeculae, and provides sensing of electrical cardiac impulses, pacing and high voltage shock or defibrillation. The lead system uses a variety of energy sources to stimulate the heart, such as ultrasound, electromagnetic and electric impulses.

A method for determining cardiac impulse conduction, in particular three-dimensional cardiac impulse conduction, in a patient, comprising: generating an image recording of an area of the body of the patient capturing at least partially electrocardiogram electrodes arranged on the body of the patient by an imaging modality; determining positions of the electrocardiogram electrodes in a system of coordinates assigned to the imaging modality; recording of potential data of some of the electrocardiogram electrodes; and reconstructing cardiac impulse conduction depending on the determined positions of the electrocardiogram electrodes, the image recording and the recording of potential data of the electrocardiogram electrodes, wherein at least one image recording is generated substantially simultaneously with the recording of potential data of the electrocardiogram electrodes or is generated in the period between two recordings of potential data of the electrocardiogram electrodes.

The dynamic detection sensing equipment for sleep attitude of human body under the natural state is characterized by that several contact pressure sensors are arranged into long strip and fixed on the polyimide thin sheet to form sensing band, in the gap between contact pressure sensors the temperature sensor is set. It can be placed on the position under the body of upper chest of the person to be detected, and the sensing band is fixed on the whole width of cotton-padded mattress, and spread on the bed. Said invention can record and analyze various physiological parameters of sleeping state, such as sleep attitude, cardiac impulse, respiration, body temp. And various life state informations of sleep staging, slap apnea and nervi autonomicus function, etc.

The invention provides a non-invasive blood pressure measuring device and a measuring method thereof. In the device, a main machine is provided with a microprocessor connected with an air pressure sensor; a pressurizing band is an inflatable sac-shaped band with air tubes, is connected with the air pressure sensor, is tied on a limb where the flowing of arterial blood of a measured person can be completely blocked after inflation, and is provided with a pulse wave detector which is fixed at a downstream position of the pressurizing band in the arterial blood flowing direction; and the microprocessor processes a plurality of pulse wave amplitudes detected by the pulse wave detector in the gradual increasing process from zero and corresponding pressurizing band pressure thereof in real timeso as to determine the systolic pressure, and processes a plurality of pulse delay time in the process from variation to relative invariant of the delay time between the pulse wave and the corresponding pressure AC signal in real time so as to determine the diastolic pressure. The device converts discontinuous events to continuous measurement, avoids unavoidable possible errors caused by the discontinuity of cardiac impulse, and can accurately and non-invasively measure the systolic pressure and the diastolic pressure in blood pressure.

The invention relates to the technical field of sleep monitoring, in particular to a heart rate and respiratory rate monitoring method and monitoring device thereof, a blanket and a mattress. The method comprises the steps: collecting a swing signal, caused by heartbeat and respiration, of an elastic part on the condition of lying on the elastic part by a human body; converting the acquired swingsignal into an angular velocity signal; converting the angular velocity signal into a frequency domain signal; acquiring a frequency value corresponding to a maximum value of the frequency domain signal in a preset respiratory rate range, namely the respiratory rate; and acquiring a frequency value corresponding to the maximum value of the frequency domain signal in a preset heart rate range, namely the heart rate. According to the invention, when a person lies down, a longitudinal impact is generated on the human body at the moment of cardiac impulse according to the heart BCG principle; thelying position swings up and down due to the change of the gravity center; the cardiac beat signal is converted into the angular velocity signal by collecting the swing signal and the angular velocitysignal is converted into the heart rate signal, so that the monitoring of the heart rate and the respiratory rate is completed.

The invention discloses a tumor microvessel self-assembly generation system. The system comprises a tumor microsphere column and a pulsation system; the tumor microsphere column comprises a perfusion column and tumor microspheres located in the perfusion column, and the two ends of the perfusion column are each provided with a micropore filter membrane; the pulsation system comprises a peristaltic pump, a pulse piston pump, a rotating culture support, a liquid storage bottle, an oxygenator, a filter and a buffer bottle; the perfusion column, the liquid storage bottle, the oxygenator and the buffer bottle are sequentially communicated end to end to form a circulating channel. In the working process, the peristaltic pump is started to start to conduct perfusion, a fluid in the buffer bottle forms fluid circulating through a first pulse pipeline, when the pulse piston pump conducts extraction operation, more fluids can swarm into the perfusion column in a pulsed mode to form a pulsed fluid to pass through the perfusion column, then a pulsed fluid caused by cardiac impulse is simulated, and fluid flow and fluid shear force are applied to the tumor microspheres in the perfusion column; oxygen is supplied and carbon dioxide is removed by combining the oxygenator which simulates a lung air exchange device, and then occurrence of the tumor microvessels in a body is finally simulated.