摘要:
The invention relates to a device for indicating that an electrode cable (2) is correctly connected to an implant (1) for emitting electrical pulses, the implant (1) by being equipped with a connection part (3) for the electrode cable's proximal end (11). The indication device contains a contact means (9) for electrically seating the proximal end (11) of the electrode cable and an indication means (10), the contact means (9) electrically causing the indication means (10) to emit at least one indication signal (18) which is perceptible outside the implant (1) when the electrode cable (2) is correctly attached to the implant (1).
摘要:
A defibrillator/monitor (10) is disclosed employing a motion detection circuit 18 and control and processing circuit (20) that cooperatively detect motion at a patient-electrode interface. In that regard, an impedance measurement circuit (24) produces an output indicative of the impedance of the interface. This output is then processed by a number of filter elements before being analyzed by a motion detection routine (52). The motion detection routine includes subroutines (62 and 64) that compare the impedance against distinct upper and lower limits and then monitor the time at which the signal is above and below the limits. Basically, motion is indicated if the signal undergoes relatively large variations for a short time, or smaller variations for a longer time. A third motion clear subroutine (66) is used to determine when motion is no longer detected. Finally, a similar scheme (102) is employed to quickly restore the various filter elements after saturation.
摘要:
Die Defibrillation eines Herzens erfolgt in bekannter Weise dadurch, daß eine Ladekapazität über eine steuerbare Schalteinrichtung mit im Bereich des Herzens angeordneten Elektroden verbunden wird und dabei über das Herzgewebe entladen wird. Um dabei den Anfangsstrom auf einen unschädlichen Wert zu begrenzen, weist die steuerbare Schalteinrichtung (10) zwei Kontakte (25,29) auf, zwischen denen ein unter der Einwirkung eines elektromechanischen Wandlers (25,33) deformierbares Schaltstück (32), beispielsweise ein Quecksilbertropfen, in der Weise angeordnet ist, daß das Schaltstück (32) bei einer vorgegebenen Auslenkung des elektromechanischen Wandlers (25,33) die beiden Kontakte (25,29) miteinander verbindet und bei einer von der vorgegebenen Auslenkung ausgehenden Änderung der Auslenkung den elektrischen Widerstand zwischen den Kontakten (25,29) verändert. Die Ansteuerung der steuerbaren Schalteinrichtung (10) erfolgt durch Einschaltimpulse mit einer zum Einstellen des gewünschten elektrischen Widerstands zwischen den Kontakten (25,29) veränderbaren Impulshöhe.
摘要:
An energy transfer circuit (40) for delivering a cardiac defibrillation pulse to a patient (50). An energy storage capacitor (16) is coupled to a pair of electrodes (52a, 52b) through an electronic switch (42). The electronic switch is controlled by a control circuit (20). A current shunt 56 is connected in parallel with a pair of defibrillation electrodes (52a, 52b) to divert a leakage current that flows through the electronic switch away from the patient when a defibrillation pulse is not being delivered. A current sensor (64) or a voltage sensor (72) provide a feedback signal to the control circuit to regulate the energy of the defibrillation pulse that flows through the patient.
摘要:
A defibrillator for applying a high voltage, with which a high-voltage capacitor circuit (2) is charged through electrodes (4) to a body of a patient. The high-voltage capacitor circuit (2) comprises metallized plastic film capacitors. A charge abnormality detecting circuit (5) is provided for detecting a dielectric breakdown of the capacitor circuit (2). A notifier (6) indicates any abnormality in response to a detection signal of the detecting circuit (5). A switch circuit (1a) inhibits, in response to the detection signal, further supply of high voltage from a high-voltage generating circuit (1).
摘要:
Methods and apparatuses are provided for neutral drive feedback loop compensation of detected electrosurgical unit signals. An apparatus includes an electrosurgery unit (ESU) signal detection circuit, a compensation switch, and an ESU filter switch. Both switches activate based on an output of the ESU signal detection circuit. A neutral drive feedback loop circuit is configured to compensate for a phase change characteristic of an ESU filter circuit.
摘要:
In an example, an apparatus is described that includes an implantable housing, a heart signal sensing circuit configured to sense intrinsic electrical heart signals, a ventricular tachyarrhythmia (VT) detector circuit, operatively coupled to the heart signal sensing circuit, the detector circuit operable to detect a VT based on the sensed heart signals, a processor configured to control delivery of an anti-tachyarrhythmia pacing (ATP) therapy based on the detected VT, and an energy delivery circuit configured to deliver the ATP therapy in response to the detected VT, wherein the apparatus does not include a shock circuit capable of delivering a therapeutically-effective cardioverting or defibrillating shock.
摘要:
To provide a medical apparatus capable of appropriately reporting an abnormal state to the user. An indicator 9 outputs whether an AED 1 is in an abnormal state. A power supply control unit 8 controls the AED 1. A monitoring unit 15 detects an operation abnormality in the power supply control unit 8. The power supply control unit 8 performs the operation monitoring of the monitoring unit 15 and, when detecting an operation abnormality, causes the indicator 9 to output an abnormal state. The monitoring unit 15 performs the operation monitoring of the power supply control unit 8 and, when detecting an operation abnormality, causes the indicator 9 to output an abnormal state.
摘要:
A wearable therapeutic device to facilitate care of a subject is provided. The wearable therapeutic device can include a garment having a sensing electrode. The garment includes at least one of an inductive element and a capacitive element, and a controller identifies an inductance of the inductive element or a capacitance of the capacitive element, and determines a confidence level of information received from the sensing electrode based on the inductance or the capacitance. The wearable therapeutic device also includes an alarm module coupled with the controller and configured to provide a notification to a subject based on the confidence level.
摘要:
Disclosed is a method for the diagnosis of conductor anomalies, such as an insulation failure resulting in a short circuit, in an implantable medical device, such as an implantable cardioverter defibrillator (ICD). Upon determining if a specific defibrillation pathway is shorted, the method excludes the one electrode from the defibrillation circuit, delivering defibrillation current only between functioning defibrillation electrodes. Protection can be provided against a short in the right-ventricular coil-CAN defibrillation pathway of a pectoral, transvenous ICD with a dual-coil defibrillation lead. If a short caused by an in-pocket abrasion is present, the CAN is excluded from the defibrillation circuit, delivering defibrillation current only between the right -ventricular and superior vena cava defibrillation coils. Determination that the defibrillation pathway is shorted may be made by conventional low current measurements or delivery of high current extremely short test pulses.