Omaha, NE, United States

West Corporation

www.west.com
Omaha, NE, United States

West Corporation is a publicly traded telecommunications services provider based in Omaha, Nebraska. Wikipedia.


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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 microphone. The WCD system might be ready to deliver a shock, but may first wait before doing so until it hears from a bystander a preset ready word, such as: CLEAR.


A wearable cardioverter defibrillator (WCD) system includes a support structure that the patient may wear, and one or more sensors that may acquire patient physiological signals, such as ECG and others. A processor of the WCD system may determine diagnostics from the patient physiological signals. These diagnostics include a six-second ECG portion, heart rates as histograms, heart rates against QRS width, heart rate trends, clinical event counters, diagnostics relating to heart rate variability and about the atrial arrhythmia burden of the patient. In some embodiments, the WCD system includes a user interface with a screen that displays these diagnostics. In some embodiments, the WCD system exports these diagnostics for viewing by a different screen. When viewed, these diagnostics permit more detailed analysis of the state of the patient.


In embodiments, a wearable cardiac defibrillator system includes an energy storage module configured to store a charge. Two electrodes can be configured to be applied to respective locations of a patient. One or more reservoirs can store one or more conductive fluids. Respective fluid deploying mechanisms can be configured to cause the fluids to be released from one or more of the reservoirs, which decreases the impedance at the patient location, and decreases discomfort for the patient. In some embodiments an impedance is sensed between the two electrodes, and the stored charge is delivered when the sensed impedance meets a discharge condition. In some embodiments, different fluids are released for different patient treatments. In some embodiments, fluid release is controlled to be in at least two doses, with an intervening pause.


In embodiments, a WCD system includes one or more transducers that may sense patient parameters from different parts of the patients body, and thus render physiological inputs from those parameters. First aspects and second aspects may be detected from the physiological inputs. An aggregated first aspect may be generated from the detected first aspects, and an aggregated second aspect may be generated from the detected second aspects. An aggregate analysis score may be determined from the aggregated first aspect and the aggregated second aspect. A shock/no shock determination may be made depending on whether or not the aggregate analysis score meets an aggregate shock criterion. Accordingly, such a WCD system can make shock/no shock determinations by aggregating aspects of multiple patient parameters. Accordingly, multiple inputs are considered in making the shock/no shock determination.


Embodiments are directed to wearable cardioverter defibrillator (WCD) systems that include patient parameter electrodes, such as ECG electrodes, that are at least substantially electrically isolated from other circuits of the WCD system. In embodiments, the WCD system includes a power source, an energy storage module, and a processor each connected to a first circuit ground. A patient parameter sense port, such as an ECG port, is coupled to the patient. A measurement circuit may render a physiological input from the sensed patient parameter received at the patient parameter sense port, and the measurement circuit includes an isolating circuit that electrically isolates the patient parameter sense port from the first circuit ground. The sensing of physiological inputs of the patient can be improved, resulting in fewer erroneous readings and false alarms.


A wearable cardioverter defibrillator (WCD) system (101) is described that includes patient parameter electrodes (114, 118), such as ECG electrodes, that are at least substantially electrically isolated from other circuits of the WCD system. The WCD system includes a power source, an energy storage module and a processor, each connected to a first circuit ground. A patient parameter sense port, such as an ECG port, is coupled to the patient. A measurement circuit is configured to render a physiological input from the sensed patient parameter received at the patient parameter sense port and includes an isolating circuit that electrically isolates the patient parameter sense port from the first circuit ground.


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, a memory and a proximity detector. Prompts have been stored in the memory. In case of an emergency, upon inferring that no bystander is nearby, the speaker system may transmit a sound at a higher intensity than otherwise, hoping to attract attention.


A wearable cardioverter defibrillator (WCD) system includes a processor, a memory, a wireless communication module (DWCM), and an NFC tag that stores information for how an accessing device may access the DWCM wirelessly. An accessing device such as a defibrillator configurator with an NFC reader may read the NFC tag of the WCD system, if it has adequate permission to do so. Upon so reading, the accessing device will know how to address the DWCM wirelessly, and thus install or update configuration data, software updates, or request memory downloads from operations. The use of the NFC tag requires close proximity, which hampers both inadvertently programming the wrong WCD system, plus a WCD system being attacked maliciously.


A medical device such as an external defibrillator delivers electrical therapy using a special pulse sequence. The special pulse sequence includes a defibrillation shock that is automatically followed by a quick succession of automatic post-shock anti-tachycardia (APSAT) pacing pulses. Because of the pacing pulses, the defibrillation shock can be of lesser energy than an equivalent defibrillation shock of a larger energy. Accordingly, the external defibrillator can be made physically smaller and weigh less, without sacrificing the therapeutic effect of a larger external defibrillator that would deliver a defibrillation shock of higher energy. As such, the defibrillator is easier to configure for transporting, handling, and even wearing.


Chattopadhyay T.,West Corporation
IEEE Journal on Selected Topics in Quantum Electronics | Year: 2012

Conventional digital circuits lose energy because the bits of information are destroyed during the operation. Reversible circuits are currently on the top approaches to power minimization with its application in all-optical-based systems. Fredkin gate is a very common reversible logic gate. In this paper, a modification of the Fredkin gate is proposed. All-optical circuit of this modified Fredkin gate (MFG) is also designed using semiconductor optical amplifier on the Mach-Zehnder interferometer switch. A 16-Boolean logical operational circuit is also shown using this MFG. The main advantage of this scheme is that we can design a 15-Boolean logical function using a single MFG unit. Only one operation (nand) required two MFG units. Hence, complexity of the circuit can be reduced. Also, multivalued T-gate circuit using MFG is proposed. © 2011 IEEE.

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