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69 results about "Phrenic nerve" patented technology

The phrenic nerve is a nerve that originates in the neck (C3–C5) and passes down between the lung and heart to reach the diaphragm. It takes its name from the Ancient Greek phren, meaning diaphragm. It is important for breathing, as it passes motor information to the diaphragm and receives sensory information from it. There are two phrenic nerves, a left and a right one.

Method and device for electronically controlling the beating of a heart using venous electrical stimulation of nerve fibers

An electro-stimulation device includes a pair of electrodes for connection to at least one location in the body that affects or regulates the heartbeat. The electro-stimulation device both electrically arrests the heartbeat and stimulates the heartbeat. A pair of electrodes are provided for connection to at least one location in the body that affects or regulates the heartbeat. The pair of electrodes may be connected to an intravenous catheter for transvenous stimulation of the appropriate nerve. A first switch is connected between a power supply and the electrodes for selectively supplying current from the power supply to the electrodes to augment any natural stimuli to the heart and thereby stop the heart from beating. A second switch is connected between the power supply and the electrodes for selectively supplying current from the power supply to the electrodes to provide an artificial stimulus to initiate heartbeating. In another aspect, the invention is directed to a method for arresting the beat of a heart in a living body comprising the steps of connecting the pair of electrodes to at least one location in the body that affects or regulates the heartbeat and supplying an electrical current to the electrodes of sufficient amplitude and duration to arrest the heartbeat. The device may also serve to still the lungs by input to a respirator or by stimulation of the phrenic nerve during surgical procedures.
Owner:MEDTRONIC INC

Method and device for electronically controlling the beating of a heart

An electro-stimulation device includes a pair of electrodes for connection to at least one location in the body that affects or regulates the heartbeat. The electro-stimulation device both electrically arrests the heartbeat and stimulates the heartbeat. A pair of electrodes are provided for connection to at least one location in the body that affects or regulates the heartbeat. The pair of electrodes may be connected to an intravenous catheter for transvenous stimulation of the appropriate nerve. A first switch is connected between a power supply and the electrodes for selectively supplying current from the power supply to the electrodes to augment any natural stimuli to the heart and thereby stop the heart from beating. A second switch is connected between the power supply and the electrodes for selectively supplying current from the power supply to the electrodes to provide an artificial stimulus to initiate heartbeating. In another aspect, the invention is directed to a method for arresting the beat of a heart in a living body comprising the steps of connecting the pair of electrodes to at least one location in the body that affects or regulates the heartbeat and supplying an electrical current to the electrodes of sufficient amplitude and duration to arrest the heartbeat. The device may also serve to still the lungs by input to a respirator or by stimulation of the phrenic nerve during surgical procedures.
Owner:MEDTRONIC INC

Method and Apparatus for Phrenic Stimulation Detection

Approaches for characterizing a phrenic stimulation threshold, a cardiac capture threshold, a maximum device parameter, and a minimum device parameter are described. A plurality of cardiac pacing pulses can be delivered by using a cardiac pacing device, a pacing parameter of the plurality of cardiac pacing pulses being changed between delivery of at least some of the pulses. One or more sensor signals can be evaluated to detect stimulation of the phrenic nerve by one or more of the plurality of cardiac pacing pluses. The evaluation of the one or more sensor signals and the pacing parameter can be compared to determine if a phrenic stimulation threshold is at least one of higher than a maximum device parameter and lower than a minimum device parameter.
Owner:CARDIAC PACEMAKERS INC

Method and device for electronically controlling the beating of a heart

An electro-stimulation device includes a pair of electrodes for connection to at least one location in the body that affects or regulates the heartbeat. The electro-stimulation device both electrically arrests the heartbeat and stimulates the heartbeat. A pair of electrodes are provided for connection to at least one location in the body that affects or regulates the heartbeat. The pair of electrodes may be connected to an intravenous catheter for transvenous stimulation of the appropriate nerve. A first switch is connected between a power supply and the electrodes for selectively supplying current from the power supply to the electrodes to augment any natural stimuli to the heart and thereby stop the heart from beating. A second switch is connected between the power supply and the electrodes for selectively supplying current from the power supply to the electrodes to provide an artificial stimulus to initiate heartbeating. In another aspect, the invention is directed to a method for arresting the beat of a heart in a living body comprising the steps of connecting the pair of electrodes to at least one location in the body that affects or regulates the heartbeat and supplying an electrical current to the electrodes of sufficient amplitude and duration to arrest the heartbeat. The device may also serve to still the lungs by input to a respirator or by stimulation of the phrenic nerve during surgical procedures.
Owner:MEDTRONIC INC

System and method for applying therapy during hyperpnea phase of periodic breathing using an implantable medical device

InactiveUS7082331B1Reducing cyclic blood chemistry imbalanceReduce ventilationElectrotherapyCheyne–Stokes respirationTreatment typology
Techniques are provided for treating periodic breathing, such as Cheyne-Stokes Respiration, using an implantable medical system. In one technique, diaphragmatic stimulation is delivered during a hyperpnea phase of periodic breathing via electrical stimulation of the phrenic nerves. Diaphragmatic stimulation is synchronized with intrinsic inspiration so as to increase the amplitude of diaphragmatic contraction during inspiration. This tends to decrease intrathoracic pressure leading to occlusion of the respiratory airway. Occlusion reduces actual ventilation during hyperpnea, thus reducing the cyclic blood chemistry imbalance that sustains periodic breathing so as to either mitigate periodic breathing or eliminate it completely. In another technique, respiration is instead inhibited during the hyperpnea phase of periodic breathing by blocking phrenic nerve signals to the extent necessary to reduce ventilation to terminate periodic breathing or at least mitigate its severity. Techniques are also described for controlling the type of therapy applied in response to periodic breathing.
Owner:PACESETTER INC

Systems and Methods for Ranking and Selection of Pacing Vectors

Approaches to rank potential left ventricular (LV) pacing vectors are described. Early elimination tests are performed to determine the viability of LV cathode electrodes. Some LV cathodes are eliminated from further testing based on the early elimination tests. LV cathodes identified as viable cathodes are tested further. Viable LV cathode electrodes are tested for hemodynamic efficacy. Cardiac capture and phrenic nerve activation thresholds are then measured for potential LV pacing vectors comprising a viable LV cathode electrode and an anode electrode. The potential LV pacing vectors are ranked based on one or more of the hemodynamic efficacy of the LV cathodes, the cardiac capture thresholds, and the phrenic nerve activation thresholds.
Owner:CARDIAC PACEMAKERS INC

Device and method for controlling breathing

InactiveUS20060149334A1Reduce generationIncreasing functional residual capacityElectrotherapyElectromyographyControlled breathingBreathing process
A device and method is provided for controlling breathing of a subject by electrically stimulating tissue associated with the diaphragm or phrenic nerve of the subject.
Owner:RMX

Device and method for increasing functional residual capacity

ActiveUS20060122662A1Reduce generationIncreasing functional residual capacityElectrotherapyElectromyographyElectricityIncreased functional residual capacity
A device and method is provided for increasing the functional residual capacity of lungs of a subject by electrically stimulating tissue associated with the diaphragm or phrenic nerve of the subject.
Owner:RMX

Implantable Devices And Methods For Stimulation Of Cardiac And Other Tissues

An implantable system is provided for stimulation of the heart, phrenic nerve, or other tissue structures accessible via a patient's airway. The stimulation system includes an implantable controller housing which includes a pulse generator; at least one electrical lead attachable to said pulse generator; and at least one electrode carried by the at least one electrical lead, wherein the at least one electrode is positionable and fixable at a selected position within an airway of a patient. The controller housing may be adaptable for implantation subcutaneous, or alternatively, at a selected position within the patient's trachea or bronchus, wherein the controller housing is proportioned to substantially permit airflow through the patient's airway about housing.
Owner:E PACING

System and method to modulate phrenic nerve to prevent sleep apnea

An implantable medical device for treating breathing disorders such as central sleep apnea wherein stimulation is provided to the phrenic never through a transvenous lead system with the stimulation beginning after inspiration to extend the duration of a breath and to hold the diaphragm in a contracted condition.
Owner:ZOLL RESPICARDIA INC

Device and method for biasing lung volume

ActiveUS20060155341A1Reduce generationIncreasing functional residual capacityElectrotherapyElectromyographyLung volumesRadiology
A device and method is provided for biasing lung volume by electrically stimulating tissue associated with the diaphragm or phrenic nerve at a low level.
Owner:RMX

Device and method for improving upper airway functionality

InactiveUS20060167523A1Reduce generationIncreasing functional residual capacityElectrotherapyElectromyographyAnesthesiaPhrenic nerve
A device and method is provided for improving upper airway functionality by electrically stimulating tissue associated with the diaphragm or phrenic nerve of a subject.
Owner:RMX

Capture verification in respiratory diaphragm stimulation

Improved methods and devices perform respiratory control of a person due to conditions such as sleep apnea. According to one embodiment, a respiratory control method includes delivering stimulation signals according to one or more stimulation parameters to phrenic nerves of a person. The person's chest activity is monitored, e.g., by sensing signals in a chamber of the person's heart, to determine the person's respiratory cycle. The stimulation cycle and respiratory cycle are compared. In response, the one or more stimulation parameters are adjusted. In subsequent stimulation cycle(s), the method delivers the stimulation signals according to the adjusted stimulation parameters. This feedback mechanism may continue until respiratory control is captured.
Owner:PACESETTER INC

Activity Sensor Processing for Phrenic Nerve Activation Detection

An implantable cardiac device includes a sensor for sensing patient activity and detecting phrenic nerve activation. A first filter channel attenuates first frequencies of the sensor signal to produce a first filtered output. A second filter channel attenuates second frequencies of the accelerometer signal to produce a second filtered output. Patient activity is evaluated using the first filtered output and phrenic nerve activation caused by cardiac pacing is detected using the second filtered output.
Owner:CARDIAC PACEMAKERS INC

Method and system for preventing nerve injury during a medical procedure

A method of treating tissue is provided, including positioning a stimulation device proximate a phrenic nerve; stimulating the phrenic nerve with the stimulation device; measuring a physiological response to the stimulation; defining a threshold physiological response value based at least in part on the measured physiological response; positioning a thermal treatment element proximate to an arrhythmogenic cardiac tissue region; applying a thermal treatment regimen to the cardiac tissue region with the medical device; measuring a physiological parameter during the thermal treatment regimen application; and conveying the measured physiological parameter to a controller, the controller comparing the measured physiological parameter to the defined physiological response value threshold, the controller adjusting the thermal treatment regimen in response to the comparison of the measured physiological parameter to the defined physiological response value threshold.
Owner:MEDTRONIC CRYOCATH LP

System and method for applying therapy during hyperpnea phase of periodic breathing using an implantable medical device

ActiveUS20050240240A1Reducing cyclic blood chemistry imbalanceLowering intrathoracic pressureElectrotherapyRespiratory organ evaluationCheyne–Stokes respirationTreatment typology
Techniques are provided for treating periodic breathing, such as Cheyne-Stokes Respiration, using an implantable medical system. In one technique, diaphragmatic stimulation is delivered during a hyperpnea phase of periodic breathing via electrical stimulation of the phrenic nerves. Diaphragmatic stimulation is synchronized with intrinsic inspiration so as to increase the amplitude of diaphragmatic contraction during inspiration. This tends to decrease intrathoracic pressure leading to occlusion of the respiratory airway. Occlusion reduces actual ventilation during hyperpnea, thus reducing the cyclic blood chemistry imbalance that sustains periodic breathing so as to either mitigate periodic breathing or eliminate it completely. In another technique, respiration is instead inhibited during the hyperpnea phase of periodic breathing by blocking phrenic nerve signals to the extent necessary to reduce ventilation to terminate periodic breathing or at least mitigate its severity. Techniques are also described for controlling the type of therapy applied in response to periodic breathing.
Owner:PACESETTER INC

Nerve stimulation device

A nerve stimulation device has a pulse generator for generating stimulation pulses and an output for the stimulation pulses from the pulse generator, which is connectable to an electrode arrangement adapted for interaction with a living being to stimulate the phrenic nerve. The nerve stimulation device is made more safe and effective by the provision of an input connectable to an esophageal electrode for the reception of measurement signals. The esophageal electrode is adapted to be inserted in the esophagus of the living being for obtaining measurement signals. A signal analyzer filters myo-electrical signals from the diaphragm out of the measurement signals and a regulating unit regulates the pulse generator dependent on the myo-electrical signals.
Owner:MAQUET CRITICAL CARE

System and method to modulate phrenic nerve to prevent sleep apnea

An implantable medical device for treating breathing disorders such as central sleep apnea wherein stimulation is provided to the phrenic never through a transvenous lead system with the stimulation beginning after inspiration to extend the duration of a breath and to hold the diaphragm in a contracted condition.
Owner:ZOLL RESPICARDIA INC

Intra-esophageal balloon system

A device and system are disclosed for selective inflation of an inflatable body, such as a balloon, received through an oral cavity and into the esophagus of a patient. The inflatable body is operably coupled to a pressurized fluid source. The inflatable body has a relatively flexible portion and a relatively inflexible portion. When pressurized fluid is delivered to the body to inflate the body, the flexible portion expands more than the inflexible portion, resulting in asymmetrical expansion and movement of the esophagus away from the ablation site to avoid accidental injury while performing a procedure on the patient's left atrium. This movement may be opposite from or directly away from the heart or, alternatively, may be sideways relative to the heart to a location in which the esophagus is interposed between the ablation site and the phrenic nerve. The supplied fluid may be radio-opaque liquid to allow for imaging thereof to assist in positioning the balloon. The liquid may additionally be relatively cool as compared to the patient's body temperature so serve as a heat sink against heat applied to surrounding areas.
Owner:NIAZI PATENT HLDG LLC

Devices and methods for electrical stimulation of the diaphragm and nerves

Medical devices, systems, and methods are provided for providing respiratory therapy by electrically stimulating the phrenic nerves and / or the thoracic diaphragm. In one embodiment, at least one electrode is deployed to a position within the patient's airway and placed in proximity to a phrenic nerve or to the diaphragm. The electrode may be attached to a controller housing including a pulse generator using one or more electrical lead or leads or may be in wireless communication with the pulse generator. The controller housing may be implanted at a position within the patient or the controller housing may reside external to the patient.
Owner:E PACING

Respiration Sensor Processing for Phrenic Nerve Activation Detection

An implantable cardiac device includes a sensor for sensing patient respiration and detecting phrenic nerve activation. A first filter channel attenuates first frequencies of the sensor signal to produce a first filtered output. A second filter channel attenuates second frequencies of the respiration signal to produce a second filtered output. Patient activity is evaluated using the first filtered output and phrenic nerve activation caused by cardiac pacing is detected using the second filtered output.
Owner:CARDIAC PACEMAKERS INC
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