12 results about "Phrenic nerve stimulation" patented technology

A system and method for targeted stimulation with a tracheal phrenic nerve stimulation device that can include: performing an initialization routine of a stimulation module that determines a set of stimulation parameters, the initialization routine comprises: cycling through electrode groupings, detecting a response in a respiratory signal for each electrode grouping, and determining a select electrode grouping as part of the stimulation parameters; and operating a stimulation module using the set of stimulation parameters.

The disclosure relates to a computer-implemented method for monitoring diaphragmatic response to phrenic nerve stimulation. The method comprises receiving in real-time a diaphragmatic CMAP signal. The method comprises computing a baseline value of a characteristic of the CMAP signal. The characteristic represents a diaphragmatic response intensity to a phrenic nerve stimulation. The method comprises determining a threshold value of the characteristic, representing a boundary of values of the characteristic indicative of upcoming diaphragmatic palsy. The determining of the threshold value includes shifting the baseline value. The method comprises receiving in real-time a ECG signal. The method comprises repeating in real-time: detecting a QRS complex in the ECG signal, monitoring the CMAP signal, computing a real-time value of the characteristic, comparing the real-time value to the threshold value, and outputting an alert when the threshold is passed. The real-time value of the characteristic is asynchronous to the QRS complex.

Examples of the disclosure include an implantable system comprising principal stimulation circuitry configured to provide electrical stimulation to a phrenic nerve via at least one phrenic nerve stimulation electrode, subordinate stimulation circuitry configured to provide electrical stimulation to an upper-airway nerve via at least one upper-airway-nerve stimulation electrode, at least one respiration sensor, and an implantable pulse generator (IPG) comprising the stimulation circuitries and at least one processor configured to cause the subordinate stimulation circuitry to deliver stimulation in an absence of delivery of the phrenic nerve stimulation, monitor a signal from the respiration sensor(s), identify a respiration reduction based on the signal during the stimulation delivery, and in response thereto, cause the stimulation circuitries to deliver the stimulations concurrently based in part on the respiration signal and control a timing of delivery of the upper- airway-nerve electrical stimulation relative to a timing of delivery of the phrenic nerve electrical stimulation.

A two-piece electrode cuff to stimulate a nerve is provided. The cuff is arranged to adapt it to the natural form of the nerve as well as to the surrounding tissues. The shape of the electrode cuff is optimized for ease of placement and it assures that the device will remain in place without major displacement and will minimize the damage to the nerve post-implant.

A system and method for targeted stimulation with a tracheal phrenic nerve stimulation device that can include: performing an initialization routine of a stimulation module that determines a set of stimulation parameters, the initialization routine comprises: cycling through electrode groupings, detecting a response in a respiratory signal for each electrode grouping, and determining a select electrode grouping as part of the stimulation parameters; and operating a stimulation module using the set of stimulation parameters.

The present invention discloses a phrenic nerve stimulation device, which is applied to the field of nerve stimulation. The processor in the phrenic nerve stimulation device determines the diaphragmatic muscle state of the user, controls the electrical stimulation module in the phrenic nerve stimulation device to generate a stimulation action on the diaphragmatic muscle with abnormal state of the user according to the diaphragmatic muscle state; judges whether the diaphragmatic muscle state of the user after the stimulation action is in a normal state; when the diaphragmatic muscle state after the stimulation action is in a normal state, maintains the stimulation action and returns to the step of determining the diaphragmatic muscle state of the user; when the diaphragmatic muscle state after the stimulation action is not in a normal state, adjusts the stimulation action and returns to the step of determining the diaphragmatic muscle state of the user. By confirming the diaphragmatic muscle state of the user and then performing corresponding stimulation actions on the diaphragmatic muscle in abnormal state, and at the same time determining whether the diaphragmatic muscle returns to the normal state after stimulation during the stimulation process, and adjusting the stimulation action in time according to the feedback of the diaphragmatic muscle state after stimulation, the possibility of harm to the user is reduced.

Systems and methods for automatic detection of phrenic nerve stimulation are disclosed. A plurality of pacing pulses are delivered between an associated pair of electrodes of a plurality of electrodes. For each of the plurality of pacing pulses, a corresponding diaphragm movement during delivery of the pacing pulse is measured. For each of the plurality of pacing pulses, it is determined, based on the corresponding measured diaphragm movement, whether the pacing pulse results in phrenic nerve capture. For each pacing pulse that results in phrenic nerve capture, the pair of electrodes associated with that pacing pulse is recorded.

The invention provides a closed-loop transtracheal phrenic nerve stimulation control system and a method thereof, the closed-loop transtracheal phrenic nerve stimulation control system is characterized by comprising a control unit, a stimulation generator, a tail end electrode and a detection unit, the control unit drives the stimulation generator to generate stimulation current, the stimulation current stimulates a diaphragm through the tail end electrode, and the detection unit detects the diaphragm. The detection unit detects electromyographic signals of the diaphragm through the tail end electrode, the control unit receives and processes the electromyographic signals in real time and dynamically adjusts stimulation current parameters according to a preset algorithm, and therefore closed-loop regulation and control are achieved; the control unit is in communication connection with the respirator to ensure synchronization of electrode stimulation and autonomous respiration. The invention has the advantages that: a closed-loop feedback control strategy is adopted, through the tail end electrode integrating stimulation and detection functions, accurate electrical stimulation of diaphragm and real-time monitoring of electromyographic signals (EMG) are realized, the system integration level is improved, and the implantation burden is reduced.

Aspects of this disclosure describe methods and systems for evaluating phrenic nerve stimulation based on acoustics. A stimulation lead, for pacing the phrenic nerve(s), and an acoustic sensor, for detecting sounds or vibrations, may be placed in a patient. The stimulation lead may stimulate phrenic nerve(s) to cause movement of the diaphragm, resulting in an associated acoustic signal. The acoustic sensor may detect the acoustic signal associated with the diaphragm movement. Other acoustics may be detected by the acoustic sensor, such as heart sounds. The portion of the acoustic signal associated with diaphragm movement may be identified for analysis of the phrenic nerve stimulation. Stimulation parameters of the phrenic nerve stimulation may be modified or adjusted accordingly.

A delivery tool configured to surgically position an electrode assembly on a patient's anterior scalene muscle and phrenic nerve, the delivery tool including: an electrode carrying portion comprising a receiving space with at least one aperture in a floor of the receiving space, the receiving space being configured to hold an electrode assembly; a lead carrying portion extending from the electrode carrying portion, the lead carrying portion being configured to hold a lead connected to the electrode assembly; and a securing device configured to hold the electrode assembly in place relative to a stimulation target when the delivery tool is inserted into a patient's body, the securing device being further configured to allow the electrode to be repositioned after the electrode assembly has been held in place by the securing device.

The utility model relates to the technical field of diaphragm pacemakers, and discloses a patch type diaphragm pacemaker guided by diaphragm ultrasound, which comprises a host, a sensor and an electrode slice, the sensor and the electrode slice are arranged outside the host, and an ultrasound imaging module, a diaphragm function evaluation module, a diaphragm pacing control module and an interactive display module are arranged in the host. The sensor is connected with the ultrasonic imaging module, the ultrasonic imaging module and the diaphragm pacing control module are both connected with the interactive display module and the diaphragm function evaluation module, and the electrode slice is connected with the diaphragm pacing control module. According to the utility model, through integrating the diaphragm ultrasound and the external diaphragm pacemaker, the external phrenic nerve stimulation level can be fed back and adjusted in real time under reliable and continuous diaphragm ultrasound monitoring, the diaphragm electrical stimulation efficiency is improved, and the effect of individually adjusting the diaphragm electrical stimulation level according to each patient is achieved.

This application relates to an endotracheal intubation assembly with a stimulation stent and its method of use. The spherical mesh structure of the stimulation stent, with the elastic support of the elastic tube, drives the stimulation electrode to be uniformly and stably attached to the tracheal wall, effectively avoiding poor contact of the stimulation electrode caused by changes in patient position or slight movement of the endotracheal tube. The entire device integrates the stimulation stent, stimulation electrode, catheter, and endotracheal tube into a single integrated design through an extension tube, eliminating the need for a separate stimulation device after endotracheal tube insertion. This significantly simplifies the clinical procedure, reduces the risk of mucosal damage and infection caused by additional tube placement, and ensures reliable contact between the stimulation electrode and the tracheal wall as the stimulation stent is stably deployed, guaranteeing continuous and stable transmission and action of the electrical stimulation signal, and significantly improving the accuracy and consistency of phrenic nerve stimulation.