Carotid Sinus Nerve Stimulation for Hypertension
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Solution Overview
Problem
Current medical devices for treating hypertension and heart failure, such as carotid artery stimulation, have been ineffective for a significant subset of patients, leading to millions suffering from untreatable high blood pressure and related cardiovascular consequences.
Innovation Solution
A system for stimulating carotid sinus and vagus nerves using multipolar electrodes and a programmable pulse generator, which adjusts stimulation parameters based on the patient's heart rate and activity level, to effectively manage hypertension and heart failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carotid artery stimulation is used to treat hypertension, then blood pressure control is attempted, but effectiveness is poor for a significant subset of patients
Solution Approach 1:
The patent segments the carotid sinus nerve into distinct fascicles (sensory and motor) and selectively stimulates only the sensory fascicle. This segmentation allows the device to target the specific neural pathway responsible for blood pressure regulation while avoiding stimulation of motor fibers, thereby improving treatment effectiveness and reducing side effects that limited previous approaches.
Solution Approach 2:
The patent applies local quality by using directional electrodes positioned to stimulate only the sensory fascicle of the carotid sinus nerve at a specific location. The electrode configuration and stimulation parameters are optimized for the local anatomical structure, creating focused neural activation that improves reliability while maintaining broad patient applicability.
2Reliability
If radiofrequency energy is applied to destroy nerves surrounding arteries, then treatment is attempted, but effectiveness has not been proven
Solution Approach 1:
The patent replaces the thermal/mechanical destruction approach (radiofrequency energy) with electrical stimulation. Instead of destroying neural tissue through heat, the device uses controlled electrical pulses to modulate nerve activity. This substitution maintains treatment effectiveness while reducing procedural complexity and improving safety.
3Reliability
If implantable stimulators are used to stimulate baroreceptors, then hypertension treatment is attempted, but effectiveness remains unproven
Solution Approach 1:
The patent implements dynamic stimulation by adjusting electrical pulse parameters (amplitude, width, frequency) based on real-time physiological feedback and patient response. The stimulation regimen is customized and adaptable to individual patient needs, improving effectiveness while managing device complexity through intelligent control algorithms.
Solution Approach 2:
The patent optimizes stimulation parameters specifically for sensory fascicle activation, using parameter ranges and waveforms tailored to elicit the desired baroreflex response. By carefully controlling electrical parameters, the device achieves reliable blood pressure control while keeping the stimulation system manageable in complexity.
Data Source
AI summary
Methods and systems for stimulating nerve fibers to treat a condition in a patient are disclosed herein. Such methods can include stimulating, via an electrode device, afferent fibers associated with baroreceptors and/or a carotid sinus nerve of a patient; sensing a heart rate of the patient; and adjusting a stimulation frequency of the afferent fibers based on the sensed heart rate. The heart rate can be indicative of an activity level of the patient, and an increase in the sensed heart rate can cause an increase in the stimulation frequency.