Implantable Cardiac Device Coordination for Baroreflex Therapy
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Solution Overview
Problem
Implantable medical devices face challenges in coordinating cardiac pacing, arrhythmia detection, and baroreflex activation therapy, leading to potential improper defibrillation and pacemaker inhibition due to misinterpretation of electrical impulses from baroreflex activation therapy.
Innovation Solution
An implantable medical device with a processor that coordinates defibrillation, pacing, and baroreflex activation therapy, using a defibrillation lead, pacemaker lead, and carotid sinus stimulator lead, and includes a computer program product to analyze electrical impulses and prevent misinterpretation, ensuring proper device function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If baroreflex activation therapy is delivered using an implantable medical device, then heart failure management is improved, but electrical impulses from baroreflex activation may be misinterpreted as cardiac arrhythmias leading to improper defibrillation
Solution Approach 1:
The device performs preliminary actions by detecting when baroreflex activation therapy is being delivered and proactively adjusting sensing parameters before misinterpretation can occur. The processor identifies the delivery of baroreflex activation therapy and preemptively modifies arrhythmia detection thresholds to prevent false arrhythmia detection during therapy delivery.
Solution Approach 2:
The device implements feedback by continuously monitoring electrical impulses and adjusting its interpretation based on the state of baroreflex activation therapy delivery. The processor uses feedback from therapy delivery status to dynamically modify sensing parameters, ensuring that electrical impulses from baroreflex activation are correctly identified as non-arrhythmia signals.
2Reliability
If baroreflex activation therapy is delivered using an implantable medical device, then heart failure management is improved, but pacemaker activity may be improperly inhibited due to misinterpretation of electrical impulses
Solution Approach 1:
The device performs preliminary actions by detecting when baroreflex activation therapy is being delivered and proactively adjusting pacing inhibition parameters before misinterpretation can occur. The processor identifies the delivery of baroreflex activation therapy and preemptively modifies pacing detection thresholds to prevent false pacing inhibition during therapy delivery.
Solution Approach 2:
The device implements feedback by continuously monitoring electrical impulses and adjusting pacing inhibition based on the state of baroreflex activation therapy delivery. The processor uses feedback from therapy delivery status to dynamically modify pacing sensing parameters, ensuring that electrical impulses from baroreflex activation do not trigger inappropriate pacing inhibition.
3Adaptability or versatility
If separate ICD and baroreflex activation systems are implanted, then treatment options for heart failure are expanded, but device complexity and coordination challenges increase
Solution Approach 1:
The patent merges previously separate ICD and baroreflex activation systems into a single integrated implantable medical device. The device combines defibrillation capability, pacing functionality, and baroreflex activation therapy delivery within one system, eliminating the need for coordination between separate devices and reducing overall system complexity.
Solution Approach 2:
The device achieves universality by incorporating multiple functions into a single implantable medical device. It can deliver defibrillation therapy, provide pacing, administer baroreflex activation therapy, and coordinate these functions based on detected physiological conditions, replacing the need for multiple separate specialized devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively coordinates cardiac therapies, preventing improper defibrillation and pacemaker inhibition, thereby enhancing heart health management in patients with heart failure and reducing morbidity and mortality risks.
Implementation Method 1
An implantable medical device is configured to defibrillate a patient's heart... delivers an electric shock pulse to terminate a detected tachyarrhythmia episode. The electric shock pulse depolarizes portions of the myocardium
Implementation Method 2
In a normal heart, the sinoatrial node, the heart's predominant natural pacemaker, generates electrical impulses that propagate through an electrical conduction system
Implementation Method 3
Targeted stimulation of baroreceptors in the carotid sinus of HF patients can lead to decreases in sympathetic tone... The carotid baroreceptors are generally found throughout this area
Implementation Method 4
These components are generally made of specialized cells embedded in the walls of blood vessels that create action potentials at an increased rate as the cell is stretched
Data Source
AI summary
An implantable medical device configured to be planted within a subject. The medical device comprises: a first unit configured to detect pulses and output a first pulse to perform a first treatment; a second unit configured to output a second pulse to perform a second treatment; and_a control unit electrically connected to the first unit and the second unit. The control unit is configured to monitor activities of the first unit and the second unit. The control unit is also configured to prevent the first unit from mistakenly outputting the first pulses or failing to output the first pulses when a first body part of the subject needs the first pulses for the first treatment.