Pulsatile Inhaled Nitric Oxide Dosing to Limit NO2 Exposure
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Solution Overview
Problem
Inhaled nitric oxide (NO) can be toxic when not administered correctly, forming nitrogen dioxide (NO2) which poses health risks, and existing methods lack precise delivery techniques to maximize therapeutic benefits while minimizing side effects in patients with lung diseases.
Innovation Solution
Administering inhaled nitric oxide (iNO) in a pulsatile manner based on a patient's breath pattern, calculating the timing of administration using an algorithm, and delivering it over a portion of the inspiratory time to improve activity levels in patients with interstitial lung disease (ILD).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inhaled nitric oxide is administered continuously or without precise timing, then therapeutic benefits are maximized, but nitrogen dioxide formation increases causing toxicity
Solution Approach 1:
The patent applies periodic action by delivering nitric oxide in pulsatile bursts synchronized with the patient's breath pattern rather than continuous administration. The system detects breath patterns and triggers NO delivery during specific phases of inspiration, creating periodic dosing that maintains therapeutic levels while allowing clearance periods that reduce NO2 accumulation and toxicity.
Solution Approach 2:
The system employs feedback by continuously monitoring the patient's breath pattern and using this information to control the timing and delivery of nitric oxide. The breath detection system provides real-time feedback that adjusts the pulsatile delivery timing, ensuring optimal therapeutic delivery while minimizing conditions that lead to harmful NO2 formation.
2Device complexity
If inhaled nitric oxide is administered without breath pattern synchronization, then device complexity is reduced, but delivery precision decreases leading to reduced therapeutic benefit
Solution Approach 1:
The system applies self-service by using the patient's own breath pattern as the trigger signal for drug delivery. The breath detection system automatically senses the patient's respiratory rhythm and autonomously controls the timing of NO pulses without requiring external intervention or complex programming, allowing the patient's physiology to drive the delivery system.
Solution Approach 2:
The patent replaces complex mechanical timing mechanisms with a sensor-based breath detection system. Instead of using mechanical clocks or timers to control delivery timing, the system uses electronic sensors to detect breath patterns and electronically controls the valve timing, substituting mechanical complexity with sensor-based control that is more precise and adaptive.
3Quantity of substance
If inhaled nitric oxide is delivered over the entire inspiratory time, then total dose delivery is maximized, but peak concentration increases causing side effects
Solution Approach 1:
The patent applies segmentation by dividing the total nitric oxide dose into multiple smaller pulsatile deliveries rather than administering it as a single continuous flow. Each pulse delivers a portion of the total dose during specific phases of inspiration, distributing the substance delivery over time and reducing peak concentrations while maintaining cumulative therapeutic exposure.
Solution Approach 2:
By delivering nitric oxide in periodic pulses rather than continuous flow, the system maintains the total therapeutic dose while creating intervals between deliveries that allow for gas mixing and diffusion, preventing dangerous peak concentrations and associated side effects.
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
This method enhances therapeutic efficacy by reducing NO2 exposure, minimizing side effects, and improving activity levels in patients with ILD, including idiopathic pulmonary fibrosis (IPF) and pulmonary hypertension.
Implementation Method 1
Nitric oxide (NO) is a gas that, when inhaled, acts to dilate blood vessels in the lungs, improving oxygenation of the blood and reducing pulmonary hypertension
Implementation Method 2
NO reacts with oxygen to form nitrogen dioxide (NO2)
Data Source
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AI summary
Described are methods for maintaining or improving activity levels in patients lung-related conditions.