Automated Drug Dispensing System with HME Bypass for Ventilators
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Solution Overview
Problem
Current mechanical ventilation systems require manual administration of aerosol medications, which is inefficient and can increase healthcare costs and reduce patient safety.
Innovation Solution
An automated drug dispensing system integrated into ventilator circuits with a heat and moisture exchanger (HME) that allows for the controlled and automated delivery of aerosol medications without interrupting the respiratory path, using a bypass flow path and electromechanical valves to ensure medication is delivered directly to the patient during inhalation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual administration of aerosol medications is used, then the system structure remains simple, but healthcare costs increase and patient safety decreases
Solution Approach 1:
The automated medication dispensing system is integrated directly into the ventilator housing, merging two separate functions (ventilation and medication administration) into a single unified device. This eliminates the need for separate manual administration procedures while maintaining manageable system complexity through functional integration.
Solution Approach 2:
The ventilator system is designed to perform multiple functions: providing mechanical ventilation and automatically administering aerosol medications. The housing serves as both the ventilator enclosure and the medication dispensing platform, allowing a single device to fulfill multiple therapeutic needs.
2Reliability
If automated drug dispensing is integrated into the ventilator circuit, then medication delivery consistency improves, but the risk of compromising the respiratory path increases
Solution Approach 1:
The internal medication dispensing mechanism is divided into separate functional zones: a medication storage chamber, a dispensing nozzle positioned in the inhalation flow path, and a bypass valve system. This segmentation allows the medication delivery function to operate independently without interfering with the main respiratory pathway, ensuring consistent medication delivery while protecting patient safety.
Solution Approach 2:
A bypass valve acts as an intermediary mechanism that controls the flow path. When medication needs to be administered, the bypass valve diverts a portion of the inhalation flow through the medication dispensing mechanism and then returns it to the main respiratory path. This intermediary control ensures that medication delivery does not compromise the primary respiratory function.
3Productivity
If a bypass flow path is used for medication delivery, then medication can be delivered during inhalation without interrupting the respiratory path, but the device complexity increases
Solution Approach 1:
The bypass flow path and medication dispensing mechanism are nested within the existing ventilator housing structure. The bypass valve and associated tubing are integrated into the housing's internal architecture, allowing the additional functionality to be accommodated without proportionally increasing external device complexity. The medication dispensing system is essentially nested within the ventilator's existing flow path.
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 system enables efficient and safe automated medication administration to mechanically ventilated patients, reducing healthcare costs and improving patient safety by ensuring consistent and timely delivery of medications without compromising the respiratory path.
Implementation Method 1
Heat and moisture exchanger (HME) media or heat and moisture exchanger (HME) media in the respiratory path
Implementation Method 2
bypass valve in communication with the bypass flow path and configured to redirect the flow of breathable gas
Implementation Method 3
aerosol medicines are aspirated in situ through an access point in the ventilator system
Data Source
AI summary
Dispensing systems for a ventilator circuit having a ventilator flow circuit with a normal inhalation flow path with a heat and moisture exchanger (HME), a flow sensor in communication with the ventilator circuit, an automated drug dispensing system with an actuator and a pressurized canister residing upstream of the HME, a bypass inhalation flow path residing downstream of the pressurized canister, and at least one electromechanical valve residing in the inhalation flow path to selectively open the valve which can be normally closed to define a closed bypass path. At least one controller opens the at least one electromechanical valve to open the bypass inhalation flow path and close the normal inhalation flow path through the HME only when the flow sensor indicates air flow is in an inhalation direction. Once the valve is open, the actuator dispenses medication through the bypass inhalation flow path to the patient.