Adjustable Sedation Device Housing for Dead Space Control
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Solution Overview
Problem
Current sedation devices face challenges in reducing deadspace volume without increasing air resistance or compromising the reflection of heat, moisture, and volatile sedatives, particularly in accommodating patients of different lung capacities, and are costly to produce in various sizes.
Innovation Solution
The sedation device incorporates adjustable inserts within its housing to vary the internal deadspace volume, minimizing flow resistance while maintaining effective reflection of heat and volatile sedatives, and can be adapted for different patients without requiring multiple device sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the deadspace volume is reduced to minimize CO2 rebreathing, then patient safety is improved, but air resistance increases making it difficult for patients to exhale
Solution Approach 1:
The housing is divided into multiple chambers (ventilator chamber, patient chamber, and intermediate chamber) separated by filters. This segmentation allows the deadspace volume to be reduced while maintaining adequate airflow pathways, preventing both CO2 rebreathing and excessive air resistance by creating optimized flow paths through the segmented structure.
2Ease of manufacture
If the sedation device is made in a single size to reduce manufacturing costs, then production efficiency is improved, but adaptability to different patient lung capacities deteriorates
Solution Approach 1:
The device incorporates adjustable components including removable filters of different resistance levels and adjustable evaporator positions that can be configured to adjust the effective deadspace volume. This dynamic adjustability allows a single device size to adapt to different patient lung capacities while maintaining optimal performance.
Solution Approach 2:
The device allows modification of key parameters such as deadspace volume, airflow resistance, and sedative delivery rate through interchangeable filters and adjustable components. These parameter changes enable the same physical device to be optimized for different patient populations without requiring multiple device sizes.
3Volume of moving object
If the filter size is reduced to decrease device size, then device compactness is improved, but the ability to reflect heat, moisture, and volatile sedatives deteriorates
Solution Approach 1:
The filter incorporates composite materials with both filtration and thermal reflection properties. This allows the filter to maintain adequate heat, moisture, and volatile sedative reflection capabilities in a more compact form factor by using materials that provide multiple functions simultaneously.
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 allows for optimal treatment of patients with varying lung capacities by adjusting the deadspace volume while maintaining air flow efficiency and reducing manufacturing costs by eliminating the need for multiple device sizes.
Implementation Method 1
Different absorbent or reflective media can be used in the filter to reflect additional exhalants, such as volatile anaesthetics or sedatives, back to the patient
Implementation Method 2
filters of different media can also serve to retain the moisture exhaled by the patient and, during the inhalation phase of the cycle, return the moisture to the patient
Data Source
AI summary
A sedation device (1) has a housing (2) having a ventilator chamber (3) and an associated patient chamber (4) in communication with the ventilator chamber (3). A filter (5) is mounted between the ventilator chamber (3) and the patient chamber (4) and forms a common gas-permeable dividing wall between the ventilator chamber (3) and the patient chamber (4). An inlet port (6) is provided on the ventilator chamber (3) for connection via a Y-piece to a ventilator. An outlet port (9) of the patient chamber (4) connects via a patient breathing tube (10) with a patient. An associated pair of inserts are provided, namely a first insert (14) fixedly mounted in the ventilator chamber (3) and a second insert (15) fixedly mounted in the patient chamber (4). One or both of these inserts (14, 15) are mounted within the housing (2) to vary the internal volume of the housing (2) as required to suit different patients. The inserts (14, 15) are nestably engageable with an inner wall of the housing (2).