PEP Exhaust Valve Pressure Threshold Adjustment
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Solution Overview
Problem
Current manual resuscitation bags face difficulties in conveniently setting a desired pressure threshold for the PEP exhaust valve, as existing designs require rescuers to tilt their heads to read side-mounted pressure markings, leading to discomfort and potential parallax errors.
Innovation Solution
A manual resuscitation bag with a PEP exhaust valve featuring a rotatable member and pressure adjusting means, including a support member with markings, allows for easy setting of pressure thresholds through a readable window, enabling quick and safe pressure adjustments without head tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pressure markings are positioned laterally on the valve body, then the PEP exhaust valve can be integrated into the conduit element, but the rescuer must tilt his head to read the markings which is uncomfortable and may result in parallax issues
Solution Approach 1:
The pressure markings are repositioned from a lateral orientation on the valve body to a frontal orientation on the rotatable member. This dimensional change allows the markings to be viewed directly at eye level when the rotatable member is rotated to align the desired pressure value with the reading window, eliminating the need for head tilting and parallax errors while maintaining valve integration
2Device complexity
If pressure markings are positioned laterally on the valve body, then the valve structure is simplified, but reading the markings requires head tilting which leads to parallax errors
Solution Approach 1:
A reading window is introduced as an intermediary element between the pressure markings and the rescuer's view. The reading window, positioned on the rotatable member, allows the rescuer to read the pressure markings directly at eye level when the desired value is rotated into alignment, eliminating parallax errors while maintaining a simple valve structure
Solution Approach 2:
The pressure markings are repositioned from a lateral orientation on the valve body to a frontal orientation on the rotatable member. This dimensional change allows the markings to be viewed directly at eye level when the rotatable member is rotated to align the desired pressure value with the reading window, eliminating the need for head tilting and parallax errors while maintaining valve integration
3Ease of operation
If a rotatable member with reading window is added, then pressure threshold setting becomes accurate and comfortable, but the device complexity increases
Solution Approach 1:
The rotatable member serves multiple functions: it acts as the pressure adjustment mechanism by rotating the piston rod, serves as the display interface with the reading window showing pressure markings, and provides the adjustment means itself through its rotational movement. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving accurate and comfortable pressure setting
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 facilitates convenient, accurate, and comfortable setting of pressure thresholds, reducing the risk of parallax errors and improving user experience during resuscitation procedures.
Implementation Method 1
a spring element (9), arranged around a piston rod (7), which exerts a mechanical action on the piston head (8)
Data Source
AI summary
The invention concerns a manual resuscitation bag having a first PEP exhaust valve (4) arranged in a first conduit element (3) and fluidly communicating with the ambient atmosphere for venting gas to the atmosphere when the gas pressure, into the first conduit element (3), exceeds a given pressure threshold. The first PEP exhaust valve (4) has a valve body (5) and a calibration mechanism (6, 12; 7-10) for setting a desired pressure threshold. The calibration mechanism (6, 12; 7-10) is a rotatable member (6), actuatable by a user, arranged on the valve body (5) and cooperating with a pressure adjusting device (7-10) arranged into the valve body (5), and a support member (12) comprising several markings (11) corresponding to several settable pressure values, arranged between the rotatable member (6) and the valve body (5).