Manual Resuscitator Volume Selector Mechanism

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Solution Overview

Problem

Current resuscitators lack consistency in air volume delivery due to dependence on user force and require multiple size bladder assemblies, making them cumbersome and difficult to use in emergency situations.

Innovation Solution

A resuscitator design featuring a volume selector mechanism with indexed positions for infant, child, and adult settings, allowing for one-handed adjustments to ensure precise air delivery, compact storage, and reduced complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple size bladder assemblies are used to accommodate different patient sizes, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to different patient sizesVSAvoidnumber of bladder assemblies

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The bladder assembly incorporates an adjustable stroke mechanism that allows dynamic modification of the compression stroke length. This enables a single bladder assembly to adapt to different patient sizes (infant, child, adult) by adjusting the stroke parameter, eliminating the need for multiple fixed-size bladders and reducing device complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the stroke parameter of the bladder assembly to accommodate different patient sizes. By adjusting the stroke length, the same bladder assembly can deliver appropriate air volumes for infants, children, and adults, thereby maintaining adaptability while reducing the number of components needed.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If force-dependent air delivery is used, then ease of operation is improved, but manufacturing precision deteriorates

Engineering Contradiction:

Improveease of squeezingVSAvoidconsistency of air volume delivery

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The adjustable stroke mechanism dynamically controls the compression distance, ensuring consistent air volume delivery regardless of the force applied by the user. This maintains manufacturing precision by decoupling the output consistency from the input force variability, while preserving ease of operation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The indexed positions provide tactile feedback to the user, ensuring that the stroke is set to the correct predetermined value. This feedback mechanism guarantees consistent air volume delivery by preventing incorrect stroke settings, thereby maintaining manufacturing precision while keeping the device easy to operate.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If elongated leg member is used for volume adjustment, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvevolume adjustabilityVSAvoidmechanical configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The stroke adjustment mechanism allows dynamic change of the compression stroke length through indexed positions. This provides volume adaptability for different patient sizes while using a compact mechanical design that does not require elongated components, thereby reducing device complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The adjustment mechanism is integrated within the existing bladder assembly structure, with the stroke adjustment component nested within the housing. This compact nesting approach provides volume adjustability without requiring external elongated members, reducing overall device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

4Adaptability or versatility

If string and ball system is used for height adjustment, then adaptability is improved, but ease of operation deteriorates

Engineering Contradiction:

Improvevolume adjustment capabilityVSAvoidease of volume adjustment

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The stroke mechanism provides dynamic volume adjustment through predetermined indexed positions that can be selected with one hand. This maintains adaptability for different patient sizes while significantly improving ease of operation compared to complex string and ball systems.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The indexed positions are designed to be easily selectable by the user without requiring complex manipulation. The mechanism serves itself by providing clear tactile cues for correct positioning, enabling quick one-handed adjustment and improving ease of operation while maintaining adaptability.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8936024B2Manual emergency resuscitator with pre-defined volume control

Publication Date: 2015.01.20 PEARCE RICHARD S

AI summary

A manual emergency resuscitator uses a volume control system having pre-defined setting to accommodate patients of different sizes. An upper plate 305 is attached to a front hinge assembly 103 and a lower housing assembly is attached to the front hinge assembly. The lower housing assembly defines the lower portions of an accordion chamber 206. A selection void 300 is defined within the upper plate 305, with the selection void further defined by voids indexed to a closed position, infant position, child position and an adult position. A volume selector cord 201 has a first end attached to a volume selector, with the volume selector contained within the selection void. Placing the volume selector into one of the predefined positions regulates the amount of air delivered by the resuscitator.