Intraosseous Access Shielded Stylet Retraction for Sharp Safety
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Solution Overview
Problem
Existing intraosseous access devices pose safety hazards due to sharp components that can injure clinicians during setup, use, or disposal, despite incorporating safety features that may fail or be bypassed.
Innovation Solution
Intraosseous access devices featuring a barrel, motor, slide carrier, rotating stylet assembly, handle, and safety mechanisms like a shield and spring for controlled retraction, ensuring safe operation and preventing accidental exposure to sharp components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety features are incorporated into intraosseous access devices, then user safety is improved, but device complexity increases
Solution Approach 1:
The device is divided into distinct functional modules: a barrel assembly containing the stylet, a motor assembly, a slide carrier mechanism, and a shield assembly. Each module can be independently analyzed and manufactured, allowing complex safety features to be integrated without overwhelming the overall design. The shield assembly specifically segments the sharp stylet from the user interface, providing safety through physical separation.
Solution Approach 2:
The shield is nested within the barrel assembly and can move between retracted and extended positions. The slide carrier is nested within the barrel and carries the shield assembly. This nested structure allows multiple safety and functional components to be integrated in a compact configuration, managing device complexity through hierarchical organization rather than additive complexity.
2Strength
If sharp penetrating components are used to breach cortical bone, then penetration capability is improved, but safety hazard increases
Solution Approach 1:
The sharp stylet is extracted from direct user contact by enclosing it within the barrel and shield assembly. The stylet remains sharp for effective bone penetration, but the shield acts as an intermediary barrier that prevents user exposure to the sharp component during setup, operation, and disposal.
Solution Approach 2:
The shield serves as an intermediary component between the sharp stylet and the user. It allows the stylet to maintain its sharp penetrating capability while the shield absorbs the safety function, blocking direct contact with the hazardous sharp component during all phases of device use.
3Reliability
If protective shields are added to cover sharp components, then safety is improved, but ease of operation may be worsened
Solution Approach 1:
The shield is designed as a dynamic component that can move between retracted and extended positions along the barrel axis. During operation, the shield retracts to allow stylet deployment and bone penetration. After use, the shield extends to cover and protect the stylet. This dynamic behavior allows the device to adapt its configuration based on operational phase, maintaining ease of operation during critical moments while providing protection during handling.
Solution Approach 2:
The shield is pre-positioned in a retracted state during setup, allowing the stylet to be deployed without obstruction. The automatic or manual retraction mechanism is prepared in advance, so when the stylet needs to be used, the shield is already in the correct position. After the procedure, the shield is preliminarily positioned to extend and protect the stylet before disposal or storage.
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 devices provide enhanced safety by preventing unintended actuation and exposure to sharp parts, improving user safety and operational accuracy through controlled retraction and secure handling.
Implementation Method 1
a spring disposed within the barrel
Data Source
AI summary
The disclosure relates to an intraosseous access device comprising a barrel, a motor, a slide carrier, a rotating stylet assembly, and a handle. The rotating stylet assembly is actuated through the barrel with the slide carrier and rotated by the motor. Elements of the rotating stylet assembly may rotate through the cortex of a bone. The drill may also comprise a shield disposed within the barrel, a slide interface both disposed within a slide channel and attached to the slide carrier, a spring disposed within the barrel, and a removable pivot body attached to both the handle and the barrel.