Grip Accessory for Manual Injection Device with Depth Control
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Solution Overview
Problem
Current needle safety devices for manual injection devices are complex, require two hands to operate, and can cause anxiety for patients and caregivers due to exposed needles, with inconsistent needle insertion depth and potential for accidental needle sticks.
Innovation Solution
A grip accessory for manual injection devices that provides a single-handed, easy-to-use solution with a housing design that limits needle insertion depth, incorporates a skin contacting surface to control needle insertion, and includes features like a flared opening and inner sheath to reduce anxiety and prevent accidental needle exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a needle safety device is used to protect healthcare providers from accidental needle sticks, then safety is improved, but device complexity increases and requires additional activation steps
Solution Approach 1:
The patent extracts the safety function from a complex multi-component device and integrates it into a simple grip accessory that limits needle exposure. The grip accessory is a standalone component that can be used with any manual injection device, separating the safety function from the injection device itself while maintaining simplicity.
Solution Approach 2:
The grip accessory serves as an intermediary between the user and the needle, providing a physical barrier that limits needle exposure. It acts as a mediator that controls the interface between the injection device and the user's hand, preventing accidental needle sticks without requiring complex activation mechanisms.
2Reliability
If a needle safety device with automatic coverage is used, then needle safety is improved, but device complexity and cost increase
Solution Approach 1:
The grip accessory is designed to be self-limiting in its needle exposure control. The physical structure of the grip inherently limits how far the needle can extend beyond the skin surface, providing passive safety without requiring active control systems or complex mechanisms.
3Manufacturing precision
If proper injection technique with skin pinching is required, then injection accuracy is improved, but ease of operation decreases and requires two hands
Solution Approach 1:
The grip accessory pre-positions the needle relative to the skin surface, establishing the correct injection depth before the injection begins. The flared opening and skin contacting surface create a predetermined geometric relationship that guides proper needle insertion without requiring the user to perform skin pinching or angle adjustments during the procedure.
4Ease of operation
If the needle is exposed for injection, then ease of needle insertion is improved, but patient anxiety increases and accidental needle sticks occur
Solution Approach 1:
The grip accessory provides localized coverage, exposing only the specific portion of the needle needed for injection while concealing other parts. The flared opening allows the needle to be visible and accessible at the injection site, while the body of the grip accessory shields the rest of the needle, reducing patient anxiety without compromising insertion ease.
Data Source
AI summary
A grip accessory for a manual injection device comprises a housing comprising a generally hollow body configured to support a manual injection device therein. The housing comprises a distal portion comprising a first opening into which a manual injection device can be inserted, a proximal portion having a second opening through which the needle of the manual injection device extends. The proximal portion comprises a skin contacting surface at a proximal end of the device that can be placed against an injection site. An intermediate portion extends between the proximal and distal portions.