Shielded Prefilled Syringe Injector for Manual Needle Control
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Solution Overview
Problem
Many patients fear needle injections, leading to non-compliance with injectable therapies, which affects healthcare providers and pharmaceutical companies.
Innovation Solution
A pre-filled syringe safety device with a manually actuated injector that allows users to control the injection process, featuring a tube that shields the needle before and after use, and a mechanism to lock the needle in an extended position, ensuring the needle is not exposed until injection is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional syringe and needle is used, then the injection can be administered, but the patient experiences fear and anxiety due to exposed needle
Solution Approach 1:
The needle is nested within a shield tube that can be extended or retracted. When the shield tube is extended, it covers the needle completely, hiding it from the patient's view and reducing fear. The nested structure allows the needle to be both protected during storage and exposure during injection without requiring separate components.
Solution Approach 2:
The shield tube acts as an intermediary between the needle and the patient. It provides a psychological barrier by covering the needle, reducing the patient's fear response. The shield tube is manipulated by the patient or administrator, giving control over the exposure timing and reducing anxiety about the injection process.
2Object-affected harmful factors
If an auto-injector is used, then the needle fear is mitigated by enclosure, but some patients still fear the abrupt needle stab
Solution Approach 1:
The shield tube is designed to be dynamically extendable and retractable during the injection process. It starts in a retracted position allowing needle exposure for injection, then extends to cover the needle afterward. This dynamic behavior gives the patient control over the injection timing while still providing protection, combining manual control with safety.
Solution Approach 2:
The shield tube is pre-positioned to cover the needle before injection. The patient or administrator manually extends or retracts it at the appropriate time, providing a controlled transition rather than an abrupt automatic needle exposure. This preliminary positioning reduces shock and fear by allowing mental preparation.
3Ease of operation
If the needle is exposed for manual injection control, then patient compliance improves, but safety risk increases due to potential accidental sticks
Solution Approach 1:
The needle is nested within the shield tube structure, allowing it to be both accessible for controlled injection and protected when not in use. The nested design ensures the needle cannot accidentally expose itself, as it remains enclosed within the tube until deliberately positioned for injection.
Solution Approach 2:
The device includes self-shielding features where the shield tube automatically returns to a protective position after injection, and the needle remains covered during storage and transport. The system provides its own safety mechanism without requiring additional protective steps from the user, reducing accidental exposure risks while maintaining manual control during the actual injection.
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
Enhances patient compliance with injectable therapies by reducing fear of needle injections, providing a controlled and shielded injection process.
Implementation Method 1
The biasing member may be engaged with the cartridge and the tube so as to bias the tube in the extended state
Data Source
AI summary
A prefilled syringe safety device and injector for use with a syringe. The prefilled syringe safety device and injector includes a cartridge, a casing, a tube, a biasing member, a ring and a plunger slider. The cartridge supports the syringe therein. The cartridge is supported within the casing. The tube includes a tube distal end. The tube is slidably engaged with the cartridge and can be in an extended state and in a retracted state. When in the retracted state, the needle of the syringe extends beyond the tube distal end and the casing distal opening. The biasing member is engaged with the cartridge and the tube to bias the tube in the extended state. The ring includes a protrusion and is engaged with the tube and the biasing member. The protrusion is positioned within the track. The plunger slider engages with the plunger of the syringe.