Syringe Support Member for Nasal Injection Accuracy
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Solution Overview
Problem
During nasal surgical procedures, small, thin needles used for medication injection often deflect from the intended path due to soft tissue in the nasal cavity, making it difficult to accurately target the injection site.
Innovation Solution
A syringe assembly with an elongate support member and securing clips that attach to the syringe, providing structural rigidity to deflect soft tissue and guide the needle to the target area, allowing the needle tip to be positioned accurately for injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a thin, flexible needle is used for nasal cavity injection, then the needle can be inserted through soft tissue, but the needle deflects from the intended path due to tissue resistance
Solution Approach 1:
A support member is introduced as an intermediary component between the syringe and the needle. This support member provides structural rigidity to the assembly, enabling the needle to maintain its intended trajectory through the nasal cavity soft tissue without deflecting, while still allowing needle insertion capability
Solution Approach 2:
The syringe assembly combines components with different mechanical properties - the flexible needle for tissue penetration and the rigid support member for trajectory stability - creating a composite structure that achieves both insertability and positioning accuracy
2Measurement precision
If a rigid support structure is added to the syringe assembly, then needle trajectory is stabilized, but the device complexity increases
Solution Approach 1:
The support member is designed as a segmented or modular component that can be attached to the syringe assembly in a simplified manner, reducing the overall complexity of integrating rigid support into the flexible needle system
Solution Approach 2:
Rigidity is applied locally only where needed - in the support member that contacts and stabilizes the needle - while the needle itself remains flexible for tissue penetration. This localized application of structural support minimizes overall device complexity
Data Source
AI summary
A syringe assembly configured to urge soft tissue out of a surgical path includes a syringe, an elongate support member and a securing member. The syringe includes a barrel, a needle with a needle tip and a plunger movably mounted in the syringe barrel. The syringe defines a longitudinal axis. The elongated support member has a proximal end, a distal end and an arcuate-shaped cross-section. The securing member is fixed near the proximal end of the elongate support member. The securing member is configured to attach the elongate support member to the syringe. A support length is defined between the securing member and the distal end and a tip length is defined between the securing member and the needle tip when the support member is mounted to the syringe. The tip length is greater than the support length when the syringe assembly is in an injection configuration.