Dosage Control Syringe with Adjustable Lock Member
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Solution Overview
Problem
Administering precise drug or fluid dosages with syringes can be challenging, especially in high-stress environments, as it requires complex calculations and accurate manipulation to avoid overdosing or underdosing patients.
Innovation Solution
A dosage control syringe featuring an adjustable lock member that can be preset along a track or guide, limiting the plunger's travel to prevent excessive fluid administration, allowing for accurate dosing without visual monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual monitoring and complex calculations are required to administer proper dosage, then measurement precision is improved, but ease of operation deteriorates and loss of time increases
Solution Approach 1:
The lock member is pre-positioned at a specific location along the track corresponding to the desired dosage before the plunger is pushed. This preliminary positioning eliminates the need for real-time visual monitoring and calculations during administration, as the dosage limit has already been predetermined and mechanically set.
Solution Approach 2:
The lock member acts as an intermediary mechanical element between the plunger and the desired dosage volume. It physically blocks the plunger's travel path at the predetermined dosage point, serving as a mechanical mediator that translates the abstract concept of dosage into a concrete physical stop, eliminating the need for visual monitoring.
2Measurement precision
If visual monitoring is required during plunger movement, then measurement precision is improved, but reliability deteriorates in high-stress environments
Solution Approach 1:
The syringe system performs self-monitoring through the mechanical lock member that automatically stops plunger travel at the predetermined dosage point. The system serves itself by having the lock member physically block further plunger movement, eliminating the need for external visual monitoring and reducing human error in high-stress environments.
Solution Approach 2:
The lock member provides a mechanical safety buffer by being pre-positioned to stop plunger travel before the full plunger stroke is completed. This beforehand positioning acts as a protective measure that prevents overdose even if the operator loses visual contact or becomes distracted during administration.
3Measurement precision
If complex calculations are required for dosage determination, then measurement precision is improved, but productivity deteriorates
Solution Approach 1:
The desired dosage is pre-calculated and the lock member is pre-positioned at the corresponding location on the track before the administration process begins. This eliminates the need for complex calculations during the actual administration, allowing for rapid deployment in emergency situations while maintaining dosage accuracy.
Solution Approach 2:
The complex calculation process is extracted from the administration moment and performed beforehand. The lock member is positioned at the predetermined dosage location, removing the need for real-time mathematical computations during patient treatment, thus accelerating the administration process while maintaining precision.
Data Source
AI summary
A dosage control syringe includes a barrel, a plunger, an adjustable lock member supported along a guide (such as a track) that is disposed along or outside an outer wall of the syringe barrel, and a stop member coupled to the plunger or the lock member. The stop member is generally aligned between the adjustable lock member and a portion of the plunger so as to limit or preclude further movement of the plunger upon engagement of the stop member with both the lock member and the plunger. The plunger is stopped by the lock member, via the stop member, when the plunger has traveled a predetermined distance set by the lock member, the distance corresponding to a desired dosage of fluid from the syringe.