Syringe Barrel Segmented Scales for Precise API Dosing
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Solution Overview
Problem
Current syringes for administering liquid medications are prone to errors due to complex calculations required for accurate dosing, especially for medications with narrow therapeutic indices, leading to risks of under/overdosing.
Innovation Solution
Syringes with easy-to-read graduated scales on the barrel indicating fine-increment API weight dosages, API strength, and volumetric dimensions, allowing for precise and accurate measurement and administration of API weight dosages without the need for complex calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If complex graduated scales with multiple columns are used to indicate patient weight, liquid volume, and API weight, then dosing information is provided, but the scales become confusing and difficult to read
Solution Approach 1:
The syringe barrel is divided into multiple circumferential zones, each containing a single graduated scale for a specific API concentration. This segmentation allows users to select the appropriate zone based on the medication being administered, eliminating the confusion of trying to read multiple overlapping scales simultaneously while still providing comprehensive dosing information for various concentrations.
2Adaptability or versatility
If multiple columns of graduated markings are used to indicate different dosing parameters, then comprehensive dosing information is available, but the arrangement becomes densely packed and difficult to interpret
Solution Approach 1:
Instead of arranging multiple graduated scales in a single linear dimension along the barrel length, the invention distributes them across multiple circumferential zones around the barrel. This dimensional transition from linear to radial arrangement allows multiple scales to coexist without overlapping, maintaining dosing flexibility while reducing visual complexity and improving interpretability.
3Measurement precision
If calculations are required to determine the volume of liquid medication to achieve a desired API dosage, then dosing accuracy can be achieved, but the risk of calculation errors increases
Solution Approach 1:
The syringe barrel automatically performs the conversion from API dosage to liquid volume by providing separate graduated scales calibrated for different API concentrations. Users simply read the volume directly from the appropriate scale corresponding to their medication's concentration, eliminating the need for manual calculations and reducing the risk of calculation errors while maintaining dosing accuracy.
4Loss of information
If redundant information is provided on both the barrel and plunger in different formats, then complete dosing information is available, but confusion arises about whether the markings indicate the same or different information
Solution Approach 1:
The graduated scales are positioned at specific local zones on the barrel, with each zone dedicated to a particular API concentration. This local specialization allows users to quickly identify and use only the relevant scale for their medication, avoiding confusion from redundant information in different formats while ensuring complete dosing information is available for various concentrations.
Data Source
AI summary
Embodiments of this invention provide syringes calibrated for use with a predetermined liquid medication having an active pharmaceutical ingredient (API) at a particular weight per unit volume (w/v) concentration. Such syringes comprising a plunger and a barrel are configured such that the plunger, and/or an end portion of the plunger, is sealingly receivable through an opening at one end the barrel and within the barrel and slidingly moveable lengthwise within the barrel. This configuration allows formation of a reservoir inside the barrel into which the liquid medication may be loaded through an intake opening for the liquid medication at the other end of the barrel. Syringe barrels according to this invention possess line increments that form two or more graduated scales of API weight dosages extending lengthwise along the barrels. The increment lines provide for highly precise and accurate measurement of fine-increment weight dosages of the API.