Medicament Delivery Adaptor With Mechanical Dose Stop
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Solution Overview
Problem
Existing medicament delivery systems, particularly for critically unwell neonates, lack a comprehensive system to prevent dose errors during calculation, dispensing, and administration stages, leading to a high risk of fatal overdoses due to syringe dosing inaccuracies.
Innovation Solution
An adaptor for medicament delivery devices, equipped with a movement constraint guide (MCG) that includes physical features to limit the movement of the device's activation parts, ensuring precise dosing by engaging with an engaging portion to stop the medicament draw and expulsion at the set dosage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple physical stroke limiters are used for syringes, then device complexity is reduced, but dosing precision deteriorates
Solution Approach 1:
The patent introduces a movement constraint guide (MCG) as an intermediary component between the syringe plunger and the syringe barrel. The MCG includes physical features that define the set dosage by limiting the movement distance of the plunger, thereby achieving precise dosing control without requiring complex electronic or mechanical systems. This intermediary mechanism resolves the contradiction by providing accurate dosage control through a relatively simple additive component.
2Manufacturing precision
If cloud-integrated infusion pump systems are used, then dosing precision is improved, but reliability deteriorates due to potential override without controls
Solution Approach 1:
The patent implements a self-service mechanism where the MCG automatically limits the plunger movement to the predefined set dosage through its physical features. The system does not require external electronic controls, cloud integration, or operator intervention to enforce dosage limits. The physical constraints of the MCG ensure that the dosage cannot be exceeded or easily overridden, providing inherent reliability through passive mechanical control rather than active electronic monitoring.
3Device complexity
If manual dosing calculation and dispensing are used, then device complexity is reduced, but dosing precision deteriorates due to calculation and dispensing errors
Solution Approach 1:
The patent applies preliminary action by pre-defining the set dosage parameters in the MCG before the dosing process begins. The physical features of the MCG are configured in advance to correspond to the required dosage volume, eliminating the need for manual calculations and adjustments during the procedure. This pre-configuration ensures that the dosage is accurately controlled from the start, preventing calculation and dispensing errors while maintaining relative simplicity.
Data Source
AI summary
The invention provides an adaptor for a medicament delivery device is configured to enable a set dosage of a medicament to be drawn into and/or expelled from the device, the adaptor including: a body configured to be coupled to the device; an attachment portion movable with respect to the body and configured for attachment with a first part of the device; an engaging portion movable with the attachment portion; and a receiver configured to receive a movement constraint guide (MCG) and facilitate engagement between the engaging portion and the MCG; wherein the MCG includes one or more physical features defining at least an aspect of the set dosage; and wherein activation of said first part of the device to draw and/or expel the medicament is stopped when the set dosage is reached by engagement between the engaging portion and at least one of the one or more physical features of the MCG. The invention thus allows ready control of one or more aspects of dosage administration, which can be the amount of a dose and/or or the repeats of a dose.


