Naloxone Auto-Injector with Stabilized Formulation
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Solution Overview
Problem
Current naloxone delivery methods are cumbersome, requiring manual operation and specific training, and are not suitable for untrained users or long-term storage under varying conditions, limiting their accessibility and effectiveness in emergency situations.
Innovation Solution
A medicament delivery device with a naloxone composition that includes a pH adjusting agent, tonicity-adjusting agent, and stabilizers, coupled with an energy storage member to automate the delivery process, and an electronic circuit system for user guidance, allowing for self-administration by untrained users and extended storage under varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If naloxone is delivered via injection or intranasal administration using known formulations, then the medication can be administered to treat opioid toxicity, but the delivery process requires manual operation by trained healthcare providers and cannot be self-administered by untrained users
Solution Approach 1:
The device enables self-service administration through automatic injection mechanisms that eliminate the need for manual injection techniques. The auto-injector design allows untrained users to administer naloxone independently by simply activating the device, which automatically delivers the medication through a needle into the patient's muscle tissue.
Solution Approach 2:
The invention replaces manual mechanical injection operations with an automated mechanical system. The device uses spring-loaded mechanisms and automatic needle deployment to substitute for the manual dexterity and training previously required, transforming a complex manual procedure into a simple activation action.
2Stability of the object's composition
If naloxone formulations are stored under controlled conditions (20-25 degrees Celsius) for limited periods, then the medication maintains its stability, but the formulations are not compatible for being carried by patients or third parties for long periods under varying environmental conditions
Solution Approach 1:
The invention changes the formulation parameters of naloxone to improve stability across varying temperatures. By adjusting pH levels, adding stabilizing excipients, and modifying the solvent composition, the medication maintains its therapeutic efficacy over extended periods and across a broader temperature range, enabling portability without controlled storage conditions.
Solution Approach 2:
The device uses composite material construction with temperature-resistant components and insulation materials to protect the naloxone formulation from extreme temperatures during transport. The housing incorporates materials that provide thermal buffering, allowing the medication to remain stable even when exposed to varying environmental conditions during mobile storage.
3Productivity
If users manually generate force to deliver naloxone from the device, then the medication can be administered, but the force generated is sporadic resulting in undesirable fluctuations in flow and incomplete delivery of the full dose
Solution Approach 1:
The invention replaces manual force generation with an automated spring-loaded mechanical system. The pre-compressed spring provides consistent, controlled force to push the plunger and deliver the full dose of naloxone at a steady rate, eliminating the sporadic force fluctuations that occur with manual operation and ensuring complete dose delivery.
Solution Approach 2:
The device performs preliminary action by pre-compressing the spring mechanism before use. This stored mechanical energy is ready to be released automatically upon activation, providing consistent delivery force without requiring the user to manually generate and maintain steady pressure during the administration process.
4Reliability
If the device includes an energy storage member to automatically deliver naloxone, then consistent and reliable delivery is achieved, but the device complexity increases
Solution Approach 1:
The invention uses a spring-loaded mechanical energy storage system that, while adding components, replaces complex manual operation sequences with a single automated delivery mechanism. The spring, plunger, and needle assembly work together as an integrated automatic injection system that simplifies the user's task to merely activating the device.
Solution Approach 2:
The energy storage member serves multiple functions: it stores mechanical energy for drug delivery, provides the force needed to push the plunger, and can be integrated with the needle deployment mechanism. This multi-functionality reduces the need for separate components and simplifies the overall device structure despite the addition of the energy storage element.
Data Source
AI summary
Medicament delivery devices for administration of opioid antagonists are described herein. In some embodiments, an apparatus includes a housing, a medicament container disposed within the housing and an energy storage member disposed within the housing. The medicament container is filled with a naloxone composition that includes naloxone or salts thereof, a tonicity-adjusting agent, and a pH adjusting agent, whereby the osmolality of the naloxone composition ranges from about 250-350 mOsm and the pH ranges from about 3-5. The energy storage member is configured to produce a force to deliver the naloxone composition.