Pressurized Vial Injection Using an Internal Balloon Bladder
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Solution Overview
Problem
Existing injection devices for pharmaceutical drugs in vials face challenges such as limited viscosity and force delivery, risk of contamination, improper dose preparation, and transfer inefficiencies, leading to compliance issues and waste.
Innovation Solution
A medical fluid injection device using a balloon within a vial to increase pressure for drug delivery, featuring a vial holder, canister holder, balloon spike, and injection spike for efficient drug transfer and administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a balloon is inflated within the vial to pressurize the medical fluid, then the force and pressure for drug delivery are improved, but the device complexity increases
Solution Approach 1:
The balloon is nested within the vial, with the balloon spike inserted through the vial stopper into the vial interior. The balloon is inflated inside the vial to pressurize the medical fluid, eliminating the need for external pressurization mechanisms and reducing overall device complexity while maintaining high force delivery capability.
Solution Approach 2:
The balloon acts as an intermediary element between the compressed gas canister and the medical fluid. Compressed gas from the canister inflates the balloon, which then transmits the pressure to the medical fluid, enabling effective force delivery without direct mechanical coupling between the canister and vial contents.
2Ease of operation
If manual transfer from vial to syringe is performed, then the ease of operation is improved, but the loss of time and risk of contamination increase
Solution Approach 1:
The injection device merges the vial holder, balloon inflation system, and injection cannula into a single integrated unit. The device allows direct injection from the vial through the injection spike and cannula, eliminating the separate syringe transfer step and reducing both time and contamination risk while maintaining ease of operation.
3Quantity of substance
If vials are overfilled to account for incomplete transfer, then the quantity of substance delivered is improved, but the loss of substance increases
Solution Approach 1:
The device replaces manual mechanical transfer with a pressurization system. The inflated balloon creates pressure that actively drives the medical fluid out of the vial through the injection spike and cannula, ensuring complete transfer of the full vial volume without requiring overfilling compensations, thereby eliminating waste while maintaining accurate dosing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safe, efficient, and complete drug transfer from vials with reduced risk of contamination and waste, improving user compliance and reducing preparation errors.
Implementation Method 1
inflation of a balloon within a container of the medical fluid to increase the pressure within the container to drive the medical fluid out of the container
Data Source
AI summary
A medical fluid injection device, a medical fluid transfer device and a method of administering and transferring a medical fluid are disclosed. The device and method may include a compressed gas canister in fluid communication with an expandable elastic bladder positioned within a vial of drug to provide a means to deliver drug through an injection cannula that is movable between a plurality of positions or through a transfer conduit.