Bone Cement Cartridge Conduit for Complete Monomer Transfer
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Solution Overview
Problem
Existing bone cement mixing devices require significant user force to fully convey monomer liquid into bone cement powder, leading to potential injury risks and incomplete liquid transfer due to bag compression issues.
Innovation Solution
A device with a conduit extending into the interior space, allowing the monomer liquid to flow into the distal part and be conveyed into the proximal part without fully compressing the bag, using a conduit length corresponding to a quarter of the bag length, facilitated by a dispensing and feed plunger arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the bag is completely compressed to convey all monomer liquid into the bone cement powder, then the liquid transfer is improved, but the user force requirement increases significantly and injury risk increases
Solution Approach 1:
The conduit acts as an intermediary element that extends from the dispensing plunger into the distal part of the interior space. This conduit provides a fluid pathway that allows monomer liquid to be conveyed without requiring complete compression of the bag, thereby reducing the force needed while maintaining complete liquid transfer.
Solution Approach 2:
The invention introduces a spatial dimension by extending the conduit into the distal part of the interior space (at least one quarter of the bag length). This dimensional extension creates a fluid pathway that bypasses the need for complete bag compression, allowing liquid transfer through a different spatial route.
2Quantity of substance
If the bag is completely compressed to convey all monomer liquid, then the liquid transfer is improved, but the operation difficulty increases due to fold formation sealing liquid
Solution Approach 1:
The conduit serves as a mediator that establishes a controlled fluid pathway. By extending the conduit into the distal part of the interior space, the system creates a reliable liquid transfer route that is not blocked by fold formation, simplifying the operation while ensuring complete liquid conveyance.
3Productivity
If the conduit length is increased to extend into the distal part of the interior space, then the liquid transfer efficiency is improved, but the device complexity increases
Solution Approach 1:
The conduit is extended into the distal part of the interior space along the axial dimension (at least one quarter of the bag length). This dimensional extension improves liquid transfer efficiency by creating a direct fluid pathway, while the conduit's simple tubular structure maintains manufacturing simplicity.
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 complete monomer liquid transfer with reduced user force requirement, minimizing the risk of liquid inclusions and ensuring efficient mixing of bone cement components.
Implementation Method 1
the interior space is connectible at the proximal part of the interior space to a negative pressure source via a vacuum connector
Data Source
AI summary
A device for providing a bone cement paste from two starting components, comprising a hollow cylindrical cartridge with an interior space, wherein, in a proximal part of the interior space, a bone cement powder is stored as the first starting component, and, in a distal part of the interior space, at least one bag containing a monomer liquid as the second starting component is stored, wherein the interior space is connectible at the proximal part of the interior space to a negative pressure source via a vacuum connector, wherein a dispensing plunger, which is movable axially in the interior space, is arranged between the bone cement powder and the at least one bag, and a feed plunger, which is movable axially in the interior space, is arranged on a side, axially opposite the dispensing plunger.