Bone Cement Mixing Device with Rotatable Seal Mechanism
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Solution Overview
Problem
Current devices for producing and discharging bone cement during vertebroplasty are complex and lack simple handling, posing risks of leakage and requiring technical expertise, which complicates pain relief and vertebral stabilization in osteoporosis treatment.
Innovation Solution
A device with a mixing container and piston system that allows for simple mixing and discharge of bone cement, featuring a rotatable mechanism for easy handling, sealing to prevent monomer release, and a distributor system for controlled injection, enabling efficient handling and reduced risk of leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex devices are used for producing and discharging bone cement, then the reliability of the procedure is improved, but the device complexity and ease of operation deteriorate
Solution Approach 1:
The patent combines multiple functions (mixing, sealing, and controlled discharge of bone cement) into a single integrated device. The mixing container serves as both the mixing chamber and the delivery system, with the piston means performing both mixing and controlled discharge functions, eliminating the need for separate mixing bowls and syringes.
Solution Approach 2:
The piston means serves multiple functions: it mixes the bone cement components, seals the mixing container during mixing, and controls the discharge of the cement through the needle. The rotatable seal mechanism provides both sealing during mixing and controlled release during injection, making the device multi-functional and reducing overall system complexity.
2Manufacturing precision
If complex devices with multiple components are used for bone cement mixing and discharge, then the manufacturing precision is improved, but the ease of operation deteriorates
Solution Approach 1:
The device merges the mixing container, piston, seal mechanism, and discharge needle into a single integrated unit. This consolidation maintains manufacturing precision through precise engineering of the integrated components while dramatically improving ease of operation by eliminating the need for multiple separate components that require assembly and coordination.
Solution Approach 2:
The rotatable seal mechanism automatically transitions from a sealed position during mixing to an open position during discharge without requiring manual intervention. The piston means automatically controls the discharge flow based on the seal position, making the device self-regulating and easier to operate.
3Device complexity
If manual handling and transfer of bone cement between containers is used, then the device complexity is reduced, but the risk of leakage and contamination increases
Solution Approach 1:
The device eliminates the need for transferring bone cement between separate mixing bowls and syringes by integrating the mixing and discharge functions into a single container system. The piston means directly discharges the mixed cement through the needle, eliminating transfer steps that could cause leakage or contamination.
Solution Approach 2:
The mixing container serves dual purposes: as a sealed mixing chamber during preparation and as a controlled delivery system during injection. The rotatable seal mechanism provides continuous sealing during mixing while enabling controlled discharge when needed, eliminating the need for separate transfer containers and reducing leakage risks.
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
The device simplifies the handling of bone cement during vertebroplasty, reducing the risk of leakage and improving control during injection, thus enhancing pain relief and vertebral stabilization while maintaining hygiene and safety.
Implementation Method 1
at least one means which is rotatable relative to the mixing container cooperates with the piston means for, in a retaining position, retaining said piston means relative to the mixing container and, by rotation to a release position, releasing the piston means such that said piston means can move towards the opening
Implementation Method 2
a piston means is provided in the mixing space of the mixing container, which piston means can be retained relative to the mixing container and be released such that it can move in relation thereto in a direction towards at least one opening through which mixed mass can pass out of the mixing container
Data Source
AI summary
The present invention relates to a device for producing a hardenable mass, preferably bone substitute and/or bone reinforcing material or bone cement or similar material. A mixing container (3) has a mixing space (4) in which at least one powder and at least one liquid component (5, 6) are mixed to provide the hardenable mass (2). A piston means (7) is provided in the mixing space (4) of the mixing container (3). At least one means (8) which is rotatable relative to the mixing container (3) cooperates with the piston means (7) for, in a retaining position (P1), retaining said piston means (7) relative to the mixing container (3) and, by rotation to a release position (P2), releasing the piston means (7) such that said piston means can move in a direction (U) towards at least one opening (49) through which said mass (2) can pass out of the mixing space (4). The rotatable means (8) is provided such that it in its release position (P2) can follow the piston means (7) in the mixing space (4) in the direction (U) towards said opening (49).