Bone Cement Mixer Gun with Bias-Loaded Piston
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Solution Overview
Problem
Current medical devices for dispensing bone cement are complex and require multiple steps, lacking efficient control over the amount and placement of the cement during medical procedures.
Innovation Solution
A mixer gun system with a removable holder cap that stores bone cement components in separate chambers, allowing for easy mixing and dispensing through a piston and plunger mechanism, which infuses and dispenses the cement with a biased motion, simplifying the process and improving control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex dispensing systems with multiple components are used, then control over cement dispensing is improved, but device complexity increases
Solution Approach 1:
The patent combines the mixing chamber and dispensing chamber into a single integrated device. The mixing chamber serves dual purposes: mixing the bone cement components and then dispensing the mixed cement through the same nozzle structure. This merging eliminates the need for separate mixing and dispensing devices, reducing overall system complexity while maintaining precise control over cement dispensing through the unified pressure control mechanism.
Solution Approach 2:
The mixing chamber is designed to perform multiple functions sequentially: first mixing the powder and monomer components, then storing the mixed cement, and finally dispensing it through the nozzle. The same chamber and pressure control system serve both mixing and dispensing operations, making the device universal and reducing the number of separate components needed for cement preparation and delivery.
2Measurement precision
If multiple steps are used for mixing and dispensing, then control over cement placement is improved, but ease of operation deteriorates
Solution Approach 1:
The patent enables continuous operation where the mixing and dispensing processes flow without interruption. After mixing the components in the mixing chamber, the system immediately transitions to dispensing the mixed cement through the same nozzle without requiring device removal or reconfiguration. This continuous action maintains precise control over cement placement while simplifying the surgical workflow by eliminating step breaks.
Solution Approach 2:
The system employs dynamic pressure control through a movable piston that can adjust the pressure within the mixing chamber in real-time. This dynamic mechanism allows the surgeon to control the dispensing rate and placement precision during the procedure, while the automated pressure regulation simplifies the operation compared to manual control methods.
3Ease of operation
If simple dispensing systems are used, then ease of operation is improved, but control over cement amount deteriorates
Solution Approach 1:
The patent replaces manual control mechanisms with an automated piston-driven pressure control system. The piston, actuated by a spring or other mechanical actuator, automatically regulates the pressure and flow rate of cement dispensing. This mechanical automation maintains operational simplicity for the user while providing precise control over the amount of cement delivered, eliminating the need for complex electronic controls or manual measurement techniques.
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 system simplifies the mixing and dispensing process, providing precise control over the cement's application, reducing procedural complexity and enhancing the efficiency of bone repair procedures.
Implementation Method 1
A plunger includes a shaft with a threaded portion, the plunger being coupled to the piston and configured to be biased toward the mixing chamber with a spring
Data Source
AI summary
A mixer gun system includes a holder cap configured to separately store components in separate chambers. The components are selectively releasable through channels fluidly communicating with the separate chambers. The components are constituent materials for a bone cement mixture. A body forms a mixing chamber and is configured to receive the holder cap. The mixing chamber includes an opening corresponding with the channels for the separate chambers. A piston is disposed within the mixing chamber. A plunger is coupled to the piston and is configured to be biased toward the mixing chamber such that when the components are released into the mixing chamber a pressure developed by a biased motion of the plunger and piston infuses the components to form bone cement. Upon resetting the plunger and the piston, the bone cement is dispensed from the mixing chamber by the same biased motion. Methods of use are disclosed.