Controlled Injection System for Bone Cement Visualization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for introducing bone cement into a cavity during medical procedures face challenges such as difficulty in visualizing the cement flow and meniscus due to the obstructing needle, requiring manual approximation of withdrawal and injection rates, which can be inconsistent and inefficient.
Innovation Solution
A controlled injection system comprising an injection device with a barrel, plunger, and needle, combined with a jig that allows for precise placement and movement, enabling the needle to be advanced and withdrawn while maintaining a continuous flow of cement into the cavity, using a mechanical stop to prevent excessive advancement and ensure consistent delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual needle withdrawal is performed simultaneously with cement injection, then continuous cement flow is achieved, but visualization of the cavity and meniscus is obstructed and control precision is reduced
Solution Approach 1:
The manual operation is segmented into two independent functions: the injection device controls cement delivery while the jig controls needle positioning and withdrawal. This segmentation allows each component to optimize its function without interfering with the other, maintaining continuous flow while improving visualization.
Solution Approach 2:
The jig acts as an intermediary device between the operator and the injection device. It provides mechanical guidance for needle withdrawal while the injection device independently controls cement flow, eliminating the need for manual coordination and improving both visualization and control precision.
2Productivity
If manual coordination of needle withdrawal and plunger depression is performed, then cement injection is achieved, but operational complexity and time consumption increase
Solution Approach 1:
The jig combines multiple functions into a single device: it guides needle positioning, controls withdrawal rate, and provides mechanical stops for precise depth control. By merging these functions, the system reduces operational complexity while improving injection efficiency.
Solution Approach 2:
The injection device is designed to maintain continuous cement flow automatically through its internal mechanics, eliminating the need for manual plunger coordination. The device serves itself by maintaining flow continuity without requiring operator intervention, thereby improving productivity while reducing operational complexity.
3Reliability
If the needle is withdrawn at a continuous rate from the cavity, then uninterrupted cement flow is maintained, but control over injection rate and depth precision is reduced
Solution Approach 1:
The jig is pre-configured with mechanical stops and guidance features before the procedure begins. These preliminary structural arrangements ensure that the needle reaches precise depths and maintains continuous flow without requiring real-time manual adjustment, thereby improving both reliability and precision.
Solution Approach 2:
Manual mechanical coordination is replaced with a guided mechanical system (the jig) that provides structured control over needle movement. The jig's mechanical guides and stops substitute for manual coordination, maintaining uninterrupted flow while improving depth control precision through fixed mechanical constraints.
Data Source
AI summary
Medical devices are described herein. More particularly, the disclosure relates to controlled injection devices, systems, and methods used for the introduction of treatment material into a cavity. An exemplary controlled injection system comprises an injection device and a jig. The jig is adapted to receive the injection device and has a jig head, jig shaft, and a jig housing.