Injector Control Cassette for Faster Sterile High-Pressure Setup
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Solution Overview
Problem
Existing medical high-pressure injectors face challenges with time-consuming and error-prone connection of disposable connecting lines, which require careful handling to avoid air introduction and result in significant liquid waste, and lack suitable pressure resistance for dialysis applications.
Innovation Solution
The connecting lines are integrated into an interchangeable control cassette with pre-configured, minimally sized components, including valves and gas bubble separation, which can be easily inserted into a cassette holder, reducing setup time and error risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connecting lines are used as disposable items in medical high-pressure injectors, then hygiene requirements are met, but connection effort increases and errors become more likely
Solution Approach 1:
The patent combines multiple connecting lines and components into a single pre-assembled control cassette unit. This integration allows the entire fluid pathway system to be replaced as one unit, reducing the number of separate connection steps and minimizing the risk of errors during assembly while maintaining hygiene compliance through disposable design.
2Reliability
If connecting lines are replaced frequently as disposable items, then hygiene is maintained, but time consumption increases
Solution Approach 1:
The control cassette is pre-assembled with all necessary connecting lines, valves, and components in the correct configuration before being packaged as a disposable unit. This preliminary preparation eliminates the need for on-site assembly and configuration during patient examinations, significantly reducing replacement time while maintaining hygiene standards.
3Ease of operation
If connecting lines are designed with larger volume, then fluid flow is easier, but liquid waste increases
Solution Approach 1:
The patent optimizes the internal diameter and length parameters of the connecting lines within the control cassette to achieve the minimum necessary volume that still permits adequate fluid flow. By carefully selecting these dimensional parameters, the system reduces the volume of contrast medium required to prime and operate the lines, thereby minimizing liquid waste while maintaining functional performance.
4Device complexity
If passive valves are used in connecting lines, then structure is simple, but pre-pressure creation for bolus sharpening is not possible
Solution Approach 1:
The patent incorporates active electronically controlled valves within the disposable control cassette. Although this increases the complexity of the valve structure compared to passive valves, the entire cassette including these advanced valves is designed as a single-use disposable unit. This approach enables sophisticated functions like pre-pressure creation for bolus sharpening without requiring permanent installation of complex valve systems in the injector.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6b
AI summary
The invention relates to a medical high-pressure injector for injecting a liquid provided in a syringe (2.1, 2.2) into a patient, wherein the injector has at least one syringe holder (10) with an associated drive for the held syringe (2.1, 2.2) and connecting lines for transferring the liquid from the syringe (2.1, 2.2) into a patient tube and/or for filling the syringe (2.1, 2.2) held in the syringe holder (10), wherein the connecting lines are formed in an interchangeable control cassette (3) and the injector has a cassette holder (11) with an openable and closable receiving chamber (110) into which the control cassette (3) can be inserted.