Syringe Pump Interchangeable Gripping Elements for Blood Treatment
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Solution Overview
Problem
Existing machines for extracorporeal blood treatment face challenges in adaptability to syringes of various sizes, leading to inconsistent anticoagulant flow rates and potential errors due to incorrect syringe recognition.
Innovation Solution
The machine features a syringe pump with interchangeable gripping elements that securely accommodate syringes of different sizes, ensuring consistent longitudinal axis positioning and minimizing syringe recognition errors through a series of gripping elements with elastic arms and a sliding guide system, coupled with a recognition sensor for accurate control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed syringe support is used, then the positioning is simple, but it can only accommodate a limited range of syringe sizes
Solution Approach 1:
The syringe support system is segmented into a fixed support body and interchangeable gripping elements. The gripping elements can be removed and replaced depending on the syringe size, allowing the system to adapt to various syringe dimensions without redesigning the entire support structure.
Solution Approach 2:
The fixed support body is designed with universal features that can accommodate multiple types of gripping elements. This multi-functional design allows a single support structure to serve multiple purposes by simply changing the gripping element, thereby achieving versatility without proportionally increasing overall system complexity.
2Adaptability or versatility
If the syringe size is changed, then different flow rates are needed, but the longitudinal axis position changes requiring recalculation of thrust force
Solution Approach 1:
The gripping elements are pre-positioned on the fixed support body at specific locations that correspond to the longitudinal axes of different syringe sizes. This preliminary positioning ensures that when a syringe is mounted, its longitudinal axis automatically aligns with the predetermined position, eliminating the need for recalculation or adjustment.
Solution Approach 2:
The gripping elements act as intermediaries between the fixed support body and the syringe. They provide a standardized interface that ensures consistent positioning of the syringe's longitudinal axis relative to the pusher, regardless of the syringe size being used.
3Reliability
If there is no syringe type recognition, then the system is simpler, but errors in anticoagulant flow rate may occur
Solution Approach 1:
The sensor system automatically detects the syringe type and provides feedback to the control unit, which then automatically adjusts the pusher parameters. This self-service mechanism eliminates the need for manual syringe identification and parameter setting, reducing the risk of human error while keeping the system relatively simple.
Solution Approach 2:
The sensor mounted on the pusher provides feedback about the syringe's presence and type to the control unit. This feedback loop enables the system to automatically recognize the syringe configuration and adjust the anticoagulant flow rate parameters accordingly, ensuring accuracy without requiring complex manual intervention.
Data Source
AI summary
In a machine for extracorporeal blood treatment, a syringe pump (4) for infusion of an anticoagulant comprises a support (5) for the syringe, a pusher (6), a sensor of the pushing force of the pusher (6), and a control unit (8) for guiding the pusher (6) in accordance with the force measured by the sensor. The support comprises a series of interchangeable gripping elements (9), each of which defines a housing for a syringe having a different diameter, the housing having a longitudinal axis which, for all of the interchangeable gripping elements in the series, is always in the same position in relation to the pusher. The invention provides a dialysis machine with a pump that is easily and rapidly adaptable for syringes over a wide range of sizes.