Removable Mounting Device for TPN Scale Weighing
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Solution Overview
Problem
Existing scales for weighing target containers in medical preparation installations, such as TPN compounders, face difficulties in easily attaching and weighing diverse types of containers like infusion pouches and syringes, often resulting in unwanted forces that falsify measurement results.
Innovation Solution
A balance designed for TPN compounders with a removable device that can be oriented in two ways, featuring mounting means for syringes and infusion pouches, and an inclined weighing dish with overload protection, allowing for secure and precise weighing of various container sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed mounting means is used on the weighing dish, then the attachment of a specific target container type is secure, but the ability to easily attach diverse types of target containers (infusion pouches and syringes) is reduced
Solution Approach 1:
The mounting system is segmented into a removable device that can be detached and reattached in different orientations. This allows the weighing dish to be adapted for different container types (infusion pouches or syringes) by simply removing and reorienting the mounting plate, rather than having a complex fixed system for each container type
Solution Approach 2:
The mounting system transitions from a static fixed configuration to a dynamic reconfigurable system. The removable device can be taken off and reattached in different orientations (0° or 180°), enabling the system to adapt its mounting configuration based on the type of target container being weighed
2Measurement precision
If the target container is weighed during the dosing step with the tube connected, then the weighing process is continuous, but unwanted forces from the tube may falsify the measurement result
Solution Approach 1:
The tube connection is extracted or disconnected during the weighing process. The target container is detached from the dosing tube, weighed separately on the scales, and then reconnected. This eliminates the unwanted forces from the tube that would otherwise falsify the measurement, while allowing the dosing process to resume afterward
Solution Approach 2:
The weighing action is performed as a preliminary step before the actual dosing continues. The target container is weighed first (with tube disconnected), then reconnected and dosing proceeds. This sequencing ensures accurate measurement before the continuous dosing process resumes
3Ease of operation
If a single orientation mounting device is used, then the device structure is simple, but the ease of operation for different container types is reduced
Solution Approach 1:
The removable device is designed with universal functionality to accommodate different target container types through a single device that can be oriented in multiple ways. The same mounting plate, when rotated 180°, provides different mounting configurations suitable for both infusion pouches and syringes, eliminating the need for separate mounting devices for each container type
Data Source
AI summary
The invention relates to a set of scales and to an installation for producing a medical composition using a set of scales. The set of scales comprise interchangeable securing means for a target container, the weight thereof being measured by the set of scales.