Blinding Device for Clinical Trials Using Segmented Housing
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Solution Overview
Problem
Existing blinding devices for clinical trials are not universally applicable for different administration methods of medicaments and inert substances, and they can reveal the administration type due to weight changes, compromising patient and medical staff blinding.
Innovation Solution
A blinding device with an opaque housing that accommodates multiple delivery devices, featuring actuating members for concealed operation and a second compartment to maintain fluid and mechanical interactions hidden, preventing weight changes and ensuring blinding through identical external appearance and operation for placebo and verum types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blinding bag is used to hold back the pharmaceutical presentation, then the administration can be blinded, but the bag gains weight which may be perceptible and increase the risk of unblinding
Solution Approach 1:
The blinding device is segmented into multiple compartments: a first compartment for receiving delivery devices and a second compartment for collecting administered substance. This segmentation allows the device to maintain a constant overall weight while enabling the administration process to be blinded, as the weight distribution changes are contained within separate compartments rather than affecting the entire device.
Solution Approach 2:
A collecting reservoir in the second compartment acts as an intermediary to receive and collect the administered substance. This intermediary structure allows the substance to be collected internally without changing the external weight perception of the device, thereby maintaining blinding efficacy while preventing weight-related unblinding.
2Reliability
If the fluid path and mechanical engagement are concealed inside the housing, then the blinding is improved, but the device complexity increases
Solution Approach 1:
The delivery devices are nested within the first compartment of the housing, and the collecting reservoir is nested within the second compartment. This nested structure allows the fluid path and mechanical engagement to be concealed inside the housing while maintaining a relatively simple external device structure, balancing blinding efficacy with manageable complexity.
Solution Approach 2:
The complex fluid path and mechanical engagement components are extracted and concealed within the housing, leaving only simple external interfaces. This extraction allows the blinding mechanism to be hidden while keeping the external device appearance and operation simple, reducing the perceived complexity for users.
3Adaptability or versatility
If multiple delivery devices are accommodated in the housing, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The housing is designed with universal receptacles that can accommodate different types of delivery devices (syringes, cartridges, cartridges). This universal design allows a single housing structure to support multiple administration methods and device types, improving versatility while avoiding the need for multiple specialized housing structures.
Solution Approach 2:
The receptacles in the housing are designed with adjustable or flexible parameters (such as removable dividers or adaptable mounting mechanisms) that allow them to accommodate delivery devices of different sizes and types. This parameter flexibility enables the housing to adapt to various administration methods without requiring fundamentally different structural designs.
Data Source
AI summary
A blinding device for administering a substance to a patient in a clinical trial is presented where the blinding device has an opaque housing to receive at least two delivery devices adapted to dispense a substance provided therein, an outlet being in fluid communication with at least one delivery device for administering the substance to a patient, and at least one actuating member mechanically engageable with at least one delivery device and being actuatable from outside the housing.