Elastomeric Infusion Pump Passive Indicator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional intravenous infusion devices lack an effective indicator to inform users whether the pump is dispensing liquid, making it difficult for patients or caregivers to determine if the device is functioning correctly, especially at low flow rates.
Innovation Solution
An elastomeric pump with a chamber that expands and contracts, featuring a passive indicator on the outer layer that changes size or color to signal fluid volume changes, combined with an image capture device and processing system to provide visual feedback to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an elastomeric pump is used to deliver intravenous drugs at a controlled rate, then the device can provide continuous fluid delivery, but it becomes difficult for users to discern whether the pump is providing liquid
Solution Approach 1:
The patent applies color change indicators on the elastomeric pump bladder to visually signal fluid flow status. The indicator changes color or displays different patterns when fluid is flowing versus when it is not, making it easy for users to detect fluid delivery status without complex instrumentation.
Solution Approach 2:
The patent implements visual feedback mechanisms through indicators that provide real-time information about pump operation and fluid flow status. This feedback loop allows users to immediately know whether the pump is delivering fluid as intended, enhancing reliability monitoring.
2Measurement precision
If the pump operates at low flow rates, then precise drug delivery is achieved, but the indicator becomes difficult to see and interpret
Solution Approach 1:
The patent uses distinct color changes or color intensity variations that remain visible even at low flow rates. The indicator is designed to provide sufficient visual contrast and signal strength to be easily detected regardless of the slow movement of the bladder wall during low flow operation.
Solution Approach 2:
The patent employs indicators that provide information in multiple dimensions or aspects, such as combining color change with pattern change or position change, to ensure the indicator remains detectable and interpretable even when the physical movement of the bladder is minimal at low flow rates.
3Loss of information
If an indicator system is added to show pump operation, then user awareness of fluid flow is improved, but the device complexity increases
Solution Approach 1:
The patent employs passive indicators that automatically change state in response to pump operation without requiring external power sources, control circuits, or active components. The indicator system serves itself by utilizing the mechanical movement and pressure changes already present in the elastomeric pump system to generate visual feedback.
Solution Approach 2:
The patent uses simple, inexpensive indicator materials such as colored inks, dyes, or printed patterns on the elastomeric bladder that can be manufactured at low cost. These indicators are integrated into the disposable pump unit, eliminating the need for expensive, complex, or reusable indicator systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows users to easily perceive and interpret the infusion status, ensuring that fluid is being delivered accurately and reliably, even at low flow rates, enhancing user confidence and safety.
Implementation Method 1
an outer layer configured to expand as the chamber receives fluid and to contract as the chamber dispenses fluid
Data Source
AI summary
Systems and methods are provided for signaling a condition of an infusion assembly. An example system may comprise an elastomeric pump that includes a chamber for receipt of a volume of fluid, an outer layer configured to expand and contract as the chamber receives and dispenses the fluid, and a passive indicator provided on the outer layer for signaling a change in the volume of the fluid in the chamber. The example system further may comprise an image capture device configured to capture an image of the pump, and a processing system configured to process the image to signal the condition of the infusion assembly to a user of the system. An example method may comprise capturing the image of the pump; processing the image; and displaying information to the user of the pump to communicate a condition of the pump to the user. Various elastomeric pumps for infusion assemblies also are provided.