Medication Pump Test Device for Accurate Slide Position Measurement
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Solution Overview
Problem
Existing methods for testing wearable medication pumps are neither accurate nor repeatable, leading to inconsistencies in delivering precise therapeutic agent dosages, which affects product quality and patient safety.
Innovation Solution
A test device system comprising a depth indicator with a slide spindle and a test device affixed to it, where the external body portion has a larger diameter than the medication pump's reservoir compartment, allowing the internal body portion to fit within and maintain the depth indicator at a fixed position, ensuring accurate and repeatable measurements of the pump motor slide position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a ruler or caliper is used to measure pump motor slide position, then the measurement can be obtained, but the measurement accuracy and repeatability deteriorate due to variable insertion angles and inconsistent landmark points
Solution Approach 1:
A test device with a standardized interface is introduced as an intermediary between the pump motor slide and the measurement instrument. This test device includes a contact surface that interfaces with the pump motor slide and a measurement interface that receives the depth indicator, ensuring consistent measurement geometry and eliminating variability from direct ruler/caliper measurements.
Solution Approach 2:
The measurement approach changes from direct visual estimation using rulers to precise depth measurement using a depth indicator with standardized increments. This parameter change transforms the measurement from an approximate visual reading to a precise quantifiable measurement, improving both accuracy and repeatability.
2Productivity
If different persons perform the test using rulers or calipers, then the testing can be conducted, but the test results vary significantly affecting product quality and patient safety
Solution Approach 1:
The test device is designed with universal interfaces that work with any depth indicator and can be used by any operator. The standardized contact surface and measurement interface ensure that the same measurement results are obtained regardless of which person performs the test, making the testing process universally reliable across different operators.
3Ease of operation
If the depth indicator fixed portion is not held at a fixed axial position, then the depth indicator can move freely, but the measurement repeatability deteriorates
Solution Approach 1:
The test device pre-establishes a fixed reference position for the depth indicator by providing a depth indicator recess that receives and positions the fixed portion at a predetermined axial location. This preliminary positioning action ensures that all measurements start from the same reference point, guaranteeing repeatability while still allowing the depth indicator to be installed and removed as needed.
Data Source
AI summary
A medication pump test device and method of use including a test device for use with a medication pump and a depth indicator, the test device including: an external body portion defining a depth indicator recess operable to receive the fixed portion of the depth indicator; an internal body portion attached to the external body portion, the internal body portion defining a slide spindle passage operable to allow free axial movement of the slide spindle of the depth indicator. The test device maintains the fixed portion of the depth indicator at a fixed axial position along the central axis relative to the medication pump when the fixed portion of the depth indicator is seated in the depth indicator recess, the external contact portion contacts the medication pump, and the internal body portion is seated in the open end of the reservoir compartment.