Ultrasonic Instrument End-of-Life Indicator
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Solution Overview
Problem
Ultrasonic medical instruments are prone to fatigue and wear, leading to potential sudden failure and damage to organic tissues during surgical procedures, as existing methods lack effective indicators for monitoring instrument degradation.
Innovation Solution
An ultrasonic medical instrument with a biocompatible and biodegradable end-of-life indicator element made of ceramic or polymeric materials that gradually disintegrates with use, providing a visible indicator of the instrument's remaining useful life, which can be affixed to the probe shaft or head, and includes a secondary indicator that becomes visible once the primary indicator degrades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic instruments are used for extended periods to maximize productivity, then productivity improves, but reliability deteriorates due to fatigue and wear leading to sudden failure
Solution Approach 1:
The patent applies preliminary action by incorporating an end-of-life indicator element that proactively signals instrument degradation before sudden failure occurs. The indicator element is pre-installed on the probe shaft and gradually disintegrates or changes appearance as the instrument accumulates use, providing advance warning to replace the instrument before it fails, thus maintaining both productivity and reliability.
2Loss of substance
If instrument usage is extended beyond recommended limits to reduce costs, then cost efficiency improves, but harmful factors increase due to potential damage to organic tissues
Solution Approach 1:
The patent implements feedback through the end-of-life indicator element that provides continuous visual information about the instrument's degradation state. As the indicator element disintegrates or changes appearance with use, it gives real-time feedback to the operator about the instrument's remaining safe usage life, enabling timely replacement before tissue damage can occur, thus balancing cost efficiency with patient safety.
3Device complexity
If no visual indicator is provided for instrument degradation, then device complexity is reduced, but measurement precision deteriorates as degradation cannot be detected
Solution Approach 1:
The patent applies color changes by using an end-of-life indicator element that undergoes visible physical or chemical changes as it degrades. The indicator element may change color, become translucent, or disintegrate visibly, providing a simple yet effective visual measurement of the instrument's degradation state without adding complex monitoring systems, thus maintaining low device complexity while improving measurement precision.
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 effectively prevents sudden failure and reduces tissue damage by allowing medical personnel to monitor and retire the instrument before it reaches the end of its useful life, ensuring patient safety and preventing unnecessary damage.
Implementation Method 1
the indicator element being made of a second material that gradually disintegrates or degrades with use of the instrument
Implementation Method 2
source of ultrasonic mechanical vibratory energy
Data Source
Figure 1
AI summary
An ultrasonic medical instrument includes a probe shaft having a threaded coupling at a proximal end and an end effector or head at a distal end. The coupling is configured for operative attachment to a source of ultrasonic mechanical vibratory energy, while the head has an operative surface configured for engagement with organic tissues of a patient. The probe shaft, the coupling, and the head are made of a metal or metal alloy. At least one end-of-life indicator element is affixed to the probe shaft or head, the indicator element being made of a material that gradually disintegrates or degrades with use of the instrument so as to provide a visible indicator of degree of use and remaining useful life of the instrument.