Disposable Electrosurgical Handpiece with Battery Voltage Timer
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Solution Overview
Problem
Reusable electrosurgical handpieces pose a risk of non-sterile reuse in non-ablative surgery due to the inability to ensure single-use compliance, as the appearance of the electrode does not change post-use, potentially leading to inadvertent reuse on different patients.
Innovation Solution
A disposable electrosurgical handpiece with a built-in timer mechanism using a battery with a known discharge rate, coupled to a circuit that monitors voltage and automatically disables the handpiece when the battery voltage falls below a preset value, preventing further use by decoupling the electrode from the electrosurgical current source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reusable electrosurgical handpiece is used, then the device can be used multiple times, but the risk of non-sterile reuse increases and safety cannot be ensured
Solution Approach 1:
The patent implements a disposable handpiece design where the entire assembly including battery, circuit board, and electrode is intended for single use only. After use, the complete unit is discarded rather than reused, eliminating the risk of non-sterile reuse while maintaining productivity for multiple procedures through replacement of entire units.
Solution Approach 2:
The handpiece incorporates a built-in timer mechanism that pre-limits its operational lifetime. The timer is programmed to disable the handpiece after a predetermined time period, automatically preventing reuse before it can occur. This preliminary action ensures safety compliance by making reuse physically impossible rather than relying on user discipline.
2Reliability
If a disposable handpiece is used, then single-use compliance is ensured, but the complexity of the device increases due to timer and monitoring circuits
Solution Approach 1:
The handpiece uses a simple battery-powered timer circuit that automatically tracks usage time and disables the device when the predetermined period expires. The system serves itself by autonomously monitoring its own operational lifetime without requiring external monitoring or complex control systems, thereby ensuring single-use compliance while minimizing added complexity.
Solution Approach 2:
The timer mechanism relies on the natural discharge characteristic of a battery as its timing parameter. By monitoring the battery's voltage decay over time, the system converts a simple electrical parameter change into a reliable time-based disable mechanism, avoiding the need for complex electronic timing circuits while achieving the desired single-use compliance.
3Adaptability or versatility
If the handpiece is designed with electrode replacement capability, then versatility is improved, but the risk of reuse with same or different electrode increases
Solution Approach 1:
The handpiece is designed as an integrated disposable unit where the electrode is permanently attached to the handpiece body and cannot be removed or replaced. This segmentation approach treats the electrode and handpiece as a single non-separable unit, eliminating the versatility of electrode replacement while simultaneously preventing any possibility of reuse with the same or different electrode.
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
Ensures the handpiece is unusable after a predetermined period, preventing reuse and ensuring safety by automatically disabling the device, thus guaranteeing single-use compliance and adherence to safety standards.
Implementation Method 1
the device comprises a timer in the form of an activating battery with a known discharge rate such that the battery voltage gradually reduces in value with use
Implementation Method 2
The battery in turn is coupled to a circuit which monitors the battery voltage and operates a switch which decouples the handpiece electrode from the electrosurgical current source when the battery voltage falls below a preset value
Data Source
AI summary
Incorporating into an electrosurgical handpiece a device configured to disable the handpiece when a built-in usage time period expires. Preferably, the device comprises a timer in the form of an activating battery with a known discharge rate such that the battery voltage gradually reduces in value with use. The battery in turn is coupled to a circuit which monitors the battery voltage and operates a switch which decouples the handpiece electrode from the electrosurgical current source when the battery voltage falls below a preset value. This effectively disables the handpiece preventing reuse.