RF Probe for Surgical Scope Channel Sterilization
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Solution Overview
Problem
Current methods for sterilizing surgical scope instruments are labor-intensive and often result in incomplete or insufficient sterilization of instrument channels, which can lead to the persistence of harmful microorganisms such as bacteria and viruses.
Innovation Solution
A sterilization apparatus using a coaxial cable to deliver radiofrequency (RF) and/or microwave frequency electromagnetic energy through a probe tip, generating thermal or non-thermal plasma to effectively disinfect the instrument channels of surgical scopes, including those with diameters of 5 mm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning and chemical disinfection methods are used, then the sterilization process can be performed with simple equipment, but the sterilization completeness is insufficient and labor-intensive
Solution Approach 1:
The patent replaces manual mechanical cleaning and chemical disinfection processes with an automated RF/microwave energy delivery system. The coaxial cable apparatus delivers electromagnetic energy directly to the instrument channel, substituting labor-intensive manual procedures with an automated energy-based sterilization method that ensures complete sterilization without requiring complex chemical handling procedures
Solution Approach 2:
The patent utilizes RF and microwave frequency electromagnetic energy to sterilize instrument channels. By changing the energy parameter from mechanical/chemical to electromagnetic radiation, the system achieves reliable sterilization completeness while maintaining relatively simple apparatus complexity. The coaxial cable structure efficiently delivers these electromagnetic parameters to the target area
2Reliability
If RF and microwave energy are used for sterilization, then sterilization effectiveness is improved, but energy consumption increases
Solution Approach 1:
The patent extracts and delivers RF/microwave energy directly to the instrument channel through the coaxial cable apparatus. By concentrating the energy delivery precisely where needed (in the instrument channel) rather than using broad-spectrum chemical disinfection, the system achieves high sterilization effectiveness with controlled and efficient energy consumption
Solution Approach 2:
The patent employs continuous or pulsed RF/microwave energy delivery through the coaxial cable to maintain effective sterilization throughout the instrument channel. This continuous energy action ensures complete sterilization effectiveness while optimizing energy usage by maintaining the energy field only where and when needed, rather than prolonged chemical exposure
3Reliability
If the sterilization instrument is inserted through the instrument channel, then direct sterilization of the channel is achieved, but the device size must be small enough to fit through narrow channels
Solution Approach 1:
The patent utilizes a flexible coaxial cable structure that can be inserted through narrow instrument channels. The coaxial cable design allows the sterilization apparatus to maintain a small profile (fitting through channels with diameters of 5 mm or less) while delivering effective RF/microwave energy. The flexible nature of the coaxial cable enables it to navigate the instrument channel geometry without compromising sterilization effectiveness
Solution Approach 2:
The patent employs a nested structure where the sterilization probe (coaxial cable with electrode) is inserted within the instrument channel of the surgical scope. This nested arrangement allows the sterilization device to pass through the narrow channel while maintaining its functional integrity, achieving direct sterilization of the channel interior without requiring the probe to be larger than the channel itself
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 apparatus provides thorough and efficient sterilization of instrument channels, reducing bioburden and eliminating microorganisms like MRSA, C. difficile, and E. coli, while being compact and adaptable for use with various scope types, including endoscopes and bronchoscopes.
Implementation Method 1
a coaxial cable for conveying radiofrequency (RF) and/or microwave frequency electromagnetic (EM) energy
Implementation Method 2
generating thermal or non-thermal plasma to effectively disinfect the instrument channels
Implementation Method 3
the first electrode and second electrode are arranged to produce an electric field from the received RF and/or microwave frequency EM energy
Data Source
AI summary
Sterilisation apparatus comprising a sterilisation instrument configured to be inserted through the instrument channel of a surgical scoping device and a withdrawal device for withdrawing the sterilisation instrument from the instrument channel at a predetermined rate. The sterilisation instrument comprises an elongate probe having a probe tip with a first electrode and a second electrode arranged to produce an electric field from received RF and/or microwave frequency EM energy. In operation the instrument may disinfect an inner surface of the instrument channel by emitting energy whilst being withdrawn through the channel.