Ferromagnetic RFID Insert Assembly for Reliable Medical Device Communication
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Solution Overview
Problem
Existing ultrasonic medical devices face challenges in generating adequate oscillatory amplitudes for drilling and perforation, particularly in confined spaces like the oral cavity, and suffer from ineffective communication between miniature RFID identifiers due to metal interference and liquid absorption, leading to signal attenuation and poor wireless connectivity.
Innovation Solution
An insert assembly with a ferromagnetic layer, dielectric layer, and insert antenna, along with an RFID chip, minimizes electromagnetic interference and ensures reliable wireless communication, maintaining device performance and safety while allowing for compact and autoclave-resistant design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ferromagnetic layer is added to the insert assembly to reduce electromagnetic interference, then wireless communication reliability is improved, but device complexity increases
Solution Approach 1:
A ferromagnetic layer is introduced as an intermediary component between the RFID antenna and the metal insert body. This layer acts as a shield to reduce electromagnetic interference and signal attenuation caused by the metal insert, thereby improving wireless communication reliability without requiring fundamental changes to the RFID system architecture.
Solution Approach 2:
The insert assembly is constructed as a composite structure combining the ferromagnetic layer with the metal insert body. This composite design allows the ferromagnetic material to provide electromagnetic shielding properties while the metal insert maintains its mechanical and functional characteristics, achieving both communication reliability and structural integrity.
2Ease of operation
If the RFID identifier is miniaturized to fit the insert, then ease of operation is improved, but communication reliability deteriorates due to signal attenuation
Solution Approach 1:
The ferromagnetic layer serves as a protective intermediary that compensates for the limitations of miniaturization. By placing this layer between the RFID antenna and the metal insert, it reduces signal attenuation that would otherwise be exacerbated by the small antenna size, allowing the miniaturized RFID to maintain reliable communication.
Solution Approach 2:
The metal insert, which naturally causes electromagnetic interference and signal attenuation, is addressed by adding a ferromagnetic layer that converts the harmful electromagnetic effects into beneficial magnetic shielding. This layer absorbs and redirects electromagnetic interference, protecting the miniaturized RFID antenna while allowing it to remain compact.
3Reliability
If the insert diameter is increased to accommodate the RFID components, then communication reliability is improved, but the increase in diameter obstructs the operator's vision of the surgical site
Solution Approach 1:
The ferromagnetic layer is implemented as a thin film or coating on the insert body rather than a bulky component. This thin-film approach provides effective electromagnetic shielding and improves RFID communication reliability while adding minimal diameter, thereby preserving the operator's clear vision of the surgical site.
Solution Approach 2:
The ferromagnetic layer is applied locally where it is most needed - around the RFID antenna and at the insert body interface where electromagnetic interference is strongest. This localized application provides maximum communication reliability improvement with minimal increase in overall insert diameter, maintaining surgical site visibility.
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 provides effective wireless communication, ensures safe and efficient operation of ultrasonic devices, maintains mechanical performance, and supports reliable identification and traceability of inserts, enhancing patient safety and device efficiency.
Implementation Method 1
a ferromagnetic layer (6), arranged on the insert metal tang (5), in which the ferromagnetic layer (6) is adapted to reduce or cancel phenomena of attenuation and/or distortion of the electromagnetic field caused by field parasitic effects in the vicinity of the insert antenna (8) due to the interaction of a transmitted/received electromagnetic field with metal parts
Implementation Method 2
an insert antenna (8), arranged on a dielectric layer (7), and comprising a metal insert antenna element (9), which extends along a predefined, essentially planar profile (P)
Implementation Method 3
The operation of most ultrasonic power systems is based on the transmission of longitudinal waves in the application means. Such waves are generated by piezoelectric transducers
Implementation Method 4
the insert (2) adapted to interact with a part of the patient's body
Data Source
AI summary
An insert assembly, insertable in a handpiece of a medical device, has an insert having an insert metal tang, a ferromagnetic layer in contact with the insert metal tang, a dielectric layer in contact with the ferromagnetic layer, an insert antenna in contact with the dielectric layer, having an insert antenna metal element and configured to receive and transmit electromagnetic fields, and an identification chip operatively connected to the insert antenna and configured to transmit information about the insert assembly. The ferromagnetic layer reduces or cancels attenuation and/or distortion phenomena of an electromagnetic field caused by parasitic effects due to interaction of a transmitted or received electromagnetic field with metal parts of the insert metal tang, liquids present in the insert, and the insert antenna metal element. The ferromagnetic layer dielectric layer and insert antenna form a transceiver device putting the identification chip in communication with a handpiece antenna.