Medical Device Detection Unit for Tissue Contact Safety
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Solution Overview
Problem
Existing medical devices used for shunt treatment in heart failure patients face challenges in detecting whether the energy transmission element is properly pressed against the biological tissue, leading to risks of thrombus formation and unintended tissue damage.
Innovation Solution
A medical device with an expandable body and a detection unit that compresses the energy transmission element, allowing the electric power supply device to determine if the energy transmission element is pressed against the tissue, thereby reducing energy supply when not in contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If energy is supplied to the electrode without performing an operation of pressing the electrode against the biological tissue, then the operation is simplified, but there is a risk that a thrombus is formed by the electrode being exposed to blood or that an unintended part is damaged
Solution Approach 1:
The medical device incorporates a detection unit that provides feedback to the electric power supply device about whether the electrode is pressed against the biological tissue. The detection unit includes a detection switch that changes state based on the compression of the expandable body, and an output unit that transmits this state information to the electric power supply device. This feedback mechanism allows the system to automatically control energy supply based on actual tissue contact, simplifying the operation while preventing harmful effects from improper energy delivery.
2Reliability
If a detection unit is added to detect compression of the expandable body, then the safety is improved by reducing energy supply when not in contact, but the device complexity increases
Solution Approach 1:
The expandable body serves multiple functions: it mechanically compresses the electrode against the tissue and simultaneously acts as a compression member that triggers the detection switch. This multi-functionality reduces the need for separate detection components. The detection unit is integrated into the housing, and the output unit uses the existing electrical connection infrastructure to communicate with the electric power supply device, minimizing additional complexity while achieving reliable safety detection.
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
This solution effectively reduces the risk of thrombus formation and unintended tissue damage by ensuring that energy is only supplied when the energy transmission element is correctly positioned, enhancing the safety and efficacy of the treatment.
Implementation Method 1
an elongated displacement shaft configured to be relatively displaced from an initial position to a compression position with respect to the shaft portion along an axial direction of the expandable body so as to compress the expandable body in the axial direction
Implementation Method 2
an electric wire connectable to an electric power supply device that supplies electric power to the energy transmission element, and configured to pass through the housing and extend to the energy transmission element along the shaft portion
Implementation Method 3
an energy transmission element provided along the expandable body
Data Source
AI summary
A medical device and a medical system that can reduce supply of energy to an energy transmission element without performing an operation of pressing the energy transmission element against a biological tissue. The medical device includes an expandable body, a shaft portion connected to the expandable body, an energy transmission element provided in the expandable body, a housing connected to a proximal end portion of the shaft portion, a displacement shaft that compresses the expandable body in an axial direction, an operation knob that is capable of moving with respect to the housing, a detection unit that is housed in the housing and that detects compression of the expandable body caused by the displacement shaft, an electric wire that is capable of being connected to an electric power supply device for supplying electric power to the energy transmission element, and that extends to the energy transmission element.