Ultrasonic Probe with Nerve Stimulation for Eschar Debridement
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Solution Overview
Problem
Existing ultrasonic surgical instruments are inefficient in removing hard eschar buildup during wound healing, cause operator fatigue and patient discomfort due to limited energy transmission, and do not adequately address pain management during procedures.
Innovation Solution
An ultrasonic surgical instrument with a probe and transducer assembly that oscillates at ultrasonic frequencies, combined with a high-frequency alternating voltage source to stimulate nerves and reduce pain, and a synchronization circuit to coordinate vibration with electrical stimulation, ensuring safe and effective tissue emulsification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high vibrational amplitudes are used to effectively remove unwanted tissue, then tissue removal efficiency is improved, but pain perception increases and viable tissue destruction risk increases
Solution Approach 1:
The patent applies preliminary anti-action by administering analgesic or anesthetic agents to the treatment site before ultrasonic energy delivery. This pre-treatment blocks pain receptors and prevents pain signal transmission, allowing high-amplitude ultrasonic vibrations to be used for effective tissue removal without causing patient discomfort or tissue damage from pain-related muscle tension
Solution Approach 2:
The patent introduces chemical intermediaries (analgesic and anesthetic agents) that mediate between the ultrasonic energy delivery system and the patient's nervous system. These agents block pain signal transmission at the cellular level, enabling the use of high-power ultrasonic treatments without transmitting pain signals to the brain
2Productivity
If high vibrational amplitudes are used to remove tissue, then debridement effectiveness is improved, but viable tissue destruction increases
Solution Approach 1:
The patent applies preliminary anti-action by pre-treating the tissue with analgesic and anesthetic agents that not only block pain signals but also reduce tissue susceptibility to thermal and mechanical damage. This protective pre-treatment allows aggressive debridement while preserving viable tissue boundaries
Solution Approach 2:
The patent employs dynamic control of ultrasonic parameters including variable amplitude modulation and pulsed delivery patterns. The system dynamically adjusts vibration intensity based on real-time tissue response, maintaining effective debridement power while preventing cumulative damage to viable tissue through intermittent low-amplitude phases
3Device complexity
If the blunt straight probe is used, then device simplicity is maintained, but energy transmission into the wound is limited
Solution Approach 1:
The patent modifies the probe geometry from a blunt straight design to a curved or angled configuration that better conforms to wound contours and eschar surfaces. This curvature increases the contact area between the probe and irregular wound surfaces, improving energy transmission efficiency without significantly complicating the overall device design
Solution Approach 2:
The patent introduces dimensional variation by incorporating angled or multi-directional vibration capabilities into the probe design. This allows ultrasonic energy to be delivered from multiple angles simultaneously, increasing effective energy transmission into deep wound beds and eschar layers while maintaining a relatively simple probe structure
4Device complexity
If small diameter cannulated tip is used, then device simplicity is maintained, but operation time increases causing operator fatigue
Solution Approach 1:
The patent merges multiple functions into a single integrated probe design that combines debridement, irrigation, and aspiration capabilities. This multi-functional integration eliminates the need for separate instruments, reducing overall procedure time and operator fatigue while maintaining a relatively simple probe structure
Solution Approach 2:
The patent incorporates preliminary action by pre-loading the probe with irrigation solutions and pre-positioning aspiration channels before treatment begins. This preparation allows immediate high-efficiency tissue removal without interruption for fluid management, significantly reducing operation time and operator fatigue
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
Enhances surgical efficiency by improving tissue removal, reducing pain perception, and minimizing damage to viable tissue, while allowing for faster wound healing and reduced operator fatigue.
Implementation Method 1
The tubular probe is excited by a transducer of either the piezoelectric or magnetostrictive type that transforms an alternating electrical signal within the frequencies indicated above into a longitudinal or transverse vibration
Implementation Method 2
The tubular probe is excited by a transducer of either the piezoelectric or magnetostrictive type that transforms an alternating electrical signal within the frequencies indicated above into a longitudinal or transverse vibration
Implementation Method 3
Such devices ablate tissue by either producing cavitation bubbles which implode and disrupt cells
Implementation Method 4
by generating tissue compression and relaxation stresses (sometimes called the jackhammer effect)
Data Source
AI summary
An ultrasonic medical treatment device has a probe, a transducer for mechanically vibrating the probe at an ultrasonic frequency, a voltage source for energizing the transducer, and another electrical voltage source for feeding to the probe a high-frequency alternating waveform of limited current and limited voltage to be conducted into a patient through the operative tip of the probe after placement of the operative tip into contact with the patient. The alternating waveform has a current and a voltage so limited as to prevent damage to organic tissues while stimulating nerves to reduce or suppress pain.