Ultrasonic Probe With Non-Uniform Section Modulus
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Solution Overview
Problem
Existing ultrasonic treatment devices face challenges in effectively grasping and treating living tissues due to variations in probe strength along the length, which affects the efficiency of tissue coagulation and cutting.
Innovation Solution
The device incorporates a treatment portion with a distal end that transmits ultrasonic vibrations, a transmission portion, and a moment shift portion, where the second moment of area of the treatment portion is greater than that of the transmission portion, optimizing the probe's strength and vibration distribution to enhance grasping and cutting capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the probe is designed with higher section modulus at the proximal part to improve strength, then the probe strength is improved, but the vibration efficiency and grasping capability at the distal end deteriorate
Solution Approach 1:
The probe is designed with non-uniform section modulus along its length, where the proximal part has higher section modulus for strength and the distal part has lower section modulus for better vibration efficiency. This local differentiation allows each region to optimize its properties for its specific function.
Solution Approach 2:
The section modulus parameter is varied along the length of the probe, creating a gradient from high values at the proximal end to low values at the distal end. This parameter change enables the probe to simultaneously achieve adequate strength while maintaining vibration efficiency for effective tissue treatment.
2Ease of operation
If the treatment portion length is increased to improve grasping capability, then the grasping capability is improved, but the vibration efficiency deteriorates
Solution Approach 1:
The treatment portion is designed with specific local characteristics including appropriate length and section modulus to optimize both grasping capability and vibration efficiency. The local geometry is tailored to provide effective tissue contact while maintaining adequate ultrasonic vibration transmission.
3Ease of manufacture
If the probe section modulus is uniformly distributed to simplify manufacturing, then the manufacturing complexity is reduced, but the vibration efficiency and strength distribution deteriorate
Solution Approach 1:
The probe employs non-uniform section modulus distribution where the proximal part has higher section modulus for strength and the distal part has lower section modulus for vibration efficiency. This design accepts increased manufacturing complexity to achieve superior performance.
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 configuration improves the probe's strength and vibration efficiency, allowing for stable grasping and effective coagulation and cutting of living tissues, even with varying tissue thicknesses, while maintaining structural integrity.
Implementation Method 1
a treatment portion (100) which has a distal end and which transmits ultrasonic vibration generated in an ultrasonic vibrator in a longitudinal direction
Data Source
AI summary
A treatment device includes a treatment portion, a transmission portion and a moment shift portion. The treatment portion transmits ultrasonic vibration. The length of the treatment portion is shorter than ¼ of a wavelength of the ultrasonic vibration. The transmission portion has one end at a node position where the first generated node from the distal end of the treatment portion appears, and is located closer to a proximal side than the node position. The length of the transmission portion is ¼ of the wavelength. The moment shift portion is located between the treatment portion and the transmission portion. An average of I1/A12 is greater than an average of I2/A22, where I1 is the second moment of area and A1 is a sectional area in the treatment portion, and I2 is the second moment of area and A2 is a sectional area in the transmission portion.