Vibration Tool with Burst Oscillation and Cooling for Tissue Removal
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Solution Overview
Problem
Existing vibration type cutting apparatuses face challenges in efficiently and safely removing hard tissues from soft tissues, as they often cause unintended damage due to frictional heat and require careful manual handling, lengthening surgery time.
Innovation Solution
A vibration type removal apparatus with a tool inserted between the hard and soft tissues, controlled to burst oscillation for efficient cutting and cooled by a liquid supply system, featuring a circular arc or concave surface for easier insertion and enhanced cooling, reducing heat generation and improving safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hard tissue is cut until it becomes thin using a vibration type cutting apparatus, then the hard tissue can be removed from the soft tissue, but the frictional heat generated on the contact surface damages the soft tissue and lengthens surgery time
Solution Approach 1:
The vibration device controls the tool to perform burst oscillation with periodic vibration and stop phases, rather than continuous vibration. This periodic action reduces cumulative frictional heat generation on the soft tissue while maintaining effective cutting during vibration phases, thereby reducing heat damage and surgery time
Solution Approach 2:
A cooling device is introduced as an intermediary between the tool and the soft tissue. The cooling device applies cooling liquid to the tool surface during contact with soft tissue, absorbing frictional heat and preventing it from damaging the soft tissue, thus enabling efficient removal without heat damage
2Ease of manufacture
If a rotary tool is used to cut hard tissue, then cutting can be performed, but frictional heat generated on the contact surface produces the possibility of damaging soft tissue
Solution Approach 1:
The vibration device replaces continuous rotation with periodic burst oscillation, creating intervals of stop and vibration. This reduces the duration of frictional contact with soft tissue, thereby reducing heat generation while maintaining cutting capability during active vibration phases
Solution Approach 2:
The cooling device serves as an intermediary that absorbs frictional heat generated during cutting operations, protecting the soft tissue from thermal damage while allowing effective cutting to proceed
3Productivity
If the hard tissue is cut until it becomes thin, then removal is possible, but unintended deviation of the tool easily leads to damage to soft tissue
Solution Approach 1:
The cooling device acts as a protective intermediary between the tool and soft tissue, providing thermal protection and improving visibility through cooling condensation. This creates a safety buffer that reduces the risk of accidental soft tissue damage even when tool positioning varies
Solution Approach 2:
Burst oscillation with periodic stop phases allows the operator to maintain better control and awareness of tool position relative to soft tissue, reducing the risk of unintended deviation and damage while maintaining overall removal efficiency
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
Enables faster and more stable removal of hard tissues with reduced risk of soft tissue damage by controlling vibrations and cooling the tool, thereby shortening surgery time and ensuring soft tissue safety.
Implementation Method 1
a vibration device arranged in the housing, a tool provided in a distal end portion of the vibration device... a control device that controls driving of the vibration device to vibrate the tool
Implementation Method 2
a cooling device that cools the tool... the tool can be more prevented from generating heat so that heat to be applied to the soft tissue and a peripheral tissue can be more suppressed
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3C
AI summary
There is provided a vibration type removal apparatus capable of efficiently peeling and removing a hard tissue from a soft tissue. A vibration type removal apparatus 2 includes a housing 10, a holding member 11, a tool 12, a control device 20, a vibration device 21, and a cooling pump 22. The control device 20 drives the cooling pump 22, and cooling water supplied from the cooling pump 22 passes through a flow path 25 in the housing 10, and is sprayed toward the tool 12 from a distal end of the flow path 25. In this state, the tool 12 is inserted between a hard tissue HT and a soft tissue ST, the vibration device 21 is operated, and the tool 12 is vibrated. Due to the vibration of the tool 12, a surface of the hard tissue HT which adheres to the soft tissue ST is cut, and the hard tissue HT is peeled and removed from the soft tissue ST.