Flooded Ear Canal Resection for Clearer Endoscopic Surgery
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Solution Overview
Problem
Surgical procedures involving high-speed cutting instruments within small bodily orifices or cavities, such as the ear canal, generate heat and debris, leading to impaired visualization and tissue damage due to obstructed views and elevated temperatures.
Innovation Solution
A surgical system with a reservoir system providing a flooded environment within the ear canal using irrigation and suction to maintain a steady state fluid volume, submerging the cutting instrument and endoscope, thereby cooling the tool and clearing the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If irrigation and suction are provided to clear the field of view and cool the cutting bur, then visualization is improved and heat is reduced, but additional instruments must be placed within the ear canal consuming valuable space
Solution Approach 1:
The cutting instrument integrates both cutting functionality and irrigation/suction capabilities within a single device. The cutting bur is positioned within a housing that contains irrigation channels and suction ports, allowing the instrument to perform multiple functions simultaneously without requiring separate additional instruments in the ear canal.
Solution Approach 2:
The cutting instrument is designed as a multi-functional device that combines tissue cutting, irrigation for cooling, and suction for debris removal. This universal design eliminates the need for multiple separate instruments, thereby preserving valuable space within the ear canal while maintaining effective field of view clarity and heat management.
2Productivity
If high-speed cutting instrument is used to resect bone or tissue, then productivity is improved, but heat generation increases the risk of necrosis or tissue damage
Solution Approach 1:
Irrigation fluid serves as an intermediary cooling medium that flows through channels in the cutting instrument housing to directly cool the cutting bur and surrounding tissue. This intermediary fluid barrier between the high-speed cutting zone and the tissue being cut prevents direct heat transfer to the tissue, reducing necrosis risk while maintaining high productivity.
Solution Approach 2:
The system utilizes hydraulic principles by introducing liquid irrigation through the cutting instrument to absorb and carry away heat generated during high-speed cutting. The fluid dynamics of the irrigation system enable efficient heat removal from the cutting zone, allowing sustained high-productivity operations without excessive temperature rise and tissue damage.
3Productivity
If high-speed cutting instrument is used within small body cavity, then productivity is improved, but debris accumulates and impairs field of view
Solution Approach 1:
The suction system operates continuously during the cutting process to maintain constant removal of bone and tissue debris from the surgical field. This continuous action prevents debris accumulation that would obstruct the endoscopic field of view, allowing sustained high-productivity resection without visualization loss.
Solution Approach 2:
Suction creates a negative pressure gradient that continuously draws debris away from the cutting site through the housing ports. This pneumatic-hydraulic mechanism ensures that debris does not accumulate in the small body cavity, maintaining clear field of view throughout high-rate resection operations.
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 flooded environment improves cutting efficiency, reduces tissue damage, and maintains clear visualization by minimizing debris obstruction, allowing for precise surgical procedures like tympanoplasty and cochlear implant surgery.
Implementation Method 1
providing a flooded environment within the ear canal... cooling the tool
Implementation Method 2
suction to clear the field of view and cool the cutting bur
Data Source
AI summary
Systems and methods for performing transcanal ear surgery. A volume of fluid is maintained within the ear canal to provide a flooded environment. A cutting member of a cutting instrument is submerged and operated within the flooded environment to resect tissue within the ear. A reservoir system may be coupled to the patient to facilitate providing the flooded environment. The reservoir system at least partially surrounds the auricle of the ear in fluid-tight sealing engagement with the head of the patient. An irrigation pump and a suction source on one or both of the reservoir system and the cutting instrument are operated to provide the flooded environment. The reservoir system includes an access opening sized to receive one or more surgical instruments, for example, the cutting instrument and an endoscope. The flooded environment improves cooling of the surgical site and visualization of the surgical site from the endoscope.