Handheld Rotary Microdebrider for Nasal Polyp Removal
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Solution Overview
Problem
Current surgical instruments for ear, nose, and throat surgeries, such as nasal polyp removal, are either highly invasive and require substantial recovery time or are limited in their ability to remove substantial nasal polyps due to their design and operational constraints.
Innovation Solution
A surgical instrument featuring a hand piece with a blade assembly that includes an outer shaft with a rounded convex distal surface and a cutting slot, and an inner shaft with cutting teeth that rotate relative to the outer shaft, allowing for efficient cutting and removal of tissue while being connected to a negative pressure source for suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a powered fixed piece of capital equipment is used for nasal polyp surgery, then the ability to remove substantial nasal polyps is improved, but the invasiveness and recovery time increase substantially
Solution Approach 1:
The surgical system is divided into a handheld surgical instrument and a separate console. The handheld instrument can be inserted through the nostril with minimal invasion, while the console provides the powered cutting capability. This segmentation allows substantial polyp removal capability without the full invasiveness of traditional fixed equipment.
Solution Approach 2:
The inner shaft with cutting teeth is positioned within the outer shaft, creating a nested structure. The inner shaft rotates within the outer shaft to perform cutting while the outer shaft provides structural support and houses the cutting slot. This nested design enables efficient cutting of substantial polyps through a minimally invasive handheld approach.
2Object-affected harmful factors
If simple tools such as forceps are used for nasal polyp removal in the physician's office, then the invasiveness is reduced, but the ability to remove substantial nasal polyps is limited
Solution Approach 1:
Traditional manual forceps are replaced with a powered rotary cutting system. The inner shaft rotates to provide continuous cutting action, enabling removal of substantial polyps that cannot be removed with simple manual tools. The handheld design maintains minimal invasiveness while the powered mechanism dramatically increases productivity.
3Productivity
If a microdebrider is used to shave tissue and bone, then the cutting capability is improved, but the device complexity and setup requirements increase
Solution Approach 1:
The surgical instrument is designed to cut both soft tissue and bone using the same rotary cutting mechanism. The outer shaft with its rounded convex distal surface and cutting slot, combined with the rotating inner shaft, provides universal cutting capability across different tissue types without requiring multiple specialized devices or complex setups.
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 efficient cutting and removal of tissue with reduced invasiveness and improved access, facilitating more effective nasal polyp surgery with minimized discomfort and recovery time.
Implementation Method 1
Microdebriders may be connected to a vacuum source, which may be used to create suction that remove excess blood and tissue from the surgical field
Implementation Method 2
the inner shaft is configured to rotate relative to the outer shaft such that the first plurality of cutting teeth and the second plurality of cutting teeth cooperate to cut tissue advanced into the passageway through the cutting slot
Data Source
AI summary
Apparatus for use in surgeries to treat disorders of the ear, nose, and throat including a hand-held device and rotating blade assembly. The apparatus may be connected to a vacuum source. A method of use is also disclosed.