Irrigation Sleeve Shield Extension to Minimize Tissue Wrap
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Solution Overview
Problem
Conventional surgical tools using high-speed rotary instruments, such as burs, experience tissue wrap due to friction between the non-cutting shank and soft tissue, leading to potential tissue adherence and increased tension, which can cause adverse effects.
Innovation Solution
An irrigation sleeve with a shield extension and lumens is designed to minimize tissue wrap by reducing exposed shank contact, featuring a shield extension that minimizes tissue adherence and a lumen structure for fluid delivery to maintain tool reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shank of the cutting accessory is exposed for tool operation, then the cutting accessory can rotate and perform cutting functions, but friction between the rotating shank and soft tissue causes tissue wrap and tissue adherence
Solution Approach 1:
The irrigation sleeve acts as an intermediary component between the cutting accessory shank and the surrounding soft tissue. It provides a protective barrier that prevents direct contact between the rotating shank and tissue, thereby eliminating tissue wrap while still allowing the shank to rotate for cutting operations
Solution Approach 2:
The irrigation sleeve incorporates a lumen through which irrigation fluid can be delivered to the surgical site. This hydraulic system flushes the area to prevent tissue adherence to the shank, working in conjunction with the protective barrier function to eliminate tissue wrap
2Object-affected harmful factors
If the shank is fully covered to prevent tissue wrap, then tissue adherence is reduced, but the cutting accessory cannot effectively contact and cut tissue
Solution Approach 1:
The irrigation sleeve provides different functional zones: the proximal portion covers the shank to prevent tissue wrap and adherence, while the distal portion or opening allows the cutting accessory head to contact and cut tissue effectively. This localized differentiation of coverage ensures both safety and cutting capability
3Object-affected harmful factors
If a shield extension is added to minimize tissue wrap, then tissue adherence is reduced, but the device complexity increases
Solution Approach 1:
The irrigation sleeve merges multiple functions into a single component: it provides the protective shield extension to prevent tissue wrap, incorporates the irrigation lumen for fluid delivery to prevent adherence, and maintains the structural integrity to cover the shank. This consolidation reduces overall device complexity while achieving multiple protective goals
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 irrigation sleeve effectively reduces tissue wrap and enhances the reliability of high-speed rotary instruments by minimizing shank exposure and providing irrigation to prevent tissue adherence, thus ensuring safer and more effective surgical procedures.
Implementation Method 1
a second lumen formed in the sleeve body and spaced out of fluid communication with the first lumen
Data Source
AI summary
An instrument sleeve is provided for use with a surgical rotary instrument having a tube extending to a distal tube end, and a cutting accessory having a head and a shank extending from the head adapted to be rotatably supported by the tube of the rotary instrument. The instrument sleeve comprises a sleeve body extending between proximal and distal sleeve portions, a first lumen for receiving at least a portion of the tube of the rotary instrument, and a shield extension coupled to the sleeve body. The shield extension extends between proximal and distal shield portions the proximal shield portion engaged with the distal sleeve portion and adapted to minimize tissue wrap about the cutting accessory shank.