Surgical Tip Projections for Capsular Bag Cleaning
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Solution Overview
Problem
Current irrigation and aspiration instruments in ophthalmological surgery, particularly during phacoemulsification, often fail to completely remove epithelial and cortical tissue fragments from the capsular bag, leading to post-operative complications such as inflammation, increased intraocular pressure, decentration of intraocular lenses, and the formation of secondary cataracts.
Innovation Solution
A surgical apparatus comprising a hollow cannula with a distal tip having transverse ports and projections for secure attachment, designed for efficient irrigation and aspiration, which includes an infusion sleeve and can be connected to a vacuum or fluid supply source, allowing for effective removal of tissue fragments during cataract surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional irrigation and aspiration instruments are used, then the surgical procedure can be performed, but complete removal of cortical tissue fragments is not achieved, leading to post-operative complications
Solution Approach 1:
The tip is segmented into multiple functional zones with different port configurations - a first port for irrigation and a second port for aspiration, allowing simultaneous and separate control of fluid delivery and tissue removal functions to achieve complete cortex removal
Solution Approach 2:
Different regions of the tip have different properties - the first port is positioned and sized for effective irrigation, while the second port is positioned and sized for effective aspiration, with each port optimized for its specific function to collectively achieve complete tissue removal
2Stability of the object's composition
If the tip is securely locked to the cannula, then the assembly structure is stable, but the manufacturing complexity increases
Solution Approach 1:
The locking mechanism is merged with the tip structure itself - projections are formed as integral parts of the tip base that engage with recesses in the cannula, eliminating the need for separate locking components and simplifying manufacturing while ensuring stable assembly
Solution Approach 2:
The tip is nested within the cannula structure, with the tip base portion fitting inside the cannula lumen and locking into place through projections and recesses, creating a compact and stable integrated assembly
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 apparatus ensures safe and efficient removal of cortical and epithelial tissue fragments, reducing the risk of post-operative complications like inflammation and lens misalignment, thereby improving surgical outcomes by enhancing the cleaning of the capsular bag for intraocular lens implantation.
Implementation Method 1
The hand piece will typically have an irrigation and aspiration mode specifically for this task
Implementation Method 2
designed for efficient irrigation and aspiration, which includes an infusion sleeve and can be connected to a vacuum or fluid supply source
Data Source
AI summary
A surgical apparatus (10, 10A, 10B, 10C) includes a hollow cannula (20, 20A, 20B, 20C) including least one locking aperture (34, 34A, 34B, 34C) extending therein. The apparatus (10, 10A, 10B, 10C) has a hollow tip (40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H, 40I) with a base portion (42, 42B, 42C, 42D, 42E, 42F, 42G, 42H, 42I) including at least one projection (50, 50A, 50B, 50C, 50D, 50E, 50F, 50G, 50H, 50I) extending within the at least one locking aperture (34, 34A, 34B, 34C) of the cannula (20, 20A, 20B, 20C) for maintaining the tip (40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H, 40I) in position. The tip (40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H, 40I) has an exposed end portion (44, 44A, 44B, 44C, 44D, 44E, 44F, 44G, 44H, 44I) extending beyond the cannula (20, 20A, 20B, 20C) and defines at least one port (48, 48A, 48B, 48C, 48D, 48E, 48F, 48G, 48H, 48I) in fluid communication with the interior of the cannula (20, 20A, 20B, 20C).