Asymmetrical Holding Ring for Surgical Microscope Drape Alignment

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Solution Overview

Problem

Conventional surgical microscope drapes and holding rings face challenges in secure and accurate positioning, leading to potential contamination, damage, and disruptions during surgical operations due to reflection issues and the need for frequent repositioning.

Innovation Solution

A holding element with an asymmetrical contour for the holding ring, which ensures a single predefined fastening position, preventing rotation and ensuring accurate alignment, combined with a flexible drape and optional magnetic or rubber coating for secure attachment, and an asymmetrical guide for the objective protection glass to minimize reflections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a conventional symmetrical holding ring is used, then the drape can be mounted on the surgical microscope, but the holding ring can be freely turned and must be manually repositioned to find the correct position, which may cause the drape to become unsterile or damaged

Engineering Contradiction:
Improvemounting operationVSAvoidsterility maintenance
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The holding ring is designed with an asymmetrical contour that includes a specific engagement feature (such as a protrusion or asymmetric shape) that corresponds to a matching feature on the surgical microscope interface. This asymmetry ensures that the holding ring can only be mounted in one specific orientation, eliminating the need for manual repositioning and preventing the drape from becoming unsterile or damaged during operation.

Inventive Principle:
Principle #4Asymmetry

2Adaptability or versatility

If a conventional holding ring with multiple separate windows is used for multiple optical systems, then each optical system can be covered, but the positioning becomes more complex and reflections may still affect multiple areas

Engineering Contradiction:
Improvemulti-optical system coverageVSAvoidholding ring structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The holding ring incorporates a single integrated asymmetric contour design that provides a unified engagement interface for the surgical microscope. This unified structure replaces the need for multiple separate windows or clearances, simplifying the overall design while maintaining the ability to cover multiple optical systems through the single asymmetric engagement interface.

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If manual repositioning of the holding ring is performed to reduce reflections, then the surgical microscope can be operated more reliably, but the drape becomes unsterile and renewed draping is necessary, which consumes time and resources

Engineering Contradiction:
Improvesurgical operation reliabilityVSAvoidre-draping time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The asymmetrical contour of the holding ring is designed in advance to provide the correct positioning and orientation before the surgical operation begins. This preliminary correct positioning eliminates the need for any subsequent repositioning or re-draping during the procedure, saving time and maintaining sterility throughout the entire surgical process.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS11980437B2Holding element for a drape for a surgical microscope
Publication Date: 2024.05.14 CARL ZEISS MEDITEC AG
  • US11980437B2 patent drawing
  • US11980437B2 patent drawing
  • US11980437B2 patent drawing

AI summary

A holding element for a drape for a surgical microscope is provided. The holding element has a holding ring and a recess located in the holding ring for an interface of the surgical microscope. The holding ring has an asymmetrical contour delimiting the recess such that in a condition in which the holding element is fastened to the surgical microscope there is only one possible fastening position of the holding element on the interface of the surgical microscope that corresponds to the contour of the holding ring, in which position an orientation of the holding element relative to the surgical microscope is defined.