Surgical Microscope OCT Integration for Lens Residue Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cataract surgery lacks objective methods for intra- and postoperative evaluation of the posterior lens capsule, leading to residual lens residues and potential 'after-cataract' complications due to subjective capsule polishing, with no means to quantify the completeness of lens removal.
Innovation Solution
Integration of an optical coherence tomograph within a surgical microscope system to scan the eye's lens region, generating diagnostic data on light-reflecting structures for objective assessment of lens residue removal, allowing for automatic monitoring of surgical outcomes and minimizing manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If subjective capsule polishing is performed by feel, then surgical experience and skill are utilized, but objective measurement of lens residue removal is lost
Solution Approach 1:
The patent merges the surgical microscope with the optical coherence tomograph into an integrated system. The OCT device is positioned within the surgical microscope's optical path, allowing simultaneous visualization through the microscope and OCT imaging of the posterior lens capsule. This combination enables objective detection of lens residues while maintaining the surgical workflow, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The integrated system serves multiple functions: the surgical microscope provides magnified visual inspection for surgical operations, while the OCT component adds cross-sectional imaging capability for detecting lens residues and assessing capsule status. This multi-functionality allows a single system to perform both traditional surgical visualization and advanced diagnostic imaging, improving detection precision without requiring separate complex devices.
2Loss of information
If visual inspection is used for lens polishing, then real-time observation is possible, but quantification of surgical outcome is not achievable
Solution Approach 1:
The OCT imaging provides real-time feedback on the completeness of lens residue removal by displaying cross-sectional images of the posterior lens capsule. Surgeons can immediately assess whether polishing is complete and make adjustments accordingly, eliminating the information loss about surgical outcome completeness. The feedback is integrated into the surgical workflow, allowing continuous monitoring without significant time penalty.
Solution Approach 2:
The OCT imaging capability is prepared and integrated into the surgical microscope before the cataract surgery begins. The system is pre-configured to capture and process OCT images of the lens capsule, enabling immediate quantification of lens residue removal as soon as the surgical field is visualized. This preliminary preparation eliminates delays during surgery for setting up separate imaging devices.
3Manufacturing precision
If extensive capsule polishing is performed to remove all residues, then completeness of lens removal is improved, but damage to the posterior capsule increases
Solution Approach 1:
The patent replaces the purely mechanical/subjective capsule polishing process with an optical imaging-based assessment system. Instead of relying on tactile feedback and subjective judgment that require extensive polishing to ensure completeness, the OCT system provides optical visualization of lens residues and capsule integrity. This substitution allows surgeons to achieve complete residue removal with minimal mechanical stress on the capsule by precisely identifying and removing only the necessary residues.
Solution Approach 2:
The OCT imaging acts as an intermediary between the surgeon's polishing actions and the assessment of surgical outcomes. Rather than directly observing the effects of polishing through the microscope or relying on tactile feedback, the OCT provides an intermediate imaging modality that clearly visualizes lens residues and capsule status. This intermediary assessment enables more precise control of the polishing process, achieving completeness while minimizing unnecessary stress on the capsule.
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 precise, objective monitoring of lens residue removal and posterior capsule status during surgery, reducing the risk of 'after-cataract' and improving surgical precision by providing real-time, high-resolution imaging and quantifiable data for surgeons.
Implementation Method 1
Optical coherence tomography (OCT) represents a diagnostically valuable optical image-producing method especially in biomedical optics and in medicine. In optical coherence tomography, low-coherence light of a corresponding light source is split at a beam splitter of an interferometer, e.g. a Michelson interferometer, into a reference arm and a measurement arm.
Implementation Method 2
After reflection at the respective surfaces, the signals of the reference arm and measurement arm are overlaid. Interference between the signals of the two arms yields a pattern from which the relative optical path length can be derived.
Data Source
AI summary
A surgical microscope system (100) for ophthalmology, in particular for cataract surgery, comprising a surgical microscope (10) having an optical viewing unit (13), is proposed, in which an optical coherence tomograph (20) is set up to scan at least a region of a lens (53) of an eye (50) and to generate scan values, and in which a detection unit (30) is set up to generate, on the basis of the scan values, diagnostic data that correspond to light-reflecting structures in the scanned region of the eye (50) and that derive from a plane of the eye (50) that corresponds to an object plane of the surgical microscope (10).