Laparoscopic Tissue Imaging Oxygen Saturation Tracking
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Solution Overview
Problem
Existing tissue imaging systems struggle to maintain stable oxygen saturation monitoring in body cavities during laparoscopic surgery, particularly when the imaging instrument's field of view shifts, leading to inaccurate oxygen saturation determination due to the non-contact measurement probe's incidental movement.
Innovation Solution
A tissue imaging system that includes an imaging unit, an area determining unit to track motion, a monitor image generating unit to display oxygen saturation changes, and a location updating unit to adjust the specific area of interest, using spectral images of different wavelength components to accurately measure oxygen saturation and alerting for low levels, ensuring stable monitoring even with field view shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a non-contact measurement probe is used to measure oxygen saturation of blood vessels, then contactless measurement is achieved, but measurement precision deteriorates when the probe shifts position incidentally
Solution Approach 1:
The system continuously captures images of the blood vessel and uses image processing to detect the vessel's position and shape in real-time. Based on this feedback, the measurement probe's position is automatically adjusted to maintain optimal alignment with the blood vessel, ensuring continuous accurate oxygen saturation measurement even during probe movement
Solution Approach 2:
The patent replaces the mechanical manual positioning system with an automated image-based positioning system. Instead of relying on manual probe placement and maintenance, the system uses image capture, processing, and automatic position calculation to substitute the mechanical positioning function, enabling contactless measurement while maintaining precision
2Adaptability or versatility
If the field of view of the imaging instrument shifts incidentally, then imaging flexibility is improved, but oxygen saturation monitoring stability deteriorates
Solution Approach 1:
The system continuously monitors the blood vessel's position through image capture and uses this feedback to dynamically adjust the measurement probe's position. This closed-loop control ensures that even when the field of view shifts, the probe automatically tracks and maintains alignment with the blood vessel, preserving monitoring stability
Solution Approach 2:
The patent implements a dynamic positioning system where the measurement probe's position is continuously updated based on real-time image analysis. Instead of a static fixed-position system, the probe dynamically adapts its position to track the blood vessel's movement and maintain optimal measurement conditions
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 system provides stable and accurate monitoring of oxygen saturation in body tissues within body cavities, even during incidental shifts in the imaging instrument's field of view, ensuring reliable surgical safety by continuously updating the specific area of interest and displaying oxygen saturation changes over time.
Implementation Method 1
The non-contact measurement probe applies measuring light of a predetermined wavelength to the blood vessels, and receives the light reflected by the blood vessels by use of a CCD image sensor or the like
Implementation Method 2
The image sensor generates an image signal according to which the oxygen saturation of the blood vessels is determined
Data Source
AI summary
An in vivo monitoring method in a laparoscope system is provided. An object image is sequentially created with expression of a surface color of an object in a body cavity. A lock area (specific area) is determined within the object image, the lock area being movable by following motion of the object. A monitor image including a graph of oxygen saturation is generated according to a part image included in the object image and located in the lock area. The monitor image is displayed. Preferably, the oxygen saturation of the lock area is acquired according to two spectral data with respect to wavelengths of which an absorption coefficient is different between oxidized hemoglobin and reduced hemoglobin in data of the object image. The object is constituted by a blood vessel.