Fluorescence-Guided Surgery (FGS) represents an important development in modern minimally invasive surgery, bringing advanced visualization into the operating room and allowing surgeons to obtain additional information during selected procedures. At WALS 2025, Dr. R.K. Mishra discussed fluorescence-guided surgery in relation to Stryker's Case in BOX campaign, focusing on how near-infrared fluorescence imaging can complement conventional laparoscopic visualization.

The development of fluorescence imaging is part of a broader transformation in surgery. Conventional surgical visualization depends on white-light imaging, anatomical landmarks, tactile feedback, and the surgeon's experience. Fluorescence introduces another information layer by highlighting specific structures or physiological characteristics under specialized illumination.

From Conventional Visualization to Image-Guided Surgery

In traditional laparoscopic surgery, the surgeon observes the operative field through a camera and monitor. High-definition imaging has already significantly improved visualization compared with direct viewing through small incisions.

The next step is to provide information beyond ordinary anatomy.

Near-infrared fluorescence imaging can make selected structures visible when a fluorescent agent is present. Depending on the clinical application, this can assist with biliary anatomy, vascular perfusion, lymphatic mapping, and other forms of intraoperative visualization.

The WALS 2025 lecture presents this evolution through the experience and perspective of Dr. R.K. Mishra.

Dr. R.K. Mishra's Perspective

Dr. R.K. Mishra is a laparoscopic and robotic surgeon and Director and Chief Surgeon of World Laparoscopy Hospital. His professional profile lists extensive involvement in minimal access surgery as well as research and academic work involving ICG and near-infrared fluorescence cholangiography.

This background is particularly relevant when discussing fluorescence because the usefulness of an imaging system depends not only on the equipment but also on the surgeon's ability to interpret the information and incorporate it into a safe operative workflow.

How Fluorescence Imaging Works

In a typical fluorescence-guided procedure using ICG, the fluorescent agent is administered according to the intended clinical application. A specialized camera then detects fluorescence after illumination with near-infrared light.

The resulting image can highlight structures that may be difficult to distinguish under conventional white light.

This information can be displayed on the surgical monitor, allowing the surgeon to correlate the fluorescent structures with the surrounding anatomy.

The process is therefore a combination of:

Fluorescent agent + near-infrared illumination + specialized camera + surgical interpretation.

Each component contributes to the final image.

Stryker's 1688 AIM 4K Platform

The WLH Case in BOX material describes Stryker's 1688 Advanced Imaging Modalities (AIM) 4K platform as an imaging system incorporating high-definition visualization and fluorescence capabilities.

The significance of such a platform is that fluorescence does not necessarily need to be considered a separate surgical procedure. Instead, it can be incorporated into the surgeon's existing visualization workflow when clinically appropriate.

This allows the surgeon to move between conventional white-light visualization and fluorescence-enhanced imaging according to the needs of the operation.

Biliary Anatomy and Gallbladder Surgery

One of the clearest applications of ICG fluorescence is visualization of the biliary tree during selected laparoscopic procedures.

Laparoscopic cholecystectomy requires careful identification of biliary structures before division. Inflammation, adhesions, anatomical variation, and distorted tissue planes can make this identification more difficult.

Fluorescence cholangiography can provide additional visualization of the cystic duct and other biliary structures.

Dr. Mishra's professional profile includes work on the efficacy and role of near-infrared fluorescence cholangiography using ICG during laparoscopic cholecystectomy.

This application demonstrates the practical value of fluorescence imaging: rather than simply producing a visually impressive image, the technology can provide information relevant to an important surgical safety step.

Perfusion Assessment

Fluorescence can also provide information about tissue perfusion.

In gastrointestinal surgery, surgeons may need to assess whether a segment of bowel has adequate blood supply before creating an anastomosis. ICG fluorescence can provide real-time visualization of perfusion patterns.

The fluorescence signal can be interpreted alongside conventional clinical indicators.

It is important to recognize that fluorescence is an adjunctive assessment tool. It does not eliminate the need to evaluate tissue quality, anatomy, tension, blood supply, and other factors relevant to anastomotic safety.

Lymphatic Visualization

Another application involves lymphatic mapping.

ICG can help visualize lymphatic drainage pathways in selected procedures. This can be useful in sentinel lymph-node mapping and selected oncological procedures.

Fluorescence may make lymphatic channels easier to identify during minimally invasive surgery, potentially supporting more targeted dissection.

Oncology Applications

Fluorescence-guided surgery is an active area of research in oncology.

Different fluorescent agents are being studied for tumor visualization, molecular targeting, lymphatic mapping, and surgical-margin assessment.

Some applications are established or clinically available for particular indications, while others remain investigational.

This distinction is important because the term “fluorescence-guided surgery” encompasses many different technologies and fluorescent agents, each with its own evidence base.

Why Real-Time Imaging Matters

Preoperative CT, MRI, ultrasound, endoscopy, and other investigations provide valuable anatomical and pathological information before surgery.

However, anatomy can change once the operation begins.

Tissues can move, organs can be retracted, inflammation can distort structures, and surgical dissection can expose relationships that were not visible on preoperative imaging.

Real-time fluorescence imaging can therefore provide additional intraoperative information at the moment it is needed.

Integration With Minimally Invasive Surgery

Fluorescence-guided surgery is particularly compatible with laparoscopic surgery because the entire operative field is already being displayed on a monitor.

The fluorescence mode can be incorporated into this visual environment, allowing the surgeon and operating team to observe the same information.

This can also have educational value. Trainees can observe the relationship between conventional anatomy and fluorescence-enhanced anatomy during the same procedure.

Case-Based Learning Through Case in BOX

The Case in BOX concept provides an example-driven method for understanding new surgical technology.

Rather than focusing solely on specifications, the surgeon can see how the technology is applied in a real surgical workflow. The WLH material describes the Case in BOX campaign as an educational setting for demonstrating applications of advanced fluorescence imaging.

This approach can be particularly valuable for surgeons considering the adoption of new visualization technology.

Technology Is an Adjunct, Not a Substitute

An important principle in fluorescence-guided surgery is that technology does not replace surgical anatomy.

A surgeon must still understand the normal and variant anatomy, establish appropriate exposure, dissect carefully, and identify structures before division.

Similarly, fluorescence should not be interpreted in isolation. A fluorescent structure needs to be correlated with the expected anatomy and the clinical situation.

This is particularly important during difficult operations where inflammation or previous surgery has altered normal tissue planes.

Limitations of Fluorescence Imaging

Although fluorescence imaging has significant potential, several limitations remain.

Fluorescence signals can vary according to the dose and timing of the fluorescent agent, tissue characteristics, camera settings, distance, background fluorescence, and other technical factors.

The depth of visualization is also limited. Fluorescence cannot necessarily reveal structures hidden beneath substantial tissue.

There can also be variation in how different surgeons interpret fluorescence intensity.

For these reasons, standardized protocols and appropriate training remain important.

Training the Next Generation of Surgeons

The growing availability of fluorescence imaging creates new training requirements.

Surgeons need to understand:

• How fluorescence imaging works
• Appropriate indications
• Fluorescent-agent characteristics
• Timing and imaging considerations
• Interpretation of fluorescence patterns
• Technical limitations
• Correlation with conventional anatomy
• Appropriate intraoperative decision-making

At World Laparoscopy Hospital, Dr. R.K. Mishra's academic work and surgical training activities provide a context for teaching advanced minimal access technologies. His professional profile also documents his involvement in fluorescence-related research.

Future Directions

The future of fluorescence-guided surgery may extend well beyond simple visualization.

Potential developments include quantitative fluorescence analysis, targeted molecular fluorophores, artificial intelligence-assisted interpretation, automated tissue characterization, integration with robotic surgery, and multimodal image fusion.

Artificial intelligence may eventually help surgeons interpret fluorescence patterns in real time, although such systems will require rigorous clinical validation.

The broader direction is toward a more intelligent operating room in which multiple sources of information are combined to support surgical decision-making.

Educational Message From WALS 2025

Dr. R.K. Mishra's presentation in the Stryker Case in BOX campaign illustrates how advanced imaging can be incorporated into modern minimally invasive surgery.

Fluorescence-guided surgery has applications in biliary visualization, perfusion assessment, lymphatic mapping, selected oncological procedures, and other areas where additional real-time information can support surgical planning.

The technology does not replace the fundamentals of surgery. Instead, it can complement anatomical knowledge, meticulous dissection, appropriate patient selection, and experienced clinical judgment.

For surgeons, residents, fellows, and healthcare professionals interested in advanced laparoscopic and robotic surgery, the WALS 2025 discussion provides an educational overview of the principles, applications, benefits, limitations, and future possibilities of fluorescence-guided surgery.

The collaboration between surgical expertise and advanced imaging technology represents an important direction in the continuing development of precision, image-guided, and minimally invasive surgery.