Utility and safety of a novel surgical microscope laser light source

Abstract

ObjectiveTissue injuries caused by the thermal effects of xenon light microscopes have previously been reported. Due to this, the development of a safe microscope light source became a necessity. A newly developed laser light source is evaluated regarding its effectiveness and safety as an alternative to conventional xenon light source.MethodsWe developed and tested a new laser light source for surgical microscopes. Four experiments were conducted to compare xenon and laser lights: 1) visual luminance comparison, 2) luminous and light chromaticity measurements, 3) examination and analysis of visual fatigue, and 4) comparison of focal temperature elevation due to light source illumination using porcine muscle samples.ResultsResults revealed that the laser light could be used at a lower illumination value than the xenon light (p < 0.01). There was no significant difference in visual fatigue status between the laser light and the xenon light. The laser light was superior to the xenon light regarding luminous intensity and color chromaticity. The focal temperature elevation of the muscle samples was significantly higher when irradiated with xenon light in vitro than with laser light (p < 0.01).ConclusionThe newly developed laser light source is more efficient and safer than a conventional xenon light source. It lacks harmful ultraviolet waves, has a longer lifespan, a lower focal temperature than that of other light sources, a wide range of brightness and color production, and improved safety for the user’s vision. Further clinical trials are necessary to validate the impact of this new light source on the patient’s outcome and prognosis.

A Novel Intraoperative Laser Light Imaging System to Simultaneously Visualize Visible Light and Near-Infrared Fluorescence for Indocyanine Green Videoangiography

“…The DIVA integrated with laser light enabled us to better visualize visual and fluorescence images compared with xenon light because of the high absorption intensity of the NIR spectrum [5]. …”

“…The system enables the simultaneous observation of the operative field and enhanced blood flow by ICG [ 3 , 4 ]. We also developed a novel laser light source for surgical microscopes [ 5 ]. The effectiveness of DIVA integrated with laser light was evaluated.…”

Mythri 1.0—Progress of an Indian Surgical Robot

“…Newer microscope tools have been developed to enhance surgical visualization such as ORBEYE, a 4K three-dimensional (3D) microvideoscope 3D-Eye-Flex, BrightMatter Servo System (Synaptive Medical). [9][10][11][12][13][14] Sato et al 15 have reported on the use of laser as a lighting source with benefits of a decrease in the heat output and improved visualization. User interfaces for microscopes have also been the focus of some studies.…”

Application of Fluorescein Fluorescence in Vascular Neurosurgery

“…(D–G) Are used with permission from Suzuki et al (37). (I) is copyright of Sato et al (38) and made available under Creative Commons. (J) is used with permission from Ito et al (22).…”

“…Therefore, such illumination offers better contrast. Furthermore, the laser illumination-based microscope produces significantly less tissue heat compared to xenon lamp illumination (38). Although this laser microscope is an early prototype, it provides well-controlled illumination that may benefit future developments of surgical microscopes.…”