Effect of surgical microscope and illuminated chopper on anterior chamber temperature

• Type of Material: Article
• Authors: Youngsub Eom, Emory University; Young Joo Lee, Korea University; Jong Suk Song, Korea University; Hyo Myung Kim, Korea University; Dong Heun Nam, Gachon University
• Language: English
• Date: 2023-01-23
• Publisher: BMC
• Publication Version: Final Published Version
• Copyright Statement: © The Author(s) 2023
• License: Creative Commons Attribution 4.0 International
• Final Published Version (URL): http://dx.doi.org/10.1186/s12886-023-02784-w
• Title of Journal or Parent Work: BMC OPHTHALMOLOGY
• Volume: 23
• Issue: 1
• Start Page: 29
• End Page: 29
• Grant/Funding Information: This work was supported by the SNUBH Research Fund [grant numbers 13–2020-007], by a TRC Research Grant of the Korea University Medicine and Korea Institute of Science and Technology, by Korea University Ansan Hospital grant, by Korea University grants (K1625491, K1722121, K1811051, K1913161, and K2010921), by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: 1711174253, RS-2020-KD000296), by Korea Environment Industry & Technology Institute(KEITI) through Technology Development Project for Safety Management of Household Chemical Products, funded by Korea Ministry of Environment(MOE) (2020002960007, NTIS-1485018521), by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (NRF-2021R1F1A1062017), by the Technology development Program(S3127902) funded by the Ministry of SMEs and Startups(MSS, Korea), by the Technology development Program(S3305836) funded by the Ministry of SMEs and Startups(MSS, Korea), and by a Korea Medical Device Development Fund grant funded by the Korean government (Ministry of Science and ICT, Ministry of Trade, Industry and Energy, Ministry of Health & Welfare, and Ministry of Food and Drug Safety) (Project Number: RS-2022-00141533).
• Keywords: Temperature; PHOTOTOXICITY; Life Sciences & Biomedicine; INTRACAMERAL ILLUMINATION; Science & Technology; CATARACT-SURGERY; Ophthalmology; PARAMETERS; Microscope; Illuminated chopper; ENDOILLUMINATION
• Research Categories: Health Sciences, Opthamology

Abstract

Background: To evaluate the effect of the light intensity of the surgical microscope and illuminated chopper on the anterior chamber temperature. Study design: Experimental study. Methods: A model eye (Kitaro WetLab System; FCI Ophthalmics, Pembroke, MA, USA) was used in this experimental study. The illuminance of a surgical microscope (Leica M300; Leica Microsystems, Wetzlar, Germany) and illuminated chopper (iChopper NAM-25 GB; Oculight, Korea) with a light source (iVision; Oculight) was measured using an illuminometer. In addition, the temperature in the anterior chamber of the model eye filled with balanced salt solution when using the surgical microscope with a light intensity from level 1 to level 6 and the illuminated chopper at 99% light intensity was measured for 10 min. Results: The anterior chamber temperature was increased by 0.2, 0.5, 1.0, and 1.4 ℃ when using the surgical microscope at level 3 (10050 lux), 4 (16490 lux), 5 (24900 lux), and 6 (32500 lux), respectively, for 10 min. The illuminated chopper at 99% light intensity (14893 lux) positioned in the anterior chamber increased the anterior chamber temperature by 0.2° C after 10 min, which was equal to the increase in the temperature caused by the surgical microscope at level 3. Conclusion: The photothermal effect of the illuminated chopper directly positioned in the anterior chamber appeared to be similar to that of a microscope with similar illuminance. Therefore, the illuminated chopper is safe in terms of anterior chamber temperature changes in cataract surgery.