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Adly AS, Adly MS, Cuisinier F, Egea JC, Panayotov I, Adly AS, Malthiery E. Laser-Induced Blood Coagulation for Surgical Application: A Scoping Review. Semin Thromb Hemost 2024; 50:236-252. [PMID: 37611623 DOI: 10.1055/s-0043-1772573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
There is a lack of evidence-based reviews on the effects of laser irradiation on blood coagulation in the literature, despite a large number of clinical trials. We therefore evaluated the available evidence on laser irradiation parameters used in coagulation of blood to optimize physical parameters. We performed a literature search for recent scientific studies indexed between 2017 and 2023 using the databases of PubMed and ScienceDirect. Articles were selected based on defined inclusion and exclusion criteria, and 78 publications in total were eventually included in this scoping review. The following were found to produce significant benefits in blood coagulation for surgical application: (1) dentistry and oral surgeries: 980 nm, 27 s, 2 W, 1502.7 W/cm2, 26.5 J, 622 J/cm2, 400 μm; (2) urogenital disorders: 532 nm, 4 s, 40 W, 10600 W/cm2, 1.3 J, 424 J/cm2, 600 μm; (3) ophthalmic disorders: 810 nm, 1 s, 1 W, 3540 W/cm2, 0.75 J, 1326 J/cm2, 100 μm; (4) embryological surgeries: 1064 nm, 10 s, 25 W, 35400 W/cm2, 262.5 J, 371000 J/cm2, 332.5 μm; (5) dermatological disorders: 1064 nm, 20 W, 2440 W/cm2, 0.1 J, 24 J/cm2, 670 μm; (6) gastrointestinal disorders: 532 nm, 3 s, 20 W, 1051 W/cm2, 120 J, 26500 J/cm2, 760 μm; (7) neurological surgeries: 2.5 s, 1.5 W, 1035 W/cm2, 2 J, 1584 J/cm2, 385 μm; (8) pulmonary disorders: 1320 nm, 5s, 35 W, 12450 W/cm2, 250 J, 65000 J/cm2, 700 μm (9) cardiovascular disorders: 1064 nm, 16.5 s, 5 W, 1980.5 W/cm2, 900 J, 760 J/cm2, 400 μm. In conclusion, our scoping review identifies that combining data from all clinically heterogeneous studies suggests that laser irradiation reflects an effective method for inducing blood coagulation in several medical fields.
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Affiliation(s)
| | - Mahmoud Sedky Adly
- LBN, Univ Montpellier, Montpellier, France
- Royal College of Surgeons of Edinburgh, Scotland, United Kingdom
| | - Frederic Cuisinier
- LBN, Univ Montpellier, Montpellier, France
- CSERD, CHU Montpellier, Montpellier, France
- UFR Odontologie, Univ. Montpellier, Montpellier, France
| | - Jean-Christophe Egea
- LBN, Univ Montpellier, Montpellier, France
- CSERD, CHU Montpellier, Montpellier, France
- UFR Odontologie, Univ. Montpellier, Montpellier, France
| | - Ivan Panayotov
- LBN, Univ Montpellier, Montpellier, France
- CSERD, CHU Montpellier, Montpellier, France
- UFR Odontologie, Univ. Montpellier, Montpellier, France
| | | | - Eve Malthiery
- LBN, Univ Montpellier, Montpellier, France
- CSERD, CHU Montpellier, Montpellier, France
- UFR Odontologie, Univ. Montpellier, Montpellier, France
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Kong AW, Turner ML, Chan H, Stamper RL, Arnold BF, Della Santina L, Ou Y. Asymmetric Functional Impairment of ON and OFF Retinal Pathways in Glaucoma. OPHTHALMOLOGY SCIENCE 2021; 1:100026. [PMID: 35756578 PMCID: PMC9232180 DOI: 10.1016/j.xops.2021.100026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 04/29/2021] [Accepted: 05/03/2021] [Indexed: 11/17/2022]
Abstract
Purpose To investigate ON-pathway versus OFF-pathway dysfunction in glaucoma using handheld electroretinography (ERG) with a temporally modulated sinusoidal flicker stimulus. Design Cross-sectional study. Participants Fifty-nine participants accounting for 104 eyes, comprised of 19 control eyes, 26 glaucoma suspect eyes, and 59 glaucoma eyes. Methods Participants underwent portable ERG testing, which included the photopic flash, photopic flicker, photopic negative response stimulus, ON-OFF stimulus, and a custom-written sinusoidal flicker stimulus that was modulated from 50 to 0.3 Hz. Main Outcome and Measures The ERG response amplitudes were measured by the handheld ERG. For the custom-written sinusoidal flicker stimulus, we derived and compared the log10 first harmonic frequency response amplitudes. Patient discomfort and fatigue after ERG testing were rated on a scale from 1 to 5. Results Baseline demographics were not significantly different between groups, except for ocular characteristics. Analysis was performed adjusting for participant age, sex, race, and dilation status, and the sinusoidal frequency responses were stratified at 10 Hz because higher frequencies are associated with the OFF-pathway, whereas lower frequencies are associated with the ON-pathway. After stratification, glaucoma eyes showed an adjusted decrease of 32.1% at frequencies of more than 10 Hz (95% confidence interval [CI], -51.8% to -4.1%; P = 0.03). For 10 Hz stimulus frequencies or less, an adjusted 11.5% reduction was found (95% CI, -39.5% to 29.1%; P = 0.50). Glaucoma suspect eyes did show a decreased response, but this was not significant at either frequency range. When comparing handheld ERG with traditional visual field assessments, participants found the handheld ERG to result in much less discomfort and fatigue. Conclusions Our finding that glaucoma participants showed greater decreases in ERG response at higher frequencies supports the hypothesis that the OFF-pathway may be more vulnerable in human glaucoma. Using a handheld ERG device with a sinusoidal flicker stimulus may provide an objective assessment of visual function in glaucoma.
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Affiliation(s)
- Alan W. Kong
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
| | - Marcus L. Turner
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
| | - Hoover Chan
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
| | - Robert L. Stamper
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
| | - Benjamin F. Arnold
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
- Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, California
| | - Luca Della Santina
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
- Bakar Computational Health Sciences Institute, University of California, San Francisco, San Francisco, California
| | - Yvonne Ou
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California
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Kong AW, Della Santina L, Ou Y. Probing ON and OFF Retinal Pathways in Glaucoma Using Electroretinography. Transl Vis Sci Technol 2020; 9:14. [PMID: 33117606 PMCID: PMC7571283 DOI: 10.1167/tvst.9.11.14] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 09/14/2020] [Indexed: 12/31/2022] Open
Abstract
Glaucoma is a progressive neurodegenerative disease involving damage and eventually death of retinal ganglion cells (RGCs) that comprise the optic nerve. This review summarizes current understanding of specific RGC type vulnerability in glaucoma and how electroretinography (ERG) may provide an objective measure of these functional perturbations. There is building evidence to suggest that ON RGCs, which respond to light increments, may be more resilient to elevated intraocular pressure and glaucoma, whereas OFF RGCs, which respond to light decrements, may be more susceptible. ERG experiments in nonhuman primates and mice have also shown that the ON- and OFF-pathways can be separated using a variety of techniques such as pattern ERG and the photopic negative response. Another ERG paradigm of interest to separate the ON and OFF responses is a flicker stimulus at varying temporal frequencies. Response to lower temporal frequencies is associated with the ON-pathway, and ERG response to higher frequencies is associated with the OFF-pathway. In mice, experimental glaucoma models have shown greater decreases in ERG response at higher frequencies, suggesting that the OFF-pathway is more susceptible. We also summarize current clinical ERG protocols used for glaucoma and discuss innovations for developing new types of stimuli that can further separate the ON- and OFF-pathways. Applying these novel paradigms that distinguish ON- and OFF-pathways may ultimately improve glaucoma diagnostics and monitoring of glaucoma progression.
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Affiliation(s)
- Alan W Kong
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, USA
| | - Luca Della Santina
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, USA
| | - Yvonne Ou
- Department of Ophthalmology, University of California, San Francisco, San Francisco, California, USA
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