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Lee SH, Tseng BY, Wu MC, Wang JH, Chiu CJ. Incidence and Progression of Diabetic Retinopathy After Cataract Surgery: A Systematic Review and Meta-Analysis. Am J Ophthalmol 2024:S0002-9394(24)00379-9. [PMID: 39179126 DOI: 10.1016/j.ajo.2024.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 08/01/2024] [Accepted: 08/14/2024] [Indexed: 08/26/2024]
Abstract
PURPOSE The impact of cataract surgery on diabetic retinopathy (DR) in patients with diabetes mellitus (DM) remains uncertain. This study aimed to investigate the incidence and progression of DR in patients with DM who underwent cataract surgery. DESIGN Meta-analysis. METHODS A systematic search of PubMed, Cochrane CENTRAL, and Embase databases was conducted from inception to April 2024. Randomized controlled trials or observational cohort studies involving adult patients with DM who underwent cataract surgery were included. Studies reporting data on the incidence or progression of postoperative DR were considered. Effect sizes were determined using risk ratios (RRs) with 95% confidence intervals (CIs), and meta-analysis was performed using a random-effects model. Subgroup analysis and meta-regression were conducted on perioperative demographic factors such as types of cataract surgery, DM durations, preoperative glycated hemoglobin A1c levels, and postoperative follow-up durations. RESULTS Data from 15 studies, involving 7,287 patients were analyzed. Postoperative DR incidence was elevated compared to the control group (RR, 1.38; 95% CI, 1.16-1.63; p < 0.001), although not significantly different in paired studies (RR, 0.85; 95% CI, 0.39-1.83; p = 0.671). DR progression was significantly higher after cataract surgery (RR, 1.46; 95% CI, 1.28-1.66; p < 0.001), irrespective of cataract surgery type and study design. Our analysis also revealed a significant increase in DR progression to sight-threatening DR, which includes clinically significant macular edema and proliferative diabetic retinopathy, following cataract surgery (RR, 1.84; 95% CI, 1.21-2.81; p = 0.005). Additionally, various risk factors such as preoperative HbA1c level, duration of postoperative follow-up, duration of diabetic diagnosis, age, and use of insulin therapy were investigated, However, none of these parameters significantly influenced the incidence or progression of postoperative DR. CONCLUSIONS Further research is needed to fully understand the incidence of DR after cataract surgery. However, our study provides moderate evidence supporting the progression of DR following such surgical interventions. Therefore, it is imperative to closely monitor DR progression within one year following cataract surgery in patients with DM.
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Affiliation(s)
- Ssu-Hsien Lee
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Bor-Yuan Tseng
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Meng-Chien Wu
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Jen-Hung Wang
- Department of Medical Research, Buddhist Tzu Chi General Hospital, Hualien 970, Taiwan
| | - Cheng-Jen Chiu
- Department of Ophthalmology and Visual Science, Tzu Chi University, Hualien 970, Taiwan; Department of Ophthalmology, Hualien Tzu Chi Hospital, the Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan.
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Wu S, Yao D, Hua S, Li X, Shi Y. Comparison of effect and safety of phacoemulsification surgery performed by resident and attending physicians. Front Med (Lausanne) 2024; 11:1401482. [PMID: 39175816 PMCID: PMC11339789 DOI: 10.3389/fmed.2024.1401482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 07/31/2024] [Indexed: 08/24/2024] Open
Abstract
Aim The objective of this study is to compare the effect and safety of phacoemulsification surgery performed by resident and attending physicians. Methods This was a retrospective study. Eyes with cataract who underwent phacoemulsification surgery at the First Affiliated Hospital of Ningbo University between January 2021 and December 2023 were reviewed. All the patients were followed up for at least 12 months and were divided into two groups according to the surgery performer. SPSS was used to analyze data, considering p < 0.05 significant. Results Overall, 316 patients with cataract in group 1 (surgery performed by resident physician, n = 181) and group 2 (surgery performed by attending physician, n = 135) were reviewed. There were no statistically significant differences in patient demographics variables and cataract grade between the groups. The resident surgeon used more cumulative dissipate energy (15.00 ± 7.25 vs. 10.83 ± 6.52, p < 0.001) and operation time (20.46 ± 5.69 vs. 12.59 ± 4.61 min, p < 0.001) to complete the surgery. Also, the ECL in group 1 was higher (14.87 ± 5.00 vs. 10.77 ± 4.46, p < 0.001). The eyes had significant visual improvement in both groups postoperatively (p < 0.05), but at the 12-month follow-up, eyes in group 2 had better best-corrected visual acuity [0.10 (0.00, 0.22) vs. 0.10 (0.10, 0.22) logMAR, p = 0.039]. Except for month 1, the intraocular pressure was no statistical difference in group 1 and group 2 (14.65 ± 2.52 vs. 15.30 ± 2.34 mmHg, p = 0.019). Cases in group 1 were more likely to undergo intraoperative and postoperative complications (37 vs. 14, p = 0.031), including cornea edema (p = 0.025), capsule tear (p = 0.044), and posterior capsular opacification (p = 0.027). Conclusion The effect of phacoemulsification surgery performed by the resident physician is satisfying, but compared to the attending physician, the higher probability of complications should be paid more attention.
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Affiliation(s)
| | | | | | | | - Yan Shi
- Department of Ophthalmology, The First Affiliated Hospital of Ningbo University, Ningbo, China
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3
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Schnider C, Yuen L, Rampat R, Zhu D, Dhallu S, Trinh T, Gurnani B, Abdelmaksoud A, Bhogal-Bhamra G, Wolffsohn JS, Naroo SA. BCLA CLEAR presbyopia: Management with intraocular lenses. Cont Lens Anterior Eye 2024; 47:102253. [PMID: 39068141 DOI: 10.1016/j.clae.2024.102253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Cataract surgery including intraocular lens (IOL) insertion, has been refined extensively since the first such procedure by Sir Harold Ridley in 1949. The intentional creation of monovision with IOLs using monofocal IOL designs has been reported since 1984. The first reported implantation of multifocal IOLs was published in 1987. Since then, various refractive and or diffractive multifocal IOLs have been commercialised. Most are concentric, but segmented IOLs are also available. The most popular are trifocal designs (overlaying two diffractive patterns to achieve additional focal planes at intermediate and near distances) and extended depth of focus designs which leave the patient largely spectacle independent with the reduced risk of bothersome contrast reduction and glare. As well as mini-monovision, surgical strategies to minimise the impact of presbyopia with IOLs includes mixing and matching lenses between the eyes and using IOLs whose power can be adjusted post-implantation. Various IOL designs to mimic the accommodative process have been tried including hinge optics, dual optics, lateral shifts lenses with cubic-type surfaces, lens refilling and curvature changing approaches, but issues in maintaining the active mechanism with post-surgical fibrosis, without causing ocular inflammation, remain a challenge. With careful patient selection, satisfaction rates with IOLs to manage presbyopia are high and anatomical or physiological complications rates are no higher than with monofocal IOLs.
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Affiliation(s)
| | - Leonard Yuen
- ONE Medical Doctors Group & Day Surgical Centre, Quarry Bay, Hong Kong
| | | | - Dagny Zhu
- NVISION Eye Centers Rowland Heights, CA, USA
| | - Sandeep Dhallu
- Department of Clinical, Pharmaceutical and Biological Science, University of Hertfordshire, Hatfield, UK
| | - Tanya Trinh
- Mosman Eye Clinic, Sydney, New South Wales, Australia; Sydney Hospital and Sydney Eye Hospital, New South Wales, Australia
| | - Bharat Gurnani
- Gomabai Netralaya and Research Centre, Neemuch, Madhya Pradesh, India
| | | | | | - James S Wolffsohn
- College of Health & Life Sciences, Aston University, Birmingham, United Kingdom
| | - Shehzad A Naroo
- College of Health & Life Sciences, Aston University, Birmingham, United Kingdom.
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Hsu K, da Silva EG. The argument for two-handed cataract surgery in veterinary ophthalmology. Vet Ophthalmol 2024. [PMID: 39030816 DOI: 10.1111/vop.13244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/16/2024] [Accepted: 05/22/2024] [Indexed: 07/22/2024]
Abstract
Despite access to contemporary phacoemulsification technology and the strong shift to two-handed nucleofractis techniques in human medicine, a one-handed, single incision approach has persisted among Diplomates of the American College of Veterinary Ophthalmologists. The perpetuation of techniques such as bowl-sculpting one-handed phacoemulsification in veterinary medicine is multifactorial; it is likely associated with the lack of two-handed training in residency programs, the challenges of learning on complex cases, the ease of teaching one-handed versus two-handed techniques to a resident, and the lack of specific instrumentation available designed for larger lens size, among other factors. Additionally, variation in globe and palpebral fissure size in veterinary patients complicates the training of cataract surgery. Finally, many mentors or mentors' mentors, were trained alongside previous generations of MD surgeons who performed bowl sculpting techniques during the transition from extracapsular cataract extraction to phacoemulsification, and understandably, are not comfortable teaching a two-handed technique consistently. The authors have observed an unwillingness to convert from one-handed to two-handed technique in the post-residency career for most veterinary ophthalmologists; this could be due to the high expectations becoming a specialist, especially when the stakes are as high as in phacoemulsification. Therefore, the authors advocate for hands-on training in multiple nucleofractis techniques, including two-handed methods during residency training. Simply put, if residents are not trained and comfortable with two-handed techniques by the end of residency, they are less likely to make further changes later in their career. In this article, we aim to explore the proposed rates of one-handed versus two-handed mentors currently teaching veterinary phacoemulsification, the history of cataract surgery, and to discuss the benefits of two-handed nucleofractis techniques. The authors will also illustrate and provide videos as well as some tools for veterinary ophthalmologists wishing to learn two-handed techniques.
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Affiliation(s)
- Kimberly Hsu
- True North Veterinary Eye Care, Winnipeg, Manitoba, Canada
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Guedes J, Pereira SF, Amaral DC, Hespanhol LC, Faneli AC, Oliveira RDC, Mora-Paez DJ, Fontes BM. Phaco-Chop versus Divide-and-Conquer in Patients Who Underwent Cataract Surgery: A Systematic Review and Meta-Analysis. Clin Ophthalmol 2024; 18:1535-1546. [PMID: 38827775 PMCID: PMC11144406 DOI: 10.2147/opth.s463525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 05/21/2024] [Indexed: 06/05/2024] Open
Abstract
Background Cataract surgery is one of the most frequently performed eye surgeries worldwide, and among several techniques, phacoemulsification has become the standard of care due to its safety and efficiency. We evaluated the advantages and disadvantages of two phacoemulsification techniques: phaco-chop and divide-and-conquer. Methods PubMed, Cochrane, Embase, and Web of Science databases were queried for randomized controlled trial (RCT), prospective and retrospective studies that compared the phaco-chop technique over the divide-and-conquer technique and reported the outcomes of (1) Endothelial cell count change (ECC); (2) Ultrasound time (UST); (3) Cumulated dissipated energy (CDE); (4) Surgery time; and (5) Phacoemulsification time (PT). Heterogeneity was examined with I2 statistics. A random-effects model was used for outcomes with high heterogeneity. Results Nine final studies, (6 prospective RCTs and 3 observational), comprising 837 patients undergoing phacoemulsification. 435 (51.9%) underwent the phaco-chop technique, and 405 (48.1%) underwent divide-and-conquer. Overall, the phaco-chop technique was associated with several advantages: a significant difference in ECC change postoperatively (Mean Difference [MD] -221.67 Cell/mm2; 95% Confidence Interval [CI] -401.68 to -41.66; p < 0.02; I2=73%); a shorter UST (MD -51.16 sec; 95% CI -99.4 to -2.79; p = 0.04; I2=98%); reduced CDE (MD -8.68 units; 95% CI -12.76 to -4.60; p < 0.01; I2=84%); a lower PT (MD -55.09 sec; 95% CI -99.29 to -12.90; p = 0.01; I2=100). There were no significant differences in surgery time (MD -3.86 min; 95% CI -9.55 to 1.83; p = 0.18; I2=99%). Conclusion The phaco-chop technique proved to cause fewer hazards to the corneal endothelium, with less delivered intraocular ultrasound energy when compared to the divide-and-conquer technique.
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Affiliation(s)
- Jaime Guedes
- Glaucoma Research Center, Wills Eye Hospital, Philadelphia, PA, USA
- Ophthalmology, Opty Group, Rio de Janeiro, RJ, Brazil
| | | | - Dillan Cunha Amaral
- Faculty of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Larissa C Hespanhol
- Faculty of Medicine, Federal University of Campina Grande, Campina Grande, PB, Brazil
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Tahiri R, Albou-Ganem C, Gatinel D, Sandali O. Editorial: Innovations in cataract surgery. Front Med (Lausanne) 2024; 11:1367577. [PMID: 38323036 PMCID: PMC10844549 DOI: 10.3389/fmed.2024.1367577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 01/15/2024] [Indexed: 02/08/2024] Open
Affiliation(s)
- Rachid Tahiri
- Department of Ambulatory Surgery, Avranches Granville Hospital, Granville, France
| | - Cati Albou-Ganem
- Department of Ophthalmology, Vision Clinic of Paris, Paris, France
| | - Damien Gatinel
- Department of Ophthalmology, Rothschild Foundation Hospital, Paris, France
| | - Otman Sandali
- Department of Ambulatory Surgery, Guillaume de Varye Clinic, Bourges, France
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Sinha A, Morya AK, Gupta V, Prasad R. A randomized controlled trial to assess safety and efficacy between terminal chop, stop and chop, and direct chop. Indian J Ophthalmol 2023; 71:3658-3662. [PMID: 37991300 PMCID: PMC10788760 DOI: 10.4103/ijo.ijo_505_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 06/07/2023] [Accepted: 06/27/2023] [Indexed: 11/23/2023] Open
Abstract
PURPOSE The goal in developing new techniques of cataract surgery is to provide a safer, more efficient surgical experience with the lowest complication rate and endothelial cell loss. We compared the efficiency and safety of stop-and-chop, direct chop, and the novel terminal chop techniques of nuclear fragmentation for cataracts grade II-V. METHODS We conducted a prospective randomized clinical trial comparing three different techniques of phacoemulsification, namely, stop-and-chop, direct chop, and terminal chop to assess any differences between them and to establish whether any one method was superior to the others. The pre- and postoperative parameters studied, included central corneal thickness (CCT), ultrasonic time (UST), endothelial cell density (CD), cell loss and effective phacoemulsification time (EPT), average cumulative dissipative energy (CDE), and best-corrected visual acuity, among others. RESULTS 307 eyes were recruited to the study, 102 were recruited to the stop-and-chop group, 103 to the direct chop group, and 102 to the terminal chop group. Statistical differences were found between the techniques with regard to postoperative CCT among NS II (P. 0001) and NS IV cataracts (P = .005) with the lowest values in the terminal chop group among NS II, NS III, and NS IV cataracts. Endothelial cell loss was minimum with a terminal chop in NS II (P = .018) and NS IV cataracts (P = .245). CDE was minimum in terminal chop across different cataract densities. CONCLUSION Terminal chop showed improvement over the other two techniques in terms of CDE and was comparable to them with regard to other parameters.
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Affiliation(s)
- Aprajita Sinha
- Trauma, Ocular Surface and Refractive Surgery, Department of Ophthalmology, Worcestershire Acute Hospitals NHS Trust, England
| | - Arvind Kumar Morya
- Department of Ophthalmology, Resident RP Eye Institute, New Delhi, India
| | - Vinita Gupta
- Glaucoma, Refractive, Squint, Pediatric Ophthalmology and Medical Retina Services, All India Institute of Medical Sciences, Bibinagar, Hyderabad, Telangana, India
| | - Ripunjay Prasad
- Glaucoma Services, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India
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Silverman RH. Principles of Ophthalmic Ultrasound. EXPERT REVIEW OF OPHTHALMOLOGY 2023; 18:379-389. [PMID: 38370284 PMCID: PMC10871633 DOI: 10.1080/17469899.2023.2277781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/27/2023] [Indexed: 02/20/2024]
Abstract
Introduction Ultrasound imaging of the eye was introduced over 50 years ago. While the physical principles of ultrasound imaging have not changed, technology has undergone tremendous and ongoing development. Areas covered The fundamentals of ultrasound physics, biometry (A-scan), structural imaging (B-scan) and blood-flow imaging and measurement (Doppler) will be described. Emphasis will be placed on technological development and potential future advances. Expert opinion While A- and B-scan ultrasound of the eye has traditionally been performed with focused single-element transducers, the introduction of annular and linear arrays has enhanced clinical utility. Future advances, especially in multielement arrays, and point-of-care systems promise amazing new capabilities for diagnostic imaging of the eye and orbit.
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Arad T, Awiszus L, Ackermann H, Schmack I, Kohnen T. Anterior Segment Biometry in a Caucasian Population with Cataracts. Curr Eye Res 2023; 48:930-938. [PMID: 37408497 DOI: 10.1080/02713683.2023.2233119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 06/30/2023] [Indexed: 07/07/2023]
Abstract
PURPOSE To investigate biometric factors of the anterior segment of phakic eyes with cataracts. METHODS This population-based study included Caucasian patients with cataracts in the University Eye Hospital, Goethe University Frankfurt, Germany. Biometric parameters were measured using the swept-source optical coherence tomography method. Patients were grouped into intermediate stages based on decades of life. RESULTS In total, 6289 eyes of 3615 patients (age: 70.67 ± 8.42 years) were included. Age-related reductions in the anterior chamber depth (mean ± standard deviation) decreased from 3.26 ± 0.42 mm (group A: 55-59 years) to 2.94 ± 0.4 mm (group G: 85-89 years), and those in the axial length decreased from 24.37 ± 1.87 mm (group A) to 23.39 ± 1.07 mm (group G). Likewise, the white-to-white distance decreased from 12.12 ± 0.48 mm (group A) to 11.96 ± 0.47 mm (group G). Lens thickness tended to increase accordingly from 4.39 ± 0.36 µm (group A) to 4.9 ± 0.40 µm (group G). A comparison of the eyes showed no detectable lateral difference regarding the biometric parameters between the groups (axial length: p = 0.26, Rosenthal effect size = 0.03; lens thickness: p = 0.12, R = 0.03; anterior chamber depth: p = 0.63, Rosenthal effect size = 0.01). The axial length and anterior chamber depth differed significantly between sexes (r = 0.22, p < 0.0001 and r = 0.16, p < 0.0001, respectively). Multiple regression analysis of the anterior chamber depth as a function of biometry parameters as well as age and sex additionally indicated a positive correlation of anterior chamber depth with white-to-white distance (b = 0.32, p = 10-5), axial length (b = 0.10, p = 10-5), keratometry (b = 0.07, p = 10-5), and lens thickness (b=-0.05, p = 10-5) with a high effect size (Cohen f2=1.866, p = 10-5) and strong multiple correlation coefficient (Rosenthal effect size = 0.80, p = 10-5). CONCLUSIONS In the anterior segment, there are age- and sex-dependent changes in biometric parameters. In addition, changes in anterior chamber depth were noted in relation to white-to-white distance, axial length, keratometry, and lens thickness. These data should be considered in lens calculation formulas.
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Affiliation(s)
- Tschingis Arad
- Department of Ophthalmology, Goethe University, Frankfurt, Germany
| | - Lucas Awiszus
- Department of Ophthalmology, Goethe University, Frankfurt, Germany
| | - Hanns Ackermann
- Institute for Biostatistics, Goethe University, Frankfurt, Germany
| | - Ingo Schmack
- Department of Ophthalmology, Goethe University, Frankfurt, Germany
| | - Thomas Kohnen
- Department of Ophthalmology, Goethe University, Frankfurt, Germany
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Tung HF, Chen YL, Chen CL, Gee MJ, Muo CH, Chiu SL. How Cultural Behaviors and Superstitions Associate the Willingness to Undergo Cataract Surgery in Taiwan: A Nationwide Survey. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59050973. [PMID: 37241205 DOI: 10.3390/medicina59050973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/17/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023]
Abstract
Background and Objectives: Cultural beliefs influence the conceptualization, adaptation, and coping strategies for diseases. This study aimed to investigate the impact of cultural beliefs and customs on the willingness to undergo cataract surgery in Taiwan. Materials and Methods: The data were retrospectively retrieved from the national Longitudinal Health Insurance Database 2000 (LHID2000). From the national database, we enrolled patients that were diagnosed with cataracts and underwent cataract surgery from 2001 to 2010. All the patients were stratified according to their gender and living area. Gender was categorized as male or female, and the living area was classified as urban or rural. We compared the difference in the number of surgeries between stratified patient groups in each Chinese lunar month. Results: The number of cataract surgeries decreased significantly in the seventh and twelfth lunar months for both genders. There was a significant reduction in cataract surgeries in both the urban and rural groups during the seventh lunar month. Interestingly, only the seventh lunar month had an association with sex in different living areas, which meant that in the seventh month, there was a gender-specific difference in the surgical numbers. Conclusions: The Taiwanese population holds a belief that surgical procedures, including cataract surgery, during the lunar ghost month is inauspicious. Citizens tend to avoid elective surgery due to cultural practice, resulting in a decrease in surgical numbers during the period of the Chinese New Year. The authorities should consider these cultural behaviors when developing medical policies and allocating resources. Healthcare providers should be aware of these superstitions and take them into account when providing medical care and advice to patients.
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Affiliation(s)
- Hsiao-Fan Tung
- Department of Ophthalmology, Changhua Christian Hospital, Changhua 500, Taiwan
| | - Yi-Ling Chen
- Surgery Clinical Research Center, Changhua Christian Hospital, Changhua 500, Taiwan
| | - Chiu-Liang Chen
- Department of Orthopedics, Changhua Christian Hospital, Changhua 500, Taiwan
- Department of Nursing, Hungkuang University, Taichung 433, Taiwan
| | - Mei-Jih Gee
- Department of Statistics, Feng-Chia University, Taichung 407, Taiwan
| | - Chih-Hsin Muo
- Management Office for Health Data, China Medical University Hospital, Taichung 404, Taiwan
| | - Shin-Lin Chiu
- Department of Ophthalmology, Changhua Christian Hospital, Changhua 500, Taiwan
- College of Nursing and Health Sciences, Da-Yeh University, Changhua 515, Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 402, Taiwan
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Evaluation of the Corneal Endothelium Following Cataract Surgery in Diabetic and Non-Diabetic Patients. Diagnostics (Basel) 2023; 13:diagnostics13061115. [PMID: 36980422 PMCID: PMC10047116 DOI: 10.3390/diagnostics13061115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/09/2023] [Accepted: 03/14/2023] [Indexed: 03/17/2023] Open
Abstract
The aim of this study was to evaluate the influence of phacoemulsification cataract surgery on the state of the corneal endothelium in diabetic versus non-diabetic patients. We compared the corneal cell morphology in 48 diabetics with good glycemic control and 72 non-diabetic patients before and after uneventful phacoemulsification. Corneal cell density, central corneal thickness, and hexagonality were measured preoperatively and post-surgery (at 1 and 4 weeks) by specular microscopy. The effect of age, gender, axial length, and anterior chamber depth on the parameters of the corneal endothelium were evaluated. We noticed a drop in the endothelial density in both groups postoperatively: a mean endothelial cell loss of 472.7 ± 369.1 in the diabetic group was recorded versus 165.7 ± 214.6 mean loss in the non-diabetic group after the first week. A significant increase in central corneal thickness was also noticed in both groups one week after phacoemulsification, but no statistical significance after 4 weeks in the diabetic group. In terms of cell hexagonality, statistically significant differences were noticed after 4 weeks in both groups. Overall, a significant difference between diabetic and non-diabetic population was noticed in terms of corneal endothelial cell loss after uneventful phacoemulsification cataract surgery. Routine specular microscopy and HbA1c evaluation is recommended before cataract surgery, while intraoperative precautions and high monitorisation in terms of pacho power intensity and ultrasound energy, along with a proper application of the dispersive viscoelastic substances are essential to reduce the risk of endothelial damage.
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12
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Claessens JLJ, Wanten JC, Bauer NJC, Nuijts RMMA, Findl O, Huemer J, Imhof SM, Wisse RPL. Remote follow-up after cataract surgery (CORE-RCT): study protocol of a randomized controlled trial. BMC Ophthalmol 2023; 23:41. [PMID: 36717799 PMCID: PMC9885558 DOI: 10.1186/s12886-023-02779-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 01/10/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Cataract surgery has become one of the most performed surgical procedures worldwide. Postoperative management consists of routine clinical examinations to assess post-operative visual function and detect possible adverse events. Due to the low incidence of complications, the majority of clinic visits after cataract surgery are uneventful. Nonetheless, valuable time and hospital resources are consumed. We hypothesize that remote post-operative follow-up involving teleconsultations and self-assessments of visual function and health status, could be a valid alternative to face-to-face clinical examinations in selected patient groups. The practice of remote follow-up after cataract surgery has not yet been evaluated. The aim of this study is to investigate the validity, safety and cost-effectiveness of remote cataract surgery follow-up, and to report on the patients' experiences with remotely self-assessing visual function. METHODS This study is a multicenter, open-label, randomized controlled trial. Patients planned for cataract surgery on both eyes, without ocular comorbidities, are eligible for participation. Participants will be allocated (1:1) into one of the two study groups: 'telemonitoring' or 'usual care'. Participants in the 'telemonitoring' group will perform in-home assessments after cataract surgery (remote web-based eye exams and digital questionnaires on their own devices). Participants in the 'usual care' group will have regular post-operative consultations, according to the study site's regular practice. Outcome measures include accuracy of the web-based eye exam for assessing visual acuity and refraction, patient-reported outcome measures (visual function and quality of life), adverse events, and cost aspects. DISCUSSION Investigating remote follow-up after cataract surgery fits the current trends of digitization of health care. We believe that remote self-care can be a promising avenue to comply with the increasing demands of cataract care. This randomized controlled trial provides scientific evidence on this unmet need and delivers the desired insights on (cost)effectiveness of remote follow-up after cataract surgery. TRIAL REGISTRATION ClinicalTrials.gov: NCT04809402. Date of registration: March 22, 2021.
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Affiliation(s)
- Janneau L. J. Claessens
- grid.7692.a0000000090126352Department of Ophthalmology, University Medical Center Utrecht, Postbus 85500, Huispostnummer E03.136, Utrecht, 3508 GA the Netherlands
| | - Joukje C. Wanten
- grid.412966.e0000 0004 0480 1382University Eye Clinic Maastricht, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Noël J. C. Bauer
- grid.412966.e0000 0004 0480 1382University Eye Clinic Maastricht, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Rudy M. M. A. Nuijts
- grid.412966.e0000 0004 0480 1382University Eye Clinic Maastricht, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Oliver Findl
- grid.413662.40000 0000 8987 0344Vienna Institute for Research in Ocular Surgery, a Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria
| | - Josef Huemer
- grid.413662.40000 0000 8987 0344Vienna Institute for Research in Ocular Surgery, a Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria ,grid.436474.60000 0000 9168 0080Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Saskia M. Imhof
- grid.7692.a0000000090126352Department of Ophthalmology, University Medical Center Utrecht, Postbus 85500, Huispostnummer E03.136, Utrecht, 3508 GA the Netherlands
| | - Robert P. L. Wisse
- grid.7692.a0000000090126352Department of Ophthalmology, University Medical Center Utrecht, Postbus 85500, Huispostnummer E03.136, Utrecht, 3508 GA the Netherlands
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13
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Petrella L, Nunes S, Perdigão F, Gomes M, Santos M, Pinto C, Morgado M, Travassos A, Santos J, Caixinha M. Feasibility assessment of the Eye Scan Ultrasound System for cataract characterization and optimal phacoemulsification energy estimation: protocol for a pilot, nonblinded and monocentre study. Pilot Feasibility Stud 2022; 8:219. [PMID: 36175978 PMCID: PMC9520812 DOI: 10.1186/s40814-022-01173-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/15/2022] [Indexed: 11/17/2022] Open
Abstract
Background Cataracts are lens opacifications that are responsible for more than half of blindness cases worldwide, and the only treatment is surgical intervention. Phacoemulsification surgery, the most frequently performed cataract surgery in developed countries, has associated risks, some of which are related to excessive phacoemulsification energy levels and times. The protocol proposed in herein will be used to evaluate the feasibility of a new experimental medical device, the Eye Scan Ultrasound System (ESUS), for the automatic classification of cataract type and severity and quantitative estimation of the optimal phacoemulsification energy. Methods The pilot study protocol will be used to evaluate the feasibility and safety of the ESUS in clinical practice. The study will be conducted in subjects with age-related cataracts and on healthy subjects as controls. The procedures include data acquisition with the experimental ESUS, classification based on the Lens Opacity Classification System III (LOCS III, comparator) using a slit lamp, contrast sensitivity test, optical coherence tomography, specular microscopy and surgical parameters. ESUS works in A-scan pulse-echo mode, with a central frequency of 20 MHz. From the collected signals, acoustic parameters will be extracted and used for automatic cataract characterization and optimal phacoemulsification energy estimation. The study includes two phases. The data collected in the first phase (40 patients, 2 eyes per patient) will be used to train the ESUS algorithms, while the data collected in the second phase (10 patients, 2 eyes per patient) will be used to assess the classification performance. System safety will be monitored during the study. Discussion The present pilot study protocol will evaluate the feasibility and safety of the ESUS for use in clinical practice, and the results will support a larger clinical study for the efficacy assessment of the ESUS as a diagnostic tool. Ultimately, the ESUS is expected to represent a valuable tool for surgical planning by reducing complications associated with excessive levels of phacoemulsification energy and surgical times, which will have a positive impact on healthcare systems and society. The study is not yet recruiting. Trial registration ClinicalTrials.gov identifier NCT04461912, registered on July 8, 2020.
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Affiliation(s)
- Lorena Petrella
- Department of Electrical and Computer Engineering, Univ Coimbra, 3030-290, Coimbra, Portugal. .,Centre for Mechanical Engineering, Materials and Processes, Univ Coimbra, 3030-788, Coimbra, Portugal. .,Centre for Informatics and Systems of the University of Coimbra, Univ Coimbra, 3030-290, Coimbra, Portugal.
| | - Sandrina Nunes
- Coimbra Institute for Clinical and Biomedical Research, Univ Coimbra, 3000-548, Coimbra, Portugal
| | - Fernando Perdigão
- Department of Electrical and Computer Engineering, Univ Coimbra, 3030-290, Coimbra, Portugal.,Instituto de Telecomunicações, 3030-290, Coimbra, Portugal
| | - Marco Gomes
- Department of Electrical and Computer Engineering, Univ Coimbra, 3030-290, Coimbra, Portugal.,Instituto de Telecomunicações, 3030-290, Coimbra, Portugal
| | - Mário Santos
- Department of Electrical and Computer Engineering, Univ Coimbra, 3030-290, Coimbra, Portugal.,Centre for Mechanical Engineering, Materials and Processes, Univ Coimbra, 3030-788, Coimbra, Portugal
| | - Carlos Pinto
- Department of Electrical and Computer Engineering, Univ Coimbra, 3030-290, Coimbra, Portugal.,Instituto de Telecomunicações, 3030-290, Coimbra, Portugal
| | - Miguel Morgado
- Coimbra Institute for Biomedical Imaging and Translational Research, Univ Coimbra, 3004-516, Coimbra, Portugal.,Department of Physics, Univ Coimbra, 3004-516, Coimbra, Portugal
| | | | - Jaime Santos
- Department of Electrical and Computer Engineering, Univ Coimbra, 3030-290, Coimbra, Portugal.,Centre for Mechanical Engineering, Materials and Processes, Univ Coimbra, 3030-788, Coimbra, Portugal
| | - Miguel Caixinha
- Centre for Mechanical Engineering, Materials and Processes, Univ Coimbra, 3030-788, Coimbra, Portugal.,Department of Physics, Univ Beira Interior, 6291-001, Covilhã, Portugal
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14
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Sheppard WEA, McCarrick D, Wilkie RM, Baraas RC, Coats RO. A Systematic Review of the Effects of Second-Eye Cataract Surgery on Motor Function. FRONTIERS IN AGING 2022; 3:866823. [PMID: 35821847 PMCID: PMC9261376 DOI: 10.3389/fragi.2022.866823] [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: 01/31/2022] [Accepted: 05/16/2022] [Indexed: 11/16/2022]
Abstract
Cataract removal surgery is one of the most commonly performed surgical procedure in developed countries. The financial and staff resource cost that first-eye cataract surgery incurs, leads to restricted access to second-eye cataract surgery (SES) in some areas, including the United Kingdom. These restrictions have been imposed despite a lack of knowledge about the impact of not performing SES on visuo-motor function. To this end, a systematic literature review was carried out, with the aim of synthesising our present understanding of the effects of SES on motor function. Key terms were searched across four databases, PsycINFO, Medline, Web of Science, and CINAHL. Of the screened studies (K = 499) 13 met the eligibility criteria. The homogeneity between participants, study-design and outcome measures across these studies was not sufficient for meta-analyses and a narrative synthesis was carried out. The evidence from objective sources indicates a positive effect of SES on both mobility and fall rates, however, when considering self-report measures, the reduction in falls associated with SES becomes negligible. The evidence for any positive effect of SES on driving is also mixed, whereby SES was associated with improvements in simulated driving performance but was not associated with changes in driving behaviours measured through in vehicle monitoring. Self-report measures of driving performance also returned inconsistent results. Whilst SES appears to be associated with a general trend towards improved motor function, more evidence is needed to reach any firm conclusions and to best advise policy regarding access to SES in an ageing population. Systematic Review Registration: https://osf.io/7hne6/, identifier INPLASY2020100042.
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15
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Corneal Endothelial Cell Loss After Endocapsular and Supracapsular Phacoemulsification: The PERCEPOLIS Randomized Clinical Trial. Cornea 2022; 41:714-721. [PMID: 34732666 DOI: 10.1097/ico.0000000000002822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/31/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Subluxation techniques are superior to divide-and-conquer in procedure duration, pain, and ultrasound quantity, but their safety in endothelial cell loss (ECL) is unclear. This randomized single-blind noninferiority clinical trial aimed to determine whether subluxation supracapsular phacoemulsification techniques are inferior to a reference endocapsular technique (divide-and-conquer) regarding postoperative corneal ECL. METHODS Patients (aged18 years or older) with greater than +0.2 logarithm of the minimum angle of resolution best spectacle-corrected visual acuity and normal to severe density cataract were randomized to subluxation or divide-and-conquer phacoemulsification in 2015 to 2016. Follow-up with ophthalmic tests was conducted on day 4 and months 1, 3, and 12. The primary study outcome was ECL at all time points. Secondary study end points were operative variables, including effective phaco time and procedure duration. A clinically relevant noninferiority ECL limit was established on the basis of the literature. RESULTS In total, 292 patients (mean age, 73 yrs; 59% female) were randomized and underwent subluxation (n = 148) or divide-and-conquer (n = 144). Day 4 and month 1, 3, and 12 data were available for 243, 270, 275, and 198 patients, respectively. The unexpectedly high dropout at 12 months meant that the 12-month ECL data could only be assessed qualitatively. Surgery was successful in all patients. Subluxation was noninferior to divide-and-conquer in ECL. Effective phaco times were similar, but subluxation associated with shorter procedure duration. CONCLUSIONS The subluxation technique was noninferior to divide-and-conquer regarding postoperative ECL, at least in the first 3 months, and associated with reduced intervention time. Subluxation techniques may be suitable alternatives to endocapsular techniques.Clinical Trial Registration-URL: ClinicalTrials.gov. Unique identifier: NCT02535819.
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16
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Uyar E. Eye-Related Factors That Can Be Associated With the Plane of Phacoemulsification. Cureus 2022; 14:e24578. [PMID: 35651429 PMCID: PMC9138195 DOI: 10.7759/cureus.24578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2022] [Indexed: 11/25/2022] Open
Abstract
Purpose: To evaluate the effect of eye-related factors such as biometric and surgical parameters, nuclear sclerosis (NS) grade, and pupil and capsulorhexis diameters on the plane of phacoemulsification (PP). Material and Methods: This prospective study included 328 eyes of 328 patients who underwent phacoemulsification surgery. The phaco-chop technique was performed in all patients and changes in PP that occurred during surgery were recorded. Patients were grouped as follows: Group 1, > 75% of lens nucleus emulsified in the capsular bag; Group 2, > 75% of lens nucleus emulsified at the pupillary plane; and Group 3, > 50% of lens nucleus emulsified in the anterior chamber. The association between PP and eye-related factors was evaluated. Results: There were 153 patients (46.7 %) in Group 1, 104 patients (31.7 %) in Group 2 and 71 patients (21.6 %) in Group 3. The factors associated with PP were anterior chamber depth (ACD) (p = 0.020) and NS grade (p = 0.028). No significant relationship was detected between PP and age, surgical parameters or other biometric values. Moreover, PP was found to be more anterior in patients with soft cataracts and deeper ACD values (p values were 0.002 and 0.036, respectively). Conclusion: The present study has reported that PP may move to more anterior, as softer cataracts may increase the fear of posterior capsule rent. Moreover, PP may move to more posterior due to shallow anterior chambers or high-grade cataracts that could potentially increase the fear of endothelial injury.
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17
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Boroojeny AB, Nunney I, Dhatariya KK. The Association Between Glycaemic Control, Renal Function and Post-operative Ophthalmic Complications in People With Diabetes Undergoing Cataract Surgery-A Single-Centre Retrospective Analysis. Diabetes Ther 2022; 13:723-732. [PMID: 35278194 PMCID: PMC8991233 DOI: 10.1007/s13300-022-01241-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 02/23/2022] [Indexed: 11/14/2022] Open
Abstract
INTRODUCTION In general surgery, it has been shown that poor peri-operative diabetes control, as measured by glycated haemoglobin (HbA1c), is associated with adverse post-operative outcomes. National data for the UK suggest that the post-operative complication rate for cataract surgery is 2.8%. It is unknown whether people with diabetes who undergo cataract surgery are also at increased risk. METHODS This single-centre retrospective study looked at the association of peri-operative HbA1c and estimated glomerular filtration rate (eGFR) with the risk of post-operative complications in people undergoing phacoemulsification and intraocular lens implantation under local anaesthesia during 2016. RESULTS 4401 individuals had cataract surgery. Of these, 34.6% (1525) had diabetes. Of those with diabetes, 114 (7.5%) developed a post-operative ophthalmological complication (as defined by the Royal College of Ophthalmologists) necessitating at least one eye clinic appointment. Mean HbA1c did not differ between those who did and those who did not develop complications (52 vs 50 mmol/mol, p = 0.12). After adjustment, HbA1c was not a significant risk (OR 1.00; 95% CI: 0.99-1.05; p = 0.85). However, eGFR had a small but statistically significant effect on outcome (OR 0.99; 95% CI: 0.98-1.00; p = 0.02). CONCLUSIONS This study has shown that more people who undergo cataract surgery have diabetes than previously reported. Also, people with diabetes are at higher risk of developing complications than previously reported. HbA1c concentration was not a factor in these adverse post-operative outcomes. However, eGFR was a predictor of risk. More focus should be placed on pre-operatively optimising co-morbidities than diabetes control in those undergoing cataract surgery.
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Affiliation(s)
| | - Ian Nunney
- Norwich Medical School, University of East Anglia, Norwich, Norfolk, UK
| | - Ketan K Dhatariya
- Norwich Medical School, University of East Anglia, Norwich, Norfolk, UK.
- Department of Medicine, Norfolk and Norwich University Hospitals NHS Foundation Trust, Colney Lane, Norwich, Norfolk, NR4 7UY, UK.
- Elsie Bertram Diabetes Centre, Norfolk and Norwich University Hospitals NHS Foundation Trust, Colney Lane, Norwich, Norfolk, NR4 7UY, UK.
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18
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Cho J, Kim J, Hwang YH, Kim KN. Clinical Outcomes of Applying Therapeutic Contact Lenses and Eye Drops after Cataract Surgery. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2022. [DOI: 10.3341/jkos.2022.63.3.268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Purpose: To investigate the safety of applying therapeutic contact lenses and eye drops after cataract surgery.Methods: Immediately after cataract surgery, 947 eyes (group 1) used therapeutic contact lenses and eye drops and 914 (group 2) applied antibiotic ointment and wore a gauze eye patch for the first postoperative day. Clinical outcomes including best corrected visual acuity (BCVA), IOP, degree of anterior chamber inflammation, wound leakage, and postoperative endophthalmitis were compared in the two groups 1 day, 1 week, and 1 month after surgery.Results: There were no significant differences in the mean pre- and postoperative BCVA and IOP at 1 day, 1 week, and 1 month between groups 1 and 2. There was no difference in anterior chamber inflammation between the two groups at 1 day (p = 0.302), 1 week (p = 0.437), or 1 month (p = 0.960) after surgery. On the first postoperative day, 10 eyes in group 1 and nine eyes in group 2 had wound leakage (p = 1.000). There was no endophthalmitis in either group.Conclusions: The risk of postoperative complications in group 1 was not higher than in group 2. Therefore, wearing therapeutic contact lenses and using eye drops is a relatively safe management method after cataract surgery.
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Fernandes AG, Ferraz AN, Lemos RDS, Watanabe SES, Berezovsky A, Salomão SR. Trends in cataract surgical treatment within the Brazilian national public health system over a 20-year period: Implications for Universal Eye Health as a global public health goal. PLOS GLOBAL PUBLIC HEALTH 2022; 2:e0000328. [PMID: 36962381 PMCID: PMC10021674 DOI: 10.1371/journal.pgph.0000328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 05/17/2022] [Indexed: 11/19/2022]
Abstract
Cataract is a highly prevalent, treatable, and sight threatening condition considered one of the main focuses of public health policies addressing visual impairment and blindness towards Universal Eye Health. We aimed to investigate the trends on number of cataract surgical procedures performed through the Brazilian national health system (SUS) from 2000 to 2019 while also evaluating costs associated with it. The Brazilian Public Health System Information Database (DATASUS) was used as the primary data source for procedures including extracapsular cataract extraction (ECCE) and phacoemulsification. Trends along the years were evaluated through generalized linear models. A total of 8,424,521 cataract procedures were performed from 2000 to 2019, with a significant increase along the years from 228,145 in 2000 to 663,186 in 2019 (p<0.001), a cataract surgical procedure rate change from 13.15 to 32.28 procedures per 10,000 people. It was observed a significant increase on the number of phacoemulsification (p<0.001) and a significant decrease on the number of ECCE (p<0.001). A shift on the predominant technique has occurred between 2007 and 2008 with phacoemulsification increasing its percentual representativity from 34.3% to 69.7% of all procedures, reaching 96.1% in 2019. Phacoemulsification costs per procedure increased 30.5% from from USD$119.00 to USD$155.33 (p = 0.007) and the ECCE costs per procedure increased 29.1% from USD$78.57 to USD$101.43 (p = 0.001). There is an increasing trend of procedures related to cataract treatment performed through SUS along the 20-years period and a switch on the technique predominance from ECCE to phacoemulsification was observed after 2007. The costs associated with both techniques have increased but have not followed the country's overall inflation. Data derived from DATASUS is important to understand the overall panorama of ocular health offered by the national health system and to provide information to guide healthcare leaders on management and planning of public health policies within the system.
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Affiliation(s)
- Arthur Gustavo Fernandes
- Department of Ophthalmology and Visual Sciences, Paulista Medical School, Federal University of São Paulo - UNIFESP, São Paulo, São Paulo, Brazil
- Department of Anthropology and Archaeology, University of Calgary, Calgary, Alberta, Canada
| | - Aline Nunes Ferraz
- Department of Ophthalmology and Visual Sciences, Paulista Medical School, Federal University of São Paulo - UNIFESP, São Paulo, São Paulo, Brazil
| | - Rafael da Silva Lemos
- Department of Ophthalmology and Visual Sciences, Paulista Medical School, Federal University of São Paulo - UNIFESP, São Paulo, São Paulo, Brazil
| | - Sung Eun Song Watanabe
- Department of Ophthalmology and Visual Sciences, Paulista Medical School, Federal University of São Paulo - UNIFESP, São Paulo, São Paulo, Brazil
| | - Adriana Berezovsky
- Department of Ophthalmology and Visual Sciences, Paulista Medical School, Federal University of São Paulo - UNIFESP, São Paulo, São Paulo, Brazil
| | - Solange Rios Salomão
- Department of Ophthalmology and Visual Sciences, Paulista Medical School, Federal University of São Paulo - UNIFESP, São Paulo, São Paulo, Brazil
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20
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Choudhary A, Gore V, Agrawal M, Shah A, Alex J. A comparative study of central corneal thickness changes in bevel-up and bevel-down phacoemulsification. TNOA JOURNAL OF OPHTHALMIC SCIENCE AND RESEARCH 2022. [DOI: 10.4103/tjosr.tjosr_146_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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21
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Gurnani B, Kaur K. Unique experience from two-week Alcon phacoemulsification training program at a tertiary eye care centre. Indian J Ophthalmol 2021; 70:352-353. [PMID: 34937296 PMCID: PMC8917611 DOI: 10.4103/ijo.ijo_1981_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Bharat Gurnani
- Consultant Cataract, Cornea and Refractive Services, Aravind Eye Hospital and Post Graduate Institute of Ophthalmology, Pondicherry, India
| | - Kirandeep Kaur
- Consultant Cataract Pediatric Ophthalmology and Strabismus Services, Aravind Eye Hospital and Post Graduate Institute of Ophthalmology, Pondicherry, India
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22
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Tsou BC, Vongsachang H, Purt B, Srikumaran D, Justin GA, Woreta FA. Cataract Surgery Numbers in U.S. Ophthalmology Residency Programs: An ACGME Case Log Analysis. Ophthalmic Epidemiol 2021; 29:688-695. [PMID: 34913813 DOI: 10.1080/09286586.2021.2015395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE To describe and assess the cataract experience of ophthalmology residents throughout the United States (U.S.). METHODS Cataract procedures logged by graduating ophthalmology residents nationwide and published by the Accreditation Council for Graduate Medical Education (ACGME) from 2009 to 2020 were analyzed using linear regression on log-transformed response variables with robust variance. RESULTS As primary surgeon, average numbers logged for phacoemulsification increased yearly by an average of 4.1% prior to 2019 and then decreased by 22.1% in 2019 for an overall average yearly increase of 2.9% (95% CI: 0.5, 5.4%, p = .03), non-phacoemulsification extracapsular extraction decreased yearly by an average of 4.6% (95% CI: -7.7, -1.5%, p = .01), other cataract/intraocular lens surgeries decreased yearly by an average of 8.4% (95% CI: -10.1, -6.6%, p < .001), anterior vitrectomies decreased yearly by an average of 12.5% (95% CI: -14.9, -10.1%, p < .001), and laser capsulotomies increased yearly by an average of 6.0% prior to 2019 and then decreased by 3.0% for an overall average yearly increase of 5.3% (95% CI: 4.5, 6.2%, p < .001). As assistant, average numbers logged in all ACGME minimum categories showed decreasing trends. CONCLUSIONS Over the last decade, the average numbers of phacoemulsification and laser capsulotomies logged by residents as primary surgeon increased while other ACGME cataract minimum procedures decreased. Surgical volume in 2019-20 was lower due to the coronavirus disease-19 pandemic but higher than from 2009 to 2013.
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Affiliation(s)
- Brittany C Tsou
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Hursuong Vongsachang
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Boonkit Purt
- Department of Ophthalmology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA.,Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Divya Srikumaran
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Grant A Justin
- Department of Ophthalmology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA.,Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Fasika A Woreta
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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23
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Benítez Martínez M, Baeza Moyano D, González-Lezcano RA. Phacoemulsification: Proposals for Improvement in Its Application. Healthcare (Basel) 2021; 9:1603. [PMID: 34828648 PMCID: PMC8621996 DOI: 10.3390/healthcare9111603] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 02/05/2023] Open
Abstract
A cataract is defined as opacity of the crystalline lens. It is currently one of the most prevalent ocular pathologies and is generally associated with aging. The most common treatment for cataracts is surgery. Cataract surgery is a quick and painless process, is very effective, and has few risks. The operation consists of removing the opacified lens and replacing it with an intraocular lens. The most common intraocular lens removal procedure that is currently used is phacoemulsification. The energy applied in this process is generated by ultrasonic waves, which are mechanical waves with a frequency higher than 20 kHz. A great deal of research on the different ways to perform the stages of this surgical procedure and the analysis of the possible side effects of the operation has been published, but there is little information on the technical characteristics, the intensities applied, and the use of ultrasound-emitting (U/S) equipment for cataract removal. More studies on the method and depth of absorption of ultrasonic waves in our visual system when performing the phacoemulsification procedure are needed. It would be advisable for health authorities and medical professionals to develop guidelines for the handling and use of ultrasonic wave-emitting equipment, such as those that exist for ultrasound and physiotherapy. This could help us to reduce undesirable effects after the operation.
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Affiliation(s)
- Marta Benítez Martínez
- Department of Chemistry and Biochemistry, Campus Montepríncipe, Universidad San Pablo CEU, 28668 Alcorcón, Madrid, Spain; (M.B.M.); (D.B.M.)
| | - David Baeza Moyano
- Department of Chemistry and Biochemistry, Campus Montepríncipe, Universidad San Pablo CEU, 28668 Alcorcón, Madrid, Spain; (M.B.M.); (D.B.M.)
| | - Roberto Alonso González-Lezcano
- Arquitecture and Design Department, Escuela Politécnica Superior, Campus Montpríncipe, Universidad San Pablo CEU, 28668 Alcorcón, Madrid, Spain
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24
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Fichtner JE, Patnaik J, Christopher KL, Petrash JM. Cataract inhibitors: Present needs and future challenges. Chem Biol Interact 2021; 349:109679. [PMID: 34600869 DOI: 10.1016/j.cbi.2021.109679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/25/2021] [Accepted: 09/29/2021] [Indexed: 12/21/2022]
Abstract
Cataracts result from opacification of the ocular lens and represent the leading cause of blindness worldwide. After surgical removal of the diseased lens material and implantation of an artificial intraocular lens, up to 50% of cataract patients develop a secondary lens defect called posterior capsular opacification (PCO). While vision can be restored in PCO patients by a laser-mediated capsulotomy, novel therapies involving inhibition of aldose reductase are now being developed to prevent PCO development and complications of laser capsulotomy. A question we wished to address was whether cataract surgeons believe there is an unmet need for a preventative PCO therapy, whether they would prescribe such a therapy were it available, and to assess their perceptions regarding the benefits of and obstacles to adopting novel PCO therapies in the place of laser capsulotomy. We gathered perspectives from adult, pediatric, and veterinary cataract surgeons using an online questionnaire. From 161 surgeon responses, we found that the majority of adult, pediatric, and veterinary cataract surgeons (78% n = 35, 88% n = 37, and 96% n = 71 respectively) believed there is an unmet need for preventative PCO therapy, with more than 95% expressing interest in incorporating such therapy into surgical protocols. Perceived benefits included optimizing visual outcomes, avoiding the need for additional procedures, eliminating complications related to neodymium:yttrium-aluminum-garnet laser, preserving the posterior capsule particularly in patients receiving multifocal intraocular lens implants, providing a viable solution for PCO in animals, and using it in developing countries that lack access to neodymium:yttrium-aluminum-garnet lasers. Perceived obstacles included potential lack of reimbursement by insurance companies, and the need for strong efficacy and safety profiles. Among adult surgeons, 70% (n = 31) indicated that preventative PCO therapy could add value to premium intraocular lens packages. Our studies revealed that cataract surgeons overwhelmingly support the development of preventative PCO therapy, and that clinical trials will play a critical role to test the safety and efficacy of specific therapeutic agents.
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Affiliation(s)
- Justin E Fichtner
- University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Jennifer Patnaik
- University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | | | - J Mark Petrash
- University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
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25
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Fill levels, cost comparisons and expulsion force requirements of commonly used topical ophthalmic steroids. J Cataract Refract Surg 2021; 48:475-480. [PMID: 34653089 DOI: 10.1097/j.jcrs.0000000000000833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 09/23/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE To determine volume fill levels, estimated costs, and force expulsion requirements per bottle of topical ophthalmic steroids commonly used in the United States. SETTING Tertiary care academic referral center. DESIGN Prospective laboratory investigation. METHODS Eight commercially available medications were tested: loteprednol 0.5%, loteprednol gel 0.5%, loteprednol gel 0.38%, difluprednate 0.05%, generic fluorometholone 0.1%, branded fluorometholone 0.1%, generic prednisolone 1.0%, and branded prednisolone 1.0%. Ten bottles of each medication were tested. A double-blinded method was used to measure actual bottle-fill volume and number of drops dispensed per bottle. The total perioperative cost per drop was calculated for each medication using average cash price. Force requirements were measured using a customized force gauge apparatus. Formulations were compared using Kruskal-Wallis one-way ANOVAs. RESULTS All formulations were able to cover postoperative periods commensurate with commonly used dosing regimens for cataract surgery. All medications had greater than sticker volume. Loteprednol 0.5% suspension and branded fluorometholone had the highest and lowest number of drops among the medications tested, respectively. Loteprednol 0.38% gel was the most expensive medication, while generic prednisolone 1.0% was the least expensive. Gel and branded formulations of ophthalmic steroids required less expulsion force compared to other tested formulations. CONCLUSIONS Volume fill levels, patient-incurred costs and expulsion force requirements per bottle of topical steroid medications vary widely. Clinicians may wish to consider these findings when determining their perioperative prescribing regimens.
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Matarazzo F, Phylactou M, Aiello F, Gallo Afflitto G, Yue Sim S, Maurino V. Incidence and complications of retained lens fragment in the anterior chamber after uneventful cataract surgery in a United Kingdom tertiary center. J Cataract Refract Surg 2021; 47:1064-1070. [PMID: 34292892 DOI: 10.1097/j.jcrs.0000000000000585] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 01/12/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE To analyze the outcomes of retained lens fragment (RLF) in the anterior chamber after uneventful cataract surgery. SETTING Moorfields Eye Hospital, NHS Foundation Trust, London, United Kingdom. DESIGN Retrospective, observational cross-sectional study. METHODS A single-center, retrospective review was performed to identify patients who underwent RLF removal after uneventful phacoemulsification surgery between October 2012 and November 2018; 122 eyes from 121 patients were identified. Patient characteristics, clinical findings, visual outcomes, and need for subsequent surgical procedure were recorded. Main outcomes were change in corrected distance visual acuity (CDVA), and number and risk factors associated with additional surgery following RLF removal. RESULTS One hundred twenty-two RLF over a total of 98 467 uneventful phacoemulsification surgeries were identified, with an incidence of 1 (0.124%) in 807 operations. The mean CDVA improved significantly after RLF removal from 0.32 to 0.26 logMAR (SD 0.26) (P = .001). Six eyes (4.9%) had persistent corneal edema that required endothelial keratoplasty (EK) after a mean of 13 months after RLF removal (SD 12 months; median 8; range 4 to 35). Risk factors for EK include α-receptor blocker use (odds ratio [OR], 6.75; 95% CI, 1.069, 42.63), increased interval (month) between cataract surgery and diagnosis of RLF (OR, 1.29; CI: 1.080, 1.541), increased interval between cataract surgery and RLF washout (OR, 1.28; CI, 1.075, 1.522), and RLF diagnosis on gonioscopy (OR, 10.60; CI, 1.885, 59.59). CONCLUSIONS RLF is a rare complication of uneventful cataract surgery and appears more frequently in challenging cataract cases and myopic eyes. CDVA improved significantly after RLF removal, but approximately 1 in 20 eyes needed additional surgery-mainly EK for corneal decompensation.
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Affiliation(s)
- Francesco Matarazzo
- From the Moorfields Eye Hospital, NHS Foundation Trust, London, United Kingdom (Matarazzo, Phylactou, Sim, Mauriono); and Ophthalmology Unit, Department of Experimental Medicine, University of Rome "Tor Vergata", Rome, Italy (Aiello, Afflitto)
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Iftikhar M, Abariga SA, Hawkins BS, Zafar S, Mir TA, Jampel H, Woreta FA. Pharmacologic interventions for mydriasis in cataract surgery. Cochrane Database Syst Rev 2021; 5:CD012830. [PMID: 34043237 PMCID: PMC8158329 DOI: 10.1002/14651858.cd012830.pub2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Cataract surgery is one of the most common surgical procedures performed worldwide. Achieving appropriate intraoperative mydriasis is one of the critical factors associated with the safety and performance of the surgery. Inadequate pupillary dilation or constriction of the pupil during cataract surgery can impair the surgeon's field of view and make it difficult to maneuver instruments. OBJECTIVES To evaluate the relative effectiveness of achieving pupillary dilation during phacoemulsification for cataract extraction using three methods of pupillary dilation: topical mydriatics, intracameral mydriatics, or depot delivery systems. We also planned to document and compare the risk of intraoperative and postoperative complications following phacoemulsification for cataract extraction, as well as the cost-effectiveness of these methods for pupillary dilation. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL), which contains the Cochrane Eyes and Vision Trials Register) (2021, Issue 1); Ovid MEDLINE; Embase.com; PubMed; Latin American and Caribbean Health Sciences Literature Database (LILACS); ClinicalTrials.gov; and the World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP). We did not use any date or language restrictions in the electronic search for trials. We last searched the electronic databases on 22 January 2021. SELECTION CRITERIA We included only randomized controlled trial (RCTs) in which participants underwent phacoemulsification for cataract extraction. DATA COLLECTION AND ANALYSIS We followed standard Cochrane methodology. MAIN RESULTS We included a total of 14 RCTs (1670 eyes of 1652 participants) in this review. Of the 14 trials, 7 compared topical versus intracameral mydriatics, 6 compared topical mydriatics versus depot delivery systems, and 1 compared all three methods. We were unable to calculate overall estimates of comparative effectiveness for most outcomes due to statistical heterogeneity among the estimates from individual studies or because outcome data were available from only a single study. Furthermore, the certainty of evidence for most outcomes was low or very low, due primarily to imprecision and risk of bias. Comparison 1: topical mydriatics versus intracameral mydriatics Four RCTs (739 participants, 757 eyes) of the 8 RCTs that had compared these two methods reported mean pupillary diameters at the time surgeons had performed capsulorhexis; all favored topical mydriatics, but heterogeneity was high (I2 = 95%). After omitting 1 RCT that used a paired-eyes design, evidence from three RCTs (721 participants and eyes) suggests that mean pupil diameter at the time of capsulorhexis may be greater with topical mydriatics than with intracameral mydriatics, but the evidence is of low certainty (mean difference 1.06 mm, 95% confidence interval (CI) 0.81 mm to 1.31 mm; I2 = 49%). Four RCTs (224 participants, 242 eyes) reported mean pupillary diameter at the beginning of cataract surgery; the effect estimates from all trials favored topical mydriatics, with very low-certainty evidence. Five RCTs (799 participants, 817 eyes) reported mean pupillary diameter at the end of cataract surgery. Data for this outcome from the largest RCT (549 participants and eyes) provided evidence of a small difference in favor of intracameral mydriasis. On the other hand, 2 small RCTs (78 participants, 96 eyes) favored topical mydriatics, and the remaining 2 RCTs (172 participants) found no meaningful difference between the two methods, with very low-certainty evidence. Five RCTs (799 participants, 817 eyes) reported total intraoperative surgical time. The largest RCT (549 participants and eyes) reported decreased total intraoperative time with intracameral mydriatics, whereas 1 RCT (18 participants, 36 eyes) favored topical mydriatics, and the remaining 3 RCTs (232 participants) found no difference between the two methods, with very low-certainty evidence. Comparison 2: topical mydriatics versus depot delivery systems Of the 7 RCTs that compared these two methods, none reported mean pupillary diameter at the time surgeons performed capsulorhexis. Six RCTs (434 participants) reported mean pupillary diameter at the beginning of cataract surgery. After omitting 1 RCT suspected to be responsible for high heterogeneity (I2 = 80%), meta-analysis of the other 5 RCTs (324 participants and eyes) found no evidence of a meaningful difference between the two methods, with very low-certainty evidence. Three RCTs (210 participants) reported mean pupillary diameter at the end of cataract surgery, with high heterogeneity among effect estimates for this outcome. Estimates of mean differences and confidence intervals from these three RCTs were consistent with no difference between the two methods. A fourth RCT reported only means for this outcome, with low-certainty evidence. Two small RCTs (118 participants) reported total intraoperative time. Surgical times were lower when depot delivery was used, but the confidence interval estimated from one trial was consistent with no difference, and only mean times were reported from the other trial, with very low-certainty evidence. Comparison 3: Intracameral mydriatics versus depot delivery systems Only one RCT (60 participants) compared intracameral mydriatics versus depot delivery system. Mean pupillary diameter at the time the surgeon performed capsulorhexis, phacoemulsification time, and cost outcomes were not reported. Mean pupil diameter at the beginning and end of cataract surgery favored the depot delivery system, with very low-certainty evidence. Adverse events Evidence from one RCT (555 participants and eyes) comparing topical mydriatics versus intracameral mydriatics suggests that ocular discomfort may be greater with topical mydriatics than with intracameral mydriatics at one week (risk ratio (RR) 10.57, 95% CI 1.37 to 81.34) and one month (RR 2.51, 95% CI 1.36 to 4.65) after cataract surgery, with moderate-certainty evidence at both time points. Another RCT (30 participants) reported iris-related complications in 11 participants in the intracameral mydriatics group versus no complications in the depot delivery system group, with very low-certainty evidence. Cardiovascular related adverse events were rarely mentioned. AUTHORS' CONCLUSIONS Data from 14 completed RCTs were inadequate to establish the superiority of any of three methods to achieve mydriasis for cataract surgery, based on pupillary dilation at different times during the surgery or on time required for surgery. Only one trial had a sample size adequate to yield a robust effect estimate. Larger, well-designed trials are needed to provide robust estimates for the comparison of mydriasis approaches for beneficial and adverse effects.
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Affiliation(s)
- Mustafa Iftikhar
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Samuel A Abariga
- Department of Ophthalmology, University of Colorado Anschutz Medical Campus, Denver, Colorado, USA
| | - Barbara S Hawkins
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sidra Zafar
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Tahreem A Mir
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Henry Jampel
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Fasika A Woreta
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Goles N, Nerancic M, Konjik S, Pajic-Eggspuehler B, Pajic B, Cvejic Z. Phacoemulsification and IOL-Implantation without Using Viscoelastics: Combined Modeling of Thermo Fluid Dynamics, Clinical Outcomes, and Endothelial Cell Density. SENSORS 2021; 21:s21072399. [PMID: 33808502 PMCID: PMC8037460 DOI: 10.3390/s21072399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/13/2021] [Accepted: 03/19/2021] [Indexed: 11/16/2022]
Abstract
Phacoemulsification is a widely used surgical method in cataract surgery with a high energy ultrasound source. The viscoelastic is considered to be tissue protective. The aim of this study is to investigate during surgery the impact of using viscoelastic versus no viscoelastic on clinical outcomes, potential complications and effect on endothelial cell density. The study group included 64 patients, who were subjected to phacoemulsification using balanced salt solution (BSS). Control group consisted of 62 patients, who underwent phacoemulsification using Hyaloronic acid 1% Healon 1%. Student’s t-test was applied for statistical analysis. The simulations of temperature changes during phacoemulsification were performed by COMSOL Multiphysics software. In the BSS group, a mean endothelial cell loss (ECL) of 4.5% was measured one month postoperatively, while in the Healon group ECL was 5.3%. Data analysis showed no significant difference in ECL between the groups (Student’s t-test, p = 0.8). No significant difference was observed in endothelial cell morphology and IOP between the two groups pre- and postoperatively (all p > 0.05). The modeling of thermo fluid dynamics showed that the heating of the cornea is slightly less when Healon was used as irrigation fluid. The phacoemulsification technique can be performed by an experienced surgeon with viscoelastics or continuous anterior chamber (AC) irrigation on the same level of safety regarding endothelial cell damage, providing equally satisfying clinical outcomes.
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Affiliation(s)
- Nikola Goles
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia; (N.G.); (M.N.); (B.P.)
| | - Marko Nerancic
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia; (N.G.); (M.N.); (B.P.)
| | - Sanja Konjik
- Department of Mathematics and Informatics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia;
| | | | - Bojan Pajic
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia; (N.G.); (M.N.); (B.P.)
- Eye Clinic Orasis, Swiss Eye Research Foundation, 5734 Reinach AG, Switzerland;
- Division of Ophthalmology, Department of Clinical Neurosciences, Geneva University Hospitals, 1205 Geneva, Switzerland
- Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland
- Faculty of Medicine of the Military Medical Academy, University of Defense, 11000 Belgrade, Serbia
| | - Zeljka Cvejic
- Department of Physics, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia; (N.G.); (M.N.); (B.P.)
- Correspondence:
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Shrivastava AK, Nayak S, Anto M. Efficacy of Nepafenac versus Flurbiprofen in Maintaining Intraoperative Mydriasis During Phacoemulsification: A Comparative Study. Clin Ophthalmol 2021; 15:1085-1093. [PMID: 33727791 PMCID: PMC7955764 DOI: 10.2147/opth.s303480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 02/24/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose To compare the efficacy of topical nepafenac (0.1%) with flurbiprofen (0.03%) in maintaining intra-operative mydriasis during phacoemulsification surgery. Patients and Methods This study comprised of 160 patients, who were divided into two arms of 80 each (arms A and B) after randomisation. Pre-operatively, all patients received one drop of tropicamide 0.8% and phenylephrine 5% (combination), 4 times, at an interval of 15 minutes on the day of surgery. Thereafter, Nepafenac drop in arm A/Flurbiprofen drop in arm B was administered 4 times, at an interval of 15 minutes keeping a gap of 10 minutes between tropicamide-phenylephrine and any of the experimental drugs. Phacoemulsification was performed one hour after the administration of last drop. Both vertical and horizontal pupillary diameter were measured at three steps; immediately before the surgical incision (baseline), at the end of emulsification of nucleus (before irrigation and aspiration) and at the end of surgery (after stromal hydration). Results The difference in pupillary diameter between two groups, was statistically insignificant for vertical diameter (P = 0.08) and horizontal diameter (P = 0.28) at the start of surgery. On the other hand, pupillary diameter difference was statistically significant after emulsification of nucleus and at the end of surgery as well when both vertical (P < 0.05) and horizontal diameter (P < 0.05) were considered. The total reduction in pupillary diameter (both vertically and horizontally) was significantly less in the Nepafenac as compared to Flurbiprofen group (P < 0.05). Analysis of mean cumulative dissipated energy did not document any appreciable difference between the two groups. Phacoemulsification time analysis yielded statistically significant results (P = 0.004) between the Nepafenac and Flurbiprofen group. Conclusion In the present study, topical Nepafenac (0.1%) proved to be more efficacious in maintaining intra-operative mydriasis during phacoemulsification surgery as compared to topical Flurbiprofen (0.03%).
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Affiliation(s)
- Ankur K Shrivastava
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
| | - Swatishree Nayak
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
| | - Mary Anto
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
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Gigliola S, Sborgia G, Niro A, Palmisano C, Puzo P, Giuliani G, Sborgia L, Pastore V, Sborgia A, Alessio G. One-Handed Rotational Phacoemulsification Technique. Clin Ophthalmol 2021; 15:431-435. [PMID: 33574651 PMCID: PMC7873615 DOI: 10.2147/opth.s281857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 11/23/2020] [Indexed: 11/23/2022] Open
Abstract
Introduction We described a one-handed rotational phacoemulsification technique to decrease phaco time and power, and surgical stress on the cornea in eyes with different types of cataract. Methods In this technique a single sutureless corneal incision was made without any side-port incision. After hydrodissection and hydrodelamination were performed, a phaco tip was positioned in contact with the nucleus beside the capsulorhexis edge. By using a peristaltic pump, phacoemulsification was started with high levels of vacuum to keep the probe tip on the edge of the lens and to ensure the rotation of the nucleus, and with low ultrasound energy. The torsional mode used required less occlusion time and volume of fluid. The inclination of the tip was modified to 45-degree, directing it toward the lens center. So the nucleus was aspirated from the periphery toward the center by a rotational movement. Results The eye in the technical video had a NC4-NO4 cataract. The preoperative vision in this eye was 20/100 with no improvement with refraction. On postoperative day 1, visual acuity had improved to 20/20. We recorded low intraoperative parameters including ultrasound time (21.4 sec), phacoemulsification power (73%), balanced salt solution used (31 mL) and cumulative dissipated energy (7.27) at the conclusion of the case. After 1 month, Central Corneal Thickness changed from 504 µm to 516 µm, and Endothelial Cell Loss was 1.15%. Conclusion This technique uses a single clear corneal incision, high vacuum and low ultrasound power to reduce the exposition to excessive surgical maneuvers, fluid turbulence and ultrasound energy.
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Affiliation(s)
- Samuele Gigliola
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Giancarlo Sborgia
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Alfredo Niro
- Eye Clinic, Hospital "S. G. MOSCATI", ASL TA, Taranto, Italy
| | - Carmela Palmisano
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Pasquale Puzo
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Gianluigi Giuliani
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Luigi Sborgia
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Valentina Pastore
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | | | - Giovanni Alessio
- Eye Clinic, Depatment of Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
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Agrawal M, Gore V, Choudhary A, Alex J, Shah A. A study on measurement of central corneal thickness changes in postoperative period of phacoemulsification cataract surgery. TNOA JOURNAL OF OPHTHALMIC SCIENCE AND RESEARCH 2021. [DOI: 10.4103/tjosr.tjosr_107_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Ting DSJ, Chua D, May KO, Aung M, Kumar A, Farook M, Htoon HM, C A Sng C, Ang M. Modified manual small incision cataract surgery technique for phacoemulsification-trained surgeons. Ther Adv Ophthalmol 2020; 12:2515841420977372. [PMID: 33344883 PMCID: PMC7727050 DOI: 10.1177/2515841420977372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/23/2020] [Indexed: 01/09/2023] Open
Abstract
Purpose: To present the technique and outcomes of a modified manual small incision cataract surgery designed for the phacoemulsification surgeons who are learning to perform manual small incision cataract surgery. Methods: This was a retrospective, single-centred, comparative study. We included all the patients who underwent the modified manual small incision cataract surgery for visually significant cataract at Singapore National Eye Centre. All surgeries were performed by either a senior phaco-trained surgeon (M.A.) who had performed more than 500 manual small incision cataract surgery or a junior phaco-trained surgeon (D.C.) who had performed around 500 phacoemulsification but never performed any manual small incision cataract surgery. The main modification of this technique lies in the creation of an additional phaco-like main wound at 90° to the scleral tunnel wound, with most surgical steps performed through this additional wound. The outcomes were analysed and compared between the senior and junior surgeons. The main outcome measures were visual outcome and major intraoperative complications such as posterior capsular rupture and zonular dialysis. Results: A total of 132 cases were included; 102 (77.3%) and 30 (22.7%) cases were performed by the senior and junior surgeons, respectively. Pre-operatively, 85.6% eyes had best-corrected visual acuity of counting fingers or worse. Postoperatively, the visual outcome at 1 month was similar between the senior and junior surgeons, with 68.7% eyes achieving a best-corrected visual acuity of ⩾6/12 (p = 0.17). No posterior capsular rupture, zonular dialysis or endophthalmitis was observed during the study period. Conclusions: This modified technique may serve as a useful transition technique for the phaco-trained surgeons to develop skills in manual small incision cataract surgery, with demonstrable good visual outcome and safety.
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Affiliation(s)
- Darren S J Ting
- Academic Ophthalmology, School of Medicine, University of Nottingham, Nottingham, UK
| | | | - Khin Oo May
- Sitagu International Missionary Association, Yangon, UK
| | - Mya Aung
- Sitagu International Missionary Association, Yangon, UK
| | | | | | - Hla M Htoon
- Singapore Eye Research Institute, Singapore; Ophthalmology and Visual Sciences, Duke - NUS Graduate Medical School, Singapore
| | - Chelvin C A Sng
- Singapore Eye Research Institute, Singapore; Department of Ophthalmology, National University Hospital, Singapore
| | - Marcus Ang
- Singapore National Eye Centre, 11 Third Hospital Avenue, Singapore 168751
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Comparison of semicircular and bent tips regarding regional differences in oscillation amplitude under various torsional power settings. J Cataract Refract Surg 2020; 46:1381-1386. [PMID: 33060473 DOI: 10.1097/j.jcrs.0000000000000258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To analyze the difference between the behavior of semicircular (balanced) and bent (mini) tips at 20 incremental torsional power settings. SETTING Tsukazaki Hospital, Himeji, Japan. DESIGN Experimental study. METHODS Using an ultra-high-speed video camera HPV-X2, the 2 tips during torsional oscillation were recorded, comparing tip behavior at power settings from 5% to 100% by tracking points 1 to 5 (tip end and at 1325, 2650, 3975, and 5035 μm from the tip end). RESULTS Both tips increased their amplitude widths, drawing an S-curve at all points as the torsional power setting was increased, reaching their upper limits from 70% to 90% torsional power. At all 20 power settings, both tips showed significantly different amplitudes (all P < .01), and the difference of the amplitude increased as the power setting increased. Although, at points 1 and 3, the balanced tip amplitude was nearly 1.5 times larger than the mini tip amplitude, the amplitude difference was 10 μm or less at points 2 and 4. At point 5, the mini tip amplitude was at least 3 times more than the balanced tip amplitude. CONCLUSIONS The amplitude does not increase proportionally and varies markedly with the tip shape on reaching the upper limit, suggesting that a higher power setting might not contribute greatly to nuclear fragmentation. The balanced tip might cause greater damage to surrounding tissues if it is inserted at approximately 3 mm from the wound site. To obtain maximum shaft stability using the balanced tip, it is important to insert at least 5 mm.
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Tahiri Joutei Hassani R, Sandali O, Ouadfel A, Packer M, Romano F, Thuret G, Gain P, de Smet MD, Baudouin C. [What will cataract surgery look like in the future? Alternatives in the pipeline]. J Fr Ophtalmol 2020; 43:929-943. [PMID: 32778347 DOI: 10.1016/j.jfo.2020.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/18/2020] [Accepted: 05/18/2020] [Indexed: 10/23/2022]
Abstract
Phacoemulsification is the most frequently performed surgery in the world. Over the past few years, this surgery seems to have reached a plateau with no further innovative breakthroughs. In this paper, we focus on alternatives techniques, the latest innovations, and the research and development pipeline in this field.
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Affiliation(s)
- R Tahiri Joutei Hassani
- Service de chirurgie ambulatoire, centre hospitalier d'Avranches Granville, 849, rue des Menneries, 50400 Granville, France; Centre d'ophtalmologie de Granville, Granville, France.
| | - O Sandali
- Service de chirurgie ambulatoire, clinique Guillaume-de-Varye, Bourges, France
| | - A Ouadfel
- Service de chirurgie ambulatoire, centre hospitalier d'Avranches Granville, 849, rue des Menneries, 50400 Granville, France; Centre d'ophtalmologie de Granville, Granville, France
| | - M Packer
- Mark Packer MD Consulting, Inc., Boulder, Colorado, États-Unis
| | - F Romano
- Laboratoire académique stéphanois « Biologie, Ingénierie et Imagerie de la Greffe de Cornée » (BiiGC), Saint-Étienne, France
| | - G Thuret
- Laboratoire académique stéphanois « Biologie, Ingénierie et Imagerie de la Greffe de Cornée » (BiiGC), Saint-Étienne, France; Service d'ophtalmologie du CHU Nord, université Jean-Monnet, Saint-Étienne, France
| | - P Gain
- Laboratoire académique stéphanois « Biologie, Ingénierie et Imagerie de la Greffe de Cornée » (BiiGC), Saint-Étienne, France; Service d'ophtalmologie du CHU Nord, université Jean-Monnet, Saint-Étienne, France
| | - M D de Smet
- Preceyes BV, Eindhoven, Pays-Bas; MicroInvasive Ocular Surgery Center (MIOS sa), Lausanne, Suisse
| | - C Baudouin
- Service d'ophtalmologie III, Centre hospitalier national d'ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France; Sorbonne Université, Inserm, CNRS, Institut de la vision, 17, rue Moreau, 75012 Paris, France
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Palacio-Pastrana C, Chávez-Mondragón E, Soto-Gómez A, Suárez-Velasco R, Montes-Salcedo M, Fernández de Ortega L, Nasser-Nasser L, Baiza-Durán L, Olvera-Montaño O, Muñoz-Villegas P. Difluprednate 0.05% versus Prednisolone Acetate Post-Phacoemulsification for Inflammation and Pain: An Efficacy and Safety Clinical Trial. Clin Ophthalmol 2020; 14:1581-1589. [PMID: 32606573 PMCID: PMC7297453 DOI: 10.2147/opth.s254705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 05/20/2020] [Indexed: 01/30/2023] Open
Abstract
Background The purpose of this study was to compare the efficacy and safety of difluprednate 0.05% (PRO-145) versus prednisolone acetate 1% (Prednefrin® SF), for management of postoperative inflammation and pain, after cataract surgery. Methods This was a Phase III, multicenter, prospective, double-blind, clinical trial. Intent-to-treat population included 178 post-phacoemulsification patients that were assigned to receive either PRO-145, or prednisolone. One day after unilateral eye surgery, patients instilled a drop 4 times a day for 14 days (then tapering the dose downward for 14 days). The primary efficacy endpoints were anterior chamber (AC) cell grade and flare. Other parameters measured included: retinal central thickness (measured via OCT), conjunctival hyperemia, edema, pain and photophobia. Tolerability and safety were assessed through burning, itching, foreign body sensation, visual acuity (VA), intraocular pressure (IOP) and incidence of adverse events (AE). Results A total of 171 subjects were randomized (1:1) and completed the study. Compared to day 1, there was a significant improvement in the AC cell count and flare in both groups by the final visit (80.2% vs 88.4%, p=1.000). Conjunctival hyperemia improved in a similar fashion (81.2% vs 79%, p=0.234) in both PRO-145 and prednisolone groups, without differences between them. This was also observed for edema (82.4% vs 82.5%, p=0.246), pain (15.3% vs 7%, p=0.497) and photophobia (16.4% vs 15.1%, p=0.246), respectively. There was no significant difference between treatments for any tolerability parameter studied. Finally, at the 4-week postoperative visit, there were no significant differences between treatments for VA, IOP and AE results (p-values; 0.095, 0.053 and 0.099, respectively). Conclusion The results of this study suggest that PRO-145 is as effective and safe as prednisolone acetate in treating postoperative inflammation and pain in patients undergoing phacoemulsification. The study was registered at ClinicalTrials.gov as NCT03693989.
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Rao A, Sahay P, Das G, Sarangi S, Padhy D. Scoop and chop - A modified phaco-chop technique for pseudoexfoliation and cataract. Oman J Ophthalmol 2020; 13:57-62. [PMID: 32792799 PMCID: PMC7394071 DOI: 10.4103/ojo.ojo_114_2017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 12/05/2018] [Accepted: 03/08/2020] [Indexed: 11/04/2022] Open
Abstract
PURPOSE The purpose is to evaluate the results of the modified direct phaco-chop technique of cataract surgery in eyes with pseudoexfoliation. METHODS All patients with pseudoexfoliation and visually significant cataract with normal intraocular pressure (IOP) and optic nerve that underwent cataract surgery by the same surgeon using Infiniti®, OZil® Torsional handpiece (Alcon Labs), were included for this retrospective hospital-based study. Direct vertical or horizontal chop technique was used in all cases with parameters set as required for quadrant removal with high vacuum after the initial cleanup of cortex under the capsulorhexis. To allow better visualization of the hardness of the nucleus core, the sides of the lens were scooped out a central well with vacuum with maximum chopping done centrally within the rhexis as the first step to enable better assessment of the depth of burying the chopper for direct chop. Intraoperative details recorded and analyzed included ultrasound time and cumulative dissipated energy. The mean visual acuity and IOP before and after surgery were recorded at 1 day, 1 week, and 1 month. Complications during or after surgery were noted. RESULTS A total of 138 patients with a mean age of 62 ± 6.7 years underwent phachop technique of phacoemulsification for nuclear cataract grades of nuclear sclerosis 2-4 with significant improvement in visual acuity from baseline (0.26) to 3 months (0.82), P < 0.001. The mean ultrasound torsional amplitude and cumulative dissipated energy (CDE) were greater for brown cataract of grading >3, P = 0.02. A total of 8 patients had intraoperative zonular dialysis in 1 quadrant (none in >1 quadrant), which was not associated with intraoperative vitreous prolapse in 6 eyes. CONCLUSIONS Direct modified phaco-chop technique may be a safe technique in pseudoexfoliation due to minimal zonular stress with successful outcomes and reduced complications.
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Affiliation(s)
- Aparna Rao
- Glaucoma Services, LV Prasad Eye Institute, Mithu Tulsi Chernai Campus, Bhubaneswar, Odisha, India
| | - Priti Sahay
- Glaucoma Services, LV Prasad Eye Institute, Mithu Tulsi Chernai Campus, Bhubaneswar, Odisha, India
| | - Gopinath Das
- Glaucoma Services, LV Prasad Eye Institute, Mithu Tulsi Chernai Campus, Bhubaneswar, Odisha, India
| | - Sarada Sarangi
- Glaucoma Services, LV Prasad Eye Institute, Mithu Tulsi Chernai Campus, Bhubaneswar, Odisha, India
| | - Debananda Padhy
- Glaucoma Services, LV Prasad Eye Institute, Mithu Tulsi Chernai Campus, Bhubaneswar, Odisha, India
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Yao L, Bai H. Comparison of power-free-chop and phaco-chop techniques for moderate nuclei. BMC Ophthalmol 2020; 20:174. [PMID: 32357854 PMCID: PMC7195737 DOI: 10.1186/s12886-020-01455-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 04/27/2020] [Indexed: 11/10/2022] Open
Abstract
Background To compare the intraoperative and postoperative effects of power-free-chop and phaco-chop techniques for moderate nuclei in phacoemulsification surgery. Methods Sixty patients were evaluated in 2 groups. The power-free-chop technique was performed in Group 1 (30 eyes), and the phaco-chop technique was performed in Group 2 (30 eyes). There were no significant differences between these 2 groups. The cumulative dissipated energy (CDE), time to achieve maximum vision, corneal thickness variation, and time to return to the preoperative values were collected. All parameters were statistically compared in these 2 groups by using the chi-square test and the independent-sample t-test. Results The CDE was 5.53 ± 1.92 J in Group 1 and 7.02 ± 1.77 J in Group 2. After the operation, the mean time to recover to the maximum vision was 2.80 ± 1.42 days in Group 1 and 3.80 ± 1.92 days in Group 2. The mean postoperative corneal thickness increased 36.9 ± 14.74 μm in Group 1 and 46.20 ± 20.67 μm in Group 2. The mean time to return to preoperative pachymetry values was 3.73 ± 1.70 days and 4.83 ± 2.11 days in Group 1 and Group 2, respectively. There were significant differences in these parameters between the groups. Conclusions The power-free-chop technique had fewer negative effects on the corneal endothelium, as less ultrasound power was used for moderate nucleus cases. This can accelerate the functional healing process and the return to preoperative physiologic values.
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Affiliation(s)
- Lin Yao
- Qingdao Xinshijie Eye Hospital, 1011st, Dalao Road, Qingdao, 266199, China.
| | - Haiqing Bai
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
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Harb AW, Sadiq SN. Tilt-and-crush: A safe, effective and energy-saving technique for soft cataract removal. Eur J Ophthalmol 2020; 30:1162-1167. [PMID: 32024379 DOI: 10.1177/1120672120905311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND OBJECTIVE The tilt and crush technique is a modified chopping technique developed mainly to maximize safety and effectiveness in emulsifying soft cataracts. MATERIAL AND METHODS After clear corneal incision and continuous curvilinear capsulorhexis, the hydro-dissection cannula is introduced under the anterior capsule about 90 degrees to the axis of the main wound and injection of fluid is continued until the distal pole of the nucleus prolapses out of the capsulorhexis rim into the anterior chamber. The centre of the nucleus is then engaged with the phacoemulsification tip using high vacuum and tilted vertically in the anterior chamber. The second instrument is passed behind the full length of the vertically tilted nucleus to crush it against the phacoemulsification tip. RESULTS This technique was successfully performed in 517 eyes by a single experienced surgeon. The mean effective phaco time was 0.11 ± 0.32 s, and it was zero in 382 (73.9%) eyes. The mean total phaco time was 4.79 ± 10.71 s. In 322 (62.3%) eyes, no phaco energy was utilized to remove cataract. None of the eyes experienced any complication during or after the surgery. CONCLUSION This safe and reliable technique is significantly more energy-efficient compared to other traditional techniques like divide-and-conquer and phaco-chop. Unlike, some widely known pre-chopping techniques, it can be taught easily with good reproducibility.
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Affiliation(s)
- Ashraf Wasfy Harb
- Department of Ophthalmology, Hereford County Hospital, Hereford, UK.,Zagazig University Hospitals, Zagazig, Egypt
| | - Salman Naveed Sadiq
- Department of Ophthalmology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
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Das SJ, Wishart TFL, Jandeleit-Dahm K, Lovicu FJ. Nox4-mediated ROS production is involved, but not essential for TGFβ-induced lens EMT leading to cataract. Exp Eye Res 2020; 192:107918. [PMID: 31926131 DOI: 10.1016/j.exer.2020.107918] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 12/02/2019] [Accepted: 01/03/2020] [Indexed: 01/19/2023]
Abstract
The reactive oxygen species (ROS) producing enzyme, NADPH oxidase 4 (Nox4), is upregulated in response to TGFβ in lens epithelial cells in vitro, and its selective inhibition was shown to block aspects of TGFβ-induced epithelial-mesenchymal transition (EMT). In the present in situ study we validate the role(s) of Nox4 in TGFβ-induced lens EMT leading to anterior subcapsular cataract (ASC) formation. Mice overexpressing TGFβ in the lens, that develop ASC, were crossed to Nox4-deficient mice. When comparing mice overexpressing TGFβ in lens, to mice that were also deficient for Nox4, we see the delayed onset of cataract, along with a delay in EMT protein markers normally associated with TGFβ-induced fibrotic cataracts. In the absence of Nox4, we also see elevated levels of ERK1/2 activity that was shown to be required for TGFβ/Smad2/3-signaling. qRT-PCR revealed upregulation of Nox2 and its regulatory subunit in TGFβ-overexpressing lens epithelial cells devoid of Nox4. Taken together, these findings provide an improved platform to delineate putative Nox4 (and ROS) interactions with Smad2/3 and/or ERK1/2, in particular in the development of fibrotic diseases, such as specific forms of cataract.
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Affiliation(s)
- S J Das
- Discipline of Anatomy and Histology, Bosch Institute, The University of Sydney, Sydney, NSW, Australia
| | - T F L Wishart
- Discipline of Anatomy and Histology, Bosch Institute, The University of Sydney, Sydney, NSW, Australia
| | - K Jandeleit-Dahm
- Department of Diabetes, Monash University, Melbourne, VIC, Australia; Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - F J Lovicu
- Discipline of Anatomy and Histology, Bosch Institute, The University of Sydney, Sydney, NSW, Australia; Discipline of Clinical Ophthalmology & Eye Health, Save Sight Institute, Sydney, NSW, Australia.
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Guliani BP, Agarwal I, Naik MP. Effect of Uncomplicated Cataract Surgery on Central Macular Thickness in Diabetic and Non-diabetic Subjects. J Ophthalmic Vis Res 2019; 14:442-447. [PMID: 31875099 PMCID: PMC6825692 DOI: 10.18502/jovr.v14i4.5447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 03/24/2019] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To assess the quantitative changes of macula in diabetic and non-diabetic eyes after uncomplicated cataract surgery. METHODS In this prospective interventional study being performed in a tertiary healthcare hospital, a total of 660 eyes were divided into two groups. Group 1 included 330 eyes from healthy subjects and group 2 included 330 eyes from well-controlled diabetic subjects with no diabetic retinopathy planned for phacoemulsification with foldable IOL implantation by the same surgeon under similar settings. Optical Coherence Tomography (Heidelberg Spectralis SD-OCT) was used to assess preoperative and postoperative central macular thickness (CMT) at weeks 1 and 6. RESULTS The mean CMT in group 1 preoperatively, at postoperative week 1, and at post-operative week 6 was 257.03 ± 20.904, 262.82 ± 17.010, and 265.15 ± 20.078 µm, respectively. The corresponding values in group 2 were 255.36 ± 17.852, 259.15 ± 16.644, and 266.09 ± 18.844 µm, respectively. There was no significant difference in the mean CMT values between the two groups on any of the three occasions when the CMT was measured (P = 0.374 and P = 0.313 at weeks 1 and 6, respectively). CONCLUSION There was no statistically significant difference in CMT between normal subjects and diabetic subjects without diabetic retinopathy preoperatively and in early postoperative period after uncomplicated phacoemulsification surgery.
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Affiliation(s)
- Brahm Prakash Guliani
- Department of Ophthalmology, Vardhaman Mahavir Medical College & Safdarjung Hospital, New Delhi, India
| | - Isha Agarwal
- Department of Ophthalmology, Vardhaman Mahavir Medical College & Safdarjung Hospital, New Delhi, India
| | - Mayuresh P Naik
- Department of Ophthalmology, Hamdard Institute of Medical Sciences & Research, Hakeem Abdul Hameed Centenary Hospital, New Delhi, India
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Guerrier G, Rothschild PR, Bonnet C, Monnet D, Baillard C. Safety of low-dose propofol in non-fasted patients undergoing cataract surgery: a prospective cohort study. Br J Anaesth 2019; 123:e526-e528. [PMID: 31540667 DOI: 10.1016/j.bja.2019.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/16/2019] [Accepted: 08/22/2019] [Indexed: 11/28/2022] Open
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Sramka M, Slovak M, Tuckova J, Stodulka P. Improving clinical refractive results of cataract surgery by machine learning. PeerJ 2019; 7:e7202. [PMID: 31304064 PMCID: PMC6611496 DOI: 10.7717/peerj.7202] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/27/2019] [Indexed: 11/20/2022] Open
Abstract
AIM To evaluate the potential of the Support Vector Machine Regression model (SVM-RM) and Multilayer Neural Network Ensemble model (MLNN-EM) to improve the intraocular lens (IOL) power calculation for clinical workflow. BACKGROUND Current IOL power calculation methods are limited in their accuracy with the possibility of decreased accuracy especially in eyes with an unusual ocular dimension. In case of an improperly calculated power of the IOL in cataract or refractive lens replacement surgery there is a risk of re-operation or further refractive correction. This may create potential complications and discomfort for the patient. METHODS A dataset containing information about 2,194 eyes was obtained using data mining process from the Electronic Health Record (EHR) system database of the Gemini Eye Clinic. The dataset was optimized and split into the selection set (used in the design for models and training), and the verification set (used in the evaluation). The set of mean prediction errors (PEs) and the distribution of predicted refractive errors were evaluated for both models and clinical results (CR). RESULTS Both models performed significantly better for the majority of the evaluated parameters compared with the CR. There was no significant difference between both evaluated models. In the ±0.50 D PE category both SVM-RM and MLNN-EM were slightly better than the Barrett Universal II formula, which is often presented as the most accurate calculation formula. CONCLUSION In comparison to the current clinical method, both SVM-RM and MLNN-EM have achieved significantly better results in IOL calculations and therefore have a strong potential to improve clinical cataract refractive outcomes.
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Affiliation(s)
- Martin Sramka
- Department of Circuit Theory/Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
- Research and Development Department, Gemini Eye Clinic, Zlin, Czech Republic
| | - Martin Slovak
- Research and Development Department, Gemini Eye Clinic, Zlin, Czech Republic
| | - Jana Tuckova
- Department of Circuit Theory/Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Pavel Stodulka
- Research and Development Department, Gemini Eye Clinic, Zlin, Czech Republic
- Department of Ophthalmology/Third Faculty of Medicine, Charles University, Prague, Czech Republic
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Kiziltoprak H, Tekin K, Inanc M, Goker YS. Cataract in diabetes mellitus. World J Diabetes 2019; 10:140-153. [PMID: 30891150 PMCID: PMC6422859 DOI: 10.4239/wjd.v10.i3.140] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 02/05/2023] Open
Abstract
Diabetes mellitus (DM) is a chronic systemic disease that has increases in prevalence over time. DM can affect all ocular structures, with cataract being the most common ocular complication. Cataract is the leading cause of blindness worldwide. Due to several mechanisms, there is an increased incidence of cataract formation in the diabetic population. Advancements in technology have now made cataract surgery a common and safe procedure. However, the diabetic population is still at risk of vision-threatening complications, such as diabetic macular edema (ME), postoperative ME, diabetic retinopathy progression, and posterior capsular opacification.
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Affiliation(s)
- Hasan Kiziltoprak
- Department of Ophthalmology, University of Health Sciences, Ulucanlar Eye Training and Research Hospital, Ankara 06240, Turkey
| | - Kemal Tekin
- Ophthalmology Department, Ercis State Hospital, Van 65400, Ercis, Turkey
| | - Merve Inanc
- Ophthalmology Department, Ercis State Hospital, Van 65400, Ercis, Turkey
| | - Yasin Sakir Goker
- Department of Ophthalmology, University of Health Sciences, Ulucanlar Eye Training and Research Hospital, Ankara 06240, Turkey
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Femtosecond-Assisted Cataract Surgery in Residency Training. CURRENT OPHTHALMOLOGY REPORTS 2018. [DOI: 10.1007/s40135-018-0185-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Comparison of two popular nuclear disassembly techniques for cataract surgeons in training: divide and conquer versus stop and chop. Int Ophthalmol 2018; 39:2097-2102. [PMID: 30465292 DOI: 10.1007/s10792-018-1046-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 11/12/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE To compare two common phacoemulsification techniques in the learning curve phase, and their effect on ultrasound energy dissipation. METHODS One hundred and ten consecutive patients scheduled for cataract surgery with the same surgeon in training were prospectively enrolled. Study was divided in two parts. In the first one, 60 patients were stratified for cataract grade [nuclear opalescence (NO) grade 2-4] and divided in two groups receiving surgery with the divide-and-conquer technique (Group-1) and with the stop-and-chop technique (Group-2). In the second part, 50 patients were stratified according to cataract grade (NO2-6), and the surgeon had to choose one of the two techniques according to personal preference. The primary outcome was the cumulative dissipated energy (CDE). RESULTS Significant differences of CDE were observed between the NO3 and NO4 cataracts in Group-1. In Group-2, this difference was not significant, suggesting that with more advanced cataracts, the stop-and-chop technique allows less ultrasound use. In the second part of the study, the stop and chop was most frequently used for more advanced cataracts. When considering harder cataracts (NO5-NO6), patients receiving surgery with the divide-and-conquer technique had higher CDE values compared to stop and chop. CONCLUSIONS Both divide-and-conquer and stop-and-chop techniques are efficient in the learning curve. Stop and chop dissipates less energy in harder nuclei. Once surgeons reach sufficient experience with both techniques, they should switch to a stop-and-chop technique, allowing lower levels of ultrasound energy.
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Amir-Asgari S, Hirnschall N, Findl O. Using continuous intraoperative optical coherence tomography to classify swirling lens fragments during cataract surgery and to predict their impact on corneal endothelial cell damage. J Cataract Refract Surg 2018; 42:1029-36. [PMID: 27492102 DOI: 10.1016/j.jcrs.2016.04.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/20/2016] [Accepted: 04/22/2016] [Indexed: 11/18/2022]
Abstract
PURPOSE To quantify and classify swirling lens fragments during cataract surgery and record their impact on the corneal endothelium using continuous intraoperative optical coherence tomography (OCT). SETTING Vienna Institute for Ocular Surgery, Hanusch Hospital, Vienna, Austria. DESIGN Prospective case series. METHODS Patients scheduled for cataract surgery without other ophthalmologic comorbidities were included. During surgery, continuous OCT recordings were performed to measure and score swirling lens fragments that came into contact with the corneal endothelium. Endothelial cell density (ECD) was measured preoperatively and 1 month postoperatively. In addition, the central corneal thickness and aqueous flare were measured preoperatively and 1 hour, 1 day, and 1 month postoperatively. RESULTS Continuous intraoperative OCT video recordings showed 104 swirling lens fragments in 40 eyes that came into contact with the corneal endothelium. A mean of 2.6 lens fragments (range 0 to 6) that came into contact were observed per eye. Small fragments and fragments touching the center of the endothelium had a significantly greater effect on postoperative ECD than other fragment parameters. The predictive power of the fragment score on ECD was found to be moderate (r(2) = 0.6). CONCLUSIONS Small swirling lens fragments touching the center of the corneal endothelium had a significant influence on ECD. With the newly developed fragment score, it was possible to predict the operative endothelial cell loss. FINANCIAL DISCLOSURE None of the authors has a financial or proprietary interest in any material or method mentioned.
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Affiliation(s)
- Sahand Amir-Asgari
- From the Vienna Institute for Research in Ocular Surgery (Amir-Asgari, Hirnschall, Findl), A Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria, and the Moorfields Eye Hospital NHS Foundation Trust (Findl), London, United Kingdom
| | - Nino Hirnschall
- From the Vienna Institute for Research in Ocular Surgery (Amir-Asgari, Hirnschall, Findl), A Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria, and the Moorfields Eye Hospital NHS Foundation Trust (Findl), London, United Kingdom
| | - Oliver Findl
- From the Vienna Institute for Research in Ocular Surgery (Amir-Asgari, Hirnschall, Findl), A Karl Landsteiner Institute, Hanusch Hospital, Vienna, Austria, and the Moorfields Eye Hospital NHS Foundation Trust (Findl), London, United Kingdom.
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Haddadi S, Shahrokhirad R, Ansar MM, Marzban S, Akbari M, Parvizi A. Efficacy of Preoperative Administration of Acetaminophen and Melatonin on Retrobulbar Block Associated Pain in Cataract Surgery. Anesth Pain Med 2018; 8:e61041. [PMID: 30533388 PMCID: PMC6240829 DOI: 10.5812/aapm.61041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 07/25/2018] [Accepted: 08/08/2018] [Indexed: 12/16/2022] Open
Abstract
Background Retrobulbar block is one of the chosen methods for local anesthesia in cataract surgery. Since it is a painful procedure, using analgesic and sedative drugs is recommended. Current medications have side effects and evaluating of new drugs or new uses of existing safer drugs is necessary. Objectives The aim of this study was to compare the administration of melatonin and acetaminophen on pain and hemodynamic changes during retrobulbar block. Methods In a double-blinded randomized trial, 180 patients undergoing cataract surgery were randomly divided into three groups: Melatonin group (received melatonin 6 mg), acetaminophen group (received acetaminophen 500 mg), and control group (received placebo). All drugs were administered orally 60 min before arrival to the operating room by nurses blinded to the drugs administered. All patients received fentanyl 0.5 μg/kg before retrobulbar block intravenously. Hemodynamic variables and pain score in each patient were evaluated on arrival in the operating room, during retrobulbar block, during surgery, 20 min after operation, at the end of surgery, and in the recovery room. In case of pain score more than three, additional fentanyl was administered. All data were recorded in structured data sheets. Results Data analysis indicated no significant differences among the groups at baseline on any of the demographic variables. Both acetaminophen and melatonin reduced the pain score significantly compared with control during retrobulbar block (P < 0.05 and P < 0.01, respectively). Administration of additional fentanyl was significantly lower in the melatonin group than the control group (P < 0.05). Hemodynamic changes were not significantly different among all groups. Conclusions For the first time, as far as we have studied, the analgesic effect of acetaminophen on the retrobulbar block was indicated. We also showed that melatonin can reduce pain during retrobulbar block leading to reduction of additional fentanyl during operation. It seems that both melatonin and acetaminophen may have a beneficial effect on pain control in the retrobulbar block.
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Affiliation(s)
- Soudabeh Haddadi
- Anesthesiology Research Center, Department of Anesthesiology, Al-Zahral Hospital, Guilan University of Medical Sciences, Rasht , Iran
| | - Reyhaneh Shahrokhirad
- Anesthesiology Research Center, Department of Anesthesiology, Al-Zahral Hospital, Guilan University of Medical Sciences, Rasht , Iran
| | - Malek Moien Ansar
- Neuroscience Research Center, Department of Biochemistry, Poursina Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
- Department of Biochemistry, Guilan University of Medical Sciences, Rasht, Iran
- Corresponding Author: Department of Biochemistry, Guilan University of Medical Sciences, Rasht ,Iran. Tel: +98-9113313463,
| | - Shideh Marzban
- Anesthesiology Research Center, Department of Anesthesiology, Al-Zahral Hospital, Guilan University of Medical Sciences, Rasht , Iran
| | - Mitra Akbari
- Ophthalmic Research Center, Guilan University of Medical Sciences, Rasht, Iran
| | - Arman Parvizi
- Anesthesiology Research Center, Department of Anesthesiology, Al-Zahral Hospital, Guilan University of Medical Sciences, Rasht , Iran
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Masis M, Mineault PJ, Phan E, Lin SC. The role of phacoemulsification in glaucoma therapy: A systematic review and meta-analysis. Surv Ophthalmol 2018; 63:700-710. [DOI: 10.1016/j.survophthal.2017.08.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 08/16/2017] [Accepted: 08/21/2017] [Indexed: 11/28/2022]
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Schweitzer C. La cataracte, une pathologie courante. ACTUALITES PHARMACEUTIQUES 2018. [DOI: 10.1016/j.actpha.2018.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Purpose (1) To use finite element (FE) modelling to estimate local iris stresses (i.e. internal forces) as a result of mechanical pupil expansion; and to (2) compare such stresses as generated from several commercially available expanders (Iris hooks, APX dilator and Malyugin ring) to determine which design and deployment method are most likely to cause iris damage. Methods We used a biofidelic 3-part iris FE model that consisted of the stroma, sphincter and dilator muscles. Our FE model simulated expansion of the pupil from 3 mm to a maximum of 6 mm using the aforementioned pupil expanders, with uniform circular expansion used for baseline comparison. FE-derived stresses, resultant forces and area of final pupil opening were compared across devices for analysis. Results Our FE models demonstrated that the APX dilator generated the highest stresses on the sphincter muscles, (max: 6.446 MPa; average: 5.112 MPa), followed by the iris hooks (max: 5.680 MPa; average: 5.219 MPa), and the Malyugin ring (max: 2.144 MPa; average: 1.575 MPa). Uniform expansion generated the lowest stresses (max: 0.435MPa; average: 0.377 MPa). For pupil expansion, the APX dilator required the highest force (41.22 mN), followed by iris hooks (40.82 mN) and the Malyugin ring (18.56 mN). Conclusion Our study predicted that current pupil expanders exert significantly higher amount of stresses and forces than required during pupil expansion. Our work may serve as a guide for the development and design of next-generation pupil expanders.
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