Purpose: To fine tune the default depth and rate of ablation of the epithelium in cTen™ customized trans-epithelial one-step superficial refractive surgery by the comparison between the attempted post-operative ideal corneal shape and the achieved corneal shape.
Methods: 88 consecutive eyes in 64 patients undergoing trans-epithelial superficial excimer ablation using the iVis laser Suite for either myopic/astigmatic or hyperopic/astigmatic refractive error. Each patient had at least 3 months of post-operative follow-up. Topographic examination of all eyes was carried out pre-operatively and at least 3 months post-operatively using the Precisio™ surgical topographer. The comparison of these two measurements yielded values for depth, volumes and rates of ablated corneal tissue. By determining the different ablation rates of stroma and epithelium, a refinement of the depth of epithelium to be removed and a refinement of the stromal ablation were calculated.The mathematical model was applied on each one of the 88 clinical cases and the parameters for the fine tuning of the default depth and rate of ablation of the epithelium were determined using the least squares method.
Results: The calculated pure stromal ablation rate was less than the average epithelium/stroma ablation rate used in planning the treatments by a factor of 0.96. The epithelial thickness predefined ablation assumption used to plan removal of the epithelium was adjusted considering the measured ablation and a radial adjustment function established for the fine tuning of the laser radial efficiency and allowing for the normal thickening of the epithelium in the peripheral cornea. From a clinical point of view, this methodology produces an improvement of the efficacy and a reduction of the variance of the clinical results.
Conclusion: Comparison of accurately measured pre and postoperative topographies yields accurately established ablation rates of stroma and epithelium in trans-epithelial one step superficial ablation.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6889590 | PMC |
| http://dx.doi.org/10.1186/s40662-019-0159-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
CAMKIIδ Reinforces Lipid Metabolism and Promotes the Development of B Cell Lymphoma.
Adv Sci (Weinh)
January 2025
Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
The most prevalent types of lymphomas are B cell lymphomas (BCL). Newer therapies for BCL have improved the prognosis for many patients. However, approximately 30% with aggressive BCL either remain refractory or ultimately relapse.
View Article and Find Full Text PDFCase Report: Left ventricular assist device implantation combined with cryoballoon ablation for ventricular tachycardia.
Front Surg
January 2025
Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
We report a case of a patient with dilated cardiomyopathy who experienced recurrent ventricular tachycardia (VT) and multiple defibrillations following CRT-D implantation. Due to worsening cardiac function, the patient required surgical implantation of a left ventricular assist device (LVAD) as a bridge to heart transplantation. During the procedure, we used the Ensite three-dimensional mapping system to perform activation and substrate mapping of the VT targets, followed by endocardial and epicardial cryoballoon ablation of clinical VT.
View Article and Find Full Text PDFThoracic Epidural and Intercostal Nerve Cryoablation in Multimodal Analgesia for Acute Pain Management of Rib Fractures: A Case Report.
Cureus
December 2024
Anesthesiology, Rhode Island Hospital, Brown University, Providence, USA.
Acute pain service was consulted for acute pain management in a 40-year-old male who had sustained multiple bilateral rib fractures following a fall injury. In addition to the rib fractures, the patient had also experienced injuries to his lungs and spinal column, both of which required surgeries. Considering the significant nature of pain due to his rib fractures, a multimodal pain management approach that included both pharmacological and non-pharmacological strategies was utilized.
View Article and Find Full Text PDFOptical coherence tomography-enabled classification of the human venoatrial junction.
J Biomed Opt
January 2025
Columbia University, Department of Electrical Engineering, New York, United States.
Significance: Radiofrequency ablation to treat atrial fibrillation (AF) involves isolating the pulmonary vein from the left atria to prevent AF from occurring. However, creating ablation lesions within the pulmonary veins can cause adverse complications.
Aim: We propose automated classification algorithms to classify optical coherence tomography (OCT) volumes of human venoatrial junctions.
WNT/β-catenin-M2 macrophage interplay as a target for therapy against hepatocellular carcinoma: Role of .
World J Gastroenterol
January 2025
Department of Gastroenterology, University Hospital of Larisa, Larisa 41100, Greece.
Liver cancer, and in particular hepatocellular carcinoma (HCC) is a disease of rising prevalence and incidence. To date, definitive treatment options include either surgical excision or ablation of the affected area. With increasing research on several pathways that could be involved in the progression of HCC, new elements within these pathways emerge as potential targets for novel therapies.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!