Ultrasonic System for Cataract Characterization and Optimal Phacoemulsification Energy Evaluation
- Conditions
- Ultrasound Therapy; ComplicationsCataract
- Interventions
- Device: Eye Scan Ultrasound System (ESUS)
- Registration Number
- NCT04461912
- Lead Sponsor
- University of Coimbra
- Brief Summary
This study aims to assess the performance of an ultrasonic system for automatic classification of cataract type and severity, as well as the estimation of the optimal phacoemulsification energy. Ultrasonic signals from the lens will be acquired with the Experimental Medical Device (ESUS) in participants with cataract, and in healthy subjects (control).
The proposed technique may represent an important advance in cataract treatment. The quantitative and automatic classification of cataract type and severity, and the estimation of the optimal phacoemulsification energy is may represent a valuable tool for surgical planning, reducing complications associated to excessive levels of phacoemulsification energy, as well as the times spent on surgeries. This device may be relevant not only for patients, but also for public health systems, reducing waiting lists and associated costs.
- Detailed Description
This is a prospective, pivotal, non-blinded study. Fifty (50) participants will be recruited at the Coimbra Surgical Center of Portugal. The study will be conducted on subjects with age-related cataract, and on healthy subjects as control group. Since this is a pilot study, no sample size estimation has been implemented. The statistical power will be determined at the end of the study. Only per-protocol participants will be considered on statistical analysis.
Procedures involved. The ultrasonic system (Experimental Medical Device - ESUS) works in A-scan mode, with an acoustic working frequency of 20 MHz. From the ultrasonic signals backscattered from the lenses, acoustic parameters will be extracted, and used for automatic algorithms implementation. This study will be implemented once.
Slit lamp with LOCS III classification will be used as comparator. Contrast sensitivity test results will be used for incipient cataract detection, where slit lamp may present some limitations. Optical coherence tomography and specular microscopy will help on detecting postoperative complications; other complications identified by the physician will be also considered. Surgical parameters as phacoemulsification energy and surgical time will help on phacoemulsification energy evaluation.
Safety assessment. The system uses an ophthalmic probe. There are not anticipated adverse events related to the procedures involved in the use of the ultrasonic system, or any other procedure in the protocol. The safety conditions will be monitored through the occurrence of unanticipated adverse events or serious adverse events. If these situations occur, the event will be reported to the competent authorities (in agreement with the current regulation) and the corrective actions will be implemented.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 50
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Control Eye Scan Ultrasound System (ESUS) Participants on which the presence of cataract have been excluded Cataract Eye Scan Ultrasound System (ESUS) Participants with diverse types and severities of cataract, that should realize phacoemulsification surgery
- Primary Outcome Measures
Name Time Method Presence of Cataract baseline Presence of cataract obtained with the Experimental Medical Device (ESUS)
- Secondary Outcome Measures
Name Time Method Cataract classification baseline Cataract type and severity obtained with the Experimental Medical Device (ESUS) - based on the LOCS III (Lens Opacity Classification System)
Cataract hardness before the intervention/procedure/surgery Cataract hardness estimated with the Experimental Medical Device (in Gpa)
Phacoemulsification energy immediately after the intervention/procedure/surgery Phacoemulsification energy level estimated with the Experimental Medical Device in the participants performing cataract surgery (considering the phacoemulsification energy parameters provided by the phacoemulsifier).
Trial Locations
- Locations (1)
Centro Cirúrgico de Coimbra (CCCI)
🇵🇹Coimbra, Portugal