Article

Cold ultrasound technology more efficient than laser phaco

Author(s):

San Diego-Cold ultrasound technology [WhiteStar, Advanced Medical Optics Inc. (AMO)] allows the efficient removal of all densities of cataracts and is as safe as a pulsed laser microincision phacoemulsification system. A major advantage of the cold ultrasound system is that it dramatically reduces the phacoemulsification time compared with laser phacoemulsification.

"With both systems, it is possible to perform microincision cataract surgery because the temperature of the tip increases very little, and it is possible to work without the sleeve over the tip of the instrument," said Alessandro Franchini, MD, assistant director, University of Florence Eye Institute, Florence, Italy. "With both machines, it is possible to perform the surgery through two 1.1-mm incisions, and because of this, new instruments-new blades, capsulorhexis forceps, and an irrigating chopper -have had to be designed to work through such small incisions."

He and his colleagues compared the results obtained with the WhiteStar cold ultrasound system with those from the Phaco- Lase (Asclepion-Meditec Co.). Eighty-six patients underwent cataract extraction with the cold ultrasound system and 274 with the laser phacoemulsification system.

Time comparison However, the investigators found an important difference between the two instruments in the effective phacoemulsification time.

"When the laser was used to remove cataracts . . . with a density of 1, the effective phacoemulsification time was 24 seconds," Dr. Franchini reported. "In contrast, when cold ultrasound was used to remove the same-density cataract, the effective phacoemulsification time was less than 1 second. When removing the hardest 4+ cataracts, cold ultrasound required only 14 seconds compared with almost 9 minutes for the laser."

Based on these results, regarding safety, the investigators concluded that laser and cold ultrasound are equally safe instruments. Using the two methods, it is possible to achieve clear corneas on the first postoperative day and there is very little increase in the temperature of the tip, making it possible to perform a bimanual technique, Dr. Franchini explained.

"Regarding the efficiency of the technique, however, cold ultrasound technology is more efficient compared with laser. We found a significant reduction in the effective phacoemulsification time. It is possible to remove lenses of all densities through an incision of about 1 mm," he concluded.

Newsletter

Don’t miss out—get Ophthalmology Times updates on the latest clinical advancements and expert interviews, straight to your inbox.

Related Videos
(Image credit: Ophthalmology Times) ASCRS 2025: Parag Majmudar, MD, on bridging the gap between residency and real-world practice
Brett Bielory, MD, discusses his poster at the ASCRS annual meeting, which focuses on an under-diagnosed corneal pathology: neurotrophic keratitis.
(Image credit: Ophthalmology Times) Oluwatosin U. Smith talks Glaukomtecken
ASCRS 2025: Eva Kim, MD, discusses implantable collamer lenses and high myopia.
Abby Markward, MBA, and Hattie Hayes, editor of Ophthalmology Times Europe, discuss the ASCRS and ASOA meetings
Abby Markward discusses the ASCRS Foundation and the ASCRS Annual Meeting
(Image credit: Ophthalmology Times) Inside ASCRS 2025: Francis S. Mah, MD, takes the helm with a vision for research, education, and advocacy
© 2025 MJH Life Sciences

All rights reserved.