<p>A rapid technique for en masse soft cataract phacoemulsification</p>

Abstract

Purpose: To describe a new, en masse, stepwise technique for purely soft cataracts. Methods: RAPID, a soft cataract phacoemulsification technique, is an acronym-based procedure where R is rotation of nucleus, A is alignment of phacoemulsification tip sideways, P is placement of tip adjacent to the nuclear rim, I is impaling of tip into nuclear rim and D is devouring wherein nucleus is aspirated/emulsified. RAPID technique was performed in 54 eyes of 54 patients (31 males and 23 females; mean age 46.35±3.95 years). The soft nucleus was emulsified, after performing hydrodissection, in a stepwise manner in the safe zone away from posterior capsule and corneal endothelium. Centurion/Infiniti Phacoemulsification system (Alcon Laboratories, Inc.) was used with vacuum parameters at 475 mm Hg and an aspiration flow rate of 0–45 mL/min in linear mode. The primary outcome measures were cumulative dissipated energy (CDE), ultrasound time (UST), amount of fluid used, surgical complications and mean endothelial cell loss. Results: Phacoemulsification with IOL implantation was performed successfully in all patients without any intraoperative complications. CDE was 1.03±0.61. Total UST for nuclear emulsification was 3.84±3.27 seconds and fluid used was 10±2.35 milliliters. Postoperative follow-up examinations were done on 1, 4, 14, 30 and 90 days. Mean percentage of endothelial cell loss was 7.05±2.65% (mean endothelial cell counts were 2383.75±105.21 cells/mm 2 preoperatively and 2215.78±114.9 cells/mm 2 3 months postoperatively). Conclusion: RAPID is an en masse non-fragmentation technique for purely soft cataracts. This technique requires neither any specialized instrumentations nor the use of high vacuum with complimenting surge preventing software. Simple stepwise multi-planer approach of RAPID technique allows easy and fast emulsification of soft cataracts with simultaneous safeguarding of posterior capsule and corneal endothelium.

Novel nucleus management technique in hypermature morgagnian cataracts with liquified cortex during phacoemulsification

“…Surgeons use different phacoemulsification tips and techniques to emulsify the nucleus successfully. 12 Phacoemulsification has been shown to be safe and effective in managing hypermature cataracts as most surgeons resort to conventional techniques such as stop and chop or direct chop. 2,5,7,8,13 Sato et al, 14 in their technique, described nucleus stabilization by careful injection of 2.3% sodium hyaluronate OVD both anterior and posterior to the nucleus.…”

Zero Phaco: A new technique for dealing with soft cataracts

“…[ 18 ] They are frequented by a cataract surgeon nowadays due to the increasing patient awareness and early presentation to the clinic. [ 14 ] These patients have high expectations on the visual outcome as they are young and the preoperative vision is fair. While phacoemulsification of hard cataracts has received much consideration and most surgeons routinely perform the divide-and-conquer or the phaco chop technique, softer cataracts are not conducive to these techniques.…”

“…The divide-and-conquer,[ 9 ] stop-and-chop,[ 10 ] phaco rolling,[ 11 ] visco-fracture,[ 12 ] bowl-and-snail,[ 13 ] and Rotation Alignment Placement Impaling Devouring (RAPID) technique for soft cataract phacoemulsification, or other methods have been used to remove a soft nucleus. [ 14 ]…”

Real-time switching thirteen-level modified CHB-Multilevel inverter using artificial neural network technique based on selective harmonic elimination

“…, where l is the number of independent DC sources. Actually, this nonlinear transcendental equation cannot be calculated by simple mathematical equation, and virtually need to be carried out with complicated methods such as the iterative approach methods like the N-R, PSO, FFA and ANN techniques [19,20].…”