The AMO PhacoFlex SI-18NGB and PhacoFlex II SI-30NGB silicone lens materials resisted UV light degradation over 50 years of simulated exposure.
The sound speed for the Sensar acrylic IOL differs significantly from that of PMMA and various silicone materials. Corrections for material sound speed must be made to obtain correct pseudophakic axial lengths.
In the last decades, many surface modification technologies have been developed in an attempt to improve the function of medical device surfaces by adding or enhancing surface characteristics. These value-added processes included treatment to affect lubricity, hemocompatibility and drug delivery. A unique hydrophilic, lubricious coating was developed to treat hydrophobic polymer surfaces. The coating platforms described are composed of a polyelectrolyte molecular film containing hydrophilic, lubricant molecules. The molecular film is then further cross-linked with di-functional aldehyde molecules to form an interpenetrating network (IPN). The IPN entraps lubricant molecules in the matrix and provides for prolonged stability of the lubricity. This coating was applied to cartridges which were used to deliver intraocular lenses (IOLs) that replaced the cataractous crystalline lenses in patients In order to determine the safety and effectiveness of the coating, a rabbit in vivo study was designed to evaluate the ease of implantation and postoperative response to implantation of the foldable acrylic IOLs. The performance evaluation of the lubricious treated cartridges focused on the ease of insertion and post-IOL implantation response. It was found that the UNFOLDER Emerald Insertion System (Advanced Medical Optics) with lubricious treated cartridges generally required lower insertion forces than the standard UNFOLDER Emerald cartridges. The postoperative inflammatory response following lens extraction and posterior chamber implantation of low (6D), medium (20D) and high (30D) diopter foldable acrylic IOLs with both treated and standard cartridges was mild. Inflammation generally resolved by 3 weeks. Thus, in this animal study, the coating was shown to be effective in assisting the delivery of IOLs through cartridges, without causing any adverse effects.
We compared the sound speeds of SLM-1/UV (990 M/sec at 35 degrees Celsius [degrees C]), SLM-2/UV (1090 M/sec at 35 degrees C), and Perspex CQ poly(methyl methacrylate)(2658 M/sec at 35 degrees C). Methods are presented to determine the correction of axial length (CAL) factors for axial length measurements made on pseudophakes with AMO PhacoFlex Si-18, Si-26 (SLM-1/UV), and AMO PhacoFlex II SI-20 or SI-30 (SLM-2/UV) silicone intraocular lenses (IOLs). A CAL is required to avoid potential errors with secondary IOL power predictions; CALs, which are strongly dependent on the material sound speed and less so on lens thickness, ranged from -0.65 mm to -1.20 mm for SLM-1/UV silicone IOLs and from -0.35 mm to -0.55 mm for SLM-2/UV silicone IOLs. The sound speeds of IOL materials varied insignificantly between ambient room temperature (23 degrees C) and intraocular temperature (35 degrees C).
Dear Friends, Orthopaedics was a nascent branch some 60 years back, when it was born out of Surgery. There were few dynamic personalities working as orthopaedician under General Surgeons and they had to fight for their existence. We have come a long way from there and now, there may be more than 17 sub branches [specialties] in orthopaedics itself. Currently, it is not possible for an orthopaedician to be a master of all the sub branches, hence the need for separate symposium issue in the Journal, for Pelvis and Acetabulum Injuries. [Till the time, may be, when we may have a separate journal for Pelvis and Acetabulum in India]. This is the second part of the Symposium Issue on Pelvis and Acetabulum, and we have covered five chapters written by different masters of the field from AIIMS Delhi, PGI- Chandigarh, Apollo Delhi etc Each article has some important take home messages which I would like to draw the attention of the reader, As in the chapter on –Dual Approach, the author has very well explained why dual approach-? and which approach first for certain T fractures and T type fractures. In the article on Ilio Femoral Approach-author has emphasized need for fractures lateral to iliopectineal line. In the chapter on Pelvic fractures, the author has explained importance of posterior ligaments complex, in lateral compression and vertical shear fractures and variants of lateral compression type fractures. In the article on Digastric Flip Osteotomy- There comes a time in acetabular fractures-posterior wall and or posterior column fractures when simple Kocher-Langenbeck Approach seems handicapped and you need to have some extension, as in cases of cranial extension of posterior wall fractures and /or need to retrieve loose segments from acetabular joint when with all efforts made by traction, space seems wanting. Hope you will find it helpful in your day to day practice as the authors have put their combined experience in preparing these manuscript. I also take this opportunity to invite you to 4th Cadaveric Pelvi-Acetabular fracture fixation workshop on 11th November in Lucknow We will soon have the third issue of the symposium in hand Dr Harish Makker Symposium Editor – Trauma International.
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