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From Abe to MoXy™ and Beyond Part 5: More Fibers of the 1990s February 27 2017

John Brekke’s fiber design from 1994 is one of the few lateral fiber designs of the era that remains on the market today, marketed as Scatterfree™ by Laser Peripherals. As can be seen in figures 10 and 11 (below the next paragraph) taken from the first patent, the concept is simple and it does basically work. In contrast to Pon, however, Brekke failed to properly identify the true sources of...

From Abe to MoXy™ and Beyond -- Part 4: The 1990s Boom February 06 2017

The 1990s saw a boom in laser TURP (Transurethral Resection of the Prostate) using mostly Nd:YAG lasers. Nd:YAGs showed promise for lowering the classical side effects of standard TURP, where a hot wire loop is used to melt/carve away strips of hyperplastic tissue; their CW (continuous wave) output produced smoother surfaces than holmium lasers do, they did not strongly interact with the sterile irrigation fluid and were less damaging to...

From Abe to MoXy™ and Beyond; Part 3 -- Moses' Math Works January 16 2017

Part 3 is a bit of a departure from my planned sequence for this series. A colleague has graciously permitted me to share a slow motion video that he produced of a generic side fire fiber delivering a single pulse of holmium energy into a beaker of water. Herein I hope to demonstrate that surgical fiber performance can be modeled/predicted, and quite accurately, and that there isn't anything mysterious or magical involved. Sure,...

From Abe to MoXy™ and Beyond; Part 2 -- Abe's Side Fire Solution(s) January 09 2017

Part 1 of this series was mostly a review of Snell's law and Fresnel reflections as they explain the weird output of bevel polished fibers. Here we see some more Snell and Fresnel issues and the earliest Band-Aid® treatments designed to mitigate these issues. Part 2: Abe's Solution(s) Before we get into what Abe saw as solutions to the issues outlined, we should probably address the problem that I alluded...

Side Fire Fiber Technology – From Abe to MoXy™ and Beyond: Part 1 (Basics) December 30 2016

Part 1: Fiber Optics Fundamentals (a prerequisite to understanding side fire fibers) I’ve been told a half dozen tales that purport to describe the origin of fiber optics and likely as many claiming to describe the first side fire fiber, but there is little or no evidence for any stories I have heard over my 30+ years in the field…except the tale of “the Hitachi patent”. Anyone working in side...

Introducing the ProView™ 30X SMA Inspection Microscope December 15 2016

InnovaQuartz is pleased to offer a low cost but high performance solution for inspecting SMA (and Trimedyne in January 2017) terminated laser surgical fibers. This battery powered (batteries included) microscope is equipped with a thread-free SMA (or Trimedyne) port that positions the fiber input face within the field of view with acute angle illumination from below. Every detail of the connector face is exposed: scratches, dirt and burns are detected...

What are Holmium Laser Fiber Sizes, Really? November 21 2016

Section 502 of the Federal Food, Drug and Cosmetic Act (FFDCA) says that a device is misbranded if its labeling is false or misleading in any particular. Maybe the FDA doesn’t read Urology? I’m referring to a paper that appeared in the journal Urology a couple of years ago*, questioning the veracity of holmium laser fiber manufacturers in describing the diameters of their fiber devices. The conclusion was that nobody told the truth. That...

The Power of Collimation IV: Going the Extra Mile November 08 2016

This final Chapter in the blog series, "The Power of Collimation", explores the apparent paradox that ProFlex is able to reject potentially damaging, high angle laser energy within the focus while continuing to deliver more laser energy to the stone than any other holmium laser fiber. 

 

Ho:YAG Fibers: One 'Size' Does Not Fit All September 19 2016

Today I was asked a question by a prospective customer that I wish to share with the marketplace at large; that marketplace being laser surgical intervention for kidney and gall bladder stones by endoscopy.   Q – I have then an additional question, why do you make 2 SMA version adapted to different brand of laser box. When I look at most of urology company offers, they mentioned that their...

Smooth Passage™ Holmium Fiber Tips on ProFlex™ LLF August 29 2016

In the course of studying other manufacturers' holmium laser fibers we sometimes observe surprising differences. In this case, we knew that our tips were different -- heck, we gave them a special name -- but  just how much difference they made was the surprise.      The two fibers in the photo are "1000 micron", meaning they have either a 910 μm or 940 μm core inside a 1 mm diameter glass cladding. The upper...

The Devitrification Cascade -- Blast Shield Disease & Contagion August 15 2016

Initiation, Progression and Transmission of Holmium Laser Blast Shield Failures My business partner has repeatedly told me not to assume that others know what I know – “Get the information out there, Stephen. Much that you take for granted is new and valuable to others.” It’s hard to know what these nuggets of value are. I am usually enlightened by a customer question, complaint or concern. That is the case for...

All Holmium Laser Fibers are the Same, Right? Part 9 August 02 2016


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