𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fragmentation of biliary stones with a 308 nm excimer laser

✍ Scribed by Weiqiang Shi; Thanassis Papaioannou; Leon Daykhovsky; Sandor G. Vari; Warren S. Grundfest

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
684 KB
Volume
10
Category
Article
ISSN
0196-8092

No coin nor oath required. For personal study only.

✦ Synopsis

The use of a XeCl excimer laser (308 nm) for biliary stone f r a g mentation is reported. Laser energy is delivered via UV grade fused silica fibers to the target stones immersed in normal saline solution. Sixty biliary calculi-pigment (n = 40), and cholesterol (n = 20)-were fragmented in vitro. The total energy delivered per unit mass of the stone is kept constant. Two energy fluences (80 and 110 mJ/mm2) at two repetition rates (5 and 20 Hz) delivered through fibers of two core sizes (300 and 600 bm) are utilized to study the effect of different laser parameters on the fragmentation process. Although both pigment and cholesterol stones are susceptible to excimer laser fragmentation, higher fragmentation efficiency is obtained for the pigment stones than for the cholesterol stones. Our study suggests that higher energy fluence and larger fiber core size result in higher fragmentation efficiency for pigment stones. Fragmentation thresholds at stone surface for a variety of biliary calculi of known composition were measured. The threshold energy fluence is approximately 3 mJ/mm2 and 17 mJ/mm2 for pigment and cholesterol stones, respectively. Our study indicates that the 308 nm excimer laser may be effective as a laser lithotriptor with low threshold and good efficiency for biliary stone fragmentation.

πŸ“œ SIMILAR VOLUMES

308 nm Excimer laser ablation of cartila
308 nm Excimer laser ablation of cartilage
✍ John A. Prodoehl; Anthony L. B. Rhodes; Robert S. Cummings; Menachem M. Meller; πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 654 KB

This article reports the investigation of the XeCl excimer laser as a cutting-ablating tool for human fibrocartilage and hyaline cartilage. Quantitative measurements were made of tissue ablation rates as a function of fluence in meniscal fibrocartilage and articular hyaline cartilage. A force of 1.4

A 308-nm excimer laser for the treatment
A 308-nm excimer laser for the treatment of scalp psoriasis
✍ Charles R. Taylor; Ashley L. Racette πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 196 KB

## Abstract ## Background and Objectives Scalp psoriasis is a frustrating disorder whose treatments can all too often be cumbersome and ineffective. Our objective was to test a combination device involving the 308‐nm excimer laser in tandem with a hair blower for treating scalp psoriasis. ## Stud

Treatment of alopecia areata with the 30
Treatment of alopecia areata with the 308-nm xenon chloride excimer laser: Case report of two successful treatments with the excimer laser
✍ Cuneyt Gundogan; BΓ€rbel Greve; Christian Raulin πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 209 KB

## Abstract ## Background and Objectives Alopecia areata is a common disease of unknown etiology; it causes significant cosmetic and psycho‐social distress for most of the people it affects. We report on an innovative form of treatment in two patients with typical alopecia areata on the capillitiu

Development of a new technique for reduc
Development of a new technique for reducing pressure pulse generation during 308-nm excimer laser coronary angioplasty
✍ Tcheng, James E. ;Wells, Lisa D. ;Phillips, Harry R. ;Deckelbaum, Lawrence I. ;G πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 729 KB

Despite expectations that excimer laser ablation would result in a low incidence of coronary dissection, studies have documented a 15-20% incidence of dissection (including a 4-67'0 incidence of clinically significant dissection) during excimer interventions. This investigation sought to determine i

Treatment of oral lichen planus with the
Treatment of oral lichen planus with the 308-nm UVB excimer laserβ€”early preliminary results in eight patients
✍ Katja KΓΆllner; Monika Wimmershoff; Michael Landthaler; Ulrich Hohenleutner πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 82 KB

## Abstract ## Background and Objectives Oral lichen planus (OLP) is a chronic disease of uncertain origin. Many patients with OLP are refractory to all available therapies. The 308‐nm excimer laser was used as a possible additional method in the treatment of OLP. ## Study Design/Materials and Me