No abstract available.
Neodymium* ; Onychomycosis* ; Pilot Projects*

Neodymium YAG (Nd-YAG) laser is a new instrument for the treatment of various urologic disorders where coagulation is necessary but still limited in cases. It avoids many of the side effects of electrocoagulations. Nd.YAG Iaser is a safe and effective modality, reducing blood loss, shortening operation time and preserving functional integrity on remaining renal tissue. In this experiment, to investigate the Nd-YAG Laser effect to renal tissue and the adaptation to renal surgery were aimed. We made the experimental study on renal tissue damage according to the change of irradiation time and power of NJ-YAG laser. The following results were obtained; After irradiation of Nd-YAG laser, renal tissue damage was noted on 30 Watt, 3 seconds and 5O Watt, 1 second, and the degree of renal tissue damage was increased with in creasing of laser power and time. A 2mm depth injured renal tissue was noted on 150-250 Joules, which coagulates the vessel with several mm diameter. Judging from the results of this experiment it may be believed that Nd-YAG laser can be adaptable to renal surgery in bleeding control without severe renal tissue damage.
Hemorrhage ; Lasers, Solid-State ; Neodymium

No abstract available.
Aluminum* ; Animals ; Horns* ; Lasers, Solid-State ; Neodymium* ; Welding ; Yttrium*

PURPOSE: To compare contrast sensitivity (CS) in type and degree of posterior capsule opacification (PCO) in pseudophakic eyes before and after neodymium: YAG capsulotomy. METHODS: Nine eyes with fibrosis-type PCO and 26 with Elschnig-pearl type PCO were examined for best corrected visual acuity (BCVA) and CS before and 1 week after capsulotomy. CS was tested with visual capacity analyzer (ACV) which uses a Landolt ring of 5 different spatial frequencies (SF) under two different conditions of day (100cd/m2) and night (30cd/m2). The patients were divided into two groups based on the BCVA before capsulotomy: Group A, 4 eyes and 18 eyes with below 0.63 in fibrosis-type and pearls-type PCO, respectively; Group B, 5 eyes and 8 eyes with above 0.63 in fibrosis-type and pearls-type PCO, respectively. RESULTS: The patients with PCO had worse BCVA and CS, but these were improved by Nd: YAG capsulotomy. This was not affected by the types and degrees of PCO. In the daytime condition, CS of B group was worse at all SF in patients with pearl-type PCO than in those with fibrosis-type PCO before capsulotomy, except 19 cpd (p<0.05). In the nighttime condition, CS in the two groups showed no difference at all SF (p>0.05). CONCLUSIONS: In the daytime condition, the patients with pearls-type PCO of relatively poor BCVA had lower CS than those with fibrosis-type PCO.
Capsule Opacification ; Contrast Sensitivity* ; Humans ; Neodymium ; Visual Acuity

Punctate leukoderma presents as numerous, distinct, round or oval depigmented spots. Recently, laser therapy-induced punctate leukoderma associated with various Q-switched laser and carbon dioxide laser have been reported. A 25-year-old man presented with numerous, discrete, round, confetti-like, depigmented macules on his left neck. He had undergone 3 sessions of 532-nm Q-switched Neodymium: Yttrium-Aluminum-Garnet laser treatment for café-au-lait macules three years ago. After the last laser treatment session, the punctate leukoderma had been developed. We started treatment with the 308-nm excimer laser twice a week. After 7 months of treatment duration, complete repigmentation was achieved without serious adverse effects. We recommend the 308-nm excimer laser as an effective treatment modality for laser therapy-induced punctate leukoderma.
Adult ; Humans ; Hypopigmentation ; Lasers, Excimer* ; Lasers, Gas ; Neck ; Neodymium ; Vitiligo

BACKGROUND: Rosacea treatments including oral/topical medications and laser therapy are numerous but unsatisfactory. OBJECTIVE: To compare the effectiveness of the dual wavelength long-pulsed 755-nm alexandrite/1,064-nm neodymium: yttrium-aluminum-garnet laser (LPAN) with that of 585-nm pulsed dye laser (PDL) for rosacea. METHODS: This was a randomized, single-blinded, comparative study. Full face received four consecutive monthly treatments with LPAN or PDL, followed-up for 6 months after the last treatment. Erythema index was measured by spectrophotometer, and digital photographs were evaluated by consultant dermatologists for physician's global assessment. Subjective satisfaction surveys and adverse effects were recorded. RESULTS: Forty-nine subjects with rosacea enrolled and 12 dropped out. There were no significant differences between LPAN and PDL in the mean reduction of the erythema index (p=0.812; 3.6% vs. 2.8%), improvement of physician's global assessment (p=1.000; 88.9% vs. 89.5%), and subject-rated treatment satisfaction (p=0.842; 77.8% vs. 84.2%). PDL showed more adverse effects including vesicles than LPAN (p=0.046; 26.3% vs. 0.0%). No other serious or permanent adverse events were observed in both treatments. CONCLUSION: Both LPAN and PDL may be effective and safe treatments for rosacea.
Consultants ; Erythema ; Humans ; Laser Therapy ; Lasers, Dye* ; Neodymium ; Prospective Studies* ; Rosacea*

Intraocular pressures (IOP)were measured following Neodymium (Nd): YAG laser posterior capsulotomy in 51 pseudophakic eyes which had been treated with phacoemulsification and intraocular lens in the bag.Group 1 was no medical treated, group 2 was treated with 0.5%apraclonidine preoperatively, group 3 was treated with fluorometholone postoperatively, and group 4 was treated with 0.5%apraclonidine preoperatively and with fluorometholone postoperatively.IOP was measured preoperatively and 1, 3, 24 hours and 1 week postoperatively.Four eyes (7.8%)had greater than 5 mmHg elevation of IOP (1 eye in group 1, 3 eyes in group 3)and all of them decreased IOP to normal level within 3 hours.In summary, there was no or little IOP elevation without any medical treatment in eyes which had been treated with phacoemulsification and intraocular lens in the bag and had intact posterior lens capsule.
Cataract* ; Fluorometholone ; Intraocular Pressure* ; Lasers, Solid-State* ; Lenses, Intraocular ; Neodymium ; Phacoemulsification ; Posterior Capsulotomy*

PURPOSE: To treat pupillary membrane which developed after cataract operation and vitrectomy,steroid eye drops with mydriatics or, in sever case, tPA has been used. However steroid eye drops needs prolonged treatment and tPA has many complications such as, infection, or hemorrhage. We tried to remove pupillary membrane with Nd-YAG laser by using peripheral quadrantic disruption technique. METHODS: We treated 8 eyes from Jan. 1996 to Oct. 1999, and observed within 24 hours following Nd-YAG laser treatment. The pupillary membrane was cut with Nd-YAG laser and subsequently absorbed within 24 hours. RESULTS: There was no such complicaitons, as increased IOP, hemorrhage, and IOL damage. Immediately after Nd-YAG laser, visual acuity was improved and fundus was examined. CONCLUSION: Therefore we recommend Nd-YAG laser membrenectomy in cases of pupillary membrane, which did not respond to steroid therapy.
Cataract ; Hemorrhage ; Lasers, Solid-State* ; Membranes* ; Mydriatics ; Neodymium* ; Ophthalmic Solutions ; Visual Acuity

This review discusses an underestimated risk of rare-earthmagnet (henceforth, magnet) ingestion in children and its surgical indication. Due to the ubiquity of magnets, the incidence of magnet ingestion has rapidly increased. While most foreign body ingestions show spontaneous passage, multiple magnet ingestion requires surgery in 30%-70% of the cases. Multiple magnets can attract each other across the bowel wall, leading to pressure necrosis, and subsequently, fistula, perforation, obstruction or volvulus. After recognizing magnet ingestion, the number of magnets should be checked using radiographs. In case of multiple magnet ingestion, surgery should be promptly considered.
Child* ; Eating* ; Fistula ; Foreign Bodies ; Gastrointestinal Tract ; Humans ; Incidence ; Intestinal Volvulus ; Necrosis ; Neodymium

PURPOSE: The solid-state, continuous-wave, frequency-doubled neodymium:yttrium-aluminum-garnet (Nd:YAG) laser pumped by diode laser has several advantages, including air cooling, higher electrical to optical efficiency ratios, and portability. The authors evaluated the use of the frequency-doubled Nd:YAG laser for peripheral iridotomy and compared with the argon blue-green laser. METHODS: Laser peripheral iridotomy was performed on 64 eyes of 47 patients with acute or chronic primary angle-closure glaucoma and narrow angles capable of closure. Thirty-one eyes of 25 patients were treated with frequency-doubled Nd:YAG laser and 33 eyes of 22 patients were treated with argon laser. Postoperative intraocular pressure, visual acuity, preoperative and postoperative medication, number of laser spots, and failure of patency were compared. RESULTS: Postlaser 1hr intraocular pressure elevation greater than 10 mmHg 1hr was seen in one (3.2%) of frequency-doubled Nd:YAG laser treated eyes and six (17.6%) of argon laser-treated eyes (p=0.055). The failure of patency was seen less often in frequency-doubled Nd:YAG laser than in argon laser (9.7% vs 27.3%, p=0.081). The number of laser spots was greater in frequency-doubled Nd:YAG laser than in argon laser (p=0.069). Preoperative, postoperative 1hr, 1day, 1mon, 3mons intraocular pressure, visual acuity, preoperative and postoperative antiglaucomatous medication, number of laser spots, and failure of patency were similar in the two groups. CONCLUSIONS: The above results suggest that the frequency-doubled Nd:YAG laser was at least as effective and appears to be as safe as the argon laser. However, laser iridotomy with frequency-doubled Nd:YAG laser may be more difficult than the argon laser.
Argon* ; Glaucoma, Angle-Closure ; Humans ; Intraocular Pressure ; Lasers, Semiconductor ; Lasers, Solid-State* ; Neodymium* ; Visual Acuity