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https://www.readbyqxmd.com/read/29737897/successful-treatment-of-intravenous-drug-use-related-pigmentation-with-q-switched-alexandrite-laser-a-case-report-of-two-patients
#1
Stephen Akihiro Wirya, Neelam A Vashi
Patients with a history of intravenous drug usage (IVDU) often develop pathognomonic linear hyperpigmented dermatoses near injection sites. This drug use-related pigmentation can be very distressing for patients as they persist for life, are very difficult to treat, and remain a constant reminder of prior drug usage. The difficulty of treatment is due to the location of the deposited material and its exogenous nature. This article reports two cases of linear hyperpigmentation due to IVDU successfully treated using the Q-switched Alexandrite laser...
May 8, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29732522/a-split-face-study-comparison-of-picosecond-alexandrite-laser-and-q-switched-nd-yag-laser-in-the-treatment-of-melasma-in-asians
#2
Mei-Ching Lee, Ying-Fang Lin, Sindy Hu, Yau-Li Huang, Shyue-Luen Chang, Chun-Yu Cheng, Chun-Shin Chang
To evaluate efficacy and safety of picosecond 755 nm alexandrite laser as compared to 1064 nm QS-Nd:YAG laser for melasma treatment in Asians. Twelve patients received 4 sessions of treatments at 1-month interval in a split-face manner. The right side of each patient's face received 755 nm picosecond laser, and the other side received 1064 nm QS-Nd:YAG laser. Zoom handpiece of 755 nm picosecond laser at fluence of 0.88-1.18 J/cm2 was applied. The treatment protocol used for 1064 nm QS-Nd:YAG laser was 8 mm spot size at fluence of 2...
May 7, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29609327/temperature-effects-on-tunable-cw-alexandrite-lasers-under-diode-end-pumping
#3
William R Kerridge-Johns, Michael J Damzen
Diode pumped Alexandrite is a promising route to high power, efficient and inexpensive lasers with a broad (701 nm to 858 nm) gain bandwidth; however, there are challenges with its complex laser dynamics. We present an analytical model applied to experimental red diode end-pumped Alexandrite lasers, which enabled a record 54 % slope efficiency with an output power of 1.2 W. A record lowest lasing wavelength (714 nm) and record tuning range (104 nm) was obtained by optimising the crystal temperature between 8 °C and 105 °C in the vibronic mode...
March 19, 2018: Optics Express
https://www.readbyqxmd.com/read/29543280/70-femtosecond-kerr-lens-mode-locked-multipass-cavity-alexandrite-laser
#4
Can Cihan, Abdullah Muti, Isinsu Baylam, Askin Kocabas, Umit Demirbas, Alphan Sennaroglu
We report, to the best of our knowledge, the shortest femtosecond pulses generated from a Kerr-lens mode-locked (KLM) Alexandrite laser operating near 750 nm. The Alexandrite gain medium was pumped with a continuous-wave (cw), 532 nm laser, and the performance of both the short and extended resonators was investigated. The use of an extended cavity eliminated the multi-wavelength spectral instabilities observed during the cw operation of the short cavity. Furthermore, since the repetition rate of the Alexandrite laser was reduced from 107 to 5...
March 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29488808/comparison-of-treatment-with-an-alexandrite-picosecond-laser-and-nd-yag-nanosecond-laser-for-removing-blue-black-chinese-eyeliner-tattoos
#5
Mengli Zhang, Yuqing Huang, Tong Lin, Qiuju Wu
OBJECTIVE: To retrospectively evaluate the efficacy of an Alexandrite picosecond laser versus Nd:YAG nanosecond laser for removing blue-black eyeliner tattoos which have existed more than 10 years. METHODS: A total of 40 patients were treated with an Alexandrite picosecond laser in our department from August 2015 to July 2017, with a fluence of 1.96-6.37J/cm2 , spot size of 2.0-3.6 mm, and pulse width of 750 ps. Another 32 patients were treated with an Nd:YAG nanosecond laser, with a fluence of 2...
February 28, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29423841/treatment-of-flat-and-elevated-pigmented-disorders-with-a-755-nm-alexandrite-picosecond-laser-clinical-and-histological-evaluation
#6
Adrian Alegre-Sanchez, Natalia Jiménez-Gómez, Óscar M Moreno-Arrones, Pablo Fonda-Pascual, Bibiana Pérez-García, Pedro Jaén-Olasolo, Pablo Boixeda
The novel picosecond lasers, initially developed for faster tattoo removal, have also shown great efficacy in endogenous pigmentary disorders. To describe the efficacy and safety profile of an alexandrite (755-nm) picosecond laser in a wide range of pigmented flat and elevated cutaneous lesions. A retrospective study was performed in which we collected all the clinical images of patients treated with the 755-nm alexandrite picosecond laser for 12 months (November 2016-November 2017). Clinical features were obtained from their medical charts...
February 9, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29400580/picosecond-alexandrite-laser-is-superior-to-q-switched-nd-yag-laser-in-treatment-of-minocycline-induced-hyperpigmentation-a-case-study-and-review-of-the-literature
#7
Tom Barrett, Sally de Zwaan
Minocycline is a commonly prescribed tetracycline antibiotic used for the treatment of a number of dermatological conditions including acne and rosacea. Long-term adverse effects of minocycline include cutaneous hyperpigmentation. Various treatment options have been suggested for the treatment of minocycline pigmentation. We report a case of a patient on long-term low-dose minocycline for the treatment of rosacea with type III minocycline hyperpigmentation. A comparison was made between Q-Switch Nd:YAG and picosecond laser over a nine 9-period with treatments spaced 1 month apart, with a clearance in the patient pigmentation after four treatments with picosecond laser...
February 5, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29379862/removal-of-forearm-lentigines-in-dyschromatosis-universalis-hereditaria-with-a-755-nm-q-switched-alexandrite-laser
#8
Yiming Li, Li Li
No abstract text is available yet for this article.
January 2018: JAAD Case Reports
https://www.readbyqxmd.com/read/29356124/picosecond-alexandrite-laser-for-naevus-of-ota-treatment-in-chinese
#9
LETTER
L Peng, Y Yang, Y P Ge, T Lin
No abstract text is available yet for this article.
January 22, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29328247/femtosecond-alexandrite-laser-passively-mode-locked-by-an-inp-ingap-quantum-dot-saturable-absorber
#10
Shirin Ghanbari, Ksenia A Fedorova, Andrey B Krysa, Edik U Rafailov, Arkady Major
An Alexandrite laser passively mode-locked using an InP/InGaP quantum-dot semiconductor saturable absorber mirror (QD-SESAM) was demonstrated. The laser was pumped at 532 nm and generated pulses as short as 380 fs at 775 nm with an average output power of 295 mW. To the best of our knowledge, this is the first report on a passively mode-locked femtosecond Alexandrite laser using a SESAM in general and a QD-SESAM in particular.
January 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29291276/a-hairy-situation-laser-hair-removal-after-oral-reconstruction
#11
Bridget E Shields, Molly S Moye, Rodrigo Bayon, Steven M Sperry, Karolyn A Wanat
OBJECTIVES: To present a case series of 4 patients who underwent postoperative hair removal using the long-pulsed Alexandrite or Nd:YAG laser following intraoral cutaneous flap reconstruction. METHODS: Patients underwent epilation in dermatology clinic with long-pulsed Alexandrite or Nd:YAG lasers, spaced 8 weeks apart, until hair removal was achieved. RESULTS: All patients achieved improvement in hair removal regardless of initial flap donor site with significant improvement in quality of life and minimal side effects...
March 2018: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29288102/a-split-face-single-blinded-randomized-controlled-comparison-of-alexandrite-755-nm-picosecond-laser-versus-alexandrite-755-nm-nanosecond-laser-in-the-treatment-of-acquired-bilateral-nevus-of-ota-like-macules
#12
Wenyou Yu, Jiafang Zhu, Wenxin Yu, Dongze Lyu, Xiaoxi Lin, Zhen Zhang
BACKGROUND: Q-switched alexandrite lasers (QSALs) have been used for the treatment of acquired bilateral nevus of Ota-like macules (ABNOMs). Currently, picosecond alexandrite laser (PSAL) pulses have become available for pigmentary disorders. However, no studies have compared PSAL and QSAL in the treatment of ABNOM. OBJECTIVE: We sought to compare the efficacy and safety of PSAL and QSAL in the treatment of ABNOM. METHODS: Each patient (n = 30) received 3 treatments at 6-month intervals...
December 27, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29200769/treatment-of-melasma-and-post-inflammatory-hyperpigmentation-by-a-picosecond-755-nm-alexandrite-laser-in-asian-patients
#13
Ye Jin Lee, Ho Jeong Shin, Tai-Kyung Noh, Kwang-Ho Choi, Sung-Eun Chang
The picosecond lasers have shown to effectively treat tattoo pigments that are intractable to previous multiple Q-switched (QS) laser treatments. Therefore we hypothesized that a picosecond laser would show better efficacy with minimal adverse events in the treatment of melasma and post-inflammatory hyperpigmentation (PIH) that are difficult to treat with conventional QS lasers. Two patients with melasma and one patient with PIH were treated with a Picosecond 755-nm Alexandrite Laser (Cyanosure, USA). All patients were Korean with skin type IV and no longer responding to QS laser treatments...
December 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/29140537/using-normal-and-high-pulse-coverage-with-picosecond-laser-treatment-of-wrinkles-and-acne-scarring-long-term-clinical-observations
#14
Christine Dierickx
OBJECTIVE: The picosecond 755 nm alexandrite laser using a diffractive lens array has demonstrated consistent clinical efficacy for improving the appearance of acne scarring and wrinkles amongst other benefits. This small pilot study is to assess the difference, if any, in clinical benefit if a higher than the standard protocol for number of pulses delivered to a tissue area is used compared to the standard protocol guidelines. METHOD: Seven subjects received treatment to one side of the face with a standard protocol number of laser pulses with the other side of the face receiving higher than standard number of pulses from the same 755 nm picosecond laser using an additional diffractive lens array...
January 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29135036/prospective-studies-of-the-efficacy-and-safety-of-the-picosecond-755-1-064-and-532-nm-lasers-for-the-treatment-of-infraorbital-dark-circles
#15
Monique J Vanaman Wilson, Isabela T Jones, Joanna Bolton, Lisa Larsen, Douglas C Wu, Mitchel P Goldman
BACKGROUND: Infraorbital dark circles result from a combination of factors. The fractionated picosecond 755 nm alexandrite laser and dual wavelength picosecond Nd:YAG laser have not been examined as a method of addressing infraorbital hyperpigmentation. OBJECTIVE: To determine the efficacy and safety of treatment of infraorbital dark circles using fractionated picosecond 755 nm and dual wavelength picosecond Nd:YAG laser. METHODS AND MATERIALS: These trials did not utilize a comparative design; rather, these were separate, prospective, open-label, evaluator-blinded trials utilizing two treatment regimens: (i) 19 adult subjects were treated in a single session with the dual wavelengths of 532 nm and 1,064 nm in consecutive passes using the fractionated lens; (ii) 10 adult subjects were treated using the picosecond 755 nm laser via the fractionated lens in three treatment sessions at 3 week intervals...
January 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29111604/a-comparative-study-with-a-755-nm-picosecond-alexandrite-laser-with-a-diffractive-lens-array-and-a-532-nm-1064-nm-nd-yag-with-a-holographic-optic
#16
Emil Tanghetti Md, John Jennings
BACKGROUND AND OBJECTIVES: This study was performed to better understand the cutaneous effects of using a fractional picosecond laser at 755 nm with a diffractive lens array and a picosecond Nd:YAG laser at 532 mn and 1064 nm with a holographic optic. We characterized the injuries created by these devices on skin clinically and histologically over 24 hours. With this information we modeled the effects of these devices on a cutaneous target. METHODS: Eight patients, representing Fitzpatrick skin types I-VI, were treated on their backs with a picosecond Alexandrite laser with a diffractive lens array, as well as a picosecond Nd:YAG laser at 532 nm and 1064 nm with a holographic optic...
January 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29028045/led-pumped-alexandrite-laser-oscillator-and-amplifier
#17
Pierre Pichon, Adrien Barbet, Jean-Philippe Blanchot, Frédéric Druon, François Balembois, Patrick Georges
Taking advantage of light-emitting-diode (LED) performance breakthrough driven by the lighting market, we report, to the best of our knowledge, the first LED-pumped chromium-doped crystal laser oscillator and amplifier based on alexandrite crystals (Cr3+ :BeAl2 O4 ). We developed a Ce:YAG concentrator as the pumped source, illuminated by blue LEDs that can be easily power scaled. With 2200 LEDs (450 nm), the Ce:YAG concentrator can deliver to the gain medium up to 268 mJ at 10 Hz at 550 nm with a irradiance of 8...
October 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29020484/long-term-outcome-of-a-patient-with-paradoxical-hypertrichosis-after-laser-epilation
#18
Adam Honeybrook, Tascha Crossing, Eric Bernstein, Jason Bloom, Julie Woodward
One underreported, rare side effect of laser hair removal is paradoxical hypertrichosis. It is largely unknown what the long-term outcomes are of patients who develop this complication. We report a 21-year-old, Fitzpatrick II, male patient, who had patchy areas of dark hair affecting various body areas. An Alexandrite 755 nm laser was used to address the desired areas at energies between 20 and 22 J/cm2 at 10-12-week intervals over a course of seven treatments. After three treatments, the patient noted a significant increase in the density and length of hairs involving the back, shoulders, neck, and upper arms...
October 11, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29020474/laser-assisted-hair-removal-for-facial-hirsutism-in-women-a-review-of-evidence
#19
Chun-Man Lee
Poly cystic ovarian syndrome (PCOS) has been described as the common diagnosis for hirsutism in women. Facial hirsutism is by far the most distressing symptom of hyperandrogenism in women with PCOS. A statistically significant improvement in psychological well-being has been reported in patients with PCOS allocated for laser-assisted hair removal. The theory of selective photothermolysis has revolutionized laser hair removal in that it is effective and safe, when operated by sufficiently trained and experienced professionals...
October 11, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29016541/a-novel-treatment-of-acne-keloidalis-nuchae-by-long-pulsed-alexandrite-laser
#20
Abeer Tawfik, Mai Abdelraouf Osman, Iman Rashwan
BACKGROUND: Acne keloidalis nuchae (AKN) is a dermatological condition characterized by follicular-based papules and pustules that later form hypertrophic or keloid-like scars. Laser-assisted hair reduction such as 810-nm diode laser and 1,064-nm Nd:YAG laser have been used for treating AKN with promising results. OBJECTIVE: To evaluate the therapeutic effect and safety of alexandrite laser in the treatment of different lesions of AKN. METHODS: Seventeen male patients with AKN received 6 sessions of 755-nm alexandrite laser...
March 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
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