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https://www.readbyqxmd.com/read/27897130/recommendations-for-potassium-titanyl-phosphate-laser-in-the-treatment-of-cholesteatoma
#1
REVIEW
Gavin John le Nobel, Adrian Lewis James
Potassium-titanyl-phosphage (KTP) lasers possess many characteristics suitable for otologic surgery. The objective of this report is to provide recommendations on the use of KTP laser for cholesteatoma surgery based on a narrative review of currently available evidence. PubMed and the Cochrane Review of randomized control trials were searched for relevant publications on efficacy and adverse effects and relevant articles appraised by the authors using Oxford Centre for Evidence-based Medicine criteria for recommendations...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27879303/smooth-muscle-tumour-of-uncertain-malignant-potential-smtump-in-the-nasal-cavity-an-incidental-finding
#2
Dipak Ranjan Nayak, Asheesh Dora Ghanpur, Apoorva N Reddy, Swati Sharma
Sino-nasal smooth muscle tumours of uncertain malignant potential (SMTUMP) are very rare neoplasms of mesenchymal origin with features in between a benign leiomyoma and a leiomyosarcoma. We report a rare case of SMTUMP in a 44-year-old woman, who presented with vague symptoms of pharyngitis. Nasal endoscopy revealed a smooth mass in left nasal cavity. Contrast-enhanced CT and MRI scans showed features likely to be inverted papilloma or olfactory neuroblastoma or meningioma. Excision was planned and intraoperatively, frozen section revealed a probable spindle cell lesion...
November 22, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27869377/physical-modalities-for-the-treatment-of-rosacea
#3
Maja A Hofmann, Percy Lehmann
Rosacea is characterised by a wide variety of vascular changes. Apart from telangiectasia and erythema, often so-called flushing occurs. These vascular abnormalities can be targeted with specific light and laser devices. In addition to KTP laser, pulsed dye laser (PDL) and Nd:YAG laser, also intense pulsed light devices (IPLs) are used. The described therapeutic effects include the reduction of vascular abnormalities and even improvement of papulopustular changes. While the KTP laser shows very good results in telangiectasia, the dye laser and IPL devices are used preferably in erythema...
December 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27869376/physikalische-methoden-zur-behandlung-der-rosazea
#4
Maja A Hofmann, Percy Lehmann
Die Rosazea ist durch vielfältige vaskuläre Veränderungen gekennzeichnet. Neben Teleangiektasien und Erythemen treten häufig auch sogenannte "Flushings" auf. Haupteinsatzgebiete von Licht- und Lasersystemen sind diese vaskulären Veränderungen, wie Erytheme und Teleangiektasien. Neben dem KTP-Laser, dem Farbstofflaser (PDL) und dem Nd:YAG-Laser kommen auch Blitzlampen (IPL) zum Einsatz. Neben der Rückbildung der vaskulären Komponente, ist auch eine Verbesserung der papulopustulösen Komponente beschrieben...
December 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27859300/potassium-titanyl-phosphate-laser-welding-following-complete-nerve-transection
#5
Neel K Bhatt, Christopher Mejias, Dorina Kallogjeri, Derrick C Gale, Andrea M Park, Randal C Paniello
OBJECTIVES/HYPOTHESIS: Cranial nerve transection during head and neck surgery is conventionally repaired by microsuture reanastomosis. Laser nerve welding (LNW), using CO2 laser to spot-weld the epineurium of transected nerve endings, has been shown in animal models to be a novel alternative to microsuture repair. This method avoids needle/suture material and minimizes instrumentation of the nerve. We hypothesized that potassium titanyl phosphate (KTP) laser would be superior to CO2 laser in repairing transected nerves...
November 16, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27857335/terahertz-parametric-generation-and-amplification-from-potassium-titanyl-phosphate-in-comparison-with-lithium-niobate-and-lithium-tantalate
#6
Ming-Hsiung Wu, Yu-Chung Chiu, Tsong-Dong Wang, Gang Zhao, Andrius Zukauskas, Fredrik Laurell, Yen-Chieh Huang
We report superior terahertz parametric generation from potassium titanyl phosphate (KTP) over congruent-grown lithium niobate (CLN) and lithium tantalate (CLT) in terms of parametric gain and laser damage resistance. Under the same pump and crystal configurations, the signal emerged first from KTP, 5% Mg-doped CLN, CLN, and then finally from CLT. The signal growth rate in KTP was comparable to that in 5%-Mg-doped CLN, but the signal power from KTP reached a much higher value after all the other crystals were damaged by the pump laser...
November 14, 2016: Optics Express
https://www.readbyqxmd.com/read/27828399/widely-tunable-high-repetition-rate-terahertz-generation-in-gase-with-a-compact-dual-wavelength-ktp-opo-around-2-%C3%AE-m
#7
Jialin Mei, Kai Zhong, Maorong Wang, Yang Liu, Degang Xu, Wei Shi, Yuye Wang, Jianquan Yao, Robert A Norwood, Nasser Peyghambarian
A compact efficient high-repetition-rate doubly-resonant dual-wavelength KTP optical parametric oscillator (OPO), with output power up to 3.65 W and tuning ranges of 2.088-2.133 μm/2.171-2.122 μm for signal/idler waves, was deployed for terahertz (THz) generation in a GaSe crystal. Based on difference frequency generation (DFG), the THz wave was continuously tunable from 730.9 μm (0.41 THz) to 80.8 μm (3.71 THz), believed to be the first report of a compact high-repetition-rate widely-tunable THz source...
October 3, 2016: Optics Express
https://www.readbyqxmd.com/read/27827498/control-of-clustering-behavior-in-anionic-cerium-iii-corrole-complexes-from-oligomers-to-monomers
#8
Keith C Armstrong, Stephan Hohloch, Trevor D Lohrey, Ryan A Zarkesh, John Arnold, Mitchell R Anstey
The first synthesis of anion capped cerium corrole complexes is reported. Unusual clustering of the lanthanide corrole units has been found and the degree of aggregation can be controlled by the choice of the capping ligand. A polymeric structure 1a, with the general formula [Cor-Ce(THF)-Cp-Na]n (Cor = 5,15-bis(2,4,6-trimethylphenyl)-10-(4 methoxyphenyl)-corrole, THF = tetrahydrofuran), is formed using sodium cyclopentadienide (NaCp) and a dimeric structure 2a, with the general formula [Cor-Ce-Tp]2, is formed when potassium tris(pyrazolyl)borate (KTp) is used...
November 22, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27823669/an-effective-microfluidic-based-liquid-phase-microextraction-device-%C3%AE-lpme-for-extraction-of-non-steroidal-anti-inflammatory-drugs-from-biological-and-environmental-samples
#9
María Ramos-Payan, Santiago Maspoch, Andreu Llobera
In this work, the traditional liquid phase microextraction (LPME) has been miniaturized into a microfluidic device (μLPME) where liquid phase microextraction is combined with an HPLC procedure. This integration enables extraction and determination of acid drugs by μLPME and HPLC, respectively. The analytes selected for the test are five widely used non-steroidal anti-inflammatory drugs (NSAIDs): salicylic acid (SAC), ketoprofen (KTP), naproxen (NAX), diclofenac (DIC) and ibuprofen (IBU). They have successfully been detected in biological (urine and saliva) and environmental (lake and river water) samples with excellent clean up, high extraction efficiency and good enrichment factor under stopped-flow conditions...
November 23, 2016: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27805703/gaussian-entanglement-distribution-with-gigahertz-bandwidth
#10
Stefan Ast, Melanie Ast, Moritz Mehmet, Roman Schnabel
The distribution of entanglement with Gaussian statistic can be used to generate a mathematically proven secure key for quantum cryptography. The distributed secret key rate is limited by the entanglement strength, the entanglement bandwidth, and the bandwidth of the photoelectric detectors. The development of a source for strongly bipartite entangled light with high bandwidth promises an increased measurement speed and a linear boost in the secure data rate. Here, we present the experimental realization of a Gaussian entanglement source with a bandwidth of more than 1...
November 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27784692/a-kidney-selective-biopolymer-for-targeted-drug-delivery
#11
Gene L Bidwell, Fakhri Mahdi, Qingmei Shao, Omar C Logue, Jamarius P Waller, Caleb Reese, Alejandro R Chade
Improving drug delivery to the kidney using renal-targeted therapeutics is a promising but under-developed area. We aimed to develop a kidney-targeting construct for renal-specific drug delivery. Elastin-like polypeptides (ELPs) are non-immunogenic protein-based carriers that can stabilize attached small molecule and peptide therapeutics. We modified ELP at its N-terminus with a cyclic, seven amino acid kidney-targeting peptide (KTP) and at its C-terminus with a cysteine residue for tracer conjugation. Comparative in vivo pharmacokinetics and biodistribution in rat and swine models and in vitro cell binding studies using human renal cells were performed...
October 26, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27733711/morphological-and-histological-effects-of-radiofrequency-and-laser-ktp-and-nd-yag-treatment-of-the-inferior-turbinates-in-animals-a-comparative-pilot-study
#12
Krisztina Somogyári, Péter Móricz, Imre Gerlinger, László Kereskai, István Szanyi, Ildikó Takács
The aim of this study was to evaluate the short and medium-term effects of radiofrequency (RF) and potassium titanyl phosphate (KTP) and neodymium-yttrium-aluminum garnet (Nd:YAG) laser treatment on the inferior turbinate mucosa in a porcine model. Following randomization, the inferior turbinates were treated either with RF submucosally or with the KTP or the Nd:YAG laser on the surface under videoendoscopic control. Tissue samples were taken at the end of postoperative weeks 1 and 6, and were evaluated macroscopically and histopathologically...
October 11, 2016: Surgical Innovation
https://www.readbyqxmd.com/read/27733065/photoselective-vaporization-of-the-prostate-long-term-outcomes-and-safety-during-10-years-of-follow-up
#13
Yasushi Yamada, Jun Furusawa, Yoshiki Sugimura, Isao Kuromatsu
PURPOSE: To evaluate the long-term outcomes and safety photoselective vaporization of the prostate (PVP). PATIENTS AND METHODS: From April 2005 to December 2015, a total of 1154 patients with benign prostatic hyperplasia underwent PVP. The type of Green Light laser was an 80 W potassium-titanyl-phosphate laser and later a 120 W lithium triborate laser. Before and after surgery, the International Prostate Symptom Score (IPSS), maximum urinary flow rate (Qmax), post-voiding volume of residual urine (PVR), prostate-specific antigen (PSA) level, and prostate volume were assessed regularly...
December 2016: Journal of Endourology
https://www.readbyqxmd.com/read/27605491/prospective-randomized-evaluator-blinded-study-of-the-long-pulse-532-nm-ktp-laser-alone-or-in-combination-with-the-long-pulse-1064-nm-nd-yag-laser-on-facial-rejuvenation-in-asian-skin
#14
Kei Negishi, Shiho Tanaka, Saori Tobita
BACKGROUND AND OBJECTIVE: Hyperpigmentation is a common concern in Asian patients. Few published studies address overall skin rejuvenation in this group using long-pulse (LP) laser to target pigmentation and stimulate dermal remodeling. The LP KTP 532-nm laser (LP 532-nm) is used primarily to remove epidermal lesions, while the LP Nd: YAG 1064-nm laser (LP 1064-nm) is used to stimulate dermal remodeling in Asian patients with varying efficacy. The LP 532-nm used alone and in combination with LP 1064-nm to reduce pigmentation and rejuvenate skin was previously evaluated in lighter skin, but not in Asian skin...
November 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27592468/modeling-the-fate-of-a-photoproduct-of-ketoprofen-in-urban-rivers-receiving-wastewater-treatment-plant-effluent
#15
Seiya Hanamoto, Eisuke Hasegawa, Norihide Nakada, Naoyuki Yamashita, Hiroaki Tanaka
Photoproducts of pharmaceuticals have been studied in order not to overlook their potential risks to aquatic organisms. However, no studies have verified an equation for predicting the fate of photoproducts in aquatic environment (Poiger equation) by field measurements, leaving uncertainties in its practical utility. Therefore, we conducted this study to test the applicability of the Poiger equation to 3-ethylbenzophenone (EBP), a photoproduct of ketoprofen (KTP). Photolysis experiments determined the fraction of KTP transformed into EBP as 0...
December 15, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27557240/domain-engineering-algorithm-for-practical-and-effective-photon-sources
#16
J-L Tambasco, A Boes, L G Helt, M J Steel, A Mitchell
We introduce a method for shaping the spectral response of nonlinear light sources by tailoring the quasi-phase matching. Our algorithm relies on engineering the poling to accurately trace a generated target signal field amplitude to determine the desired nonlinearity profile. The proposed poling algorithm results in a poling pattern that is more robust to manufacture, as all domain inversions are of equal width. The poling pattern is verified using a nonlinear beam propagation method simulation. This approach is applied to achieve Gaussian-shaped phase matching along a potassium titanyl phosphate (KTP) crystal in order to generate pure heralded single photons of spectral purity ~0...
August 22, 2016: Optics Express
https://www.readbyqxmd.com/read/27499101/use-of-potassium-titanyl-phosphate-ktp-laser-dermastat-in-the-treatment-of-recurrent-anterior-epistaxis-a-new-technique
#17
A Jain, S J Frampton, R Sachidananda, P K Jain
OBJECTIVE: To evaluate the short- to medium-term effectiveness of potassium titanyl phosphate (KTP) laser Dermastat in patients with recurrent anterior epistaxis. METHOD: Fifty-eight patients presenting with recurrent anterior epistaxis were treated using potassium titanyl phosphate laser Dermastat. Those with recurrent epistaxis arising from prominent vessels in Little's area, and/or those for whom treatment with silver nitrate cautery failed, were included. The main outcome measure was resolution of epistaxis at two months...
September 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27472638/high-power-and-high-sfdr-frequency-conversion-using-sum-frequency-generation-in-ktp-waveguides
#18
Russell J Barbour, Tyler Brewer, Zeb W Barber
We characterize the intermodulation distortion of high power and efficient frequency conversion of modulated optical signals based on sum frequency generation (SFG) in a periodically poled potassium titanyl phosphate (KTP) waveguide. Unwanted frequency two-tone spurs are generated near the converted signal via a three-step cascaded three-wave mixing process. Computer simulations describing the process are presented along with the experimental measurements. High-conversion efficiencies and large spur-free dynamic range of the converted optical signal are demonstrated...
August 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27435457/office-based-532-nanometer-pulsed-potassium-titanyl-phosphate-laser-for-marsupialization-of-laryngeal-and-vallecular-mucoceles
#19
Samuel N Helman, Michael J Pitman
OBJECTIVES/HYPOTHESIS: Many laryngopharyngeal disorders are effectively managed in the office. Herein, an in-office method utilizing the 532-nm potassium-titanyl-phosphate (KTP) laser for the treatment of benign laryngeal and vallecular mucoceles is described. STUDY DESIGN: Retrospective case review. METHODS: A review was performed of patients who had their vallecular or laryngeal mucoceles marsupialized in the office using KTP laser. RESULTS: Outcomes included long-term follow-up laryngoscopy for evidence of recurrence, significant intraprocedural complications, tolerance of the procedure, final pathology of the specimen, and resolution of symptoms...
July 20, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27428359/bifseo3-an-excellent-shg-material-designed-by-aliovalent-substitution
#20
Ming-Li Liang, Chun-Li Hu, Fang Kong, Jiang-Gao Mao
The first bismuth selenite fluoride, BiFSeO3, was obtained by aliovalent substitution of 2D BiOIO3. Its structure features a 3D network composed of 1D [BiF](2+) chains interconnected by SeO3 groups. BiFSeO3 exhibits a very strong second harmonic generation (SHG) effect of about 13.5 times that of KH2PO4 (KDP) under 1064 nm laser radiation and 1.1 times that of KTiOPO4 (KTP) under 2.05 μm laser radiation, which is the highest among all of the metal selenites reported. It has also very simple chemical composition and can be synthesized easily under mild hydrothermal conditions...
August 3, 2016: Journal of the American Chemical Society
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