Abstract:
BACKGROUND AND OBJECTIVE:Lines of radiofrequency ablation for cure of atrial fibrillation are broad, and the consequent loss of atrial mass may impair atrial function and contribute to the risk of stroke. We studied whether Nd:YAG laser could produce deep but narrower lesions. STUDY DESIGN/MATERIALS AND METHODS:Laser lesions were made in ventricular myocardium of nonperfused ovine hearts and at thoracotomy in dogs. RESULTS:Lesions were well demarcated, deep, and narrow. Saline irrigation prevented crater formation for energy levels below 200 J. Lesion depth increased with increasing duration of ablation (maximum 5.3 +/- 0.8mm, P < 0.01). The depth to width ratio was >1 in all cases (maximum 2.5 +/- 1.6). The narrowest lesions were made by using high power, short duration of exposure, and intermittent delivery. CONCLUSIONS:Irrigated Nd:YAG laser can be used to make deep narrow myocardial lesions without crater formation. Laser ablation may be more suitable than radiofrequency ablation for intraoperative or catheter-based cure of atrial fibrillation.
journal_name
Lasers Surg Medjournal_title
Lasers in surgery and medicineauthors
Thomas SP,Guy DJ,Rees A,Collins L,Ross DLdoi
10.1002/lsm.1065subject
Has Abstractpub_date
2001-01-01 00:00:00pages
375-80issue
4eissn
0196-8092issn
1096-9101journal_volume
28pub_type
杂志文章abstract::This canine study (n = 6) evaluated the acute and chronic effects of Nd:YAG laser prostatectomy using a Prolase II fiber. The Prolase II device consists of a 1,000 microns quartz fiber which directs a cone of Nd:YAG laser energy, at 45 degrees to the axis of the fiber, into the prostatic urethra under direct visual gu...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900150304
更新日期:1994-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:In laser retinal photocoagulation, hundreds of dot-like burns are applied. We introduce a robot-assisted technique to enhance the accuracy and reduce the tedium of the procedure. MATERIALS AND METHODS:Laser burn locations are overlaid on preoperative retinal images using common patterns such a...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.20897
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:There is an increasing interest in treating vascular lesions with a long-pulse Alexandrite laser. However, it is difficult to search information in the literature about infantile hemangiomas (IH) treated with long-pulse Alexandrite laser. This article aims to determine whether 755 nm long-pulse...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.22221
更新日期:2014-03-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Enzyme histochemical stains of frozen sections have been used by investigators to assess thermal damage. The assessment of thermal damage to cells in lipid-rich tissues such as subcutaneous tissue and sebaceous glands can be difficult due to the quality of frozen sections of such tissues. The p...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.20450
更新日期:2007-02-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:Keloids have been treated with flashlamp pulsed dye lasers (PDLs) with good results. We investigated whether PDL treatments induced keloid regression by decreasing growth factor-beta(1) (TGF-beta(1)) induction, thereby reducing fibroblast proliferation and collagen deposition. STUDY DESIGN/MA...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.10206
更新日期:2004-01-01 00:00:00
abstract::Hyperthermia induced by a microwave source (2,450 MHz) was used alone and in combination with photodynamic therapy (PDT) to treat the SMT-F, EMT-6, and RIF animal tumors in vivo. PDT was administered using either Photofrin I or II as the photosensitizer and an argon-pumped tunable dye laser (630 nm) as the light sourc...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900070104
更新日期:1987-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Some oral bacteria are susceptible to killing by red light after their sensitization with toluidine blue O (TBO). The photochemotherapy of periodontal disease in vivo would require a therapeutic window where bacteria could be killed without adjacent normal tissue damage. STUDY DESIGN/MATERIALS...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/(SICI)1096-9101(1996)18:3<253::AID-LSM6>3.
更新日期:1996-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Interstitial laser thermotherapy was used to treat rat liver tumours. The aim was to investigate the influence of temperature and temporary hepatic inflow occlusion on tumour growth and blood perfusion. STUDY DESIGN/MATERIALS AND METHODS:Liver tumours were treated at 44°C at the tumour border ...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.21024
更新日期:2011-01-01 00:00:00
abstract::The pulsed dye laser (wavelength 504 nm, pulse duration 1 microsecond) is widely used for fragmenting urinary and biliary calculi. In this study, the performance of this laser was compared with pulsed dye lasers producing pulse durations of 8 and 20 microseconds. Fragmentation thresholds and fragmentation rates were m...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900090505
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:The Holmium: YAG (Ho: YAG) laser has been used for the ablation of prolapsed discs but alternative techniques are available, and this application remains controversial. It also has potential for the decompression of nerve roots within narrowed foraminae with the technique of endoscopic laser fo...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1083
更新日期:2001-01-01 00:00:00
abstract::We used a Q-switched Nd:YAG laser with non-linear optical crystals to produce the 5th (213 nm) and the 4th (266 nm) harmonic frequencies. Using these two wavelengths, we ablated fresh porcine corneas and type I collagen synthetic epikeratoplasty lenticules. For the 213-nm ablation, radiant exposure was 1.3 J/cm2. The ...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900110610
更新日期:1991-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Photodynamic therapy (PDT) is a minimally invasive therapeutic modality for the treatment of neoplastic and non-neoplastic diseases. The photochemical interaction of light, photosensitizer (PS) and molecular oxygen produces singlet oxygen which induces cell death. The effectiveness of zinc sulf...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.22121
更新日期:2013-03-01 00:00:00
abstract::Previous reports of effects of CO2 laser energy on human fibrocartilage suggest thermal injury extends to a depth of approximately 70 microns from the target surface with power settings of 35 W and exposure times of 0.5 seconds. The present study was undertaken to look for more subtle evidence of thermal alteration of...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900070209
更新日期:1987-01-01 00:00:00
abstract::CO2, Nd:YAG, and argon lasers have been used for 5 years for experimental and clinical procedures at the National Cancer Institute of Milan under the auspices of the National Research Council. Experimental data regarding tumor cell spread through lymphatic and hematic channels and cell viability in the fumes after CO2...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900020409
更新日期:1983-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:Attempts at using the pulsed dye laser (PDL) operating at 585 nm wavelength and 0.45 milliseconds pulse duration to treat leg veins have been notably unsuccessful. The aim of this study is to evaluate the efficacy and complications of the 595 nm long PDL in the treatment of leg veins. STUDY D...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.20035
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Little information is available regarding the effectiveness of laser prostatectomy in patients with urinary retention from benign prostatic hyperplasia since there is no paper specifically dealing with laser prostatectomy in patients in urinary retention. STUDY DESIGN/MATERIALS AND METHODS:Twe...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/(SICI)1096-9101(1996)19:4<480::AID-LSM15>3
更新日期:1996-01-01 00:00:00
abstract::Laser-induced fluorescence may be used to guide laser ablation of atherosclerotic lesions. This study was performed to evaluate arterial autofluorescence spectroscopy in vitro using a single XeCl excimer laser (308 nm) for simultaneous tissue ablation and fluorescence excitation. The laser beam was coupled to a 600-mi...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900140306
更新日期:1994-01-01 00:00:00
abstract::Laser physiology has shown that while wound healing is generally excellent after laser impaction, it nevertheless is delayed. It is thought that this factor may be important in the treatment of hypertrophic and keloid scars. These scars have been treated in a variety of ways with the laser, and the results, which have...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900030402
更新日期:1984-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:In this study, methylene blue-mediated photodynamic therapy (MB-PDT) was used as a possible alternative method for the treatment of oral lichen planus (OLP). STUDY DESIGN/MATERIALS AND METHODS:Thirteen patients with 26 OLP lesions were enrolled in this study. Patients were instructed to gargl...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.20278
更新日期:2006-01-01 00:00:00
abstract::A technique for partial nephrectomy using a combination of an Ultrasonic Surgical Aspirator and a neodymium:YAG laser provided better hemostasis and decreased total operative time compared to standard methods. Delayed hemorrhage was not seen, and thermal damage to the remaining renal parenchyma was minimal. ...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900060210
更新日期:1986-01-01 00:00:00
abstract:OBJECTIVES:This study aimed to determine the feasibility of conducting a full scale randomized controlled trial investigating the effectiveness of low level laser therapy (LLLT), also known as photobiomodulation (PBM) therapy, used in addition to conventional therapy, for managing breast cancer related lymphedema (BCRL...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章,随机对照试验
doi:10.1002/lsm.22947
更新日期:2018-09-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Chlorophyllin-M is a new chlorophyll-based derivative photosensitive compound developed by our research group with easy laboratorial synthesis and ideal properties for photodynamic therapy (PDT). It is intended for clinical treatments with simple and low cost techniques and reagents. The object...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.22362
更新日期:2015-07-01 00:00:00
abstract:BACKGROUND:Primary cutaneous amyloidosis (PCA) comprises three main forms: macular, lichen, and nodular amyloidosis. The current available treatments are quite disappointing. OBJECTIVES:Assess and compare the clinical and histological changes induced by different modes of Fractional CO2 laser in treatment of PCA. PAT...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章,随机对照试验
doi:10.1002/lsm.22361
更新日期:2015-07-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Verteporfin is a new photosensitizer with short-term skin photosensitivity. The objective of this preclinical study was to find the light dose that effectively ablates canine esophageal mucosa when delivered 30 minutes after Verteporfin injection. STUDY DESIGN/MATERIALS AND METHODS:Verteporfin...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.10014
更新日期:2002-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:A randomized clinical trial using the argon-green (514 nm) and the double-frequency Nd:YAG (532 nm) lasers was carried out on 42 eyes with proliferative diabetic retinopathy (PDR), with the aim of assessing the long-term effects of double-frequency Nd:YAG panretinal photocoagulation (PRP). MAT...
journal_title:Lasers in surgery and medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1002/(SICI)1096-9101(1996)19:2<173::AID-LSM8>3.
更新日期:1996-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Acne scarring is a common complication of acne but no effective single treatment modality has been developed. To compare the efficacy of 1,550 nm Er:Glass fractional laser and chemical reconstruction of skin scar (CROSS) method in the treatment of acne scars. STUDY DESIGN/MATERIALS AND METHODS...
journal_title:Lasers in surgery and medicine
pub_type: 临床试验,杂志文章
doi:10.1002/lsm.20796
更新日期:2009-10-01 00:00:00
abstract:OBJECTIVES:Our skin is constantly exposed to light from solar radiation and electronic devices, which impact skin physiology and aging. The biological altering properties of ultraviolet (UV) solar radiation on skin have been well established. There is significant scientific and public interest on the effects of electro...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.22794
更新日期:2018-02-05 00:00:00
abstract::The time constant model, as an approximation to the bio-heat equation, was tested for non-ablating, deep penetrating (argon) laser beams in absorbing tissue phantoms (polyacrylamide) in air. Temperature responses were measured with a thermal camera, both during laser irradiation as well as after the laser beam was swi...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900130615
更新日期:1993-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:The aim of this study was to evaluate the efficacy and safety of the intense pulsed light source (IPL) and the Nd:YAG laser in the treatment of facial rhytids. Both systems can be used in a non-ablative manner and cause a dermal wound. This is thought to stimulate the production of new collagen...
journal_title:Lasers in surgery and medicine
pub_type: 临床试验,杂志文章
doi:10.1002/lsm.1029
更新日期:2001-01-01 00:00:00
abstract::Percutaneous endoscopic approaches to cholelithiasis would be facilitated by methods for welding gallbladder tissues. We evaluated the bursting pressure and histologic appearance of canine gallbladder tissue welded with a thulium-holmium-chromium:YAG (THC:YAG) laser producing a 2.15 microns pulsed output. The tissue a...
journal_title:Lasers in surgery and medicine
pub_type: 杂志文章
doi:10.1002/lsm.1900090211
更新日期:1989-01-01 00:00:00