Q开关Nd:YAG 1 064 nm激光对糠秕马拉色菌细胞活性、蛋白酶活性及结构的影响

目的:探讨不同能量Q开关Nd:YAG 1 064 nm激光对糠秕马拉色菌的细胞活性、蛋白酶活性及菌体结构的影响。方法:选用糠秕马拉色菌标准株,分别予以Q开关Nd:YAG 1 064 nm激光0（对照组）、500、600、700、800、900 mJ能量照射,培养7 d后测量各组菌落直径及菌落数,评估菌体细胞活性,采用全...     

Q开关Nd:YAG 1064 nm激光照射对体外培养的PIG细胞黑素合成的影响

目的 探讨Q开关Nd:YAG 1064 nm激光照射对体外培养的人表皮黑素细胞系PIG细胞黑素合成的影响。方法 选择Medlite C6 Q开关Nd:YAG激光照射体外培养的PIG细胞,MTT法检测PIG细胞的活性,多巴氧化法检测酪氨酸酶活性的变化,荧光定量反转录（RT）-PCR和Westenr印迹分别检测酪氨酸酶相关蛋白（TRP）转录和蛋白表达水平。结果 ①在不影响细胞存活率的范围内,1 J/cm2照射后24 h时,PIG细胞酪氨酸酶活性（0.563 ± 0.014）与空白对照组（0.501 ± 0.019）比较轻度增加（P ＜ 0.05）,酪氨酸酶与TRP-1 mRNA表达（分别为1.40 ± 0.11,1.28 ± 0.03）与空白对照组（1.0）比较明显上调（P ＜ 0.05）,而TRP-2 mRNA表达（0.91 ± 0.17）并无明显变化（P ＞ 0.05）,其蛋白水平的变化与转录水平相符。②在不影响细胞活性的范围内,3 J/cm2照射后24 h时,PIG细胞酪氨酸酶活性（0.343 ± 0.012）与空白对照组（0.501 ± 0.019）比较明显下降（P ＜ 0.05）,酪氨酸酶、TRP-1和TRP-2的mRNA表达（分别为0.70 ± 0.02、0.73 ± 0.04、0.68 ± 0.04）和蛋白表达（分别为0.64 ± 0.05、0.86 ± 0.17、0.69 ± 0.11）与空白对照组（1.0）相比均不同程度的降低（P ＜ 0.05）。结论 Q开关Nd:YAG 1064 nm激光照射可以影响PIG细胞的黑素合成。在不影响细胞存活率的范围内,能量密度为1 J/cm2的Q开关 Nd:YAG 1064 nm激光照射能够刺激黑素合成,而3 J/cm2的照射对黑素合成有抑制作用。     

大光斑低能量Q开关Nd:YAG激光联合中药面膜治疗黄褐斑疗效观察

目的探讨大光斑低能量Q开关Nd:YAG激光联合中药面膜治疗黄褐斑的疗效及安全性。方法 90例患者随机分为3组。治疗组予Q开关Nd:YAG激光联合中药面膜;对照1组单纯予Q开关Nd:YAG激光治疗;对照2组单纯予中药面膜。Q开关Nd:YAG激光治疗波长1 064nm,光斑6mm,能量1.5~3.0J/cm~2,每周1次。外敷中药面膜每周2次。12周进行疗效评价。结果治疗组有效率83.33%,对照1组63.33%,对照2组50.00%,治疗组与对照1组,对照2组之间的差异具有统计学意义(P0.05),对照1组与对照2组之间的差异无统计学意义(P0.05)。结论大光斑低能量Q开关Nd:YAG激光联合中药面膜治疗黄褐斑安全、有效。     

长脉冲Nd:YAG 1064nm激光对红色毛癣菌生长及超微结构的影响

目的:确定长脉冲Nd:YAG 1064 nm激光对临床分离红色毛癣菌Y生长及超微结构的影响。方法:长脉冲Nd:YAG 1064 nm激光以200 J/cm~2、400 J/cm~2、600 J/cm~2能量体外照射含有等菌量的红色毛癣菌Y菌落,观察照射后菌落生长的变化,同时将激光照射前后的菌落制备成标本,分别用扫描电镜及透射电镜观察其超微结构变化。结果:长脉冲Nd:YAG 1064 nm激光能量为400 J/cm~2时,可抑制红色毛癣菌Y菌落的生长,600 J/cm~2时,红色毛癣菌Y菌落停止生长。激光照射后的红色毛癣菌Y菌落,在扫描电镜下菌丝结构由光滑变为粗糙,延长变为皱缩、截短,膨大;透射电镜下菌体细胞壁及细胞器结构破坏。可见髓样小体及蛋白凝固体。600 J/cm~2处理组:菌体崩解、坏死。结论:长脉冲Nd:YAG 1064 nm激光可抑制或终止红色毛癣菌菌落的生长,改变菌体的超微结构。     

Q-开关倍频Nd:YAG激光与Q-开关翠绿宝石激光治疗雀斑的疗效对比观察

<正>Q-开关倍频Nd∶YAG激光治疗仪,波长为532nm,755nm,1 064nm和可变的脉宽激光。Q-开关的波长为532nm,激光光源为Nd∶YAG,光斑直径2~6mm,调整能量密度为0.36~6.0J/cm2。Q-开关翠绿宝石激光治疗仪波长为755nm,固定脉宽45ns,光斑直径2~6mm,能量密度为0.85~12.0J/     

调Q开关激光治疗面部褐青色痣的疗效观察

<正>应用调Q开关激光Nd:YAG治疗机治疗面部褐青色痣患者70例,波长为1 064nm,能量密度400~800mJ/cm2,光斑直径3mm。,频率1~5Hz,共治疗2~6次,术后3~6个月复诊判定疗效和不良反应。结果:治愈27例(38.6%),有效率100%。疗效与治疗次数成正比。认为调Q开关激光Nd:YAG治疗机治疗面部褐青色痣疗效确切,除有部分患者发生暂时性色素沉着外,未见     

激光联合混合波长治疗颧部褐青色痣

<正>选择Nd:YAG激光,波长1 064nm,光斑直径3~4mm,能量密度3.5~4.5J/cm2,频率10Hz,脉宽10ns,对某些疗效不佳且色素较浅层患者改用或交替选择532nm波长,光斑直径3~4mm,能量密度1.5~2.0J/cm2,频率1~5Hz,治疗间隔时间为2~3个月,一般治疗3~4次。结果:36例(51.43%)患者出现色素沉着,12例(17.14%)出现暂时性色素减退。认为Q开关Nd:YAG激光1064nm联合532nm波长治疗颧部褐青色痣效果     

Q开关Nd:YAG1064nm激光碳膜术联合粉刺挤压术治疗轻、中度痤疮48例临床观察

目的观察Q开关Nd:YAG 1 064nm激光碳膜术联合粉刺挤压术治疗轻、中度痤疮的临床疗效和安全性。方法将入选的96例轻、中度痤疮患者按随机数字表法随机分为两组,全部患者行粉刺挤压术,治疗组同时予Q开关Nd:YAG 1 064nm激光碳膜术治疗,每7~10d治疗1次,4次为1个疗程。结果4次治疗后,治疗组有效率(85.42%)明显高于对照组有效率(62.50%),差异有统计学意义(P0.05),未发生明显不良反应。结论 Q开关Nd:YAG 1 064nm激光碳膜术联合粉刺挤压术治疗轻、中度痤疮的疗效优于单纯粉刺挤压术的疗效,且安全性好。     

585 nm Q开关脉冲激光、强脉冲光及长脉宽Nd:YAG激光治疗皮肤血管性疾病临床疗效比较

目的:观察比较585nmQ开关脉冲激光、强脉冲光及长脉宽1064nm Nd:YAG激光治疗皮肤血管性疾病的临床疗效和不良反应.方法:分别应用585nm Q开关脉冲激光(能量密度3.0～6.0 J/cm2,脉宽10ns)、590～1200 nm强脉冲光(能量密度30～60 J/cm2,脉宽3.0～5.5 ms)以及长脉宽1064nm Nd:YAG激光(能量密度120-145J/cm2,脉宽20～50ms)共治疗1415例毛细血管扩张、977例蜘蛛痣、742例血管瘤及442例鲜红斑痣患者.结果:585 nm Q开关脉冲激光、强脉冲光及长脉宽Nd:YAG激光治疗毛细血管扩张的有效率分别为86.3%、89.7%及88.6%;治疗蜘蛛痣的有效率分别为97.2%、96.5%及98.8%;治疗血管瘤的有效率分别为51.2%、59.6%及74.2%;治疗鲜红斑痣的有效率分别为28.4%、33.1%及40.3%.长脉宽Nd:YAG激光治疗血管瘤及鲜红斑痣的瘢痕发生率分别为8.5%和10.7%.结论:3种治疗方法对毛细血管扩张、蜘蛛痣及鲜红斑痣疗效无明显差异;长脉宽1064nm Nd:YAG激光治疗血管瘤的有效率明显优于585nm Q开关脉冲激光及强脉冲光,但瘢痕发生率也较高.     

长脉宽与Q开关1064 nm Nd:YAG激光对皮肤作用的比较

目的:比较长脉宽1064 nm Nd:YAG激光和Q开关1064 nm Nd:YAG激光照射对小鼠皮肤的影响.方法:分别使用长脉宽1064 nm Nd:YAG激光(脉宽为3 ms、50 ms)和Q开关1064 nm Nd:YAG激光(脉宽5 ns)对小鼠背部脱毛后的皮肤进行照射,共照射4次,每次间隔1周.检测照射后不同时间点的皮肤弹性、皮肤羟脯氨酸含量,真皮内胶原增生情况以及红斑指数和经表皮失水量的变化情况.结果:从首次照射后第3或4周至第7周,各实验组的皮肤弹性都明显好于对照组;首次照射7周后各组实验侧的皮肤羟脯氨酸含量和真皮内胶原厚度都较对照组显著增大(P＜0.01),但各实验组之间无显著差异;苦味酸一天狼猩红染色-偏振光法检查显示各组增生的胶原主要为I型胶原.首次激光照射后即刻,各实验组的经表皮失水量及Q开关1064 nm Nd:YAG激光实验组的红斑指数都较其对照组显著增高(P＜0.01),并于1周内恢复.结论:长脉宽1064 nm Nd:YAG激光可以取得与Q开关1064 nm Nd:YAG激光对皮肤相似的效果,且不良反应较轻.     

Nd:YAG 1064nm激光治疗鲜红斑痣动物模型的研究

目的 通过动物模型观察可调脉宽Nd:YAG 1064 nm激光对鲜红斑痣的治疗作用。方法 以10只莱亨鸡鸡冠作为鲜红斑痣动物模型,随机分为5组,每组2只,其中1组作为空白对照不给予照射,其余各组分别以90、100、110、120 J/cm²能量密度照射,脉宽11.5 ms,光斑直径均为6 mm,每只鸡鸡冠照射四个区域。分别观察照射后鸡冠形态学和组织学的变化,并对照射前后每高倍镜下血管数的变化进行统计学分析。结果 经1次照射,鸡冠被照射区域颜色变淡,光镜下可见真皮的血管层变薄,血管闭锁,血管数目减少,腔内少量或无红细胞。与照射前比较,照射后血管数有明显减少(P<0.05),在一定范围内,能量越高,变化越明显。结论 可调脉宽Nd:YAG 1064 nm脉冲激光可以引起真皮血管闭锁,血管减少,血管层变薄,从而达到对鲜红斑痣的治疗作用。     

大光斑低能量Q开关1064nm Nd:YAG激光治疗雀斑

目的:评价大光斑低能量模式Q开关1064 nm Nd:YAG激光治疗雀斑的疗效和安全性。方法:应用大光斑低能量模式Q开关1064 nm Nd:YAG激光治疗15例成人女性雀斑患者。治疗参数:波长1064 nm,脉宽10 ns,光斑7 mm,能量密度1.5~2.0 J/cm2,频率10 hz,每2~3周一次,治疗3~5次。末次治疗结束后随访6个月。结果:8例患者76%~100%皮损颜色变淡,4例51%~75%皮损颜色变淡,3例26%~50%皮损颜色变淡。所有患者治疗后仅有轻微红斑,数小时内消退,治疗后无色沉发生。随访6个月后2例患者复发。结论:大光斑低能量Q开关1064 nm Nd:YAG激光治疗雀斑安全有效。     

Laser treatment of onychomycosis: an in vitro pilot study

Background: Laser treatment of onychomycosis is the object of considerable interest. Laser therapy could be a safe and cost‐effective treatment modality without the disadvantages of drugs. Some studies have described the inhibitory effects of lasers on the growth of fungal colonies. We therefore examined the effects of various laser wavelengths, which have previously shown inhibitory potential, on the fungal isolate Trichophyton rubrum. Patients and Methods: Isolates of fungal colonies were placed clockwise on culture plates. Each culture plate was irradiated on one half with one of the following treatment regimens: 1064 nm‐Q‐switched Nd:YAG laser at 4 J/cm² and 8 J/cm²; 532 nm‐Q‐switched Nd:YAG laser at 8 J/cm²; 1064 nm‐long‐pulsed Nd:YAG laser at 45 J/cm² or 100 J/cm². The other half remained untreated. Standardized photographs were taken and areas of treated and untreated colonies were compared for growth inhibition. Results: There was no inhibition of fungal growth in any of the treated plates. Differences in size between treated and untreated colonies were not significant (p > 0.10). Conclusions: In this in vitro study Nd:YAG laser treatment of Trichophyton rubrum colonies failed to inhibit fungal growth. Nevertheless there might be an effectiveness in vivo which has to be clarified by clinical studies.     

Combination visible and infrared lasers for skin rejuvenation

Noninvasive techniques for skin rejuvenation are quickly being established as a new standard in the treatment of mild rhytides and overall skin toning. Multiple laser wavelengths and modalities have been tried for this procedure with varying degrees of success. These lasers include 532 nm, 585 nm, 1064 nm, 1320 nm, 1450 nm, and 1540 nm wavelengths. This study evaluates a combination technique by using a long-pulsed 532 nm potassium titanyl phosphate (KTP) laser and a long-pulsed 1064 nm Neodynium:yttrium aluminum garnet (Nd:YAG) laser, both separately and combined, for noninvasive photorejuvenation and skin toning/collagen enhancement, and establishes efficacy and degree of success. A total of 150 patients were treated with the long-pulsed KTP 532 nm (Aura; Laserscope, San Jose, CA) and long-pulsed Nd:YAG 1064 nm (Lyra; Laserscope) lasers both separately and combined. Patients included skin types I through V. The fluences varied between 7 and 15 J/cm2 at 7 to 20 ms pulse duration with a 2-mm handpiece, and 6 to 15 J/cm2 and 30 to 50 ms with a 4-mm handpiece for KTP. The Nd:YAG fluences were set at 24 to 30 J/cm2 for a 10-mm handpiece and 30 J/cm2 for a SmartScan Plus scanner (Laserscope, San Jose, CA). These energies were delivered at 30 to 65 ms pulse durations. All patients were treated at least 3 times and at most 6 times at monthly intervals, and were observed for up to 18 months after the last treatment. All 150 patients exhibited a mild to moderate degree of improvement in the appearance of rhytides, moderate degree of improvement in skin toning and texture, and great improvement in the reduction of redness and pigmentation. The KTP used alone was superior to the Nd:YAG laser in terms of results. The KTP and Nd:YAG laser combination was superior to either laser used alone.     

大光斑低能量Q开关Nd:YAG激光治疗黄褐斑的临床及动物研究

目的探索激光治疗黄褐斑的合适方法和作用机制。方法采用大光斑低能量的QSNY分别进行临床试验和动物实验,并通过皮肤反应、MCI、CLSM和组织病理学等多种方法评估该方法治疗黄褐斑的有效性和安全性。结果临床试验显示:治疗结束后,基本治愈8例,显效25例,好转12例,无效1例,有效率为73.33%;MCI显著降低,较治疗前有统计学意义(P<0.05);CLSM见基底层及棘层中下部黑素显著减少,但是可见MC,且树突长。动物实验显示:治疗结束后豚鼠皮肤色素沉着完全消退,MCI显著降低,较治疗前有统计学意义(P<0.01),CLSM和组织病理见毛囊周围及基底层黑素颗粒和MC均显著减少;但是随访4周发现色素沉着复发,肉眼达治疗前的80%~90%,MCI显著增高,但较治疗前有统计学差异(P<0.05);CLSM和硫酸亚铁染色见黑素颗粒明显增加,MC的数目、密度明显增多。阳性对照组皮肤治疗前后无明显改变。结论大光斑低能量的QSNY治疗黄褐斑短期内疗效肯定,副作用小,但有复发的高风险。     

Comparison of biophysical properties of skin measured by using non-invasive techniques in the KM mice following 595 nm pulsed dye, 1064 nm Q-Switched Nd:YAG and 1320 nm Nd:YAG laser non-ablative rejuvenation

BACKGROUNDS/AIMS: The aim of the study was to compare the changes of the biophysical properties and to objectify the effects of 595 nm pulsed dye, 1064 nm Q-switched Nd:YAG and 1320 nm Nd:YAG lasers non-ablative rejuvenation by non-invasive techniques. METHODS: KM mice were used for the study. The 595 nm pulsed dye, 1064 nm Q-switched Nd:YAG and 1320 nm Nd:YAG laser treatments were evaluated with biophysical parameter measurements including skin elasticity, skin color, skin trans-epidermal water loss (TEWL) and skin hydration. RESULTS: All three lasers improved the biophysical properties in the skin of KM mice. In skin elasticity measurements, the 1064 nm laser treatment showed the lowest ratio (0.61+/-0.09) while the 1320 nm laser showed the highest one (0.76+/-0.07) on day 60. For erythema values, a significant increase was observed immediately after the 1064 nm laser treatment (196.67+/-19.17), but the lowest values occurred with the 1320 nm laser treatment (189.83+/-16.54). None of the three lasers resulted in obvious changes of skin melanin. TEWL increased immediately after laser irradiation, then began to recover and decreased 60 days after the 595 and 1064 nm laser treatments. With the 1320 nm laser treatment the TEWL began to decrease from day 7 and obtained the lowest mean values (5.23+/-1.13). The water-holding capacity increased initially for the 595 and 1320 nm laser irradiation, while decreased for the 1064 nm laser. At day 60 of the experiment, skin hydration values in all animals were superior to those of the controls. The 1320 nm laser treatment caused the highest ratio (1.29+/-0.26). Both the values of TEWL and skin hydration for the 1320 nm laser treated areas differed significantly from the other two lasers. CONCLUSIONS: Our data showed the 1064 nm Q-switched Nd:YAG laser treatment was most effective in improving the skins' mechanical properties, while the 1320 nm Nd:YAG laser can enhance greatly the skin barrier function and the water-holding capacity. Moreover, we demonstrated the biophysical properties differed considerably between different areas.     

Treatment of facial reticular veins with dynamically cooled, variable spot-sized 1064 nm Nd:YAG laser

Background Facial reticular veins are often seen on the temple and periorbital areas in patients with genetic predisposition or after facial cosmetic surgery. Aim The purpose of this study was to evaluate the efficacy and safety of dynamically cooled, variable spot sized 1064 nm Nd:YAG laser in the treatment of facial reticular veins. Patients/methods This is a retrospective study. Twenty patients with facial reticular veins who underwent treatment with dynamically cooled, variable spot sized 1064 nm Nd:YAG laser were evaluated. Patients were followed up 1 month to 2 years after the procedure. Results Objective and subjective improvement scores after one or two treatments of dynamically cooled, variable spot sized 1064 nm Nd:YAG laser were nearly 100% when appropriate parameters were used. Conclusion Dynamically cooled, variable spot sized 1064 nm Nd:YAG laser is a safe and effective treatment for facial reticular veins. Most patients responded to one treatment and experienced no significant side effects other than tolerable pain associated with the procedure.     

长脉宽1064nm Nd:YAG激光治疗甲真菌病

目的:评价长脉宽1064nm Nd:YAG激光治疗甲真菌病的疗效。方法:60例甲真菌病患者给予长脉宽1064nm Nd:YAG激光治疗,每周1次。结果:治疗结束后6个月有效率为60%。完成4次(23例)和8次治疗(32例)患者的有效率分别为34.8%和78.1%(P0.01)。结论:Nd:YAG1064nm激光治疗甲真菌病有效,疗效与治疗次数相关。