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Experimental study on apoptosis induced by semiconductor laser to hair removal and armpit odor treatment 半导体激光脱毛和腋臭治疗诱导细胞凋亡的实验研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639199
Hongmin Shi, Min Yan, Meijue Zhang
Objective: To observe and explore the effects and mechanism of apoptosis on canine induced by Laser. Try to find a new approach to treat of armpit odor with no traumatism. Method: We used different power of semiconductor Laser to irradiate the black hair canine to observe and evaluate the tissue effects with electroscope, flow cytometry and Tunel technique at different period of time after irradiation. Result: The apoptosis has been observed within the hair follicle cells and apocrine gland cells after irradiation. After repeat irradiation in low power level, more apoptosis has been observed. Conclusion: Apoptosis exists in hair follicle cells and apocrine gland cells after Laser irradiation.
目的:观察和探讨激光诱导犬细胞凋亡的作用及机制。探索一种无创伤治疗腋臭的新方法。方法:用不同功率的半导体激光器照射黑毛犬,在照射后不同时间用电镜、流式细胞术和隧道技术观察和评价其组织效应。结果:辐照后毛囊细胞和大汗腺细胞均出现凋亡。低功率重复照射后,细胞凋亡增多。结论:激光照射后毛囊细胞和大汗腺细胞存在凋亡。
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引用次数: 1
Analysis on the effect of urethra caruncle treated by Ho:YAG laser 钬激光治疗尿道痈的疗效分析
Pub Date : 2005-07-25 DOI: 10.1117/12.639370
Meijue Zhang, Jing Zhu, Hongmin Shi
Objective: To observe the effect of Ho:YAG laser in treatment of urethra cauncle. Methods: The patients suffering from urethra cauncle were treated by Ho:YAG laser, the energy of per pulse is 0.5J. The frequency of pulse is 5~15Hz, and the average power of the laser is 2.5~7.5W. Results: Among the patients 188 cases of urethra cauncle were only cured for one time, twice for 12 cases. No stricture on the peristome of urethra or urethrovaginal fistula was observed. Conclusions: The technique of treatment of urethra cauncle with Ho:YAG laser is an effect and safe therapeutics with the merit of excellent homeostasis, improved visualization, minimal thermal damage to surrounding tissue, shorter period of recovery and easy to operate. It is better than CO2 laser and Nd:YAG laser.
目的:观察钬激光治疗尿道囊肿的疗效。方法:采用每脉冲能量0.5J的Ho:YAG激光治疗尿道挛裂。脉冲频率为5~15Hz,激光器平均功率为2.5~7.5W。结果:188例患者中仅治愈1次,治愈2次12例。未见尿道壁狭窄、尿道阴道瘘。结论:Ho:YAG激光治疗尿道前囊是一种安全有效的治疗方法,具有内稳态好、视觉效果好、对周围组织热损伤小、恢复时间短、操作简便等优点。其性能优于CO2激光器和Nd:YAG激光器。
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引用次数: 0
Laser application in the field of vascular anastomosis: experimental and clinical study 激光在血管吻合中的应用:实验与临床研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639343
M. Okada
Nowadays, much attention has been paid to keep long-term patency after vascular anastomosis especially for small-caliber vessels in vascular surgery. From these standpoints, low energy CO2 laser was used to make an anastomosis especially for small-caliber vessels. And then an availability of vascular anastomosis by laser could be apparently recognized.
目前,在血管外科手术中,保持血管吻合后的长期通畅已成为人们关注的焦点,尤其是小口径血管的吻合。从这些角度出发,低能CO2激光适合小口径血管的吻合术。由此可见激光血管吻合术的可行性。
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引用次数: 0
Treatment for intranasal synechiae by CO2 laser under endoscopic visualization 内窥镜下CO2激光治疗鼻内粘连
Pub Date : 2005-07-25 DOI: 10.1117/12.639313
Yunhai Feng, S. Yin
Objective To explore the feasibility and clinical value of treatment for intranasal synechiae by CO2 laser with reduce the incidence of complication in endoscopic sinus surgery. Methods A retrospective study was made of 31 cases treated for intranasal synechiae by CO2 laser. A CO2 laser was used to facilitate removed intranasal adhesion between the middle turbinate and the lateral nasal wall with minimal blood loss under endoscopic visualization. Results 31 cases were followed up beyond 24 months. The overall effective rate was 90.3%. 3 patients underwent a revision endoscopic procedure. Conclusions The method has many advantages such as clear operative field, safe and satisfactory. So it is a good way to treatment for intranasal synechiae.
目的探讨CO2激光治疗鼻内粘连的可行性及临床价值,降低鼻内窥镜手术并发症的发生率。方法对31例用CO2激光治疗鼻内粘连的病例进行回顾性分析。在内窥镜下,使用CO2激光去除中鼻甲与鼻侧壁之间的鼻内粘连,同时减少出血量。结果31例术后随访超过24个月。总有效率为90.3%。3例患者行内镜翻修手术。结论该方法具有手术视野清晰、安全、满意等优点。所以这是治疗鼻内粘连的好方法。
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引用次数: 0
Experimental study of biological effect on canine stomach in vitro by Nd:YAP laser Nd:YAP激光体外对犬胃生物效应的实验研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639192
Meijue Zhang, Jing Zhu, Hui-guo Zhang
Objective: To evaluate the biological effect of Nd:YAP laser in different power and irradiation time on canine stomach in vitro. Methods: The canine stomach in vitro was irradiated by Nd:YAP laser with different power and irradiation time. The damage with naked eye, micro and ultramicro structure was observed. Results: The thermal coagulation effect is mostly and the ablation effect is subordinate on biological effect of Nd:YAP laser on canine stomach in vitro. Thermal coagulation and denaturalization time of whole stratum in pathology is 10W, 5s; 20W, 4s; 30W, 2s; 40~60W, 1s. Conclusions: Safety dose of laser beam on canine stomach in vitro is 10W, time less than 5s; 20W, time less than 4s; 30W, time less than 2s. The ablation and thermal coagulation effects of Nd:YAP laser on canine stomach in vitro is positive correlative with power and time.
目的:研究Nd:YAP激光在不同功率和照射时间下对体外犬胃的生物学效应。方法:采用不同功率和照射时间的Nd:YAP激光辐照离体犬胃。用肉眼、微观和超微结构观察损伤情况。结果:Nd:YAP激光对体外犬胃的生物效应以热凝作用为主,烧蚀作用次之。病理全层热凝变性时间10W, 5s;20 w, 4 s;30 w、2 s;40 ~ 60 w, 1 s。结论:体外激光对犬胃的安全剂量为10W,时间小于5s;20W,时间小于4s;30W,时间小于2s。Nd:YAP激光对离体犬胃的消融和热凝作用与功率和时间呈正相关。
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引用次数: 0
Basic research in PDT PDT基础研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639219
J. Hayashi, K. Aizawa
Several photosensitisers are known to accumulate selectively in atheromas, regardless of the size of the involved artery. The new photosensitizer, mono-L-aspartyl chlorin e6 (NPe6), specifically accumulates in the atheroma. In the presence of NPe6, the atheroma could be recognized by detecting the specific fluorescence spectrum of NPe6 using a spectrophotometer. We developed a spectrum analysis system and reported that the fluorescence spectra of NPe6 emitted from atherosclerotic plaques on the descending thoracic aorta were recognized by this analysis system with an angioscopic approach in the animal model of atherosclerosis. We also detected the fluorescence spectrum peak at 675 nm of NPe6 laparoscopically only in parts of the abdominal aorta with an atheroma. This spectrum analysis system is useful to recognize the atheroma, but not to recognize the atherosclerotic lesions of the artery as a whole. So, we developed a fluorescence endoscope. Using the endoscopic analysis system, atheromas on the carotid artery were visualized as reddish spots from inside and outside the artery. Then we developed an epifluorescence stereoscope system, and using this device we visualized small coronary atherosclerosis specifically at the beating heart surface. We extensively examined the effects of photodynamic therapy with NPe6 on the atheroma. We studied the change in the lipid components of the atheroma using Fourier transform infrared (FTIR) microspectroscopy. FTIR microspectroscopic analysis showed a dissociation of ester bonds of cholesterol esters in the atheroma after photodynamic therapy. The framework of the atheroma and the lipids accumulated in the atheroma were destroyed. We also evaluated the change in the elastic framework in the atheroma using scanning electron microscopy. The destruction of the architecture of the elastic fiber network in the atheroma was revealed.
已知几种光敏剂选择性地积聚在动脉粥样硬化中,与受累动脉的大小无关。新的光敏剂,单l -天冬氨酸氯e6 (NPe6),专门积累在动脉粥样硬化。在NPe6存在的情况下,利用分光光度计检测NPe6的特异荧光光谱可以识别动脉粥样硬化。我们开发了一种光谱分析系统,并报道了该分析系统在动脉粥样硬化动物模型中通过血管镜方法识别出胸降主动脉动脉粥样硬化斑块发出的NPe6荧光光谱。我们也仅在部分有动脉粥样硬化的腹主动脉中检测到NPe6在675 nm处的荧光光谱峰。这种频谱分析系统对识别动脉粥样硬化有用,但不能识别整个动脉的动脉粥样硬化病变。所以我们发明了一种荧光内窥镜。使用内窥镜分析系统,颈动脉粥样硬化可见为动脉内外的红色斑点。然后我们开发了一个荧光立体镜系统,用这个设备我们可以看到小的冠状动脉粥样硬化特别是在跳动的心脏表面。我们广泛研究了NPe6光动力疗法对动脉粥样硬化的影响。我们使用傅里叶变换红外(FTIR)显微光谱研究了动脉粥样硬化中脂质成分的变化。FTIR显微光谱分析显示,光动力治疗后动脉粥样硬化中胆固醇酯的酯键解离。动脉粥样硬化的框架和积聚在动脉粥样硬化中的脂质被破坏。我们还利用扫描电子显微镜评估了动脉粥样硬化弹性框架的变化。揭示了动脉粥样硬化中弹性纤维网络结构的破坏。
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引用次数: 0
The neuroprotective effects of intravascular low level laser irradiation on cerebral ischemia rats 低水平激光血管内照射对脑缺血大鼠的神经保护作用
Pub Date : 2005-07-25 DOI: 10.1117/12.639317
Yongming Qiu, Zhaofeng Lu, Zhongguan Wang, Ji-yao Jiang
The effects of intravascular low level laser irradiation of He-Ne on rat MCAo-induced cerebral injury were studied. The results showed that control rats (subjected to MCAo injury without laser treatment) at 7d exhibited striatal and cortical brain infarction in the right hemisphere from approximately 3 to 11mm from the front pole. the total infarct volume in this group was 34.5±8.1mm3. For experimental rats (with laser management), the total infarct volume was 29.0±9.0mm3. P was gained less than 0.05. The neurological score of control group was 4.7±0.6 and it was 5.2±1.0 in experimental group, comparison by statistical analysis showed P less than 0.05. The cerebral pathological damages in the control group were more severe than in experimental group. We concluded that the intravascular low level laser irradiation has no remarked complication and is helpful to reduce ischemic damage. There is clinically potential for the application of intravascular He-Ne low level laser irradiation in ischemia stroke.
研究了He-Ne血管内低水平激光照射对mcao所致大鼠脑损伤的影响。结果显示,未进行激光治疗的MCAo损伤对照大鼠在第7天右半球出现纹状体和皮质性脑梗死,距前极约3 ~ 11mm。本组梗死总体积为34.5±8.1mm3。实验大鼠(激光处理)总梗死体积为29.0±9.0mm3。P < 0.05。对照组患者神经系统评分为4.7±0.6分,实验组患者神经系统评分为5.2±1.0分,差异有统计学意义,P < 0.05。对照组脑病理损伤较实验组严重。结论:低水平激光血管内照射无明显并发症,有助于减轻缺血性损伤。He-Ne低水平激光血管内照射治疗缺血性脑卒中具有临床应用潜力。
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引用次数: 1
A short-term follow-up study of photodynamic therapy on 23 cases of malignant tumors 光动力治疗23例恶性肿瘤的短期随访研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639209
Zhuo-Zheng Huang, Chuang Chen, Rong-bin Yang, Ying Zhao
Objective: To summarize the PDT short-term effect on malignant tumors. Method: Made follow-up observation and analysis of 23 cases of various kinds and different stages malignant tumors received photodynamic therapy. Results: Within the 23 cases, through 1-6 months follow-up, the results of tumor lesions treated by PDT are as follows: 15 cases revealed CR, 8 cases had PR and 5 patients died of other causes, nothing involving PDT. Of the 23 cases, 6 early stage tumor patients showed complete remission and no relapse occurred in the follow-up period; 17 cases of advanced stage patients revealed CR or PR effective results. Conclusion: The confined lesion of early stage malignant tumors can be cured by PDT, the advanced stage malignant tumor cases can also present good short-term effect or palliative results. So, PDT is one of the effective therapies for malignant tumors.
目的:总结PDT治疗恶性肿瘤的近期疗效。方法:对23例接受光动力治疗的不同类型、不同分期恶性肿瘤进行随访观察分析。结果:23例患者,经过1-6个月的随访,经PDT治疗的肿瘤病变结果如下:15例出现CR, 8例发生PR, 5例因其他原因死亡,与PDT无关。23例患者中,6例早期肿瘤完全缓解,随访期间无复发;17例中晚期患者出现CR或PR有效效果。结论:PDT对早期恶性肿瘤的局限性病变是可以治愈的,对晚期恶性肿瘤也有较好的短期疗效或姑息性效果。因此,PDT是治疗恶性肿瘤的有效方法之一。
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引用次数: 0
Experimental study on port-wine stain treated by small dose HpD and variable pulsed 532nm laser 小剂量HpD和可变脉冲532nm激光处理葡萄酒染色的实验研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639245
Meixiang Qin, Jing Zhu, Xiawen Yuan
To obtain a new therapy for port-wine stain (PWS) with good effect and few side effects, the Leghorn chicken combs chosen as the animal models and treated by small dose HpD and variable pulsed 532nm laser were evaluated clinically using four different scoring systems commonly used in previous publication. Result: It was shown significant difference among 5 groups (p<0.01), and the treatment groups have better effect than the control groups. There's also difference among the four treatment groups and the higher dose of HpD has better effect. In all groups the higher the fluency of laser was used, the better the effect produce. Conclusion: The results provide evidence that small dose HpD and variable pulsed 532nm laser can increase the efficacy of treatment in PWS. Increasing the fluency of laser and the dose of HpD can improve the efficacy.
为了获得一种效果好、副作用少的治疗port-wine stain (PWS)的新方法,选择Leghorn鸡冠作为动物模型,采用小剂量HpD和可变脉冲532nm激光治疗,采用文献中常用的四种不同的评分系统进行临床评价。结果:5组间比较差异有统计学意义(p<0.01),治疗组疗效优于对照组。四个治疗组之间也存在差异,HpD剂量越大效果越好。在所有组中,激光使用的流畅度越高,效果越好。结论:小剂量HpD和可变脉冲532nm激光可提高PWS的治疗效果。增加激光的流畅度和HpD的剂量可以提高疗效。
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引用次数: 0
Biological effects on canine uterus by Nd:YAP laser: an experimental study Nd:YAP激光对犬子宫生物学效应的实验研究
Pub Date : 2005-07-25 DOI: 10.1117/12.639198
Xiaoqing Bao, Jing Zhu, Hui-guo Zhang
Objective: To observe the difference of biological effects on canine uterus by Nd:YAP laser with different power and different irradiation time. Methods: The canine uteri were irradiated with different power and different irradiation time. The effects of ablation and thermal coagulation in different laser settings were observed. The damage scale was evaluated macroscopically, with lightscope and with electroscope. Results: The thermal coagulation is primary and the ablation is secondary. The dose of perforation is 30w, 2s; 20w, 4s and 10w, 5s. Conclusions: The thermal coagulation is primary and the ablation is secondary of Nd:YAP laser on canine uterus. Safety dose is less than 30w, 2s; 20w, 4s or 10w, 5s. The ablation and thermal coagulation effects of Nd:YAP laser on canine uterus are correlation to mean power and irradiation time.
目的:观察不同功率、不同照射时间Nd:YAP激光对犬子宫生物学效应的差异。方法:对犬子宫进行不同功率、不同照射时间的照射。观察了不同激光条件下烧蚀和热凝固的影响。用光镜和电显微镜对损伤程度进行了宏观评价。结果:热凝为主,消融为辅。穿孔剂量30w, 2s;20w, 4s和10w, 5s。结论:Nd:YAP激光对犬子宫的主要作用是热凝,其次是消融。安全剂量小于30w、2s;20w, 4s或者10w, 5s。Nd:YAP激光对犬子宫的消融和热凝作用与平均功率和照射时间有关。
{"title":"Biological effects on canine uterus by Nd:YAP laser: an experimental study","authors":"Xiaoqing Bao, Jing Zhu, Hui-guo Zhang","doi":"10.1117/12.639198","DOIUrl":"https://doi.org/10.1117/12.639198","url":null,"abstract":"Objective: To observe the difference of biological effects on canine uterus by Nd:YAP laser with different power and different irradiation time. Methods: The canine uteri were irradiated with different power and different irradiation time. The effects of ablation and thermal coagulation in different laser settings were observed. The damage scale was evaluated macroscopically, with lightscope and with electroscope. Results: The thermal coagulation is primary and the ablation is secondary. The dose of perforation is 30w, 2s; 20w, 4s and 10w, 5s. Conclusions: The thermal coagulation is primary and the ablation is secondary of Nd:YAP laser on canine uterus. Safety dose is less than 30w, 2s; 20w, 4s or 10w, 5s. The ablation and thermal coagulation effects of Nd:YAP laser on canine uterus are correlation to mean power and irradiation time.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"5967 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130103587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Shanghai International Conference on Laser Medicine and Surgery
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