Shanghai International Conference on Laser Medicine and Surgery最新文献

{"title":"The clinical study of percutaneous disc decompression of treating herniation of cervical disc with Nd:YAG laser","authors":"Dianxue Zhang, He Cheng, Jindong Wang","doi":"10.1117/12.639386","DOIUrl":"https://doi.org/10.1117/12.639386","url":null,"abstract":"Objective: The possibility of PLDD (percutaneous laser disc decompression) and an ideal non-operative method which is long everlasting effect for PLDD was investigated. Methods: 159 patients of Cervical Disc Herniation with PLDD were studied. All the herniated discs were irradiated with 10-15J/S Nd:YAG laser quantum through optical-fiber under the supervision of C-arm X-ray. Results: All the patients were followed and reexamined CT or MRI after one to six months of PLDD. The result of cured (67.92%), excellent (24.53%), moderation (5.66%), non-effect (1.88%) was got. The excellent rate was 88.24%. The effective rate was 97.65%. Non-effective rate was 2.35%. Conclusion: When irradiated with Nd:YAG laser, the nucleus pulposus was vapouring, charring and coagulating. The volume and inner-pressure of the disc decreased. So the symptoms and signs improved. The main value of this methods were micro-damage, non-operation, no bleeding, no bone injury, good therapy effect, quick recovery, lesser pain, safety and excellent long everlasting effect. It is an ideal non-operative method of treating PLDD.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"122 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":"132403873","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}

{"title":"Ho:YAG laser application in cerebellopontine angle tumor operation","authors":"Yaohua Pan, Yu Wang, Xiaoxiong Li, Xiong Xiong, Yong Wang, Shanquan Li, Qi-zhong Luo, Jing Zhu, Weiguo Zhang","doi":"10.1117/12.639348","DOIUrl":"https://doi.org/10.1117/12.639348","url":null,"abstract":"We reported 25 cases of cerebellopontine angle (CPA) tumor operation with Ho:YAG laser assistance during the operative procedure. We analysed the surgical effects of Ho:YAG laser, compare it with CO2, Nd:YAG, argon laser, and illustrated its features and parameters. We think that Ho:YAG laser can be used to ablate and vaporize the tumor efficiently in the operation of the CPA tumors whose vascular supply is abundant and the texture is very tough. It can be used to reduce the bleeding and cooperate to incise tumor in the operation and improve the curable effect of the surgery.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"200 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":"115730677","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}

{"title":"Rethinking of photodynamic therapy on cerebral glioma: the difficulty of necrotic tissue exclusion and its sequence","authors":"Yongming Qiu, Zhaofeng Lu, Zhe Liu, Qi-zhong Luo","doi":"10.1117/12.639349","DOIUrl":"https://doi.org/10.1117/12.639349","url":null,"abstract":"The photodynamic therapy of cerebral gliomas is one kind of adjunctive therapy after operative tumor removal. But it is not widely accepted until now. We report two cases of failure treatment in our totally consecutive ten patients treated with this method and analyse the cause of the poor outcome. Unlike the uninary system and digest system, the difficult of necrotic tumor or brain tissue exclusion in the brain is marked and resulted in poor result. Our view is that the problem of massive necrotic tumor tissue exclusion which is the wish of therapist and the key of achieving good result might limit the further application of photodynamic therapy on cerebral gliomas.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"7 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":"121064852","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}

{"title":"The effects of ILLLI on peripheral blood T lymphocytes subpopulation and NK cells in psoriasis treatment","authors":"Jing Zhu, Fan Ni","doi":"10.1117/12.639326","DOIUrl":"https://doi.org/10.1117/12.639326","url":null,"abstract":"Objective: To research the effects of Intravascular low level laser irradiation (ILLLI) on the immulogic function of cells in treatment of psoriasis. Method: 49 patients suffered from psoriasis were treated by Intravascular low level laser irradiation (laser output power: 4-5mw, 1 hour per day, a course of treatment is 10 days). We checked the function of T lymphocyte subgroup and NK cell in peripheral blood between pre and post treatment. Results: 1. The mean value of CD3+ in post treatment is higher. P<0.05. Significant difference is showed between pre and post treatment. 2. The mean value of CD4+ in post treatment dropped slightly while the mean value of CD4/CD8, NK cell in post treatment increased little, nearly approach the mean value of natural person. 3. The mean value of CD4+,CD8+,NK cell which is under 30% increased the percent obviously after the treatment; The mean value of CD4+,CD8+ u higher than 30% obviously drop the percent, P≤0.05 and <0.01. Related statistical analysis showed significant and much significant difference between pre and post treatment. Conclusions: The low level laser irradiation (ILLLI) in treatment of psoriasis has bidirectional ajustive effect which can balance the immulogic function of cell.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"50 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":"116071411","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}

{"title":"The intravascular low level laser irradiation (ILLLI) in treatment of psoriasis clinically","authors":"Jing Zhu, Fan-Yao Nie, Hongmin Shi","doi":"10.1117/12.639321","DOIUrl":"https://doi.org/10.1117/12.639321","url":null,"abstract":"Objective: The title is research curative effect of intravascular low level laser irradiation (ILLLI) in treatment of psoriasis. Method: 478 patients with psoriasis from five groups to observe their efficacy. Group1 were treated by He-Ne laser combined with drug. Group 2 were treated by semi-conductor laser combined with drug. Group 3 were treated only by He-He laser. Group 4 were treated by semi-conductor laser. Group 5 were treated only by drug. The Ridit statistical analysis was applied to all of these data. The treatment of intravascular low level laser irradiation is as follow: laser power: 4-5mw, 1 hour per day and 10 days as a period combined with vit C 2.0 g iv and inhalation of O2. Results: The clinical results: the near efficient rate was 100%, in group 1-4, if combined with drugs it would be better. Ridit statistical analysis showed no significant difference between group1-4, p>0.05. The efficient rate 72.97% in group5.There were showed very significant difference with group1-4, p<0.01. 2.There were no significant differences between He-Ne laser (632.8nm) and semiconductor laser (650nm); 3.The efficacy of ILLLI in psoriasis was positive correlation to the ILLLI times. Conclusions: It can improve curative effect of intravascular low levellaser irradiation (ILLLI) in treatment of psoriasis.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"16 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":"116828148","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}

{"title":"Using transurethral Ho:YAG laser resection to treat urethral stricture and bladder neck contracture","authors":"Juanjie Bo, Shen-guo Dai, Xu-yuan Huang, Jing Zhu, Hui-guo Zhang, Hongmin Shi","doi":"10.1117/12.639346","DOIUrl":"https://doi.org/10.1117/12.639346","url":null,"abstract":"Objective: Ho:YAG laser had been used to treat the common diseases of urinary system such as bladder cancer and benign prostatic hyperplasia in our hospital. This study is to assess the efficacy and safety of transurethral Ho:YAG-laser resection to treat the urethral stricture and bladder neck contracture. Methods: From May 1997 to August 2004, 26 cases of urethral stricture and 33 cases of bladder neck contracture were treated by transurethral Ho:YAG-laser resection. These patients were followed up at regular intervals after operation. The uroflow rate of these patients was detected before and one-month after operation. The blood loss and the energy consumption of holmium-laser during the operation as well as the complications and curative effect after operation were observed. Results: The therapeutic effects were considered successful, with less bleeding and no severe complications. The Qmax of one month postoperation increased obviously than that of preoperation. Of the 59 cases, restenosis appeared in 11 cases (19%) with the symptoms of dysuria and weak urinary stream in 3-24 months respectively. Conclusions: The Ho:YAG-laser demonstrated good effect to treat the obstructive diseases of lower urinary tract such as urethral stricture and bladder neck contracture. It was safe, minimal invasive and easy to operate.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"1 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":"127264863","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}

{"title":"Photodynamic therapy on the ultrastructure of glioma cell","authors":"Shaoshan Hu, Ruyou Zhang, Yongri Zheng","doi":"10.1117/12.639223","DOIUrl":"https://doi.org/10.1117/12.639223","url":null,"abstract":"OBJECTIVE: the main purpose of this experiment was to study the change of C6 glioma cells' ultrastructure treated by photodynamic therapy (PDT), observe the change of morphology METHOD: Make the model of rat glioma by transplanted C6 glioma cells into caudate nucleus, treated the glioma rat by PDT after two weeks. Observed the difference of subcellular structure before and after PDT by electron microscope. RESULT: Apoptosis and necrosis can be seen after treated by PDT in the C6 glioma, basal membrance damaged, number of cellular organ of endothelial cell of blood capillary declined, tight junction of endothelial cell lengthen and the gap enlarge. The PDT has slightly effect on the nomorl rat's subcellular structue. CONCLUSION: PDT can induce the apoptosis and necrosis of C6 glioma cell. The damage of the ultramicrostructure of mitochondria and endoplasmic reticulum was the foundmentol of the change. PDT initiate the damage of BBB of the C6 glioma cell and weeken the function, and makes it a useful way of treating the glioma combined with chemotherapy.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"58 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":"126629181","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}

{"title":"Laser angioplasty for cardiovascular disease","authors":"M. Okada","doi":"10.1117/12.639345","DOIUrl":"https://doi.org/10.1117/12.639345","url":null,"abstract":"Recently, endovascular interventions such as balloon angioplasty, atherectomy and the stenting method, except for conventional surgery have been clinically employed for the patients with atheromatous plaques of the peripheral and the coronary arteries, because the number of patients with arteriosclerosis is now increasing in the worldwide. Among these procedures, restenoses after endovascular interventions have been remarkably disclosed in 20-40% of the patients who underwent percutaneous coronary interventions. Thus, there are still some problems in keeping long-term patency by means of endovascular techniques such as balloon angioplasty and atherectomy. For reduction of these problems, laser angioplasty using Argon laser was applied experimentally and clinically. Based on excellent experimental studies, laser was employed for 115 patients with stenotic, or obstructive lesions occluding more thasn 75% of the peripheral and the coronary arteries angiographycally.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"29 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":"122739572","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}

{"title":"Experimental study of biological effects on canine bronchia by Nd:YAP laser","authors":"Meixiang Qin, Xiaoqing Bao, Jing Zhu","doi":"10.1117/12.639193","DOIUrl":"https://doi.org/10.1117/12.639193","url":null,"abstract":"To observe the difference of biological effects on canine bronchia by Nd:YAP laser with different power and irradiation time. Method: The canine bronchia were irradiated with different power and different irradiation time. We observed the effects of ablation and thermal coagulation of different laser settings. We evaluated the damage scale with naked eyes, microscope and electroscope. Result: The thermal coagulation is primary and ablation is secondary. The dose of perforation is 10w, 3s. The diameter of facula is 3mm. Conclusion: (1) The thermal coagulation is primary and ablation is secondary for Nd:YAP laser shinning on canine bronchia. The ablation and thermal coagulation effect of Nd:YAP laser on canine bronchia is relevant to mean power and irradiation time. (2) Safety dose is less than 10w, 3s. The diameter of facula is 3mm.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"5 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":"114768446","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}

{"title":"Auto-simultaneous laser treatment and Ohshiro's classification of laser treatment","authors":"T. Ohshiro","doi":"10.1117/12.639111","DOIUrl":"https://doi.org/10.1117/12.639111","url":null,"abstract":"When the laser was first applied in medicine and surgery in the late 1960's and early 1970's, early adopters reported better wound healing and less postoperative pain with laser procedures compared with the same procedure performed with the cold scalpel or with electrothermy, and multiple surgical effects such as incision, vaporization and hemocoagulation could be achieved with the same laser beam. There was thus an added beneficial component which was associated only with laser surgery. This was first recognized as the '?-effect', was then classified by the author as simultaneous laser therapy, but is now more accurately classified by the author as part of the auto-simultaneous aspect of laser treatment. Indeed, with the dramatic increase of the applications of the laser in surgery and medicine over the last 2 decades there has been a parallel increase in the need for a standardized classification of laser treatment. Some classifications have been machine-based, and thus inaccurate because at appropriate parameters, a 'low-power laser' can produce a surgical effect and a 'high power laser', a therapeutic one . A more accurate classification based on the tissue reaction is presented, developed by the author. In addition to this, the author has devised a graphical representation of laser surgical and therapeutic beams whereby the laser type, parameters, penetration depth, and tissue reaction can all be shown in a single illustration, which the author has termed the 'Laser Apple', due to the typical pattern generated when a laser beam is incident on tissue. Laser/tissue reactions fall into three broad groups. If the photoreaction in the tissue is irreversible, then it is classified as high-reactive level laser treatment (HLLT). If some irreversible damage occurs together with reversible photodamage, as in tissue welding, the author refers to this as mid-reactive level laser treatment (MLLT). If the level of reaction in the target tissue is lower than the cells' survival threshold, then this is low reactive-level laser therapy (LLLT). All three of these classifications can occur simultaneously in the one target, and fall under the umbrella of laser treatment (LT). LT is further subdivided into three main types: mono-type LT (Mo-LT, treatment with a single laser system; multi-type LT (Mu-LT, treatment with multiple laser systems); and concomitant LT (Cc-LT), laser treatment in combination, each of which is further subdivided by tissue reaction to give an accurate, treatment-based categorization of laser treatment. When this effect-based classification is combined with and illustrated by the appropriate laser apple pattern, an accurate and simple method of classifying laser/tissue reactions by the reaction, rather than by the laser used to produce the reaction, is achieved. Examples will be given to illustrate the author's new approach to this important concept.","PeriodicalId":325950,"journal":{"name":"Shanghai International Conference on Laser Medicine and Surgery","volume":"23 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":"134355620","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}