No abstract available.
Laser Coagulation* ; Prostatic Hyperplasia*

Background: Interstitial Laser Coagulation (ILC) Indigo 830e system is the first technique that is used in Viet Nam for the treatment of Benign Prostatic Hyperplasia (BPH) patients. Objectives: (1) To evaluate the effects of treatment of benign prostatic hyperplasia by ILC Indigo 830e system. (2) To describe peri- and post-proceduce complications. Subjects and method: The study consisted of 106 BPH patients who treated by ILC Indigo 830e system. This was a cross-section, descriptive study. Results: Overally, good and moderate outcomes was 94.8%, unsatisfactory was 5.2%. The peri- and post-proceduce complications were: urethral irritability 20.8%, prolonged catheterization 4.7%, urinary tract infections 4.7% and hematuria 0.94%. Conclusion: The treatment for benign prostatic hyperplasia patients by ILC Indigo 830e system was an effective and safe therapy, especially in elderly patient group who had multiple diseases.
Benign prostatic hyperplasia ; interstitial laser coagulation

PURPOSE: To compare the pain scale and time necessary for panretinal photocoagulation (PRP) between Navilas(R) (OD-OS, Teltow, Germany) and conventional laser in diabetic retinopathy. METHODS: Fifteen patients who required PRP for diabetic retinopathy were enrolled in the present study. PRP was performed using Navilas(R) (5 x 5 array patterned system) in the superior, nasal and inferior areas, and using conventional laser at the temporal area 1 week later. Total time of laser application and number of laser shots were counted for calculating required time per 100 spots of each laser system. Immediately after the laser photocoagulation, patients were asked to quantify their pain on a visual analog pain scale (0 = no pain; 10 = worst pain). RESULTS: PRP using Navilas(R) required shorter time per 100 laser spots (27.7 sec vs. 102.0 sec, p < 0.001) and subjects had lower treatment-related pain than with the conventional laser system (3.3 vs. 6.9, p < 0.001). CONCLUSIONS: PRP using Navilas(R) can be considered as an efficient method for improving patient and operator's comfort with faster laser application and lower treatment-related pain.
Diabetic Retinopathy* ; Humans ; Laser Therapy* ; Light Coagulation* ; Pain Measurement

Adult ; Female ; Fetofetal Transfusion ; surgery ; Fetoscopy ; Humans ; Laser Coagulation ; Pregnancy

BACKGROUNDTherapeutic approaches for tracheal stenosis caused by the formation of exuberant granulation tissues usually include electrocautery, mechanical dilation, laser therapy, argon plasma coagulation (APC), cryotherapy and stent placement. However, restenosis after stent insertion remains a significant limitation. We examined the efficacy of three different approaches, including induction of mechanical lesions, APC performed with different powers or durations and cryotherapy, to identify the method that limited the formation of granulation tissue.

METHODSTwelve specially bred research mongrel dogs were divided into three groups. In group 1 (four dogs) mild (procedure 1; two dogs) or moderate (procedure 2; two dogs) damage was induced mechanically. Group 2 (six dogs) received APC at different powers or durations (procedure 3: 30 W, 1 cm/s; procedure 4: 30 W, 2 cm/s; procedure 5: 25 W, 3 cm/s). Group 3 (two dogs) received cryotherapy (procedure 6: two freeze-thaw cycles of 30 seconds). Uncovered self-expandable metallic stents were inserted in all dogs to maintain a continuous stimulus to the trachea mucosa. Dogs were monitored for 4 weeks and the relationship between granulation tissue proliferation and method used was analyzed.

RESULTSIn group 1, granulation tissue growth increased with more severe mechanical damage. The growth of granulation tissue in group 2 was more pronounced than in group 1, and both dogs in procedure 3 died because of severe stenosis. In this group, the formation of granulation tissue decreased with decreasing power and duration. In group 3, no obvious granulation tissue was found at week 4.

CONCLUSIONSLesions and stimuli from a foreign body (the stent) are two important factors that lead to overgrowth of granulation tissue. Thermal lesions, such as APC, seem to induce greater granulation tissue growth and cartilage damage compared with mechanical and cryotherapy lesions. Cryotherapy in combination with mechanical dilation may be a safe and effective treatment method for managing tracheal stenosis caused by the formation of granulation tissue.

Animals ; Bronchoscopy ; methods ; Cryotherapy ; Dogs ; Granulation Tissue ; pathology ; Laser Coagulation ; methods ; Stents ; Tracheal Stenosis ; therapy

To evaluate the clinical aspects of central serous chorioretinopathy, the patients were analysized and divided into three groups: group I) initial visitants; group II) those who undertook fluorescein angiography; and group III) those who had been followed over 3 months. The overall frequency of this disease was 0.69%. In group I, of 262 patients, 76.5% was male, 85.5% in the forth and fifth decades and 7.7% bilateral. In group II, of 130 eyes (120 patients), only neurosensory retina was detached in 121 eyes. Of which 106 eyes (87.6%) which had ink blot leakage and 95 eyes (78.5%) had one leakage point. In 96 eyes (79.3%), leakage point located within one disc from the fovea. In group III, of 105 eyes (95 patients), initial visual acuity was better than 0.7 in 58 eyes (55.2%) and worse than 0.3 in 14 eyes (13.3%). Final visual acuity was better than 0.7 in 94 eyes (89.5%) and worse than 0.3 in 4 eyes (4.0%). In 34 eyes which were laser-treated, duration of recovery (10.8 vs 6.4 weeks; P=0.016) and frequency of recurrence (42.3 vs 17.6%; P=0.013) decreased to a statistically significantly compared with 71 conservatively treated eyes. Central serous chorioretinopathy has the high possibility of recurrence and therefore should be followed up periodically for possible need for laser photocoagulation.
Central Serous Chorioretinopathy ; Fluorescein Angiography ; Humans ; Ink ; Laser Therapy ; Light Coagulation ; Male ; Recurrence ; Retina ; Visual Acuity

Transpupillary retinal photocoagulations were performed on ten eyes of five pigmented rabbits using a diode laser (Nidek Co., LTD, Aichi, Japan) emitting infrared radiation at 800 nm wavelength. A histological and an ultrastructural study on the treated eyes were done at 1, 3, 5, and 7 days after retinal photocoagulations. The purpose of this study was to observe the sequential changes in the retina and the choroid following transpupillary diode laser retinal photocoagulations at the parameters of laser power which produced a grayish white retinal discoloration with distinct white center. It seemed that the lesion was grade 3 retinal photocoagulation by Tso et al's classification. It appeared that the parameters necessary to produce grade 3 photocoagulation lesions were 160 mW power, and 0.2 second duration at 200 microns size. In general, with an agreement to other reports, histologic study of the diode laser lesions showed that the outer retina was damaged more severely than the inner retina. However, on day 1 after laser treatment, the alterations were more profound in the inner retina than in the outer retina and an occasional swelling of the axons in the nerve fiber layer was observed on the ultrastructural study. The results observed have not been found in other previous studies and suggest that the inner retina might be injured directly by 800 nm wavelength diode laser radiations. Thus we could conclude that 800 nm wavelength diode radiation might be absorbed by melanin pigment and also by other chromophores contained in inner retinal tissues. Further studies must follow to verify the laser-tissue interactions in diode laser retinal photocoagulations.
Animals ; Laser Coagulation/*adverse effects ; Rabbits ; Retina/pathology/*radiation effects/ultrastructure

BACKGROUND: The current modality of choice for the treatment of Port-wine stains (PWS) is laser photocoagulation. Laser therapy for the treatment of PWS, especially with a pulsed dye laser (PDL), has been proven safe and effective; however, because penetration of the PDL is too shallow for an effective ablation of the blebs, treatment of blebbed PWS, using PDL, may be insufficient. OBJECTIVE: We demonstrated the clinical efficacy of a 1,064 nm long pulsed Nd:YAG laser with contact cooling device for blebbed PWS. METHODS: Twenty one patients with blebbed PWS (Fitzpatrick skin types II-V) underwent a treatment, using a 1,064 nm long pulsed Nd:YAG laser with a contact cooling device at 8-week intervals. Treatments were done using 5~6 mm spot sizes at 20~30 ms and 95~170 J/cm2. Laser parameters were adjusted in order to meet the needs of each individual patient's lesions. RESULTS: All subjects tolerated the treatments well, and showed clinical improvement from blebs. Of the 21 patients, 18 of them experienced either moderate or excellent response. CONCLUSION: Use of a 1,064 nm long pulsed Nd:YAG laser results in a greater depth of vascular coagulation. A 1,064 nm long pulsed Nd:YAG laser with contact cooling device may be regarded as a promising therapeutic option for the treatment of blebbed PWS.
Blister ; Humans ; Laser Therapy ; Lasers, Dye ; Light Coagulation ; Port-Wine Stain ; Skin

PURPOSE: To evaluate the effects of laser photocoagulation on reopened macular holes. METHODS: This study involved 9 eyes from 9 patients who underwent laser photocoagulation coupled with fluid-gas exchange for reopened macular holes. The photocoagulation was performed at the center of the macular hole. Closure of the reopened hole was categorized by optical coherence tomography (OCT) according to the presence (type 1 closure) or absence (type 2 closure) of continuity in the foveal tissue. Best corrected visual acuity (BCVA), closure types, and complications were assessed. RESULTS: Upon final examination, all macular holes were found to have closed. Six eyes were classified as type 1 closure, and three were classified as type 2 closure. The mean BCVAs, before and after laser photocoagulation, were 0.11 and 0.31, respectively (P< .05). The eyes with type 1 closure were associated with shorter symptom durations and greater visual improvement than those with type 2 closure (P< .05). CONCLUSIONS: The combination of laser photocoagulation and fluid-gas exchange appears to be a safe and effective treatment for reopened macular holes. Early intervention should be encouraged to ensure complete hole closure and improved visual outcomes.
*Tomography, Optical Coherence ; Retinal Perforations/*pathology/*surgery ; Recurrence ; Middle Aged ; Male ; *Laser Coagulation ; Humans ; Female ; Aged

Argon ; Gastric Antral Vascular Ectasia ; physiopathology ; therapy ; Humans ; Laser Coagulation ; methods ; Male ; Middle Aged