Mucotomy is one of the most frequently applied surgical techniques for the management of inferior turbinate hyperplasia. Mucotomy guarantees patent airway, however, it might lead to the emergence of sicca syndrome. In...Mucotomy is one of the most frequently applied surgical techniques for the management of inferior turbinate hyperplasia. Mucotomy guarantees patent airway, however, it might lead to the emergence of sicca syndrome. In contrast, KTP (potassium titanyl phosphate) laser treatment spares the medial part of the inferior turbinate mucosa, contributing to maintenance of physiological nasal function. A retrospective comparative clinical study was performed to reveal the advantages and side-effects of both surgical methods in medium- and long-term in allergic rhinitis and non-allergic patients. Furthermore, we wished to determine the exact indications of the up-to-date laser treatment. Ninety-one of the 117 patients who underwent bilateral turbinate surgery during an 8-year period (2000-2007) responded to our questionnaire focusing on subjective postoperative changes. Patients were separated into 6 groups, based on the type of operation they underwent, the length of the follow-up and whether they suffered from allergies. The major complaint, nasal obstruction, improved in all 6 groups, which reached significance (p ? 0.05) in 4 groups. The most pronounced improvement was observed in the group of non-allergic patients with medium-term follow-up who underwent mucotomy. Nevertheless, a serious side- effect: crusting also increased significantly (p ? 0.05) in the latter group, while it was absent in allergic patients with medium-term follow-up, who underwent mucotomy. These results lead us to propose the following protocol for the treatment of inferior turbinate hyperplasia: 1) after unsuccessful conservative treatment, laser treatment is suggested for non-allergic patients;2) following unsuccessful conservative and even repeated laser treatment in the allergic group, mucotomy or turbinoplasty should be attempted.展开更多
To explore the application of potassium titanyl phosphate （KTP） laser delivered via hronchofiherscope in the treatment of endohronchial tuberculosis. 36 patients with a diagnosis of endobronchial tuberculosis, with ...To explore the application of potassium titanyl phosphate （KTP） laser delivered via hronchofiherscope in the treatment of endohronchial tuberculosis. 36 patients with a diagnosis of endobronchial tuberculosis, with age ranging from 15 to 40 y were treated with KTP laser between Dec. 2002 and July 2004 （designated as treatment group）. The other 36 patients diagnosed as having endobronchial tuberculosis （aged 18 to 42 y, with a mean age of 33.5 y） without having received KTP laser treatment were included in a control group. Our results showed that the effective rates, in terms of recovery of bronchial lumen and cleanup of caseous necrotic mass were significantly higher in the treatment group 8 weeks after the treatment （P〈0.01）, and the healing rates of atelectasis and obstructive infection were also significantly higher in the treatment group （P〈0. 05 and P〈0.01）, but the incidence of complication after 8 weeks was no significant difference （P 〉0.05）. No significant changes were found in SaO2 and HR before, during and after the operation in the treatment group （P〉0.05）. It is concluded that KTP laser is an effective therapy for endobronchial tuberculosis.展开更多
Diode end-pumped solid-state lasers have the potential to yield high quality laser beams with high efficiency for laser range finding and warning receiver applications as well as day and night military laser designati...Diode end-pumped solid-state lasers have the potential to yield high quality laser beams with high efficiency for laser range finding and warning receiver applications as well as day and night military laser designation systems. In this paper we presents theoretical calculations using Advanced Dynamics Professional LASCAD software and experimental studies for a high power pigtailed fiber diode laser module of 8 W operating at 808 nm with a specially designed high efficiency cooling system, end pumped high-efficiency Nd:YVO4 laser of 3 × 3 × 10 mm rod and overall cavity length of 44 mm. To the best of our knowledge a self Q-switching effects was generated in Nd:YVO4 laser by changing the cavity dimensions and the position of the intracavity KTP crystal at certain regime of operation for the first time, in which the cavity length is reduced to be 30 mm and the distance between Nd:YVO4 rod and KTP crystal is only 1mm. Self Q-switched laser pulse at 532 nm with high peak power of 96 W, pulse width of 88 ns at FWHM and repetition rate of 400 kHz was achieved. Experimental studies of a passive Q-switched Nd:YVO4 laser using Cr:YAG crystal with three different transmissions of 30%, 40% and 70% were investigated. Passive Q-switched laser pulse at 1064 nm and narrow line width of less than 1.5 nm with highest peak power of nearly 18 kW, short pulse width of less than 4 ns at FWHM and higher repetition rate of 45 kHz using Cr:YAG with transmission of 30% was achieved for the first time.展开更多
文摘Mucotomy is one of the most frequently applied surgical techniques for the management of inferior turbinate hyperplasia. Mucotomy guarantees patent airway, however, it might lead to the emergence of sicca syndrome. In contrast, KTP (potassium titanyl phosphate) laser treatment spares the medial part of the inferior turbinate mucosa, contributing to maintenance of physiological nasal function. A retrospective comparative clinical study was performed to reveal the advantages and side-effects of both surgical methods in medium- and long-term in allergic rhinitis and non-allergic patients. Furthermore, we wished to determine the exact indications of the up-to-date laser treatment. Ninety-one of the 117 patients who underwent bilateral turbinate surgery during an 8-year period (2000-2007) responded to our questionnaire focusing on subjective postoperative changes. Patients were separated into 6 groups, based on the type of operation they underwent, the length of the follow-up and whether they suffered from allergies. The major complaint, nasal obstruction, improved in all 6 groups, which reached significance (p ? 0.05) in 4 groups. The most pronounced improvement was observed in the group of non-allergic patients with medium-term follow-up who underwent mucotomy. Nevertheless, a serious side- effect: crusting also increased significantly (p ? 0.05) in the latter group, while it was absent in allergic patients with medium-term follow-up, who underwent mucotomy. These results lead us to propose the following protocol for the treatment of inferior turbinate hyperplasia: 1) after unsuccessful conservative treatment, laser treatment is suggested for non-allergic patients;2) following unsuccessful conservative and even repeated laser treatment in the allergic group, mucotomy or turbinoplasty should be attempted.
文摘To explore the application of potassium titanyl phosphate （KTP） laser delivered via hronchofiherscope in the treatment of endohronchial tuberculosis. 36 patients with a diagnosis of endobronchial tuberculosis, with age ranging from 15 to 40 y were treated with KTP laser between Dec. 2002 and July 2004 （designated as treatment group）. The other 36 patients diagnosed as having endobronchial tuberculosis （aged 18 to 42 y, with a mean age of 33.5 y） without having received KTP laser treatment were included in a control group. Our results showed that the effective rates, in terms of recovery of bronchial lumen and cleanup of caseous necrotic mass were significantly higher in the treatment group 8 weeks after the treatment （P〈0.01）, and the healing rates of atelectasis and obstructive infection were also significantly higher in the treatment group （P〈0. 05 and P〈0.01）, but the incidence of complication after 8 weeks was no significant difference （P 〉0.05）. No significant changes were found in SaO2 and HR before, during and after the operation in the treatment group （P〉0.05）. It is concluded that KTP laser is an effective therapy for endobronchial tuberculosis.
文摘Diode end-pumped solid-state lasers have the potential to yield high quality laser beams with high efficiency for laser range finding and warning receiver applications as well as day and night military laser designation systems. In this paper we presents theoretical calculations using Advanced Dynamics Professional LASCAD software and experimental studies for a high power pigtailed fiber diode laser module of 8 W operating at 808 nm with a specially designed high efficiency cooling system, end pumped high-efficiency Nd:YVO4 laser of 3 × 3 × 10 mm rod and overall cavity length of 44 mm. To the best of our knowledge a self Q-switching effects was generated in Nd:YVO4 laser by changing the cavity dimensions and the position of the intracavity KTP crystal at certain regime of operation for the first time, in which the cavity length is reduced to be 30 mm and the distance between Nd:YVO4 rod and KTP crystal is only 1mm. Self Q-switched laser pulse at 532 nm with high peak power of 96 W, pulse width of 88 ns at FWHM and repetition rate of 400 kHz was achieved. Experimental studies of a passive Q-switched Nd:YVO4 laser using Cr:YAG crystal with three different transmissions of 30%, 40% and 70% were investigated. Passive Q-switched laser pulse at 1064 nm and narrow line width of less than 1.5 nm with highest peak power of nearly 18 kW, short pulse width of less than 4 ns at FWHM and higher repetition rate of 45 kHz using Cr:YAG with transmission of 30% was achieved for the first time.
