scholarly journals Minimally Invasive Management of Iatrogenic Ureteral Injuries with Ureteroscope Facilitated by Holmium Yttrium-Aluminum-Garnet Laser

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Zongyao Hao ◽  
Li Zhang ◽  
Jun Zhou ◽  
Xiansheng Zhang ◽  
Haoqiang Shi ◽  
...  
Keyword(s):  
Yttrium Aluminum Garnet ◽  
High Rate ◽  
Surgical Approaches ◽  
Ho:Yag Laser ◽  
Minimal Scarring ◽  
Novel Approach ◽  
Ureteral Injuries ◽  
Yttrium Aluminum ◽  
Invasive Management

The ureter is vulnerable during general, gynecologic, and urologic surgeries. The traditional open surgical approaches to treating the iatrogenic ureteral injuries have shown several disadvantages such as relatively high rate of severe complications. Although the applications of endourological techniques for management of lower ureteral strictures have been routinely introduced over the last 10 years, most of the different modalities were based on the utilization of hydrophilic instruments that can facilitate the traversal of strictures surrounded by the sutures with gradually increasing force. Interestingly, we have revealed the Ho:YAG laser as the outstanding auxiliary approach to incising the sutures during the ureteroscopy for its well-controlled penetration depth, minimal scarring, and precise cutting. As far as we know, the combined utilization of Ho:YAG laser to incise the sutures responsible for the strictures and double J ureteral stent for drainage has not been extensively reported. Normal ureters of the patients managed by this novel approach were shown by the follow-up 3-4 months later, which demonstrated that the available technique was promising to effectively treat the iatrogenic ureteral injuries.

scholarly journals Feasibility and long-term safety of Ho:YAG laser lithotripsy in broncholithiasis patients

2020 ◽  
Author(s):  
Yuan Cheng ◽  
Guangfa Wang ◽  
Wei Zhang ◽  
Hong Zhang ◽  
Xi Wang
Keyword(s):  
Pulse Energy ◽  
Yttrium Aluminum Garnet ◽  
Pulse Frequency ◽  
Laser Lithotripsy ◽  
Rigid Bronchoscopy ◽  
Ho:Yag Laser ◽  
Yttrium Aluminum ◽  
Long Term Follow Up

Abstract Background: Treatment of broncholithiasis is complex, especially in the case of a large or transbronchial broncholith. Holmium-yttrium aluminum garnet (Ho:YAG) laser lithotripsy may be a useful treatment in broncholithiasis; however, as it is not yet common practice, the optimal parameters are unknown. Methods: We performed a single-center retrospective analysis of the clinical data of 13 broncholithiasis patients who underwent Ho:YAG laser lithotripsy from May 2012 to October 2018. Results: For the 13 patients (2 males and 11 females), Ho:YAG laser lithotripsy was performed 17 times, in total. All procedures were performed under general anesthesia with rigid bronchoscopy. We initially set the Ho:YAG laser to a pulse frequency of 5 Hz and a pulse energy of 0.8 J, gradually increasing these as required. The pulse frequency range we employed was 5-15 Hz, and the pulse energy range was 0.8-1.6 J. All broncholiths were successfully extracted after lithotripsy, and all symptoms improved. Hemoptysis, bronchial esophageal fistula, and pneumonia were the most common complications; however, there were no long-term complications. Conclusions: Ho:YAG laser lithotripsy is an effective and safe treatment for broncholithiasis, over a long-term follow up.

scholarly journals Feasibility and Long-Term Safety of Ho:YAG Laser Lithotripsy in Broncholithiasis Patients

2020 ◽  
Author(s):  
Yuan Cheng ◽  
Guangfa Wang ◽  
Wei Zhang ◽  
Hong Zhang ◽  
Xi Wang
Keyword(s):  
Pulse Energy ◽  
Yttrium Aluminum Garnet ◽  
Pulse Frequency ◽  
Laser Lithotripsy ◽  
Rigid Bronchoscopy ◽  
Ho:Yag Laser ◽  
Yttrium Aluminum ◽  
Long Term Follow Up

Abstract Background Treatment of broncholithiasis is complex, especially in the case of a large or transbronchial broncholith. Holmium-yttrium aluminum garnet (Ho:YAG) laser lithotripsy may be a useful treatment in broncholithiasis; however, as it is not yet common practice, the optimal parameters are unknown.Objectives We investigated the feasibility and long-term safety of Ho:YAG lithotripsy in broncholithiasis patients.Method We performed a single-center retrospective analysis of the clinical data of 13 broncholithiasis patients who underwent Ho:YAG laser lithotripsy from May 2012 to October 2018.Result For the 13 patients (2 males and 11 females), Ho:YAG laser lithotripsy was performed 17 times, in total. All procedures were performed under general anesthesia with rigid bronchoscopy. We initially set the Ho:YAG laser to a pulse frequency of 5 Hz and a pulse energy of 0.8 J, gradually increasing these as required. The pulse frequency range we employed was 5-15 Hz, and the pulse energy range was 0.8-1.6 J. All broncholiths were successfully extracted after lithotripsy, and all symptoms improved. Hemoptysis, bronchial esophageal fistula, and pneumonia were the most common complications; however, there were no long-term complications.Conclusions Ho:YAG laser lithotripsy is an effective and safe treatment for broncholithiasis, over a long-term follow up.

scholarly journals Feasibility and long-term safety of Ho:YAG laser lithotripsy in broncholithiasis patients

2020 ◽  
Author(s):  
Yuan Cheng ◽  
Guangfa Wang ◽  
Wei Zhang ◽  
Hong Zhang ◽  
Xi Wang
Keyword(s):  
Pulse Energy ◽  
Yttrium Aluminum Garnet ◽  
Pulse Frequency ◽  
Laser Lithotripsy ◽  
Rigid Bronchoscopy ◽  
Ho:Yag Laser ◽  
Yttrium Aluminum ◽  
Long Term Follow Up

Abstract BackgroundTreatment of broncholithiasis is complex, especially in the case of a large or transbronchial broncholith. Holmium-yttrium aluminum garnet (Ho:YAG) laser lithotripsy may be a useful treatment in broncholithiasis; however, as it is not yet common practice, the optimal parameters are unknown. MethodsWe performed a single-center retrospective analysis of the clinical data of 13 broncholithiasis patients who underwent Ho:YAG laser lithotripsy from May 2012 to October 2018.ResultsFor the 13 patients (2 males and 11 females), Ho:YAG laser lithotripsy was performed 17 times, in total. All procedures were performed under general anesthesia with rigid bronchoscopy. We initially set the Ho:YAG laser to a pulse frequency of 5 Hz and a pulse energy of 0.8 J, gradually increasing these as required. The pulse frequency range we employed was 5-15 Hz, and the pulse energy range was 0.8-1.6 J. All broncholiths were successfully extracted after lithotripsy, and all symptoms improved. Hemoptysis, bronchial esophageal fistula, and pneumonia were the most common complications; however, there were no long-term complications.ConclusionsHo:YAG laser lithotripsy is an effective and safe treatment for broncholithiasis, over a long-term follow up.

scholarly journals Feasibility and long-term safety of Ho:YAG laser lithotripsy in broncholithiasis patients

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yuan Cheng ◽  
Guangfa Wang ◽  
Wei Zhang ◽  
Hong Zhang ◽  
Xi Wang
Keyword(s):  
Pulse Energy ◽  
Yttrium Aluminum Garnet ◽  
Pulse Frequency ◽  
Laser Lithotripsy ◽  
Rigid Bronchoscopy ◽  
Ho:Yag Laser ◽  
Yttrium Aluminum ◽  
Long Term Follow Up

Abstract Background Treatment of broncholithiasis is complex, especially in the case of a large or transbronchial broncholith. Holmium-yttrium aluminum garnet (Ho:YAG) laser lithotripsy may be a useful treatment in broncholithiasis; however, as it is not yet common practice, the optimal parameters are unknown. Methods We performed a single-center retrospective analysis of the clinical data of 13 broncholithiasis patients who underwent Ho:YAG laser lithotripsy from May 2012 to October 2018. Results For the 13 patients (2 males and 11 females), Ho:YAG laser lithotripsy was performed 17 times, in total. All procedures were performed under general anesthesia with rigid bronchoscopy. We initially set the Ho:YAG laser to a pulse frequency of 5 Hz and a pulse energy of 0.8 J, gradually increasing these as required. The pulse frequency range we employed was 5–15 Hz, and the pulse energy range was 0.8–1.6 J. All broncholiths were successfully extracted after lithotripsy, and all symptoms improved. Hemoptysis, bronchial esophageal fistula, and pneumonia were the most common complications; however, there were no long-term complications. Conclusions Ho:YAG laser lithotripsy is an effective and safe treatment for broncholithiasis, over a long-term follow up.

scholarly journals Anterior Capsule Opening Contraction and Late Intraocular Lens Dislocation after Cataract Surgery in Patients with Weak or Partially Absent Zonular Support

Medicina ◽  
2021 ◽  
Vol 57 (1) ◽  
pp. 35
Author(s):  
Juris Vanags ◽  
Renārs Erts ◽  
Guna Laganovska
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Yttrium Aluminum Garnet ◽  
Late Complications ◽  
High Rate ◽  
Anterior Capsule ◽  
Capsular Tension Ring ◽  
Hydrophobic Acrylic ◽  
Capsular Bag

Background and objectives: To evaluate anterior capsule opening (ACO) contraction and late intraocular lens (IOL) dislocation after cataract surgery in patients with weak or partially absent zonular support and assess methods of reducing these complications. Materials and methods: For this prospective study, we enlisted cataract surgery patients in our hospital with preoperative diagnoses of weak zonules. All patients received phacoemulsification surgery with implantation of a hydrophobic acrylic IOL and capsular tension ring (CTR). ACO reductions were measured for six months after enrolment. Data on late IOL dislocations were collected five years after enrolment of the last patient. Results: Fifty-three patients were enrolled from 2011 to 2015. Over the six-month active follow-up period, ACO area reduction was 23% in patients receiving CTRs of 11 mm diameter and 8% for patients with CTRs of 12 mm, with an overall mean of 15% reduction. Five years after the last patient was enrolled, seven patients (13%) had experienced late IOL-CTR-capsular bag dislocation. For these patients, the mean ACO reduction in the first six months of follow-up was 33%, including for those who had received neodymium-doped yttrium aluminum garnet (Nd: YAG) anterior capsulotomies. Conclusion: Use of hydrophobic acrylic lenses and CTR reduces ACO contraction, with rates comparable to those after cataract surgery without ocular comorbidity. Our patients experienced a relatively high rate of late IOL-CTR-capsular bag dislocation. However, dislocated complexes were easily repositioned and few patients required IOL exchange. Frequent visits are warranted to promptly detect late complications of cataract surgery in patients with weak zonular support.

scholarly journals Holmium: yttrium-aluminum-garnet (Ho:YAG) laser for resection of bladder tumor in a pediatric patient

2015 ◽  
Vol 2 (5) ◽  
pp. 10-10
Author(s):  
Suleyman Cakmakci Cakmakci ◽  
Necmettin Penbegul ◽  
Mehmet Mazhar Utangac ◽  
Mansur Daggulli ◽  
Onur Dede ◽  
...  
Keyword(s):  
Pediatric Patient ◽  
Bladder Tumor ◽  
Yttrium Aluminum Garnet ◽  
Ho:Yag Laser ◽  
Yttrium Aluminum

scholarly journals Clinical Study of Pingyangmycin Combined with Nd:YAG Laser to Treat Venous Malformations in the Oral and Maxillofacial Region

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Yongsheng Li
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Yttrium Aluminum Garnet ◽  
Control Group ◽  
Venous Malformations ◽  
Maxillofacial Region ◽  
Yttrium Aluminum ◽  
Oral And Maxillofacial Region ◽  
Experimental Group

Purpose: To explore the efficacy of pingyangmycin (PYM) combined with Neodymium yttrium aluminum garnet (Nd:YAG) laser to treat venous malformations in the oral and maxillofacial region. Methods: Eighty-six patients were randomly divided into two groups. Forty-two patients were allocated to the experimental group and were injected with PYM at the lesion site, followed by Nd:YAG laser irradiation two days later. Forty-four patients were allocated to the control group and received only Nd:YAG laser irradiation (15-30W of power). All patients came back for a follow-up examination one month later. Results: Twenty-eight patients in the experimental group (66.67%) and 16 patients in the control group (36.31%) had no lesions after one treatment. Additionally, 10 patients in the experimental group (23.81%) and nine patients in the control group (20.45%) showed significant improvement at one month post-treatment. Compared to the control group, the experimental group demonstrated superior outcomes and shorter treatment durations. The between-group difference was significant (p<0.05). Conclusion: PYM combined with Nd:YAG laser is an effective treatment of venous malformations in the oral and maxillofacial region, potentially shortening treatment durations.

scholarly journals Luminescence efficiency of cerium-doped yttrium aluminum garnet ceramics formed by radiation assisted synthesis

2021 ◽  
Vol 6 (6 (114)) ◽  
Author(s):  
Gulnur Alpyssova ◽  
Victor Lisitsyn ◽  
Mikhail Golkovski ◽  
Dossymkhan Mussakhanov ◽  
Zhakyp Karipbayev ◽  
...  
Keyword(s):  
Yttrium Aluminum Garnet ◽  
Structural Phase ◽  
Spectral Characteristics ◽  
Statistical Processing ◽  
Luminescent Properties ◽  
High Rate ◽  
Kinetic Properties ◽  
Radiation Synthesis ◽  
Luminescence Efficiency ◽  
Yttrium Aluminum

The variety of applications of yttrium-aluminum garnet (YAG)-based luminescent materials and the morphology necessary for these purposes required the development of many technologies for their synthesis. All synthesis technologies used are complex. The structural phase of yttrium-aluminum garnet is formed with any technology, at temperatures exceeding 1,500 °C. The starting materials for the synthesis are metal oxides of aluminum, yttrium and other oxides for activation and modification. It seems possible to use hard radiation to form a new phase. Radiation synthesis of ceramics is realized in less than 1 s, without the use of any additives and influences. The synthesis was carried out at the electron accelerator of the Institute of Nuclear Physics (Novosibirsk). In this work, we studied the spectral-kinetic and quantitative characteristics of luminescence for the first time obtained by the method of radiation synthesis of ceramic samples of yttrium-aluminum garnet doped with cerium with statistical processing of their values. The dependences of the reproducibility of the spectral characteristics of the luminescence of the samples on the preliminary preparation of the charge for synthesis have been investigated. Several cycles of luminophore brightness studies have been performed. It is shown that the obtained ceramics based on yttrium-aluminum garnet doped with cerium possesses the required spectral-kinetic properties, and the efficiency of conversion of the chip radiation into luminescence is achieved, which is comparable to that available in commercial phosphors. The maximum measured values of the position of the bands are from 553.5 to 559.6 nm. Brightness values range from 4,720 to 1,960 cd/m2. It was found that the main reason for the scatter in the characteristics of the luminescent properties of ceramics of yttrium-aluminum garnet, activated by cerium obtained by radiation assisted synthesis is the high rate of synthesis and, especially, the high rate of cooling of the samples.

Nd:YAG Adhesiolysis: A Novel Approach to Tractional Retinal Detachment From Beyond-the-Edge Proliferation After Retinectomy

2018 ◽  
Vol 2 (6) ◽  
pp. 374-378
Author(s):  
Ross Chod ◽  
Gennady Landa ◽  
Richard Rosen
Keyword(s):  
Nd:Yag Laser ◽  
Yttrium Aluminum Garnet ◽  
Adhesion Formation ◽  
Subretinal Fluid ◽  
Argon Laser ◽  
Tractional Retinal Detachment ◽  
Band Formation ◽  
Novel Approach ◽  
Yttrium Aluminum ◽  
Tractional Forces

Retinectomy can be complicated by recurrent retinal elevation and subretinal fluid (SRF) accumulation secondary to tractional chorioretinal adhesion band formation and contraction. Classically, this complication requires repeat vitrectomy with destruction of adhesion bands using the vitrectomy instrument. We present a novel, nonoperative technique utilizing neodymium-yttrium-aluminum-garnet (Nd:YAG) laser to address tractional retinal elevation of a retinectomy edge causing SRF accumulation secondary to peripheral chorioretinal adhesion formation after retinectomy. Nd:YAG laser was used to perform targeted adhesiolysis to release the tractional forces on the retina, after which argon laser retinopexy was performed. Retinal reattachment with resolution of SRF was achieved without the need for reoperation.

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