Lyot-type flat-top fibre multiwavelength filter based on polarisation-diversity loop structure

Micro & nano letters

article

Songhyun Jo¹  Kyoungsoo Park¹  Yong Wook Lee¹ 

[1] Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering, Pukyong National University;School of Electrical Engineering, Pukyong National University

关键词: optical fibre filters;    optical fibre polarisation;    optical switches;    optical beam splitters;    optical retarders;    Solc-type first-order multiwavelength filters;    zeroth-order multiwavelength filters;    passband bandwidths;    channel interleaving capability;    fibre coupler;    Lyot-Sagnac comb filter;    multiwavelength channels;    azimuthal orientation angles;    lossy flat-top band mode;    principal axes;    polarisation-maintaining fibre loops;    half-wave plates;    polarisation beam splitter;    multiwavelength switching;    lossy flat-top passbands;    polarisation-diversity loop structure;    Lyot-type flat-top fibre multiwavelength filter;   

DOI  :  10.1049/mnl.2014.0386

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Objective: Postoperative nausea and vomiting (PONV) is the most common postoperative complication among patients undergoing laparoscopic procedures, because of the formation of pneumoperitonium during laparoscopic procedures. A number of antiemetic drugs have been used to prevent PONV after laparoscopic cholecystectomy. In this study, we evaluated the safety and efficacy of ondansetron, cyclizine and prochlorperazine in preventing PONV in patients undergoing laparoscopic cholecystectomy (LC).Methodology: In this randomized single blinded controlled trial, we included 195 patients who underwent elective laparoscopic cholecystectomy having ASA status I or II. Selected patients were randomly divided into three equal groups of participants: Group O patients were given ondansetron (4 mg) for the prevention of PONV, Group C patients received cyclizine (50 mg), and Group P patients were given prochlorperazine (10 mg). All groups received their PONV drugs in identical 50 ml syringes. General anesthesia was given to all patients.Metoclopramide was used as a rescue antiemetic drug in all patients. Incidence of PONV within 24 hours, need of rescue anti-emetics and adverse effects e.g. headache, dizziness and sedation within 6 hours after surgery were the focused study outcomes.  Comparative analysis was done by Chi-square test or Fischer’s exact test as needed. ANOVA test was used to compare quantitative variables between the three groups. P < 0.05 was considered to be significant.

【 授权许可】

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