目的探讨5-HT3受体拮抗剂昂丹司琼在日间手术使用过程的安全性及其对术后24h内恶心、呕吐的预防效果。方法统计浙江大学医学院附属儿童医院2017年4月至2017年12月间2002例接受日间手术患儿术后24h内恶心、呕吐和其他并发症的发生情况,...目的探讨5-HT3受体拮抗剂昂丹司琼在日间手术使用过程的安全性及其对术后24h内恶心、呕吐的预防效果。方法统计浙江大学医学院附属儿童医院2017年4月至2017年12月间2002例接受日间手术患儿术后24h内恶心、呕吐和其他并发症的发生情况,根据是否预防性给予昂丹司琼分为昂丹司琼组(OND组)和对照组,评估昂丹司琼预防术后恶心呕吐(postoperative nausea and vomiting,PONV)的安全性和有效性,并对导致术后呕吐(postoperative vomiting,POV)的危险因素进行分析。结果OND组PONV和POV发生率明显低于对照组(PONV:5.4%vs.8.8%,P<0.05;POV:3.2%vs.6.8%,P<0.005)。就麻醉方式而言,昂丹司琼在基础麻醉复合局部浸润麻醉中对PONV/POV的预防作用比复合骶管神经阻滞的效果更好(PONV:OR=0.24,95%CI:0.113~0.508;POV:OR=0.207,95%CI:0.084~0.509)。就手术方式而言,昂丹司琼对POV的预防作用在鞘膜积液手术中最为理想(OR=0.067,95%CI:0.007~0.618,P=0.002)。采用基础麻醉复合骶管神经阻滞(RR=1.712,95%CI:1.097~2.672,P=0.017)、接受腹股沟斜疝手术(RR=1.946,95%CI:1.262~3.000,P=0.002)和男性(RR=1.829,95%CI:1.081~3.095,P=0.023)是导致术后POV的危险因素。结论昂丹司琼可有效降低日间手术患儿PONV和POV的发生率,加速患儿术后康复进程,增加就医舒适度。推荐在日间手术(尤其是下腹部腹股沟斜疝和鞘膜积液手术)患儿中使用昂丹司琼以预防PONV/POV。展开更多
Using the occurrence characteristics of bubble plumes in the South China Sea as a reference, this paper continues to study the seismic responses produced by bubble plumes in the cold seepage active region. To make the...Using the occurrence characteristics of bubble plumes in the South China Sea as a reference, this paper continues to study the seismic responses produced by bubble plumes in the cold seepage active region. To make the plume modelling scheme more reasonable, we modified the original modelling scheme and reconstructed a plume water body model based on the variation of its radius as bubbles rise in seawater. The plume seismic records of shot gathers were obtained by forward simulation. The seismic records of single shot show obvious characteristics of a scattering wave field and the periodic characteristics of the model. Seismic records of shot gathers were processed using prestack depth migration. The boundary of its imaging section has a good convergence effect. The migration sections can be imaged distinctly with higher accuracy. The aforementioned studies once again laid a foundation for the further study of the seismic responses produced by plumes. They also gradually probed a more suitable seismic data processing method for plumes and provided a theoretical guidance for the identification of plumes.展开更多
To study the bubble plume's seismic response characteristics,the model of a plume water body has been built in this article using the bubble-contained medium acoustic velocity model and the stochastic medium theor...To study the bubble plume's seismic response characteristics,the model of a plume water body has been built in this article using the bubble-contained medium acoustic velocity model and the stochastic medium theory based on an analysis of both the acoustic characteristics of a bubble-contained water body and the actual features of a plume.The finite difference method is used for forward modelling,and the single-shot seismic record exhibits the characteristics of a scattered wave field generated by a plume.A meaningful conclusion is obtained by extracting seismic attributes from the pre-stack shot gather record of a plume.The values of the amplitude-related seismic attributes increase greatly as the bubble content goes up,and changes in bubble radius will not cause seismic attributes to change,which is primarily observed because the bubble content has a strong impact on the plume's acoustic velocity,while the bubble radius has a weak impact on the acoustic velocity.The above conclusion provides a theoretical reference for identifying hydrate plumes using seismic methods and contributes to further study on hydrate decomposition and migration,as well as on distribution of the methane bubble in seawater.展开更多
To study the seismic responses produced by gas hydrate bubble plumes in the cold seepage active region, we constructed a plume water body model based on random medium theory and acoustic velocity model of bubble mediu...To study the seismic responses produced by gas hydrate bubble plumes in the cold seepage active region, we constructed a plume water body model based on random medium theory and acoustic velocity model of bubble medium. The plume water body model was forward simulated by finite difference. Seismic records of single shot show the scattered waves produced by the plume. The scattered wave energy is strong where the plume exists. Where the scattered wave energy is stronger, the minimum of travel time is always above the plume, which has no relationship with the shot's position. Seismic records of shot gathers were processed by prestack time migration. The migration section shows that the scattered waves produced by plumes can be imaged distinctly with higher accuracy. These researches laid a foundation for further study on the seismic responses produced by plumes and provided a new approach for the identification of gas hydrate.展开更多
文摘目的探讨5-HT3受体拮抗剂昂丹司琼在日间手术使用过程的安全性及其对术后24h内恶心、呕吐的预防效果。方法统计浙江大学医学院附属儿童医院2017年4月至2017年12月间2002例接受日间手术患儿术后24h内恶心、呕吐和其他并发症的发生情况,根据是否预防性给予昂丹司琼分为昂丹司琼组(OND组)和对照组,评估昂丹司琼预防术后恶心呕吐(postoperative nausea and vomiting,PONV)的安全性和有效性,并对导致术后呕吐(postoperative vomiting,POV)的危险因素进行分析。结果OND组PONV和POV发生率明显低于对照组(PONV:5.4%vs.8.8%,P<0.05;POV:3.2%vs.6.8%,P<0.005)。就麻醉方式而言,昂丹司琼在基础麻醉复合局部浸润麻醉中对PONV/POV的预防作用比复合骶管神经阻滞的效果更好(PONV:OR=0.24,95%CI:0.113~0.508;POV:OR=0.207,95%CI:0.084~0.509)。就手术方式而言,昂丹司琼对POV的预防作用在鞘膜积液手术中最为理想(OR=0.067,95%CI:0.007~0.618,P=0.002)。采用基础麻醉复合骶管神经阻滞(RR=1.712,95%CI:1.097~2.672,P=0.017)、接受腹股沟斜疝手术(RR=1.946,95%CI:1.262~3.000,P=0.002)和男性(RR=1.829,95%CI:1.081~3.095,P=0.023)是导致术后POV的危险因素。结论昂丹司琼可有效降低日间手术患儿PONV和POV的发生率,加速患儿术后康复进程,增加就医舒适度。推荐在日间手术(尤其是下腹部腹股沟斜疝和鞘膜积液手术)患儿中使用昂丹司琼以预防PONV/POV。
基金The National Natural Science Foundation under contract No.41306050the Science and Technology Project of Guangdong Province under contract No.2014A010103030+1 种基金the Natural Science Foundation of Guangdong Province under contract No.2015A030313617the National Marine Important Charity Special Foundation under contract No.201305019
文摘Using the occurrence characteristics of bubble plumes in the South China Sea as a reference, this paper continues to study the seismic responses produced by bubble plumes in the cold seepage active region. To make the plume modelling scheme more reasonable, we modified the original modelling scheme and reconstructed a plume water body model based on the variation of its radius as bubbles rise in seawater. The plume seismic records of shot gathers were obtained by forward simulation. The seismic records of single shot show obvious characteristics of a scattering wave field and the periodic characteristics of the model. Seismic records of shot gathers were processed using prestack depth migration. The boundary of its imaging section has a good convergence effect. The migration sections can be imaged distinctly with higher accuracy. The aforementioned studies once again laid a foundation for the further study of the seismic responses produced by plumes. They also gradually probed a more suitable seismic data processing method for plumes and provided a theoretical guidance for the identification of plumes.
基金financially supported by the National Natural Science Foundation of China(No.41306050)the Science and Technology Project of Guangdong Province of China(No.2014A010103030)+1 种基金the Natural Science Foundation of Guangdong Province under contract(No.2015A030313617)the National Marine Important Charity Special Foundation of China(No.201305019)
文摘To study the bubble plume's seismic response characteristics,the model of a plume water body has been built in this article using the bubble-contained medium acoustic velocity model and the stochastic medium theory based on an analysis of both the acoustic characteristics of a bubble-contained water body and the actual features of a plume.The finite difference method is used for forward modelling,and the single-shot seismic record exhibits the characteristics of a scattered wave field generated by a plume.A meaningful conclusion is obtained by extracting seismic attributes from the pre-stack shot gather record of a plume.The values of the amplitude-related seismic attributes increase greatly as the bubble content goes up,and changes in bubble radius will not cause seismic attributes to change,which is primarily observed because the bubble content has a strong impact on the plume's acoustic velocity,while the bubble radius has a weak impact on the acoustic velocity.The above conclusion provides a theoretical reference for identifying hydrate plumes using seismic methods and contributes to further study on hydrate decomposition and migration,as well as on distribution of the methane bubble in seawater.
基金supported by National Basic Research Program of China(Grant No. 2009CB219505)Program for Science and Technology Development of Zhanjiang (Grant No. 2011C3107006)the Talents Introduction Special Project of Guangdong Ocean University (Grant No. 0812182)
文摘To study the seismic responses produced by gas hydrate bubble plumes in the cold seepage active region, we constructed a plume water body model based on random medium theory and acoustic velocity model of bubble medium. The plume water body model was forward simulated by finite difference. Seismic records of single shot show the scattered waves produced by the plume. The scattered wave energy is strong where the plume exists. Where the scattered wave energy is stronger, the minimum of travel time is always above the plume, which has no relationship with the shot's position. Seismic records of shot gathers were processed by prestack time migration. The migration section shows that the scattered waves produced by plumes can be imaged distinctly with higher accuracy. These researches laid a foundation for further study on the seismic responses produced by plumes and provided a new approach for the identification of gas hydrate.
