The body cavity of chicken under anesthesia was opened, and then the state of breathing and activities of air sac wal were observed. The results showed that, although the body cavity was opened, the chicken could stil...The body cavity of chicken under anesthesia was opened, and then the state of breathing and activities of air sac wal were observed. The results showed that, although the body cavity was opened, the chicken could stil breathe. When the chicken breathed in, the chest sidewal , thoracico-abdominal diaphragm and lung diaphragm al initiatively became larger, inflating the prethoracic and metathoracic air sacs; the cervical, clavicular and abdominal air sac wal s al contracted, shrinking the air sacs. When the chicken breathed out, the chest sidewal , thoracico-ab-dominal diaphragm and lung diaphragm initiatively contracted, shrinking the pretho-racic and metathoracic air sacs; the cervical, clavicular and abdominal air sac wal s al expanded, expanding the air sacs. Therefore, the chicken could stil breathe after the body cavity was opened. When the chicken breathed in, the prethoracic and metathoracic air sacs were al expanded, and the air flowed from the cervical, clav-icular and abdominal air sacs and respiratory tract to the prethoracic and metatho-racic air sacs through the lung, shrinking the cervical, clavicular and abdominal air sacs; when the chicken breathed out, the prethoracic and metathoracic air sacs wal s al contracted, and the air was extruded from the prethoracic and metathoracic air sacs into the cervical, clavicular and abdominal air sacs and respiratory tract trough the lung, expanding the cervical, clavicular and abdominal air sacs. During the entire breathing process, the prethoracic and metathoracic air sacs al can ex-pand and shrink initiatively, making the air flow though the lung.展开更多
Air flow in an avian lung was studied numerically to determine the effects of air sac compliance on flow in the parabronchi. In this preliminary study, the geometry of the avian respiratory system was simplified to ca...Air flow in an avian lung was studied numerically to determine the effects of air sac compliance on flow in the parabronchi. In this preliminary study, the geometry of the avian respiratory system was simplified to capture the characteristics of respiratory flow. The pressure fluctuation within air sacs caused by inflation and deflation was expressed by a lumped parameter model. The results demonstrate that the flow direction in the parabronchi varied, depending upon the compliance of the air sacs. A unidirectional flow in the parabronchi was achieved for compliances where pressure fluctuations in all air sacs were in phase. Air sac compliance significantly affected the pressures in the anterior and posterior air sacs and thus the pressure difference over the parabronchi that drove the flow in the parabronchi. These results address the importance of air sac compliance in the avian respiratory system and suggest that the compliance of air sacs would be optimized to accomplish unidirectional flow in the parabronchi.展开更多
目的：比较和观察2种不同的左侧双腔支气管导管从理想位置脱出时所产生的的压力变化。方法拟择期行胸科手术患者41例，年龄29～81岁，美国麻醉医师协会（American Society of Anesthesiologists，ASA）分级 I～Ⅲ级，随机将其分为2组：...目的：比较和观察2种不同的左侧双腔支气管导管从理想位置脱出时所产生的的压力变化。方法拟择期行胸科手术患者41例，年龄29～81岁，美国麻醉医师协会（American Society of Anesthesiologists，ASA）分级 I～Ⅲ级，随机将其分为2组：驼人双腔支气管导管组（T 组，n ＝21），Smith 双腔支气管导管组（B 组，n ＝20）。麻醉诱导后，T 组经口插入驼人医疗器械有限公司生产的普通型左侧双腔支气管导管，B 组经口插入相应型号的portex Blue line左侧双腔支气管导管。在纤维支气管镜辅助可视条件下令双腔支气管导管支气管气囊上边缘刚好位于隆突嵴下，此位置亦是此研究设计的0．0 cm 的位置。将指示气囊通过三通连接一次性压力传感器，随后通过三通向支气管气囊充入空气使支气管气囊压力达到30 cmH2 O，然后使导管以0．5 cm 单位向外回退，直至退至2．0 cm 位置并同时记录每一位置的支气管气囊压力。结果2组在2．0 cm 位置压力均低于初始压力（30 cmH2 O）（P ＜0．01）。在2组中，导管在0．0～2．0位置之间移动时，支气管气囊压力均表现出逐渐降低的趋势（P ＜0．01），且 B 组整体支气管气囊压力降低量和降低率大于 T 组（P ＜0．01）。结论2种双腔支气管导管从理想位置脱出时其支气管气囊压力均表现降低，B 组双腔管支气管导管气囊压力降低量和降低率均大于 T 组。展开更多
胃肠粘膜内 pH(p Hi)是监测胃肠粘膜血液供应和氧摄取的一项重要指标.因此近年来在危重病监测中应用较多.目前进口的胃肠粘膜内 p Hi 管价格昂贵,故在临床应用受到一定限制.为此,我们研制了一种与进口胃肠粘膜 pHi 测定管相配套的监测囊...胃肠粘膜内 pH(p Hi)是监测胃肠粘膜血液供应和氧摄取的一项重要指标.因此近年来在危重病监测中应用较多.目前进口的胃肠粘膜内 p Hi 管价格昂贵,故在临床应用受到一定限制.为此,我们研制了一种与进口胃肠粘膜 pHi 测定管相配套的监测囊,并与进口管在中国五指山小型猪和山羊失血性休克模型以及严重烧伤动物中进行了对比研究.展开更多
基金Supported by the Project Funded by Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)Natural Science Foundation of Yangzhou University(NK0313103)~~
文摘The body cavity of chicken under anesthesia was opened, and then the state of breathing and activities of air sac wal were observed. The results showed that, although the body cavity was opened, the chicken could stil breathe. When the chicken breathed in, the chest sidewal , thoracico-abdominal diaphragm and lung diaphragm al initiatively became larger, inflating the prethoracic and metathoracic air sacs; the cervical, clavicular and abdominal air sac wal s al contracted, shrinking the air sacs. When the chicken breathed out, the chest sidewal , thoracico-ab-dominal diaphragm and lung diaphragm initiatively contracted, shrinking the pretho-racic and metathoracic air sacs; the cervical, clavicular and abdominal air sac wal s al expanded, expanding the air sacs. Therefore, the chicken could stil breathe after the body cavity was opened. When the chicken breathed in, the prethoracic and metathoracic air sacs were al expanded, and the air flowed from the cervical, clav-icular and abdominal air sacs and respiratory tract to the prethoracic and metatho-racic air sacs through the lung, shrinking the cervical, clavicular and abdominal air sacs; when the chicken breathed out, the prethoracic and metathoracic air sacs wal s al contracted, and the air was extruded from the prethoracic and metathoracic air sacs into the cervical, clavicular and abdominal air sacs and respiratory tract trough the lung, expanding the cervical, clavicular and abdominal air sacs. During the entire breathing process, the prethoracic and metathoracic air sacs al can ex-pand and shrink initiatively, making the air flow though the lung.
文摘Air flow in an avian lung was studied numerically to determine the effects of air sac compliance on flow in the parabronchi. In this preliminary study, the geometry of the avian respiratory system was simplified to capture the characteristics of respiratory flow. The pressure fluctuation within air sacs caused by inflation and deflation was expressed by a lumped parameter model. The results demonstrate that the flow direction in the parabronchi varied, depending upon the compliance of the air sacs. A unidirectional flow in the parabronchi was achieved for compliances where pressure fluctuations in all air sacs were in phase. Air sac compliance significantly affected the pressures in the anterior and posterior air sacs and thus the pressure difference over the parabronchi that drove the flow in the parabronchi. These results address the importance of air sac compliance in the avian respiratory system and suggest that the compliance of air sacs would be optimized to accomplish unidirectional flow in the parabronchi.
文摘目的：比较和观察2种不同的左侧双腔支气管导管从理想位置脱出时所产生的的压力变化。方法拟择期行胸科手术患者41例，年龄29～81岁，美国麻醉医师协会（American Society of Anesthesiologists，ASA）分级 I～Ⅲ级，随机将其分为2组：驼人双腔支气管导管组（T 组，n ＝21），Smith 双腔支气管导管组（B 组，n ＝20）。麻醉诱导后，T 组经口插入驼人医疗器械有限公司生产的普通型左侧双腔支气管导管，B 组经口插入相应型号的portex Blue line左侧双腔支气管导管。在纤维支气管镜辅助可视条件下令双腔支气管导管支气管气囊上边缘刚好位于隆突嵴下，此位置亦是此研究设计的0．0 cm 的位置。将指示气囊通过三通连接一次性压力传感器，随后通过三通向支气管气囊充入空气使支气管气囊压力达到30 cmH2 O，然后使导管以0．5 cm 单位向外回退，直至退至2．0 cm 位置并同时记录每一位置的支气管气囊压力。结果2组在2．0 cm 位置压力均低于初始压力（30 cmH2 O）（P ＜0．01）。在2组中，导管在0．0～2．0位置之间移动时，支气管气囊压力均表现出逐渐降低的趋势（P ＜0．01），且 B 组整体支气管气囊压力降低量和降低率大于 T 组（P ＜0．01）。结论2种双腔支气管导管从理想位置脱出时其支气管气囊压力均表现降低，B 组双腔管支气管导管气囊压力降低量和降低率均大于 T 组。
文摘胃肠粘膜内 pH(p Hi)是监测胃肠粘膜血液供应和氧摄取的一项重要指标.因此近年来在危重病监测中应用较多.目前进口的胃肠粘膜内 p Hi 管价格昂贵,故在临床应用受到一定限制.为此,我们研制了一种与进口胃肠粘膜 pHi 测定管相配套的监测囊,并与进口管在中国五指山小型猪和山羊失血性休克模型以及严重烧伤动物中进行了对比研究.
