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小核桃小銀蟲 (初入文壇)
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[求助]
重金求助!急啊
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Conclusions The current pathophysiologic scenario of ARDS includes ventilator-induced lung injury as a factor that can worsen the severity of the syndrome. The literature reviewed above documents that spontaneous or mechanical ventilation of normal lungs alters surfactant and increases surface tension, that increased surface tension is necessary and sufficient to cause atelectasis, that atelectasis is augmented by supine positioning and sedation, that constant VT ventilation limits surfactant release from type II pneumocytes and that changes in surfactant occur prior to the onset of ARDS. These findings suggest a new pathophysiologic scenario for ARDS, one in which normal lung regions become atelectatic from the increase in surface tension resulting from spontaneous or mechanical ventilation-induced decreases in surfactant, together with our current approaches to patient positioning and sedation. Spontaneous or mechanical ventilation of these atelectatic regions then causes the initial lung injury via atelectrauma. If the proposed scenario were correct at least some instances of ARDS might be prevented by routinely administering sigh breaths in addition to ventilating with low VTs and at least low levels of PEEP, by avoiding supine positioning, by increasinthe frequency of repositioning and the use of prone or semi-prone positioning, by limiting the use of sedation, and by implementing these changes in practice from the time patients are admitted and/or mechanical ventilation is initiated rather than waiti until ARDS has developed. Although these ideas are supported by considerable literature, they remain hypotheses that require testing in patients at risk for ARDS. |

至尊木蟲 (職業(yè)作家)
金蟲 (正式寫手)
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用有道翻譯,雖然不太標(biāo)準(zhǔn),但是你稍微改一下就好了 結(jié)論 當(dāng)前的病理生理的場景包括通風(fēng)機誘導(dǎo)肺的ARDS 受傷是一個因素,可以進一步惡化的嚴(yán)重性綜合癥。一文獻回顧上述文件,自發(fā)或機械通風(fēng)的正常肺改變表面活性劑和增加表面張力,提高表面張力是必要的,足以引起肺不張、肺不張,增強了懶散的定位和鎮(zhèn)靜,常數(shù)VT通風(fēng)限制表面活性劑從II型pneumocytes釋放,改變發(fā)生在表面活性劑爆發(fā)之前,ARDS。這些發(fā)現(xiàn)提出了一個新的ARDS病理生理的場景,一個正常的肺萎陷地區(qū)成為從增加的表面張力源于自發(fā)或機械通氣誘導(dǎo)減少表面活性劑,連同我們當(dāng)前的方法來定位和鎮(zhèn)靜病人。自發(fā)或機械通風(fēng)的這些萎陷地區(qū)然后導(dǎo)致最初通過atelectrauma肺損傷。如果提出的場景是正確的,至少一些實例可以預(yù)防的ARDS通過定期 管理嘆息呼吸除了通風(fēng)與低變形機和至少低水平的窺視,通過避免仰臥的定位,通過increasinthe頻率的重新定位和使用容易或半容易定位,通過限制使用鎮(zhèn)靜,通過實現(xiàn)這些變化實際上從病人承認(rèn)和/或機械通風(fēng)啟動而不是waiti直到ARDS已經(jīng)開發(fā)了。雖然這些想法都支持相當(dāng)大的文學(xué),他們?nèi)匀恍枰獪y試假設(shè)在危險的患者ARDS。 |

榮譽版主 (文壇精英)
有愛的二哥
| 目前ARDS的生理病理情況包括人工呼吸器造成的肺部損傷,肺部損傷又能進一步加重綜合癥病情。根據(jù)以上文獻報道,正常肺部的自發(fā)呼吸以及機械通氣可改變肺部表面作用劑并增加表面張力,當(dāng)表面張力存在并到達(dá)一定程度后就會引起肺萎縮,同時,在仰臥定位狀態(tài)下注射鎮(zhèn)定劑也可引起肺萎縮。 保持空氣持續(xù)流通可減、蛐头闻菁(xì)胞表面作用劑的釋放并在ARDS發(fā)病前使表面作用劑發(fā)生變化。綜合以上結(jié)果,再結(jié)合我們目前的研究思路——即對病人在仰臥定位下注射鎮(zhèn)定劑,揭示了ARDS一種新的病理生理情況,自發(fā)呼吸或機械呼吸可導(dǎo)致肺泡細(xì)胞表面作用劑的減少,表面作用劑的減少導(dǎo)致表面張力的增加,表面張力的增加導(dǎo)致正常肺區(qū)的萎縮。 對肺不張區(qū)域進行自發(fā)或機械通氣引起的剪切力作用是造成肺損傷的最初原因。如上述情況在某種程度上正確,除了采用低速VTs和最低速PEEP使空氣流動外,通過采用呼吸方式也可能預(yù)防ARDS,如避免仰臥,增加復(fù)位頻率并采用俯臥或半俯臥方式、補充減少鎮(zhèn)定劑的使用,補充經(jīng)確診的或和開始進行機械呼吸的病人的臨床變化情況,而不是坐等ARDS的發(fā)生。盡管以上觀點有文獻支持,但仍為猜測,需進一步進行臨床實驗證明。 |
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Conclusions 結(jié)論 The current pathophysiologic scenario of ARDS includes ventilator-induced lung injury as a factor that can worsen the severity of the syndrome. 目前急性呼吸窘迫綜合征(ARDS)的病理情況包括呼吸機相關(guān)性肺損傷,這種損失能造成并發(fā)癥狀的惡化。 The literature reviewed above documents that spontaneous or mechanical ventilation of normal lungs alters surfactant and increases surface tension, that increased surface tension is necessary and sufficient to cause atelectasis, that atelectasis is augmented by supine positioning and sedation, that constant VT ventilation limits surfactant release from type II pneumocytes and that changes in surfactant occur prior to the onset of ARDS. 回顧上述文獻得出,正常肺的自發(fā)或者機械通風(fēng)能改變肺表面活性物質(zhì)或者改變表面張力,肺表面張力的增強足以導(dǎo)致肺不張,仰臥位或者鎮(zhèn)靜狀態(tài)肺不張癥狀加劇,持續(xù)的潮氣量限制了表面活性物質(zhì)從肺泡的二型肺細(xì)胞中釋放,以及肺表面活性物質(zhì)的改變通常發(fā)生在ARDS發(fā)作之前。 These findings suggest a new pathophysiologic scenario for ARDS, one in which normal lung regions become atelectatic from the increase in surface tension resulting from spontaneous or mechanical ventilation-induced decreases in surfactant, together with our current approaches to patient positioning and sedation. 這些發(fā)現(xiàn)給ARDS提供了一種新的病理可能情況,即由于自發(fā)或機械通風(fēng)引發(fā)的肺表面活性物質(zhì)的減少以及我們目前正在研究的病人位置和鎮(zhèn)靜狀態(tài),使得肺表面張力增大,最終導(dǎo)致正常肺部區(qū)域的膨脹不全。 Spontaneous or mechanical ventilation of these atelectatic regions then causes the initial lung injury via atelectrauma. 之后,這些肺不張區(qū)域自發(fā)的或者機械通風(fēng)經(jīng)由“肺萎陷傷”(不張傷)導(dǎo)致最初的肺損傷。 If the proposed scenario were correct at least some instances of ARDS might be prevented by routinely administering sigh breaths in addition to ventilating with low VTs and at least low levels of PEEP, by avoiding supine positioning, by increasing the frequency of repositioning and the use of prone or semi-prone positioning, by limiting the use of sedation, and by implementing these changes in practice from the time patients are admitted and/or mechanical ventilation is initiated rather than waiting until ARDS has developed. 如果上述提出的病例場景是正確的,除了通過低潮氣量通風(fēng)和低呼氣末正壓,通過定期的管理嘆吸氣頻率,通過避免仰臥位,增加換位頻率和俯臥或半俯臥的置位,通過限制出現(xiàn)鎮(zhèn)靜狀況,以及在病人確診之后或者機械通風(fēng)已經(jīng)引起時而不是在等到ARDS發(fā)作之時,實施這些改變, 那么至少一些ARDS的實例可以得到阻止 Although these ideas are supported by considerable literature, they remain hypotheses that require testing in patients at risk for ARDS. 盡管這些想法得到很多文獻支持,但仍屬于臆測,需要通過在出于ARDS狀況的病人身上進行測試驗證。 |

木蟲 (正式寫手)
| 目前ARDS的生理病理機制涵蓋了呼吸機相關(guān)性肺損傷,肺損傷又能進一步加重ARDS。自主或者機械通氣可改變正常肺的表面活性物質(zhì)并增加肺泡表面張力,當(dāng)肺泡表面張力存在并到達(dá)一定程度后就會引起肺萎陷;在仰臥位狀態(tài)下注射鎮(zhèn)定劑也可引起肺萎陷;恒定的潮氣量限制了表面活性物質(zhì)從Ⅱ型肺泡細(xì)胞釋放,并且在ARDS之前就已發(fā)生此種改變。綜合以上結(jié)果,再結(jié)合我們目前的研究思路,揭示了ARDS一種新的病理生理情況,由于ICU或EICU對于病人的體位的限制及鎮(zhèn)靜藥物的使用,增加了肺泡表面張力,繼而導(dǎo)致了正常的肺萎陷。在這些肺萎陷的區(qū)域,自主或者機械通氣導(dǎo)致的不張傷是造成肺損傷的最初原因。如果現(xiàn)實中的情況正如Albert RK等人預(yù)測的那樣,除了采用常規(guī)的嘆息方式,低潮氣量和低水平PEEP使空氣流動外,患者應(yīng)避免仰臥,增加翻身的頻率并采用俯臥或半俯臥方式,減少鎮(zhèn)定劑的使用,一經(jīng)確診的和/或開始進行機械通氣的病人應(yīng)立即采用以上措施,而不是坐以待斃。該設(shè)想的與臨床呼吸機應(yīng)用患者的實際情況的一致性仍有待進一步進行臨床實驗證明。 |
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