犬功能残气量与理想体质量之间的关系研究  被引量:1

The relationship between functional residual capacity and predicted body weight in dogs

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作  者:刘奇[1] 陈荣昌[2] 李雯[3] 曾庆思[3] 王欢[1] 贾留群[1] 郑惠[4] 程哲[1] 

机构地区:[1]郑州大学第一附属医院呼吸与重症科 河南省高等学校临床医学重点学科开放实验室,郑州450052 [2]广州医科大学第一附属医院呼吸疾病国家重点实验室 广州呼吸疾病研究所 [3] 广州医科大学第一附属医院放射科 [4] 郑州大学第一附属医院放射科

出  处:《中华急诊医学杂志》2015年第9期987-993,共7页Chinese Journal of Emergency Medicine

基  金:国家自然科学基金(81400051)

摘  要:目的 探讨健康犬及急性呼吸窘迫综合征(ARDS)犬模型功能残气量(FRC)与理想体质量的关系,为研究个体化的肺保护性通气方案奠定基础.方法 选取24只比格犬为研究对象,静脉注射0.18 mL/kg体质量的油酸,以动脉血气中氧分压与吸氧体积分数的比值(PaO2/FiO2)在100~200 mmHg之间作为中度ARDS模型的标准.造模前后行胸部CT测FRC,并检测动脉血气、血管外肺水指数、呼吸力学等相关参数,采用自身配对t检验.多元线性回归法分析造模前后肺功能残气量与理想体质量(以身长为指标)、月龄及实际体质量之间的关系.结果 造模后PaO2/FiO2从(472.4±58.9) mmHg降至(166.2±19.1) mmHg (P<0.01),血管外肺水指数由(11.0±1.9) mL/kg升至(25.7±7.9) mL/kg (P<0.01),静态呼吸系统顺应性由(30.5±4.1)L/cmH2O降至(21.2±4.9) L/cmH2O (P<0.01),静态肺顺应性由(48.7±9.3)L/cmH2O降至(29.7±7.2)L/cmH2O (P <0.01),犬FRC自(414±84) mL下降至(214±70) mL (P<0.01).对于健康犬,FRC的多元线性回归方程为FRC (mL) =21.86×月龄+20.55×身长(cm)-1337.98(P<0.05),而ARDS肺FRC与理想体质量、月龄及实际体质量之间的多元线性回归方程无效(P =0.305).结论 在健康犬,FRC与理想体质量之间成比例关系,但对于犬ARDS模型,FRC与理想体质量、年龄及实际体质量之间均不存在比例关系.在肺保护性通气选择潮气量时,应更多地关注ARDS患者实际的FRC而不仅仅是患者理想体质量.Objective To explore the relationship between functional residual capacity (FRC) and predicted body weight (PBW) in beagle dogs with and without acute respiratory distress syndrome (ARDS) in order to provide a rationale for individualized lung protective ventilation strategy.Methods Twenty-four adult male beagle dogs were injected with oleic acid (0.18 mL/kg) to make moderate acute respiratory distress syndrome models,the ratio of the partial pressure of oxygen in arterial blood to fraction of inhaled oxygen (PaO2/FiO2) between 100-200 mmHg was considered as a criterion of moderate ARDS.FRC was measured by chest computer tomography.Blood gas analysis,extra vascular lung water index and respiratory mechanics were tested before and after modeling.Hemodynamics and vital signs were monitored continuously throughout entire course of experiment.Age,body length as a surrogated PBW,and actual body weight were recorded before experiments.Results After modeling,PaO2/FiO2 decreased from (472.4 ± 58.9) mmHg to (166.2 ± 19.1) mmHg (P 〈 0.01),extra vascular lung water index increased abruptly from (11.0 ± 1.9) mL/kg to (25.7 ± 7.9) mL/kg (P 〈 0.01),static respiratory system compliance decreased from (30.5 ±4.1) L/cmH2O to (21.2 ±4.9) L/cmH2O (P 〈0.01) and static lung compliance reduced from (48.7 ± 9.3) L/cmH2O to (29.7 ± 7.2) L/cmH2O (P 〈 0.01).FRC decreased dramatically from (414 ± 84) mL to (214 ± 70) mL (P 〈 0.01).For healthy lungs,FRC can be estimated by the following formula:FRC (mL) =21.86× age (months) + 20.55× body length (cm)-1 337.98 (P 〈 0.05),while for injured lungs,the formula of multiple linear regression was invalid (P =0.305).Conclusions Functional residual capacity is proportional to PBW in healthy dogs but not in those with lung injury.To set tidal volume,more attention should be paid to the actual FRC or the ratio of tidal volume to FRC in addition to the ratio of tidal volume to P

关 键 词:功能残气量 理想体质量 肺应力 肺应变 急性呼吸窘迫综合征 潮气量 

分 类 号:R563.8[医药卫生—呼吸系统]

 

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