健康高海拔地区人的肺血管系统对铁输注有反应吗?

2021-10-06 刘少飞 MedSci原创

健康安第斯人的肺血管系统对铁输注有反应吗?

众所周知,在高海拔地区的夏尔巴人中,增加铁的生物利用度会减弱缺氧性肺血管收缩。相比之下,患有慢性高山病的安第斯人的肺血管系统对铁的给药有抵抗力。虽然肺血管重塑和高血压是慢性高山病的特征,但尚未研究铁剂对健康安第斯人的影响。如果健康安第斯人的铁状态和肺血管张力之间的相互作用保持不变,这可以提供有价值的临床洞察力,以了解铁在高海拔地区的调节作用。

本研究所关注的问题:健康安第斯人的肺血管系统对铁输注有反应吗?

研究设计和方法:

一项双盲、区组随机设计中,24 名健康的高海拔安第斯人和 22 名部分适应海拔 4300 m(Cerro de Pasco,秘鲁)的lowlander人接受了静脉注射。输注任何一种铁 [铁 (III)-氢氧化物蔗糖; 200mg]或生理盐水。在基线和输注后 4 小时收集铁状态的标志物。在室内空气呼吸 (PO=~96 mmHg) 和严重缺氧期间 (PO=~73 mmHg)、基线以及输注后 2 和 4 小时进行超声心动图检查。

研究结果:

在室内空气中,铁输注使肺动脉收缩压 (PASP) 降低了约 2.5 mmHg(主效应 P<0.001),并且在低地人和健康的安第斯高地人的过度缺氧期间降低了约 7 mmHg(主效应 P<0.001)。输注生理盐水后 PASP 没有变化。各组之间的铁指标具有可比性,但血清铁蛋白除外,与低地人相比,安第斯山脉基线时高 1.8 倍 [95% 置信区间 (CI) 74-121 ng/ml vs. 37-70 ng/ml,分别; P=0.003]。

研究启示:健康的安第斯人和lowlander人的肺血管系统对铁输注仍然敏感,这种反应似乎与慢性高山病的病理特征不同。

 

原文出处:

Patrician A. GLOBAL REACH 2018: Iron infusion at high altitude reduces hypoxic pulmonary vasoconstriction equally in both lowlanders and healthy Andean highlanders. Chest. 2021 Sep 8:S0012-3692(21)03848-4. DOI: 10.1016/j.chest.2021.08.075. Epub ahead of print. PMID: 34508740.

 

 

 

 

 

 

 

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    2022-02-08 zsyan
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    2021-10-06 查查佳佳

    那口味了阿菊

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