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      高海拔地區喝富氧水能緩解缺氧嗎?

      時間: 2019-08-02      來源: 人民網-科普中國      趙學勤



      到一些高海拔地區旅游的時候,我們總能看到瓶裝或袋裝的富氧水。很多人都認為富氧水是可以喝的溶解氧,能迅速解決高原反應,緩解缺氧癥狀。它真的有這樣神奇的效果嗎?

      到底什么是富氧水呢?普通水每升含氧量在4~6毫克,富氧水將高純度醫用氧與優質純凈水融合在一起,每升富氧水中氧含量大于或者等于35毫克,是普通水含氧量的6~10倍,因此被稱為富氧水。

      高原低壓缺氧的環境會引起人體一系列的反應,比如感到胸悶氣短、心跳加快,嚴重的話會發展成病理性癥狀。如果人體補足氧氣,這些癥狀就會得到緩解。我國高原部隊長期駐守高原地區,擔負著戍守邊防的重任。那么,該如何解決戰士們的高原反應,讓他們保持良好的體能狀態呢?

      我國高原部隊的醫務工作者很早就在關注富氧水的研究。經過大量實驗得出結論,富氧水易吸收、起效快、預防急性高原病效果好。口服富氧水可緩解低氧血癥,有改善機體的缺氧癥狀、增加機體運動能力、提高心臟耐缺氧和抗疲勞作用。

      人體靠呼吸系統獲得氧氣,那么為什么喝富氧水能補氧呢?

      通常,人體吸收氧氣有兩個途徑,一個是通過呼吸系統,另一個是通過消化系統。富氧水進入消化道后,高濃度的溶解氧可以被胃和小腸快速吸收,水里的氧氣直接被輸送到血液當中,通過血液循環輸送到全身,從而增強了全身各器官的活性,減輕了人體呼吸系統的壓力。

      由此看來,富氧水溶解氧的穩定性好,可以提高血液中的含氧量,緩解人們的缺氧反應,沒有任何毒副作用。在平原地區經常飲用富氧水,可以解除疲勞、延緩推遲老化,適合腦力工作者、老人、婦女和兒童。

      富氧水氧含量畢竟有限,那么,直接喝液化的純氧是不是更有利于解決高原缺氧的問題呢?答案是否定的。液氧雖然是液體,但是無法飲用,它必須儲存在低溫密閉的鋼瓶中。在通常情況下,液氧的沸點極低,為-183℃。當液氧發生“跑冒滴漏”時,一旦噴濺到的人的皮膚上就會迅速汽化,吸收大量的熱量,導致皮膚嚴重凍傷。因此,液氧絕對是無法飲用的。

      本文由北京印刷學院物理系副教授李蜜丹進行科學性把關。

      責任編輯: 史娜

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