Mar 25, 2024 - BBC News - What is the iron lung and how does it work?
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This is an iron lung, an iconic metal box invented by scientists in 1927, which revolutionized respiratory care. But why was it invented?
In the early 20th century, polio was ravaging Europe and North America. The worst cases involved muscle paralysis, a symptom that, when affecting the spinal cord, meant the patients couldn't breathe—a condition that almost certainly sealed their fate.
Enter the iron lung, a massive airtight metal box wrapped around the body of the patient to make sure their lungs kept doing their job even when their muscles couldn't. So how did it work?
Patients would lie in the cylindrical chamber with only their head exposed, while the machine rhythmically changed the air pressure inside the chamber.
As the pressure decreased and increased, the patient's chest would rise and fall just like the natural process of breathing.
An 8-year-old girl was the first to receive the treatment; she went from near death to breathing normally within seconds of being put into the box.
Despite being a life-saving device, the iron lung wasn't without limitations. Patients needed round-the-clock care and were confined to the machine often for weeks or months at a time, which limited their mobility and quality of life.
The iron lung fell out of use with the arrival of the first injectable polio vaccine, designated safe to use in the US in 1955.
Today, 92.5% of children in the US receive the polio vaccine by age 2. But the iron lung was a real hero in its time, keeping people alive when they needed it the most.
Dictation
This is an iron lung - an o box invented by scientists in 1927, which revolutionized re gear But why was it invented?
- This is an iron lung, an iconic metal box invented by scientists in 1927, which revolutionized respiratory care, but why was it invented?
In the early 20th, polio was r European and the U.S.. The worst cases involved musle paralysis, a symptom that when affect the final g man could't breath. Conditions almost certainly seal their fate.
- In the early 20th century, polio was ravaging Europe and North America. The worst cases involved muscle paralysis, a symptom that when affecting the spinal cord, meant the patients could't breathe, a condition that almost certainly sealed their fate.
And if the iron lung, a massive id metal box rup on their body efficient to make sure their lung to get doing their job even when their muscles conldn't. So how did it work?
- Enter the iron lung, a massive airtight metal box wrapped on the body of patient to make sure their lung kept doing their job even when their muscles conldn't. So how did it work?
Patients would lie inside cold chamber with only their head exposed, while the machine rythmelly change air pressure inside the chamber.
- Patients would lie in the cylindrical chamber with only their head exposed, while the machine rhythmically changed the air pressure inside the chamber.
As the pressure decreased and increased, the patients' chest would vi and fall just as the natural process of breathing.
- As the pressure decreased and increased, the patient's chest would rise and fall just as the natural process of breathing.
An 8-years-old girl was the first to receive the treatment. She went from nearly death to breathing normally within seconds of into the box.
- An 8-year-old girl was the first to receive the treatment. She went from near death to breathing normally within seconds of being put into the box.
Despite being the life saving device, the iron lung wasn't without limitations. Patients near around clock care and will confine the machine often for weeks or months at dying, which limit their mobility and quality of life.
- Despite being a life-saving device, the iron lung wasn't without limitations. Patients needed round-the-clock care and were confined to the machine often for weeks or months at a time, which limited their mobility and quality of life.
The iron lung for a lot of use with the arrival of the first injectable boiled vaccine does needed a safe to use in the U.S. in 1955.
- The iron lung fell out of use with the arrival of the first injectable polio vaccine, designated safe to use in the U.S. in 1955.
Today, 92.5% of children in the U.S. received polio vaccine by each too, but the iron lung was a real hero in this time, keeping people alive when they needed the most.
- Today, 92.5% of children in the U.S. received the polio vaccine by age 2, but the iron lung was a real hero in its time, keeping people alive when they needed it the most.
Note
iconic adj. 标志性的
respiratory n. 呼吸系统
poliomyelitis n. 脊髓灰质炎（常缩写为 polio）
ravage v. 肆虐、摧残（造成严重破坏） n. 肆虐、蹂躏（严重破坏或毁灭性影响）
paralyze v. 使瘫痪
paralysis n. 瘫痪
symptom n. 症状
spinal adj. 脊椎的
cord n. 绳索；木材的量度，128 立方英尺 v. 把绳子附加上
spinal cord 脊髓
breath n. 呼吸（ea 发音 e）
breathe v. 呼吸（ea 发音 i）
seal n. 密封件；铅或蜡封（保证文件来自发件人）；保证；神父对忏悔的保密；海豹；海豹突击队 v. 紧固或密封；用防水涂层涂；油炸食物以防止水分流失；明确地得出结论（排除反转的可能性）；用铅或蜡封
cylindrical adj. 圆柱形的
cylinder n. 圆柱；汽缸
chamber n. 大厅；卧室；密闭的空间或腔体（如心室）；一小组乐器 v. 上膛（枪）
rhythmically adv. 有节奏地
rhythmic adj. 有节奏的
rhythmicity n. 节奏感
rhythm n. 节奏
confine v. 限制 n. 界限
be confined to sth.
fall out of 不再被喜欢；不再流行
designate v. 指定、指派