How Physics Saved Two Million Premature Babies

TL;DR

Premature babies with Respiratory Distress Syndrome have difficulty breathing due to collapsed or stretched lung sacs, but continuous positive airway pressure (CPAP) devices have greatly increased survival rates.

Transcript

Hi, this is Emily from MinuteEarth, in a special collaboration with Bill and Melinda Gates. Until a few decades ago, almost half the babies born more than six weeks premature died within a few hours or days, due to a mysterious ailment now known as Respiratory Distress Syndrome. Tens of thousands of babies died each year, in the United States alone... Read More

Key Insights

• 🥳 Prior to the invention of CPAP devices, almost half of babies born more than six weeks premature with RDS died within hours or days.
• 🫁 Respiratory Distress Syndrome is caused by collapsed or stretched alveoli in preemies' lungs.
• 🥺 The Law of Laplace explains why the alveoli squeeze too much in preemies with RDS, leading to breathing difficulties.
• 🇦🇪 CPAP devices have drastically improved the survival rate of preemies with RDS in the United States, from 1 in 4 to 3 in 4.
• ☠️ Various interventions, such as surfactant treatments and artificial surfactants, have further increased preemies' survival rates.
• 😘 The Rice 360 Institute for Global Health is introducing affordable and easy-to-maintain CPAP machines to lower-income countries, improving global survival rates for preemies with RDS.
• 👶 Over 2 million babies with RDS have been saved worldwide since the invention of CPAP devices.

Questions & Answers

Q: What is Respiratory Distress Syndrome (RDS)?

RDS is a condition in premature babies where their lung sacs, called alveoli, collapse or stretch, making it difficult for them to exchange carbon dioxide and oxygen.

Q: What is the Law of Laplace, and how does it relate to RDS?

The Law of Laplace states that a stretchy surface with more curvature applies more pressure to the fluid inside. In preemies with RDS, the alveoli squeeze too much due to lack of surfactants, causing collapse.

Q: How does continuous positive airway pressure (CPAP) help preemies with RDS?

CPAP devices pump air continuously into the lungs, keeping the pressure high enough to prevent the collapse of the smallest alveoli while not overinflating the larger ones. This helps preemies breathe until their lungs develop enough surfactant on their own.

Q: What interventions have contributed to the improved survival rates of preemies with RDS?

Preemies can now receive surfactant treatment before birth or be supplemented with artificial surfactants. These interventions, along with CPAP devices, have significantly increased the survival rate of preemies with RDS.

Summary & Key Takeaways

• Respiratory Distress Syndrome (RDS) was a deadly condition for premature babies until doctors discovered it was caused by collapsed or stretched lung sacs.

• Preemies' lungs lack sufficient pulmonary surfactants, causing the alveoli to squeeze too much or become distended.

• The invention of CPAP devices and other interventions have significantly improved the survival rate of preemies with RDS.