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[quote=Anonymous][quote=Anonymous]Why does a week make a difference in the 20 vs. 21 week argument? What happens in those 7 days that make life vs death possible?[/quote] 20 or 21 weeks is still pre-viable. 22 weekers are being resuscitated more and more often. And resuscitation at 23 weeks is almost becoming standard. The biggest single change is in lung maturity. Surface area of oxygen absorbing tissue in the lungs is increasing exponentially. Plus, surfactant, the substance that lets lung tissue stretch and open rather than stick and tear beings to be produced. Everything else is really a matter of degree. But we've really hit a wall in Neonatology until we can get around the issue of lung development. (Posted from call room in the NICU)[/quote]
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