(NYTimes) - The idea came to Jorge Odón as he slept. Somehow, he said, his unconscious made the leap from a YouTube video he had just seen on extracting a lost cork from a wine bottle to the realization that the same parlor trick could save a baby stuck in the birth canal.

Mr. Odón, 59, an Argentine car mechanic, built his first prototype in his kitchen, using a glass jar for a womb, his daughter’s doll for the trapped baby, and a fabric bag and sleeve sewn by his wife as his lifesaving device.

Unlikely as it seems, the idea that took shape on his counter has won the enthusiastic endorsement of the World Health Organization and major donors, and an American medical technology company has just licensed it for production.

With the Odón Device, an attendant slips a plastic bag inside a lubricated plastic sleeve around the head, inflates it to grip the head and pulls the bag until the baby emerges.

Doctors say it has enormous potential to save babies in poor countries, and perhaps to reduce cesarean section births in rich ones.

“This is very exciting,” said Dr. Mario Merialdi, the W.H.O.’s chief coordinator for improving maternal and perinatal health and an early champion of the Odón Device. “This critical moment of life is one in which there’s been very little advancement for years.”