Shalom Life | March 06, 2015

C-Section Infants More Likely to Fail First Hearing Test

Israeli research finds babies delivered from Cesarean section three times more likely to fail test

By: Kathleen Doheny

Published: June 21st, 2012 in Health » Israel

C-Section Infants More Likely to Fail First Hearing Test

Infants delivered by Cesarean section are three times more likely than babies delivered vaginally to fail their first hearing test, which is performed shortly after birth, new research from Israel finds.

However, the researchers noted that parents should be aware of this difference, but not alarmed, because this hearing “problem” is typically temporary.

Dr. Tatiana Smolkin, a neonatal researcher at Rambam Medical Center in Haifa, Israel, who worked on the study, said the loss generally disappears after 72 hours.

“Fluids are retained in the middle ear,” which seems to affect neonatal hearing, she explained.

U.S. experts agreed that parents should take the information in stride.

“I think the take-home message is if you have had a C-section be prepared there is a higher chance your baby is going to fail one of these hearing tests, whether or not they have a hearing loss,” said Dr. Richard Rosenfeld, chair of otolaryngology at SUNY Downstate, in Brooklyn, N.Y. He co-chaired the committee that crafted the American Academy of Pediatrics’ guidelines on the management of the middle ear problem known as otitis media with effusion.

Dr. Dennis Woo, a pediatrician at the University of California, Los Angeles, Medical Center in Santa Monica, said the problem is often transient, and if the testing were done three or four days after birth, the results would likely be very different.

“There is nothing worrisome here as far as for the parents,” Woo said. To be sure, parents need to follow up with the baby’s pediatrician, the doctors agreed.

Hearing test within 48 hours

For the study, the Israeli researchers evaluated 1,653 newborns. Of these, 1,170 were delivered vaginally; the other 483 by C-section. They looked at the babies’ results on their first hearing test, known as the otoacoustic emissions test.

Otoacoustic emissions are sounds given off by the inner ear when the inner ear structure known as the cochlea is stimulated by a sound. When the sound occurs, the outer hair cells of the ear vibrate. This produces an almost inaudible sound that throws an echo back into the middle ear.

The person conducting the test inserts a small probe into the ear canal to measure the sound; those with certain levels of hearing loss do not produce these very soft sounds. The test can also detect the presence of middle ear fluid, which can temporarily affect hearing.

In the study, nearly 21 percent of the C-section babies failed the test, while only a little more than seven percent of those delivered vaginally did. The test was done before the babies were 48 hours old.

The risk of failing the test, overall, was also higher in those babies who had it before they were a day old.

In the United States, about one-third of births are Cesarean.

The study, published online June 11, appears in the July print issue of the journal Pediatrics.

Repeat Tests

As the babies got repeat tests, most had normal results. The researchers had to refer 10 who did not — five delivered vaginally, and five C-section babies — for a different test that evaluates auditory brainstem functioning. All of these infants passed this test.

The researchers suggested that the first hearing test after C-section should preferably be delayed until the baby is beyond 48 hours old

Israeli Doctor Resorts to Crowdfunding to Treat Three-Year-Old Girl's Disease Israeli Doctor Resorts to Crowdfunding to Treat Three-Year-Old Girl's Disease TrendingBamba May Be The Cure To Peanut Allergies… Sort Of Bamba May Be The Cure To Peanut Allergies… Sort Of TrendingTop 20 Under 40: Marni Wasserman Top 20 Under 40: Marni Wasserman Trending
 

Jerusalem Rabbi Says Gays Don't Deserve Human Rights, Compares Them to Murderers

March 06, 2015 | By Kobi Nachshoni
Jerusalem Rabbi Says Gays Don't Deserve Human Rights, Compares Them to Murderers

Grand Rabbi Mayer Alter Horowitz, leader of Boston Hasidic dynasty's Har Nof branch, says religious homosexuals have two options: to suppress their sexual desires or marry a woman

Read More

Jewish Hall of Fame: Ralph Lauren

March 05, 2015 | By Caitlin Marceau
Jewish Hall of Fame: Ralph Lauren

Entrepreneur, fashion designer, and founder of one of the most recognizable brands in the world

Read More

Adam Sandler and Bob Barker Are Still Fighting Almost 20 Years Later [VIDEO]

March 05, 2015 | By Ashley Baylen
Adam Sandler and Bob Barker Are Still Fighting Almost 20 Years Later [VIDEO]

The 'Happy Gilmore' feud continued on Comedy Central's 'Night of Too Many Stars'

Read More

‘Star Trek’ Symphony Coming to a City Near You

March 05, 2015 | By Ashley Baylen
‘Star Trek’ Symphony Coming to a City Near You

'Star Trek: The Ultimate Voyage' is going on a 100 city concert tour

Read More

Lena Dunham Wigs Out For First ‘Scandal’ Appearance

March 05, 2015 | By Ashley Baylen
Lena Dunham Wigs Out For First ‘Scandal’ Appearance

The 'Girls' creator will be making her debut on 'Scandal' March 19.

Read More

New York Synagogue Launches New Campaign to Promote Gender Equality

March 05, 2015 | By Shalom Life Team
New York Synagogue Launches New Campaign to Promote Gender Equality

Social media campaign #ShoutEquality urges Jewish men and women to raise their voices on Jewish feminism

Read More

UK’s School Of Oriental And African Studies Student Union Say ‘Yes’ to BDS

March 05, 2015 | By Caitlin Marceau
UK’s School Of Oriental And African Studies Student Union Say ‘Yes’ to BDS

Despite less than 30% of students participating in the vote, the student union is pushing for SOAS to cut all ties with Israel, including the ones with Hebrew U

Read More

Jewish Students Make Embroidered Megillat Esther

March 05, 2015 | By Caitlin Marceau
Jewish Students Make Embroidered Megillat Esther

As part of the school's annual design and engineering cooperation, four students made a creative, machine-embroidered scroll in time for Purim

Read More

More Headlines