Shalom Life | May 30, 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

The Michael J. Fox Foundation is Looking to Find the Connection between Parkinson's & Ashkenazi Jews The Michael J. Fox Foundation is Looking to Find the Connection between Parkinson's & Ashkenazi Jews TrendingIsraeli Cancer Survivor Gives Birth to Twins Thanks to Revolutionary Procedure Israeli Cancer Survivor Gives Birth to Twins Thanks to Revolutionary Procedure TrendingIsraeli Nonprofit Gives Modified Toy Cars to Disabled Children Israeli Nonprofit Gives Modified Toy Cars to Disabled Children Trending
 

Israel and China Boost Trade with New Tax Agreement

May 29, 2015 | By Ashley Ramnarain
Israel and China Boost Trade with New Tax Agreement

"The mutual recognition program streamlines and simplifies trade between two countries, while maintaining a high level of enforcement"

Read More

The Alchemist Releases New Instrumental Album Called 'Israeli Salad'

May 29, 2015 | By Nathan Burley
The Alchemist Releases New Instrumental Album Called 'Israeli Salad'

Song titles of note include "Shalom Alechem," "Yalla Yalla", "Yehudi El Yehudi" and "Bone Thugs N' Haifa"

Read More

WATCH: Jon Stewart Slams FIFA For Corruption Charges

May 29, 2015 | By Ashley Ramnarain
WATCH: Jon Stewart Slams FIFA For Corruption Charges

"To put this in perspective, this FIFA corruption started Jennifer Lawrence ago," the comedian said on the latest episode of The Daily Show

Read More

France Pays Tribute to Four Nazi Resistance Fighters

May 29, 2015 | By Nathan Burley
France Pays Tribute to Four Nazi Resistance Fighters

Emotional ceremony held to honour 70th anniversary of the end of World War II

Read More

'Rabbi' is Suing Ice Cube for $2 Million After Alleged Assault Fuelled by Anti-Semitism

May 29, 2015 | By B. Shane Morganstein
'Rabbi' is Suing Ice Cube for $2 Million After Alleged Assault Fuelled by Anti-Semitism

The man, claiming to be a rabbi, says he was assaulted outside an elevator in a Detroit casino

Read More

New Ben and Jerry's Flavour to Tackle Climate Change

May 29, 2015 | By B. Shane Morganstein
New Ben and Jerry's Flavour to Tackle Climate Change

The new flavour, called 'Save our Swirled', is just one way the company hopes to support saving the environment

Read More

Tori Spelling: Happy Gay Pride, Tel Aviv. I Love You

May 29, 2015 | By Ashley Ramnarain
Tori Spelling: Happy Gay Pride, Tel Aviv. I Love You

WATCH: 'Beverly Hills 90210' actress films video teaser thanking her Israeli fans in anticipation of the 7th annual Donna Martin Party in Tel Aviv

Read More

More Headlines