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Everything You Need to Know About Sudden Infant Death Syndrome (SIDS)

by Dr. Trupti Shirole on January 7, 2023 at 5:30 PM
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When a newborn dies suddenly, and unexpectedly with no apparent cause, this is referred to as sudden unexpected death in infancy (SUDI). Sudden infant death syndrome (SIDS) and fatal sleep accidents are examples of this. A newborn can die of SUDI at any time of day or night, although most die peacefully while sleeping. Cot death was another name for SIDS.

What is Sudden Unexpected Death in Infants (SUDI)

SUDI is more prevalent in babies aged two to four months; however, it can occur in babies of any age. Babies that are premature, ill, or have a low birth weight are at a higher risk. SUDI can occur in both breastfeeding and bottle-fed newborns. Around 60% of those who die are boys (1).

Causes of Sudden Unexpected Death in Infants (SUDI)

SUDI does not have a known cause. There are no consistent warning indications that a SUDI is imminent, but there are risk factors to consider. Vulnerability, age, and external risk factors such as overheating and unsafe sleeping practices are examples of these. Minor infections are frequently identified in SUDI newborns; however, these infections are minor and do not cause death. The investigation into the causes of SUDI continues (5).

Lowering the Risk of Sudden Unexpected Death in Infants (SUDI)

A few easy childcare habits can significantly reduce your baby's risk of SUDI:

These precautions can significantly lower your baby's chances of dying abruptly and unexpectedly (4).

Safe Sleeping Guidelines for Infants

It is critical to place your infant to sleep on their back. If your infant sleeps on their stomach, their chance of SUDI increases considerably.


Healthy babies who sleep on their backs are less likely to choke on vomit than babies who sleep on their stomachs. Back-sleeping keeps newborns' airways clear and allows their defensive reflexes (gag, swallow, and arousal) to function optimally.

‘SUDI can happen at any point during a baby�s first year of life. Although the exact cause of SIDS is still unknown, doctors do know that the risk of SUDI appears to increase between the ages of 2 and 4 months and then declines after 6 months.’

Sleeping on your baby's back may gently flatten the back of their skull over time. This is known as positional plagiocephaly. It normally recovers on its own before the child's first birthday, with no medical intervention. You can assist by performing supervised Tummy Time while the baby is awake and not tired or hungry (2).

For the first six to twelve months of their life, your baby should sleep in their safe sleeping environment in your room, near to your bed. Sleeping a newborn in the same room, but not in the same bed, with parents or caregivers in the first six to twelve months of life has been proven to minimize the risk of SUDI by 50%. This is supposed to be because the parents or caregivers can easily view the newborn and ensure that it is safe.

This protective effect is lost when the infant is in a room with other children, most likely because the children are unsure if the newborn is safe or not.

In certain SUDI cases, newborns are discovered with blankets covering their faces. Some preventative measures include:

Exposure to Smoke Increases Risk of Sudden Unexpected Death in Infants (SUDI)

Tobacco smoke exposure in utero (during pregnancy) increases a baby's chance of SUDI. Babies who have been exposed to tobacco smoke after birth are likewise at a higher risk of SUDI (2).

Stop smoking before or as soon as possible during your pregnancy. The less you smoke, the less likely your baby will get SUDI.

Encourage your partner to stop smoking. Always make your home a smoke-free zone, and don't let anyone smoke near your kid or where he or she sleeps.

Factors that Influence Sudden Unexpected Death in Infants (SUDI)


Immunization and Sudden Unexpected Death in Infants (SUDI)

SUDI is most frequent between the ages of two and four months. This is the age at which most babies get immunized. However, there is no connection. There is some evidence that immunized babies are less likely to have SUDI than non-immunized neonates.

Feelings of Guilt and Remorse following Sudden Unexpected Death in Infants (SUDI)

Guilt, wrath, anxiety, blame, and despair are common feelings experienced by bereaved parents. Because the reasons for SUDI are unknown, parents frequently invent their explanations and blame themselves.

Talking with others outside the family, such as other bereaved parents, doctors, social workers, or counsellors, may be beneficial for mourning parents. Many people, however, find that their most useful support comes from their own family and friends.

References:
  1. Sudden unexpected death in infancy (SUDI), SIDS and fatal sleeping accidents - (https:raisingchildren.net.au/guides/a-z-health-reference/sudi)
  2. about Sudden unexpected death in infants (SUDI and SIDS) - (https:www.betterhealth.vic.gov.au/health/healthyliving/sudden-unexpected-death-in-infants-sudi-and-sids)
  3. Reducing SUDI and SIDS risk: in pictures - (https:raisingchildren.net.au/newborns/sleep/sleep-safety/reducing-sudi-sids-risk#)
  4. About Safe Sleep - (https:www.stanfordchildrens.org/en/about/government-community/safety-tips/safe-sleep)
  5. Sudden infant death syndrome (SIDS) - (https:www.mayoclinic.org/diseases-conditions/sudden-infant-death-syndrome/symptoms-causes/syc-20352800)


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