How to be button aware

Tuesday, November 27, 2018

As Christmas quickly approaches, our final patient safety education session for 2018 focused on efforts to prevent and better identify button battery ingestion and insertion. Dr Ruth Barker, Senior Medical Officer at the Queensland Children's Hospital, and Director of the Queensland Injury Surveillance Unit (QISU), hosted the session. Dr Barker has been actively involved in button battery prevention following the 2015 coronial inquest into Summer Steer’s tragic death from injuries sustained from a button battery ingestion in 2013. The inquest made several recommendations for action across health, industry and regulatory bodies.

Dr Barker said children find the batteries ‘just about anywhere’ and while in most cases the source of the battery is unknown, cheap toy-like products such as novelty items and small torches are a major culprit. Younger children around 1-3 years of age are more likely to ingest a battery whereas older children (3-4 years) are more likely to insert the battery in their nose or ear. However, there have been incidents where older children and adults have swallowed batteries and infants under 12 months have been ‘fed’ batteries by siblings. "The battery charge is responsible for the damage. It triggers hydrolysis of water into hydrogen and hydroxide ions. The hydroxide ions cause a caustic injury that can cause progressive damage even after the battery has been removed," Dr Barker said.

Batteries most at risk of causing damage are the 20 millimetre 3-volt lithium button batteries. Lithium batteries are most problematic as the lithium holds the charge longer and enables the battery to have a longer shelf life. Only 1.2 volts or more of charge is required to cause damage and the larger lithium batteries still have sufficient charge to kill even when they are ‘spent’ or ‘dead’. The larger lithium batteries are also more likely to lodge in the oesophagus. Zinc air batteries, commonly found in hearing aid devices, cause less damage internally (as they require air to be active) but can still damage the nasal passage and ear canals. It takes around two hours for an ingested battery to erode into the oesophageal wall, making this injury a time critical emergency and a logistic challenge for health services. However, it is the ongoing damage that occurs over days to weeks that causes serious injury and death, (usually associated with erosion into major vessels).

In some cases, parents or carers are aware a battery has likely been ingested, having seen it happen, heard a gulp, cough or choking sound, or because a battery is missing. In cases when it is unclear if a battery has been swallowed, the child’s symptoms can be non-descript, but can include: partial food refusal, drooling, a croup-type cough, chest pain and later; upper GI bleeding, epistaxis (nose bleeds), or ear/nasal discharge. Dr Barker said food, liquid and vomit may move past the lodged battery, but once it is further embedded into the oesophageal wall, even solids can pass.

The Queensland Children’s Hospital battery ingestion pathway recommends a neck to bottom x-ray for ingestions (done in one film for smaller children), and the focused views if ear/nose insertion is suspected. In the x-ray, look for the ‘halo’ around the battery to help confirm diagnosis.

While Dr Barker said some efforts are being made to help increase the safety of batteries, and that the issue may eventually be engineered out, this will not occur for many years and the dangers are still present and real. Parents and clinicians alike still need to #bebuttonaware. Parents are encouraged to call the Queensland Poisons Information Helpline (13 11 26) for 24/7 fast expert advice and up to date management. Queensland Health staff can view the education session video on QHEPS (search 'PSU education sessions'). Visit KidSafe Queensland to see their work on button battery safety.

Discover more ways we are working to improve patient safety and quality in Queensland or read more news.

Wendy Fennah from our Patient Safety and Quality Improvement Service with Dr Ruth Barker. Wendy is holding a type of button battery in her palm.

PICTURED ABOVE (L-R): Wendy Fennah from our Patient Safety and Quality Improvement Service with Dr Ruth Barker. Wendy is holding a type of button battery in her palm.

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Last updated: 27 November 2018