Medical Labelling Mistake Causes Year-Long Treatment Delay | Healthcare Error Case Study (2026)

A simple labelling error, a year of unnecessary treatment: the shocking impact of a health centre's oversight.

A routine health centre procedure turned into a year-long ordeal for two clients due to a labelling mistake, which went unreported for months. This incident, as revealed by the NWT Information and Privacy Commissioner Andrew Fox, highlights the potential consequences of seemingly minor errors in healthcare settings.

On November 16, 2022, a community health nurse at the Marie Adele Bishop Health Centre mislabelled a specimen from Client A with Client B's details. Both individuals shared the same first and last name, age group, and birth month, but had different middle names, birth dates, and healthcare numbers. This seemingly minor oversight led to a chain of events with significant implications.

The specimen was tested at two laboratories, and the results were mistakenly recorded in Client B's medical record. The nurse, unaware of the error, informed Client B of the results and recommended treatment. Despite not recalling providing a specimen, Client B accepted the treatment, believing it was necessary due to their symptoms.

But here's where it gets controversial: the nurse failed to realize the mistake for six days. When they did, they reported it to the nurse in charge, who instructed them to file a report through the Tłı̨chǫ Community Services Agency's (TCSA) incident reporting system. However, the nurse never filed the report, citing work busyness.

The error remained unnoticed until another nurse discovered it months later, between April and June 2023, while reviewing Client A's medical record. This nurse also reported the issue to the nurse in charge, who again instructed them to file a report, but they failed to do so, claiming unfamiliarity with the reporting system.

The nurse in charge eventually reported the issue in June 2023, and the TCSA initiated an investigation in October. The agency contacted Client A in November, requesting new specimens for testing. Fox's report criticized the delay in reporting and investigating, stating it directly affected the clients' health services.

The root cause of the mistake? The report highlights the risk of misidentifying clients with similar names and demographics, a known issue for territorial health information custodians. TCSA policy mandates the use of at least two person-specific identifiers for client confirmation, but the nurse did not follow this protocol.

Adding to the controversy, the nurse had not completed privacy training, which would have likely covered the importance of these identifiers. TCSA policy requires all employees to complete privacy training within three months of hiring and annually thereafter, but only 70% of staff were up to date as of April 2025.

Fox's report holds the nurse in charge accountable for ensuring staff training and timely reporting. He also criticized the communication between nurses as 'poor' and noted the absence of a quality assurance and risk manager until September 2023, who promptly addressed the breach upon their appointment.

The TCSA has since implemented improvements, including mandatory privacy training for all employees, compensation for training time, and a tracking system for training completion. They've also added a 'same name alert' to the clients' electronic medical records to prevent future confusion.

This case serves as a stark reminder of the importance of meticulous attention to detail in healthcare. It raises questions about the effectiveness of privacy training and the potential consequences of delayed reporting. What do you think? Should there be stricter consequences for such oversights, or are these incidents inevitable in a busy healthcare setting?

Medical Labelling Mistake Causes Year-Long Treatment Delay | Healthcare Error Case Study (2026)

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