Wrong-patient chest radiograph discovered after a delayed diagnosis
At 01:40 in a busy MOH emergency department, a 7-year-old boy with fever and cough is sent for a chest radiograph. The DR worklist contains both his entry and that of a 54-year-old woman waiting for a pre-operative chest film. The radiographer selects an entry from the list without checking name, medical record number and date of birth together, images the boy, and the images are stored under the woman's record. The radiologist reports 'no acute cardiopulmonary abnormality' on the woman's file. The woman is then imaged correctly twenty minutes later, and no image is stored under the boy's name. Two days later the boy returns with a large right-sided pleural effusion. The admitting team reviews the earlier image on the woman's record, recognises it as a paediatric chest, and reports the incident. There is no written patient identification policy in the department and the RIS worklist is not barcode-enabled.
1. What are your immediate actions and notifications in the first 24 hours? Show the reasoning that sets the priority order.
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Priority one is the patients, not the paperwork. The child has a delayed diagnosis of a significant effusion; the clinical team must be told verbally and immediately that the earlier chest image belongs to him and depicts a paediatric chest, so that it can be reviewed as his and the effusion can be compared against a baseline. The woman needs to know that an image of another patient was stored in her record, that her own imaging was correct, and that her clinical result stands.
Priority two is containing the data error. The image must be flagged in PACS as a wrong-patient study, not deleted - deletion destroys the evidence and may breach record-retention obligations. It should be re-linked to the correct record by the PACS administrator under the radiologist's authority, with an addendum report stating what was re-identified and on what basis, and the original report on the woman's record must be formally withdrawn and replaced with a note explaining why.
Priority three is notification and documentation. Inform the head of the radiology department, the RSO, risk management and the treating consultant; complete a structured incident report while memories are fresh; record who was told what and when; and preserve the worklist entry, the request form and the console log. The hospital informs the MOH through its established incident-reporting route.
Priority four is candour. Both families are told what happened, by whom, and what will be done - an apology and an explanation, not an admission of liability drafted by lawyers.
Priority five. Audit the whole night's worklist for any other mis-linked study before the department reopens in the morning.
2. What are the root causes and which system controls would you introduce to prevent recurrence? Distinguish system failures from individual failure.
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System failures dominate. This event needs a worklist entry selected from a crowded list, a manual identity check at 01:40 with a queue waiting, no barcode, no written identification policy, and no second-person verification. Those are design faults that make the individual error likely for anyone working that shift.
Individual failure. There is still a professional failure: the three identifiers - name, medical record number and date of birth - were available and were not checked together, and the patient was not asked to state their name and date of birth. Both things are true, and a fair review says so without making the radiographer the whole explanation.
Controls, strongest first.
- Barcode or RFID wristband scanning into the modality worklist, so the accession number cannot be selected from a name list. This is the single highest-yield change and is the direction of travel for MOH facilities moving to integrated RIS/PACS.
- Compulsory two-identifier verification at the patient, not the form: the patient (or parent) states name and date of birth, matched against the request and the worklist. Three identifiers for paediatric and emergency work.
- A time-out before exposure - a spoken check by the radiographer, visible at the console.
- Worklist hygiene - no unverified or add-on entries accepted without a valid MRN; paper requests transcribed by a second person.
- Rejection and near-miss feedback - the near-misses where a wrong entry was caught are the free lessons.
- Staffing and workload review for the night shift; fatigue is a system variable, not an excuse.
Measurement. Audit identity-check compliance monthly by direct observation, and track wrong-patient events per 10,000 examinations as a quality indicator reported to the hospital quality committee.
3. What are the radiographer's professional and regulatory obligations here, and how should the images and the record be handled?
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Scope and accountability. The radiographer is accountable for correct patient identification, for justification and optimisation of the exposure, and for the accuracy of the record produced. The exposure itself was small in dose terms - a paediatric chest radiograph is on the order of a few hundredths of a milliequivalent of background - but the harm was diagnostic delay and a wrong entry in a patient's medical record, and dose is not the measure of seriousness here.
Record handling. Do not delete, do not overwrite, do not re-report silently. The correct sequence is: flag, re-link under radiologist authorisation with an audit trail, add an explanatory addendum, withdraw the incorrect report on the woman's file with a documented reason, and retain the original entry for the retention period required by MOH record-keeping rules. Every action is time-stamped by the PACS/RIS, which is what makes the trail credible.
Confidentiality. Only staff who need to know should see the other patient's image. Discussing the incident in the staff room, or showing the image as a teaching example without de-identification and approval, is a separate breach.
Regulatory reporting. The incident goes through the hospital's incident-reporting system to the MOH quality and patient-safety structure, and the radiation protection officer is informed because it involves a diagnostic exposure to a patient who was not the intended subject. If the hospital's licensing standards require notification of wrong-patient events within a defined time, that clock starts when the error is recognised, not when it is fully investigated.
Professional duty. The radiographer should cooperate fully with the review, give an honest account, and expect the review to ask what the system allowed - while accepting personal responsibility for the check that was available and not made.