Key Takeaways
- Clyde MacLean, a 59‑year‑old type 1 diabetic, suffered a severe hypoxic brain injury during a routine dental implant procedure in May 2023.
- The anaesthetic record shows multiple doses of midazolam, propofol, and other agents, followed by a rapid drop in oxygen saturation from 99 % to 47 % and profound bradycardia.
- Despite aggressive resuscitation—including atropine, chest compressions, increased oxygen flow, and eventual intubation—MacLean remained comatose for ten days and emerged with lasting paralysis, speech loss, and dependence on full‑time care.
- His wife, Shareen Ali, quit her job to provide round‑the‑clock care and lodged a formal complaint with the Health and Disability Commissioner (HDC) in February 2024.
- An external expert anaesthetist, Dr Graham Roper, concluded that the attending anaesthetist made “serious procedural errors” by prioritising medication administration over immediate ventilation when hypoxia and bradycardia appeared.
- The HDC referred the complaint to the Medical Council in October 2024, but investigations have stalled, with no decision communicated as of early 2026, leaving the family without answers or accountability.
- The case highlights gaps in communication, oversight, and timely resolution within New Zealand’s health‑complaint system, underscoring the need for clearer protocols and faster adjudication to protect patient safety.
Background of the Patient and Procedure
Clyde MacLean was a 59‑year‑old man living with type 1 diabetes but otherwise in good health when he presented to a specialist Auckland dental clinic on 25 May 2023 for the final stage of a tooth‑extraction and implant procedure. He had undergone two prior appointments at the same clinic without incident. The clinic’s staff were aware of his diabetic condition, yet deemed him fit for sedation. MacLean arrived at 12:10 pm, prepared for intravenous sedation, and the procedure commenced shortly thereafter. The intention was to complete the implant placement under conscious sedation, a routine practice for many dental surgeries.
Details of Sedation Administration
According to the anaesthetist’s records supplied to NZME, MacLean received 2 mg of midazolam at 12:30 pm, followed by 50 mg of propofol ten minutes later. A second 50 mg bolus of propofol was administered at 12:40 pm, coinciding with the dentist’s injection of 4 ml of adrenaline. Between 12:40 pm and 12:50 pm, three additional 50 mg aliquots of propofol were given, along with 1 g of paracetamol, 4 mg of parecoxib, and 8 mg of dexamethasone. At 12:59 pm the dentist noted MacLean’s jaw tightening—a possible sign of residual sensation—prompting a further 50 mg dose of propofol, which became the last sedative administered.
Onset of Complications and Emergency Response
Just one minute after the final propofol dose, at 1:00 pm, MacLean’s oxygen saturation plummeted from 99 % to 47 %, a level far below the 90 % threshold considered safe. Simultaneously, his heart rate slowed dramatically, revealing profound bradycardia. Clinic staff immediately increased oxygen delivery from the default 2 L/min to 6 L/min, then to 15 L/min as saturations continued to fall. The anaesthetist recognised the impending cardiac arrest, drew up 600 µg of atropine, flushed it with saline, and initiated chest compressions to circulate the drug while an ambulance was summoned.
Immediate Medical Interventions and Transfer to Hospital
Chest compressions restored a measurable heart rate, after which compressions were stopped. Ten millilitres of 50 % dextrose and 100 % oxygen via a manual resuscitator were administered; although the chest rose and fell, oxygen saturation remained low. A laryngeal mask airway was inserted, and approximately ten minutes of vigorous hand ventilation were required before saturations began to improve. Paramedics arrived during this period, intubated MacLean, and transferred him to Auckland City Hospital’s intensive care unit. He was later moved to Middlemore Hospital on 2 June 2023.
Long‑Term Consequences for Clyde MacLean
MacLean remained in a coma for ten days before regaining consciousness, but he awoke with severe neurological deficits: paralysis, inability to speak or swallow, and dependence on others for basic needs. Through intensive rehabilitation he has recovered limited movement, yet he remains far from his pre‑incident level of function. The hypoxic brain injury has permanently altered his quality of life, requiring continuous supervision and assistance.
Family’s Advocacy and Ali’s Sacrifice
Shareen Ali, MacLean’s wife, left her employment to provide full‑time care for her husband, a role she continues to fulfil. She has described the impact of the incident as “beyond any words can express” and expressed desperation for answers and preventive measures to avoid similar tragedies. Ali’s advocacy has driven the couple’s pursuit of accountability, turning personal grief into a public call for systemic improvement.
Formal Complaint to the Health and Disability Commission
In February 2024 the couple lodged a complaint with the Health and Disability Commissioner (HDC), citing the anaesthetist’s actions as the cause of MacLean’s injury. The HDC acknowledged the complaint four days later and requested medical records from the dental surgeon, anaesthetist, Auckland Hospital Critical Care Unit, and MacLean’s GP. After reviewing the material, Accident Compensation Corporation (ACC) could not identify a clear cause for the brain injury and forwarded the case to an external expert anaesthetist for further opinion.
Expert Assessment and Findings
Dr Graham Roper, a specialist anaesthetist at Te Nikau Hospital, evaluated the case and determined that the attending anaesthetist committed “serious procedural errors at a critical time.” Specifically, Roper noted that when MacLean developed profound bradycardia amid very low oxygen saturations, the appropriate immediate response should have been aggressive manual ventilation with enriched oxygen, while another team member prepared and administered atropine under direction. Instead, the anaesthetist spent valuable time drawing up and delivering medications, delaying essential ventilation. Roper concluded that timely ventilation might have restored adequate oxygenation and heart rate without the need for pharmacological intervention.
Referral to the Medical Council and Procedural Delays
Based on Roper’s report, the HDC referred the complaint to the Medical Council in October 2024, stating that the Council is better suited to assess competency concerns about individual doctors. The Council assigned an investigator, but communication broke down: Ali received a letter indicating the Council awaited the HDC’s investigation, despite the referral having already been made. By July 2025 the HDC informed Ali that the complaint had been sent back to the Council, with a decision promised for February 2026. When February passed without reply, Ali contacted the Council again in March 2026 and was told no decision had been reached. The elapsed time—over two years since the referral—has left the family without resolution.
Responses from Institutions and Ongoing Frustration
When approached for comment, the founder of the Auckland dental clinic asserted that “we have done nothing wrong” and declined to elaborate. The anaesthetist involved has since moved to a different practice. Both the HDC and the Medical Council cite privacy and natural‑justice constraints when asked to confirm details of ongoing investigations, limiting public disclosure. Ali has expressed growing hopelessness, noting that three years have elapsed since the incident with “no meaningful explanation or a response to our complaint.” She stresses that transparency is essential not only for her family’s closure but also to protect future patients from similar harm.
Reflections on Systemic Issues and Lessons Learned
This case underscores several systemic weaknesses: the potential for delayed recognition of hypoxia and bradycardia during sedation, the importance of prioritising ventilation over medication administration in crisis situations, and the need for timely, transparent investigations by health‑oversight bodies. The prolonged interval between complaint receipt and decision erodes trust in the Health and Disability Commissioner and the Medical Council, suggesting that procedural timelines must be tightened. Implementing mandatory critical‑incident debriefs, real‑time oxygen‑monitoring alerts, and clear escalation pathways could mitigate such errors. Ultimately, ensuring that complaints are investigated swiftly and outcomes communicated openly is vital to safeguarding public health and preserving confidence in New Zealand’s healthcare system.