An English woman died in the dentist's chair after suffering a deadly reaction to mouthwash, an inquest has heard.
Sacha Rumaner was receiving treatment for a suspected infected tooth at a Brighton dental clinic in February when she began complaining of feeling hot and itchy after rinsing with household mouthwash Corsodyl.
She then suffered an anaphylactic shock and slid onto the floor, dying within minutes.
Dentistry staff thought she had an epileptic shock or choked on vomit and followed instructions from an emergency call operator who told them to clear her airways and monitor her breathing.
Paramedics arrived within minutes but could not resuscitate her. She was pronounced dead en route to Brighton's Royal Sussex County Hospital.
The inquest heard how Miss Rumaner turned blue, had no pulse and stopped breathing after using the mouthwash.
Staff should have given her adrenaline, oxygen and chest compressions.
Dentist Labina Rahman admitted she missed the warning signs of anaphylactic shock despite the deputy coroner saying it is the main cause of cardiac arrest in dental patients.
Miss Rumaner was later found to be allergic to a chemical called chlorhexidinel.
The hearing has been adjourned.
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