We’re learning more about what happened to a three-year-old Kailua girl who died after a visit to the dentist. 
 
 On Dec. 3, 2013, Finley Boyle had a heart attack while undergoing a root canal at Dr. Lilly Geyer’s office at Island Dentistry for Children in Kailua. She slipped into a coma and died a month later. 
 
 An autopsy report says the drugs that were given to her were partly to blame. According to the medical examiner’s office, a combination of sedatives and anesthesia administered prior to and during the procedure played a role in her death. 
 
 According to a lawsuit filed by Finley’s family, Boyle was in the office to get four root canals done. A technician gave her five different drugs, including Demarol and other sedatives, and the girl went into cardiac arrest. 
 
 Boyle’s attorney says records show the girl wasn’t monitored while she was sedated. Instead of checking her oxygen levels every five minutes, it wasn’t done for 26 minutes. 
 
 Boyle’s mother, Ashley, said nobody there administered CPR. Someone had to get a doctor in another office. 
 
 The medical examiner’s office ultimately ruled the death an accident. 
 
 No criminal charges have been brought against Geyer. ||||| Story highlights Girl's parents are suing a dentist alleging negligence and dangerous conduct 
 
 They allege she was given improper medications with incorrect dosages 
 
 Finley Boyle suffered cardiac arrest and brain damage, the lawsuit alleges 
 
 The dentist has not responded to requests for comment 
 
 Finley Boyle, a 3-year-old Hawaii girl who suffered massive brain damage after undergoing a dental procedure last month, died Friday night, a hospice said Saturday. 
 
 The girl died with her family by her side, said Kenneth L. Zeri, president and chief professional officer of Hospice Hawaii. 
 
 "There are few greater privileges in life than to accompany someone on their end-of-life journey, providing comfort and support not only to that person but also to their loved ones," the statement said. "As with all of our patients, we were truly blessed to be able to be there for The Boyle Family and for Finley at the end of her journey." 
 
 Finley's parents are suing a Kailua, Hawaii, dentist, alleging negligence and dangerous conduct. 
 
 The lawsuit, filed against Lilly Geyer and her practice, Island Dentistry for Children, alleges improper medications with incorrect dosages were administered to the girl on December 3, according to court documents filed this week. 
 
 "As a direct and proximate result of the medications administered to (Finley) by defendants, (Finley) suffered cardiac arrest during her dental procedure," the lawsuit says. 
 
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 It alleges that, as a further result of improper medications, Finley "suffered severe and permanent brain damage." 
 
 Neither Geyer nor her attorney, John Nishimoto, responded to CNN's requests for comment. The Island Dentistry website states it has been permanently closed and directs patients to an e-mail address. 
 
 The lawsuit, filed Monday in Hawaii's First Circuit Court, alleges that Geyer had no plan in place to respond to medical emergencies, such as the one Finley suffered. It seeks unspecified damages. 
 
 Finley's mother, Ashley Boyle, said she first took her daughter to the dentist in November, when she was told her daughter needed six fillings and four root canals, she said. 
 
 They returned in December to undergo the root canals, Boyle said. 
 
 The parents allege that Finley was sedated and left unmonitored for 26 minutes. 
 
 Finley was moved from a hospital to the hospice in late December. 
 
 Finley's pediatric neurologist, Dr. Gregory Yen, said MRIs showed the girl suffered severe brain damage and that she was in a "persistent vegetative state."
– Drugs are likely to blame for the death of Finley Boyle, the 3-year-old Hawaii girl who died a month after going into cardiac arrest during a root canal at a Kailua dentist's office on Dec. 3, according to the official autopsy report. The report says the combination of sedatives and anesthesia Finley received during the procedure probably caused her death, the AP reports. The report noted that Finley was healthy, and ruled out any signs of an underlying heart condition or an allergic reaction. The medical examiner's office ruled the toddler's death an accident, and no charges have been brought against Dr. Lilly Geyer, KHON reports; however, Finley's family has filed a lawsuit claiming Finley was not monitored for 26 minutes while she was under sedation. Geyer's office has since shut down, but Geyer's attorney calls the Boyle family's allegations "unproven." (Meanwhile, a young mother in Hawaii is in a coma following wisdom teeth surgery.)