Joan Rivers Cause of Death Reexamined; Actress' Daughter Files Suit Against New York Clinic For Alleged Botched Medical Procedures

Joan Rivers' cause of death was reconsidered when Melissa Rivers, the late actress' daughter, filed a case against Yorkville Endoscopy where her mother experienced brain damage from a lack of oxygen while the establishment is doing a routine examination, USA Today reports.

"The level of medical mismanagement, incompetency, disrespect and outrageous behavior is shocking and frankly, almost incomprehensible. What ultimately guided me was my unwavering belief that no family should ever have to go through what my mother, Cooper and I have been through. It is my goal to make sure that this kind of horrific medical treatment never happens to anyone again," Melissa said in a statement.

The lawsuit was submitted on Monday to the New York County Supreme Court detailing the missteps alleged that have caused the comedian's death.

According to Time, the establishment had done serious missteps while treating the patient including "12-minute delay before calling 911; a photograph of the comedian taken by a doctor while Rivers was sedated and the failure to monitor vital signs; and a delay in intubating Rivers."

Further, CNN said that doctors performed the operation which the Rivers' family was not informed and did not give consent to be performed on the patient. Also, one of the doctors is said not to possess the right credentials to perform such operation.

"The conduct is unfortunately outrageous. Not only is there medical mismanagement but you have a situation where doctors are taking photos of a patient when she needed assistance. They didn't recognize the fact that she wasn't getting sufficient oxygen," Ben Rubinowitz one of the lawyers for Melissa Rivers said.

The comedian is said to have requested an examination determining the cause of her acid reflux. Further, she is said to have only consented for an upper endoscopy examination (EGD) to be performed on her and not with any other procedures before being sedated.

Joan Rivers was declared dead on Mount Sinai Hospital with cerebral hypoxia on September 4, 2014.