Word for medical treatment gone wrong (not malpractice)

I am looking for a word (noun) or expression that describes medical treatment gone wrong, where the treatment was not the correct one, or where something else went wrong, possibly due to unforeseen complications, accidents, inaccurate test results, misdiagnosis, poor medical images, human errors, etc. Errors, independently of whether anyone is personally at fault.

I am not looking for the word ‘malpractice’, which to me indicates negligence, carelessness or incompetence, liable or possibly criminal. ‘Wrongful treatment’ also does not seem quite right.

An intended usage example is: "We believe this technology will reduce the risk of (medical treatment going wrong)."