Doctors only realised the mistake after they had opened the skull of the wrong patient and found no blood clot.
They had cut open the head of the wrong patient in a dizzying case of medical malpractice that once again casts the spotlight on the country's biggest referral hospital.
"I wish to pronounce myself on this matter by appointing in acting capacity Dr Mutie and Dr Ogech; both competent professionals who understand the systems in this hospital to take over and support the board complete the investigations which I have directed be conducted immediately".
Both were admitted to ward 5A, which was for general surgery and trauma patients without fractures.
An investigation by the Daily Nation newspaper revealed that two men had been taken to the hospital last Sunday.
"The management has suspended the admission rights of a neurosurgery registrar and issued him with a show-cause letter for apparently operating on the wrong patient", Ms Koros said.
The tags are the patient's only method of identification.
It wasn't until hours into the surgery that doctors discovered there was no blood clot, according to a report from the BBC news service.
After consulting a senior neurosurgeon, the operating doctor reportedly was instructed to proceed no further, clean up the area and close the head. They say the nurses who prepared the patient for surgery are the ones at fault because they wrongly labeled the two patients.
"I have seen the patient who ought not to have gone through surgery".
"They were also to check whether the patient was fit for the procedure". In a twist, the patient who actually has a blood clot may not get surgery after all because their condition has improved.