Mr Hickey - who has stepped aside as OCI President - was released on bail yesterday
The family of Pat Hickey has met with the Foreign Affairs Minister to express concerns about his treatment by the Brazilian justice system.
Mr Hickey was released on bail from the high security Bangu Prison yesterday.
He temporarily stepped down as president of the Olympic Council of Ireland (OCI) following his arrest in Brazil.
He was arrested by police investigating the alleged illegal re-sale of Rio 2016 tickets.
Mr Hickey's family had called for a meeting with Charlie Flanagan after expressing concerns about the manner of Mr Hickey's arrest, his right to a fair hearing and his detention without charge.
They have also cited worries about the effects of the arrest on his health and the pre-trial disclosure of purported evidence to the media "without any right of a reply".
Following this afternoon's meeting, the family's solicitor Anne Marie James released a statement thanking the minister for meeting with them.
"The family has been re-assured that the Minister and the Department of Foreign Affairs are doing everything in their power to provide all necessary consular support to Mr Hickey at this time," the statement adds.
Minister Flanagan earlier said he is concerned about Pat Hickey's well-being - but added he cannot interfere in the legal process.
"I want to make it quite clear that there are no circumstances under which I or any of my officials would interfere in the judicial process of any country," he said.
In a statement after his release yesterday, Pat Hickey said: "I will now stay in Rio and my lawyers will proceed to have the charges laid against me set aside as there is no substantive proof of any wrong doing on my part."