Many Russian athletes have had to wait until the eve of the Games to discover if they will compete in Rio.
International Olympic Committee (IOC) president Thomas Bach revealed that a figure of how many Russian athletes have been cleared to compete in the Rio Games will be announced later on Thursday.
Many sportsmen and women were still waiting to discover if they are able to take part in Brazil on the eve of the Games, which get under way on Friday.
A three-person panel set up by the IOC were given the final say on the fate of Russian competitors after individual sports federations and the Court of Arbitration also played a key part in the process following revelations of state-sponsored doping made in the McLaren report.
The Russian Olympic Committee president stated that 271 of the 387 Russian athletes named in the team have been given the green light for the Games in Brazil after Bach said a final figure will be announced in due course.
He said at a media conference: "We have informed the international federations and now we need to inform first the international federations of the athletes and the NOC concerned before we can publish the final results.
"This procedure will be under way and once it's been completed the panel will publish its findings."
Bach also once again defended the process of determining which athletes would be allowed to compete.
He said: "The first analysis has been done by the international federations; they got further advice from professor McLaren, who elaborated in some cases on his report and gave further evidence and advice.
"This has been taken into consideration by the IFs [international federations] and some asked for further clarification, who has been given.
"We then had the second step that these recommendations by the international federations were scrutinised by an expert appointed by CAS (the Court of Arbitration for Sport] and by an independent by the CAS board.
"They scrutinised the recommendations by the IFs and then finally the panel, to which the IOC delegated this task, has analysed both the recommendations of the IFs and the advice of the CAS panel expert and then has taken its decision.
"This is a very thorough, strict and clear procedure and you will see the results of the analysis and application of justice to ensure a level playing field at the Olympic Games."