Van Persie fit for semi-final after elbow scare
Van Marwijk had earlier told reporters in Johannesburg that defender Joris Mathijsen was also in hospital for a scan on a knee injury.
A statement said: "Neither scan on Van Persie or Mathijsen showed any serious damage and both are fit to play against Uruguay."
Netherlands knocked favourites Brazil out of the tournament on Friday with a comeback 2-1 win in Port Elizabeth in which Van Persie played 85 minutes.
Mathijsen had been named in the starting line-up against Brazil but was replaced after being injured in the pre-match warm-up.