Ron Jeremy -- Will Remain in Hospital for at Least 2 Weeks

Ron Jeremy will not be released from the hospital anytime soon ... TMZ has learned doctors want to keep the porn legend at Cedars-Sinai for AT LEAST the next two weeks to monitor his heart.

We broke the story ... doctors placed Ron in the intensive care unit at the L.A. hospital earlier this week after doctors discovered an aneurysm near his heart.

Ron -- who has already undergone 2 emergency surgeries -- is currently in critical condition.

One source close to Jeremy tells TMZ ... "Ron is in ICU and will be there for a few days but and will remain at the hospital for at least 2 weeks until doctors can see how he reacts to the surgeries.”