After being admitted to hospital last week with a potentially life-threatening blood clot, Sinead Russell has been released.

The 21-year-old swimmer was in intensive care in a Gainesville, Fla. hospital last weekend.

Recovery will include missing the Canadian Pan Am swim trials.

“The next four weeks are critical,” her father Cecil Russell said in an e-mail to the Post yesterday (Wednesday) afternoon. “No swimming, no exercises… she has to have complete rest.”

Friday, swimswam.com reported the 2012 Olympian had been diagnosed with cerebral venous thrombosis — a blood clot in her brain.

The setback is serious enough that the Burlington swimmer will not participate in the Canadian Pan Am swim trials April 1-4, which are 10 weeks away.

Cecil Russell said Saturday that several specialists were involved in his daughter’s care.

Sinead Russell, in her junior year, is a member of the University of Florida Gators’ swim team.

“Gators are really stepping up big in every way a school could,” Cecil Russell told swimswam.com. “They are helping huge and (Sinead is getting) great support from the university.”

Russell last competed Jan. 3 for the No. 8-ranked Gators in a dual meet against Florida State, winning both the 100- and 200-yard backstroke.