Hameed Mulla, a lawyer for the doctors, made the remarks in a telephone interview from the capital Manama on Friday, Reuters reported.
The princess was one of the two police officers acquitted by the country’s Supreme Criminal Appeals Court on December 23.
The lawyer said that he intended to submit a request to appeal against the verdict for a second time.
On Monday, Bahrain’s Ministry of Information confirmed that the 29-year-old princess was acquitted, but did not elaborate on what charges she had faced or any other details.
Since mid-February 2011, thousands of pro-democracy protesters have held numerous demonstrations in the streets of Bahrain, calling for the Al Khalifa royal family to relinquish power.
On March 14, 2011, troops from Saudi Arabia and the United Arab Emirates invaded the country to assist the Bahraini government in its crackdown on peaceful protesters.
According to local sources, scores of people have been killed and hundreds arrested.
Physicians for Human Rights says doctors and nurses have been detained, tortured, or disappeared because they have “evidence of atrocities committed by the authorities, security forces, and riot police” in the crackdown on anti-government protesters.