Court Commissioner Reva Goetz named Jamie Spears and an attorney as conservators of the troubled singer's multi-million dollar estate, one day after she was rushed to hospital amid renewed concern for her mental health.

Ms Goetz' decision came in an emergency hearing at Los Angeles Superior Court.

A further hearing has been scheduled for Monday.

A conservatorship is created when a court rules that an individual is incapable of caring for themselves or properly managing their affairs.

The precise terms of the order were not immediately clear, although reports said the ruling would allow Jamie Spears broad license to take decisions on his daughter's behalf.

In a separate ruling, the commissioner issued a restraining order against Spears' manager Sam Lutfi, according to reports.

Lutfi's position in Spears' inner circle has been the subject of intense scrutiny by celebrity media, with the singer's parents reportedly accusing him of putting their daughter's health and assets at risk.

Before Friday's hearing took place, Lutfi lashed out at Spears' family in comments reported by People magazine.

'I object to this. Britney is fully capable of handling her own finances. Her doctors are capable of handling her health care,' he told People.

'You'd think in a time like this, the family would be at the hospital taking care of their daughter, rather than fighting for her money. How sad.'

The court rulings come after Spears was admitted to hospital on Thursday for the second time in less than a month.

She was placed in the psychiatric unit of the UCLA Medical Center and placed on a 72-hour order used for people deemed a danger to themselves or others.

The hospital drama in the early hours of Thursday came after a psychiatrist treating Spears had contacted Los Angeles police to set the events in motion.

A motorcade the length of a football field escorted the pop star's ambulance and kept a crowd of media and onlookers at bay.

Later on Thursday, the singer's mother told a scrum of reporters outside the medical centre that Spears was resting, without commenting further.

The drama is the latest in a series setbacks for Spears, who was stripped of visitation rights to her two baby sons in early January shortly after her first mental health scare.

During that incident the singer was wheeled out of her home following a stand-off which began when she refused to release her two children, Sean Preston, 2, and Jayden James, 1, to ex-husband Kevin Federline's bodyguard.

Spears was taken to the Cedars Sinai Medical Center for mental evaluation before she discharged herself two days later. -- AFP