There has never been a greater need for the Catholic approach to health care in response to the needs of the sick, Cardinal Raymond Burke has told participants in a medical ethics conference in Columbus, Ohio.

"In a totally secularised society, there is more than ever a hunger for the witness to the meaning of human life and human suffering which Catholic health care gives," said Cardinal Burke, who lives in Rome, where he serves as patron of the Knights of Malta.

A former archbishop of St Louis, the cardinal is a Church law expert and former prefect of the Vatican's highest court, the Apostolic Signatura.