Carondelet Health, a part of the Ascension hospital chain, said Tuesday that it had signed a definitive agreement to sell its two Kansas City area hospitals to Prime Healthcare Services. St. Joseph Medical Center in Kansas City and St. Mary's Medical Center in Blue Springs will become part of the for-profit Prime hospital chain, subject to regulatory approval. The terms of the sale, originally announced in July, remain confidential. Three Carondelet Health long-term-care facilities — Carondelet Manor, Villa Saint Joseph and St. Mary's Manor — and the two hospitals' charitable foundations will remain part of Ascension and are not included in the sale agreement.