When a loved one is in the hospital, you naturally want to be at the bedside. But what if the staff won’t allow it? That’s what Janice Langbehn, a social worker in Lacey, Wash., says she experienced when her partner of 18 years, Lisa Pond, collapsed with an aneurysm during a Florida vacation and was taken to a Miami trauma center. She died there, at age 39, as Ms. Langbehn tried in vain to persuade hospital officials to let her visit, along with the couple’s adopted children.