What is the importance of the hospital in the novel, All This Time?

There are several chapters set in the hospital, beginning with Kyle's arrival in the emergency room and picking up when he regains consciousness. The author mentions several specific settings in the hospital, including Kyle's room, the courtyard, a waiting room, the physical therapy room, and the cafeteria. Each is described only as necessary for their role in the events. For example, the reader knows there are bars used for the physical therapy and that Marley can see Kyle working on these bars from her position in the doorway. There are sprinklers in the courtyard and the water strikes the windows of Kyle's hospital room. The descriptions seem reasonable and believable.