Dr. Charles Percy suggests they use a CT scanner from the zoo, for which he is chastised. This is similar to Scrubs: My New Suit, in which an overweight patient is advised that the only place with an MRI large enough is the zoo. The practice of referring patients to a zoo or veterinarian is commonplace, especially in America due to the high occurrence of obesity.
Every episode is named after a song. "Insensatez" (usually translated to "How Insensitive" in English) is a bossa nova jazz standard composed by Antônio Carlos Jobim, loosely based on Frédéric Chopin's "Prelude No.4"