Later that day, Sveriges Television investigative TV show "Dokument inifrån" started airing a three-part series, titled "Experimenten", in which Macchiarini's work was investigated. The documentary showed Macchiarini continuing operations with the new method even after it showed little or no promise, seeming to exaggerate the health of patients following the experimental surgery despite the ultimate deaths of those patients. While Macchiarini admitted that the synthetic trachea did not work in the current state, he did not agree that trying it on several additional patients without further testing had been inappropriate. Allegations were also made that patients' medical conditions both before and after the operations, as reported in academic papers, were inconsistent with patient records. Macchiarini also claimed that the synthetic trachea had been tested on animals before using it on humans, something that could not be verified.