In the 1950s and 1960s, Pappworth became concerned by descriptions in medical journals of unethical experiments on human subjects in the United Kingdom and
United States; Pappworth made plans to publish an extended version of his article as a book.
Human Guinea Pigs: Experimentation on Man named those responsible for the research and fully cited its sources. It detailed experiments on children and inmates of mental and penal institutions, and included 78 examples of research that had been carried out on patients who were at
National Health Service hospitals for routine surgery. Some of these patients had been subjected to
cardiac catheterisation—the insertion of a
catheter into a
chamber or
vessel of the
heart—without informed consent. Pappworth was advised by the medical establishment to keep quiet on the issue, but he refused. but
Human Guinea Pigs was eventually published in 1967 by
Routledge and Kegan Paul. but had not named those involved. Despite official lack of interest and professional impedance, Pappworth's and Beecher's work eventually led to the introduction of stricter codes of practice for
human experimentation and the establishment of
research ethics committees, which would have come much later had it not been for their exposés. In an article published by
King's Fund Alex Bayliss argues that this book had a huge impact on research ethics, he argues it was so powerful as Pappworth named names in the book and cited the papers in which unethical experiments were described. ==Later career and personal life==