Given what we know, we can confirm that the patients will have died from a "lack of oxygen" even with normal blood oxygen levels due to the fact that cyanide blocks the function of oxygen in the body.
The main function of cyanide is that it blocks the oxygen from being used in the electron transport chain. This chain creates ATP, the energy needed for the body to complete any functions. Since the oxygen cannot be used despite it being present, the patients die of a lack of oxygen even with normal levels.
Therefore, we can confirm that the patients will have died from a "lack of oxygen" even with normal blood oxygen levels due to the fact that cyanide blocks the function of oxygen in the body.
To learn more about the electron transport chain visit:
https://brainly.com/question/13975046?referrer=searchResults
