Although infrared thermal screening may provide visually impressive and potentially useful images in some cases, the use of temperature differentials to detect patients at particularly high risk for pressure injury owing to local blood flow is not supported by results of this study.

The reduced average skin blood perfusion is attributable to blunting of hyperemia when relief pressure is too high. When it corresponded to an interface pressure near diastolic pressure, little, if any, functional pressure relief or hyperemia is realized. Suitable relief pressures are likely dependent on an individual's diastolic blood pressure and the net tissue forces acting on heel blood vessels. This suggests that lower blood pressures need lower pressure-relief levels. It is suspected that if depressed vascular responsiveness and/or diminished hyperemic reserve is also present, even lower relief pressures are needed.

In the midst of his account of the events, Thucydides says that it was difficult to switch Athens from democracy to the oligarchic rule of the Four Hundred (8.68.4). Most modern scholars have agreed, viewing the rise of the Four Hundred primarily as a coup effected by violence, terror and deceit. This interpretation does not conform to Thucydides' narrative (8.47-70), however, which shows that it was not very hard to end the Athenian democracy. Although terror, violence and propaganda have their place in Thucydides' account, modern treatments overemphasize them and so ignore or gloss over Thucydides' charge that the Athenian people did not resist oligarchy very strenuously and so bear a large share of responsibility for it. In Thucydides' narrative Peisander et al. are open about plans for oligarchy (if not for the extremely limited oligarchy that they eventually put in place at Kolonos) both on Samos and in Athens, and meet little resistance from democratic supporters. In addition, Thucydides' rhetoric repeatedly mutes what resistance there is, as if to underscore its weakness. Thucydides' Athenians for the most part quickly and easily abandon their democracy. There was a ‘terror’ campaign, but its scope, effect and need has been exaggerated. In particular, there is no reason to think that the location of the Kolonos meeting – where the Athenians voted the limited oligarchy of the Four Hundred into power – terrified them into doing so. Thucydides' comment on the difficulty of the task of the Four Hundred is ironic. There is a jarring contrast between Thucydides' judgement and his narrative which, when recognized, compels readers to re-examine their own assumptions and expectations. The attention modern commentators have given to Thucydides' words about intimidation and propaganda have left them deaf to the other interesting story Thucydides has to tell about the role the Athenian demos played in the move to oligarchy.

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