For comparison, here is that image of St Agatha's breast torture by Philips Galle, from the website of the British Museum (low-res and hi-res). Definitely not a medical procedure!Mind you, even the museum curator seems unsure whether this is torture or treatment, as the notes go on to say "A similar instrument is used by Saint Agatha's torturer in an earlier (ca. 1600?) engraving by Philips Galle".
I should probably have included the links to my two other posts from the Wellcome Collection:I have recently posted some pictures of torture, taken from the website of the Wellcome Collection, which despite being a medical history museum seems to have a somewhat unhealthy interest in the topic.
...more please!