Falloppio published only one major work during his lifetime, the
Observationes anatomicæ, which first came out in 1561. Here he presented his numerous new anatomical findings, correcting and expanding on the works of Galen and Vesalius. Some of his findings referred to the head and the brain. He added much to what was known before about the internal ear and described in detail the
tympanum and its relations to the osseous ring in which it is situated. He also described minutely the
circular and
oval windows (fenestræ) and their communication with the
vestibule and
cochlea. He was the first to point out the connection between the
mastoid cells and the
middle ear. His description of the
lacrimal ducts in the
eye was a marked advance on those of his predecessors and he also gave a detailed account of the
ethmoid bone and its cells in the nose. The
aquaeductus Fallopii, the canal through which the
facial nerve passes after leaving the
auditory nerve, is also named after him. He also described the Fallopian hiatus, an opening in the anterosuperior part of the petrosal bone. His contributions to the anatomy of the
bones and
muscles were very valuable as well. He discovered, among others, the muscle that lifts the upper eyelid. He studied the
reproductive organs in both sexes, and gave the first precise description of the
uterine tube, which leads from the
ovary to the
uterus and bears his name to this day. He was the first to describe the
ileocecal valve, which prevents a reflux of fecal matter from the colon to the small intestines, and demonstrated its function to his students. He also was the first to identify the vessels in the abdomen which were later called lacteals because of their milky appearance after meals. His contributions to practical medicine were also important. He was the first to use an aural
speculum for the diagnosis and treatment of diseases of the ear, and his writings on surgical subjects are still of interest. After his death, some of his students published their lectures, in particular, on
ulcers,
tumors, medical cosmetics, and other surgical topics and on botany and mineral waters. In his lectures, Falloppio also described, around 1555, a linen sheath that previously had been soaked in medicinal substances and then dried and some authors have praised him as the inventor of the
condom. The sheath was not to be used during intercourse, however. A man who had intercourse with a woman he suspected of being infected with the French disease or
syphilis was to put the sheath over the glans penis after intercourse and leave it there for several hours to destroy infectious matter that might have entered the skin. Some authors have taken Falloppio's claim seriously - which is clearly phantastical - that he tested this sheath on a thousand or more men. Falloppio also lectured extensively on
mineral waters and their medicinal qualities and presented the results of his chemical analysis of the waters from various springs by means of distilliation. He argued against
Fracastor's theory of fossils, as described as follows in
Charles Lyell's
Principles of Geology: Falloppio of Padua conceived that petrified shells had been generated by fermentation in the spots where they were found, or that they had in some cases acquired their form from 'the tumultuous movements of terrestrial exhalations.' Although a celebrated professor of anatomy, he taught that certain tusks of elephants dug up in his time at Puglia were mere earthy concretions, and, consistently with these principles, he even went so far as to consider it not improbable, that the vases of
Monte Testaceo at Rome were natural impressions stamped in the soil. ==Legacy==