Würtz was a friend of Gessner and an admirer of Paracelsus; his book went through many editions and was translated into English, French, and Dutch. It describes the treatment of gunshot wounds, fractures, and dislocations, but does not include operative surgery.

Würtz left an unpublished work on pediatrics that was first published by his brother Rudolf in an expanded edition of Practica der Wundartzney, Basel: Sebastian Henripetri, 1612. This work was traditionally considered the first work on pediatric surgery; however, Würtz did not describe any operations—only splinting and bandaging of deformed limbs. English translation, London, 1656, which was reprinted in J. Ruhräh's Pediatrics of the Past (1925). Digital facsimile of the Basel, 1596 edition from Google Books at this link. Digital facsimile of the Basel, 1612 edition from the Internet Archive at this link.