Ludwig Georg Courvoisier (10 November 1843 – 8 April 1918) was a surgeon from

Basel, Switzerland , french: link=no, Bâlois(e), it, Basilese , neighboring_municipalities= Allschwil (BL), Hégenheim (FR-68), Binningen (BL), Birsfelden (BL), Bottmingen (BL), Huningue (FR-68), Münchenstein (BL), Muttenz (BL), Reinach (BL), Riehen (BS), ...

.Vilardell, Francisco. ''Digestive Endoscopy in the Second Millennium'', Thieme, 2005, p. 239. He was one of the first doctors to remove

gallstone A gallstone is a stone formed within the gallbladder from precipitated bile components. The term cholelithiasis may refer to the presence of gallstones or to any disease caused by gallstones, and choledocholithiasis refers to the presence of mi ...

s from the

common bile duct The common bile duct, sometimes abbreviated as CBD, is a duct in the gastrointestinal tract of organisms that have a gallbladder. It is formed by the confluence of the common hepatic duct and cystic duct and terminates by uniting with pancrea ...

.Lee, H. S. J. ''Dates in Urology'', Informa Health Care, 2000, p. 42. In 1890, Courvoisier published the book ''Casuistisch-statistische Beiträge zur Pathologie und Chirurgie der Gallenwege'', a manual on biliary surgery in which he introduced the

medical sign Signs and symptoms are the observed or detectable signs, and experienced symptoms of an illness, injury, or condition. A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showin ...

known as

Courvoisier's law Courvoisier's law (known as Courvoisier's sign or Courvoisier–Terrier's sign, or Courvoisier syndrome) states that a painless palpably enlarged gallbladder accompanied with mild jaundice is unlikely to be caused by gallstones. Usually, the t ...

Entomology

Courvoisier was an

entomologist Entomology () is the scientific study of insects, a branch of zoology. In the past the term "insect" was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as arach ...

most interested in the

Lycaenidae Lycaenidae is the second-largest family of butterflies (behind Nymphalidae, brush-footed butterflies), with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterfl ...

. His entomological works include: *Courvoisier, L. G., 1910. Uebersicht über die um Basel gefundenen Lycaeniden. ''Verh. naturf. Ges. Basel'' 21: 153–164. *Courvoisier, L. G., 1910. Entdeckungsreisen und kritische Spaziergänge ins Gebiet der Lycaeniden. ''Entomologische Zeitschrift'' 23 (18): 92–94. *Courvoisier, L. G., 1912. Javanische Lycaeniden gesammelt von Edw. Jacobson. ''Tijdschr. Ent.'' 55: 15–19. *Courvoisier, L. G. 1912. Ueber Zeichnungs-Aberrationen bei Lycaeniden. ''Deut. ent. Zeit.'' ris26, pp. 8-65, pls 4,5*Courvoisier, L. G. 1916. Über Männchenschuppen bei Lycaeniden ''Verh. naturf. Ges. Basel'' 26, pp. 1-48, 2 pls*Courvoisier, L. G., 1920. Zur Synonymie des Genus ''Lycaena''. ''Deutsche Entomologische Zeitschrift'' (Iris)

914 __NOTOC__ Year 914 ( CMXIV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * Spring – Empress Zoe Karbonopsina leads a palace coup at Constantino ...

28: 143–176;

920 __NOTOC__ Year 920 ( CMXX) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * December 17 – Romanos I has himself crowned co-emperor of the Byza ...

34: 230–262. His butterfly collection and

herbarium A herbarium (plural: herbaria) is a collection of preserved plant specimens and associated data used for scientific study. The specimens may be whole plants or plant parts; these will usually be in dried form mounted on a sheet of paper (called ...

are held by the

Natural History Museum of Basel Natural History Museum Basel (german: Naturhistorisches Museum Basel) is a natural history museum in Basel, Switzerland that houses wide-ranging collections focused on the fields of zoology, entomology, mineralogy, anthropology, osteology and pal ...

References

External links

Full text
of Courvoisier's ''Casuistisch-statistische Beiträge zur Pathologie und Chirurgie der Gallenwege'' at

Google Books Google Books (previously known as Google Book Search, Google Print, and by its code-name Project Ocean) is a service from Google Inc. that searches the full text of books and magazines that Google has scanned, converted to text using optical c ...

. 1843 births 1918 deaths Swiss surgeons Swiss lepidopterists {{Switzerland-med-bio-stub