Medical Terminology Daily (MTD) is a blog sponsored by Clinical Anatomy Associates, Inc. as a service to the medical community. We post anatomical, medical or surgical terms, their meaning and usage, as well as biographical notes on anatomists, surgeons, and researchers through the ages. Be warned that some of the images used depict human anatomical specimens.

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A Moment in History

Jean-Louis Petit

Jean Louis Petit
(1674 – 1750)

French surgeon and anatomist, Jean Louis Petit was born in Paris in on March 13, 1674.  His family rented an apartment at his house to Alexis Littre (1658 – 1726), a French anatomist. Petit became an apprentice of Littre at seven years of age, helping him in the dissections for his lectures and at an early age became the assistant in charge of the anatomic amphitheater.

Because of Petit’s dedication to anatomy and medicine, in 1690 at the age of sixteen, became a disciple of a famous Paris surgeon, Castel.

In 1692, Petit entered the French army and performed surgery in two military campaigns. By 1693 he started delivering lectures and was accepted as a great surgeon, being invited to the most difficult operations.  In 1700 he was appointed Chief Surgeon of the Military School in Paris and in the same year he received the degree of Master of Surgery from the Faculty of Paris.

In 1715 he was made a member of the Royal Academy of Sciences and an honorary member of the Royal Society of London. He was appointed by the King as the first Director General of the Royal Academy of Surgery when it was founded in 1731.

Petit’s written works are of historical importance.  “Traite des Maladies des Os” ( A Treatise on Bone Diseases);  “Traite des Maladies Chirurgicales et des Operation” (A Treatise on Surgical Diseases and their Operations” This last book was published posthumously in 1774. He also published a monograph on hemorrhage, another on lachrymal fistula, and others.

He was one of the first to perform choIecystotomy and mastoidotomy. His original tourniquet design for amputations saved many in the battlefield and the design of the same surgical instrument today has not changed much since its invention by him.

His name is remembered in the lumbar triangle, also called the "triangle of Petit", and the abdominal hernia that can ensue through that area of weakness, the lumbar hernia or "Petit's hernia".

Sources:
1. “Jean Louis Petit – A Sketch of his Life, Character, and Writings” Hayne, AP San Fran Western Lancet 1875 4: 446-454
2. “Oeuvres compl?tes de Jean-Louis Petit” 1837 Imprimerie de F. Chapoulaud
3. Extraits de l'eloge de Jean-Louis Petit Ius dans Ia seance publique de I' Academie royale de chirurgie du 26 mai 1750” Louis A. Chirurgie 2001: 126 : 475- 81


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Giovanni Domenico Santorini

This article is part of the series "A Moment in History" where we honor those who have contributed to the growth of medical knowledge in the areas of anatomy, medicine, surgery, and medical research.

Giovanni Domenico Santorini
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Giovanni Domenico Santorini (1681 – 1737). Italian anatomist, Santorini was born in 1681 in Venice. The son of an apothecary, Santorini studied medicine at Bologna and Padua, receiving his doctorate in Pisa in 1701. He was appointed Public Professor of Anatomy at the Physicomedical College of Medicine when he was 22 years of age.

Santorini was praised for the clarity of his lectures and his dexterity as an anatomist.  He used magnifying glasses to study minute anatomical details, allowing him to clearly describe small structures hitherto unknown. Most of Santorini’s biographical data was written by Michael Girardi (1731 – 1797), one of his students. Girardi published Santorini’s work posthumously in 1775 in the book “Anatomici Summi-Septendecim Tabulae”.

Santorini’s himself wrote “Opuscula medica de structura” (Minute Medical Structures) in 1705. His most important book was “Observationes anatomicae”, published in Venice in 1724. One of the most interesting chapters in this book was “De mulierum partis procreationes datis” (Data on the female procreational structures ), making him a pioneer in the teaching of obstetrics. Santorini was physician to the Spedaletto (Hospital) of Venice, where he taught midwifery.

Santorini died in 1737 because of an infection he acquired during the dissection of a cadaver. At that time the rationale for infection and cadaver embalming were unknown.

With his posthumous publications, Santorini’s name and teachings became popular. Today his name is eponymically tied to several structures in the human body:

• Duct of Santorini: An accessory pancreatic duct that opens into a secondary duodenal papilla in the second portion of the duodenum
• Santorini’s valves: Mucosal folds found in the lumen of the primary duodenal papilla (of Vater) or hepatopancretic ampulla
• Santorini’s muscle: Risorius muscle • Santorini’s cartilages: The laryngeal corniculate cartilages
• Santorini’s veins: A plexus of vesicoprostatic veins found in the retropubic space) of Retzius
• Santorini’s concha: The superior nasal turbinate

Sources:
1. “The Dorsal Venous Complex: Dorsal Venous or Dorsal Vasculature Complex? Santorini’s Plexus revisited” Power NE, et al. BJU Inter (2011) 108: 930-932
2. “Giovanni Domenico Santorini: Santorini’s Duct” Edmonson, JM Gastrointest Endosc (2001) 53:6; 25A
3. "Santorini of the duct of Santorini" Haubrich, WS  Gastroenterol 120:4, 805
4. “Wirsung and Santorini: The Men Behind the Ducts” Flati, G; Andren-Sandberg, A. Pancreatology (2002)2:4-11
5. "A Historical Perspective: Infection from Cadaveric Dissection from the 18th to the 20th Centuries" Shoja, MM et al. Clin Anat (2013) 26:154-160