Georges Hayem (25 November 1841 – 28 August 1933) was a physician and

hematologist Hematology (American and British English spelling differences#ae and oe, always spelled haematology in British English) is the branch of medicine concerned with the study of the cause, prognosis, treatment, and prevention of diseases related to ...

born in

Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. S ...

. He studied medicine in Paris, and later became a professor of

therapy A therapy or medical treatment (often abbreviated tx, Tx, or Tx) is the attempted remediation of a health problem, usually following a medical diagnosis. As a rule, each therapy has indications and contraindications. There are many different ...

and materia medica. Beginning in 1878 he practiced medicine at the Hôpital Tenon; later on, he was associated with the Hôpital St. Antoine. From 1893 until 1911 he held the chair of clinical medicine. Georges Hayem was a pioneer in the field of

hematology Hematology ( always spelled haematology in British English) is the branch of medicine concerned with the study of the cause, prognosis, treatment, and prevention of diseases related to blood. It involves treating diseases that affect the produc ...

, and is remembered for his studies on the formation of

leukocyte White blood cells, also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from mult ...

s and

erythrocyte Red blood cells (RBCs), also referred to as red cells, red blood corpuscles (in humans or other animals not having nucleus in red blood cells), haematids, erythroid cells or erythrocytes (from Greek ''erythros'' for "red" and ''kytos'' for "holl ...

s. He performed the first accurate count of blood platelets, and is credited with developing a solution of mercury bichloride,

sodium chloride Sodium chloride , commonly known as salt (although sea salt also contains other chemical salts), is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. With molar masses of 22.99 and 35.45 g ...

and

sodium sulfate Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na2SO4 as well as several related hydrates. All forms are white solids that are highly soluble in water. With an annual production of 6 milli ...

for dilution of blood prior to counting erythrocytes with a hemocytometer. In 1874 he provided an early description of chronic interstitial

hepatitis Hepatitis is inflammation of the liver tissue. Some people or animals with hepatitis have no symptoms, whereas others develop yellow discoloration of the skin and whites of the eyes (jaundice), poor appetite, vomiting, tiredness, abdominal pa ...

. With

bacteriologist A bacteriologist is a microbiologist, or similarly trained professional, in bacteriology -- a subdivision of microbiology that studies bacteria, typically Pathogenic bacteria, pathogenic ones. Bacteriologists are interested in studying and learnin ...

Georges-Fernand Widal Georges-Fernand-Isidor Widal (March 9, 1862 in Dellys, Algeria – January 14, 1929 in Paris ) was a French people, French physician. From 1886 to 1888 he devoted himself to public demonstrations of the researches of the faculty of pathological a ...

(1862–1929), the eponymous "Hayem-Widal syndrome" is named, which is an historical term for acquired hemolytic anemia. Also, he introduced an intravenous solution of saline for treatment of

Asiatic cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...

. In 1872 he founded the ''Revue des sciences médicales en France et à l’étranger''.

Principal writings

* ''Recherches sur l’évolution des hématies dans le sang de l’homme et des vertébrés''. Archives de physiologie normale et pathologique, Paris, 1878, 5: 692–734. – First accurate counts of blood platelets. * ''Traitement du choléra'', G. Masson, Paris, 1885 – Treatment of

cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...

. * ''Du sang et ses altérations anatomiques'', G. Masson, Paris, 1889 – Anatomical changes in blood. * ''Lecons cliniques sur les maladies du sang'', G. Masson, Paris, 1900 – Clinical lessons on blood disorders. * ''L’hématoblaste, troisième élément du sang'', Paris, Presse univ. de France, 1923 – On hematoblasts.Bibliography of Georges Hayem
@ Who Named It

References

External links

*
''Georges Hayem''
@ Who Named It
The Free Dictionary
(Hayem's solution) French hematologists 1841 births 1933 deaths Physicians from Paris {{France-med-bio-stub