Sources
While primary sources describing the procedures and presenting theoretical arguments for and against bloodletting are plentiful, descriptions of the instruments and their manufacture are often difficult to find. Before the nineteenth century, one may find illustrations of bloodletting instruments in the major textbooks on surgery, in encyclopedias such as that of Diderot, and in compendia of surgical instruments written by surgeons. The descriptions following the drawings are often meager and give little indication of where, when, and how the instruments were produced. Until well into the nineteenth century, the tools used by barber-surgeons, surgeons, and dentists were made by blacksmiths, silversmiths, and cutlers. These craftsmen generally left little record of their work. As the demand for surgical instruments increased, specialized surgical instrument makers began to appear, and the cutler began to advertise himself as “Cutler and Surgical Instrument Maker” rather than simply “Cutler and Scissor Grinder.” A few advertising cards dating from the eighteenth century may be found, but the illustrated trade catalog is a product of the nineteenth century. Among the earliest compendia/catalogs of surgical instruments written by an instrument maker, rather than by a surgeon, was John Savigny’s A Collection of Engravings Representing the Most Modern and Approved Instruments Used in the Practice of Surgery (London, 1799). This was followed a few decades later by the brochures and catalog (1831) of the famous London instrument maker, John Weiss. By the 1840s John Weiss, Charrière of Paris, and a few other instrument makers had begun to form surgical supply companies that attempted to market instruments over a wide area. While there are a handful of company trade catalogs dating from the 1840s, 1850s, and 1860s, the great influx of such catalogs came after 1870. Trade catalogs, a major source of information on the new instruments of the nineteenth century, provide the historian with line drawings, short descriptions indicating the mechanism and the material of which the instrument was composed, prices, and patent status. For more details on nineteenth-century instruments one must turn to brochures and articles in medical journals introducing the instruments to the medical profession. These sources provide the most detailed descriptions of how the instruments were constructed, how they were used, and why they were invented. For many American instruments, the descriptions available at the U.S. Patent Office offer illustrations of the mechanism and a discussion of why the instrument was considered novel. One finds specifications for many bizarre instruments that never appear in trade catalogs and may never have been actually sold.
A final source of information is the instruments themselves. Some are engraved with the name of the manufacturer, and a few are even engraved with the date of manufacture. Some have been taken apart to study the spring mechanisms and others examined in the Conservation Analytical Laboratory of the Smithsonian Institution to determine their material content. The documentation accompanying the instruments, while sometimes in error, may serve to identify the individual artifact by name, place and date of manufacture, and to augment our knowledge of the historical setting in which these instruments were used.
Bleeding: The History
The history of bloodletting has been marked by controversy. The extensive literature on bloodletting contains numerous polemical treatises that both extol and condemn the practice. Bloodletting was no sooner criticized as ineffective and dangerous than it was rescued from complete abandonment by a new group of zealous supporters.
From the time of Hippocrates (5th century B.C.)—and probably before, although no written record is available—bloodletting had its vocal advocates and heated opponents. In the 5th century B.C. Aegimious of Eris (470 B.C.), author of the first treatise on the pulse, opposed venesection, while Diogenes of Appolonia (430 B.C.), who described the vena cava with its main branches, was a proponent of the practice. Hippocrates, to whom no specific text on bloodletting is attributed, both approved and recommended venesection.[3]
The anatomist and physician Erasistratus (300-260 B.C.), was one of the earliest physicians to leave a record of why he opposed venesection, the letting of blood from a vein. Erasistratus, who practiced at the court of the King of Syria and later at Alexandria, a celebrated center of ancient medicine, recognized that the difficulty in estimating the amount of blood to be withdrawn and the possibility of mistakenly cutting an artery, tendon, or nerve might cause permanent damage or even death. Since Erasistratus believed that only the veins carried blood while the arteries contained air, he also feared the possibility of transferring air from the arteries into the veins as a result of venesection. Erasistratus was led to question how excessive venesection differed from committing murder.[4]
Through the writings of Aulus Cornelius Celsus (25 B.C.-?), the Roman encyclopedist, and Galen (ca. A.D. 130-200) venesection was restored as a form of orthodox medical treatment and remained so for the next fifteen hundred years. By the time of Celsus, bloodletting had become a common treatment. Celsus remarked in his well-known account of early medicine: “To let blood by incising a vein is no novelty; what is novel is that there should be scarcely any malady in which blood may not be let.”[5] Yet criticism of bloodletting continued, for when Galen went to Rome in A.D. 164 he found the followers of Erasistratus opposing venesection. Galen opened up discussion with these physicians in two books, Against Erasistratus and Against the Erasistrateans Dwelling in Rome. These argumentative dialectical treatises, together with his Therapeutics of Venesection, in which he presented his theory and practice of venesection, established Galen’s views on bloodletting, which were not effectively challenged until the seventeenth century.[6]
The fundamental theory upon which explanations of health and disease were based, which had its inception in ancient Greek thought and lasted up to the eighteenth century, was the humoral theory. Based on the scientific thought of the Pre-Socratics, the Pythagoreans, and the Sicilians, this theory posited that when the humors, consisting of blood, phlegm, yellow bile, and black bile, were in balance within the body, good health ensued. Conversely, when one or more of these humors was overabundant or in less than adequate supply, disease resulted. The humors were paired off with specific qualities representing each season of the year and the four elements according to the well-accepted doctrine of Empedocles, in which all things were composed of earth, air, fire, and water. Thus, yellow bile, fire, and summer were contrasted to phlegm, water, and winter, while blood, air, and spring were contrasted to black bile, earth, and autumn. When arranged diagrammatically, the system incorporating the humors, elements, seasons, and qualities appears as shown in Figure [1]. The earliest formulation of humoralism was to be found in the physiological and pathological theory of the Hippocratic treatise, On the Nature of Man.[7]
Plethora, an overabundance of body humors, including blood, which characterized fevers and inflammations, was properly treated by encouraging evacuation. This could be done through drugs that purged or brought on vomiting, by starvation, or by letting blood. During starvation the veins became empty of food and then readily absorbed blood that escaped into the arteries. As this occurred, inflammation decreased. Galen suggested that instead of starvation, which required some time and evacuated the system with much discomfort to the patient, venesection should be substituted to remove the blood directly.[8]