Measure of the Heart: Santorio Santorio and the Pulsilogium

TL;DR

Santorio Santorio's 1626 pulsilogium was an innovative device that used pendulum principles to accurately measure pulse rate, exemplifying early scientific efforts to quantify physiological phenomena during a period of rapid scientific advancement.

Contribution

The paper highlights Santorio's pioneering use of pendulum physics in medical measurement, linking early scientific principles to physiological instrumentation.

Findings

Introduction of the pulsilogium as an early pulse measurement device

Application of Galileo's pendulum insights to medical instrumentation

Contextualization of Santorio's work within the scientific developments of the 17th century

Abstract

In 1626, the Venetian physician Santorio Santorio published the details of his pulsilogium, a stop clock that could accurately measure one's pulse rate. He applied Galileo Galilei's insights that the frequency of a pendulum's oscillation is inversely proportional to the square root of its length. Santorio's inventions emerged at a time when the natural world and our solar system were beginning to be mapped in remarkable detail. Santorio was a true representative of his era, a period in which scientific developments came in rapid succession and measurements to support hypotheses became the norm.