Intravenous literature: Lee, P.T. (2012) Infusion pumps: gravity, technology and the health professional. British Journal of Nursing. 21(21), p.26.
On October 14 2012, Felix Baumgartner fell back to Earth at 834 mph; faster than a bullet from a gun. His rate of fall was down to gravity. Isaac Newton (1642-1727) documented this powerful force when he reportedly saw an apple fall perpendicularly from a tree. In the same century, William Harvey (c1628) and Sir Christopher Wren (c1652) shared their discoveries of the human circulatory system, intravenous access and IV infusions. The use of gravity as a natural resource for medication therapy may have found its humble beginnings.