Hairy cell leukemia (HCL) 1  Is a type of blood cancer that begins in the bone marrow. 2  Is a rare type of leukemia in adults.  Hairy cell leukemia gets its name from the short, thin projections that look like hair on its cells.
In 1799 Humphrey Davy discovered anesthetic properties of nitrous oxide (N20)---also known as laughing gas.. He had recently joined Thomas Beddoesâ Pneumatic Institution (established 1798) for treatment of disease by inhalation.
Anesthesia for Cataract Surgery Go to Academy Store Learn more and Purchase. Historically, cataract surgery was performed without anesthesia. Karl Koller used topical cocaine anesthesia of the limbus in the late 1800s. Retrobulbar anesthesia was first described in 1884 by Herman Knapp, who injected 4% cocaine for ocular anesthesia prior to enucleation surgery. The modern technique of retrobulbar anesthesia, described in 1945 by Walter Atkinson, allowed the evolutionary advances of peribulbar and sub-Tenon anesthesia.