This is an image preview.
Start a Free Account
to view the full image.

Sign Up for a Free Account For information on discounts, see Plans & Pricing

Nearly 3,000 illustrations, including video clips of neurologic disorders.
Every article is reviewed by our esteemed Editorial Board for accuracy and currency.
Full spectrum of neurology in 1,200 comprehensive articles.
Listen to MedLink on the go with Audio versions of each article.

Hemoglobin dissociation curve from the 1911 Anglo-American Expedition to Pikes Peak

Download

The continuous line represents the dissociation curve of oxyhemoglobin in the blood of British physiologist Claude Gordon Douglas (1882-1963) and John Scott Haldane, determined in Oxford in the presence of 40 mm pressure of CO2 at 38°C. The determinations made on Pikes Peak at 38° are indicated as follows: blood of Douglas and Haldane, respectively, in the presence of 28 mm pressure of CO2 (open and closed circles); blood of Douglas and Haldane, respectively, in the presence of 41 mm pressure of CO2 (x and +). (Source: Douglas CG, Haldane JS, Henderson Y, Schneider EC. Physiological observations made on Pike's Peak, Colorado, with special reference to adaptation to low barometric pressures. Philosophical Transactions of the Royal Society, Series A 1913;203:185-318.)