A METHOD FOR SERIAL SAMPLING OF BLOOD DURING SLEEP
JAMES L. MATHIS M.D.1,
BOYD K. LESTER M.D.2, , and
CHESTER M. PIERCE M.D.2
1 Resident in psychiatry, University of Oklahoma School of Medicine, Oklahoma City, Okla.
2 Assistant professor of psychiatry, University of Oklahoma School of Medicine, Oklahoma City, Okla.
An indwelling polyethylene tube in a large superficial vein offers a simple, safe, economical technique for obtaining serial blood samples without disturbing a sleeping subject. This permits study of hematological correlates of depth of sleep, diurnal and other periodic changes, and episodes of dreaming.
