A research worker
at the Cardeza Foundation at Jefferson Medical
College in Philadelphia, Pennsylvania, removes a
specimen of human bone marrow suspension to
perform a nuclear cell count.
An artificial artery,
made of polyester fiber, was being used in
vascular surgery in 1958. The implanted tube
carries the blood and prevents the forming of
thrombi which block blood flow, while allowing
thegrowth of connective tissue through the
interstices of the woven material to hold the
prosthesis in place.