Various styles of insulin pumps may be utilized by people with diabetes to inject insulin into the body in a controlled, more convenient and discreet manner. Update Date: 06/17/2008Elizabeth H. Holt, MD, PhD, Assistant Professor of Medicine, Section of Endocrinology and Metabolism, Yale University. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.