Research results are very important for many fields of engineering. Technical reports are used to describe research results. Biomedical engineers may not typically look for these reports but there have been medical studies done that are shown in these major sources. For example:
Medicare: Trends in Beneficiaries Served and Hospital Resources Used in Implantable Medical Device Procedures. General Accounting Office, Washington, D.C. May 2012. 21 p. GAO-12-583R.
Structural Evaluation of Radially Expandable Cardiovascular Stents Encased in Polyurethane Film. Trigwell, Steve; De, Samiran; Sharma, Rajesh; Mazumder, Malay K.; Mehta, Jawahar L. NASA. Kennedy Space Center, 2004. 34 p. KSC-2004-143.