I was able to locate some documentation for the IBM 7690 Clinical Workstation.
Two manuals:
Guide to Operations – IBM 7690 Clinical Workstation (1989) SA12-7007-00
Technical Reference – IBM 7690 Clinical Workstation (1989) SA12-7009-00
There was also one 3.5″ diskette labeled “IBM7670 Clinical Workstation Customer – Level Diagnostic Diskette (Version 1.10). The next step is to make an archive the diskette.