[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR864.6600] [Page 221] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES--(Continued) PART 864--HEMATOLOGY AND PATHOLOGY DEVICES--Table of Contents Subpart G--Manual Hematology Devices Sec. 864.6600 Osmotic fragility test. (a) Identification. An osmotic fragility test is a device used to determine the resistance of red blood cells to hemolysis (destruction) in varying concentrations of hypotonic saline solutions. (b) Classification. Class I. The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter. [45 FR 60607, Sept. 12, 1980, as amended at 54 FR 25045, June 12, 1989]