(under subclass 1) Subject matter wherein the instrument has combined therewith means for cooling contacted body tissue to extremely low temperatures.
(1) Note. Cryogenics is the study, production, and utilization of extremely low temperatures. To precisely define the cryogenic range is difficult since the literature ambiguously defines the upper limit to be from 220 degrees to 400 R (-240 to -60 F). For the purposes of this class, the cryogenic temperature range will be construed to vary between absolute zero and about 400 R.
SEE OR SEARCH CLASS
62, Refrigeration, appropriate subclasses, for cooling means, particularly
293, for hand manipulable tools.
607, Surgery: Light, Thermal, and Electrical Application,
96+, for noncryogenic instruments for cooling the body which are limited to therapeutic use.
