Interference No. 103,197
requirements. Basically, the instrument consists of a 5-
F-diam[eter] bundle of rigid, fused fibers in a standard
15-19 gage hypodermic needle. [Our emphasis.]
Kapany goes on to explain (p. 186, 2d full para.) that
Figure 7.16 shows several techniques for illuminating the
tissue under examination, including a transillumination
technique (see Fig. 16(b)) that employs two axially aligned
hypodermic probes, one for supplying illuminating radiation to
the tissue and the other to receive the radiation that is
transmitted through the tissue region. Kapany notes that
because in most subcutaneous tissues gross changes in color or
composition are not observable, such tissues are ordinarily
observed under a polarizing microscope, phase contrast
microscope, or interference microscope (p. 188, lines 15-18).
It is also possible to stain subcutaneous tissue using a very
narrow auxiliary channel in the hypodermic probe (p. 188,
lines 20-22) or to use the probe in the fluorescence mode by
ultraviolet radiation (p. 188, lines 26-30).
Section 2 does not discuss using hypodermic probes for
spectrophotometry in general or for oximetry in particular.
Instead, those applications are described in Section 3, which
spans pages 188-97, and begins as follows:
- 14 -
Page: Previous 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Next
Last modified: November 3, 2007