Sheath for a side view probe
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United States of America Patent
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Aug 24, 1999
Grant Date -
N/A
app pub date -
Mar 17, 1997
filing date -
Mar 17, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sheath for a side view probe having at least two complete hybrid optical and electrode systems on opposite faces of a cylinder, in order to obviate the need to manipulate the probe through more than a half revolution during examination by the doctor. The sheath covers the probe but allows both electrical and optical measurements to be made by the underlying probe on the same areas of tissue. The invention uses the hoop tension in the sheath to apply the needed spring force to maintain electrode contact. In addition, the probe and its sheath are shaped to ensure both good electrical contact and reliable optical pathways. A built-in means of calibration of the sheath enclosed probe is achieved by attaching to the outside of the tip of the sheath a tube or blocks of a turbid material such as a polymer of controlled composition. The tube or blocks of turbid material are removed prior to using the probe on a patient.
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