| 摘要 |
A housing for a sensor apparatus for investigating characteristics of a blood vessel comprises a base for holding one or more sensor components, at least one appendage joined to the base and capable of being attached to the blood vessel by means of thread, and an attachment point for pulling means, wherein the at least one appendage is shaped or fabricated so as to allow the pull-removal of the housing from the blood vessel without removal of the thread from the blood vessel. Sensor apparatus for investigating the characteristics of a blood vessel comprises means for transmitting signals into the blood vessel along a first path and detecting signals returned from at least one pair of locations along the first path, wherein the apparatus further comprises means for determining from the signals whether there is a blood vessel wall between the locations of each pair.
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