| 摘要 |
<p>In order to check that a change in a reading obtained from a side sample chamber (24, 26) of a fibre optic probe inserted in a blood vessel (2) is not due to wall effect, the fibre optic probe (3) is first rotated in one sense and a reading obtained. The fibre optic probe (3) is then rotated by the same amount in the opposite sense and a further reading obtained. By comparing the readings it can be determined whether a change is due to the side sample chamber (26) resting against or coming into close proximity with the wall (7) of a blood vessel (2) or whether there is a change in the patient's condition. In a multi-sensor fibre optic probe the side sample chambers (24, 26; 31) are arranged in one area rather than arranged uniformly around the circumference of the probe.</p> |
