| 摘要 |
<p>A probe for locating an endo-tracheal or endo-oesophageal tube in the trachea or oesophagus, comprises an elongate body (1) having a distal end (2) for insertion into the trachea or oesophagus of a patient, and a proximal end (10) adapted to remain external to the patient in use. A pair of electrodes (3, 4) is circumferentially spaced about the probe body, at or near the said distal end (2), and electrical conductors (5) lead between the electrodes (3, 4) and proximal end of the probe. The arrangement of the electrodes (3, 4) is such that the impedance measured between the conductors at the proximal end of the probe varies in dependance upon whether the prove is located in the oesophagus or the trachea of a patient. The probe may be a guide probe for the endo-tracheal or endo-oesophageal tube, or may itself be an endo-oesophageal tube which it is desired to insert.</p> |
