| 摘要 |
The end of a bronchoalveolar lavage catheter is coupled to an adaptor manifold which has a pressure port that allows communication to occur between the lumen at the center of the bronchoalveolar lavage catheter and an air pressure tube leading to a pressure transducer. Air pressure impulses from the air passageways of a patient are then communicated to the pressure transducer and converted into electronic signals capable of providing useful feedback to medical personnel. One form of feedback constitutes real-time pressure waveforms which are monitored to detect the existence at the tip of the bronchoalveolar lavage catheter of significant wedging-related conditions of interest to medical personnel attempting to effect wedging of the distal tip of the bronchoalveolar lavage catheter. The significant wedging-related conditions comprise conditions of correct wedging, ineffectual wedging, precluded wedging and overwedging. The proximal end of the bronchoalveolar lavage catheter is manipulated on the basis of the predetermined wedging related conditions detected in order thereby to verify correct wedging prior to the infusion of sampling fluid.
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