| 摘要 |
A tissue sampling device is provided. The tissue sampling device includes a single wire spirally wrapped at its half-length creating the backbone of the brush. This wire is partially covered in a hollow flexible tube, which is fixed in place. Located along the distal end portion of the wire is a brush with bristles that are used for collecting a tissue sample. The bristles are tapered from the distal end of the wire. An atraumatic bulb is located on the extreme distal end of the wire to protect the tissue during insertion. A handle is located on the extreme proximal end of the flexible tube. The flexible tube is contained within a sheath, wherein the sheath can be moved along the flexible tube to the distal end, to the atraumatic bulb, to cover the brush during insertion and after tissue collection. The sheath is moved back toward the proximal end of the flexible tube after the device has been inserted to the proper collection depth, exposing the brush and allowing for collection of a tissue sample. The flexible tube is scored in centimeter gradations from the atraumatic bulb on the distal end to the proximal end of the flexible tube. The gradations allow measurement of the insertion depth of the device when the device is inserted for tissue collection, and the brush exposure when the sheath is retracted.
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