| 摘要 |
<p>An indwelling needle according to the invention reliably prevents an accidental touch of an inner needle with a finger. The indwelling needle includes the inner needle, an inner needle hub, an outer needle, an outer needle hub, and a protector, wherein a sleeve for preventing retraction of the outer needle hub is provided outside the inner needle hub, the protector is movably provided outside the sleeve, a first engagement mechanism capable of engaging the protector in an advanced end position and a second engagement mechanism capable of engaging the protector in a retracted endposition are provided between the sleeve and the protector, an extending portion is provided on the outer needle hub to form an inserting portion in the extending portion, a retaining mechanism capable of preventing the protector from being withdrawn from the inserting portion is provided between the outer needle hub and the protector, the inner needle hub is retractable relative to the sleeve, a stopper mechanism for preventing further retraction of the inner needle hub when the inner needle hub is retracted relative to the sleeve to a predetermined position where an edge is inserted into the protector is provided between the inner needle hub and the sleeve, and when the inner needle hub is further retracted from the predetermined position, the protector is withdrawn from the inserting portion.</p> |
