MEDICAL TREATMENT INSTRUMENT
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United States of America Patent
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N/A
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N/A
app pub date -
Jul 20, 2016
filing date -
Aug 19, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A medical treatment instrument includes a sheath, a needle advanceably and retractably inserted into the sheath, and a stylet having a first outer diameter and advanceably and retractably inserted into the needle. A distal end portion of the needle includes a housing portion, a small-diameter portion provided at a proximal end of the housing portion and having an inner diameter smaller than that of the housing portion, and a slit extending at least from a distal end of the housing portion to a proximal end of the small-diameter portion. A distal end portion of the stylet includes a large-diameter portion having a second outer diameter larger than the first outer diameter. The small-diameter portion and the housing portion are elastically deformed to expand in a radial direction of the needle while a width of the slit expands by the large-diameter portion being engaged with the small-diameter portion.
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