| 摘要 |
PURPOSE: To obtain a highly safe cannula favorable to administer a narcotic especially to an eye, by providing a longitudinal housing having a distal end part closed obtusely with an outlet at the lower face and a proximal end part having an expanded face for closing a tissue opening part of the eye. CONSTITUTION: This cannula 10 comprises a housing 12, a proximal end part part 14 for injecting a narcotic and a distal end part 16 for making the narcotic flow out of a distal outlet 18. The housing 12 has a flow path 36 formed along a longitudinal axis A, and its distal end is communicated with the opening 18 provided at the lower face 22. The distal end part 16 of the housing 12 is formed at an obtuse front ent part smoothly curved in all the directions, and the proximal end part includes a spherical part 24 extending from the upper face 20 outward at the side of the principal axial plane, and a standard luar 26 enabling the cannula to engage with a standard injector. The spherical part 24 constitutes a closed area for preventing the medicine administered from the housing 12 from flowing out by closing the opening part formed within the tissue constituting the eye. |
