| http://www.w3.org/ns/prov#value | - Also, in the second embodiment, instrument 60 disposed in central lumen 29 has hollow needle 61 as an end effector (which is advanced distally in FIG. 6) for piercing an organ or other tissue to permit the withdrawal of fluid, irrigation, or dispensing of medicaments such as anesthesia, through a hollow channel formed in instrument 60 and port valve combination 68.
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