NATURAL ART RESEARCH INSTITUTE, LTD.;KITAZATO CORPORATION
发明人:
INOUE, FUTOSHI,TERAMOTO, SHOKICHI
申请号：
CA2993426
公开号：
CA2993426A1
申请日:
2016.07.21
申请国别(地区):
CA
年份:
2017
代理人:
摘要：
A needle is formed in a three-part structure composed of a small-diameter tip part, a middle part and a large-diameter part, wherein the small-diameter tip part is fluid-communicated with the middle part through a first taper part and the middle part is fluid-communicated with the large-diameter part through a second taper part, the small-diameter tip part is so formed that the inner diameter is set at 0.35 mm or more on the basis of the allowable deviation of a cumulus cell, the outer diameter is set at 0.7 mm or less on the basis of the size of a small follicle and the inclination angle of an inclined tip and the length is set at 10 to 25 mm on the basis of the size of a dominant follicle, the inner diameter of the middle part is set at 0.45 mm or more on the basis of the size of a cumulus cell, the inner diameter of the first taper part is so set as to have an average grade of 10% or less in order to prevent the rapid deformation recovery of an oocyte-cumulus cell complex during suction, and the total length between the small-diameter tip part and the middle part is so set that the large-diameter part cannot penetrate through a tissue of a human body.
