| 摘要 |
<p>An injection needle has a puncture section having a small diameter that does not give a patient pain, injury, etc. and, moreover, does not make a patient feel fear and anxiety, a base end section with a large diameter to achieve a required flow rate and strength, and a tapered section connecting the puncture section and the base end section. The injection needle and a liquid introducing instrument can eliminate pain caused by a tapered section, and excellent puncture can be made with the needle and the instrument. An injection needle (1) has a puncture section (2) provided with a needle point that can be punctured into a living body, a base end section (3) having an outer and an inner diameter larger than the puncture section (2), a tapered section (4) connecting the puncture section (2) and the base end section (3). The tapered section (4) has smaller puncture resistance than the puncture section (2), or specifically, taper angle (A) is equal to or less than 2 degrees. <IMAGE></p> |
