| 摘要 |
A magnifying element (13) is provided in conjunction with a cannula hub (50) to afford an enlarged visual image of the contents in the passageway (16) of the cannula hub (50). More specifically, magnifying elements (13) are employed in conjunction with a transparent cannula hub (50) to enlarge the flashback of blood through a cannula (10) to indicate proper placement of a cannula (10) into a blood vessel of a patient. |
