| 摘要 |
A needle for use in injecting minute quantities of anaesthetic liquid subcutaneously, comprising a fine short needle (33) having a relatively thin diameter. The fine short needle (33) is mounted from a sheath (31) in flow relationship therewith. In one embodiment, the sheath (31) is mounted on the hub (37) of a standard needle (21) that serves to connect the fine short needle (33) in flow relationship with the contents of the syringe (22). Following the injection of a minute quantity of anaesthetic subcutaneously through the fine short needle (33) to anaesthetise the injection site, the sheath (31) is detached from the hub (37) of the standard needle (21), that is then available for use in injecting a larger volume of anaesthetic, but with less pain than if the standard needle (21) were used without the initial subdermal injection. |
