| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an intradermal injector without causing a blister or bubble in or under the patient's skin when a substance is injected. <P>SOLUTION: The injector includes a chamber 58 configured for containing a substance to be injected and a needle 48 operatively associated with the chamber and having a length sufficient to deliver the substance to an intradermal injection site. A collar surrounds the needle 48 and defines collar cavity. The collar also has a peripheral forward skin-contacting surface that surrounds and is radially spaced from the needle 48 and injection site by an area that is sufficiently large to allow a patient's skin to move into the collar cavity to properly position the needle 48 for intradermal delivery of the substance to the injection site to allow spread of the injected substance under the skin while inhibiting or preventing backpressure within the skin from forcing the substance out through the injection site. <P>COPYRIGHT: (C)2012,JPO&INPIT |
