| 摘要 |
An epidural injection needle with a larger-gauge proximal shaft ( 16, 30 ) that tapers in close proximity ( 20, 34 ) to a smaller-gauge distal tip ( 22, 38 ). A conventional stylet ( 10, 18, 32 ) of suitable material is employed to stiffen the needle and to prevent material from entering the needle during insertion. Wings ( 14 ) can be fitted to facilitate manual guidance of the needle. The short-tapered design provides an epidural injection needle having a shaft large and stiff enough so that it can be reliably guided to the epidural space but also having a small tip which minimizes trauma to blood vessels, nerves, and other tissues that may be inadvertently punctured during the procedure. This enables epidural injections to be safer for patients than those utilizing commercially available needles or prior-art designs.
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