Edlich R F, Smith J F, Mayer N E, Farris B L, Chang D E, Morgan R F, Thacker J G
J Emerg Med. 1987;5(2):83-90. doi: 10.1016/0736-4679(87)90069-2.
The performance of different disposable needle syringe systems was determined by measuring needle-puncture pain, needle-bending forces, and the fluid dynamics of the systems. Thirty-gauge needles cause less needle-puncture pain than any other needle. The force required to bend the 30-gauge needle irreversibly was lower than that for the other needles. Studies of the fluid dynamics of different needle syringe assemblies demonstrated that the flow rate can be limited by using large-size syringes (30 mL) and needles with the smallest internal diameter. On the basis of the results of this study, 30-gauge needles attached to 10-mL syringes are recommended for infiltration anesthesia, and 25-gauge needles with 10-mL syringes are advocated for regional nerve blocks. In infiltration anesthesia, the local anesthetic agent should be injected slowly into the subdermal tissue over a 10-second period. When performing regional nerve blocks, it is also advisable to inject the local anesthetic agent over a 10-second time interval.
通过测量针刺疼痛、针弯曲力和系统的流体动力学来确定不同一次性针筒注射器系统的性能。30号针引起的针刺疼痛比其他任何针都要小。使30号针不可逆弯曲所需的力低于其他针。对不同针筒注射器组件的流体动力学研究表明，使用大尺寸注射器（30 mL）和内径最小的针可以限制流速。根据本研究结果，建议在浸润麻醉时使用连接10 mL注射器的30号针，在区域神经阻滞时提倡使用连接10 mL注射器的25号针。在浸润麻醉中，应在10秒内将局部麻醉剂缓慢注入皮下组织。进行区域神经阻滞时，同样建议在10秒的时间间隔内注射局部麻醉剂。
