Sisk A L
Department of Oral and Maxillofacial Surgery, Medical College of Georgia School of Dentistry, Augusta 30912-1270.
Anesth Prog. 1992;39(6):187-93.
Addition of a vasoconstrictor to a local anesthetic may have several beneficial effects: a decrease in the peak plasma concentration of the local anesthetic agent, increase in the duration and the quality of anesthesia, reduction of the minimum concentration of anesthetic needed for nerve block, and decrease of blood loss during surgical procedures. The addition of a vasoconstrictor to a local anesthetic may also have detrimental effects. A review of the literature indicates that vasoconstrictor concentrations in local anesthetics marketed for dental use in the United States are not always optimal to achieve the purposes for which they are added. In most cases, a reduced concentration of vasoconstrictor could achieve the same goal as the marketed higher concentration, with less side-effect liability.
降低局部麻醉剂的血浆峰值浓度、延长麻醉持续时间并提高麻醉质量、降低神经阻滞所需的最低麻醉剂浓度以及减少手术过程中的失血量。在局部麻醉剂中添加血管收缩剂也可能有有害影响。文献综述表明,在美国销售的用于牙科的局部麻醉剂中的血管收缩剂浓度并不总是能达到添加它们的最佳效果。在大多数情况下,降低血管收缩剂的浓度可以达到与市售高浓度相同的目标,且副作用更小。