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Injection volume and intracameral moxifloxacin dose.
Journal of Cataract & Refractive Surgery ( IF 2.8 ) Pub Date : 2019-08-20 , DOI: 10.1016/j.jcrs.2019.04.020
Neal H Shorstein 1 , Susanne Gardner 2
Affiliation  

PURPOSE To test the effect of injection volume and concentration on dosing and residence time of moxifloxacin in the anterior chamber (AC). SETTING Kaiser Permanente, Walnut Creek, California, USA. DESIGN Experimental study. METHODS Moxifloxacin 0.5%/0.05 mL, moxifloxacin 0.5%/0.10 mL, and moxifloxacin 0.15%/0.50 mL were drawn into 5 1.0 mL syringes each, injected into tared vials, and weighed. The doses delivered were calculated. The AC concentrations and elimination rates of the drug for two AC volumes were modeled for each dosing method. RESULTS The 0.05 mL injection volume resulted in the greatest range (35 μg) of delivered dose compared with larger injection volumes (≤25 μg). The mathematical model predicted that variation in dosing in each group would result in differences of 12 minutes or less for the presence of the drug in the AC. Injection of 0.5%/0.1 mL produced AC concentrations above 500 μg/mL for 1.9 to 3.0 hours and above 64 μg/mL for 5.5 to 6.5 hours, depending on the AC volume; however, flushing with a 0.15% concentration sustained AC levels for 1.9 hours and 5.5 hours, respectively, for the two AC volumes. CONCLUSIONS Smaller injection volumes of a higher concentration moxifloxacin resulted in less accuracy and less precision in the delivered dose (0.05 mL, P = .005; 0.10 mL, P = .03); however, the clinical significance of this might vary. Injection of 0.5%/0.1 mL and flushing with 0.15%/0.5 mL of moxifloxacin would provide similar drug AC residence times according to the model. Flushing provided more consistent AC concentrations with differing AC volumes.

中文翻译:

注射量和前房内莫西沙星剂量。

目的测试注射量和浓度对莫西沙星在前房(AC)中给药和停留时间的影响。设置地点:美国加利福尼亚州核桃溪,Kaiser Permanente。设计实验研究。方法将莫西沙星0.5%/ 0.05 mL,莫西沙星0.5%/ 0.10 mL和莫西沙星0.15%/ 0.50 mL分别抽入5个1.0 mL注射器中,注射入去皮的小瓶中并称重。计算所递送的剂量。针对每种给药方法,对两个交流体积的药物的交流浓度和消除速率进行了建模。结果与较大的注射量(≤25μg)相比,0.05 mL的注射量导致最大的给药剂量范围(35μg)。数学模型预测,由于AC中存在药物,每组剂量的变化将导致12分钟或更短的差异。注入0.5%/ 0.1 mL产生的AC浓度在1.9至3.0小时内高于500μg/ mL,而在5.5至6.5小时内则高于64μg/ mL,具体取决于AC体积;但是,对于两个交流体积,用0.15%的浓度冲洗分别保持1.9个小时和5.5个小时的交流水平。结论较高浓度的莫西沙星的较小注射量会导致递送剂量的准确性降低和准确性降低(0.05 mL,P = .005; 0.10 mL,P = .03);但是,其临床意义可能会有所不同。根据模型,注射0.5%/ 0.1 mL并用0.15%/ 0.5 mL的莫西沙星冲洗将提供相似的药物AC停留时间。冲洗可以在不同的交流体积下提供更一致的交流浓度。5至6.5小时,具体取决于交流电量;但是,用0.15%的浓度冲洗,两个AC体积的AC水平分别为1.9小时和5.5小时。结论较高浓度的莫西沙星的较小注射量会导致递送剂量的准确性降低和准确性降低(0.05 mL,P = .005; 0.10 mL,P = .03);但是,其临床意义可能会有所不同。根据模型,注射0.5%/ 0.1 mL并用0.15%/ 0.5 mL的莫西沙星冲洗将提供相似的药物AC停留时间。冲洗可以在不同的交流体积下提供更一致的交流浓度。5至6.5小时,具体取决于交流电量;但是,对于两个交流体积,用0.15%的浓度冲洗分别保持1.9个小时和5.5个小时的交流水平。结论较高浓度的莫西沙星的较小注射量导致递送剂量的准确性降低和准确性降低(0.05 mL,P = .005; 0.10 mL,P = .03);但是,其临床意义可能会有所不同。根据模型,注射0.5%/ 0.1 mL并用0.15%/ 0.5 mL的莫西沙星冲洗将提供相似的药物AC停留时间。冲洗可以在不同的交流体积下提供更一致的交流浓度。结论较高浓度的莫西沙星的较小注射量会导致递送剂量的准确性降低和准确性降低(0.05 mL,P = .005; 0.10 mL,P = .03);但是,其临床意义可能会有所不同。根据模型,注射0.5%/ 0.1 mL并用0.15%/ 0.5 mL的莫西沙星冲洗将提供相似的药物AC停留时间。冲洗可以在不同的交流体积下提供更一致的交流浓度。结论较高浓度的莫西沙星的较小注射量会导致递送剂量的准确性降低和准确性降低(0.05 mL,P = .005; 0.10 mL,P = .03);但是,其临床意义可能会有所不同。根据模型,注射0.5%/ 0.1 mL并用0.15%/ 0.5 mL的莫西沙星冲洗将提供相似的药物AC停留时间。冲洗可以在不同的交流体积下提供更一致的交流浓度。
更新日期:2019-08-20
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