剂量计算:给药量等于医嘱剂量除以现有药物的规格,再乘以该规格对应的量:给药量 = (医嘱剂量/储备规格) × 储备体积。始终统一单位(先把 g 换成 mg,mg 换成 mcg),并检查答案是否合理。
剂量
7.5·60 = 450 mg
答案
D = 450 mg
4.剂量计算
答案: V = 4.8 mL
剂量计算:给药量等于医嘱剂量除以现有药物的规格,再乘以该规格对应的量:给药量 = (医嘱剂量/储备规格) × 储备体积。始终统一单位(先把 g 换成 mg,mg 换成 mcg),并检查答案是否合理。
按体重计算剂量
10·24 = 240 mg
体积
V = (240/250)·5 = 4.8 mL
答案
V = 4.8 mL
5.静脉输液速度
答案: R = 200 gtt/min
Infusion rates: a pump is set in mL/h = volume/time in hours. A gravity drip is counted in drops per minute: gtt/min = volume (mL) × drop factor (gtt/mL)/time (min). The drop factor is printed on the tubing package: macrodrip sets deliver 10, 15 or 20 gtt/mL (blood sets often 10 gtt/mL in the US, 15 in the UK) and microdrip sets 60 gtt/mL. Always use the drop factor the question or package gives.
每分钟毫升数
200/60 = 3.333 mL/min
滴速
R = 3.333·60 = 200 gtt/min
答案
R = 200 gtt/min
使用微滴输液器(60 gtt/mL)时,gtt/min 等于 mL/h。
6.静脉输液速度
答案: D = 15 mcg/min
Dose-based infusions: concentration = amount of drug in the bag/bag volume. Pump rate (mL/h) = dose per hour/concentration, and dose per hour = mL/h × concentration. Convert per-minute doses to per-hour (× 60) and keep the mass units the same (1 g = 1000 mg, 1 mg = 1000 mcg).