A nurse is preparing to administer ephedrine 3 mg\/kg\/day IV bolus divided in equal doses every 6 hr to a school-age child who weighs 70 lb. Available is ephedrine injection 50 mg\/mL. How many mL should the nurse administer per dose?<\/p>\n\n\n\n
(Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n To determine the correct volume of ephedrine to administer per dose to a school-age child weighing 70 pounds, we first need to convert the child’s weight from pounds to kilograms, as the medication dosage is specified in mg\/kg\/day.<\/p>\n\n\n\n 1 kg is approximately 2.2 lb. Therefore, to convert the weight:Weight in kg=70 lb2.2 lb\/kg\u224831.82 kg\\text{Weight in kg} = \\frac{70 \\text{ lb}}{2.2 \\text{ lb\/kg}} \\approx 31.82 \\text{ kg}Weight in kg=2.2 lb\/kg70 lb\u200b\u224831.82 kg<\/p>\n\n\n\n The prescribed dosage is 3 mg\/kg\/day. We can calculate the total daily dose:Total Daily Dose=3 mg\/kg\u00d731.82 kg\u224895.46 mg\/day\\text{Total Daily Dose} = 3 \\text{ mg\/kg} \\times 31.82 \\text{ kg} \\approx 95.46 \\text{ mg\/day}Total Daily Dose=3 mg\/kg\u00d731.82 kg\u224895.46 mg\/day<\/p>\n\n\n\n The medication is to be administered every 6 hours, which means there are 4 doses in a day. To find the dose for each administration, we divide the total daily dose by the number of doses:Dose per administration=95.46 mg4\u224823.86 mg\\text{Dose per administration} = \\frac{95.46 \\text{ mg}}{4} \\approx 23.86 \\text{ mg}Dose per administration=495.46 mg\u200b\u224823.86 mg<\/p>\n\n\n\n Next, we need to find out how many mL correspond to the calculated dose of 23.86 mg. The concentration of the available ephedrine injection is 50 mg\/mL. To calculate the volume to be administered, we use the formula:Volume (mL)=Dose (mg)Concentration (mg\/mL)\\text{Volume (mL)} = \\frac{\\text{Dose (mg)}}{\\text{Concentration (mg\/mL)}}Volume (mL)=Concentration (mg\/mL)Dose (mg)\u200b<\/p>\n\n\n\n Substituting the values we have:Volume=23.86 mg50 mg\/mL=0.4772 mL\\text{Volume} = \\frac{23.86 \\text{ mg}}{50 \\text{ mg\/mL}} = 0.4772 \\text{ mL}Volume=50 mg\/mL23.86 mg\u200b=0.4772 mL<\/p>\n\n\n\n When rounding to the nearest hundredth, we get:Volume=0.48 mL\\text{Volume} = 0.48 \\text{ mL}Volume=0.48 mL<\/p>\n\n\n\n The nurse should administer 0.48 mL<\/strong> of ephedrine per dose to the child. This calculation ensures the child receives the appropriate medication dose based on their weight, adhering to safe and effective nursing practices.<\/p>\n","protected":false},"excerpt":{"rendered":" A nurse is preparing to administer ephedrine 3 mg\/kg\/day IV bolus divided in equal doses every 6 hr to a school-age child who weighs 70 lb. Available is ephedrine injection 50 mg\/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest hundredth. Use a leading zero if it applies. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-140830","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/140830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=140830"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/140830\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=140830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=140830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=140830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Step 1: Convert Weight to Kilograms<\/h3>\n\n\n\n
Step 2: Calculate Total Daily Dosage<\/h3>\n\n\n\n
Step 3: Calculate the Dosage per Administration<\/h3>\n\n\n\n
Step 4: Determine the Volume to Administer<\/h3>\n\n\n\n
Step 5: Round to the Nearest Hundredth<\/h3>\n\n\n\n
Conclusion<\/h3>\n\n\n\n