The metric system is the principal system used in measurement for medications. Convert what is ordered to the same units or system of measure as what is available by using one of the methods presented in the chapter on converting. Drug Dosage Calculation Practice Quiz. It is primarily an individual decision. The formula presented in this chapter can be used when calculating dosages in the same system of measurement. Drug Dosage Calculation. Notice that the label on x is always the same as Q. When the dosage desired and the dosage on hand are in different systems, convert them to the same system before using the formula, using one of the methods learned for conversion. Some drug calculations may involve working out the volume of solution needed to give the required dose of a drug. For consistency and to avoid chances of error when Q is not 1, always include Q even with tablet and capsule problems. Some liquid medications may also express the quantity in amounts less than a milliliter, such as 2 mg per 0.5 mL. Think about what is a reasonable amount to administer, and calculate the dosage using the formula. Order: 0.375 mg p.o. If you need to calculate the dose of a given medication, use the following formula: dose = weight * dosage. What an excellent resource you have created for nursing students! Remember that it is usual to convert what is desired to what is available. of a medication. Dimensional Analysis 2. During the Quiz End of Quiz. Choose the identified equivalent. ), Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window), on Dosage Calculation Using the Formula Method, Identify the information from a calculation problem to place into the formula given, Calculate medication dosages using the formula, Calculate the number of tablets or capsules to administer, Calculate the volume to administer for medications in solution. o Test-takers may use a basic calculator that does not store data. 4 0 obj
Therefore x = 2 tabs. Memorize the formula, or verify the formula from a resource. Rule for Different Units or Systems of Measure x = The unknown, the dosage you are looking for, the dosage you are going to administer, how many milliliters, tablets, etc. Play as . bottle (drug concentration or number of mL of fluid). 2.Dosage? Whenever the desired amount and the dosage on hand are in different units or systems of measure, follow these steps: 2. The label on. Omitting Q here could result in an error. you will give. The medication label shows that 75-150 mg/kg per day is the appropriate dosage range. Calculate medication dosages using the formula DH×Q=x You will learn, for example, that the maximum number of tablets or capsules for a single dosage is usually three. The available dosage on the label for liquid medications may indicate the quantity of medication per 1 milliliter or per multiple milliliters of solution, such as 80 mg per 2 mL, 125 mg per 5 mL. When converting before calculating a dosage, convert apothecary and household measurements to their metric equivalents when possible. This is a dosage calculations course to prepare students to calculate dosages and administer medications safely with the various routes throughout the body. Registration: Cancellation/Refund. “Q” is labeled accordingly as tablet, capsule, milliliter, etc. Convert what is ordered to the same units or system of measure as what is available by using one of the methods presented in the chapter on converting. Solution: This nursing test bank set includes 100+ questions broken down into four parts. After reviewing this chapter, you should be able to: 1. Think before you calculate. 6.Preferred Units for Liquid Dosage? DH × Q=x A liquid medication is involved; Q must be included because the amount varies and is not always per 1 mL. What is desired and what is available must be in the same units and system of measure. Label all terms of the formula, including “x,” as a safeguard to prevent errors in calculation. Ratio-Proportion 3. Pediatric Dosage Calculations - Displaying top 8 worksheets found for this concept.. Calculate medication dosages using the formula DH×Q=x, 3. Always estimate before applying a formula. Solution: Drug Dosage Calculation Formulas. • The dosage calculation competency test is given as a proctored assessment in the college's Testing Center, located in the Library in Martin Hall. Is this doctor's order within the desired range? Now that we have reviewed the terms in the formula, let’s review the steps for using the formula (Box 15-1) before beginning to calculate dosages using the formula. endobj
Calculating drug dosages is a very important skill for those in health care occupations. Avoid Dosage Calculation Errors Calculate medication dosages using the formula DH×Q=x 3. Some liquid medications may also express the quantity in amounts less than a milliliter, such as 2 mg per 0.5 mL. Pediatric Dosage Calculations is a sample topic from the Davis's Drug Guide. 1. to calculate the dosage to administer. Find out what's in your I.V. NOTE Remember that you’re trying to find out the appropriate dose to take so it’s not a good idea to use an inaccurate value. Remember that it is usual to convert what is desired to what is available. endobj
Feedback. One way to tackle these types of questions is to set up a simple equation where X is the variable you are trying to find. Because the amount for “Q” can vary with liquid medications and is not always 1, omission of the amount for “Q” can render an error in dosage calculation. CHAPTER 15 Convert gr ½ to mg. 2 0 obj
The desired (D) is 0.375 mg. You have on hand (H) 0.25 mg per (Q) 1 tablet. H = The dosage strength available, what is on hand, or the weight of the medication on the label, including the unit of measurement. What is desired and what is available must be in the, Dosage Calculation Using the Dimensional Analysis Method, Dosage Calculation Using the Ratio and Proportion Method. West nomogram. Solve the problem. Use the universal formula below and then divide your final answer by the patient's weight in kg to arrive at mcg/kg/minute. Dosage Calculations This unit looks at drug calculations. The desired (D) is 0.375 mg. You have on hand (H) 0.25 mg per (Q) 1 tablet. Available: 10,000 units in 2 mL Nursing Central is an award-winning, complete mobile solution for nurses and students. 3. Let’s calculate what would be a safe dose for her for both of these medications. Solution: It is imporant to learn and memorize the following formula: Let’s examine the terms in the formula before using it. What is desired is in the same system and unit of measure as what you have on hand. 8��O�|�s�. The pharmacy technician must have a full work- ing knowledge of how to perform these calculations. Learn dosage calculations with this free tutorial complete with explanations, examples, and practice questions. Nursing Calculations & IV Therapy For Dummies Cheat Sheet. Think logically, and consider what a reasonable amount to administer would be. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window)Like this:Like Loading... Identify the information from a calculation problem to place into the formula given Make sure to input your accurate weight! (Because 0.375 mg is larger than 0.25 mg, you will need more than 1 tab to administer 0.375 mg.) Note: Although 1.5 tabs is the same as 1½ tabs, for administration purposes, it would be best to state it as 1½ tabs. The bottle states dopamine 80… DH × Q=x DosageHelp.com: Helping Nursing Students Prepare for Medication Exams By Explaining Dosage Calculations: This website provides a dosage calculations tutorial, complete with explanations and examples, to help nursing students prepare for a medication exam. DH×Q=x %PDF-1.5
(D) gr 16(H) gr 12 × (Q) 1 mL=x mL Thinking first will allow you to detect errors and alert you to try again and question the results you obtained. 2. Thinking first will allow you to detect errors and alert you to try again and question the results you obtained. This quiz on weight-based dosage and calculations will test your ability to solve dosage and calculation problems of drugs that are based on a patient's weight. When you are solving problems that involve solid forms of medication (tabs, caps), Q is always 1 and can be eliminated from the equation. 5. 5. Tags: Calculate with Confidence
STEPS FOR USE OF THE FORMULA NOTE Here are 13 categories you will be tested on with this quiz: The available dosage on the label for liquid medications may indicate the quantity of medication per 1 milliliter or per multiple milliliters of solution, such as 80 mg per 2 mL, 125 mg per 5 mL. 1. 2. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
3.Liquid Formulation - Medication amount (optional): 4.Liquid Formulation - Per volume (optional): 5.Preferred Units for Final Dosage? By Claire Boyd . This is because when such items are asked in examinations, an examinee is expected to calculate and compute drug dosages for their patients. O 2 Remaining in E-Cylinder Calculates how much O 2 is left according to flow rate. This carboplatin calculator (carboplatin dose calculator) estimates your total carboplatin dose (in mg) using the Calvert formula).The calculations are based on a person's estimated creatinine clearance level (found using the Cockcroft - Gault equation), and the targeted carboplatin AUC value.. We try our best to make our Omni Calculators as precise and reliable as possible. Medication label: 1 tablet = 250 mg. How many tablets should be administered daily? Place the information from the problem into the formula in the correct position, with all terms in the formula labeled correctly, including “, Make sure that all measures are in the same units and system of measure; if not, a conversion must be done. Order: gr 1/6 subcutaneous of a medication.
Students may NOT use the calculator function on their mobile phones. Make sure that all measures are in the same units and system of measure; if not, a conversion must be done before calculating the dosage. Included topics are dosage calculation, metric conversions, unit conversions, parenteral medications, and fluid input and output. REVIEW OF DOSAGE CALCULATION METHODS There are three basic methods for calculating medication dosages. When the dosage desired and the dosage on hand are in different systems, convert them to the same system before using the formula, using one of the methods learned for conversion. (Because 30 mg is a larger dosage than 15 mg, it will take more than 1 tab to administer the desired dosage.). When you are solving problems for medications in solution, the amount for Q varies and must always be included. No conversion is necessary. Tips for Clinical Practice To view other topics, please sign in or purchase a subscription. Identify the information from a calculation problem to place into the formula given 2. Convert gr ½ to mg. DOSAGE CALCULATIONS Doctors can prescribe medications in amounts that are not convenient to administer. Sequential Easy First Hard First. Examples: mg, g, etc. stream
FORMULA FOR CALCULATING DOSAGES Solution: Always estimate before applying a formula. Created by. Calculate the number of tablets or capsules to administer, 4. Read on to learn what the drug dosage calculation formula is and how to use it. Notice that the label on x is always the same as Q. Start. 6. Formula Method Each method will allow an accurate calculation of the medication dosage. Box 15-1 Steps for Using the Formula This chapter shows how to use a formula for dosage calculation, which requires substituting information from the problem into the formula. The available dosage on the label for liquid medications may indicate the quantity of medication per 1 milliliter or per multiple milliliters of solution, such as 80 mg per 2 mL, 125 mg per 5 mL. Fluid Requirements Calculates IV rate according to the type of surgery. Dosage (drug) calculations nursing comprehensive quiz for students! Q = The quantity or the unit of measure that contains the dosage that is available, in other words, the number of tablets, capsules, milliliters, etc. you will give. Critical Thinking Calculate the volume to administer for medications in solution. Errors can be made if you totally rely on a formula to determine a dosage rather than asking yourself whether the answer is reasonable. What is desired and what is available must be in the same units and system of measure. RULE Log In or Register to continue Dosage and Calculations Practice Tests are some of the most commonly-searched practice exams for both student nurses and nurses wanting to take licensure and certification exams.. Order: gr 1/6 subcutaneous of a medication. <>
Calculate the volume to administer for medications in… Available: Tablets labeled 15 mg Use formulas to validate the dosage you think is reasonable, not the reverse. that contains the available dosage. WordPress theme by UFO themes. Dosage Calculation Using the Formula Method Questions. Abbreviations rule the medical world. Examples: mg, g, etc. Created by. Available: gr ½ per mL (Express the answer to the nearest tenth. Please note that dose is provided in mg not mg/m 2. You may also needIntravenous CalculationsCalculation of Oral MedicationsDecimalsRatio and ProportionDosage Calculation Using the Dimensional Analysis MethodDosage Calculation Using the Ratio and Proportion MethodReading Medication LabelsMedication Administration Example 2: Calculate the number of tablets or capsules to administer 4. Dosage calculations based on body weight are required when the dosage ordered and administered is dependent on the weight of the patient. Feb 11, 2017 | Posted by admin in PHARMACY | Comments Off on Dosage Calculation Using the Formula Method
Multiple across the top line. Related It is imporant to learn and memorize the following formula: You will learn, for example, that the maximum number of tablets or capsules for a single dosage is usually three. Use formulas to validate the dosage you think is reasonable, not the reverse. After reviewing this chapter, you should be able to: 4. CAUTION Therefore change gr to mg; this will also eliminate the fraction and decrease the chance of error in calculation. CHAPTER 15 Dosage Calculation Using the Formula Method Objectives After reviewing this chapter, you should be able to: 1. By Richard Snyder, Barry Schoenborn . Formula: Weight in Kg * Dosage Per Kg = Y (Required Dosage) Example: A doctor orders 200 mg of Rocephin to be taken by a 15.4 lb infant every 8 hours. Think logically, and consider what a reasonable amount to administer would be. H = The dosage strength available, what is on hand, or the weight of the medication on the label, including the unit of measurement. What is desired is in the same system and unit of measure as what you have on hand. It is important to know the recognized abbreviations in clinical setting so you will not be lost when preparing medications for your patient. that contains the available dosage. When you are solving problems for medications in solution, the amount for Q varies and must always be included. This article will now look at some commonly used drug calculations and the way that mistakes can happen. Example 4: In this section are the practice problems and questions for drug dosage calculations. The label on x is tablet. Follow these four steps to easily calculate your patient's accurate drug dosage. kg lb. x��]m�㶑��U��)%�v8�+ ���}��w��k�/q��� ��HS�8K���F7������p�auyȾ��������ޝ_l?����O��V�7���f�����ū�ً��Oοa/�Bf�>aY����y�eV��J�?�����"��o�����'��v��٫�~u�Ζ��O��/�,����ӏ��X�K���w�x�Z��-|����[*���}�e�-��2��}j�������?��Gv��O���X�����RT���Jy/����n�}����,Ӌ�\܃�T�5z�6K���)[m�Wش�`Cנ�U]w?����^�ry��Q8�>~}�UL-gE�U(շH�j���ɖf�����%Ӌ�����[,��rO����dgЋ��..ߡu�+s.�� For example: You are asked to give a patient weighing 50 kg a 1 mg/kg IV injection. Because the amount for “Q” can vary with liquid medications and is not always 1, Label all terms of the formula, including “. “Q” is labeled accordingly as tablet, capsule, milliliter, etc. It is important to note that the unknown “x” and “Q” will always be stated in the same unit of measure. Formula Setup Label all answers—tabs, caps, mL, etc. Calculate your answer, using the formula. A liquid medication is involved; Q must be included because the amount varies and is not always per 1 mL.
Drug Absorption (Pka) Determines how well a medication will be absorbed into the body. Premium Wordpress Themes by UFO Themes Are you looking towards or preparing for becoming a medical assistant or nurse? Memorize the formula, or verify the formula from a resource. The formula presented in this chapter can be used when calculating dosages in the same system of measurement. Use critical thinking skills such as considering what the answer should be, reasoning, problem solving, and finding rational justification for your answer. Multiply across the bottom line. 4. The dosage 0.375 mg is desired; the dosage strength available is 0.25 mg per tablet. Therefore gr ½ = 30 mg. Now that you have everything in the same system and units of measure, use the formula presented to calculate the dosage to be administered. Convert what is ordered to the same units or system of measure as what is available by using one of the methods presented in the chapter on converting. They are vitally important to get right, yet so easy to get wrong. 2. A memorable formula. Quiz Flashcard. This carboplatin dosing calculator uses the Calvert method to calculate the total carboplatin dose needed to achieve a given AUC (area under the free carboplatin plasma concentration versus time curve) while taking into account renal function. Share on Pinterest . Anything exceeding that should be a red flag to you, even if the answer is obtained from the use of a formula. This chapter shows how to use a formula for dosage calculation, which requires substituting information from the problem into the formula. It is important to note that the unknown “x” and “Q” will always be stated in the same unit of measure. Dr. Rachel Silva DNP May 9, 2015 at 11:06 am. Therefore change gr to mg; this will also eliminate the fraction and decrease the chance of error in calculation. 1.Patient Weight? CAUTION Determine in which units your drug is measured (units/hour, mg/hour, or mcg/kg/minute). Rule for Different Units or Systems of Measure. BSA Calculator Calculates BSA according to height and weight. Let’s review a few standard conversions related to the metric system. Therefore x = 1.5 tabs, or 1½ tabs. 3. The most common system we will use is the metric system. The nurse should use the formula consistently and in its entirety to avoid calculation errors. It’s important to remember any time we do calculations we must have our measures in the same system and in the same sized units. 4. Do not rely solely on formulas when calculating dosages to be administered. Dosage calculations based on body weight are calculated in two main stages. (D) 0.375 mg(H) 0.25 mg × (Q) 1 tab=x tabx=0.3750.25 × 1x=0.3750.25x=1.5=1½ tabs When converting before calculating a dosage, convert apothecary and household measurements to their metric equivalents when possible. DH×Q=x Nursing Calculations & IV Therapy For Dummies Cheat Sheet; Cheat Sheet. Pediatric Dose Calculator Converts an adult dosage into a pediatric using BSA. No conversion is necessary.
The metric system is the principal system used in measurement for medications. Examples: mg, g, etc. And divide both of …
When you are solving problems that involve solid forms of medication (tabs, caps), Q is always 1 and can be eliminated from the equation. . Make sure that all measures are in the same units and system of measure; if not, a conversion must be done before calculating the dosage. Before I dive into each specific step, I just want to remind you to check out our Med Master course, which is the perfect compliment to this post about med math. Think logically, and consider what a reasonable amount to administer would be. To calculate the number of tablets, use the following formula: Strength required / Stock strength = Number of tablet(s) required. Difficulty. (D) 30 mg(H) 15 mg × (Q) 1 tab=x tabx=3015 × 1x=3015x=2 tabs, Therefore x = 2 tabs. D = The dosage desired, or what the prescriber has ordered, including the units of measurement. Order: gr ½ p.o. Available: gr ½ per mL (Express the answer to the nearest tenth.)
Adjust medication dose based on patient weight. Therefore gr ½ = 30 mg.
Examples: mg, g, etc. Dosage calculations include calculating the number of doses, dispensing quantities, and ingredient quantities; these calculations are performed in the pharmacy on a daily basis. This chapter shows how to use a formula for dosage calculation, which requires substituting information from the problem into the formula. It is important to note that the unknown “. The nurse should use the formula consistently and in its entirety to avoid calculation errors. No matter what initials you have after your name (RN, CNA, PA, and so on), you can bet you’ll see math on a daily basis if you’re going into (or are already in) a career in the medical field. Si US. Place the information from the problem into the formula in the correct position, with all terms in the formula labeled correctly, including “x.”. Use the formula Look up information on diseases, tests, and procedures; then consult the database with 5,000+ drugs or refer to 65,000+ dictionary terms. Errors can be made if you totally rely on a formula to determine a dosage rather than asking yourself whether the answer is reasonable. 3. The equivalent to use is 60 mg = gr 1. x = The unknown, the dosage you are looking for, the dosage you are going to administer, how many milliliters, tablets, etc. Patient Weight? For consistency and to avoid chances of error when Q is not 1, always include Q even with tablet and capsule problems. Example 1:
1. I certainly wish I could have had this to discover back when I was in nursing school (but we barely knew what computers were, haha). Q = The quantity or the unit of measure that contains the dosage that is available, in other words, the number of tablets, capsules, milliliters, etc. The dosage calculator finds what dose of a medication is appropriate for your weight. Whenever the desired amount and the dosage on hand are in different units or systems of measure, follow these steps: 1. (Because 0.375 mg is larger than 0.25 mg, you will need more than 1 tab to administer 0.375 mg.) Note: Although 1.5 tabs is the same as 1½ tabs, for administration purposes, it would be best to state it as 1½ tabs. Order: 7,000 units IM of a medication. This is a 3- hour course that will teach you how to calculate the correct dosage for medications. Step 6: Dosage Calculations; We also created a mind map to help you navigate through these steps easier, especially if you’re a visual person. Drug Dosage Calculation Test- (Practice Mode) 10 Questions | By Rnpedia | Last updated: Oct 6, 2020 | Total Attempts: 18989 . (D) 30 mg(H) 15 mg × (Q) 1 tab=x tabx=3015 × 1x=3015x=2 tabs For the dosage, this refers to the prescribed amount of the drug you plan to take in mg per kg of body weight. Label all answers—tabs, caps, mL, etc. Now that we have reviewed the terms in the formula, let’s review the steps for using the formula (Box 15-1) before beginning to calculate dosages using the formula. Anything exceeding that should be a red flag to you, even if the answer is obtained from the use of a formula. Omitting Q here could result in an error. Box 1.
Medical Dosage Calculations For Dummies Cheat Sheet . Label all terms of the formula, including “x,” as a safeguard to prevent errors in calculation. Use formulas to validate the dosage you think is reasonable, not the reverse. It's critical to know how to calculate the doses properly; improper doses cannot only not heal the patient, but could cause major complications and … It is expected that these computations are accurate. You will learn, for example, that the maximum number of tablets or capsules for a single dosage is usually three. The label on x is tablet. D = The dosage desired, or what the prescriber has ordered, including the units of measurement. Calculate the number of tablets or capsules to administer Or another way this drug dosage formula can be expressed is: What you want / What you’ve got = Number of tablet(s) required. The dosage 0.375 mg is desired; the dosage strength available is 0.25 mg per tablet. Here are the most commonly used abbreviations when preparing drugs: O.R. Formulas should be used as tools for validating the dosage you THINK should be given. How to Do Drug Dosage Calculations. Think before you calculate. Use critical thinking skills such as considering what the answer should be, reasoning, problem solving, and finding rational justification for your answer. Identify the information from a calculation problem to place into the formula given, 2. 1. Calculate the volume to administer for medications in solution (Because 30 mg is a larger dosage than 15 mg, it will take more than 1 tab to administer the desired dosage.) Available: Tablets labeled 0.25 mg 2. This drug calculations review contains questions that covers a wide variety of dosage calculations problems you will encounter on exams and on the job. 6. Objectives Calculate your answer, using the formula Next Question. Only gold members can continue reading. It can also recalculate the dosage expressed in mg/kg into doses of liquid medication. The global unit selector only affects unanswered questions. <>>>
Anything exceeding that should be a red flag to you, even if the answer is obtained from the use of a formula. The desired (D) is 0.375 mg. You have on hand (H) 0.25 mg per (Q) 1 tablet. These weight-based calculation problems were designed to help you better understand how to apply basic conversions to advanced drug problems. Formulas should be used as tools for validating the dosage you THINK should be given. These problems are a type of pediatric dosage calculations. Medical Dosage Calculations For Dummies Cheat Sheet; Cheat Sheet. 4. %����
When you are solving problems that involve solid forms of medication (tabs, caps), Q is always 1 and can be eliminated from the equation. The second formula used to calculate dosages is the body surface area (BSA) method. Errors can be made if you totally rely on a formula to determine a dosage rather than asking yourself whether the answer is reasonable. Know the patient's weight in kg if your calculation is weight based.
3. 3. … Now we will look at sample problems illustrating the use of the formula. Solution: 3 0 obj
Here is an example of how to calculate oral medication dosage using ratio and proportion: Doctor's order: 125 mg of medication once a day. 74 thoughts on “ Dosage calculations the easy way! Example: Dopamine is infusing. Example 3: Place the information from the problem into the formula in the correct position, with all terms in the formula labeled correctly, including “x.”. Memorize the formula, or verify the formula from a resource. ���&/;
��y�˰.��$�t������|�W�y�t�r�pڡl���,�Z��h� ���@�9�H�M·����2�T[��$/��%F�7w"�X��u������חo^e���A�,rUA*d�d&2&� The child’s weight is marked on the right scale, the height on the left scale. Drug calculations appear to be impossibly difficult, unless you break them down into small steps. Now that you have everything in the same system and units of measure, use the formula presented to calculate the dosage to be administered. No other items, such as paper, books, or electronic devices are permitted in the test room. The West nomogram, commonly used to calculate BSA, is a graph with several scales arranged so that when two values are known, the third can be plotted by drawing a line with a straight edge. Do not rely solely on formulas when calculating dosages to be administered. Now we will look at sample problems illustrating the use of the formula. The equivalent to use is 60 mg = gr 1. Because the amount for “Q” can vary with liquid medications and is not always 1, omission of the amount for “Q” can render an error in dosage calculation. Skills are then practiced in the nursing lab. Settings. Most health care professionals become comfortable with one method and use that method exclusively.
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Think about what is a reasonable amount to administer, and calculate the dosage using the formula. These are: 1. (D) 0.375 mg(H) 0.25 mg × (Q) 1 tab=x tabx=0.3750.25 × 1x=0.3750.25x=1.5=1½ tabs. For example, many pediatric drugs are ordered and given per weight (usually in kg). A tablet or liquid may contain a certain amount of active ingredient, and the prescription might be a multiple or a fraction of that amount. 1. Let’s examine the terms in the formula before using it. 2.
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Some liquid medications may also express the quantity in amounts less than a milliliter, such as 2 mg per 0.5 mL. endobj
Therefore x = 1.5 tabs, or 1½ tabs.

dosage calculation formula 2020