Dosage Calculation - Dosage Question Steps

Source Website: http://www.dosagehelp.com/steps.html
By Dosagehelp.com

The following is an overview of the steps to take to complete each dosage problem.

Dosage Question Steps
1. Determine problem type:

• Mass/Liquid For Liquid
• Mass for Mass
• Dosage By Weight
• Volume/Time - IV Drop Rate
• Volume/Time - IV mL Rate
• Amount in IV Fluid
• Fluid Maintenance Requirement
• Mass/Time - IV mL Rate

2. Identify what is the value of each variable in formula.

3. Make units consistent as necessary.

4. Fill in values for formula and solve the problem.

Continue (to Mass/Liquid For Liquid Questions )



Reference
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html
[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html
[6] HTML Tables, by Tutorialspoint, http://www.tutorialspoint.com/html/html_tables.htm

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Dosage Calculation - Fluid Maintenance Requirement Questions

Source Website: http://www.dosagehelp.com/fluid_maintenance.html
By Dosagehelp.com

Fluid Maintenance Requirement Questions

Given the weight of a child or infant, calculate the necessary amount of fluid per day. Different hospitals may have different policies, but for learning how to perform these pediatric dosage calculations, the following commonly used table of fluid requirements may be used.

Weight Range	Required Daily Fluid
0-10 kg	100 mL per kg
10-20 kg	1,000 mL + 50 mL per each kg above 10 kg
20-70 kg	1,500 mL + 20 mL per each kg above 20 kg
Over 70 kg	2,500 mL (adult requirement)

Example: An infant weighs 4 kg. What is the required amount of fluid per day in mL?

0-10 kg

100 mL per kg

$$\mathbf{4\; kg}x\mathbf{100\; mL/kg}=\boxed{\mathbf{400\; mL}}$$

Example: An infant weighs 30.8 lb. What is the required IV flow rate in mL/hr to maintain proper fluid levels?
Convert 30.8 lb to kg.
    lb → kg    ( ÷ by 2.2 )
    30.8 lb ÷ 2.2 = 14 kg

10-20 kg

1,000 mL + 50 mL per each kg above 10kg

14 kg - 10 kg = 4 kg (There are 4 kg over 10 kg).
1,000 mL + (50 mL/kg x 4 kg) = 1,200 mL/day

This is now an ordinary IV Flow Rate - mL Rate Question. The required volume is 1,200 mL and the time is one day.

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (hr)}}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

There are 24 hours in one day.
1 day x 24 = 24 hr

$$\frac{\mathbf{1,200\; mL}}{\mathbf{24\; hr}}=\boxed{\mathbf{50\; mL/hr}}$$

Continue (to Mass/Time - IV mL Rate Questions)
 


Reference
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html
[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html
[6] HTML Tables, by Tutorialspoint, http://www.tutorialspoint.com/html/html_tables.htm

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Dosage Calculation - Amount in IV Fluid Questions

Source Website: http://www.dosagehelp.com/iv_amount.html
By Dosagehelp.com

Amount in IV Fluid Questions
Given a volume of IV fluid and a dosage expressed in percent, what is the mass of a particular dosage?

Formula:

$$\boxed{\frac{\mathbf{Concentration\; \%}}{\mathbf{100}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Dosage\; Amount\; in\; g)}}$$

Example: Calculate the amount of dextrose in 1000 mL D5W.

$$\frac{\mathbf{Concentration\; \%}}{\mathbf{100}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Dosage\; Amount\; in\; g)}$$

$$\frac{\mathbf{5\; \%}}{\mathbf{100}}x\mathbf{1000\; mL}=\boxed{\mathbf{50\; g}}$$

Example: Calculate the amount of sodium chloride in 2000 mL NS.
Recall NS is 0.9% NaCl (sodium chloride)

$$\frac{\mathbf{Concentration\; \%}}{\mathbf{100}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Dosage\; Amount\; in\; g)}$$

$$\frac{\mathbf{0.9\; \%}}{\mathbf{100}}x\mathbf{2000\; mL}=\boxed{\mathbf{18\; g}}$$

Continue (to Fluid Maintenance Requirement Questions)



Reference
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html
[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html 

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Dosage Calculation - Mass/Time - IV mL Rate Questions

Source Website: http://www.dosagehelp.com/iv_rate_ml_adv.html 
By Dosagehelp.com

Mass/Time - IV mL Rate Questions

Give an order in quantity of mass per time, determine the necessary IV flow rate in mL/hr based on the given mass per volume. These types of problems are often used in critical care nursing.

Formula:

$$\boxed{\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}}$$

Example: Give patient 500 mg of dopamine in 250 mL of D5W to infuse at 20 mg/hr. Calculate the flow rate in mL/hr.

$$\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

$$\frac{\mathbf{20\; mg/hr}}{\mathbf{500\; mg}}x\mathbf{250\; mL}=\boxed{\mathbf{10\; mL/hr}}$$

Alternatively 500 mg = 250 mL
Therefore, 20 mg/hr = 250 mL/500 mg x 20 mg/hr = 10 mL/hr

Example: Aggrastat at 12.5 mg in 250 mL is prescribed to be infused at a rate of 6 mcg/kg/hr in a patient who weighs 100 kg. At what flow rate in mL/hr will you set the pump?

$$\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

The first step is to convert the order per time to the amount required for this particular patient. This is a Dosage By Weight Question. 6 mcg/kg/hr is a dosage in terms of kg.

$$\mathbf{Weight\; in\; Kg}x\mathbf{Dosage\; Per\; Kg}=\mathbf{Y(Required\; Dosage)}$$

$$\mathbf{100\; Kg}x\mathbf{6\; mcg/kg/hr}=\mathbf{600\; mcg/hr}$$

Convert 600 mcg/hr to mg/hr.
    mcg → mg → g → kg    ( ÷ by 1,000 )
    600 ÷ 1,000 = 0.6 mg/hr

$$\frac{\mathbf{0.6\; mg/hr}}{\mathbf{12.5\; mg}}x\mathbf{250\; mL}=\boxed{\mathbf{12\; mL/hr}}$$

Alternatively 12.5 mg = 250 mL
Therefore, 0.6 mg/hr = 250 mL/12.5 mg x 0.6 mg/hr = 12 mL/hr

Question (22): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V Dopamine 5 mcg/kg/min. Dilution - 200 mg/100 mL Normal Saline. Patient Weight: 50 kg.
Calculate: __________ mL/hr = 5 mcg/kg/min.

$$\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

The first step is to convert the order per time to the amount required for this particular patient. This is a Dosage By Weight Question. 50 kg is the weight in kg and 5 mcg/kg/min is a dosage in terms of kg.

1 min Dosage = 5 mcg/kg
1 hour Dosage = 5 mcg/kg x 60 = 300 mcg/kg
5 mcg/kg/min = 300 mcg/kg/hr

$$\mathbf{Weight\; in\; Kg}x\mathbf{Dosage\; Per\; Kg}=\mathbf{Y(Required\; Dosage)}$$

$$\mathbf{50\; Kg}x\mathbf{300\; mcg/kg/hr}=\mathbf{15,000\; mcg/hr}$$

Convert 15,000 mcg/hr to mg/hr.
    mcg → mg → g → kg    ( ÷ by 1,000 )
    15,000 ÷ 1,000 = 15 mg/hr

$$\frac{\mathbf{15\; mg/hr}}{\mathbf{200\; mg}}x\mathbf{100\; mL}=\boxed{\mathbf{7.5\; mL/hr}}$$

Alternatively 200 mg = 100 mL
Therefore, 15 mg/hr = 100 mL/200 mg x 15 mg/hr = 7.5 mL/hr

Question (23): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V Dopamine 1 mcg/kg/min. Patient Weight: 50 kg.
Calculate: Amount of Dopamine in 100 mL diluent to deliver 1 mL/hr = 1 mcg/kg/min

The first step is to convert the order per time to the amount required for this particular patient. This is a Dosage By Weight Question. 50 kg is the weight in kg and 1 mcg/kg/min is a dosage in terms of kg.

1 min Dosage = 1 mcg/kg
1 hour Dosage = 1 mcg/kg x 60 = 60 mcg/kg
1 mcg/kg/min = 60 mcg/kg/hr

$$\mathbf{Weight\; in\; Kg}x\mathbf{Dosage\; Per\; Kg}=\mathbf{Y(Required\; Dosage)}$$

$$\mathbf{50\; Kg}x\mathbf{60\; mcg/kg/hr}=\mathbf{3,000\; mcg/hr}$$

Convert 3,000 mcg/hr to mg/hr.
mcg → mg → g → kg ( ÷ by 1,000 )
3,000 ÷ 1,000 = 3 mg/hr

$$\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

$$\frac{\mathbf{3\; mg/hr}}{\mathbf{Amt.\; of\; Dopamine}}x\mathbf{100\; mL}=\mathbf{1\; mL/hr}$$

$$\mathbf{Amt.\; of\; Dopamine}=\frac{\mathbf{3\; mg/hr}x\mathbf{100\; mL}}{\mathbf{1\; mL/hr}}=\boxed{\mathbf{300\; mg}}$$

Alternatively,
To deliver, 1 mL = 3 mg of Dopamine
Therefore, 100 mL diluent = 3/1 x 100 = 300 mg of Dopamine

Question (24): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
Patient Weight: 50 kg.
Calculate amount diluent for 200 mg Dopamine to deliver 1 mL/hr = 1 mcg/kg/min (Dosage).

The first step is to convert the order per time to the amount required for this particular patient. This is a Dosage By Weight Question. 50 kg is the weight in kg and 1 mcg/kg/min is a dosage in terms of kg.

1 min Dosage = 1 mcg/kg
1 hour Dosage = 1 mcg/kg x 60 = 60 mcg/kg
1 mcg/kg/min = 60 mcg/kg/hr

$$\mathbf{Weight\; in\; Kg}x\mathbf{Dosage\; Per\; Kg}=\mathbf{Y(Required\; Dosage)}$$

$$\mathbf{50\; Kg}x\mathbf{60\; mcg/kg/hr}=\mathbf{3,000\; mcg/hr}$$

Convert 3,000 mcg/hr to mg/hr.
mcg → mg → g → kg ( ÷ by 1,000 )
3,000 ÷ 1,000 = 3 mg/hr

$$\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

$$\frac{\mathbf{3\; mg/hr}}{\mathbf{200\; mg}}x\mathbf{Volume\; of\; diluent\; (mL)}=\mathbf{1\; mL/hr}$$

$$\mathbf{Volume\; of\; diluent\; (mL)}=\mathbf{1\; mL/hr}x\frac{\mathbf{200\; mg}}{\mathbf{3\; mg/hr}}=\boxed{\mathbf{66.7\; mL}}$$

Alternatively,
To deliver, 3 mg of Dopamine = 1 mL
Therefore, 200 mg of Dopamine = 1/3 x 200 = 66.7 mL of diluent

Question (25): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V adrenaline 0.02 mcg/kg/min. Dilution - 1.5 mg/50 mL. Patient Weight: 50 kg.
Calculate: __________ mL/hr = 0.02 mcg/kg/min.

$$\frac{\mathbf{Ordered\; Per\; Hour}}{\mathbf{Have}}x\mathbf{Volume\; (mL)}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

The first step is to convert the order per time to the amount required for this particular patient. This is a Dosage By Weight Question. 50 kg is the weight in kg and 0.02 mcg/kg/min is a dosage in terms of kg.

1 min Dosage = 0.02 mcg/kg
1 hour Dosage = 0.02 mcg/kg x 60 = 1.2 mcg/kg
0.02 mcg/kg/min = 1.2 mcg/kg/hr

$$\mathbf{Weight\; in\; Kg}x\mathbf{Dosage\; Per\; Kg}=\mathbf{Y(Required\; Dosage)}$$

$$\mathbf{50\; Kg}x\mathbf{1.2\; mcg/kg/hr}=\mathbf{60\; mcg/hr}$$

Convert 60 mcg/hr to mg/hr.
    mcg → mg → g → kg    ( ÷ by 1,000 )
    60 ÷ 1,000 = 0.06 mg/hr

$$\frac{\mathbf{0.06\; mg/hr}}{\mathbf{1.5\; mg}}x\mathbf{50\; mL}=\boxed{\mathbf{2\; mL/hr}}$$

Alternatively 1.5 mg = 50 mL
Therefore, 0.06 mg/hr = 50 mL/1.5 mg x 0.06 mg/hr = 2 mL/hr

Congratulations: You have completed the Dosage Calculation Worksheet From Ngee Ann Polytechnics.

Continue (to Mass/Liquid For Liquid Questions)
 
Continue (to Dosage Question Steps)



Reference
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html
[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html

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Dosage Calculation - Volume/Time - IV mL Rate Questions

Source Website: http://www.dosagehelp.com/iv_rate_ml.html
By DosageHelp.com

Volume/Time - IV mL Rate Questions

Given a certain amount of liquid and a time period, what is the necessary IV flow rate in mL/hr? Measurement used when IV regulated electronically by infusion pump.

Formula:

$$\boxed{\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (hr)}}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}}$$

Example: Infuse 250 mL over the next 120 minutes by infusion pump.

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (hr)}}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

Convert 120 minutes to hours.
    min → hr    ( ÷ by 60 )
    120 min ÷ 60 = 2 hr

$$\frac{\mathbf{250\; mL}}{\mathbf{2\; hr}}=\boxed{\mathbf{125\; mL/hr}}$$

Example: Ordered 1000 mL D5W IV to infuse in 10 hours by infusion pump.

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (hr)}}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

$$\frac{\mathbf{1000\; mL}}{\mathbf{10\; hr}}=\boxed{\mathbf{100\; mL/hr}}$$

Question (17): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V Hartmann's Solution 500 mL over 4 hours via infusion pump.

$$\mathbf{\text{Rate:}}\underline{}\mathbf{\text{mL/hr}}$$

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (hr)}}=\mathbf{Y(Flow\; Rate\; in\; mL/hr)}$$

$$\frac{\mathbf{500\; mL}}{\mathbf{4\; hr}}=\boxed{\mathbf{125\; mL/hr}}$$

Question (21): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V Hartmann's as per Parkland formula 4 mL/kg/%burns
Body Weight: 60 kg; %Burns: 30%
Volume to be infused over 24 hours: _______ mL; over first 8 hours: _______ mL

The Parkland formula is a burn formula used to estimate the amount of replacement fluid required for the first 24 hours in a burn patient so as to ensure they remain hemodynamically stable. The first half of this amount is delivered within 8 hours from the burn incident, and the remaining fluid is delivered in the next 16 hours.

 

The first step is to estimate the amount of replacement fluid required for the first 24 hours for this particular patient.
This is a Dosage By Weight Question. 60 kg is the weight in kg, 4 mL/kg/%Burns and  30 %Burns is a dosage in terms of mL.

$$\mathbf{Weight\; in\; Kg}x\mathbf{Dosage\; Per\; Kg}x\mathbf{\%Burns}=\mathbf{Y(Required\; Dosage)}$$

$$\mathbf{60\; kg}x\mathbf{4\; mL/Kg/\%Burns}x\mathbf{30\; \%Burns}=\boxed{\mathbf{7200\; mL\; over\; 24\; hours}}$$

The first half of this amount is delivered within 8 hours from the burn incident.

$$=\frac{\mathbf{7200\; mL}}{\mathbf{2}}=\boxed{\mathbf{3600\; mL\; over\; first\; 8\; hours}}$$

Continue (to Amount in IV Fluid Questions)



Reference 
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html
[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html

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Dosage Calculation - Volume/Time - IV Drop Rate Questions

Source Website: http://www.dosagehelp.com/iv_rate_drop.html
By DosageHelp.com

Volume/Time - IV Drop Rate Questions

Given a certain amount of liquid, a time period, and a drop factor (gtts/mL), what is the necessary IV flow rate in gtts/min? Measurement used when IV is regulated manually. Because it is not possible to give a patient a fraction of a drop, it is typical to round answers for these problems up or down to the nearest whole number. 

Formula:

$$\boxed{\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}}$$

Example: Calculate the IV flow rate for 1200 mL of NS to be infused in 6 hours. The infusion set is calibrated for a drop factor of 15 gtts/mL.

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}$$

Convert 6 hours to minutes.
    min ← hr    ( x by 60 )
    6 hr x 60 = 360 min

$$\frac{\mathbf{1200\; mL}}{\mathbf{360\; min}}x\mathbf{15\; gtts/mL}=\boxed{\mathbf{50\; gtts/min}}$$

Example: Calculate the IV flow rate for 200 mL of 0.9% NaCl IV over 120 minutes. Infusion set has drop factor of 20 gtts/mL.

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}$$

$$\frac{\mathbf{200\; mL}}{\mathbf{120\; min}}x\mathbf{20\; gtts/mL}=\boxed{\mathbf{33\; gtts/min}}$$

Question (16): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V Normal Saline 1000 mL over 24 hours. Drop Factor = 60 gtts/mL.

$$\mathbf{\text{Rate:}}\underline{}\mathbf{\text{gtts/min}}$$

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}$$

Convert 24 hours to minutes.
    min ← hr    ( x by 60 )
    24 hr x 60 = 1440 min

$$\frac{\mathbf{1000\; mL}}{\mathbf{1440\; min}}x\mathbf{60\; gtts/mL}=\boxed{\mathbf{41.7\; gtts/min}}$$

Answer rounded to the nearest whole number = 42 gtts/min

Question (18): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
I/V D5% 1000 mL over 8 hours. Drop Factor = 20 gtts/mL.

$$\mathbf{\text{Rate:}}\underline{}\mathbf{\text{gtts/min}}$$

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}$$

Convert 8 hours to minutes.
    min ← hr    ( x by 60 )
    8 hr x 60 = 480 min

$$\frac{\mathbf{1000\; mL}}{\mathbf{480\; min}}x\mathbf{20\; gtts/mL}=\boxed{\mathbf{41.7\; gtts/min}}$$

Answer rounded to the nearest whole number = 42 gtts/min

Question (19): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V gentamycin 80 mg/100 mL N/Saline over 1 hour. Drop Factor = 60 gtts/mL.

$$\mathbf{\text{Calculate Rate:}}\underline{}\mathbf{\text{gtts/min}}$$

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}$$

Convert 1 hours to minutes.
    min ← hr    ( x by 60 )
    1 hr x 60 = 60 min

$$\frac{\mathbf{100\; mL}}{\mathbf{60\; min}}x\mathbf{60\; gtts/mL}=\boxed{\mathbf{100\; gtts/min}}$$

Question (20): (From Ngee Ann Polytechnics Dosage Calculation Worksheet)
ORDER: I/V Osmofundin 20% 100 mL over 30 Minutes. Drop Factor 60 gtts/mL.

$$\mathbf{\text{Rate:}}\underline{}\mathbf{\text{gtts/min}}$$

$$\frac{\mathbf{Volume\; (mL)}}{\mathbf{Time\; (min)}}x\mathbf{Drop\; Factor\; (gtts/mL)}=\mathbf{Y(Flow\; Rate\; in\; gtts/min)}$$

$$\frac{\mathbf{100\; mL}}{\mathbf{30\; min}}x\mathbf{60\; gtts/mL}=\boxed{\mathbf{200\; gtts/min}}$$

Continue (Go to Volume/Time - IV mL Rate Questions)



Reference 
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html
[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html 

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Dosage Calculation - IV Terms & Abbreviations

Source Website: http://www.dosagehelp.com/iv_terms.html
By DosageHelp.com

The following is an overview of key IV (intravenous) concepts which are useful for dosage calculation problems.

Important IV Terms

• gtts: drops
• Drop Factor: Number of drops per volume of IV fluid. Varies depending on the tubing used. Usually measured in gtts/mL.
• Flow Rate: Measure of the flow of liquid from an IV. Usually measured in gtts/minute (how many drops are released every minute) or in mL/hour (how many mL flow through each hour). gtts/minute is used for manually regulating an IV while mL/hour is used when utilizing an electronic IV regulator.

Important IV Abbreviations

• D: Dextrose
• W: Water
• S: Saline
• NS: Normal Saline (0.9% NaCl)
• RL or LR: Lactated Ringer's Solution

Example: D5W = 5% Dextrose in Water
Example: D5 � NS = 5% dextrose in 0.225% saline solution

Continue (Go to Volume/Time - IV Drop Rate Questions)

Reference  
[1] Advanced Formatting, Ry’s MathML Tutorial, http://rypress.com/tutorials/mathml/advanced-formatting.
[2] MathML, Presentation MathML, https://en.wikipedia.org/wiki/MathML.
[3] MathJax in Blogger (II), Posted on Tuesday, 12 July 2011, http://irrep.blogspot.sg/2011/07/mathjax-in-blogger-ii.html
[4] MathJax, http://docs.mathjax.org/en/latest/start.html

[5] MathML Fundamentals (Colours), W3C recommendation, http://www.w3.org/TR/MathML/chapter2.html

• http://www.dosagehelp.com/iv_terms.html