The Nursing Math Thread  page 14
A member pm'd me the following question highlighted below. We created this thread for you guys to talk about math, solve math problems, and post math websites that you have found helpful. I was... Read More


Feb 26, '09Here are some IV questions for you?
a paediatric patient, 8 years old, weighs 25 kg and height 120 cm
Pt is fasting for a laporoscopy and is scheduled for it at 1100 hrs.
Day 01
Orders: Ampicillin 500 mg IV, give 1hr preop
Gentamicin 80 mg IV, give 1 hr preop
Indomethacin 25 mg supp given 2 hrs preop
Morphine 5 mg IV stat
Naloxone 0.5 m IV for Resp <8 per mins and Sedation =3; repeat q23 min 'til awake
she finally goes in for surgery at 1100 hrs, you give her her IV antibiotics, and she returned from ruptured appendix sugery, and the following meds are ordered:
Ampicillin 60 mg IV q 8h
Gentamicin 60 mg IV q 8 hr
Gen levels 3 rd dose
Meperidine 2550 mg IM/SC q6h or Morphine 24 mg IM/SC q34 hr
Dimenhydrainate 25 mg PO/IM/supp q 4 hr prn
Indomethacin 25 mg supp BID (0600 hrs and 1800 hrs)
Nalozone 0.5 mg IV fo Respd <8pe mind and Sedation=3; repeat q23 min til awake.
Are these medication dosage safe?
And what are some nursing actions in order to safely administer meds?
: ) 
Feb 26, '09Quote from wondergirlhereNot all of these are safe dosages. Look in a nursing drug reference for information on safe administration. This is a thread about math calculation.Here are some IV questions for you?
a paediatric patient, 8 years old, weighs 25 kg and height 120 cm
Pt is fasting for a laporoscopy and is scheduled for it at 1100 hrs.
Day 01
Orders: Ampicillin 500 mg IV, give 1hr preop
Gentamicin 80 mg IV, give 1 hr preop
Indomethacin 25 mg supp given 2 hrs preop
Morphine 5 mg IV stat
Naloxone 0.5 m IV for Resp <8 per mins and Sedation =3; repeat q23 min 'til awake
she finally goes in for surgery at 1100 hrs, you give her her IV antibiotics, and she returned from ruptured appendix sugery, and the following meds are ordered:
Ampicillin 60 mg IV q 8h
Gentamicin 60 mg IV q 8 hr
Gen levels 3 rd dose
Meperidine 2550 mg IM/SC q6h or Morphine 24 mg IM/SC q34 hr
Dimenhydrainate 25 mg PO/IM/supp q 4 hr prn
Indomethacin 25 mg supp BID (0600 hrs and 1800 hrs)
Nalozone 0.5 mg IV fo Respd <8pe mind and Sedation=3; repeat q23 min til awake.
Are these medication dosage safe?
And what are some nursing actions in order to safely administer meds?
: ) 
Mar 10, '09I have found the book, Calculate with Confidence, by Deborah Gray Morris. It is great, comes with a CD, so you can practice the calculations over and over.


May 18, '09here's some practice problems you can print also some links to others, i haven't checked out the links yet:
http://www.msumedcalc.com/links.html 
May 24, '09Any takers? I'm preparing for the TEAS & this one came off of the testprepreview.com site. I can't figure how the correct answer is "A." I'm sorry in advance if this is the wrong thread. I cross posted in another sticky. This thread is very helpful. Thanks, everyone.
10. What is the cost in dollars to steam clean a room W yards wide and L yards long it the steam cleaners charge 10 cents per square foot? A. 0.9WL
B. 0.3WL
C. 0.1WL
D. 9WL
E. 3WL 
May 24, '09Quote from kitti419You need to convert the cost to cents/square yard first. A yard is equal to 3 feet. A square yard is equal to 9 feet (length of 3 feet x width of 3 feet). If you draw a picture, you will easily see that there are 9 square feet in a square yard and at 10 cents a square yard that ends up as 90 cents for a square yard (10 cents for each square foot). Now you can work the problem. . .multiplying the width of the room (W) x the length of the room (L) x the cost to steam clean it in cents/square yard (90 cents) to get the answer.Any takers? I'm preparing for the TEAS & this one came off of the testprepreview.com site. I can't figure how the correct answer is "A." I'm sorry in advance if this is the wrong thread. I cross posted in another sticky. This thread is very helpful. Thanks, everyone.
10. What is the cost in dollars to steam clean a room W yards wide and L yards long it the steam cleaners charge 10 cents per square foot?
A. 0.9WL
B. 0.3WL
C. 0.1WL
D. 9WL
E. 3WL
W X L x 90 cents = 90WL which they turned into a decimal of 0.9WL (Money is usually given in decimals.) 
May 24, '09Ok. Got another one. I feel like I am onto something thinking John is painting at 1.5 times the rate of Sally, so she is doing 75% of the work or something...but the answer is 2 hours 24 mins, which I don't quite understand.
2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together? A. 2 hours and 24 minutes
B. 3 hours and 12 minutes
C. 3 hours and 44 minutes
D. 4 hours and 10 minutes
E. 4 hours and 33 minutes 
May 25, '09if sally can paint a house in 4 hours, and john can paint the same house in 6 hour, how long will it take for both of them to paint the house together?
a. 2 hours and 24 minutesthis is an algebra work problem. the formula for these are set up as follows: 1/4 (what sally can do) + 1/6 (what john can do) = 1/x (what they can do together). solve for x.
b. 3 hours and 12 minutes
c. 3 hours and 44 minutes
d. 4 hours and 10 minutes
e. 4 hours and 33 minutes
1/4 + 1/6 = 1/x
(24) 1/4 + (24) 1/6 = (24) 1/x
6 + 4 = 24/x
10x = 24
x = 24/10
x = 2.4
2.4 = 2 hours, and the .4 multiplied x 60 minutes = 24 minutes, so the answer is 2 hours and 24 minutes 
May 27, '09This problem is driving me crazy! I don't even know where to begin in terms of setting it up, etc...
Mr. Angus, age 79, is admitted to the hospital with an exacerbation of Congestive Heart Failure. His main IV order is 1500 ml NS with 20mEq KCl to run over 24 hours. He also has a urinary tract infection and is receiving IV antibiotics 100 ml every 6 hours as treatment. He is currently NPO and ordered a fluid restriction of 1500 ml in 24 hours. How much of his primary IV will Mr. Angus receive if the fluid restriction is enforced?
The correct answer is 1100mL.

May 27, '09Quote from shrimpchipsTotal fluid allowed in 24 hours = 1500 mLThis problem is driving me crazy! I don't even know where to begin in terms of setting it up, etc...
Mr. Angus, age 79, is admitted to the hospital with an exacerbation of Congestive Heart Failure. His main IV order is 1500 ml NS with 20mEq KCl to run over 24 hours. He also has a urinary tract infection and is receiving IV antibiotics 100 ml every 6 hours as treatment. He is currently NPO and ordered a fluid restriction of 1500 ml in 24 hours. How much of his primary IV will Mr. Angus receive if the fluid restriction is enforced?
The correct answer is 1100mL.
The IV antibiotics are given q6h, or 4 times, in that 24 hour period at 100 mL each time. Each antibiotic infusion contains 100 mL, so 4 x 100 mL each = 400 mL
If only 1500 mL of fluid is allowed in 24 hours and 400 mL of it will be used up giving the antibiotic, that leaves 1500 mL  400 mL or 1100 mL of the NS with 20 mEq of KCL that can be given in the remaining 24 hours. 
May 27, '09Quote from DaytoniteThat's exactly right. I couldn't have wrote it out better myself!Total fluid allowed in 24 hours = 1500 mL
The IV antibiotics are given q6h, or 4 times, in that 24 hour period at 100 mL each time. Each antibiotic infusion contains 100 mL, so 4 x 100 mL each = 400 mL
If only 1500 mL of fluid is allowed in 24 hours and 400 mL of it will be used up giving the antibiotic, that leaves 1500 mL  400 mL or 1100 mL of the NS with 20 mEq of KCL that can be given in the remaining 24 hours.