When should you total the amounts recorded on the intake and output (i&o) record?

Nursing aides assist with documenting clients’ intake and output. refers to the amount of fluids the client ingests, and refers to the amount of fluids that leave the body. Total intake should be nearly equal to total output every day, but some fluids, referred to as “,” cannot be measured, such as fluids lost through the respiratory system, sweat, and stool.  Therefore, urine is the most commonly measured output. Other fluids, like wound drainage in a drainage device, are also measured.

Fluids are typically documented as milliliters (mL). See the Chapter 5.7, “Documentation of Food and Fluids” subsection for review of converting ounces to mL and additional information on measuring intake and output.

Fluid intake is routinely documented with meal intake. Some clients with certain health conditions also have their output measured and documented every shift. Intake and output are then calculated over a 24-hour period and monitored by the nurse. A client’s may be closely monitored by the nurse due to illness, a new medication, or a circulatory or urinary condition. See Figure 7.15[1] for an example of a 24-hour intake and output documentation record.

When should you total the amounts recorded on the intake and output (i&o) record?
Figure 7.15 Sample Intake & Output Documentation Record

Recommended textbook solutions

When should you total the amounts recorded on the intake and output (i&o) record?

The Human Body in Health and Disease

7th EditionGary A. Thibodeau, Kevin T. Patton

1,505 solutions

When should you total the amounts recorded on the intake and output (i&o) record?

Pharmacology and the Nursing Process

7th EditionJulie S Snyder, Linda Lilley, Shelly Collins

388 solutions

When should you total the amounts recorded on the intake and output (i&o) record?

Clinical Reasoning Cases in Nursing

7th EditionJulie S Snyder, Mariann M Harding

2,512 solutions

When should you total the amounts recorded on the intake and output (i&o) record?

Essentials of Modern Neuroscience

1st EditionDavid Standaert, Erik Roberson, Franklin Amthor, W. Anne Burton Theibert

182 solutions

Intake and output calculation NCLEX review for nurses. This quick review will highlight how to calculate intake and output because these type of questions may be on your NCLEX exam or (definitely) on a nursing lecture exam.

It seems like calculating I and O’s is self-explanatory, right?! Well, it can be tricky, especially calculating intake because many students get confused on what to include, how to convert from ounces to milliliters, and how to interpret the calculation.

Don’t forget to take the intake and output practice calculation quiz after reviewing the material below.

So let’s break it down!

Lecture on I and O’s

What is intake? These are fluids taken IN the body. It can be via various routes like the mouth, a tube, or intravenous (IV).

What do you include for the liquids that are consumed? This includes anything that is liquid at room temperature like:

  • Juice
  • Water
  • Ice chips (NOTE: this melts to half its volume….if you give the patient 8 oz of ice chips RECORD 4 oz)
  • Drinks (coffee, soft drinks, tea etc.)
  • Milk
  • Gelatin (Jell-O ®)
  • Broths
  • Ice cream
  • Frozen treats: popsicles, sorbet
  • Nutrition supplements like Ensure® or Boost ®
    • How about pudding or items similar to it? NO…most NCLEX review guides (example: Kaplan) specify NOT to include pudding etc. in the calculation since it is a semi-liquid (Irwin, Yock & Burckhardt, 2015). However, some sources say to include it (Carter, 2007), but with that being said, ask your professor what they want you to do. However, for this review we will NOT include pudding or products similar to it.

Many times test questions will give you the amount in ounces (oz), but we record intake and output in milliliters (mL). To convert oz to mL, simply multiply the amount of oz by 30.

Example: 67 oz = 2010 mL

Miscellaneous:

  • Tube feedings (include free water)
  • IV and central line fluids (TPN, lipids, blood products, medication infusion)
  • IV and central line flushes
  • Irrigants (example: irrigating a catheter….calculate the amount of irrigate delivered and subtract it from the total urine output…which will equal the urine output)

Output

What is output? These are fluids that LEAVE the body. It can be via various routes as well.

What’s included:

  • Urine output (most of the output calculation)
  • Emesis
  • Liquid stool (ostomy or diarrhea)
  • Wound draining (drains, tubes…example: chest tubes etc.)
  • Suction (gastric, respiratory)

Not included but needs to be considered is: insensible loss

This is from the skin and respiratory system. It can’t be measured. According the Mosby’s Medical Dictionary, insensible loss is estimated to be 600 mL/day (“insensible water loss”, 2018).  This varies depending on the patient’s activity level, temperature etc. Therefore, you want to take that in account when assessing if the patient is at risk for fluid volume deficient OR fluid volume overload.

Interpreting Intake and Output

  • If the intake is less than output or if the output is MORE than the intake….think DEHYRDATION! The patient is losing too much fluids compared to what they are taking in.
  • If the intake is more than output or if the output is LESS than the intake….think that the patient may be retaining fluid and is in FLUID OVERLOAD!

Example: Intake 4250 mL and Output 1210 mL…..patient is at risk for fluid volume overload.

Intake and Output Quiz

References:

  • Carter, P. (2007). Lippincott’s Textbook for Nursing Assistants (2nd ed., p. 403). Lippincott Williams & Wilkins.
  • insensible water loss. (2018) Mosby’s Medical Dictionary, 8th edition. (2009). Retrieved February 8 2018 from https://medical-dictionary.thefreedictionary.com/insensible+water+loss
  • Irwin, B., Yock, P., & Burckhardt, J. (2015). NCLEX-PN 2015-2016 Strategies, Practice, and Review with Practice Test (p. 127). Simon and Schuster.

When should you total the amounts recorded on the intake and output record?

Nurses should check with the plan of care to find out if their clients' intake and output should be monitored. So, every time one of these clients receives or loses fluids in any way, the exact volume can be recorded. These volumes are then totaled at the end of every shift and then at the end of a 24-hour period.

Why is it important to record intake and output?

Accurate measurement and documentation of I&Os are important because medications, intravenous and fluid administration, dietary decisions and tube feeding physician orders are based on I&O 24-hour totals. The numbers provide real-time data that guides daily care of the patient.

What measurement is used for intake and output?

Measuring Intake and Output: The unit used to measure I&O is the milliliter (mL). To measure fluid intake, nurses must convert household measures such as a glass, cup, or soup bowl to metric units. In household measures, 30 mL is equivalent to 1 ounce, 500 mL is about 1 pint, and 1000 mL is about 1 quart.