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2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats

Veterinary practice guidelines such as the recently published 2013. AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats



IV Fluid Therapy Calculations.pdf

The basics: • Maintenance fluid rate for an adult dog or cat is estimated as 2mL/kg/hr OR. 50mL/kg/24 hours. • e.g. 35kg dog: Maintenance = 35kg x 2 = 70mL/ 



2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats*

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2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats – Tip

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2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats

Fluid therapy is important for many medical conditions in veterinary patients. Available at: www.cdc.gov/hicpac/pdf/guidelines/bsi-guidelines-2011.pdf.



IV Fluid Therapy Calculations.pdf

Useful Information. IV Fluid Therapy Calculations. The basics: • Maintenance fluid rate for an adult dog or cat is estimated as 2mL/kg/hr OR.



2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats*

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[PDF] 2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats

Assess for three types of fluid disturbances 1 Changes in volume (e g dehydration blood loss heart disease) a Fluid deficit calculation for dehydration: 



[PDF] IV Fluid Therapy Calculations

Useful Information IV Fluid Therapy Calculations The basics: • Maintenance fluid rate for an adult dog or cat is estimated as 2mL/kg/hr OR



[PDF] 2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats*

Items of particular importance in evaluating the need for fluids are described in Table 1 Next develop a treatment plan by first determining the appropriate



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Fluid Therapy Dehydration? __ dehydration x __wt in kg = ___L Example: 20 kg dog who is 8 dehydrated requires 1 6 L 20 kg patient is 10 dehydrated



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[PDF] Practical fluid therapy in companion animals – part 1 Vet Times

5 sept 2016 · Fluid therapy is a common and usually essential part of a treatment plan for most veterinary patients including management of medical 

  • What is fluid therapy in animals?

    IV fluid therapy is very common in veterinary practice and allows practitioners to restore intravascular volume, correct dehydration, and administer IV medications.
  • What is the formula for fluid therapy in animals?

    The volume of rehydration fluids required is determined by reassessing hydration parameters after resuscitation, using the following formula: % dehydration × body wt (kg) × total body water (0.6). This volume is commonly administered throughout 4–12 hours with standard isotonic, balanced electrolyte replacement fluids.
  • What are the different types of fluid in fluid therapy in animals?

    There are five broad categories of fluids used in veterinary practice: 1) crystalloids, 2) colloids, 3) blood products, 4) hemoglobin-based oxygen carrying solutions, and 5) parenteral nutrition.
  • Fluid therapy is indicated either when there is a loss of fluid to any part of these compartments or there is a risk of loss of fluid. The severity of the fluid loss, and the compartment from which it has been lost, influence the choice of fluid and the speed at which it needs to be administered.

IV Fluid Therapy Calculations

Year Group: BVSc3 +

Document number: CSL_A10

Equipment for this station:

Considerations for this station:

Equipment list:

Please inform a member of staff if equipment is damaged or about to run out.

IV Fluid Therapy Calculations

Calculator

Pen Paper Every patient should be assessed as an individual and the plan for fluid therapy adjusted accordingly.

Useful Information

IV Fluid Therapy Calculations

The basics:

Maintenance fluid rate for an adult dog or cat is estimated as 2mL/kg/hr OR

50mL/kg/24 hours

e.g. 35kg dog: Maintenance = 35kg x 2 = 70mL/hour or 50mL x 35kg = 1750mL/24 hours Maintenance fluid rate for puppy or kitten may be estimated as 3-4mL/kg/hr

Fluid deficit:

If present, the fluid deficit needs to be calculated and this can be done by estimating the percentage dehydration: e.g. A 35kg dog that is estimated to be 8% dehydrated Percentage dehydration is estimated to be 8% of the body weight and then this is converted into fluid units: e.g. 35kg x 0.08 = 2.8kg

1kg = 1L, therefore the dog has a 2800mL fluid deficit

If the fluid lost is to be replaced over 24 hours, the maintenance requirement is added to the fluid deficit to work out the total amount to be given over a 24 hour period: e.g. 1750mL + 2800mL = 4550mL over 24 hours In a severely dehydrated animal the deficit may be replaced over 24 hours, though more of less may be appropriate depending on the case and response to treatment. If a patient is in shock, generally a bolus of fluids will be given over a short period of time rather than increasing the fluid rate so that the fluid deficit is replaced more quickly.

Ongoing losses:

Fluid rates must be adjusted according to the ongoing losses such as vomiting, diarrhoea, haemorrhage. The volume of fluid that is being lost should be estimated in each case and then adjusted depending on disease progression and clinical assessment.

Useful Information

IV Fluid Therapy Calculations

Once the overall fluid rate per hour has been calculated, taking into consideration maintenance, deficit and on-going loss, this information can be entered into an infusion pump if this is available. If not a drip rate needs to be calculated in mL/minute: e.g. A dog needs 116mL/hour

116mL/hour/60 = 1.93mL/minute

The amount needed per minute then has to be multiplied by the drops/mL that the giving set delivers. This can be found on the giving set. Use this to convert the amount needed in mL per minute to the number of drops per minute. e.g. A 20drops/mL giving set

1.93mL/min x 20 = 38 drops per minute

Set up the giving set to deliver 38 drops per minute To check, the drip rate can be measured over a shorter period of time e.g. 19 drops over 30 seconds, ~10 drops over 15 seconds Note: Fluid administration rates can be controlled more accurately using an infusion pump. Current practice for fluid administration during anaesthesia:

2-4mL/kg/hr (healthy animal, minimal fluid losses e.g. blood loss or

evaporation) Faster rates may be required for individual animals i.e. for different cases and situations Work through the following scenarios, the answers are on the next 2 pages.

1.Calculate the drip rate required for a 6 year old female DSH undergoing a

routine dental. She weighs 3.4kg and otherwise healthy. The giving set delivers 60 drops/mL.

2.A 15 week old, 6.8kg puppy has been admitted with vomiting and

diarrhoea that have been present for 2 days. The puppy is 6% dehydrated which needs to be corrected over 24 hours. What fluids will be used initially for the puppy and what drip rate would be used? The giving set delivers 20 drops/mL.

3.A dog is admitted following an road traffic accident (RTA) and is in

hypovolaemic shock. The dog weighs 35kg and you decide that it needs a bolus of fluids. You decide to give it a 30mL/kg bolus over 20 minutes. The giving set delivers 20 drops/mL.What would the drip rate be? What could be done to try to ensure the animal received this volume in the time required?

4.A 4.7kg, 9 year old MN DSH cat has been admitted with a severely

distended and painful bladder due to a urethral obstruction. You successfully catheterise the urethra but the cat is 10% dehydrated. He has a high (raised) potassium and is depressed. What would be the setting of an infusion pump to deliver a bolus of 25mL/kg over 30 minutes? What fluid type would be most appropriate in this case?

Questions

IV Fluid Therapy Calculations

Answers

1.Calculate the drip rate required for a 6 year old female DSH undergoing a

routine dental. She weighs 3.4kg and otherwise healthy. The giving set delivers 60 drops/mL.

3.4kg x 4mL/hour = 13.6 mL/hr

13.6mL/hour / 60 = 0.226mL/minute

0.226mL/minute x 60drops/mL = 13.5 drops/minute

= 0.225 drops/second = approx. 1 drop every 5 seconds

2.A 15 week old, 6.8kg puppy has been admitted with vomiting and diarrhoea

that have been present for 2 days. The puppy is 6% dehydrated which needs to be corrected over 24 hours. What fluids will be used initially for the puppy and what drip rate would be used? The giving set delivers 20 drops/mL. Maintenance = 3mL/kg/hr x 24 hrs = 72mL/kg/24hrs = 489.6mL

Deficit = 6.8kg x 0.06 (% dehydration) = 408mL

Total over 24 hours = 489.6mL + 408mL = 897.6mL

897.6mL /24 hrs = 37.4mL/hr

37.4mL /60min = 0.623mL/min

0.623mL/min x 20drops/mL = 12.5 drops/min

0r if you had used 4mL/kg/hr. Answer: 15 drops/min

= 0.25 drops/second = approx. 1 drop every 4 seconds If the puppy continues to vomit and have diarrhoea, these ongoing losses with need to be factored in to the fluid therapy plan. N.B. It is important to monitor the response to treatment and alter the fluid rate accordingly; the initial calculations are only the starting point.

IV Fluid Therapy Calculations

Answers

3.A dog is admitted following an road traffic accident (RTA) and is in

hypovolaemic shock. The dog weighs 35kg and you decide that it needs a bolus of fluids. You decide to give it a 10mL/kg bolus over 10 minutes. The giving set delivers 20 drops/mL.What would the drip rate be? What could be done to try to ensure the animal received this volume in the time required?

35Kg x 10mL/kg = 350mL over 10 minutes

350mL x 6 = 2100mL over 1 hour

2100 /60 = 535mL/minute

35mL/minute x 20 drops/mL = 700 drops/minute

= 11.6 drops every second It would be difficult to accurately set a giving set to this speed and most infusion pumps would not work at this speed ʹso if this is what is required the bag would need to be squeezed. Another options would be to place another i.v.catheter and run 2 bags of fluid in at once.

4.A 4.7kg, 9 year old MN DSH cat has been admitted with a severely distended

and painful bladder due to a urethral obstruction. You successfully catheterise the urethra but the cat is 10% dehydrated. He has a high (raised) potassium and is depressed. What would be the setting of an infusion pump to deliver a bolus of 25mL/kg over 30 minutes? What fluid type would be most appropriate in this case? Either 0.9% NaClor Hartmanswould be suitable in this case.

4.7kg x 25mL/kg = 117.5mL over 30 minutes

117.5mL x 2 = 235mL/hr

Enter 117.5mL under VTBI (volume to be infused) on the infusion pump N.B. Normally the value would be rounded up or down i.e. 117.5 set as 120mL

IV Fluid Therapy Calculations

In cases of lower urinary tract obstruction and hypoadrenocorticoid (Addisonian) crisis where there is hyperkalaemia, crystalloids that contain concentration of potassium in the fluids is still lower than the concentration in the blood, which will therefore be lowering the potassium concentration in the blood. These fluids are also more balanced and lead to a more rapid resolution of the acidosis that is present.

Drobatzet. al. (2008). The influence of crystalloid type on acid-base and electrolyte status of cats with

urethral obstruction. Journal of Emergency and Veterinary Clinical Care. 18, 4, 355-361. When administering fluids to an animal of small body size e.g. a cat or small dog, it may be advisable to empty (remove) some of the fluid from the bag to prevent the inadvertent administration of an excessive volume of fluid. Do not replace an empty bag without considering the current fluid status and requirements and the risk of fluid overdose to the animal.

Common infusion pump abbreviations:

VTBI = volume to be infused

If administering a bolus enter the total amount. Once the infusion pump has infused this set amount it will stop and the animal will no longer receive fluids (and most pumps then beep loudly).

RATE = rate e.g. 2mL/kg/hr

VI = volume infused. This is the total amount of fluid the patient has received (as long as this was reset when the patient was first put on the drip).

IV Fluid Therapy Calculations

Additional Information

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