
Resting Energy Requirement calculation
 70 x (kg)^{3/4} = k9
 40 x kg = fel

Rehydration volume calculation
% dehydrated x BW kg x total body water (0.6) = rehydration fluids required

Kmax calculation
0.5 meq/kg/hr

Effective osmolality calculation
2(Na) + (glulcose/18)

Osmolality calculation
[2 (Na + K)] + [glucose / 18] + [Bun / 2.8]

MAP calculation
diastolic + [(systolic  diastolic) / 3]

Aa gradient calculation
(P_{A}O_{2}  P_{a}O_{2})
P_{A}O_{2} = (F_{i}O_{2} x (barometric pressure  water vapor))  PaCO2/RQ

Aa gradient water vapor and barometric pressure values
 Water vapor = 47 mmHg
 Barometric pressure = 760 mmHg sea level
 615 mmHg Denver

What is the RQ in Aa gradient?
 RQ = respiratory quotient
 CO2 production / O2 consumption
 ~0.9 (0.7  1.0)

Corrected Cl calculation
 Cl x normal Na/Measure Na
 Norm Na dog = 107113 meq/L
 fel = 117  123 meq/L

Total body water calculation
534660 ml/kg "normal" weight

Corrected Na calculation
Na measured + 1.6 ([measured glucose  normal glucose] / 100)

Tidal volume
 VTS SG = 815 ml/kg
 work = 15 ml/kg

Coronary perfusion pressure calculation
Aortic diastolic pressure  Right atrial diastolic pressure

Cerebral perfusion pressure calculation
MAP  intracranial pressure

Free water deficit calculation
0.6 x BW kg (1  140 / serum Na)

What drugs is a fluid bag delivery of a CRI more appropriate for and why? (3)
 1. Lidocaine
 2. ketamine
 3. dexmedetomidine
 not necessarily as variable as opioids in their dosing, can likely remain at same level for longer period of time

How much are fluid bags overfilled and can this change/why?
Overfilled by ~10% by manufacturer, then lose volume due to evaporative losses over time

What is the 10% rule?
If a drug added to a fluid bag is 10% or more of the volume in the bag, then that volume should be removed from the bag prior to addition of the drug

How do you add a drug to a burette and what is something to remember when adding more than 1 ml?
 After adding medication to injection port, instill ~1 ml of sterile fluid to flush the port to ensure entire medication dose is delivered.
 When adding volumes > 1 ml, withdraw same amount of air from the burette to minimize pressure changes that affect the filling of the burette by gravity. Swirl burette to mix, do not invert as it damages air inlet at the top of the burette.

Squeezing a burette?
Avoid. Squeezing causes pressure changes within the chamber and impedes flow by gravity into the chamber.

How much dead space is typically found in the needle, hub of the needle, and hub of the syringe?
0.1  0.2 ml

Chemical incompatibilities are:
those that result in a loss of potency of greater than 10% over a period of time in which they were tested

