Exam 23: Heparin Calculations

Correct Answer:

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a. No weight conversion required
b. Calculate heparin bolus dosage.
80 units/kg * 81 kg = 6,480 units
100 units:1 mL = 6,480 units:x mL $\frac { 100 } { 100 } x = \frac { 6,480 } { 100 }$ x = 64.8 mL
c. Calculate infusion rate
18 units/kg/hr * 81 kg = 1,458 units/hr
100 units:1 mL = 1,458 units:x mL $\frac { 100 } { 100 } x = \frac { 1,458 } { 100 }$ x = 14.6 mL/hr (Rate not rounded to a whole number, pump delivers in tenths of a mL/hr)
d. Client's APTT is 43. According to the protocol, rebolus with 40 units/kg and increase rate by 2 units/kg/hr.
40 units/kg * 81 kg = 3,240 units
100 units:1 mL = 3,240 units:x mL $\frac { 100 } { 100 } x = \frac { 3,240 } { 100 }$ x = 32.4 mL
e. Determine the infusion rate increase.
2 units/kg/hr * 81 kg = 162 units/hr increase
Calculate adjustment rate.
100 units:1 mL = 162 units:x mL $\frac { 100 } { 100 } x = \frac { 162 } { 100 }$ x = 1.6 mL/hr increase $\begin{array} { l } 14.6 \mathrm {~mL} / \mathrm { hr } \text { (initial rate) } \\+ 1.6 \mathrm {~mL} / \mathrm { hr } \text { (increase) } \\16.2 \mathrm {~mL} / \mathrm { hr }\end{array}$ 16.2 mL/hr
New rate 16.2 mL/hr (rate not rounded to whole number, pump capable of delivering in tenths of a mL/hr).