The medical-surgical nurse is caring for a 55-year-old female patient after surgery. The patient's respiratory rate has increased from 12 to 22 breaths/min, and the pulse rate has increased from 86 to 110 beats/min since the patient was last assessed 4 hours ago. What action by the nurse is best?

1. Doseinmcg/min=2mcg/kg/min×60kg=120mcg/min

   Convert this to mg/min since the concentration is in mg:

   120mcg/min=0.12mg/min120 \text{ mcg/min} = 0.12 \text{ mg/min}120mcg/min=0.12mg/min

2. Determine the concentration of Dopamine:

   • Total amount of Dopamine: 200 mg in 250 mL of saline
   • Concentration:

   Concentration=200mg250mL=0.8mg/mL\text{Concentration} = \frac{200 \text{ mg}}{250 \text{ mL}} = 0.8 \text{ mg/mL}Concentration=250mL200mg​=0.8mg/mL

3. Calculate the pump rate in mL/min:

   To find the rate in mL/min needed to deliver 0.12 mg/min:

   Pumprate=Desireddose(mg/min)Concentration(mg/mL)\text{Pump rate} = \frac{\text{Desired dose (mg/min)}}{\text{Concentration (mg/mL)}}Pumprate=Concentration(mg/mL)Desireddose(mg/min)​

   Pumprate=0.12mg/min0.8mg/mL=0.15mL/min\text{Pump rate} = \frac{0.12 \text{ mg/min}}{0.8 \text{ mg/mL}} = 0.15 \text{ mL/min}Pumprate=0.8mg/mL0.12mg/min​=0.15mL/min

4. Convert the pump rate to mL/hour:

   Multiply by 60 to convert from mL/min to mL/hour:

   Pumprate=0.15mL/min×60min/hour=9mL/hour\text{Pump rate} = 0.15 \text{ mL/min} \times 60 \text{ min/hour} = 9 \text{ mL/hour}Pumprate=0.15mL/min×60min/hour=9mL/hour

So, you should set the pump to deliver Dopamine at a rate of 9 mL/hour.

The increased respiratory rate and pulse rate can be indicators of physiological changes or potential complications in the patient's condition. These changes may suggest alterations in tissue perfusion or other underlying issues that require further assessment.
Assessing the patient's tissue perfusion includes evaluating additional vital signs, such as blood pressure, oxygen saturation, and capillary refill time. Assessing skin color, temperature, and moisture, as well as peripheral pulses, can also provide important information regarding tissue perfusion.
B. Pain medication (option B) is incorrect because the increased respiratory and pulse rates could also indicate other factors that require assessment before administering pain medication.
C. Documenting the findings in the patient's chart (option C) is incorrect because it should not be the primary action at this point. Assessing the patient's condition and determining appropriate interventions take priority.
D. Increasing the rate of the patient's IV infusion (option D) is incorrect because may not be the most appropriate action without further assessment. The patient's increased respiratory and pulse rates may not necessarily be related to hydration status, and it is important to assess the patient comprehensively before making changes to the IV infusion rate.
Therefore, the best action by the nurse in this situation is to further assess the patient's tissue perfusion to gather more information and determine the appropriate course of action.