Which needle gauge should a nurse select when administering a medication subcutaneously?
8.
20.
21.
25.
The Correct Answer is D
The needle gauge size for subcutaneous injections should be between 25 and 31, depending on the patient’s size and the viscosity of the medication.
A smaller gauge number means a larger diameter needle, which can cause more pain and tissue damage.
Choice A is wrong because 8 is too large for subcutaneous injections and can cause bleeding and bruising.
Choice B is wrong because 20 is also too large for subcutaneous injections and can cause similar complications as choice A.
Choice C is wrong because 21 is still too large for subcutaneous injections and can cause discomfort and injury to the patient.
The needle length for subcutaneous injections should be between ½ inch and ⅝ inch, depending on the amount of subcutaneous tissue present. The nurse should pinch the skin and insert the needle at a 45-degree angle to ensure proper delivery of the medication.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
To find the rate of the pump in ml/hour, you need to first convert the client’s weight from pounds to kilograms. You can do this by dividing the weight by 2.2046 or multiplying it by 0.454.
For example:
297 lbs / 2.2046 = 134.72 kg or 297 lbs x 0.454 = 134.72 kg
Then, you need to multiply the client’s weight in kilograms by the ordered dose in units/kg/hour to get the total units per hour.
For example:
134.72 kg x 12 units/kg/hour = 1616.64 units/hour
Next, you need to set up a proportion to find the rate of the pump in ml/hour using the supplied medication concentration.
For example:
25,000 units / 500 ml = 1616.64 units / X ml Cross-multiply and solve for X:
25,000 x X = 808320 X = 808320 / 25000 X = 32.33 ml/hour
Finally, you need to round your answer to the nearest tenth of a ml/hour as per the medication administration guidelines.
For example:
32.33 ml/hour ≈ 32.3 ml/hour
Therefore, the rate of the pump is 32.3 ml/hour.
Choice A is wrong because it uses a different conversion factor for pounds to kilograms (1 lb = 0.5 kg) which is not accurate.
Choice C is wrong because it uses a different ordered dose (10 units/kg/hour) which is not what the provider has written.
Choice D is wrong because it uses a different supplied medication concentration (20,000 units in 500 ml) which is not what is available.
Correct Answer is B
Explanation
Pulse oximetry works by measuring the amount of light that passes through your finger and reaches a sensor on the other side.
The amount of light that is absorbed by your blood depends on how much oxygen it carries. Nail polish can block or reflect some of the light, making it harder for the pulse oximeter to get an accurate reading of your oxygen level.
Choice A is wrong because the color of your nailbed is not relevant for pulse oximetry.
The pulse oximeter does not measure the color of your nailbed, but the amount of light that passes through it.
Choice C is wrong because the sensor does not react with the nail polish causing an allergic reaction.
The sensor is a non-invasive device that does not touch your skin or nail polish directly.
Choice D is wrong because the chemicals in the nail polish do not cause falsely decreased readings of your oxygen level.
The chemicals in the nail polish do not affect the amount of oxygen in your blood, but only the amount of light that reaches the sensor.
Normal ranges for pulse oximetry vary depending on your health condition and altitude, but generally they are between 95% and 100%. If your pulse oximetry reading is lower than 90%, you may have hypoxia, which means your tissues are not getting enough oxygen.
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