Which nurse kept records on sanitation techniques and the effects on health?

Choice A rationale:

The choice "Rectus Femoris" is not the correct answer. The rectus femoris is a muscle located in the thigh and is not a common site for intramuscular injections due to its location and proximity to important structures.

Choice B rationale:

The correct answer is "Vastus Lateralis." Choice B is the correct answer. The vastus lateralis muscle is located on the lateral aspect of the thigh and is a suitable site for intramuscular injections. It is often used in infants and young children or in adults who have limited deltoid muscle mass.

Choice C rationale:

The correct answer is "Dorsogluteal." Choice C is the correct answer. The dorsogluteal muscle, located in the buttocks, has historically been used for intramuscular injections. However, it's important to note that due to the proximity of the sciatic nerve and the potential for incorrect injection technique, this site is used less frequently now.

Choice D rationale:

The choice "Lower abdomen" is not the correct answer. The lower abdomen is not a recommended site for intramuscular injections due to the risk of injuring underlying structures and the potential for subcutaneous injection instead of intramuscular.

Choice E rationale:

The correct answer is "Deltoid." Choice E is the correct answer. The deltoid muscle, located in the upper arm, is commonly used for intramuscular injections, especially for vaccines and smaller medication volumes. However, it has a limited muscle mass and may not be suitable for larger injection volumes.

Choice A rationale:

Applying the pulse oximeter probe to the toe is not the most appropriate location. While toe measurements can be used, the fingers are more commonly used due to their accessibility and accuracy. Edema in the hands could affect the accuracy of readings.

Choice B rationale:

The nurse should apply the pulse oximeter probe to the earlobe. This choice is correct because the earlobe is a well-vascularized and easily accessible area that provides accurate oxygen saturation measurements. Thickened toenails and edema of the hands might compromise readings in those locations.

Choice C rationale:

Applying the pulse oximeter probe to a skin fold is not a recommended site for oxygen saturation measurement. While there are various sites where pulse oximeters can be applied, the earlobe and finger are more suitable due to their consistent blood flow and accessibility.

Choice D rationale:

While applying the pulse oximeter probe to the finger is a common and acceptable practice, in this scenario, edema of the hands could affect the accuracy of the readings. The earlobe is a better choice as it is less likely to be affected by edema and can provide accurate readings.