Which of the following samples is used to measure blood pH and blood gases?
Capillary blood
Arterial blood
Venous blood
Cerebrospinal fluid
The Correct Answer is B
A. Capillary blood: Capillary blood can be used in some cases, especially in infants, but it is less accurate than arterial blood for measuring blood pH and gases.
B. Arterial blood: Arterial blood is the correct sample for measuring blood pH and gases (such as oxygen and carbon dioxide levels) because it reflects the gas exchange occurring in the lungs.
C. Venous blood: Venous blood is not typically used for measuring blood gases as it does not accurately reflect the oxygenation status of the body.
D. Cerebrospinal fluid: Cerebrospinal fluid is not used for measuring blood pH and gases; it is typically analyzed for conditions affecting the brain and spinal cord.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Subcutaneous: Subcutaneous injections are administered beneath the skin but are not considered topical.
B. Transdermal: Transdermal medications are applied directly to the skin and are absorbed through it, which is a form of topical administration.
C. Intramuscular: Intramuscular injections are given into the muscle tissue, not applied topically.
D. Percutaneous: Percutaneous administration involves drugs absorbed through the skin or mucous membranes, but the term is less specific compared to "transdermal" for topical medications.
Correct Answer is D
Explanation
A. Alcohol: Alcohol can be used for cleaning but may not be sufficient for all minor surgical preparations. It is not considered an antiseptic in the context of preoperative skin cleaning.
B. Normal saline: Normal saline is used for irrigation and wound cleaning but does not have antiseptic properties.
C. Disinfectant: Disinfectants are used to clean surfaces and equipment but are not typically used directly on the skin for surgical preparation.
D. Antiseptic: Antiseptics, such as iodine-based solutions or chlorhexidine, are used to clean the skin and reduce the risk of infection before a minor surgical procedure.
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