Hemoconcentration of a venous blood sample is most often caused when:
The site is prepped with povidone iodine.
The tourniquet is in place for more than 2 minutes.
The specimen is not refrigerated within 30 minutes.
The needle is removed before the tourniquet.
The Correct Answer is B
Choice A Reason:
Prepping the site with povidone iodine is not typically associated with hemoconcentration. Povidone iodine is used as an antiseptic to clean the skin before venipuncture to prevent infection. While it's important to allow it to dry to avoid sample contamination, it does not cause hemoconcentration.
Choice B Reason:
Leaving the tourniquet in place for more than 2 minutes can lead to hemoconcentration. A tourniquet is applied to engorge the veins, making them easier to puncture. However, prolonged application can result in fluid being forced out of the vein into the tissue, increasing the concentration of cells and larger molecules in the blood. This can affect certain laboratory test results by artificially increasing the levels of cellular components.
Choice C Reason:
Not refrigerating the specimen within 30 minutes does not cause hemoconcentration. However, it can affect the stability of certain analytes in the blood sample. Refrigeration is necessary for preserving the integrity of certain components of the blood until analysis, but it is unrelated to the concentration of cells within the sample at the time of collection.
Choice D Reason:
Removing the needle before the tourniquet is released does not cause hemoconcentration. This action might lead to other complications, such as hematoma formation, but it does not affect the concentration of cellular elements in the collected sample.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A Reason:
Submitting laboratory results to the representative for workers' compensation is generally not a violation of patient privacy. This action is often necessary as part of the claims process and is typically done with the patient's consent or as mandated by law.
Choice B Reason:
Discussing laboratory results with a patient's partner without the patient's explicit consent is a violation of patient privacy. Confidentiality is a fundamental principle in healthcare, and disclosing health information to unauthorized individuals, including family members, breaches that confidentiality.
Choice C Reason:
Providing diagnosis codes to a patient's insurance company is a standard procedure and is not considered a violation of patient privacy. This information is necessary for the insurance company to process claims and provide coverage for medical services.
Choice D Reason:
Printing a patient's full name on the specimen label is standard practice and does not violate patient privacy. This is done to ensure that the specimen is correctly identified and matched to the patient, which is critical for accurate diagnosis and treatment.
Correct Answer is C
Explanation
Choice A reason:
A specimen bag is typically used for transporting specimens from the collection site to the laboratory. It is not designed for the disposal of contaminated items such as microscope slides. These bags are not puncture-resistant and do not provide the necessary protection against sharps injuries or contamination.
Choice B reason:
A biohazard bag is used for disposing of items that have been contaminated with potentially infectious materials. While it is suitable for materials like gloves, tissues, or any other items that do not have sharp edges, it is not the appropriate choice for glass slides, which can puncture the bag and pose a risk to handlers.
Choice C reason:
A red sharps container is specifically designed for the disposal of sharps waste, which includes any device that can puncture or cut skin, such as needles, syringes, lancets, and contaminated glass such as microscope slides. These containers are rigid, puncture-resistant, leak-proof, and usually marked with a biohazard symbol, making them the correct choice for disposing of contaminated microscope slides.
Choice D reason:
A medical waste container is a broad term that can refer to various types of containers used for medical waste. However, not all medical waste containers are suitable for sharps disposal. Unless the medical waste container is designed like a red sharps container, it may not be safe for disposing of glass slides.
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