Which of the following forms commonly accompanies a toxicology drug screen for legal purposes?
Chain of custody
Requisition
Encounter
CMS 1500
The Correct Answer is A
Choice A Reason:
The chain of custody form is crucial in the context of a toxicology drug screen for legal purposes. It is a document that records the sequence of custody, control, transfer, analysis, and disposition of physical and electronic evidence. It is particularly important in legal cases where the results of the toxicology screen can be used as evidence in court. The chain of custody ensures that the sample has been handled properly and that the integrity of the sample has been maintained throughout the testing process.
Choice B Reason:
A requisition form is used to request a specific test or service. While it is an essential document in the process of ordering a toxicology drug screen, it does not serve the same purpose as the chain of custody in terms of legal proceedings. The requisition form typically includes patient information, the tests ordered, and the reason for the test, but it does not track the handling of the sample.
Choice C Reason:
An encounter form, also known as a superbill, is used in medical billing to capture the services provided during a patient's visit. It includes information about the patient's diagnosis, the procedures performed, and the codes for billing purposes. However, it is not specifically related to the legal aspects of a toxicology drug screen.
Choice D Reason:
The CMS 1500 form is the standard claim form used by healthcare providers to bill Medicare and Medicaid services. It is also used by some private insurers and managed care plans. Like the encounter form, it is related to billing and not to the legal chain of custody required for a toxicology drug screen.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason:
The date of specimen collection is crucial for a laboratory report as it provides the context for the test results. It helps in assessing the timeliness and relevance of the results, especially when monitoring conditions that can change rapidly over time.
Choice B reason:
While the phlebotomist's initials may be recorded as part of the internal process for tracking specimen collection, they are not typically included in the patient's laboratory report. The focus of the report is on the patient and the test results, rather than on the personnel who collected the sample.
Choice C reason:
Patient diagnosis is not usually included in a laboratory report because the purpose of the report is to provide test results that may inform a diagnosis. The diagnosis is made by the healthcare provider based on the test results, along with other clinical information.
Choice D reason:
Values of previous tests may be referenced in a patient's medical record but are not a required element on a laboratory report. Each report typically presents the results of the current tests only. Comparisons to previous values, if needed, are made by the healthcare provider.
Correct Answer is D
Explanation
Choice A Reason:
A red-top tube is used for serum determinations in chemistry and should be allowed to clot completely, typically for 30 minutes, before centrifugation. Shipping after only 15 minutes may result in incomplete clotting and potentially inaccurate test results.
Choice B Reason:
Serum should not be separated from a lavender-top tube, as this type of tube contains EDTA and is used for whole blood tests, not serum. This indicates a misunderstanding of the tube's purpose and could lead to compromised test results.
Choice C Reason:
A tiger-top tube, also known as a serum separator tube, is used for various chemistry tests. However, bilirubin is light-sensitive, and specimens for bilirubin testing should be protected from light, not shipped in a clear bag. This could lead to degradation of the bilirubin and inaccurate results.
Choice D Reason:
A green-top tube contains heparin and is used for plasma determinations. Ammonia testing requires the plasma to be placed on ice immediately after collection to inhibit the continued production of ammonia from red blood cells. Therefore, shipping in an icy water mixture is the correct procedure to ensure accurate ammonia levels.
In conclusion, the proper preparation and transport of blood specimens are crucial for the accuracy of laboratory tests. The green-top tube for ammonia testing, shipped in an icy water mixture, is the only option that follows the correct protocol for specimen handling and transport.
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