Which of the following should be collected first for tests including CBC, chemistry panel, lead, and a toxicology screen via capillary puncture?
Red top tube
Lavender top tube
Light blue top tube
Royal blue top tube
The Correct Answer is B
Choice A Reason:
The red top tube is typically used for serum determinations in chemistry, serology, and blood bank. It contains no additive or may contain a clot activator. The red top tube is not the first choice for capillary puncture order of draw because it is designed for tests that require serum and not whole blood.
Choice B Reason:
The lavender top tube is used for whole blood hematology determinations, as it contains EDTA as an anticoagulant. According to the order of draw for capillary punctures, the EDTA tube should be collected first to ensure adequate volume and accurate hematology test results. This makes the lavender top tube the correct choice for the first collection in this scenario.
Choice C Reason:
The light blue top tube contains sodium citrate and is used for coagulation tests. In venipuncture, it is drawn after the blood culture bottle and before other tubes to prevent contamination with additives from other tubes. However, for capillary punctures, it is not the first choice as hematology tests take precedence.
Choice D Reason:
The royal blue top tube is used for trace element, toxicology, and nutrient determinations². While it may be used for lead and toxicology screens mentioned in the question, it is not the first tube to be drawn in a capillary puncture sequence. The EDTA tube (lavender top) is drawn first to prevent clotting and ensure accurate CBC results.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason:
When encountering a patient who appears motionless and cyanotic, the first action should be to assess their level of consciousness. Asking loudly if they are okay can help determine if the patient is responsive or unresponsive. If there is no response, this indicates that the patient may be unconscious and requires further immediate assessment and potential intervention.
Choice B reason:
The head-tilt-chin-lift maneuver is used to open the airway of an unresponsive patient who is not suspected of having a spinal injury. However, this is not the first step. Before performing any maneuvers, it is essential to determine the patient's level of consciousness and whether they are breathing.
Choice C reason:
Administering rescue breaths is part of the process of cardiopulmonary resuscitation (CPR), which is only initiated after confirming that the patient is unresponsive and not breathing normally. This step comes after checking for responsiveness and breathing.
Choice D reason:
Looking, listening, and feeling for breathing movements is part of the assessment to determine if the patient is breathing normally. This is done after establishing unresponsiveness but before initiating CPR. It is a critical step, but it follows after confirming that the patient does not respond to verbal stimuli.
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.
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