A dialysis patient in the ICU has a shunt placement in the right forearm and an IV placed in the left hand. Which of the following options best describes the optimal site collection of a CBC?
The left antecubital fossa is the optimal site for collection of a CBC in this patient.
The left antecubital fossa is preferable for collecting a Complete Blood Count (CBC) because it is remote from the dialysis shunt located in the right forearm, minimizing the risk of complications such as contamination or inaccurate results due to shunt-related changes.
Collecting a CBC from the right antecubital fossa is not advisable because it is close to the shunt placement in the right forearm. This proximity increases the risk of obtaining altered results due to the effects of dialysis or possible contamination from the shunt.
While the right hand is further away from the shunt than the right antecubital fossa, it is still not optimal for a CBC collection. The vascular access in the right arm can potentially affect the blood sample quality, leading to inaccurate lab results.
This is the optimal site for a CBC collection because it is located in the opposite arm from the shunt placement, ensuring that the sample is unaffected by any potential complications related to dialysis access. This location provides a more reliable sample for accurate laboratory analysis.
Capillary collection from the left hand is less ideal for a CBC, as it often results in a smaller volume of blood and may yield less precise results compared to venous sampling. For a comprehensive and accurate CBC, venous collection from the left antecubital fossa is preferred.
For a dialysis patient with a shunt in the right forearm, the left antecubital fossa stands out as the best site for collecting a CBC. This choice minimizes the risk of contamination and ensures more reliable test results, while other options either pose risks related to the dialysis shunt or yield less optimal specimens. Thus, selecting the left antecubital fossa is crucial for accurate laboratory diagnosis.
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