Which of the following locations should a phlebotomist use to anchor a vein during a venipuncture using the evacuated tube method?

Choice A Reason:
Contacting the physician by paging or calling right away is the most appropriate action when critical values are confirmed on a laboratory test. Critical values are defined as those that indicate the patient is in danger of death unless treatment is initiated immediately. Immediate notification of the responsible licensed caregiver is required so that appropriate clinical action can be taken for the patient. This is a standard procedure compliant with CLIA regulation 493.1109(f) and is essential for patient safety.

Choice B Reason:
Leaving a message at the physician's office number is not an adequate response to confirmed critical values. Messages can be overlooked or not checked until the next business day, which could delay necessary urgent medical interventions.

Choice C Reason:
Calling the physician's office on the next business day is not acceptable when dealing with critical values. The urgency of critical results requires immediate action, and waiting until the next business day could result in significant harm or death to the patient.

Choice D Reason:
Faxing the results to the physician's office with a stat fax cover is not sufficient for immediate communication of critical values. While the fax may indicate urgency, there is no guarantee that the fax will be seen immediately by the physician or their staff. Direct communication through paging or calling ensures that the critical information is relayed without delay.

Choice A reason:
Collecting the specimen in an SST (serum separator tube) is not suitable for ABG (arterial blood gas) analysis. SST tubes are used for chemistry tests that require serum separation after centrifugation and are not designed for the preservation of blood gases.

Choice B reason:
Placing the specimen in ice is the correct action when transporting a specimen for ABG analysis. Cooling the specimen slows down metabolic processes, which can alter the levels of gases and pH in the blood if not promptly analyzed. This is particularly important if there is a delay expected in the analysis of the ABG specimen.

Choice C reason:
Collecting the specimen in sodium citrate is not appropriate for ABG analysis. Sodium citrate is an anticoagulant used in coagulation studies and would interfere with the measurement of blood gases and pH levels in an ABG analysis.

Choice D reason:
Inserting the specimen in a light-resistant package is not a standard requirement for ABG specimens. While protecting specimens from light is important for certain types of tests, such as those for bilirubin, it is not necessary for ABG analysis.