Final answer:
It is true that the luer lock cap needs to be removed when collecting blood from a PICC line to avoid contamination and ensure accurate laboratory results.
Step-by-step explanation:
When collecting blood from a PICC line, it is true that the luer lock cap needs to be removed. A PICC line, or Peripherally Inserted Central Catheter, is a form of intravenous access that can be used for extended periods. Prior to drawing blood, it's essential to remove the luer lock cap to access the blood within the line. This process is a part of standard blood collection protocols to prevent contamination and ensure accurate laboratory results.