Final answer:
The heparin sodium concentration commonly used in hemodialysis is 1000 units/mL to prevent blood clotting during the dialysis process.
Step-by-step explanation:
The concentration of heparin sodium commonly used in hemodialysis is 1000 units/mL, which is option 1. This concentration is often used during the dialysis procedure to prevent clotting in the circuit. Different concentrations of heparin may be used for other medical applications, but for hemodialysis, the 1000 units/mL concentration is typically used.
Understanding the concentration is vital in a clinical setting to ensure patient safety and the effective operation of the dialysis process. The use of heparin is essential because it acts as an anticoagulant, preventing the blood from clotting while it is being cleaned by the dialysis machine.