After heparin is given, how long must you wait before initiating the treatment?

After heparin is given, how long must you wait before initiating the treatment?

• A. 1-2 minutes
• B. 3-5 minutes
• C. 10-15 minutes
• D. 20-30 minutes

Answer: (B)

After giving a heparin bolus, you pause briefly so the anticoagulant can circulate and begin to work in the extracorporeal circuit before blood begins to flow. Heparin acts by enhancing antithrombin III to inhibit thrombin and factor Xa, and the effect is established quickly, but the circuit needs a short window to become adequately anticoagulated. The common waiting interval is about 3-5 minutes, which helps prevent clot formation in the lines and dialyzer as treatment starts. Starting too soon raises the risk of clotting in the circuit, while waiting longer than necessary increases the patient’s exposure to anticoagulation and potential bleeding. While waiting, verify dosing and monitor for signs of bleeding or other adverse effects per protocol.

After giving a heparin bolus, you pause briefly so the anticoagulant can circulate and begin to work in the extracorporeal circuit before blood begins to flow. Heparin acts by enhancing antithrombin III to inhibit thrombin and factor Xa, and the effect is established quickly, but the circuit needs a short window to become adequately anticoagulated. The common waiting interval is about 3-5 minutes, which helps prevent clot formation in the lines and dialyzer as treatment starts. Starting too soon raises the risk of clotting in the circuit, while waiting longer than necessary increases the patient’s exposure to anticoagulation and potential bleeding. While waiting, verify dosing and monitor for signs of bleeding or other adverse effects per protocol.