A nurse is preparing to administer heparin subcutaneously to a client who has a deep vein thrombosis. Which technique is correct?

Cleanse the skin with an alcohol swab, insert the needle, aspirate for blood return, and inject the heparin.

Cleanse the skin with an alcohol swab, insert the needle, aspirate, inject the heparin, and massage the site.

Cleanse the skin with an alcohol swab, insert the needle using a Z-track method, inject the heparin, and observe for bruising.

Cleanse the skin with an alcohol swab, insert the needle, inject the heparin, apply pressure, and observe for bleeding.