The nurse is teaching the client how to prepare 10 units of regular insulin and 5 units of NPH in-sulin for injection. The nurse instructs the client to:
1. Inject air into the regular insulin and then into the NPH insulin
2. Withdraw the regular insulin first
3. Inject air into and withdraw the NPH insulin immediately
4. Inject air into both vials and withdraw the regular insulin first
ANS: 4
The client should be taught to inject air into both vials and withdraw the regular insulin first. Air should be injected into the vial of NPH insulin and then the vial of regular insulin. The regular insulin should be withdrawn after air has been injected into both vials. Air should be injected into the vial of NPH insulin and then the vial of regular insulin. The regular insulin should be with-drawn immediately after injecting the air into the vial of regular insulin. The NPH insulin is then withdrawn.
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