Question 1

What medications are commonly administered via subcutaneous injection?

Accepted Answer

Common subcutaneous medications include anticoagulants like heparin and enoxaparin, epinephrine for allergic reactions, insulin, and certain immunizations. These medications are selected for the subcutaneous route because they may be denatured or deactivated by gastric acid if given orally. Subcutaneous administration allows for slower, sustained absorption compared to intravenous routes.

Question 2

Why is subcutaneous injection preferred over oral administration for certain medications?

Accepted Answer

Subcutaneous injection is chosen for medications that would be denatured or deactivated by the acidity of the gastrointestinal tract. This parenteral route bypasses the digestive system, preserving medication efficacy. It also provides slower, more sustained absorption, with some medications absorbing over 24 hours or longer, making it ideal for medications requiring prolonged therapeutic effects.

Question 3

What are the specifications for subcutaneous needles and syringes?

Accepted Answer

Subcutaneous needles are shorter and have a smaller diameter than intramuscular needles, typically measuring less than 5/8 inch in length and 26 gauge or smaller. Subcutaneous injections deliver small medication amounts, usually less than 2 mL. Medication preparations are commonly provided in vials or ampules for withdrawal into a subcutaneous syringe.

Question 4

How does subcutaneous medication absorption compare to intravenous administration?

Accepted Answer

Subcutaneous medication absorption and onset are slower than intravenous routes, with absorption rates sometimes lasting 24 hours or longer. This slower absorption profile makes subcutaneous injection suitable for medications requiring sustained therapeutic levels. The subcutaneous route deposits medication into the tissue layer just below the skin, allowing gradual absorption into the bloodstream.

Question 5

What is the proper process for determining the correct subcutaneous medication dose?

Accepted Answer

The nurse should determine the appropriate medication dose according to the concentration provided on the medication container. After obtaining the medication from the dispensing device, the nurse calculates the correct volume needed based on the stated concentration. Accurate dose determination ensures safe and effective medication administration while following safety checks and ten rights of medication administration.

Question 6

What documentation is required after administering a subcutaneous medication?

Accepted Answer

After administering a subcutaneous medication, the nurse must document the administration in the electronic Medication Administration Record (MAR). This documentation includes verifying the ten rights of medication administration and recording the medication details, dose, time, and route. Accurate MAR documentation ensures medication safety, accountability, and continuity of patient care.

Question 7

How does subcutaneous injection differ from intramuscular injection?

Accepted Answer

Subcutaneous injections deposit medication into the tissue layer just below the skin using shorter, smaller-gauge needles (less than 5/8 inch, 26 gauge or smaller), while preparing and administering intramuscular injections use longer needles that penetrate deeper muscle tissue. Subcutaneous injections deliver smaller volumes (less than 2 mL) and have slower absorption rates, making them suitable for different medication types and therapeutic goals.

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