A patient receives an intramuscular injection in the gluteal region and later reports numbness and tingling at the injection site. Which error is most likely responsible?

The injection was administered into the dorsogluteal muscle, risking sciatic nerve injury

The medication was mixed with an incompatible solution before injection

The injection site was not cleaned with antiseptic prior to administration

The needle length was too short to reach the muscle tissue

A nurse plans to give a patient 2 mg of Bumetanide intravenously. Which vital sign must be checked first to ensure safe administration?

Blood pressure to confirm it is within the normal range

Respiratory rate to rule out bradypnea

Heart rate to verify it is not tachycardic

Serum potassium level to detect hyperkalemia

A patient on a transdermal patch for mild cardiac pain asks why the patch should not be placed on the same spot each time. What is the best explanation?

Rotating sites prevents skin irritation and maintains drug absorption

Changing locations reduces the risk of systemic side effects

Applying it to a new area each time avoids allergic reactions

Using the same site ensures a steady drug reservoir under the skin

During preparation of a medication, a nurse must withdraw the drug from a multidose vial before drawing from an ampoule. Why is this sequence recommended?

It ensures the larger volume is drawn first for accurate dosing

It prevents the ampoule from breaking due to pressure changes

It allows the nurse to verify the vial’s expiration date first

A patient requires a high FiO₂ of 80% for severe hypoxemia. Which oxygen delivery device can reliably provide this concentration?

Venturi mask set at the appropriate flow rate

Simple face mask delivering 5–10 L/min

Non‑rebreather mask at 10–15 L/min

Nasal cannula delivering 1–6 L/min

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Understanding Intramuscular Injection Sites and Nerve Safety

Intramuscular (IM) injections are a common route for delivering medications quickly into the bloodstream. However, the choice of injection site is critical to avoid complications such as nerve injury.

Key Concept: Dorsogluteal vs. Ventrogluteal Site

Dorsogluteal site (upper outer quadrant of the buttock) is associated with a higher risk of sciatic nerve injury if the needle is placed too medially.
Ventrogluteal site (placed on the hip) is considered safer because it is farther from major nerves and blood vessels.

When a patient reports numbness and tingling after an IM injection in the gluteal region, the most likely error is administering the injection into the dorsogluteal muscle, risking sciatic nerve trauma.

Best Practices for Safe IM Injection

Choose the ventrogluteal site for most gluteal injections.
Use an appropriate needle length (typically 1‑1.5 inches for adults) to reach the muscle.
Clean the skin with an antiseptic and allow it to dry before injection.
Insert the needle at a 90-degree angle to ensure deep muscle penetration.

Monitoring Vital Signs Before Diuretic Administration

Loop diuretics such as Bumetanide are potent agents that can cause rapid fluid loss and affect blood pressure. Prior to administration, nurses must assess the patient’s hemodynamic status.

Why Blood Pressure Is the First Vital Sign to Check

Bumetanide reduces intravascular volume, which can lead to hypotension. Ensuring the patient’s blood pressure is within a safe range (e.g., systolic > 90 mmHg) helps prevent adverse events like dizziness, falls, or renal hypoperfusion.

Check blood pressure before the dose.
If the pressure is low, consider holding the medication and notifying the prescriber.
After administration, re‑evaluate blood pressure to monitor for changes.

Additional Monitoring Considerations

Assess serum electrolytes, especially potassium, as loop diuretics can cause hypokalemia.
Observe for signs of dehydration: dry mucous membranes, decreased skin turgor, and tachycardia.
Document the patient’s baseline vitals and any post‑administration changes.

Transdermal Patch Application: Site Rotation and Skin Health

Transdermal patches provide continuous drug delivery through the skin. Proper site selection and rotation are essential to maintain efficacy and prevent skin complications.

Why Rotate Patch Sites?

Repeatedly applying a patch to the same area can cause local skin irritation, erythema, and reduced drug absorption due to skin barrier changes. Rotating sites distributes the drug’s effect across a larger skin surface, preserving the integrity of the stratum corneum.

Choose clean, dry, hairless skin on the chest, upper back, or upper arm.
Avoid areas with cuts, rashes, or excessive hair.
Document the location each time to ensure proper rotation.

Patient Education Tips

Explain that rotating sites prevents irritation and maintains consistent drug levels.
Instruct patients to inspect the skin daily for redness or itching.
Advise against sharing patches or re‑using a previously applied patch.

Medication Preparation: Preventing Cross‑Contamination

When preparing medications from multiple containers, the order of withdrawal matters to maintain aseptic technique.

Sequence Rationale

Drawing medication from a multidose vial before accessing an ampoule reduces the risk of contaminating the vial with ampoule contents. Ampoules are typically opened just before use, and any spillage can introduce microorganisms into the vial, compromising all subsequent doses.

First, verify the vial’s expiration date and integrity.
Withdraw the required dose from the vial using a sterile syringe.
Open the ampoule, draw the needed volume, and combine as ordered.
Never return any leftover medication to the vial.

Best Practices for Aseptic Technique

Perform hand hygiene before and after preparation.
Use a clean, flat surface and keep all containers within the sterile field.
Label syringes clearly with drug name, concentration, and patient ID.

Oxygen Therapy: Selecting the Correct Delivery Device for High FiO₂

Patients with severe hypoxemia often require a high fraction of inspired oxygen (FiO₂). Not all oxygen delivery devices can reliably provide an FiO₂ of 80%.

Why a Venturi Mask Is Ideal

The Venturi mask uses the principle of air‑entrainment to deliver a precise FiO₂, ranging from 24% up to 80% depending on the selected adapter and flow rate. This precision is crucial for patients who need a consistent high concentration of oxygen.

Set the appropriate Venturi valve for 80% FiO₂ (typically the orange or red adapter).
Ensure the flow rate matches the device’s specifications (often 15 L/min for the highest FiO₂).
Monitor the patient’s oxygen saturation and adjust as needed.

Devices Not Suitable for 80% FiO₂

Simple face mask: Provides 40‑60% FiO₂, variable with breathing pattern.
Non‑rebreather mask: Can deliver up to ~70% FiO₂ but is less reliable at 80%.
Nasal cannula: Limited to 24‑44% FiO₂.

Clinical Tips

Confirm the mask fits snugly to prevent room‑air entrainment.
Check for signs of CO₂ retention when using high‑flow devices.
Document the device, flow rate, and target FiO₂ in the patient’s chart.

Pharmacology and Clinical Nursing Practices