Medical equipment is essential to modern client care, but it also introduces risk when misused, malfunctions, or is poorly monitored. On the Next Generation NCLEX (NGN), questions in this domain focus on client safety, early complication detection, infection prevention, and prioritization.

This section emphasizes commonly tested hospital equipment, especially that used in older adults, post-operative clients, and high-acuity settings.

Learning objectives

By the end of this section, the learner should be able to:

Identify common medical devices and their associated risks
Recognize early signs of device-related complications
Apply safety checks and nursing responsibilities
Prioritize interventions when equipment failure is suspected

Core concept: Equipment supports physiology, not replaces assessment

Medical equipment provides data and support, but the nurse must always assess the client first.

When alarms sound, the first step is to check the client, not the machine.

Nursing accountability & legal responsibility

Medical equipment safety is not just technical; it is a professional responsibility.

The nurse is accountable for:

Verifying correct settings at the start of shift
Ensuring equipment is functioning properly
Reporting malfunction immediately
Documenting:
- Settings
- Client response
- Interventions performed
- Provider notification (if applicable)

If equipment malfunctions:

Remove from patient if unsafe
Tag per facility policy
Notify biomedical engineering
Document objectively

Oxygen delivery devices

Nasal canula

Typically used for oxygen flow rates of 1–6 L/min. Higher flow rates may cause nasal dryness and discomfort.

Oxygenation device — Nasal cannula - Adult

Rebreather mask

Used to deliver high concentrations of oxygen to clients with significant hypoxemia. Ensure the reservoir bag remains partially inflated during use.

alt_text //////Image suggestion: Non-rebreather mask with reservoir bag" — labeled diagram showing the one-way valves and reservoir bag, useful since students often confuse rebreather vs. non-rebreather masks.////////

Common risks

Hypoxia from dislodgement
Dry mucous membranes
Skin breakdown
Oxygen toxicity (high concentrations)

: //////Caption: Common Oxygen Delivery Devices; Illustration type: Comparison chart; Illustration note: Compare common oxygen delivery devices, including nasal cannula and rebreather mask, highlighting typical oxygen delivery, common uses, and key nursing safety considerations.///////

Oxygen safety

Oxygen supports combustion.

Safety measures

Post “No Smoking” signage
Keep oxygen 5–10 feet away from heat sources
Avoid petroleum-based products (e.g., Vaseline)
Ensure humidification if >4 L/min
Secure oxygen tanks upright

Oxygen toxicity

Risk increases with:

High FiO₂ concentrations
Prolonged exposure (>24–48 hours)
Mechanically ventilated clients

NGN tip:: If hypoxia is suspected, apply oxygen first. Then investigate the cause.

Signs may include:

Restlessness
Non-productive cough
Chest pain

Definitions

Hypoxia: Inadequate oxygen delivery to tissues
Ventilation: The movement of air into and out of the lungs
Oxygenation: The process by which oxygen moves from the lungs into the bloodstream
Infiltration: Leakage of non-vesicant fluid into the surrounding tissue
CAUTI: Infection related to indwelling urinary catheter use

NGN tip:: Always verify oxygen flow rate and device placement when SpO₂ declines.

Pulse oximetry

alt_text ////////📷 Image suggestion: “Pulse oximeter placement and limitations” — hand/finger with pulse ox probe, with callouts showing common interference factors (nail polish, cold extremity, motion)./////////

Limitations

Poor perfusion
Cold extremities
Nail polish or artificial nails
Motion artifact

NGN tip:: Pulse oximetry measures oxygen saturation, not ventilation.

Capnography

Capnography measures end-tidal CO₂ (ETCO₂) and reflects ventilation. Capnography is often used with oxygen delivery devices (e.g., specialized nasal cannulas) to monitor ventilation and help detect airway or device-related problems.

This is especially relevant in:

Post-operative clients
Clients receiving opioids
Procedural sedation

Normal ETCO₂: 35–45 mmHg

Early respiratory depression sign: ⬆ Rising ETCO₂ before oxygen saturation drops.

NGN insight:: Pulse oximetry measures oxygenation. Capnography measures ventilation.

: //////Caption: Pulse Oximetry vs Capnography; Illustration type: Comparison chart; Illustration note: Compare pulse oximetry and capnography, emphasizing what each measures, normal values, limitations, and their roles in monitoring oxygenation versus ventilation.///////

Intravenous (IV) therapy equipment

alt_text ////////📷 Image suggestion: “Peripheral IV insertion sites and infiltration vs. phlebitis” — side-by-side diagram or photo comparison showing infiltration (cool, swollen, pale) vs. phlebitis (warm, red, cord-like vein), since these are commonly confused on NCLEX.////////

Potential complications

Infiltration
Extravasation
Phlebitis
Infection
Air embolism (rare but serious)

NGN tip:: Any liquid categorized as a vesicant requires frequent site assessment to detect extravasation early.

IV pump safety & high-alert medications

Infusion pumps are frequently tested due to medication error risk.

High-alert medications:

Insulin
Heparin
Chemotherapy
Vasopressors

Safety checks

Trace tubing from bag to insertion site
Verify rate with order
Double-check pump programming
Label all tubing clearly.

If an occlusion alarm sounds:

Check for kinks
Assess insertion site
Ensure clamps are open

: //////Caption: Safe IV Pump Assessment; Illustration type: Clinical flowchart; Illustration note: Illustrate the sequence for assessing an IV pump alarm: trace tubing, inspect for kinks, verify clamps are open, assess the insertion site, verify pump settings, and respond appropriately.///////

Air embolism recognition

Although rare, signs include:

Sudden dyspnea
Chest pain
Hypotension

Immediate action: If suspected, clamp tubing immediately and position the client in left lateral Trendelenburg position (left side-lying, head down) to trap air in the right atrium.

: //////Caption: Recognizing and Managing an Air Embolism; Illustration type: Clinical flowchart; Illustration note: Illustrate the recognition of sudden dyspnea, chest pain, and hypotension during IV therapy, followed by stopping the infusion, clamping the tubing if appropriate, positioning the client in the left lateral Trendelenburg position, and notifying the provider.///////

Enteral feeding equipment

alt_text //////////📷 Image suggestion: “Enteral feeding tube placement and HOB elevation” — diagram of NG/PEG tube placement with head-of-bed at 30°+ angle labeled, showing correct aspiration-prevention positioning.////////

Key safety considerations

Verify tube placement before feeding
Elevate head of bed ≥30°
Monitor for aspiration
Check residuals per protocol

NGN tip:: Aspiration risk increases when the client is in the supine position.

: //////Caption: Preventing Aspiration During Enteral Feeding; Illustration type: Safety checklist; Illustration note: Illustrate essential enteral feeding safety measures, including verifying tube placement, elevating the head of the bed to at least 30°, monitoring for aspiration, and checking gastric residual volume according to institutional protocol.///////

Urinary catheters

alt_text ////////📷 Image suggestion: “Urinary catheter drainage bag positioning” — diagram showing drainage bag below bladder level, tubing without kinks, to reinforce the “never above bladder level” NCLEX pitfall listed later.////////

Major risks

Catheter-associated urinary tract infection (CAUTI)
Obstruction
Trauma during insertion

NGN tip:: Use indwelling urinary catheters only when clinically necessary and remove them as soon as they are no longer needed.

Suction equipment

alt_text ////////📷 Image suggestion: “Suction catheter technique” — diagram showing suction applied only on withdrawal, not insertion, with max duration labeled (commonly taught as ≤10-15 seconds per pass).//////////

Safety risks

Hypoxia
Mucosal trauma
Dysrhythmias from vagal stimulation

NGN tip:: Suctioning should be brief (typically ≤10–15 seconds per pass) and only as needed.

Bed safety and mobility equipment

alt_text ////////📷 Image suggestion: “Bed safety setup” — labeled diagram showing lowest bed position, locked wheels, call light within reach, and a bed-exit alarm pad.////////

Bed pad: Client exiting bed alarm

Safety principles

Lowest bed position
Wheels locked
Call light within reach
Proper use of alarms

NGN insight:: Bed rails are not restraints unless they restrict voluntary movement.

Alarm management

alt_text ////////📷 Image suggestion: “Alarm response algorithm” — simple flowchart: alarm sounds → assess client first → identify cause → resolve → document, to reinforce the “check patient, not machine” principle from earlier.////////

Key concepts

Do not silence alarms without assessment
Address cause, not just sound
Prevent alarm fatigue through proper settings

NGN tip:: Ignoring alarms is a client safety violation.

: //////Caption: Responding to Medical Equipment Alarms; Illustration type: Illustrate the appropriate response to equipment alarms by emphasizing assessment of the client first, identification of the alarm cause, correction of the underlying problem, and avoidance of simply silencing the alarm.///////

Clinical vignette 1

A client receiving oxygen via nasal cannula has an SpO₂ drop from 95% to 88%. The cannula is found displaced.

(spoiler)

Nursing action: The nurse reapplies the nasal cannula, reassesses the client’s oxygen saturation and respiratory status, ensures the prescribed oxygen is being delivered correctly, and notifies the provider if hypoxemia persists.

Rationale: A displaced oxygen delivery device is a reversible cause of hypoxemia. Restoring oxygen delivery and reassessing the client’s response should occur before escalating care.

Clinical vignette 2

An IV pump alarm sounds. The client reports swelling and discomfort at the IV site.

(spoiler)

Nursing action: Stop the infusion, assess the IV site, remove the catheter if infiltration is confirmed according to institutional policy, elevate the affected extremity as appropriate, and restart the IV at a new site if prescribed.

Rationale: Swelling and discomfort with an IV pump alarm suggest infiltration, which requires prompt intervention to prevent tissue injury.

Common pitfalls on the NCLEX

Fixing equipment before assessing the client
Silencing alarms without investigation
Leaving drainage bags above bladder level
Failing to verify tube placement

Next | 4.3.6 Potential complications of devices and procedures

Medical equipment use and safety

Introduction