Medical devices and invasive procedures improve outcomes, but they also introduce predictable risks. On the Next generation NCLEX (NGN), learners are expected to recognize early warning signs, prioritize nursing actions, and prevent harm through vigilant monitoring and timely escalation.

This section integrates prior content on post-procedure monitoring, vital signs, electrolytes, and equipment safety, focusing on what can go wrong and how nurses respond first.

Learning objectives

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

Identify common complications associated with medical devices and procedures
Recognize early vs late clinical indicators
Prioritize immediate nursing actions
Apply NGN-style clinical judgment to device-related scenarios

Core concept: Devices bypass natural defenses

Any device that enters the body increases the risk of infection, bleeding, obstruction, or malfunction.

The nurse’s role is anticipation, not reaction.

Early vs late complications

Complications often follow predictable timelines. NGN questions frequently test whether the nurse recognizes when something is abnormal.

Early complications (minutes to hours)

Air embolism
Hemorrhage
Pneumothorax
Acute allergic reaction
Sedation-related respiratory depression

Late complications (days to weeks)

Device-associated infection
Thrombosis
Pressure injury
Device occlusion
Fistula formation

A two-panel timeline showing device-related complications. The 'Minutes to hours' panel depicts a blood vessel with air bubbles (air embolism), a vessel with blood pooling out (hemorrhage), and a pair of lungs with one side collapsed and darkened (pneumothorax). The 'Days to weeks' panel depicts inflamed skin with pus (infection), a blood vessel containing a clot (thrombosis), and a heel with a pressure ulcer (pressure injury). A bottom arrow labeled 'Time since device placement' spans both panels left to right. — Timeline of device-related complications: common early and late complications

Infection-related complications

Common devices involved

Central venous catheters
Urinary catheters
Surgical drains
Endotracheal tubes

Early warning signs

Local redness, warmth, or drainage
Fever or hypothermia
Rising white blood cell count
Altered mental status in older adults

High-risk device-associated infections

Certain devices are strongly linked to specific infections that are frequently tested.

Central venous catheters → CLABSI risk

Monitor insertion site
Assess for unexplained fever
Maintain sterile dressing integrity

Side-by-side comparison of a central line exit site on the upper chest: the normal site shows a clean, dry, intact transparent occlusive dressing over the catheter insertion point with no surrounding redness, while the infected site shows the same type of dressing surrounded by erythema and swelling, with yellow purulent drainage visible under the dressing. — Central line dressing: a normal, clean, dry, intact occlusive dressing compared to an infected site with erythema, swelling, and purulent drainage

Urinary catheters → CAUTI risk

Maintain closed system
Keep bag below bladder
Avoid dependent loops

Endotracheal tubes → ventilator-associated pneumonia (VAP)

Elevate HOB 30-45°
Perform oral care
Monitor secretions

Surgical drains → localized wound infection

Sudden change in drainage color
Foul odor
Increased pain at site

Complications during device removal

Insertion risks are commonly discussed. Removal risks are often overlooked.

Central line removal

Risk: Air embolism
Nursing action: Apply an occlusive dressing immediately after removal and position the client supine during removal to reduce the risk of air embolism (left lateral Trendelenburg is used if an air embolism occurs)

Chest tube removal

Risk: Tension pneumothorax
Nursing action: Apply occlusive dressing immediately

Foley catheter removal

Risk: Urinary retention
Nursing action: Monitor first void within 6-8 hours

Epidural catheter removal

Risk: Epidural hematoma (neurological deficit)
Nursing action: Assess sensation and motor function

Definitions

Device-associated infection: Infection occurring due to the presence of an indwelling device
Hematoma: Localized collection of blood outside blood vessels
Device dislodgement: Partial or complete movement of a device from its intended position

NGN insight: Confusion may be the first sign of infection in older adults, even before fever or other classic symptoms develop.

Bleeding and vascular complications

High-risk procedures

Central line insertion
Arterial line placement
Surgical drain removal
Cardiac catheterization

Key assessment findings

Oozing or frank bleeding
Expanding hematoma
Hypotension
Tachycardia

Air embolism

Risk factors

Central line disconnection
Improper priming of IV tubing
Line removal without occlusion

Clinical signs

Sudden dyspnea
Chest pain
Hypotension
Anxiety or confusion

Medical emergency: Air embolism can cause rapid cardiovascular collapse.

Immediate nursing action: Place the client in the left lateral Trendelenburg position, administer oxygen as indicated, and notify the provider immediately.

A hospital bed tilted with the head end lowered below the feet, showing a patient lying on her side wearing an oxygen mask, labeled 'Left lateral Trendelenburg position,' 'Oxygen mask,' and 'Head lowered (below feet).' Beside the bed, a nurse reaches for a wall-mounted call button/phone labeled 'Call button or phone.' Below, three numbered steps summarize the emergency response: (1) Position the patient — head lowered below feet, turn onto left side; (2) Ensure oxygen — oxygen mask in place; (3) Notify provider — reach for call button or phone. — Recognizing and responding to an air embolism: left lateral Trendelenburg positioning, oxygen, and provider notification

Obstruction and dislodgement

Affected devices

Feeding tubes
Chest tubes
Urinary catheters
Surgical drains

Warning signs

Sudden change in output
Increased pressure or pain
Alarms sounding
Absent expected drainage

A normally functioning chest tube drainage system shows tidaling (fluid rising and falling with respirations) along with expected drainage output; loss of tidaling or a sudden drop in drainage suggests obstruction and should be assessed immediately.

Tissue injury and pressure-related complications

Contributing factors

Prolonged device contact
Edema
Poor circulation
Reduced sensation

Assessment findings

Skin redness or breakdown
Pain or numbness
Swelling

NGN tip: Medical devices are a common cause of hospital-acquired pressure injuries.

A side-view illustration of a woman with three numbered callouts pointing to common pressure injury sites from medical devices: the nasal bridge showing a nasal cannula resting on the nose, the ear showing oxygen tubing looped over it, and the sacrum showing a small area of redness at the lower back just above the buttocks indicating pressure injury risk. — Common device-related pressure injury sites: nasal bridge, ears, and sacrum

Procedure-specific complications

Examples

Lumbar puncture: headache, CSF leak
Thoracentesis: pneumothorax
Endoscopy: bleeding, perforation
Biopsy: infection, hemorrhage

NGN insight: Focus on recognizing the most life-threatening complication, not every possible complication.

Putting it together: NGN prioritization

NGN integration

Sudden change = assess immediately
Device complication + abnormal vital signs = escalate immediately
Airway and circulation override device concerns

Next | 4.4.1 Medical emergencies

Potential complications of devices and procedures

Introduction

This section integrates prior content on post-procedure monitoring, vital signs, electrolytes, and equipment safety, focusing on what can go wrong and how nurses respond first.

Learning objectives

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

Identify common complications associated with medical devices and procedures
Recognize early vs late clinical indicators
Prioritize immediate nursing actions
Apply NGN-style clinical judgment to device-related scenarios