Recognizing and Managing IV Complications: Phlebitis, Infiltration, and More

By Nancy Kimmel, MSN, FNP, RN, PhD CHMM, MSN-FNP-BC

Introduction: Why mastery of IV complications matters for clinicians and students

Intravenous (IV) therapy is among the most common invasive procedures performed across healthcare settings. It is used for fluid resuscitation, blood collection, chemotherapy, immunosuppressants, vitamin and micronutrient therapy, medication delivery, and emergency access. Because IV lines provide direct access to the vascular compartment, errors or complications can quickly become systemic and life-threatening — from local tissue necrosis to systemic infection, air embolism, or cardiovascular overload.

This detailed review is written for student nurses, nurses, anesthesia techs, veterinary techs, and dentists, and for instructors who teach IV skills. It emphasizes recognition, prevention, and management of common IV complications — particularly phlebitis and infiltration — while integrating technical steps, physiology, documentation practices, and educational strategies that align with professional scope of practice and geriatric care considerations referenced by the National Center for Aging and Development (NCAD) and the National Institute on Aging (NIA). Clinical resources are linked to authoritative agencies for additional reference: CDC, NIH, NLM, NIA, NAPTP, and NTA. For practical training resources, see PCT Institute of Healthcare and Phlebotomy Career Training.

The clinical context: Indications, authorization, and the rapidity of IV consequences

IV therapy should always be performed under appropriate physician authorization when required by institutional policy. Indications include, but are not limited to, blood collection, administration of chemotherapy, delivery of immunosuppressants, parenteral vitamin therapy, and rapid fluid resuscitation. Because intravenous fluids and medications circulate rapidly, an adverse event can lead to prompt systemic effects. For example:

• Improperly administered hypertonic solutions can cause vascular irritation and systemic shifts in fluid balance.
• Bolus infusions delivered too quickly in fragile patients may precipitate cardiovascular overload and acute decompensation.
• Breaks in aseptic technique can lead to catheter-related bloodstream infections that quickly escalate.

Maintaining sterility, verifying drug and solution labels, and documenting authorization and indications are essential protective practices for both patient safety and clinician legal protection.

Vascular anatomy and tissue layers traversed during IV insertion

A deliberate understanding of the anatomy and tissue layers an IV catheter traverses informs successful technique and complication prevention. From skin surface to lumen of the vein, the needle/catheter traverses:

• epidermis
• dermis
• hypodermis/subcutaneous tissue
• venous wall (tunica intima/media/adventitia)

Knowing these layers helps you anticipate resistance, the feel of “flashback,” and the correct needle angle. It also explains why certain medications extravasate or cause tissue injury when they escape the vein.

Vein selection: Best practices and special population considerations

Choosing an appropriate vein is both an art and a science. Optimal sites minimize complications and preserve future access.

Recommended sites and veins

For peripheral IVs, the antecubital fossa is a primary site containing the cephalic, basilic, and median cubital veins that are typically large and less prone to infiltration. When selecting a vein:

• Trace the vein for at least an inch (2–3 cm) to confirm continuity and direction. “Tracing” means visually and tactilely following the vein proximally and distally to ensure a straight segment for catheter placement.
• Avoid areas over joints when possible, because flexion increases risk of dislodgement.
• Avoid hands and legs unless no other options exist, and especially avoid lower extremity cannulation in diabetics or patients with peripheral vascular disease due to increased risk of infection and poor healing.

Special populations

Geriatric patients often have fragile, tortuous veins and thinner skin. Integrate guidance from NCAD and NIA about age-related physiologic changes: venous fragility, thinner dermis, and comorbid conditions (heart failure, renal impairment) that affect fluid balance. Pediatric veins are smaller and require smaller gauge catheters and a slower, gentler technique.

When teaching or supervising student nurses, nurses, anesthesia techs, veterinary techs, and dentists who perform IV access, emphasize individualized assessment and the need to adapt technique to vessel quality and patient condition.

Insertion technique: angles, bevel orientation, and recognizing correct placement

Technical precision during insertion reduces mechanical injury and complication rates. Key technical points include:

• Insertion angle: typically 15–28 degrees relative to the skin surface for peripheral IVs. A lower angle (≈15°) is used for shallow access once the vein is visible; a slightly higher angle (≈20–28°) may be necessary for deeper veins.
• Bevel up: always insert with the needle bevel pointing upward. This approach promotes smooth entry and predictable flashback.
• Look for flashback: a brisk flash of blood in the catheter hub confirms venous entry. Once flashback is seen, advance the catheter slightly and reduce the angle while threading the catheter into the vein to reduce the risk of transfixing the vein.
• Avoid “going through”: if you meet sudden loss of resistance and continue advancing, you can transfix the vein and deposit catheter beyond the lumen. If the catheter advances but there is resistance when flushing, suspect malposition.
• Resistance on flush: if you flush and encounter resistance, the catheter tip may be against the vein wall, in perivascular tissue, or occluded. Do not force the flush. Check position, patency, and consider withdrawing slightly, repositioning, or removing and reinserting as indicated.

Sterile technique and skin antisepsis

IV insertion is a sterile field procedure. Breaks in aseptic technique can lead to local phlebitis or systemic catheter-related bloodstream infections. Best practices include:

• Hand hygiene before and after the procedure (soap and water or alcohol-based rub).
• Skin antisepsis: chlorhexidine is preferred for most adult patients — scrub the insertion site for a full 30 seconds to 1 minute and allow it to dry completely before puncture. The one-minute chlorhexidine cleanse is emphasized in many training curricula because it provides adequate contact time for maximal antimicrobial effect.
• Use of sterile gloves, sterile dressings, and securement devices to minimize movement of the catheter and disruption of the insertion site.
• Maintain a clean field during dressing changes and access manipulations.

Understanding solutions: tonicity, osmolality, and physiologic effects

Knowledge of IV solution properties is essential to avoid iatrogenic complications. Consider tonicity relative to blood and body compartments:

Always read medication and fluid labels carefully. Confusing saline with other medications (e.g., atropine or lidocaine) is a dangerous error. Ensure verification of the right solution, right dose, right patient, right route, and right time, and confirm physician orders when required.

Drip rates, infusion speed, and cardiovascular overload

Infusion rates must be tailored to patient physiology. Rapid infusion in fragile patients (elderly, heart failure, renal impairment) can cause acute cardiovascular overload that may progress to a medical emergency. Signs of overload include:

• Increased heart rate (tachycardia)
• Elevated blood pressure
• Shortness of breath, tachypnea
• Hypoxemia (low oxygen saturation)
• Jugular venous distension, crackles on lung auscultation

Recognize these early and respond by stopping the infusion, placing the patient upright, administering oxygen, and notifying the provider. Use infusion pumps with accurate programming and alarms to minimize rate errors. In continuous education for student nurses, nurses, anesthesia techs, veterinary techs, and dentists who may assist with infusions, reinforce pump programming and monitoring.

Common IV complications: recognition and management

The most frequently encountered complications include phlebitis, infiltration, extravasation, catheter-related infection, catheter occlusion/thrombosis, and air embolism. We will discuss each complication with clinical features, immediate management, and prevention strategies.

Phlebitis

Definition: Inflammation of the vein wall often associated with pain, erythema, warmth, and a palpable cord. Phlebitis may be chemical (irritant medication), mechanical (catheter movement), or infectious.

Clinical signs

• Redness along the vein course
• Pain or tenderness at the insertion site
• Warmth and swelling
• Palpable, tender cord
• Possible purulent drainage (if infectious)

Management

• Immediately stop the infusion and discontinue the catheter if phlebitis is suspected.
• Apply warm compresses to encourage circulation and relieve pain. Evaluate for systemic signs of infection (fever, elevated WBC).
• Initiate alternative venous access away from the site (do not use the same limb if significant phlebitis is present).
• Obtain cultures or notify prescriber for possible systemic therapy if infection is suspected.
• Document the event thoroughly: time, catheter gauge and length, site, signs/symptoms, patient response, and actions taken.

Infiltration

Definition: Leakage of non-vesicant IV fluid into perivascular tissue. Not to be confused with extravasation (see below), which is leakage of a vesicant agent causing tissue injury.

Clinical signs

• Coolness around the site
• Blanching of the skin
• Swelling and tightness
• Absence of blood return, resistance on flush

Management

• Immediately stop the infusion and clamp or remove the catheter.
• Elevate the limb and apply warm compresses unless contraindicated.
• If the infusion contained a medication that requires specific antidote measures (e.g., some chemotherapeutics), follow extravasation protocol—see below.
• Mark the boundaries of edema on the skin and monitor for spread; document size, color, and patient symptoms.

Extravasation

Definition: Leakage of a vesicant medication into tissue causing local cellular injury and possible necrosis (e.g., some chemotherapy agents, concentrated vasopressors).

Recognition and immediate actions

• Stop infusion immediately and do not remove the catheter unless ordered — preserving the catheter may allow aspiration of infiltrated drug.
• Follow institutional extravasation protocol which may include aspiration, antidote administration, and application of warm or cold compresses depending on the agent.
• Consult the prescribing clinician and pharmacy for antidotal therapies and escalation to surgery/plastics if severe tissue injury appears likely.
• Document time, drug name and dose, estimated amount extravasated, and detailed physical findings.

Catheter-related infection (local and bloodstream)

Definition: Localized infection at the insertion site or catheter-related bloodstream infection (CRBSI) when organisms seed the vascular system.

Signs

• Local: erythema, tenderness, purulent drainage at the site
• Systemic: fever, chills, hypotension, unexplained leukocytosis

Management

• Remove the catheter if local infection is confirmed. Obtain cultures of the catheter tip and blood cultures as ordered.
• Initiate empiric antibiotics per institution/physician order if systemic infection suspected.
• Follow strict sterile technique for subsequent access, and consider central line-associated bloodstream infection (CLABSI) prevention bundles if applicable.

Catheter occlusion / thrombosis

Signs include inability to flush, decreased infusion flow, and swelling. Causes include fibrin sheath formation, thrombus at the catheter tip, or mechanical occlusion.

Management

• Do not forcibly flush against resistance. Assess for mechanical kinks or positional occlusion.
• Use pharmacologic thrombolytic agents per protocol (e.g., alteplase for central venous catheters) when appropriate.
• Document attempts, medications used, and effect; if unresolved, replace catheter as ordered.

Air embolism (rare but catastrophic)

Air introduced into the venous circulation can lodge in the right heart or pulmonary circulation, causing sudden cardiovascular collapse. Signs include sudden chest pain, dyspnea, hypotension, cyanosis, altered mental status, and cardiac arrhythmia.

Prevention and immediate management

• Prevent entry of air during line insertion, removal, or when changing tubing — always clamp lines, use occlusive dressings, and prime tubing thoroughly.
• If air embolism is suspected: place the patient in left lateral decubitus and Trendelenburg position (if tolerated), administer 100% oxygen, call a rapid response team, and prepare for advanced cardiac life support interventions.

Assessment tools and grading scales for phlebitis and infiltration

Using standardized scales improves recognition and documentation. Commonly used are:

• Phlebitis scale (grades 0–4) — assessing pain, erythema, edema, palpable cord, and purulent drainage.
• Infiltration scale (grades 0–4) — assessing edema, blanching, coolness, and skin breakdown.

Flushing, blood draws, and timing with medication-dosed IVs

Best practices for flushing and drawing blood from IV lines reduce contamination, medication errors, and false lab results:

• Flush with preservative-free normal saline using the “push-pause” technique to create turbulence and clear the lumen.
• When drawing blood from a line that has been used for medication infusion, wait appropriate times and flush before sampling as directed by facility policy to avoid drug contamination of the specimen. Some medications require a dwell time or a specific volume to be flushed prior to drawing labs.
• Never place a tourniquet above an arm that has an active IV infusion — doing so can cause retrograde flow, increased local pressure, and possible infiltration or dislodgement. If a venipuncture is required on the same limb, consult institutional policy and consider alternative sites.

Labeling, verification, and medication safety

Medication administration errors are a significant cause of IV-related adverse events. Always:

• Read and verify labels carefully — confirm saline vs atropine vs lidocaine, and confirm concentrations and expiration dates.
• Use two-person verification when required by local policy or for high-risk medications (e.g., chemotherapeutics, concentrated electrolytes).
• Document lot numbers and times when appropriate for traceability.

Documentation and legal responsibilities

Comprehensive charting is both a clinical and legal safeguard. Document the following elements for any IV insertion or complication:

• Date and time of insertion or complication discovery
• Catheter gauge, length, and manufacturer (if required)
• Exact anatomic location (e.g., right antecubital fossa — cephalic vein)
• Number of attempts and assistance provided
• Patient response, vital sign trends, and any interventions performed
• Education provided to patient and family
• Notification of provider and orders received

For student nurses and other learners, modeling precise documentation practices is essential. Motorizing accurate charting protects both patient and clinician in the event of later review.

Scope of practice and professional accountability

Know your institutional and state scope of practice. Medical assistants (MAs), for example, must consult supervising nurses or clinicians when IV tasks fall outside delegated authority. Always admit lack of knowledge and seek supervision rather than proceeding unsafely. For student nurses and novice clinicians, supervision and graded responsibility safeguard patients while facilitating learning.

Instructor guidance: preparing the classroom and clinical training

When training new practitioners — whether student nurses, nurses, anesthesia techs, veterinary techs, or dentists who may perform IV access in their scope — instructors should integrate these core principles:

• Preparation: ensure equipment, simulation models, and documentation templates are available. Teach through demonstration, return demonstration, and scenario-based simulation that includes complications.
• Passion: model meticulous technique and patient-centered care. Enthusiasm for safety practices makes a measurable difference in learner engagement.
• Patience: learners need time to develop fine motor skills and clinical reasoning. Provide deliberate, constructive feedback.
• Managing classroom dynamics: balance group instruction with individualized coaching. Use peer assessment and debriefing to reinforce recognition of complications.
• Continuous learning: update content with current evidence, institutional policies, and resources from organizations such as CDC and NIA. Encourage attendance at advanced IV therapy courses and use resources like PCT Institute of Healthcare and Phlebotomy Career Training for curricula and certification guidance.

Applying Erikson’s psychosocial stages in patient and learner education

Erikson’s eight stages of psychosocial development provide a framework to tailor education and support for patients and students. As an educator and clinician, consider the patient’s or learner’s developmental stage when explaining procedures, obtaining consent, or delivering bad news.

Practical applications by stage

• Trust vs. Mistrust (infants): Use caregivers to mediate; reduce sensory distress with swaddling and sucrose where appropriate.
• Autonomy vs. Shame/Doubt (toddlers): Offer simple choices to increase cooperation (e.g., “Do you want this sticker or that one after?”).
• Initiative vs. Guilt (preschoolers): Use play and age-appropriate explanations to reduce fear.
• Industry vs. Inferiority (school-age): Provide a sense of competence by involving the child in simple tasks (holding a bandage).
• Identity vs. Role Confusion (adolescents): Respect privacy and autonomy; provide clear rationales for procedures.
• Intimacy vs. Isolation (young adults): Encourage peer support and collaborative decision-making.
• Generativity vs. Stagnation (middle adulthood): Connect procedures to roles (e.g., caregiving responsibilities) and long-term health goals.
• Integrity vs. Despair (older adulthood): Address legacy, dignity, and autonomy. Use Erikson-informed communication when discussing end-of-life care or invasive procedures.

Using Erikson’s stages helps instructors and clinicians personalize education for student nurses, nurses, anesthesia techs, veterinary techs, and dentists and improves patient adherence and satisfaction.

Geriatric-specific considerations (NCAD and NIA guidance)

Older adults have physiologic changes that increase IV complication risk: fragile veins, reduced cardiac reserve, altered fluid distribution, and polypharmacy. Integrate resources and guidelines from the National Center for Aging and Development (NCAD) and the NIA when designing care plans:

• Use smaller-gauge catheters and soft dressings; secure lines well but avoid constrictive fixation that may injure thin skin.
• Monitor fluid balance and watch for subtle signs of overload (increased respiratory rate, orthopnea) rather than relying solely on blood pressure changes.
• Review medications for agents that increase infiltration risk or confound assessment (e.g., anticoagulants that increase hematoma risk).
• Provide clear, respectful explanation of procedures and involve caregivers as appropriate.

Education and competency assessment for learners

Teaching IV skills requires a structured approach to competency assessment:

• Didactic foundation: anatomy, infection control, solution pharmacology, and complication recognition.
• Simulation practice: use task trainers and simulated complications (e.g., simulate infiltration) to train recognition and response.
• Supervised clinical attempts: document number of successful insertions and difficulty levels; provide remediation when needed.
• Assessment of documentation skills: evaluate accuracy and completeness, including legal elements such as time, gauge, location, and patient response.

Interprofessional considerations: who does what

Team clarity reduces mistakes. Within the healthcare team:

• Student nurses and new nurses should work under supervision until competent. In many institutions, student nurses may perform IVs only under preceptor oversight.
• Anesthesia techs frequently assist with line setup and management in procedural settings and must be versed in IV monitoring and emergency responses.
• Veterinary techs require adjusted techniques for animal patients but share the same principles: asepsis, species-appropriate anatomy, and monitoring for infiltration and extravasation of irritant solutions.
• Dentists who place IV sedation must be proficient in vascular access, recognition of infiltration, and management of airway and cardiovascular complications.
• Medical assistants (MAs) must adhere to defined scope of practice and consult supervising clinicians when IV tasks exceed their authorization.

Quality improvement and system-level prevention strategies

Preventing IV complications is a system responsibility. Quality improvement strategies include:

• Standardized insertion and maintenance bundles that include chlorhexidine skin prep, maximal barrier precautions, and daily review of catheter necessity.
• Use of devices that reduce movement and shear forces on the catheter, such as stabilization devices and securement dressings.
• Mandatory reporting and root-cause analysis for serious complications like extravasation with tissue necrosis or catheter-related bloodstream infection.
• Continual staff education using up-to-date guidance from authorities like the CDC and literature found via the NLM and NIH.

Practical checklists: pre-insertion, insertion, and post-insertion

Utilize checklists to ensure consistent safe practice. A condensed checklist might include:

Pre-insertion

• Confirm indication and physician authorization when required
• Assess patient history and allergies
• Choose site and catheter size; trace vein for at least an inch
• Gather sterile supplies and chlorhexidine; perform hand hygiene

Insertion

• Position patient comfortably and apply tourniquet appropriately (not on limb with current IV)
• Cleanse site with chlorhexidine for the recommended time (allow to dry — one-minute scrub is best practice)
• Insert at 15–28° bevel up; look for flashback; thread catheter and secure
• Flush gently; confirm patency and flow; observe for resistance

Post-insertion

• Secure catheter; apply dressing; document time, gauge, location, and patient tolerance
• Label dressings with date/time and person who placed the line
• Educate patient and caregivers about warning signs and when to notify staff
• Schedule site inspection and dressing changes per institutional policy

Case scenarios: recognizing early subtle signs

Case 1: An 82-year-old with congestive heart failure receives a bolus because of hypotension. Within minutes, she becomes tachycardic and short of breath with new crackles on auscultation. The infusion is stopped and oxygen administered. This is acute cardiovascular overload — immediate cessation of fluids and clinical reassessment are critical.

Case 2: A student nurse notes a blush of redness 3 cm along the line and mild tenderness in a 45-year-old receiving peripheral antibiotics. The catheter is removed and warm compresses applied; no systemic signs are present. Documentation and monitoring suffice; removal prevents progression to more severe phlebitis.

Case 3: During a peripheral IV infusion of a vasopressor in a postoperative patient, the nurse notes sudden blanching and severe pain at the site with a lack of blood return. Extravasation of a vesicant-like agent is suspected. The infusion is stopped, the catheter left in place for possible aspiration, and rapid consultation with the provider and pharmacy is initiated for local antidotal therapy.

Resources and ongoing education

Continued learning is vital. Refer learners and colleagues to evidence-based resources and training programs to refine skills and update knowledge. Useful starting points include institutional protocols, the CDC, the NIA on geriatric issues, and training programs such as PCT Institute of Healthcare and Phlebotomy Career Training for structured curricula.

Final practice points for clinicians and educators

Remember these critical reminders when managing IV therapy and complications:

• Always confirm indications and authorization as appropriate, and read labels carefully to avoid medication errors.
• Prioritize sterile technique — a one-minute chlorhexidine scrub and complete drying time reduces infection risks.
• Select veins thoughtfully, avoid hands/legs in vulnerable patients (especially diabetics), and trace veins for a sufficient length before cannulation.
• Insert at 15–28° with bevel up; watch for flashback and avoid forcing the catheter.
• Monitor infusion rates carefully in fragile patients to prevent cardiovascular overload; know the signs and stop infusion early.
• Recognize and act on phlebitis, infiltration, extravasation, infection, and occlusion promptly with appropriate documentation.
• Admit knowledge limits, consult supervisors when scope is exceeded, and document all steps — time, gauge, location, response — as legal protection and clinical communication.
• As an instructor, use preparation, passion, and patience; apply Erikson’s psychosocial stages to tailor education; and integrate geriatric best practices endorsed by NCAD and the NIA.

For competency development, credentialing information, or further phlebotomy and IV therapy education, consider programmatic resources such as PCT Institute of Healthcare and Phlebotomy Career Training. For additional regulatory and evidence-based guidance, consult the CDC, NIH, and NLM resources.