ecognize It Early. Respond Correctly.
Why early recognition—not reaction—is the foundation of safe infusion therapy
Standards anchor: This article is informed by the 2024 Infusion Nurses Society Infusion Therapy Standards of Practice, 9th Edition, including standards addressing phlebitis, infiltration and extravasation, vascular-access-device occlusion, infection, catheter damage, patient assessment, adverse events, documentation, and clinically indicated device removal. [1] PubMed
Recognition Precedes Rescue
Most serious infusion events do not begin dramatically.
They begin with something small.
A patient says the IV “feels different.” The infusion starts running more slowly. A vein becomes tender. The patient becomes unusually warm, pale, nauseated, lightheaded, short of breath, or anxious. The pump alarms. Flow stops. Blood return disappears. The dressing looks slightly wet. A hand begins to swell. The patient reports pressure in the chest or tightness in the throat.
Those findings are not inconveniences to work around.
They are clinical information.
Peripheral intravenous catheters are so commonplace that their risks can be underestimated. Yet a 2024 systematic review and meta-analysis involving 478,586 peripheral intravenous catheters found that 36.4% failed before completion of therapy. Infection was relatively uncommon per individual catheter, but infiltration, phlebitis, occlusion, dislodgement, and other forms of catheter failure remain substantial patient-safety concerns. [2] An interdisciplinary 2024 expert consensus similarly emphasized that peripheral IV complications should not be regarded as an inevitable or acceptable consequence of therapy. [3] PubMed
This matters in every infusion environment, including outpatient nutrient therapy.
The safest clinician is not just the clinician who can start an IV successfully. It is the clinician who recognizes when the clinical picture has changed, stops assuming, determines what is occurring, and intervenes before a small problem becomes a significant one.
Recognition precedes rescue.
The First Rule: Do Not Infuse Through a Question Mark
A patient develops pain at the IV site.
The pump begins alarming.
The flow stops.
The patient suddenly feels faint.
The vein looks different.
There is resistance when flushing.
The patient says, “My throat feels funny.”
The wrong response is to normalize the finding, dismiss it, or simply turn down the rate and continue.
The first responsibility is to determine what changed and why.
Safe response begins by stopping or pausing administration when clinically appropriate, remaining with the patient, assessing the vascular-access site and the patient simultaneously, obtaining pertinent vital signs, identifying exactly what is being administered, and determining whether the problem is primarily local, systemic, or both.
An infusion should never continue merely because the bag is almost finished.
And symptoms should never be dismissed as “detox,” a “healing reaction,” anxiety, or normal infusion discomfort until clinically important causes have been assessed.
A patient develops pain at the IV site.
The pump begins alarming.
The flow stops.
The patient suddenly feels faint.
The vein looks different.
There is resistance when flushing.
The patient says, “My throat feels funny.”
The wrong response is to normalize the finding, dismiss it, or simply turn down the rate and continue.
The first responsibility is to determine what changed and why.
Safe response begins by stopping or pausing administration when clinically appropriate, remaining with the patient, assessing the vascular-access site and the patient simultaneously, obtaining pertinent vital signs, identifying exactly what is being administered, and determining whether the problem is primarily local, systemic, or both.
An infusion should never continue merely because the bag is almost finished.
And symptoms should never be dismissed as “detox,” a “healing reaction,” anxiety, or normal infusion discomfort until clinically important causes have been assessed.
Is the Problem Local—or Systemic?
This distinction is one of the most important skills in infusion practice.
| Finding | Think first about |
| Swelling around catheter, cool or taut tissue, leaking, slowed infusion, altered blood return | Infiltration/extravasation |
| Burning or significant pain during infusion | Infiltration, extravasation, chemical irritation, phlebitis |
| Erythema, warmth, tenderness along vein, palpable cord | Phlebitis/thrombophlebitis |
| Bruising or focal swelling after venipuncture | Hematoma |
| Resistance to flushing or inability to aspirate | Occlusion, catheter position, mechanical problem |
| Catheter visibly backed out or dressing/device position changed | Dislodgement |
| Pallor, diaphoresis, nausea, yawning, bradycardia, lightheadedness | Vasovagal response |
| Urticaria, generalized itching, angioedema, wheezing, throat symptoms, hypotension | Hypersensitivity/anaphylaxis |
| Flushing, warmth, hypotension or lightheadedness during magnesium-containing infusion | Consider rate-related magnesium effect while excluding more serious causes |
| Palpitations, weakness, paresthesias, ECG change, marked BP change | Electrolyte/rate-related reaction; systemic assessment required |
| Dyspnea, hypoxemia, crackles, increasing respiratory effort, pulmonary/peripheral edema | Fluid intolerance/volume overload |
| Chest pain, new neurologic symptoms, severe respiratory distress, persistent hypotension or altered consciousness | Emergency evaluation |
The key is not to force every reaction into one category. A patient can have more than one problem simultaneously. A partially dislodged catheter can extravasate an irritating solution. A vasovagal event can occur during venipuncture. A hypersensitivity reaction can develop while the IV site itself remains completely normal.
Treat the patient—not merely the catheter.
Infiltration and Extravasation: Similar Appearance, Very Different Consequences
The terms infiltration and extravasation are sometimes used casually as if they mean the same thing. They do not.
Infiltration generally refers to inadvertent leakage of a nonvesicant solution from the vascular space into surrounding tissue.
Extravasation involves leakage of a solution or medication capable of producing more significant tissue injury.
That distinction matters because tissue injury is governed not only by the volume of fluid outside the vessel but by the characteristics of the infusate itself.
High osmolarity, extremes of pH, direct cellular toxicity, vasoconstrictive properties, and certain electrolyte concentrations can increase injury potential. Noncytotoxic agents can cause clinically significant extravasation injury; tissue damage is not limited to chemotherapy. [4,5] PubMed
Calcium is a clinically important example. Current prescribing information for IV calcium gluconate specifically warns that extravasation can produce soft-tissue inflammation, calcinosis, ulceration, necrosis, and secondary infection. [6] DailyMed
What should trigger concern?
A patient may report aching, stinging, pressure, burning, tightness, numbness, or simply that the site “doesn’t feel right.”
The clinician may observe edema, coolness, blanching, discoloration, leaking, decreased flow, firmness, changes in surrounding tissue, altered blood return, or a pump pressure alarm.
Importantly, absence of severe pain does not prove that the catheter remains intravascular.
Patients with neuropathy, altered cognition, impaired communication, fragile tissue, or diminished sensation may not report symptoms typically expected with an infiltration.
The response matters
When infiltration or extravasation is suspected, stop administration promptly.
If a potentially tissue-damaging agent has extravasated, do not reflexively flush the catheter. Flushing may introduce more of the remaining agent into the tissue.
For suspected extravasation, the catheter is commonly left in place initially when clinically appropriate so that residual medication may be aspirated and an antidote administered through the existing access if indicated by the agent-specific protocol. The administration tubing should be disconnected as appropriate, the infusate identified, and an evidence-based extravasation protocol initiated. INS guidance specifically addresses aspiration before peripheral catheter removal when vesicant extravasation has occurred. [1] Ochsner MLI
Elevation may be appropriate in many cases. Thermal treatment, however, must be agent specific. Heat and cold are not interchangeable, and neither should be selected by habit. Published recommendations for noncytotoxic extravasations differentiate management according to the mechanism of tissue injury; antidotes such as hyaluronidase may be appropriate for selected agents, while other extravasations require different interventions. [4,5] PubMed
Document the site carefully. Note the solution, concentration, estimated volume extravasated when it can reasonably be determined, symptoms, neurovascular findings, interventions, patient response, notifications, and follow-up plan. Measure and photograph the affected area when permitted by organizational policy.
Progressive pain, blistering, expanding swelling, impaired capillary refill, paresthesia, motor changes, diminished pulses, tissue ischemia, ulceration, or concern for compartment syndrome requires urgent escalation.
A small IV catheter can produce a large tissue injury if the wrong solution leaves the vessel.
Phlebitis: The Vein Is Telling You Something
Phlebitis is inflammation of the vein and may have mechanical, chemical, infectious, or mixed causes.
Mechanical irritation may result from catheter movement, an inappropriate catheter-to-vessel relationship, poor stabilization, or placement near areas of flexion.
Chemical phlebitis may develop when the vascular endothelium is exposed to irritating concentrations, extremes of pH, high osmolarity, or other physicochemical stressors.
Infectious phlebitis raises a different level of concern and may be associated with contamination, infection at the catheter site, or more extensive infection.
INS Standard 43 specifically addresses assessment and management of phlebitis. CDC guidance also recommends removing a peripheral catheter when signs of phlebitis—such as warmth, tenderness, erythema, or a palpable venous cord—develop. [1,7] Ochsner MLI
A clinician should not just slow the infusion and “see if it gets better” when a catheter-associated vein becomes painful and inflamed.
Stop the infusion. Assess the site and the extent of inflammation. Remove the peripheral catheter when clinically indicated. If continued access is required, select a new appropriate vessel and site rather than attempting to salvage an inflamed vein.
Warm compresses may provide comfort in uncomplicated cases when appropriate to policy and presentation, but substantial swelling, purulent drainage, fever, progressive erythema, a palpable tender cord extending beyond the catheter site, or systemic symptoms warrant evaluation for infection, superficial thrombophlebitis, deeper thrombosis, or another complication.
The purpose is not just to replace the IV. It is to understand why the vein failed before exposing another vessel to the same conditions.
Hematoma: A Mechanical Event That Still Requires Assessment
A hematoma occurs when blood escapes from the vessel into surrounding tissue, commonly during venipuncture, after vessel-wall injury, or after catheter removal when adequate hemostasis is not achieved.
The area may become swollen, bruised, firm, tender, or discolored.
Once a meaningful hematoma forms around a peripheral catheter, infusion should not continue through a compromised site. Remove the catheter as appropriate and apply direct pressure until hemostasis is achieved. Pressure may need to be maintained longer in patients receiving anticoagulants, antiplatelet medications, or those with bleeding disorders.
An initial cold application may be used when appropriate to local policy and clinical presentation to limit bleeding and swelling.
The important point is to reassess rather than simply place another catheter.
Why did the hematoma occur? Was the vessel excessively fragile? Was the catheter advanced through the posterior wall? Was excessive probing used? Is the patient anticoagulated? Is there impaired platelet function? Is the selected vessel appropriate? Vascular access should become more thoughtful after a complication, not merely more persistent.
Occlusion: Never Solve Resistance With Force
An occlusion may be mechanical, thrombotic, medication-related, or positional.
A clamp may be closed.
Tubing may be kinked.
The catheter may be against the vessel wall.
A dressing may be creating tension.
Precipitate may have formed.
A thrombus may be present.
The catheter may have migrated.
The response to resistance should never be greater pressure.
Do not force a flush.
Forcing fluid against an obstruction can damage the catheter, dislodge material, increase intraluminal pressure, contribute to catheter rupture, or—in the presence of infiltration—drive additional fluid into tissue.
INS Standard 46 emphasizes routine assessment of vascular-access-device patency and defines patency through appropriate blood return and flushing without resistance. INS further emphasizes the importance of reliable patency when vesicants are administered. Infusion Nurses Society
Begin by looking for simple mechanical causes: clamps, connectors, tubing, arm position, catheter stabilization, and external compression.
For a peripheral IV, if reliable patency cannot be established, the safer strategy is generally to discontinue that device and obtain appropriate new access rather than repeatedly manipulating a questionable catheter.
For a central vascular access device, the problem requires a more structured determination of cause. Mechanical obstruction, catheter-tip position, precipitate, fibrin formation, or thrombotic occlusion may require different interventions. Imaging, pharmacy consultation, or vascular-access expertise may be appropriate.
An occluded line is not just a frustrating line.
It may be diagnostic information about the device.
Catheter Dislodgement: Do Not Put It Back
A catheter that has partially backed out should not be advanced back into the vessel.
Once the external portion of a catheter has been exposed, sterility cannot be assumed. Manipulating it back through the insertion site also creates risk of contamination, vessel trauma, and malposition.
For a partially dislodged peripheral IV, stop the infusion and remove and replace the catheter when continued access is needed.
After removal, inspect the device to verify that the catheter is intact. INS specifically recommends evaluating the removed catheter for completeness and immediately escalating if a retained catheter fragment is suspected. [1] Ochsner MLI
Suspected migration of a central vascular access device requires a different response. Stop using the device until position and function are appropriately evaluated according to organizational policy and the device involved.
Never trade safety for convenience because the patient is “a difficult stick.”
The Vasovagal Reaction: Common, Usually Benign—and Easy to Confuse With Something More Serious
Venipuncture, pain, anxiety, visual stimuli, or other procedural triggers may produce a vasovagal response.
The patient may become pale, sweaty, nauseated, lightheaded, weak, or briefly unconscious. Bradycardia and hypotension are common physiologic features.
Stop the procedure or infusion if appropriate, protect the patient from falling, position the patient safely—typically supine when tolerated—assess airway, breathing, and circulation, obtain vital signs, and monitor recovery.
The challenge is not recognizing classic vasovagal syncope.
The challenge is not mistakenly calling a dangerous systemic reaction vasovagal.
A patient developing throat tightness, wheezing, urticaria, angioedema, significant respiratory difficulty, persistent hypotension, or multisystem symptoms during an infusion should not be casually labeled “vasovagal” simply because dizziness is present.
Likewise, anaphylaxis does not always present with dramatic skin findings.
When the distinction is uncertain, and anaphylaxis is clinically suspected, delaying treatment can be dangerous.
Hypersensitivity and Anaphylaxis: Epinephrine Comes First
Anaphylaxis is an acute systemic hypersensitivity reaction that can progress rapidly.
Early manifestations may include generalized flushing, pruritus, urticaria, swelling of the lips or tongue, throat tightness, cough, wheezing, stridor, dyspnea, gastrointestinal symptoms, hypotension, or altered consciousness.
If an infused substance is a suspected trigger, stop exposure immediately.
Rapidly assess airway, breathing, circulation, mental status, and skin. Activate the clinic’s emergency response and emergency medical services as indicated.
Current World Allergy Organization guidance identifies intramuscular epinephrine as first-line treatment for anaphylaxis. The recommended healthcare-professional dose is 0.01 mg/kg of 1 mg/mL epinephrine up to a maximum of 0.5 mg in adults, administered intramuscularly into the anterolateral thigh; dosing may be repeated every 5 to 15 minutes when necessary. [8] World Allergy Organization Journal
Positioning also matters. Most patients with cardiovascular compromise should remain recumbent unless respiratory distress requires a position that improves breathing. Sudden standing can worsen circulatory collapse. Oxygen, IV crystalloid resuscitation, cardiopulmonary resuscitation, and additional advanced interventions should be used when clinically indicated and within appropriate scope and emergency protocols. [8] World Allergy Organization Journal
Antihistamines and corticosteroids are not substitutes for epinephrine in anaphylaxis.
And routine IV bolus epinephrine should not replace IM epinephrine. IV epinephrine carries significant risk and belongs in appropriately monitored advanced resuscitation circumstances with clinicians trained in its use. [8] World Allergy Organization Journal
Every IV clinic should have a written anaphylaxis protocol, immediately accessible epinephrine, appropriate emergency equipment, trained staff, and rehearsed emergency procedures.
An emergency plan that no one has practiced is not an emergency system.
Fluid Overload: Volume Is a Drug Too
In nutrient therapy, attention naturally gravitates toward the nutrients in the bag.
But the fluid itself has physiologic effects.
Five hundred milliliters is not physiologically equivalent in every patient.
A healthy 30-year-old with normal renal and cardiac function may tolerate a volume very differently from an older adult with impaired diastolic function, chronic kidney disease, pulmonary hypertension, low body mass, or reduced physiologic reserve.
IV fluid therapy should therefore be treated as therapy—not hydration by default.
NICE guidance emphasizes assessment of cardiac and renal disease, fluid status, blood pressure, respiratory status, pulmonary and peripheral edema, kidney function, electrolytes, fluid balance, and response to therapy. Lower fluid volumes may be appropriate in older or frail individuals and in those with renal impairment or heart failure. [9] Nice
During an infusion, new dyspnea, orthopnea, cough, increasing respiratory rate, decreasing oxygen saturation, crackles, peripheral edema, jugular venous distention, or a meaningful change in hemodynamics should prompt reassessment.
If fluid intolerance or pulmonary edema is suspected, stop or significantly reduce fluid administration as clinically appropriate, assess airway and breathing, position the patient to support respiration, monitor oxygen saturation and vital signs, provide supplemental oxygen when indicated, and obtain urgent medical or emergency evaluation depending on severity.
Do not finish the bag because the patient “only has 100 mL left.”
The physiology has already answered the question.
Electrolyte and Rate-Related Reactions: The Same Dose Can Behave Differently at a Different Rate
Dose matters.
Concentration matters.
Dilution matters.
Renal clearance matters.
And rate matters.
That principle is especially important in IV nutrient therapy.
Magnesium
Parenteral magnesium can produce warmth, flushing, sweating, and vasodilation. With excessive exposure or inadequate clearance, more significant hypotension, depressed reflexes, CNS depression, bradycardia, and respiratory depression can occur. Magnesium is renally eliminated, making kidney function clinically important. Current prescribing information specifically directs slow administration and careful clinical monitoring. [10] DailyMed
A patient becoming markedly flushed or hypotensive during a magnesium-containing infusion should not automatically be reassured that this is “normal magnesium.”
Stop or pause the infusion as appropriate, assess the patient, confirm the formulation and rate, obtain vital signs, and determine severity before deciding whether therapy can safely continue at a modified rate.
Potassium
Potassium deserves even greater respect.
Concentrated potassium chloride must be diluted before IV administration. Current prescribing information warns that undiluted direct IV administration can be fatal and states that potassium should be delivered at a controlled rate with appropriate monitoring. High concentrations require central administration, and rapid administration can produce life-threatening hyperkalemia and cardiac arrest. [11] DailyMed
Peripheral potassium can also produce pain and phlebitis.
Burning at the site should therefore lead to assessment of both the catheter and the concentration being delivered—not encouragement to “tough it out.”
Calcium
Calcium demonstrates both local and systemic rate-related risk.
Extravasation may produce calcinosis and tissue necrosis, while rapid IV calcium can produce vasodilation, hypotension, bradycardia, arrhythmias, syncope, and cardiac arrest. Current calcium gluconate labeling specifically warns against rapid administration. [6] DailyMed
These examples reinforce a foundational infusion principle:
A formulation is not defined only by what is in the bag. It is defined by what is in the bag, how concentrated it is, how much is being delivered, through what access, to which patient, and how quickly it enters the circulation.
Rate-Related Does Not Mean Harmless
One of the most common mistakes in IV nutrient therapy is to assume that if symptoms improve when the infusion is slowed, the event was therefore insignificant.
That conclusion does not necessarily follow.
Improvement after reducing a rate may suggest a rate-related mechanism, but it does not eliminate the need to assess what occurred.
When new symptoms arise during infusion, the clinician should consider the patient, vascular access, formulation, total administered dose, concentration, pump programming, actual infusion rate, renal and cardiovascular function, concurrent medications, and timing of symptoms.
The correct sequence is:
Recognize → Stop or pause → Assess → Identify → Intervene → Reassess.
Not:
Symptom → Slow the pump → Hope.
When the Site Looks Fine, but the Patient Does Not
This is where experienced infusion practice becomes especially important.
A systemic infusion reaction may occur with a perfectly intact IV.
Conversely, a severe local extravasation may occur while the patient’s systemic vital signs remain normal.
Do not let a normal IV site falsely reassure you when the patient is deteriorating.
And do not let stable blood pressure falsely reassure you when the hand around the catheter is becoming tense, pale, painful, or swollen.
Two assessments must occur in parallel:
What is happening to the vascular access?
And:
What is happening to the patient?
That distinction prevents tunnel vision.
The Patient Should Never Have to Convince You Something Is Wrong
Patients often recognize catheter dysfunction before the clinician can see it.
“It burns.”
“My arm feels tight.”
“That feels different than before.”
“My fingers feel strange.”
“I feel hot.”
“I feel like I might pass out.”
“My throat feels weird.”
Those statements deserve assessment.
Do not teach patients that discomfort is simply the price of IV therapy.
Instead, before beginning an infusion, tell patients what they should report immediately: pain, burning, swelling, leaking, numbness, tingling, difficulty breathing, throat symptoms, chest symptoms, palpitations, severe dizziness, unusual warmth, or any sudden change in how they feel.
Patient education is part of early detection.
Know When the Infusion Is Over—Even When the Bag Is Not
There are moments when the correct clinical decision is not to restart.
Significant hypersensitivity or anaphylaxis, unexplained cardiovascular instability, serious respiratory symptoms, clinically important arrhythmia, severe rate-related toxicity, progressive extravasation injury, compromised circulation, suspected compartment syndrome, significant neurologic change, or any clinical deterioration requiring emergency evaluation should shift the focus away from completing nutrient therapy.
At that point, the therapeutic priority has changed.
The treatment is no longer the infusion.
The treatment is the complication.
After the Event: Do Not Waste the Near Miss
A complication should not end when the patient feels better.
The practice should ask why it happened.
Was the catheter appropriate for the vein?
Was the device adequately stabilized?
Was patency reassessed?
Was the concentration unnecessarily high?
Was the infusion rate appropriate?
Was the patient adequately screened?
Was kidney or cardiovascular function considered?
Was a pump programmed incorrectly?
Did I set the proper gravity rate?
Was the wrong solution connected?
Did staff recognize the event promptly?
Did the emergency equipment work?
Was the correct medication immediately available?
Was the documentation adequate?
Could the same event happen again tomorrow?
The 2024 INS Standards explicitly place complication recognition, intervention, documentation, staff competency, quality improvement, and organizational policies within safe infusion practice. [1] PubMed
Every significant adverse event—and every meaningful near miss—should improve the system.
What Every IV Clinic Should Be Able to Do Before It Opens the Door
A sophisticated IV practice is not defined by the number of formulas on its menu.
It is defined by whether its clinicians can recognize deterioration, respond appropriately, and prevent recurrence.
Before administering infusion therapy, a clinic should have written and practiced procedures for infiltration and extravasation, phlebitis, occlusion, catheter damage or dislodgement, syncope, allergic reactions and anaphylaxis, fluid intolerance, medication- and electrolyte-related reactions, escalation to emergency medical services, documentation, follow-up, and quality review.
Staff should know where emergency equipment is located without looking for it.
Epinephrine should be immediately available.
Oxygen and appropriate delivery equipment should be functional.
An AED should be accessible where required or appropriate to the practice setting.
Blood-pressure and oxygen-saturation monitoring should be readily available.
Agent-specific extravasation information should be immediately accessible.
Emergency medications should be checked for expiration.
Staff should rehearse emergencies before they occur.
And clinicians administering infusion therapy should be trained and competency validated—not merely comfortable.
CDC guidance likewise emphasizes that intravascular catheters should be inserted and maintained by trained personnel who have demonstrated competency, with periodic assessment of knowledge and adherence to safe practices. CDC
Recognition Precedes Rescue
The most important moment in an infusion complication is often not the rescue itself.
It is the moment immediately before it.
The moment someone notices that the vein looks different.
The moment the patient says something feels wrong.
The moment the pump begins behaving differently.
The moment blood return changes.
The moment blood pressure falls.
The moment breathing changes.
The moment a clinician decides not to dismiss the finding.
Expert infusion practice is not the absence of complications.
It is the creation of systems that reduce preventable complications—and clinicians who recognize unavoidable ones early enough to change the outcome.
See the change.
Stop assuming.
Assess the patient.
Protect the vessel.
Identify the mechanism.
Act early.
Escalate when necessary.
Learn from the event.
Because when an IV goes wrong, the first intervention is recognition.
And recognition precedes rescue.
PRACTICE SUPPORT | BUILDING OR STRENGTHENING AN IV INFUSION SERVICE
Safe IV therapy requires more than protocols and products. Practices also need appropriate workflow, equipment, medication and supply systems, emergency preparedness, staff competency, patient screening, documentation, vascular-access practices, and procedures for recognizing and managing complications.
International IV Nutritional Therapy for Professionals (IIVNTP) provides consultation for clinicians and organizations establishing, expanding, or evaluating an IV infusion service. Current IIVNTP offerings include one-day, two-day, and three-day infusion-center consultations, with remote options and selected in-person services. The consultation process includes a needs assessment and may address clinic workflow, safety systems, equipment and supplies, infusion-room setup, policies and procedures, practical implementation, and staff needs. IV Nutritional Therapy
Practitioners may contact IIVNTP at info@ivnutritionaltherapy.com or 541-777-3356, or visit the IIVNTP consultation information page. IV Nutritional TherapyIIVNTP Infusion Center Consultation Information
References
1. Nickel B, Gorski L, Kleidon T, et al. Infusion Therapy Standards of Practice, 9th Edition. J Infus Nurs. 2024;47(1S Suppl 1):S1-S285. doi:10.1097/NAN.
