Dialysis complication
A streamlined, differential-led presentation for rapid clinical review.
Twenty-second review
- Dialysis complications arise from rapid fluid or electrolyte shifts, hypotension, bleeding, access failure, infection, or missed clearance of potassium, acid, and volume.
- Chest pain, dysrhythmia, severe dyspnea, shock, access hemorrhage, fever, weakness with ECG change, or missed dialysis with overload is high risk.
- Keep hypoglycemia or medication accumulation in the differential; overlapping or concurrent illness remains possible.
- For dialysis complication, trends and combinations of findings are more informative than one isolated vital sign.
Compare the clinical patterns
The repeated material is grouped inside each possibility. Open only the condition you need.
HyperkalemiaTime-sensitive high-risk possibility
HPI
Clarify dialysis type and schedule; last completed session; access-site concern.
Signs & symptoms
ECG change, dyspnea, fever, bleeding, or instability.
Focused exam
Assess hydration, edema, lung sounds, bladder or flank tenderness, urine appearance, and dialysis access when relevant; Obtain a 12-lead ECG when electrolyte disturbance is plausible.
Brief pathophysiology
Hyperkalemia may cause dialysis complication through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Vital signs are nonspecific in electrolyte or dialysis emergencies. Rhythm/ECG and the patient’s fluid status are essential; do not infer potassium level from vital signs.
Heart rate (bpm)
Rate / rhythm may changeBradycardia or tachyarrhythmia may occur, but ECG findings are more informative.
Blood pressure (mmHg)
High or lowVolume overload, dehydration, and dialysis timing can move pressure in either direction.
Respiratory rate (breaths/min)
May riseTachypnea may reflect acidosis or pulmonary edema.
Oxygen saturation (SpO₂)
May fallLow saturation supports pulmonary edema or another respiratory complication.
Front-load in the triage report
- Hyperkalemia: ECG change, dyspnea, fever, bleeding, or instability.
- Dialysis type and schedule?
- Last completed session?
Pulmonary edemaTime-sensitive high-risk possibility
HPI
Clarify last completed session; access-site concern; dyspnea, chest pain or weakness.
Signs & symptoms
ECG change, dyspnea, fever, bleeding, or instability.
Focused exam
Obtain a 12-lead ECG when electrolyte disturbance is plausible; Assess access for bleeding or infection, last dialysis, target and removed weight, residual urine, edema, lungs, rhythm, and medications.
Brief pathophysiology
Pulmonary edema may cause dialysis complication through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Acute heart failure usually presents as respiratory distress with impaired oxygenation; blood pressure may be high, normal, or low and materially changes management and risk.
Respiratory rate (breaths/min)
Usually risesTachypnea and increased work of breathing are common.
Oxygen saturation (SpO₂)
May fallPulmonary edema can impair gas exchange.
Blood pressure (mmHg)
High, normal, or lowHypertension is common, while hypotension suggests poor forward flow or cardiogenic shock.
Heart rate (bpm)
Often risesTachycardia is common but rate-limiting drugs or conduction disease may blunt it.
Front-load in the triage report
- Pulmonary edema: ECG change, dyspnea, fever, bleeding, or instability.
- Last completed session?
- Access-site concern?
SepsisTime-sensitive high-risk possibility
HPI
Clarify access-site concern; dyspnea, chest pain or weakness; weight or fluid change.
Signs & symptoms
ECG change, dyspnea, fever, bleeding, or instability.
Focused exam
Obtain a 12-lead ECG when electrolyte disturbance is plausible; Assess access for bleeding or infection, last dialysis, target and removed weight, residual urine, edema, lungs, rhythm, and medications.
Brief pathophysiology
Sepsis may cause dialysis complication through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
No single vital sign diagnoses sepsis. New tachypnea, abnormal temperature, tachycardia, or falling pressure—especially with altered mentation or poor perfusion—supports organ dysfunction and urgency.
Respiratory rate (breaths/min)
May rise earlyTachypnea is included in NEWS2 and can precede overt hypotension.
Temperature (°C)
High or lowAbsence of fever does not exclude sepsis; hypothermia is concerning.
Heart rate (bpm)
Often risesTachycardia is common but may be blunted by age or medication.
Blood pressure (mmHg)
May fallRelative hypotension and trend matter; profound hypotension can be late.
Front-load in the triage report
- Sepsis: ECG change, dyspnea, fever, bleeding, or instability.
- Access-site concern?
- Dyspnea, chest pain or weakness?
Access hemorrhageTime-sensitive high-risk possibility
HPI
Clarify dyspnea, chest pain or weakness; weight or fluid change; renal medications and restrictions.
Signs & symptoms
ECG change, dyspnea, fever, bleeding, or instability.
Focused exam
Obtain a 12-lead ECG when electrolyte disturbance is plausible; Assess access for bleeding or infection, last dialysis, target and removed weight, residual urine, edema, lungs, rhythm, and medications.
Brief pathophysiology
Access hemorrhage may cause dialysis complication through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Hemorrhage is a trend diagnosis: tachycardia and narrowing pulse pressure may precede hypotension. Age, pregnancy, medications, and pacing can blunt expected responses.
Heart rate (bpm)
Often risesTachycardia is a common compensatory response but may be absent.
Pulse pressure (mmHg)
May narrowNarrowing pulse pressure can reflect reduced stroke volume.
Blood pressure (mmHg)
May fall lateA normal pressure does not exclude significant compensated hemorrhage.
MAP (mmHg)
May fallA falling trend supports worsening perfusion; interpret with mental status and skin signs.
Front-load in the triage report
- Access hemorrhage: ECG change, dyspnea, fever, bleeding, or instability.
- Dyspnea, chest pain or weakness?
- Weight or fluid change?
Post-dialysis hypotensionCommon presentation pattern
HPI
Clarify dialysis type and schedule; last completed session; access-site concern.
Signs & symptoms
Recent fluid removal with volume depletion may fit.
Focused exam
Assess hydration, edema, lung sounds, bladder or flank tenderness, urine appearance, and dialysis access when relevant; Obtain a 12-lead ECG when electrolyte disturbance is plausible.
Brief pathophysiology
Post-dialysis hypotension may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.
What the trend may show
Vital signs are nonspecific in electrolyte or dialysis emergencies. Rhythm/ECG and the patient’s fluid status are essential; do not infer potassium level from vital signs.
Heart rate (bpm)
Rate / rhythm may changeBradycardia or tachyarrhythmia may occur, but ECG findings are more informative.
Blood pressure (mmHg)
High or lowVolume overload, dehydration, and dialysis timing can move pressure in either direction.
Respiratory rate (breaths/min)
May riseTachypnea may reflect acidosis or pulmonary edema.
Oxygen saturation (SpO₂)
May fallLow saturation supports pulmonary edema or another respiratory complication.
Front-load in the triage report
- Recent fluid removal with volume depletion may fit.
- Dialysis type and schedule?
- Last completed session?
CrampingCommon presentation pattern
HPI
Clarify last completed session; access-site concern; dyspnea, chest pain or weakness.
Signs & symptoms
Recent fluid removal with volume depletion may fit.
Focused exam
Obtain a 12-lead ECG when electrolyte disturbance is plausible; Assess access for bleeding or infection, last dialysis, target and removed weight, residual urine, edema, lungs, rhythm, and medications.
Brief pathophysiology
Cramping may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.
What the trend may show
Vital signs are nonspecific in electrolyte or dialysis emergencies. Rhythm/ECG and the patient’s fluid status are essential; do not infer potassium level from vital signs.
Heart rate (bpm)
Rate / rhythm may changeBradycardia or tachyarrhythmia may occur, but ECG findings are more informative.
Blood pressure (mmHg)
High or lowVolume overload, dehydration, and dialysis timing can move pressure in either direction.
Respiratory rate (breaths/min)
May riseTachypnea may reflect acidosis or pulmonary edema.
Oxygen saturation (SpO₂)
May fallLow saturation supports pulmonary edema or another respiratory complication.
Front-load in the triage report
- Recent fluid removal with volume depletion may fit.
- Last completed session?
- Access-site concern?
HypoglycemiaImportant alternative presentation
HPI
Clarify dialysis type and schedule; last completed session; access-site concern.
Signs & symptoms
Renal clearance changes can produce overlapping symptoms.
Focused exam
Assess hydration, edema, lung sounds, bladder or flank tenderness, urine appearance, and dialysis access when relevant; Obtain a 12-lead ECG when electrolyte disturbance is plausible.
Brief pathophysiology
Hypoglycemia can resemble dialysis complication through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Confirm low capillary glucose and reassess after treatment. Adrenergic signs may be absent in recurrent hypoglycemia or blunted by medications.
Blood glucose (mmol/L)
< 4.0 mmol/LBCEHS defines hypoglycemia as blood glucose below 4.0 mmol/L.
Heart rate (bpm)
May riseAdrenergic activation commonly produces tachycardia, but this is not universal.
Blood pressure (mmHg)
Often preservedBlood pressure is not a reliable discriminator; hypotension suggests another or additional process.
Temperature (°C)
May fallHypothermia can accompany prolonged or severe hypoglycemia.
Front-load in the triage report
- Renal clearance changes can produce overlapping symptoms.
- Dialysis type and schedule?
- Last completed session?
Medication accumulationImportant alternative presentation
HPI
Clarify last completed session; access-site concern; dyspnea, chest pain or weakness.
Signs & symptoms
Renal clearance changes can produce overlapping symptoms.
Focused exam
Obtain a 12-lead ECG when electrolyte disturbance is plausible; Assess access for bleeding or infection, last dialysis, target and removed weight, residual urine, edema, lungs, rhythm, and medications.
Brief pathophysiology
Medication accumulation can resemble dialysis complication through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Vital signs are nonspecific in electrolyte or dialysis emergencies. Rhythm/ECG and the patient’s fluid status are essential; do not infer potassium level from vital signs.
Heart rate (bpm)
Rate / rhythm may changeBradycardia or tachyarrhythmia may occur, but ECG findings are more informative.
Blood pressure (mmHg)
High or lowVolume overload, dehydration, and dialysis timing can move pressure in either direction.
Respiratory rate (breaths/min)
May riseTachypnea may reflect acidosis or pulmonary edema.
Oxygen saturation (SpO₂)
May fallLow saturation supports pulmonary edema or another respiratory complication.
Front-load in the triage report
- Renal clearance changes can produce overlapping symptoms.
- Last completed session?
- Access-site concern?
Findings that should escalate concern
- Pulmonary edema
- Hyperkalemia concern
- Access hemorrhage
- Shock
- Chest pain, dysrhythmia, severe dyspnea, shock, access hemorrhage, fever, weakness with ECG change, or missed dialysis with overload is high risk.
- Hyperkalemia, pulmonary edema, sepsis, or access hemorrhage: ECG change, dyspnea, fever, bleeding, or instability.
Medication recognition
Continue the clinical pathway
Clinical and academic sources
Curated clinical guidance and peer-reviewed evidence supporting this presentation. Current BCEHS guidance, medical direction, and local policy remain authoritative for practice.
BCEHS Handbook — specific CPGs
Supporting clinical and academic evidence
- CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians
Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.
- Acute kidney injury: prevention, detection and managementNational Institute for Health and Care Excellence
Clinical guidance for recognizing renal risk, oliguria, obstruction, electrolyte complications, and deterioration.
- Arteriovenous Access for Hemodialysis: A ReviewJAMA · 2024
Dialysis-access assessment, thrombosis, infection, hemorrhage, and access preservation.