Critical Care
Sepsis Fluid Reassessment
After initial crystalloid resuscitation for sepsis-induced hypoperfusion, reassess perfusion, fluid responsiveness, and congestion before each additional bolus. Passive leg raising with stroke-volume or cardiac-output measurement is the most broadly applicable dynamic test; persistent hypotension requires prompt vasopressor support rather than reflexive fluid loading.
First reassessment
When to reassess after the initial fluid bolus
Reassessment determines whether the next intervention should be fluid, vasopressor, or treatment of another shock mechanism.
For sepsis-induced hypoperfusion or septic shock, give initial IV crystalloid resuscitation promptly; current Surviving Sepsis Campaign guidance cited in contemporary reviews recommends at least 30 mL/kg within 3 hours. Reassess immediately after that initial resuscitation and earlier if respiratory status deteriorates, oxygen requirement rises, or hypotension persists. PubMed+2PubMedFluid Resuscitation in Patients Presenting with Sepsis: Current InsightsPubMedEarly Recognition and Initial Management of Sepsis in Adult Patientscdn clinicaltrialsClinicalTrials.gov AMENDED CLINICAL STUDY PROTOCOL Applicable for Sites in France only
At reassessment, separate three questions: is tissue perfusion still abnormal, will preload augmentation increase cardiac output, and is further fluid likely to worsen edema or pulmonary congestion? Persistent hypotension alone does not establish fluid deficit because septic shock combines vasodilation, capillary leak, and variable myocardial dysfunction. PubMed+1PubMedSeptic Shock - StatPearls - NCBI Bookshelfcdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
Repeat bedside examination and basic perfusion measures serially, including urine output, capillary refill time, skin temperature gradients, mottling, lactate, blood pressure, and mental status. These measures are sensitive for hypoperfusion but individually have low specificity; integrate them with a dynamic flow assessment before ordering another bolus. Wolters KluwerWolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical Care
Recheck lactate when the initial value is at least 2 mmol/L to assess the response to resuscitation. PubMedPubMedEarly Recognition and Initial Management of Sepsis in Adult Patients
Treat MAP below 65 mm Hg or systolic blood pressure below 90 mm Hg as an immediate reassessment trigger; evaluate fluid responsiveness while preparing norepinephrine when hypotension is persistent or severe. cdn clinicaltrials+1cdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsiscdn clinicaltrials[PDF] HCFMUSP The Effect of Non-Invasive Hemodynamic Therapy
Actively look for a competing or mixed shock state when cardiac output is low, pulmonary edema is present, or the hemodynamic response to preload is absent. ScienceDirect+2ScienceDirectStroke volume variation compared with pulse pressure variation and cardiac index changes for prediction of fluid responsiveness in mechanically ventilated patients - ScienceDirectPubMedSurviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 2008. - Abstractcdn clinicaltrials[PDF] HCFMUSP The Effect of Non-Invasive Hemodynamic Therapy
Preload testing
Choose a dynamic test before additional fluid
Dynamic tests estimate whether transient preload augmentation increases stroke volume or cardiac output.
Passive leg raising is the preferred reassessment maneuver when a real-time flow measurement is available. It transiently transfers venous blood from the legs to the central circulation without committing the patient to an administered bolus, and it is feasible in patients with or without invasive mechanical ventilation. Measure stroke volume or cardiac output during the maneuver rather than relying on an isolated pretest value. Wolters Kluwer+1Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CareannemergmedIs Passive Leg Raise an Accurate Diagnostic Method for Assessing Fluid Responsiveness in Adults?
Transthoracic echocardiography can provide the required flow readout during passive leg raising. Where ultrasound-based output measurement is unavailable, change in pulse pressure or capillary refill time during passive leg raising has shown useful performance, but these alternatives should be interpreted in the full clinical context. Wolters KluwerWolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical Care
Do not substitute a static central venous pressure, pulmonary capillary wedge pressure, left-ventricular end-diastolic area, MAP, or heart rate for a dynamic fluid-responsiveness assessment. These static indices have limited ability to distinguish fluid responders from nonresponders. ScienceDirect+1ScienceDirectStroke volume variation compared with pulse pressure variation and cardiac index changes for prediction of fluid responsiveness in mechanically ventilated patients - ScienceDirectPubMedFluid Management in Sepsis - PMC
Avoid or qualify passive leg raising in abdominal hypertension, intracranial hypertension, traumatic hip fracture, or lower-extremity fractures. Wolters KluwerWolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical Care
Pulse-pressure variation and stroke-volume variation are most applicable during controlled positive-pressure ventilation with sedation, sinus rhythm, and tidal volumes of at least 8 mL/kg; atrial fibrillation, ectopy, spontaneous respiratory effort, and low tidal-volume ventilation reduce reliability. ScienceDirect+1ScienceDirectMonitoring volume and fluid responsiveness: From static to dynamic indicators - ScienceDirectScienceDirectStroke volume variation compared with pulse pressure variation and cardiac index changes for prediction of fluid responsiveness in mechanically ventilated patients - ScienceDirect
Inferior vena cava respiratory variation has the same important ventilatory and rhythm-related constraints and should not be interpreted as a stand-alone measure of intravascular volume. ScienceDirect+1ScienceDirectMonitoring volume and fluid responsiveness: From static to dynamic indicators - ScienceDirectScienceDirectStroke volume variation compared with pulse pressure variation and cardiac index changes for prediction of fluid responsiveness in mechanically ventilated patients - ScienceDirect
A mini-fluid challenge is an alternative dynamic approach when passive leg raising cannot be performed, provided stroke volume or cardiac output can be measured serially. Wolters KluwerWolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical Care
Interpret a positive test correctly
Fluid responsiveness means cardiac output or stroke volume is likely to rise after fluid administration; it does not prove that the patient needs fluid, that organ perfusion will improve, or that outcome will improve. A meta-analysis of four sepsis trials totaling 365 patients found no mortality reduction when fluid resuscitation was managed by fluid responsiveness compared with usual care. PubMed+1PubMedFluid Management in Sepsis - PMCjournal chestnetOutcomes Using Fluid Responsiveness to Manage Fluid Resuscitation - CHEST
Use a positive passive leg raise or other valid dynamic test as permission for a cautious, reassessed crystalloid bolus only when ongoing hypoperfusion is present and the expected benefit exceeds congestion risk. A negative test should redirect treatment toward vasopressors for vasoplegia, echocardiographic assessment for low-output states, and correction of other causes of hypoperfusion. Wolters Kluwer+2Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CarePubMedFluid Management in Sepsis - PMCcdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
Fluid decisions
Give further fluid only as a monitored intervention
Each bolus should have a defined physiologic target and a predefined stop rule.
Use isotonic crystalloid as the initial resuscitation fluid. Current guidance allows buffered crystalloid or saline; reviews cite data associating buffered solutions with fewer major adverse kidney events through 30 days or hospital discharge in critically ill patients than saline. PubMed+1PubMedThe Surviving Sepsis Campaign: Fluid Resuscitation and ... - PMCPubMedThe surviving sepsis campaign: fluid resuscitation and vasopressor ...
After initial resuscitation, administer additional fluid as discrete, reassessed boluses rather than an unexamined cumulative volume. In the CLOVERS protocol, rescue crystalloid was administered in 500-mL boluses for severe or refractory hypotension, rising lactate above 4 mmol/L after at least 2 hours of therapy, persistent sinus tachycardia above 130/min for more than 15 minutes, or extreme volume depletion by hemodynamic monitoring. These trial criteria are pragmatic triggers, not universal requirements. cdn clinicaltrialscdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
Stop or slow fluids when preload augmentation fails to improve flow, filling pressures rise without improved tissue perfusion, or clinical volume overload develops. The principal tradeoff is that crystalloid may transiently increase intravascular volume while worsening extravascular edema in the lungs and other organs. PubMed+2PubMedFluid Management in Sepsis - PMCPubMedSurviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 2008. - Abstractcdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
Consider albumin only when substantial crystalloid volumes are required; avoid synthetic starches for sepsis resuscitation. cdn clinicaltrials+1cdn clinicaltrials[PDF] Effects of restricting intravenous fluids vs. standard care fluidcdn clinicaltrialsClinicalTrials.gov AMENDED CLINICAL STUDY PROTOCOL Applicable for Sites in France only
Do not treat a positive dynamic test in isolation: require a concurrent resuscitation target such as persistent hypotension, abnormal peripheral perfusion, oliguria, or an unfavorable lactate trend. Wolters Kluwer+2Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CarePubMedFluid Management in Sepsis - PMCPubMedEarly Recognition and Initial Management of Sepsis in Adult Patients
When the patient has severely reduced cardiac function, end-stage renal disease, or evidence of fluid overload, individualize the initial and subsequent fluid plan and prioritize frequent reassessment. CDCCDCHospital Sepsis Program Core Elements - CDC
| Finding after preload test or bolus | Meaning | Action |
|---|---|---|
| Improved stroke volume or cardiac output and persistent hypoperfusion without congestion. Wolters Kluwer+1Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CareannemergmedIs Passive Leg Raise an Accurate Diagnostic Method for Assessing Fluid Responsiveness in Adults? | Fluid responsiveness with a remaining perfusion target. | Consider another measured crystalloid bolus, then repeat perfusion and flow assessment. |
| No increase in stroke volume or cardiac output with passive leg raise or fluid. Wolters Kluwer+1Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CarePubMedFluid Management in Sepsis - PMC | Patient is unlikely to benefit hemodynamically from further preload. | Stop routine fluids; assess vascular tone and cardiac function. |
| Rising filling pressures without improved tissue perfusion. PubMedPubMedSurviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 2008. - Abstract | Further fluid is unlikely to restore effective perfusion. | Reduce or stop infusion; use alternative hemodynamic support. |
| New or worsening fluid overload. CDC+1CDCHospital Sepsis Program Core Elements - CDCcdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis | Extravascular fluid accumulation may outweigh any intravascular benefit. | Stop additional boluses and reassess respiratory and cardiac status. |
Persistent hypotension
Escalate to norepinephrine when pressure remains inadequate
Persistent hypotension after initial fluid is a vasopressor decision, not an automatic indication for more volume.
For MAP below 65 mm Hg or SBP below 90 mm Hg after initial resuscitation, begin norepinephrine and titrate to restore a MAP of at least 65 mm Hg. The CLOVERS protocol targeted MAP from 65 to 75 mm Hg, and early norepinephrine could be administered through a large peripheral IV catheter when central access was not yet available. cdn clinicaltrials+1cdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsiscdn clinicaltrials[PDF] HCFMUSP The Effect of Non-Invasive Hemodynamic Therapy
Use norepinephrine concurrently with dynamic reassessment rather than waiting for an arbitrary fluid volume when hypotension is profound or refractory. Trial protocols permitted rescue fluid for MAP below 50 mm Hg, SBP below 70 mm Hg, or MAP below 65 mm Hg despite norepinephrine at least 20 mcg/min or 0.25 mcg/kg/min in an 80-kg adult; these thresholds identify severe instability requiring immediate reassessment rather than a mandate to continue fluid. cdn clinicaltrialscdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
If hypotension persists despite fluid and vasopressor therapy, reassess for low cardiac output and mixed shock. In guideline summaries, dobutamine is reserved for low cardiac output persisting despite fluid resuscitation in the setting of combined inotropic and vasopressor support; echocardiographic assessment should guide this branch rather than empirical inotrope use. PubMed+1PubMedSurviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 2008. - Abstractcdn clinicaltrials[PDF] HCFMUSP The Effect of Non-Invasive Hemodynamic Therapy
Do not use dopamine routinely; guideline summaries restrict it to highly selected circumstances. PubMedPubMedSurviving sepsis campaign: international guidelines for management of severe sepsis and septic shock: 2012. - Abstract
Vasopressin at 0.03 units/min may be added to norepinephrine to raise MAP or reduce norepinephrine dose, but it should not be the initial vasopressor. PubMedPubMedSurviving sepsis campaign: international guidelines for management of severe sepsis and septic shock: 2012. - Abstract
Continue source control and empiric antimicrobial treatment in parallel; hemodynamic normalization without infection control is not adequate sepsis management. PubMed+2PubMedSurviving Sepsis Campaign guidelines for management of severe sepsis and septic shock. - AbstractPubMedSurviving sepsis campaign: international guidelines for management of severe sepsis and septic shock: 2012. - AbstractPubMedSurviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 2008. - Abstract
Ongoing management
Repeat reassessment as physiology changes
Fluid responsiveness and perfusion targets change over minutes to hours during sepsis treatment.
Repeat the same objective measurements after every clinically meaningful intervention: fluid bolus, vasopressor escalation, initiation of mechanical ventilation, or abrupt respiratory deterioration. Serial physical examination and basic observations identify evolving hypoperfusion, while repeated dynamic testing limits unnecessary fluid exposure as preload responsiveness changes. Wolters Kluwer+1Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CarePubMedFluid Management in Sepsis - PMC
Trend lactate rather than treating a single value as a fluid prescription. Recheck lactate when it is initially at least 2 mmol/L, and interpret an unfavorable trend alongside MAP, peripheral perfusion, urine output, and measured flow. A lactate value above 4 mmol/L that is rising after at least 2 hours of therapy was used as a rescue-fluid trigger in CLOVERS, but it should prompt reassessment of source control, oxygen delivery, vasopressor adequacy, and low-output states as well. PubMed+1PubMedEarly Recognition and Initial Management of Sepsis in Adult Patientscdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
Once shock resolves, transition from resuscitation to avoidance of iatrogenic fluid accumulation. Excess resuscitation fluid commonly requires subsequent diuresis after shock resolution, reinforcing the need to stop fluids as soon as perfusion targets are met or further preload no longer improves flow. cdn clinicaltrialscdn clinicaltrials[PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis
Document the test used to assess fluid responsiveness, the measured response, the perfusion target, and the reason for each additional bolus.
Reassess before giving fluid for oliguria alone; urine output may reflect kidney injury, venous congestion, vasopressor effects, or persistent systemic hypoperfusion rather than correctable hypovolemia. Wolters Kluwer+1Wolters KluwerHow to monitor cardiovascular function in... : Current Opinion in Critical CarePubMedFluid Management in Sepsis - PMC
When a patient no longer has an active perfusion deficit, do not continue maintenance resuscitation boluses solely because an earlier dynamic test was positive. PubMed+1PubMedFluid Management in Sepsis - PMCjournal chestnetOutcomes Using Fluid Responsiveness to Manage Fluid Resuscitation - CHEST
References
- Evaluation of the fluid responsiveness in patients with septic shock by ultrasound plus the passive leg raising test - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- Monitoring volume and fluid responsiveness: From static to dynamic indicators - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- Analysis of the association between hemodynamic parameters... : Medicine — journals.lww.com · journals.lww.com
- Stroke volume variation compared with pulse pressure variation and cardiac index changes for prediction of fluid responsiveness in mechanically ventilated patients - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- Comparative Analysis of the Collapsibility Index and Distensibility Index of the Inferior Vena Cava Through Echocardiography with Pulse Pressure Variation That Predicts Fluid Responsiveness in Surgical Patients: An Observational Controlled Trial - ScienceDirect — www.sciencedirect.com · www.sciencedirect.com
- How to monitor cardiovascular function in... : Current Opinion in Critical Care — journals.lww.com · journals.lww.com
- Why Has Biomarker-Guided Fluid Resuscitation for... : Critical Care Explorations — journals.lww.com · journals.lww.com
- The Surviving Sepsis Campaign: Fluid Resuscitation and ... - PMC — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- The surviving sepsis campaign: fluid resuscitation and vasopressor ... — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Fluid Resuscitation in Patients Presenting with Sepsis: Current Insights — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Fluid Management in Sepsis - PMC — pmc.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov
- Surviving Sepsis Campaign guidelines for management of severe sepsis and septic shock. - Abstract — pubmed.ncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov
- Surviving sepsis campaign: international guidelines for management of severe sepsis and septic shock: 2012. - Abstract — pubmed.ncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov
- Surviving Sepsis Campaign: international guidelines for management of severe sepsis and septic shock: 2008. - Abstract — pubmed.ncbi.nlm.nih.gov · pubmed.ncbi.nlm.nih.gov
- Early Recognition and Initial Management of Sepsis in Adult Patients — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Septic Shock - StatPearls - NCBI Bookshelf — www.ncbi.nlm.nih.gov · www.ncbi.nlm.nih.gov
- Hospital Sepsis Program Core Elements - CDC — www.cdc.gov · www.cdc.gov
- Is Passive Leg Raise an Accurate Diagnostic Method for Assessing Fluid Responsiveness in Adults? — www.annemergmed.com · www.annemergmed.com
- Outcomes Using Fluid Responsiveness to Manage Fluid Resuscitation - CHEST — journal.chestnet.org · journal.chestnet.org
- [PDF] Crystalloid Liberal or Vasopressors Early Resuscitation in Sepsis — cdn.clinicaltrials.gov · cdn.clinicaltrials.gov
- [PDF] HCFMUSP The Effect of Non-Invasive Hemodynamic Therapy — cdn.clinicaltrials.gov · cdn.clinicaltrials.gov
- [PDF] Effects of restricting intravenous fluids vs. standard care fluid — cdn.clinicaltrials.gov · cdn.clinicaltrials.gov
- Fluid resuscitation management in patients with burns: update — www.bjanaesthesia.org · www.bjanaesthesia.org
- ClinicalTrials.gov AMENDED CLINICAL STUDY PROTOCOL Applicable for Sites in France only — cdn.clinicaltrials.gov · cdn.clinicaltrials.gov