Fluid Overload 🌊
Guide to recognising and managing fluid overload in hospital patients: assessment, stopping IV fluids, diuretics, monitoring, and when to escalate for acute pulmonary oedema.
🧠 Approach
- Common triggers: IV fluids continued too long, post-resuscitation, heart failure, AKI/CKD, liver disease.
- Two questions first: is the patient acutely compromised (hypoxic, distressed)? And are IV fluids still running?
- Overload is often iatrogenic. Review the fluid chart before anything else.
📞 What to Ask on the Phone
- SpO₂ and respiratory rate? Short of breath?
- Are IV fluids running? Rate and type?
- Fluid balance over 24 to 48 h? Weight trend?
- Urine output?
- Known heart failure, CKD, or liver disease?
- Ask nurse to slow or pause fluids pending review if concerned.
🚨 Red Flags: Escalate Urgently
- Acute pulmonary oedema: hypoxia, distress, orthopnoea, widespread crackles, pink frothy sputum.
- SpO₂ <92% despite oxygen, or rising oxygen requirement.
- Hypotension with overload: think cardiogenic shock; senior review before diuresing.
- Anuria or severe AKI: diuretics may not work; may need renal input ± dialysis.
🩺 Assessment
- Vitals, NEWS, SpO₂; work of breathing.
- JVP, basal crackles, peripheral and sacral oedema, ascites.
- Fluid chart: cumulative balance, IV fluids prescribed, oral intake.
- Weight trend: 1 kg gain ≈ 1 L retained.
- Urine output trend; catheterise if unable to monitor and acutely unwell.
- Drug chart: IV fluids, NSAIDs, existing diuretics (held? absorbed?).
🔬 Investigations
- U&E and creatinine: baseline before and after diuresis; watch K⁺ and Na⁺.
- CXR: pulmonary oedema, effusions, cardiomegaly.
- BNP/NT-proBNP if new heart failure suspected.
- ABG if hypoxic or distressed.
- ECG: ischaemia or arrhythmia as the precipitant.
- Consider echo (non-urgent) if new heart failure; discuss with team.
💊 Management
- Stop or reduce IV fluids first. Review and cancel standing fluid prescriptions (NICE CG174: stop IV fluids as soon as possible).
- Sit the patient up; oxygen if SpO₂ <94% (or 88 to 92% target in CO₂ retainers).
- Acute pulmonary oedema: IV furosemide (bolus or infusion; higher dose if already on diuretics, per NICE CG187) and escalate early.
- Nitrates are not routine in acute heart failure (NICE CG187): senior decision, mainly for concomitant ischaemia or severe hypertension, with close BP monitoring.
- NIV (CPAP) is not routine either: consider if severe dyspnoea and acidaemia, or failure to respond to medical therapy.
- Avoid routine opiates (NICE CG187).
- Symptomatic overload without acute distress: IV or PO furosemide with senior input; reassess response in 1 to 2 h (urine output, symptoms).
- Fluid restrict (e.g. 1 to 1.5 L/day) and daily weights; document target balance.
- Recheck U&E within 24 h of starting or increasing diuretics; replace K⁺ if needed.
- Treat the precipitant: ischaemia, arrhythmia, missed diuretics, AKI.
📈 Monitoring & Handover
- Strict fluid balance chart and daily weight.
- Clear diuretic plan: dose, route, review time.
- Escalation criteria for nursing staff: SpO₂, RR, urine output thresholds.
- Handover pending U&E and the response check.
📋 When to Refer
- No response to diuretics or worsening hypoxia: senior/registrar review; consider ICU if needing CPAP or ventilatory support.
- Overload with significant AKI or anuria: renal team; may need dialysis.
- New or decompensated heart failure: cardiology input.
- Cirrhosis with ascites driving overload: gastroenterology/hepatology.
Based on
Related NICE guidance
NICENICE CG174 — Intravenous fluid therapy in adults in hospital (updated May 2017)NICENICE CG187 — Acute heart failure: diagnosis and management (updated Nov 2021)
Full guidance on nice.org.uk. BetterCall is not endorsed by NICE.
Note Template
Ready-to-use clinical note structure
🕒 13 / 10 / 2026 — 06:40 ATRP re: fluid overload Patient: [age] [sex] Admission Dx: [reason for admission] PMHx: [heart failure, CKD, liver disease] 🧾 Hx: • Trigger: [IV fluids / post-resus / missed diuretics / cardiac event] • SOB, orthopnoea, leg swelling • Fluid balance 24-48 h: [+__ mL], weight trend: [+__ kg] • IV fluids running: [type/rate — stopped at __] 🩺 Exam: • Vitals: HR __ BP __ RR __ SpO₂ __ (on __) • JVP: [raised/normal], crackles: [bases/widespread/none] • Oedema: [peripheral / sacral / ascites] • Urine output: [__ mL/h] 🔬 Investigations: • U&E: [Na, K, creatinine — baseline vs today] • CXR: [pulmonary oedema / effusions / pending] • BNP / ABG / ECG: [as indicated] 📋 Impression: Fluid overload — [iatrogenic / decompensated HF / renal / hepatic] 📌 Plan: • IV fluids stopped, fluid restriction [__ L/day] • Furosemide [dose/route] — response check at [time] • Strict fluid balance + daily weight • Repeat U&E [time]; replace K⁺ if needed • Escalation: [SpO₂ / RR / UO thresholds for nursing staff] 👤 [Your Name], [Role] IMC: _______
Educational reference only. Medical disclaimer