# Fluid Therapy in the Critically Ill

> Crystalloid choices, fluid responsiveness, the ROSE phases and de-resuscitation in critically ill patients for NEET-SS Critical Care exams.

- Canonical URL: https://prepelephant.com/topics/neet-ss/critical-care-medicine/fluid-therapy-cc
- Exam / course: NEET-SS · Subject: Critical Care Medicine
- Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team
- First published: 2026-10-02
- Last updated: 2026-10-02
- How to cite: "Fluid Therapy in the Critically Ill", PrepElephant, https://prepelephant.com/topics/neet-ss/critical-care-medicine/fluid-therapy-cc

## Direct answer

Balanced crystalloids — Ringer's lactate or Plasma-Lyte — given in boluses only when the patient demonstrates fluid responsiveness, are the default fluid strategy in critical care; 30 mL/kg remains the opening dose in septic shock, after which every additional millilitre is a drug with a titration, an indication and a stopping rule. Hydroxyethyl starches are contraindicated, albumin has narrow specific indications, and positive cumulative fluid balance is treated as a toxic exposure to be reversed once shock resolves.

## What you must remember

- SMART and BaSICS fixed the saline-versus-balanced question: balanced crystalloids modestly reduce major adverse kidney events, so they are the default; saline remains acceptable when chloride-loading is intended, as in hyponatraemia or metabolic alkalosis.
- Starches (HES 130/0.4) increase renal replacement therapy and, in sepsis, mortality (VISEP, 6S, CHEST) — the single most quotable contraindication in fluid therapy.
- SAFE established 4 per cent albumin as equivalent to saline for resuscitation; albumin earns specific roles in septic shock requiring large volumes, cirrhosis with spontaneous bacterial peritonitis (1.5 g/kg then 1 g/kg), and hepatorenal syndrome with terlipressin.
- The ROSE framework: rescue (life-saving boluses), optimisation (responsiveness-guided aliquots), stabilisation (maintenance only), and escalation-to-de-escalation (active fluid removal by diuretics or filtration).
- Maintenance prescription for a stable ICU patient: roughly 25 to 30 mL/kg per day of water, about 1 mmol/kg per day each of sodium and potassium, and 2 to 3 g per kg per day of glucose, with balanced solutions preferred.
- Fluid responsiveness is assessed before each elective bolus by pulse pressure variation, passive leg raise or stroke volume response — never by CVP alone.
- Cumulative positive balance independently associates with worse ARDS, AKI and mortality; CLASSIC and CLOVERS together argue for neither liberal drowning nor reflexive rationing — assess, then decide.

## Four phases, one patient

A 40-year-old with acute severe pancreatitis maps the whole topic. Phase one, rescue: hypotensive with lactate 6 — 30 mL/kg balanced crystalloid in the first hours is non-negotiable. Phase two, optimisation: she stabilises at MAP 68 on low norepinephrine; further 250 to 500 mL aliquots are given only when the passive leg raise shows a stroke volume rise above 10 per cent, and two non-responding trials end the volume chapter for the day. Phase three, stabilisation: the abdomen is the third space of modern textbooks' caution, but the prescription is now maintenance — 25 to 30 mL/kg per day with potassium and glucose — plus replacing measured losses. Phase four, de-escalation: by day five she is 6 litres positive, hypoxic with bilateral infiltrates; furosemide infusion or, if oliguric, ultrafiltration drives the balance negative, and oxygenation improves as EVLW falls. The teaching point is that the question changes at each phase — from "how fast" to "should I at all" to "how do I remove it" — and answering phase-four questions with phase-one instincts is how patients drown.

## Where students slip

Old habits masquerade as knowledge. "Third-space replacement" with litres of saline belongs to an era before trial evidence — fixed backgrounds ignore the glycocalyx and leak. CVP-guided boluses are still written in some answer sheets and remain wrong. Lactate treated as a pure volume order forgets it is also produced aerobically in stressed cells and cleared by the liver. The Indian exam convention adds a practical twist: Ringer's lactate is often blamed for hyperkalaemia in renal failure, yet its potassium (4 mmol/L) is trivial against the acidosis it corrects — knowing that distinction scores. Finally, know what de-resuscitation means: active removal of accumulated fluid in the stabilisation-to-recovery window, a term examiners increasingly expect.

## Frequently asked questions

### Which crystalloid is preferred for initial resuscitation?

A balanced solution — Ringer's lactate or Plasma-Lyte — per SMART and BaSICS; normal saline when deliberate chloride loading is acceptable or intended.

### Why are starches contraindicated?

HES 130/0.4 increases acute kidney injury, renal replacement therapy and, in sepsis, mortality across VISEP, 6S and CHEST.

### When does albumin have a defined role?

Septic shock needing large crystalloid volumes, cirrhosis with spontaneous bacterial peritonitis, hepatorenal syndrome with terlipressin, and symptomatic hypoalbuminaemia is not one of them.

### What are the ROSE phases of fluid therapy?

Rescue, optimisation, stabilisation and de-escalation (with escalation overlapping the first two) — each phase carries a different fluid question and risk.

### How is fluid responsiveness assessed at the bedside?

Pulse pressure or stroke volume variation above about 10 to 13 per cent when valid, otherwise a passive leg raise with a real-time stroke volume or end-tidal CO2 response.

### What is an appropriate maintenance prescription?

About 25 to 30 mL/kg per day of water with 1 mmol/kg per day each of sodium and potassium and 2 to 3 g per kg per day of glucose in a balanced crystalloid.