No, sterile water should NOT be used as an intravenous fluid for surgery
Sterile water is not an appropriate intravenous fluid for intra-operative use and is not mentioned among recommended fluids in current perioperative guidelines. The appropriate choices for surgical IV fluids are crystalloids (either balanced solutions or 0.9% saline) or colloids (albumin) depending on the clinical scenario 1, 2.
Why Sterile Water is Inappropriate
Sterile water is profoundly hypotonic (osmolarity of 0 mOsm/L) and would cause:
- Severe hemolysis when administered intravenously
- Cellular swelling and lysis due to extreme osmotic gradient
- Life-threatening complications including acute kidney injury, hemoglobinuria, and cardiovascular collapse
The only documented use of intravenous sterile water is as an off-label treatment for severe hypernatremia when administered via central line in very specific circumstances, which is entirely different from routine surgical fluid management 3.
Recommended Intraoperative Fluids
First-Line: Balanced Crystalloid Solutions
The 2024 POQI guidelines strongly recommend buffered crystalloid solutions in the absence of hypochloremia 2. These include:
- Plasma-Lyte® (osmolarity 295 mOsm/L)
- Ringer's lactate (osmolarity 277 mOsm/L)
- Isofundine® (osmolarity 309 mOsm/L)
These solutions have ionic compositions closer to plasma and avoid the hyperchloremic metabolic acidosis associated with 0.9% saline 1.
Alternative: 0.9% Saline
Normal saline (osmolarity 308 mOsm/L) is acceptable but should be reserved for:
- Alkalotic patients
- Hyponatremic patients
- Traumatic brain injury (first-line in this specific population) 2
Colloids (Limited Indications)
- Albumin: Not recommended routinely; avoid in neurosurgical and traumatic brain injury patients 2
- Synthetic colloids (HES): Not recommended due to renal toxicity concerns 2
Intraoperative Fluid Strategy
Aim for 1-2 L positive balance by end of surgery for most major procedures 2. The approach varies by surgical complexity:
- Minor surgery: Fluid balance approach
- Intermediate surgery: Outcome-oriented approach
- Major surgery: Goal-directed therapy approach 4
Critical Pitfalls to Avoid
- Never use hypotonic solutions (including sterile water) for volume resuscitation—they distribute into cells causing edema
- Avoid excessive crystalloid (>3 L) without considering colloid support in major hemorrhage 4
- In neurosurgery: Avoid hypotonic solutions entirely; they worsen cerebral edema 2
- Avoid positive fluid balance in first 24 hours after lung resection surgery 2
The evidence clearly establishes that appropriate surgical IV fluids must be isotonic or near-isotonic crystalloids, with sterile water having no role in routine perioperative fluid management.