Fluid Management in Endoscopic Spine Surgery

Primary Recommendation: Crystalloids First

The American Society of Anesthesiologists recommends balanced crystalloids, such as Ringer's lactate or Plasma-Lyte, as the first-line fluid for intraoperative volume replacement in spine surgery patients, due to their equivalent hemodynamic support and lower risk profiles compared to colloids 1, 2, 4
Aim for a mildly positive fluid balance of 1-2 liters by the end of surgery to protect kidney function while avoiding excessive hemodilution, as suggested by the British Journal of Anaesthesia 4
If using 0.9% sodium chloride, limit administration to a maximum of 1-1.5 liters to minimize risk of hyperchloremic acidosis, according to the Critical Care journal 5, 1

The European Society of Anaesthesiology warns that hydroxyethyl starch (HES) solutions are associated with increased risk of acute kidney injury and need for renal replacement therapy, particularly in surgical patients receiving higher doses 1, 2
The FLASH study demonstrated significantly more frequent renal failure in patients receiving HES during major abdominal surgery (relative risk 1.34, p=0.05), as reported in the Anaesthesia journal 1, 2

The American College of Surgeons notes that all synthetic colloids (HES, gelatins, dextrans) impair coagulation and platelet function, which is particularly problematic in spine surgery where even minor bleeding can have serious consequences 5, 1
Higher bleeding risk and increased transfusion requirements have been documented with HES use during major non-cardiovascular surgery, according to the Anaesthesia journal 1, 2

The Critical Care journal suggests that colloids might be considered as a second-line option if crystalloids combined with vasopressors fail to maintain adequate tissue perfusion in the setting of significant ongoing blood loss 5, 6
Albumin offers no benefit over crystalloids in surgical patients and is significantly more expensive without improved outcomes, as stated by the Anaesthesia journal 1, 2

The American Society of Anesthesiologists notes that endoscopic spine surgery typically involves minimal blood loss, making crystalloid-only resuscitation entirely appropriate for most cases 7
Monitor hemoglobin/hematocrit periodically during surgery if substantial blood loss occurs (>800 mL), and transfuse blood products as appropriate rather than relying on colloids, as recommended by the Anesthesiology journal 7