Is crystalloid preloading useful in spinal anaesthesia in the elderly?

Area of Science:

• Anesthesiology
• Geriatric Medicine
• Surgical Care

Background:

• Spinal anesthesia is commonly used for lower abdominal and limb surgeries in elderly patients.
• Systemic arterial hypotension is a frequent complication of spinal anesthesia, particularly in older individuals.
• Fluid preloading is a common strategy to mitigate hypotension, but its efficacy in this population is debated.

Purpose of the Study:

• To investigate the effect of crystalloid volume preloading on the incidence of hypotension following spinal anesthesia in elderly patients (60 years or older).

Main Methods:

• Sixty ASA grade 1 or 2 patients aged 60+ were randomized into three groups: 16 ml/kg (Group A), 8 ml/kg (Group B), or no fluid preload (Group C) before spinal anesthesia.
• Heart rate, arterial pressure, and anesthetic level were monitored by an independent observer.
• Hypotension was defined as a ≥25% decrease in systolic arterial pressure.

Main Results:

• The overall incidence of systemic arterial hypotension was 27%, with no significant differences among the three groups.
• Hypotension incidence rose to 60% when sensory block reached the T7 dermatome or higher.
• All patients with a block level of T4 or higher required ephedrine for hypotension management.

Conclusions:

• Crystalloid preloading does not appear to affect the incidence of hypotension after spinal anesthesia in fit, elderly patients.
• The height of the sensory block is a significant predictor of hypotension requiring treatment in this patient group.
• Further research may be needed to explore alternative strategies for preventing hypotension in elderly patients undergoing spinal anesthesia with high block levels.