Area of Science:

• Anesthesiology
• Geriatric Medicine
• Orthopedic Surgery

Background:

• Continuous spinal anesthesia (CSA) offers hemodynamic advantages over general anesthesia for elderly hip fracture repair.
• Despite CSA, hypotension remains a significant clinical challenge in this patient population.

Purpose of the Study:

• To compare the efficacy of hypobaric versus isobaric bupivacaine in maintaining hemodynamic stability during CSA for hip fracture surgery in elderly patients.
• To evaluate the incidence of hypotension and the requirement for vasopressor medication between the two anesthetic preparations.

Main Methods:

• A prospective, randomized, single-blind study involving 110 elderly patients (age > 65) undergoing hip fracture repair.
• Patients received either hypobaric or isobaric bupivacaine via CSA, with repeated doses to achieve T12 sensory blockade.
• Hemodynamic parameters, specifically systolic arterial blood pressure, were monitored to define and quantify hypotension.

Main Results:

• The hypobaric bupivacaine group experienced significantly lower rates of hypotension (53% vs. 73%) and severe hypotension (22% vs. 53%) compared to the isobaric group.
• Ephedrine consumption was markedly reduced in the hypobaric group (1.9 mg vs. 5.6 mg).

Conclusions:

• Hypobaric bupivacaine demonstrates superior hemodynamic preservation compared to isobaric bupivacaine in elderly patients undergoing hip fracture repair with CSA.
• The findings suggest hypobaric bupivacaine as a preferred agent for optimizing hemodynamic stability in this surgical context.