Effect of lateral posture on epidural blockade for surgery

Area of Science:

• Anesthesiology
• Surgical Procedures

Background:

• Lumbar epidural blockade is a common anesthetic technique for lower abdominal surgery.
• Patient positioning during epidural administration can influence anesthetic spread and efficacy.

Purpose of the Study:

• To investigate the effect of patient posture during local anesthetic injection on the onset, spread, and duration of lumbar epidural blockade.
• To determine if positioning the patient on the operative side enhances anesthetic effects.

Main Methods:

• Prospective, double-blind study involving 60 healthy patients undergoing lower abdominal surgery.
• Administration of single-dose lumbar epidural blockade using bupivacaine HCl, lignocaine HCl, or mixtures.
• Patients were positioned laterally only during local anesthetic injection.

Main Results:

• More rapid onset and prolonged sensory and motor blockade were observed on the dependent side.
• Skin temperature changes indicated more pronounced sympathetic blockade on the dependent side.
• Anesthetic effects were consistently greater in dependent dermatomes and myotomes.

Conclusions:

• Patient positioning on the operative side during epidural administration and injection enhances sensory and motor blockade.
• This technique may lead to more efficacious anesthesia and potentially improved surgical outcomes.
• Strategic patient positioning is crucial for optimizing lumbar epidural blockade effectiveness.