When performing a lumbosacral epidural, at what angle should the spinal needle be inserted?

• A. 90 or 45 degrees
• B. 30 degrees
• C. 180 degrees
• D. 15 degrees

Answer: (A)

When performing a lumbosacral epidural, the spinal needle should ideally be inserted at either a 90-degree or a 45-degree angle. This positioning is crucial because it allows for optimal access to the epidural space, which is located just outside the dura mater surrounding the spinal cord.

Inserting the needle at 90 degrees straight into the intervertebral space can sometimes be more straightforward, especially in larger animals or when the anatomy allows for ease of access. A 45-degree angle may provide a balance between reaching the epidural space effectively while also minimizing the risk of damaging surrounding structures.

Choosing an appropriate angle is essential for ensuring the effectiveness of the anesthesia while also prioritizing the safety of the animal. The other angles, such as 30 degrees, 180 degrees, or 15 degrees, may not provide adequate access or might increase the risk of complications, making them less suitable for achieving a successful epidural block.