What technique is used to inject into the epidural space during a caudal epidural?

• A. Blind technique
• B. Hanging drop technique
• C. Central line technique
• D. Needle aspiration technique

Answer: (B)

The hanging drop technique is a well-established method used for injecting anesthetics into the epidural space, specifically during a caudal epidural procedure. This technique relies on the principles of hydrostatics to ensure precise placement of the needle within the epidural space.

When using the hanging drop technique, the clinician will first position the patient appropriately and identify the injection site. A droplet of saline or anesthetic is then placed on the hub of the needle, creating a visible drop. As the needle is advanced into the skin and deeper tissues, the drop is observed. If the needle enters the epidural space, the drop will be drawn into the needle under negative pressure, indicating successful access to the epidural space.

This method is particularly effective because it allows for real-time feedback on the position of the needle relative to the surrounding anatomical structures, helping to avoid complications during the injection process. The use of a visible droplet also aids in confirming the entry into the correct space, making it a preferred technique for clinicians performing caudal epidurals.

Other options presented do not align with the standard practices for this particular procedure. The blind technique lacks real-time indicators for epidural space entry, while the central line technique is unrelated to caudal epidurals,