Answer:
To prevent cerebrospinal fluid (CSF) leakage.
Explanation:
In some types of anasthesia the needle pierces all meninges (protective layers of the spine and brain) until it reaches the spinal cord, where the cerebrospinal fluid is located. Cerebrospinal fluid is the fluid that surrounds the brain and spinal cord. It is produced continuously and in large quantities by a set of blood vessels in the brain, this fluid is very important for the body, so when a patient will receive the type of anasthesia that will reach the spinal cord it is necessary that the patient be placed in a specific position to prevent cerebrospinal fluid leakage.
