Definition of Foreign Direct Investment Foreign direct investment (FDI) is an investment in a business by an investor from another country for which the foreign investor has control over the company purchased.
Spinal anaesthesia. Spinal anaesthesia (or spinal anesthesia), also called spinal block, subarachnoid block, intradural block and intrathecal block, is a form of regional anaesthesia involving the injection of a local anaesthetic into the subarachnoid space, generally through a fine needle, usually 9 cm (3.5 in) long.
The three types of regional anesthesia used most frequently in joint replacement surgery are spinal blocks, epidural blocks and peripheral nerve blocks. 1  Spinal Block. In a spinal block, the anesthesia is injected into the fluid surrounding the spinal cord in the lower part of your back. 2  Epidural Block.