It is a local anaesthesia which is injected I the spinal cord of the patient, basically in the subarachnoid space. This is accomplished by using a needle which can be up to 9 cm in length. Spinal anaesthesia sometimes is also referred to as spinal analgesia, spinal block and sub-arachnoid block. In case the patient is suffering from severe obesity the length of the needle needs to be increased. For those cases longer needles are already available in hospitals. irrespective of the anaesthetic agent (drug) used, the desired effect is to block the transmission of afferent nerve signals from peripheral nociceptors. Sensory signals from the site are blocked, results in removing the pain. The degree of anaesthesia depends on the amount and concentration of local anaesthetic used and the properties of the axon.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on July, 2014