<P> Spinal anaesthesia is a technique whereby a local anaesthetic drug is injected into the cerebrospinal fluid . This technique has some similarity to epidural anaesthesia, and lay people often confuse the two techniques . Important differences include: </P> <Ul> <Li> To achieve epidural analgesia or anaesthesia, a larger dose of drug is typically necessary than with spinal analgesia or anaesthesia . </Li> <Li> The onset of analgesia is slower with epidural analgesia or anaesthesia than with spinal analgesia or anaesthesia, which also confers a more gradual decrease in blood pressure . </Li> <Li> An epidural injection may be performed anywhere along the vertebral column (cervical, thoracic, lumbar, or sacral), while spinal injections are more often performed below the second lumbar vertebral body to avoid piercing and consequently damaging the spinal cord . </Li> <Li> It is easier to achieve segmental analgesia or anaesthesia using the epidural route than using the spinal route . </Li> <Li> An indwelling catheter is more commonly placed in the setting of epidural analgesia or anaesthesia than with spinal analgesia or anaesthesia . </Li> <Li> Epidural medication administration can be continued post-operatively (and re-dosed intraoperatively) via a catheter, while spinal anesthesia is generally a single shot injection . </Li> </Ul> <Li> To achieve epidural analgesia or anaesthesia, a larger dose of drug is typically necessary than with spinal analgesia or anaesthesia . </Li> <Li> The onset of analgesia is slower with epidural analgesia or anaesthesia than with spinal analgesia or anaesthesia, which also confers a more gradual decrease in blood pressure . </Li>

Can a nurse administer a bolus dose of medication through an epidural catheter