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Spinal anaesthesia (or spinal anesthesia), also called spinal block, subarachnoid block, intradural block and intrathecal block, [1] is a form of neuraxial regional anaesthesia involving the injection of a local anaesthetic or opioid into the subarachnoid space, generally through a fine needle, usually 9 cm (3.5 in) long.
Combined spinal and epidural anaesthesia in labouring women is associated with more pruritus if fentanyl (25 μg) is given intrathecally, than low-dose epidural analgesia. However, no difference has been found in the incidence of post dural puncture headache , requirement for epidural blood patch or maternal hypotension.
For epidural anesthesia an anesthetic agent is injected into the space just outside the thecal sac and diffuses through the dura to the nerve roots where they exit the thecal sac. [ 4 ] [ 5 ] For spinal anaesthesia in general, an injection can be given intrathecally into the subarachnoid space, or into the spinal canal .
Neuraxial blockade is local anaesthesia placed around the nerves of the central nervous system, such as spinal anaesthesia, caudal anaesthesia, epidural anaesthesia, and combined spinal and epidural anaesthesia. [1] [2] The technique is used in surgery, obstetrics, and for postoperative and chronic pain relief. [3]
Anesthesia is a combination of the endpoints (discussed above) that are reached by drugs acting on different but overlapping sites in the central nervous system. General anesthesia (as opposed to sedation or regional anesthesia) has three main goals: lack of movement , unconsciousness, and blunting of the stress response. In the early days of ...
Anesthesia: General anesthetics during surgery may cause bladder atony by acting as a smooth muscle relaxant. [6] General anesthetics can directly interfere with autonomic regulation of detrusor tone and predispose people to bladder overdistention and subsequent retention. [6] Spinal anesthesia results in a blockade of the micturition reflex. [6]
General anaesthesia (UK) or general anesthesia (US) is a method of medically inducing loss of consciousness that renders a patient unarousable even with painful stimuli. [5] This effect is achieved by administering either intravenous or inhalational general anaesthetic medications, which often act in combination with an analgesic and ...
Medical intervention Epidural administration A freshly inserted lumbar epidural catheter. The site has been prepared with tincture of iodine, and the dressing has not yet been applied. Depth markings may be seen along the shaft of the catheter. ICD-9-CM 03.90 MeSH D000767 OPS-301 code 8-910 [edit on Wikidata] Epidural administration (from Ancient Greek ἐπί, "upon" + dura mater) is a method ...