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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.
Cerebrospinal fluid flowing through a 25 gauge spinal needle during spinal anesthesia. On 16 August 1898, Bier performed the first operation under spinal anesthesia at the Royal Surgical Hospital of the University of Kiel.
In medicine, the Birmingham gauge specifies the outside diameter of hypodermic needles, catheters, cannulae and suture wires. It was originally developed in early 19th-century England for use in wire manufacture, and began appearing in a medical setting in the early 20th century. Another common needle gauge system is the French catheter scale.
The needle-through-needle technique involves the introduction of a Tuohy needle (epidural needle) into the epidural space. The standard technique of loss of resistance to injection may be employed. A long fine spinal needle (25G) is then introduced via the lumen of the epidural needle and through the dura mater, into the subarachnoid space.
Fine-needle aspiration (FNA) is a diagnostic procedure used to investigate lumps or masses. In this technique, a thin (23–25 gauge (0.52 to 0.64 mm outer diameter)), hollow needle is inserted into the mass for sampling of cells that, after being stained , are examined under a microscope ( biopsy ).
70% if a needle between 1.067 mm (0.0420 in) and 1.651 mm (0.0650 in) is used. [2] On the Birmingham gauge, these correspond to the values 27–24G, 22–20G and 19–16G. [2] PDPH is roughly twice as common in lumbar puncture than spinal anaesthesia, almost certainly due to the atraumatic needles used in spinal anaesthesia. [24]
A catheter connected to a subcutaneous reservoir is implanted for permanent access in humans. The reservoir used is most commonly the Ommaya reservoir. A 25-gauge needle is used to puncture the scalp into the reservoir. A few milliliters of CSF are withdrawn before injecting the drug. This technique is typically used for long-term drug ...
Types of epidural needles include: [3] The Crawford Needle; The Tuohy Needle; The Hustead Needle; The Weiss Needle; The Sprotte Spezial Needle; Other Epidural Needles : Other less popular types are the Wagner needle (1957), the Cheng needle(1958), the Crawley needle (1968), the Foldes needle (1973), and the Bell needle (1975)—all variants of the Huber design with a blunted tip of varying ...
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