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2. Birmingham gauge - Wikipedia

   en.wikipedia.org/wiki/Birmingham_gauge

   The Birmingham gauge ranges from 5/0 or 00000, the lowest gauge number corresponding to the largest size of 0.500 inches (12.7 mm), to 36, the highest gauge number corresponding to the smallest size of 0.004 inches (0.10 mm). The increments between gauge sizes are not linear and vary. [2]

3. French catheter scale - Wikipedia

   en.wikipedia.org/wiki/French_catheter_scale

   The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 millimeter, making the relationship: 1 mm = 3 Fr. Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [ 2 ]

4. Combined spinal and epidural anaesthesia - Wikipedia

   en.wikipedia.org/wiki/Combined_spinal_and...

   However, the standard length of a spinal needle (90mm) may be insufficiently long to reach the subarachnoid space through the Tuohy needle. An extra-long needle (e.g., 120 mm) may be required. Alternatively, several manufacturers produce packs containing both a spinal and an epidural needle which are slightly modified to fit together.

5. Spinal anaesthesia - Wikipedia

   en.wikipedia.org/wiki/Spinal_anaesthesia

   The first planned spinal anaesthesia for surgery on a human was administered by August Bier (1861–1949) on 16 August 1898, in Kiel, when he injected 3 ml of 0.5% cocaine solution into a 34-year-old labourer. [14] After using it on six patients, he and his assistant each injected cocaine into the other's spine. They recommended it for ...

6. Spinal needle - Wikipedia

   en.wikipedia.org/?title=Spinal_needle&redirect=no

   This page was last edited on 23 May 2008, at 11:35 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...

7. Surgical suture - Wikipedia

   en.wikipedia.org/wiki/Surgical_suture

   1/2 circle. Subtypes of this needle shape include, from larger to smaller size, CT, CT-1, CT-2 and CT-3. [3] 5/8 circle; compound curve; half curved (also known as ski) half curved at both ends of a straight segment (also known as canoe) The ski and canoe needle design allows curved needles to be straight enough to be used in laparoscopic ...