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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]
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 ]
It is estimated that anywhere from nearly 3.5 to 10% of the world's population may have a phobia of needles (trypanophobia), [25] and it is much more common in children, ages 5–17. Topical anesthetics can be used to desensitize the area where the injection will take place to reduce pain and discomfort. [ 26 ]
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 ...
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 ...
While the standard needle size for vaccination is 1 inch, it's recommended that women over 200 lbs. and men over 260 lbs. get shots with 1.5-inch needles. (Getty Images) (Nicolae Toma / 500px via ...
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