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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 the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.
A horse length, or simply length, is a unit of measurement for the length of a horse from nose to tail, approximately 8 feet (2.4 m). [1] Use in horse racing.
Thus, a horse that measures 60 inches is 15 hands high (15 × 4 = 60) and a horse halfway between 15 and 16 hands is 15.2 hands, or 62 inches tall (15 × 4 + 2 = 62) [5] [7] Because the subdivision of a hand is a base 4 system, a horse 64 inches high is 16.0 hands high, not 15.4. [2]
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The horse has one of the largest eyes of all land mammals. [28] Eye size in mammals is significantly correlated to maximum running speed as well as to body size, in accordance with Leuckart's law; animals capable of fast locomotion require large eyes. [29] The eye of the horse is set to the side of its skull, consistent with that of a prey ...
A horse show competition where the horses are led, not ridden, and judged on their conformation. [1]: 99 Also called in-hand or breeding classes. hand A measurement of the height of a horse. Originally taken from the size of a grown man's hand but now standardized to 4 inches. The measurement is usually taken from the ground to the withers. If ...
Needles in common medical use range from 7 gauge (the largest) to 34 (the smallest). 21-gauge needles are most commonly used for drawing blood for testing purposes, and 16- or 17-gauge needles are most commonly used for blood donation, as the larger luminal cross-sectional area results in lower fluid shear, reducing harm to red blood cells ...