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A coil of catgut cello string. Catgut (also known as gut) is a type of cord [1] that is prepared from the natural fiber found in the walls of animal intestines. [2] Catgut makers usually use sheep or goat intestines, but occasionally use the intestines of cattle, [3] hogs, horses, mules, or donkeys. [4] Despite the name, catgut is not made from ...
Catgut suture is straw-colored, and is available in sizes USP 6-0 (1 metric) to USP 3 (7 metric). Although the name implies the usage of guts of cats, there is no record of feline guts being used for this purpose. The word catgut is derived from the term kitgut or kitstring (the string used on a kit, or fiddle).
He pioneered the use of catgut for internal stitches, and his surgical instruments are still used today to treat people. He was the first physician to identify the hereditary nature of haemophilia and describe an abdominal pregnancy , a subtype of ectopic pregnancy that in those days was a fatal affliction, and was first to discover the root ...
Today, most sutures are made of synthetic polymer fibers. Silk and, rarely, gut sutures are the only materials still in use from ancient times. In fact, gut sutures have been banned in Europe and Japan owing to concerns regarding bovine spongiform encephalopathy. Silk suture is still used today, mainly to secure surgical drains. [31]
Test preparation (abbreviated test prep) or exam preparation is an educational course, tutoring service, educational material, or a learning tool designed to increase students' performance on standardized tests.
The Cattell–Horn–Carroll theory factors that this test examines are based on 9 broad stratum abilities, although the test is able to produce 20 scores [4] only seven of these broad abilities are more commonly measured: comprehension-knowledge (Gc), fluid reasoning (Gf), short-term memory (Gsm), processing speed (Gs), auditory processing (Ga), visual-spatial ability (Gv), and long-term ...
A block design test is a subtest on many IQ test batteries used as part of assessment of human intelligence. It is thought to tap spatial visualization ability and motor skill . The test-taker uses hand movements to rearrange blocks that have various color patterns on different sides to match a pattern.
Catgut sutures were used by the ancient Romans as early as the 2nd century CE. [138] [139] [140] They also used sutures with metallic hooks. [109] Celsus discusses other kinds of suturing techniques in his medical literature. He wrote that the wounds were to be stitched up. Roman doctors used linen, wool, silk, hair, and clips to seal wounds ...