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A perforation is a small hole in a thin material or web. There is usually more than one perforation in an organized fashion, where all of the holes collectively are called a perforation. The process of creating perforations is called perforating, which involves removing bits of the workpiece with a tool. Old-fashioned lick-and-stick postage ...
Gastrointestinal perforation, also known as gastrointestinal rupture, [1] is a hole in the wall of the gastrointestinal tract. The gastrointestinal tract is composed of hollow digestive organs leading from the mouth to the anus. [3] Symptoms of gastrointestinal perforation commonly include severe abdominal pain, nausea, and vomiting. [2]
Organ perforation is a complete penetration of the wall of a hollow organ in the body, such as the gastrointestinal tract in the case of gastrointestinal perforation. It mainly refers to accidental or pathologic perforation, rather than intentional penetration during surgery. It can lead to peritonitis if untreated. [2]
Stercoral perforation [1] is the perforation or rupture of the intestine's walls by its internal contents, such as hardened feces or foreign objects. Hardened stools may form in prolonged constipation or other diseases which cause obstruction of transit, such as Chagas disease, Hirschprung's disease, toxic colitis, hypercalcemia, and megacolon.
A nasal septum perforation is a medical condition in which the nasal septum, the bony/cartilaginous wall dividing the nasal cavities, develops a hole or fissure. [1]This may be brought on directly, as in the case of nasal piercings, or indirectly, as by long-term topical drug application, including nasal administration of ethylphenidate, methamphetamine, cocaine, crushed prescription pills, or ...
A perforation is a small hole in a thin material or web. Perforation may also refer to: A leaf feature; Perforation (oil well), a hole punched in the casing or liner of an oil well to connect it to the reservoir; Perforation gauge, a term used in philately; Postage stamp perforation, used to separate postage stamps
The KS1870 perforation, or KS perforation with a pitch of 0.1870", is the modern standard for release prints as well as for 135 still camera film. 65/70 mm, the other "professional" standard, was created many years after KS perforations had been recommended for negative as well as positive applications, and was adopted for positive applications.
A perforation in the context of oil wells refers to a hole punched in the casing or liner of an oil well to connect it to the reservoir. It creates a channel between the pay zone and the wellbore to cause oil and gas to flow to the wellbore easily.