From Wikipedia, the free encyclopedia. Diagenesis /ËdaÉªÉËdÊÉnÉsÉªs/ is the change of sediments or existing sedimentary rocks into a different sedimentary rock during and after rock formation (lithification), at temperatures and pressures less than that required for the formation of metamorphic rocks.It does not include changes from weathering.he term diagenesis, literally meaning across generation, is extensively used in geology. However, this term has filtered into the field of anthropology, archaeology and paleontology to describe the changes and alterations that take place on skeletal (biological) material.
The propofol dosage typically was an initial bolus of 20 to 40 mg, followed by 10 to 20 mg boluses to maintain sedation. Sipe reported that propofol achieved faster time to sedation, greater depth of sedation and faster recovery than midazolam/meperidine sedation. Complication rates were similar.
Some gastroenterologists say sedation using the powerful sedative propofol is unnecessary for colonoscopies. (Richard Vogel / Associated Press). Paul Thornton. The thought of undergoing a colonoscopy while not completely unconscious might give you shivers. And it shouldn't, say several doctors who perform the procedure.ajen Mathews of Fullerton, also a gastroenterologist, outlines the propofol-free protocol: Moderate sedation with medications like fentanyl and versed is universally used for colonoscopies. At my endoscopy center in Fullerton, we perform about 12,000 procedures a year, and 95% of them are done under moderate sedation.