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A R Colon

Publications and source records attributed to A R Colon.

14 recordsLinked to original sources
PubMed1992

The brass standard.

Explore the source record for details and available documents.

Gastric Acidity Determination↗
PubMed1991

Lipase and pepsin activity in the gastric mucosa of infants, children, and adults.

The range of activity and the location of lipase and pepsin were determined in the stomach and duodenum of infants, children, and adults. The range of lipase activity in biopsy specimens from the gastric body, in 29 subjects aged from 3 months to 26 years, was 1.8-5.3 U/mg protein (1 U is 1 mumol [3H]oleic acid released from tri-[3H]olein per minute). There were no significant differences among age groups (5-19 months, 2-4 years, 6-10 years, 11-13 years, and 15-26 years). Lipase activity was low or undetectable in the gastric antrum of all subjects. Pepsin activity in specimens from the gastric body ranged from 180 to 780 pepsin units/mg protein (using hemoglobin as substrate). The antrum had significantly lower pepsin activity (P less than 0.001) than the gastric body. As with lipase activity, there were no statistically significant differences in pepsin activity among age groups. Lipase and pepsin activity was also quantified in pinch biopsy specimens from the duodenum and duodenal bulb in 13 subjects. Contrary to lipase activity, which was almost completely absent from the duodenum or duodenal bulb, these sites contained low pepsin activity (9-78 pepsin units/mg protein). The data show that in infants and children, as previously reported in adults, gastric lipase is localized primarily in the gastric body. Tissue pepsin levels and localization, reported here for the first time, are similar to those of lipase, although, contrary to lipase, the gastric antrum has considerable pepsin activity. The identical levels of lipase and pepsin activities in infants, children, and adults indicate that the gastric phase of nutrient digestion is well developed at birth.

Adolescent↗
PubMed1991

Gastroesophageal reflux in infants.

Clinically significant gastroesophageal reflux occurs in one in 500 infants. Symptoms resolve in 60 to 80 percent of infants by 18 months of age. Thickened formula and position changes are often recommended. Medication and surgical intervention may be needed in refractory cases.

Apnea↗
PubMed1989

Colic.

Colic begins between the second and sixth week of life and usually abates by the fourth month of life. Crying may occur any time of the day but is most common after the evening feeding. Removal of cow's-milk protein from the diet eliminates colic in 30 percent of infants. Simethicone and an antispasmodic agent are sometimes helpful.

Colic↗
PubMed1978

Asymptomatic viral hepatitis types A and B in an adolescent population.

Sera from 95 adolescents were examined for markers of hepatitis B virus (HBV) infection and hepatitis A virus (HAV) infection. HBV markers were found in eight adolescents (8%) and evidence of previous HAV infection was found in 18 adolescents (19%); none had a history of clinically recognizable hepatitis. These findings support the growing evidence that HBV and HAV infections are diseases of the pediatric age group, and that testing of HBV vaccines when they become available for patient use will have to include a pediatric population.

Adolescent↗
PubMed1976

Gastrointestinal phenomena in childhood typhoid fever.

Ninety-four children with typhoid fever presented with the primary complaints of fever, diarrhea, and vomiting. Fifty-two percent had hepatomegaly and derangements of SGOT and LDH. None developed hepatic decompensation and all had rapid clinical recovery. The abnormal liver function test served no prognostic purpose.

Adolescent↗