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F Katayama

Publications and source records attributed to F Katayama.

11 recordsLinked to original sources

[Successful total laryngectomy in three cases with severe motor and intellectual disabilities syndrome for the management of repetitive lower respiratory tract infections].

Total laryngectomy was successfully performed for the management of repetitive lower respiratory tract infections in three cases with severe motor and intellectual disabilities syndrome. The patients were thirteen, ten and nine years of age and had cerebral palsy, mental retardation and epilepsy which resulted from neonatal asphyxia and seizures. To treat repetitive lower respiratory tract infections, the patients underwent the operation at the age of nine years and a month, seven years and six months, and six years and eleven months, respectively. Postoperatively, the respiratory tract infections were remarkably reduced for two to four years. Total laryngectomy is one of the best methods for the prevention of aspiration pneumonia, because it separates trachea and esophagus completely. The operation is indicated for children with influx of saliva into trachea and gastroesophageal reflux. The family should recognize that this operation causes permanent loss of voice and speech. The bronchoscopy, upper gastrointestinal tract barium studies and esophageal pH monitoring should be performed before the operation. Our cases fulfilled all of these indications. Laryngectomy should be considered as an effective method of respiratory management for cases of severe motor and intellectual disabilities syndrome, although its application should be carefully examined from the point of improvement of quality of life for patients.

Adolescent↗

[Alterations of the mucin components in bile duct epithelium associated with proliferating cholangitis--an experimental study].

Chronic proliferating cholangitis was accompanied by intrahepatic lithiasis, and its detail has not been reported. In this study, the alterations of mucin components were serially investigated using the experimental rabbit model. The proliferating cholangitis was induced by inserting a polyethylene tube to the choledochus through the papilla under laparotomy. The respective five animals were sacrificed 1, 3, 7, 10, 14, and 28 days after the surgery. The animals undergoing Sham operation were defined as control group (n = 5). The alterations of mucin components were determined through histochemical stainings for mucin: AB-PAS (pH 2.5) and AB (pH 1.0) stainings, and also for lectins: wheat germ agglutinin (WGA), Ricinus communis agglutinin (RCA), concanavalin A (Con A), Dolichos biflorus agglutinin (DBA), peanut agglutinin (PNA), soybean agglutinin (SBA), and Ulex eulopeus agglutinin (UEA-I) stainings. In the cholangitis epithelium, the mucin-stainings were temporarily augmented by acid mucins on day 3 and 7, followed by increase in neutral mucins. The significant increases in DBA, SBA, PNA, and RCA were also observed by lectin-staining, and the staining patterns of the former two and the latter two lectins were analogous to those of the neutral and acid mucin, respectively. DBA and SBA are specific to D-N-acetyl-D-galactosamine (DNADG), while PNA and RCA to D-galactose (DG); augmentations of the neutral mucins showed that DNADG and DG were closely related to mucous alterations in the proliferating cholangitis. The quantitative and qualitative alterations of the neutral and acid mucins may play an important role in the development of lithiasis.

Animals↗