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Biomedical subjects

A Sugitani

Publications and source records attributed to A Sugitani.

At least 37 records · Page 2Linked to original sources
PubMed1997

En bloc pancreas and kidney transplantation in a patient with limited vascular access.

We report a successful en bloc pancreas and kidney transplantation on a type I diabetic patient with advanced peripheral arterial calcific disease, who had frequent life-threatening episodes of hypoglycemia. The en bloc double organ, created by joining the graft renal artery to the arterial Y graft of the pancreas, was implanted to the proximal left common iliac artery, which was the only site available for an arterial anastomosis. Under appropriate circumstances, this procedure would be an option for potential combined pancreas-kidney transplant recipients with severe calcific arterial disease.

Adult↗
PubMed1997

The effect of small bowel transplantation on the morphology and physiology of intestinal muscle: a comparison of autografts versus allografts in dogs.

The effects of acute (AR) and chronic rejection (CR) on intestinal smooth muscle that are responsible for the dysmotility following small bowel transplantation (SBTX) are incompletely understood. Jejunal and ileal specimens from normal control dogs (n=7), and autotransplanted dogs were examined at 7 days (n=6) and 1 (n=7), 3 (n=6), 6 (n=6), and 12 months (n=6). Allotransplanted dogs that developed AR (n=8) and CR (n=5) were examined for gross and microscopic morphology (muscle thickness, the number and size of myocytes, and inflammatory infiltrate), and for contractile and intracellular electrical function in vitro. Auto-SBTX did not alter morphology at any period, but contractile function was impaired at 7 days (73.6%) compared with normal intestine. Acute rejection did not influence myocyte number or size, but was associated with a prominent infiltrate of neutrophils and lymphocytes, and severely impaired contractile function (20.6%) compared with auto-SBTX controls. Acute rejection also significantly inhibited the amplitude of slow waves and of inhibitory junction potentials. Chronic rejection caused thickening of muscularis propria by both hyperplasia (175.5%) and hypertrophy (202.6%) accompanied by moderate inflammatory cell infiltrate compared with auto-SBTX controls. We conclude that the marked inflammatory infiltrate into the muscularis propria indicates that the graft muscle is injured by both acute and chronic rejection; impaired function of intestinal smooth muscle following SBTX results from both rejection and the injury associated with transplantation, and chronic rejection following SBTX is associated with both hyperplasia and hypertrophy of the muscularis propria.

Analysis of Variance↗
PubMed1994

Immunohistochemical study of enteric nervous system after small bowel transplantation in humans.

The neurohormonal structures of two human intestines removed due to rejection 22 months and eight months after intestinal transplantation were studied by an indirect immunohistochemical method and compared with normal ileum. The distribution and density of neurons immunoreactive for tyrosine hydroxylase, substance P, calcitonin gene-related peptide, neuropeptide Y, vasoactive intestinal peptide, galanin, gastrin-releasing peptide, L-enkephalin, and somatostatin were examined. Mucosal endocrine cells immunoreactive for somatostatin, peptide YY, and glucagon were also examined. Extrinsic adrenergic fibers and perivascular fibers were absent in all intestinal layers of the failed grafts. The distribution of intrinsic neurons was unchanged; however, the density was decreased by one rank. Distribution of endocrine cells of the first graft was similar to the normal. Extrinsic fibers were not detected by immunohistochemistry in human small intestinal grafts following long-term survival and eventual rejection, while the immunohistochemical expression of intrinsic neural and endocrine transmitters were well preserved.

Adult↗
PubMed1993

The ipsilateral organization of the afferent nerves to the stomach.

In previous nerve tracing studies we found evidence that the efferent gastric vagus nerves supplying the anterior gastric wall had a regional organization. The first part of this study aimed to determine whether vagus afferent nerve cells supplying the stomach have a regional organization; an ipsilateral pattern of innervation was found. Next, selective blockade of the afferent nerves was performed and verified by axonal tracing. Animals with afferent blockade were stressed to determine the effect of afferent nerve blockade on the gastric stress response. After selective blockade of afferent vagus nerves to the anterior gastric wall in rats, water-immersion stress was then applied. The part of the gastric wall with afferent nerve blockade had fewer acute gastric lesions than control animals or the contralateral side of the stomach after 24 hr of stress. This study supports the hypothesis that afferent as well as efferent vagus nerves have an ipsilateral arrangement. Afferent nerve blockade of the left vagus nerve protected the anterior wall of the stomach against stress ulceration.

Afferent Pathways↗
PubMed1992

Lymphangioma in the small intestine: report of a case and review of the Japanese literature.

We report herein a rare case of a 53 year old man with a benign lymphangioma of the small intestine. He presented with a complete obstruction of the small intestine and radiological examination revealed a small intestinal tumor. A long intestinal tube was passed, the intestinograms from which detected a submucosal tumor of the small intestine. Partial resection of the small intestine was thus performed and the tumor was found to be located mainly in the submucosa. The final pathological diagnosis was made as cavernous lymphangioma. This case is presented with a description of the roentgen appearance, followed by a review of the Japanese literature.

Adult↗
PubMed1992

Inhibition of afferent vagus nerves decreases gastric stress lesions.

Capsaicin (Sigma Chemical Co.) is a unique chemical agent that causes degeneration of afferent nerve fibers. Previous conclusions about Capsaicin effects on the gastric mucosal response to stress have not precisely defined which afferent nerves were affected. Therefore, the aim of the first portion of this study was to define the origin of afferent vagus nerves to the anterior gastric wall after injections of fluorogold (which is an axonal tracer) into the stomach. The second part of this study was to compare the stress effects on the gastric mucosa in rats with impaired afferent nerve function after Capsaicin treatment.

Acute Disease↗
PubMed1992

[A case of cervical myelopathy due to atlanto-axial subluxation with athetoid cerebral palsy].

We reported cervical myelopathy due to atlanto-axial subluxation of athetoid quadriplegia of cerebral palsy. This lesion was present from upper cervix to lower medulla oblongata, and appeared on MRI. The changes of sSEP was useful to evaluate his spinal function. We think that pediatricians need to understand this pathophysiology, particularly for multihandicapped children.

Adolescent↗
PubMed1991

Viscerotopic representation of preganglionic efferent vagus nerve in the brainstem of the rat: a Fluoro-Gold study.

To investigate the viscerotopic distribution of the cells of origin of preganglionic vagus nerve in rats, Fluoro-Gold was injected into various visceral tissues. After injections into the gastroesophageal junction and the gastric corpus, labelled cells were localized in the medial half of the dorsal motor nucleus of the vagus (dmnX). Cells in the nucleus ambiguous (nA) were also labelled after injections into the gastroesophageal junction. After injections into the pancreatic head and the celiac plexus, labelled cells were located bilaterally in the lateral part of the caudal dmnX. In the rostral dmnX, however, the pancreatic head was represented in the medial segment. After injections into the lung, duodenum, liver and ascending colon, no labelling was observed in the brainstem.

Adhesives↗
PubMed1991

Gastrointestinal endoscopy and general surgical practice. Surgical endoscopy versus surgeon endoscopists.

Endoscopic studies and treatment are a necessary and vital component of General Surgery practice. Since most of the concepts related to therapeutic endoscopy were conceived and developed in the context of surgical science, it is both appropriate and necessary that surgeons continue their involvement with this modality. Furthermore, within the evolution of surgical science, endoscopic tools will continue to be utilized.

Digestive System↗
PubMed1990

[A case report of very huge dermatofibrosarcoma protuberans].

A 63-year-old male with dermatofibrosarcoma protuberans of the right hip is presented. The patient noticed a small nontender mass 40 years ago and then the tumor enlarged gradually. The patient was very emaciated and needed to receive blood transfusions. The massive multinodular tumor was pedunculated and on it's surface, there were areas of hemorrhage and secondary infection. The operative specimen weighted 2270 g and measured up to 25 by 20 by 10 cm. To our knowledge, this case represents the largest primary tumor of a dermatofibrosarcoma protuberans in review of English literature.

Fibrosarcoma↗
PubMed1986

The syndrome of the absence of a septum pellucidum with porencephaly.

Two cases of a complex brain malformation including the absence of a septum pellucidum and bilateral porencephaly were reported and compared with Aicardi's cases. The two cases have congenital hemiplegia or double hemiplegia and mental retardation, and one of them has optic atrophy. CT scans revealed the absence of a septum pellucidum and a specific position and shape of the clefts. The syndrome of the absence of a septum pellucidum and porencephaly may represent a specific type of true porencephaly, and the cause must occur before 16 weeks of gestation.

Adolescent↗