Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0042961 (volvulus)
 4,305 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In reviewing the records of almost 1000 infants and children with intussusception in two children's hospitals over the last 25 yr, there have been seven bowel perforations during attempted hydrostatic barium enema reduction of an intussusception. Except for one instance, these have all occurred during the last 6 yr. The infants were all 6 mo old or less and most had a preceeding viral illness. Only 4 of the 7 had pain, all vomited, in only 2 was a mass felt and all but 1 had rectal bleeding. The duration of these signs and symptoms was longer than 36 hr with most ill for 3 or 4 days. All seven infants had abdominal x-rays that showed complete small bowel obstruction. Once the intussusception was suspected, barium enema reduction was attempted without excessive hydrostatic pressure and not for a prolonged time; all the ileocolic intussusceptions were met in the transverse colon with only a minimal reduction produced. It was at this time that a perforation was suddenly noted. All infants required immediate right hemicolectomy for the area (s) of colonic necrosis. Postoperatively, there were two wound infections, a volvulus which left the child with a short gut and another infant suffered severe brain damage. These babies seem to fit a pattern in which they are younger and sicker longer than the average infant with an intussusception, and have a complete small bowel obstruction. These facts may be a warning that such infants are at increased risk for a barium enema bowel perforation.
 ...
PMID:Colon perforation during attempted barium enema reduction of intussusception. 725 34

Fly load of Onchocerca volvulus microfilariae and their early development in Simulium ochraceum were examined at intervals of 10, 30 and 60 min after ingestion and then hourly up to 72 hours. Many microfilariae ingested were damaged by the cibarial armature of the vector, limiting the fly load, but some of these damaged microfilariae were able to penetrate the gut before they died. Thus, the mean number of the living parasites per fly in the head and thorax decreased gradually with elapse of time after ingestion. The parasites ingested by S. ochraceum did not develop beyond the microfilarial stages during the first 24 hours; thereafter only thoracic forms (1st-stage larvae) were found to be alive. The high mortality of the infected fly might be caused by the high intakes of microfilariae and also by normal and/or partly wounded microfilariae invading various organs. The number of microfilaria ingested from different biting sites were usually high in comparison with the densities observed in each site; this indicates that the microfilariae might be attracted by the biting females.
 ...
PMID:Limited fly load and development of Onchocerca volvulus microfilariae in Guatemalan Simulium ochraceum. 727 5

Sepsis secondary to bacterial translocation is common in infants with short bowel syndrome (SBS). Although early feeding is advocated to enhance adaptation in SBS, the effects of feeding on sepsis in SBS patients have not been examined. Twenty-one infants and children (aged 2 months to 3 years) with SBS (< 80 cm small bowel length) from a variety of causes (15 necrotizing enterocolitis, 2 atresia, 2 gastroschisis, 2 volvulus) had follow-up prospectively for septic episodes before and after feedings were initiated, while still receiving total parenteral nutrition. The incidence and number of septic episodes and microbiology (blood cultures) were tabulated and compared with those of 20 patients with similar ages, and diagnoses without SBS. Statistically significant differences among infants with SBS were noted with respect to sepsis incidence (6 of 21 [29%] NPO v 16 of 21 [76%] feeding) number of septic episodes (1.3 +/- .2 NPO v 4.2 +/- .4 feeding), and presence of gram-negative rods causing bacteremia (1 of 6 [17%] NPO v 13 of 16 [81%] feeding) (all: P < .05). There were similar differences between SBS and non-SBS infants. These data show that enteral feeding increases the incidence and number of episodes of sepsis in SBS infants, but not in matched non-SBS patients. The predominance of gram-negative organisms in sepsis in SBS suggests increased gut bacterial translocation in these patients, implying that selective gut decontamination may reduce the episodes of bacteremia.
 ...
PMID:Enteral feeding increases sepsis in infants with short bowel syndrome. 747 38

The electron microscopic investigation of the anterior part of the infective third-stage juvenile of Onchocerca volvulus provides first insights into the structure of the excretory system of this developmental stage of the parasite. The most anterior part of this system consists of a cell process of the syncytial excretory cells. At this height the excretory cells enclose the cuticle-lined excretory channel. The channel is in the process of elongation in the anterior-posterior direction, indicated by cell division in this region. More posteriad an ampulla-like structure is forming in the cytoplasm of the excretory cells. The inner surface of this ampulla is lined with a small number of single microvilli. In this part of the system the cytoplasm of the excretory cells is rich in Golgi bodies and endocytic vesicles. The ampulla has direct access to the exterior by the excretory duct. The excretory duct is a cuticle-lined structure surrounded by supporting fibres of an additional cell. This duct cell connects the excretory duct to the body-wall cuticle at the excretory pore. Adjacent to the region of the excretory system a cell is found that resembles a gland cell. This cell is in close contact to the ventral nerve cord. The genital primordia of the third-stage juvenile consist of several dividing cells. The female genital primordium is seen at the junction of the muscular with the glandular oesophagus and the male primordium can be found at the junction of the glandular oesophagus with the gut.
 ...
PMID:Ultrastructure study of the excretory system and the genital primordium of the infective stage of Onchocerca volvulus (Nematoda:Filarioidea). 750 40

A previous paper reported that the intake of Onchocerca volvulus microfilariae (mff) by different species of Simulium is essentially proportional to the parasite load in the skin of infected carriers. This paper examines the fate of the ingested mff in susceptible vectors to assess the relationship between parasite intake and infective larval output in blackfly species with and without well-developed cibarial armatures. Analysis is based on data from 3 onchocerciasis endemic areas: Guatemala (S. ochraceum s.l.), West Africa (S. damnosum s.l./S. sirbanum) and the Amazonian focus between South Venezuela and Northern Brazil (S. guianense and S. oyapockense s.l.). The data, which include published and unedited information collected in the field, record experimental studies of parasite uptake by wild flies maintained in captivity until the completion of the extrinsic incubation period. The relationship between L3 output (measured as the mean number of successful larvae/fly or, as the proportion of flies with infective larvae) and average microfilarial intake, was strongly non-linear. This non-linearity was best represented by a sigmoid function in case of armed simuliids (S. ochraceum s.l., S. oyapockense s.l.), or by a hyperbolic expression in that of unarmed flies (S. damnosum s.l., S. guianense). These results are compatible, respectively, with the patterns of 'initial facilitation' and 'limitation' described in culicid vectors of lymphatic filariases. A maximum mean number of 1-3 L3/fly was observed in all 4 vectors. It is concluded that O. volvulus larval development to the infective stage is regulated by density-dependent mechanisms acting at the early phase of microfilarial migration out of the blackfly's bloodmeal. Damage by the bucco-pharyngeal armature may also be density dependent. A hypothesis, based on this density dependence is forwarded to explain initial facilitation, so far only recorded in vectors with well-developed cibarial teeth. Our results provide quantitative support for the conjecture that chemotherapy alone is likely to have a greater impact on reducing onchocerciasis transmission in endemic areas where the main vector has a toothed fore-gut than in foci where the vectors have unarmed cibaria.
 ...
PMID:Density-dependent processes in the transmission of human onchocerciasis: relationship between the numbers of microfilariae ingested and successful larval development in the simuliid vector. 775 82

A case of chronic small bowel obstruction due to intestinal malrotation in a 13.5-year-old girl is reported. The importance of the patient's history revealing the recurrent character of the symptoms, and of different radiological features are emphasized, in order to prevent late diagnosis. Diagnosis of psychogenic disorder is only retained after exclusion of all organic anomalies. At surgery the bowel is placed in the primitive position of the non-rotated gut, after reduction or resection of the volvulus, if present.
 ...
PMID:Chronic small bowel obstruction due to intestinal malrotation in the older child: an often missed diagnosis. 814 Aug 36

Rotational gut abnormalities are generally considered a disease process of the neonatal and pediatric populations. However, they may first become manifest in teenagers and adults, often with disastrous outcomes. A case of a 15-year-old boy who presented in shock with an acute abdomen is presented. His symptoms had been mistaken for 1 week as gastroenteritis. At surgery, he was found to have a midgut volvulus. A differential diagnosis is discussed, as well as an anatomical review and typical symptomatology associated with midgut abnormalities.
 ...
PMID:Midgut volvulus: an unusual case of adolescent abdominal pain. 816 89

Volvulus of the transverse colon is a very rare entity, representing 1 to 3.4% of all volvuli of the colon. We report three cases illustrating the problems of this pathology. The presentation is usually acute, leading to prompt surgery. Multiple etiologies may be combined: congenital malrotations of the gut, chronic constipation in the elderly enhanced by psychiatric medications, and mechanical by adhesion bands which help to create anomalous rotation axes for the volvulus. The best treatment must be surgical, and we recommend an aggressive approach: an extended right colectomy, which gave good results in our patients.
 ...
PMID:[Volvulus of the transverse colon. Apropos of three cases]. 821 71

The main symptom of the congenital diaphragmatic hernia (CDH) is the respiratory distress due to the pulmonary hypoplasia and the persistence of foetal pulmonary circulation. Sometimes the CDH appears outside of the neonatal period with respiratory symptoms, abdominal pain and seldom with intestinal obstruction. A case of CDH presenting with intrathoracic volvulus is reported. This case shows that tendency of delayed repair until the newborn has been recovered, require more attention because the good condition of the patient can be changed not only by the pulmonary hypoplasia and the persistence of the foetal pulmonary circulation but also by the symptoms of the intrathoracic gut complications.
 ...
PMID:Congenital diaphragmatic hernia and intrathoracic intestinal volvulus. 829 83

A 20-month old infant, who had short bowel syndrome following extensive surgery for a mid gut volvulus, developed hyperchloremic acidosis, with a large anion gap after enteral feeding was instituted. The organic acidosis was at least partly due to an increased concentration of D-lactic acid. This patient, as did five other pediatric patients, presented with a typical encephalopathy syndrome. Early recognition of this syndrome and treatment with an intestinal antibiotic and discontinuation of enteral feeding enabled prompt correction of the hyperchloremic acidosis and a rapid clinical recovery.
 ...
PMID:D-lactic acidosis: a treatable encephalopathy in pediatric patients. 845 9


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>