RESUMEN
BACKGROUND: Chylous ascites is rare, accounting for less than 1% of cases. An appropriate and stepwise approach to its diagnosis and management is of key importance. AIM: To review the current diagnostic approach and management of chylous ascites. METHODS: A literature search was conducted using PubMed using the key words 'chylous', 'ascites', 'cirrhosis', 'pathophysiology', 'nutritional therapy', 'paracentesis", "transjugular intrahepatic portosystemic shunt" and "TIPSS'. Only articles in English were included. RESULTS: Chylous ascites is caused by the traumatic or obstructive disruption of the lymphatic system that leads to extravasation of thoracic or intestinal lymph into the abdominal space and the accumulation of a milky fluid rich in triglycerides. The most common causes are malignancy, cirrhosis and trauma after abdominal surgery. This condition can lead to chyle depletion, which results in nutritional, immunologic and metabolic deficiencies. An ascitic triglyceride concentration above 200 mg/dL is consistent with chylous ascites. Treatment is based on management of the underlying cause and nutritional support. CONCLUSIONS: Chylous ascites is mostly due to malignancy and cirrhosis in adults, and congenital lymphatic disorders in children. Treatment with nutritional optimization and management of the underlying etiology are the cornerstones of therapy. When conservative measures fail, other interventions such as octreotide/somatostatin analogues, surgical ligation, embolization and transjugular intrahepatic portosystemic shunt in patients with cirrhosis can be considered.
Asunto(s)
Ascitis Quilosa , Ascitis Quilosa/diagnóstico , Ascitis Quilosa/etiología , Ascitis Quilosa/terapia , Humanos , Cirrosis Hepática/complicaciones , Enfermedades Linfáticas/complicaciones , Neoplasias/complicaciones , Heridas y Lesiones/complicacionesRESUMEN
1 Isolated duodenum of the rat, exposed to ultraviolet (u.v.) light in the presence of NO2 ions, responded with reversible relaxation. 2 The photorelaxation response did not seem to involve any known receptor mechanisms and was independent of any ganglionic or neuronal influences. 3 Changes in the ionic environment of the tissue showed that NA+ and Ca2+ were essential for the photorelaxation. K+ depolarized-tissue did not show the photoresponse. 4 The presence of the metabolic inhibitors, iodoacetic acid, 2,4-dinitrophenol, sodium fluoride, sodium azide or potassium cyanide, abolished the photorelaxation response. 5 It is proposed that the photorelaxation of the tissue resulted from the liberation of metabolic energy following NO2 ion-dependent absorption of u.v. light energy, which in turn, interfered with the Na+ ion movement across the cell membrane.
Asunto(s)
Duodeno/efectos de la radiación , Contracción Muscular/efectos de la radiación , Relajación Muscular/efectos de la radiación , Rayos Ultravioleta , Animales , Relación Dosis-Respuesta a Droga , Duodeno/efectos de los fármacos , Duodeno/fisiología , Cinética , Relajación Muscular/efectos de los fármacos , Nitritos/farmacología , RatasRESUMEN
Responses of isolated tissue preparations to ultraviolet (UV) light were studied with and without the presence of photosensitizers like eosin, fluorescein and sodium nitrite. Exposure to UV light in the presence of sodium nitrite induced consistent relaxation of rat duodenum. The photorelaxation was found to be related to the concentration of sodium nitrite. Adrenergic or cholinergic mechanisms do not seem to be involved. The isolated rat duodenum preparation exhibited quantitatively consistent photoresponse for 3 to 4 hr at its normal tone obviating the need for additional spasmogens as needed with other preparations. The preparation is a suitable test model for the study of photobiologic response evoked by UV light.
Asunto(s)
Fluoresceínas/farmacología , Corazón/efectos de la radiación , Músculo Liso/efectos de la radiación , Músculos/efectos de la radiación , Nitritos/farmacología , Nitrito de Sodio/farmacología , Rayos Ultravioleta , Animales , Anuros , Eosina Amarillenta-(YS)/farmacología , Cobayas , Corazón/efectos de los fármacos , Técnicas In Vitro , Músculo Liso/efectos de los fármacos , Músculos/efectos de los fármacos , Unión Neuromuscular/efectos de los fármacos , Unión Neuromuscular/efectos de la radiación , Conejos , RatasRESUMEN
A method for continuous registration of perfusion rate of frog blood vessels has been developed utilizing a modified Marey's tambour with lever system, connected to the perfusion bottle. The responses of frong blood vessels to some autonomic drugs have been studied using this method.