MEDICINA INTERNA DE WWW.INTERHIPER.COM

  APARATO  DIGESTIVO

ENFERMEDAD                                                      SINDROME DE MALABSORCION

  CONCEPTO                  Procesos en los que estan afectados la hidrólisis y absorcion de los alimentos.

                                 Asimilacion ®  organos que intervienen: Higado (Sales Biliares)

                                                                                         Pancreas (Enzimas de Hidrólisis)

                                                                                         Intestino Delgado (Absorcion en las vellosidades)

                                                                                         Sistema Linfatico (Absorcion de las grasas)

  

CARACTERISTICAS           FISIOLOGIA:    Hidratos de carbono: Almidon y disacaridos ------®  Monosacaridos -------®  Absorcion a sangre

                                                                              		    h
				   Amilasa salival y pancreatica   + Disacaridasas en vellosidades intestinales


                                                       Grasas:    Trigliceridos    -------------®  Acidos grasos y Colesterol

                                                                 Lipasa pancreatica  h      Sales Biliares-g     i 
                                                                                                                                          Absorcion celular  ®  Trigliceridos  ®  Sistema Linfatico  ®  Absorcion a sangre

                                                                                                                                                                                         B-Lipotropina ®  h


                                                      Proteinas:  Polipeptidos ®  Tripeptidos y Dipeptidos   ------------------------®  Aminoacidos ®  Absorcion a sangre

                                                                                           h----Tripsina y Quimiotripsina pancreatica     h------------Peptidasa intestinal
 

  ETIOLOGIA                   CLASIFICACION: Trastornos de la Hidrólisis o Digestion: Insuficiencia Pancreatica: Adultos: Pancreatitis cronica

                                                                                                                                                                    Neoplasia de pancreas

                                                                                                                                                                    Fistula pancreatica

                                                                                                                                                        Niños: Fibrosis quistica del pancreas

                                                                                                                   Insuficiencia Hepatobiliar: Hepatitis aguda

                                                                                                                                                        Cirrosis hepatica

                                                                                                                                                        Obstruccion biliar extrahepatica

                                                                                                                   Disminucion de la secreccion intestinal: Reseccion intestinal quirurgica.

                                                                                                                                                                           Fistula intestinal.

                                                            Trastornos de la Absorcion: Primarios: Enteropatia por Gluten o Enfermedad celiaca.

                                                                                                                  Esprue Tropical

                                                                                                                  Disminucion de las Disacaridasas

                                                                                                   Secundarios: Anomalias bioquimicas: A B - Lipoproteinas

                                                                                                                      Disminucion del reservorio intestinal

                                                                                                                      Alteraciones de la pared intestinal: Tuberculosis intestinal

                                                                                                                                                                       Enfermedad de Cronh

                                                                                                                      Alteraciones en la flora intestinal: Asa ciega

                                                                                                                                                                     Diverticulos

                                                                                                                      Obstrucciones linfaticas: Enfermedad de Whipple

                                                                                                                                                          Tumores de intestino y Linfomas

                                                                                                                      Otras: Hipertiroidismo

                                                                                                                                Sindrome carcinoide

                                                                                                                                Insuficiencia vascular mesenterica

 

  DIAGNOSTICO                Absorcion de: Grasas: Examen macro y microscopico de las heces ®  Grasas, pastosas, amarillentas, de olor rancio.

                                                                   Cuantificacion de la grasa en heces ®  Por encima de 4,5 gr. ®  esteatorrea y malabsorcion.

                                                                   Marcaje de Lipidos con isotopos radiactivos y seguimiento.

                                                                   Recuento de quilomicrones en sangre.

                                                      Proteinas: Examen macro y microscopico de las heces g Se ven alimentos enteros.

                                                                     Cuantificacion de Nitrogeno fecal.

                                                                     Albumina marcada con yodo y plomo radiactivo.

                                                      Carbohidratos: Curva de glucemia ®  Curva plana cuando es igual o inferior a 25 - 40 mgr.

                                                                            Tolerancia al almidon.

                                                                            Prueba de la D-Xilosa ®  Administracion y recogida en orina durante 6 horas

                                                                                                               Si hay pocas cantidades ®  Absorcion alterada.

                                                      Vitaminas: Prueba de la Vitamina A

                                                                      Test de Schilling ®  Para observar la absorcion de Vit B12

                                                                                                     Carencia de Vit B12 ®  Anemia Megaloblastica.

                                                      Resumen:  Examen Macro y microscopico de las heces.

                                                                      Curva de glucemia

                                                                      Cuantificacion de grasa en heces.

                                                                      D-Xilosa.

 

 

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