Name: murine ileocolic bowel resection with primary anastomosis
Uploaded: 2014-10-29T14:00:00.000+00:00
Duration: 8 min 49 s
Description: Watch this Scientific Journal Video about Murine Ileocolic Bowel Resection with Primary Anastomosis at JoVE.com

We would like to acknowledge the funding contributions of the Canadian Surgical Research Fund, the Edmonton Civic Employees Research Assistance Fund, and the Alberta IBD Consortium through a grant from Alberta Innovates.

Protocolos de uso de los animales fueron aprobados por el Cuidado de Animales y el empleo Comisión de Ciencias de la Salud de la Universidad de Alberta. 1. Preparación de Instrumentos, Animales y Configuración Operativo <ol><li> Transferencia de los animales a una nueva, ausente jaula limpia de todos los alimentos sólidos 24 h antes del procedimiento. Ellos pueden tener libre acceso al agua, y el líquido dieta ad libitum hasta el momento del procedimiento. </li><li> Autoclave todos los instrumentos necesarios para el procedimiento. Superficie de operación Limpie y cono de la nariz anestesia con etanol al 70%. </li><li> Configurar la superficie de funcionamiento con el microscopio operativo, máquina de anestesia y materiales de construcción de una manera que sea cómoda para el cirujano. Los codos del cirujano se debe permitir que descansar cómodamente en la mesa de operaciones, con las manos y los brazos sin obstáculos por equipos. Instrumentos, suturas, hisopos de algodón, y una jeringa de 10 ml se deben colocar en un lugar que permite un fácil acceso durante el procedimiento. </li><li> Prepararlámparas de calor de arriba para proporcionar tanto calor para el animal durante el procedimiento y de la luz para la superficie de funcionamiento. </li><li> Llenar un tubo cónico de 50 ml con 0.9% de solución salina, y un tubo de 1,5 ml con vaselina y el lugar cerca de la superficie de funcionamiento. NOTA: Esterilizar todos los instrumentos y suministros quirúrgicos. Debido a que el intestino se secciona, el procedimiento en sí no es estéril. Se considera limpia-contaminada. Tome medidas para evitar la introducción de fuentes exógenas de la infección. </li></ol> 2. La resección ileocólica con anastomosis <ol><li> Inducir la anestesia mediante la administración de 4% de isoflurano con una tasa de flujo de oxígeno de 2 L / min a través de cono de la nariz desde el vaporizador de isoflurano hasta que la tasa respiratoria animales se desacelera a aproximadamente 30-40 respiraciones / min. Aplique una presión moderada a la pata trasera del ratón para asegurar que no haya respuesta de dolor antes de iniciar el procedimiento. En este punto, baje isoflurano al 2% y el flujo de oxígeno a 0,5 L / min. De forma intermitentecomprobar la respuesta al dolor durante el procedimiento y ajustar la velocidad de flujo de isoflurano en consecuencia. </li><li> Aplique vaselina en los ojos para evitar que se seque durante la cirugía, e inmovilizar el ratón en la posición supina con las extremidades garantizados utilizando cinta adhesiva transparente. </li><li> Limpie el abdomen con solución povodine / yodo, y el cambio en los nuevos guantes estériles. </li><li> Hacer una incisión en la piel de 1,5 cm en la línea media superior del abdomen utilizando punta afilada disección tijeras para exponer la fascia y el peritoneo. Abra la capa fascial / peritoneal de una manera similar a través de la línea alba para exponer los contenidos peritoneales. </li><li> En contraste con los seres humanos, el ciego ratón se encuentra típicamente en el cuadrante superior izquierdo del abdomen. Una vez identificado, agarre suavemente el ciego con fórceps y entregarlo a través de la incisión. Use hisopos de algodón humedecidos en abanico de aproximadamente 3 cm de íleon terminal que se extiende desde el ciego sobre una gasa estéril cubierto en la superficie abdominal (Figura 1A).Asegúrese de que el intestino expuesto se mantiene húmedo con 0,9% de solución salina durante la totalidad del procedimiento. </li><li> Identificar la arteria ileocecal ramificación de la arteria mesentérica superior lo largo del colon (Figura 1A) usando el microscopio operativo. Diseccionar los tejidos avasculares adyacentes a la arteria ileocecal, rodear y se liga la arteria con un lazo de seda 5-0. A continuación, localice el suministro de sangre regional para el íleon terminal y elegir un punto transección 1,5-2 cm proximal a la unión ileocecal. Ligar las ramas a esta sección de íleon como anteriormente. Divida las arterias con micro tijeras de disección. </li><li> Divida las porciones isquémicas del íleon y colon asegurándose de que hay suficiente suministro de sangre a los extremos seccionados (Figura 1B). A menudo es útil para espatuladas el íleon dividiéndolo en un ángulo de 30 grados para aumentar el diámetro de la luz por lo que es más compatible con el colon. Una vez que la porción ileocecal del intestino se ha eliminado, alinee elestán alineados extremos seccionados del íleon y colon en la gasa, asegurando las fronteras mesentéricas de cada uno. </li><li> Construir la anastomosis mediante la aproximación final seccionado de íleon hasta el final seccionado de colon usando interrumpido 8-0 suturas de polipropileno (Figura 1C). El primer punto se coloca en el borde mesentérico, con suturas posteriores colocan cada 0.5 mm hasta que la anastomosis ileocólica es hermético. Al pasar la aguja de sutura a través del íleon y colon, asegúrese de que el borde de corte no se enrolla, y picaduras de agujas son de 0,5 mm de los bordes cortados del intestino. Una anastomosis típica requerirá de 14 a 16 suturas interrumpidas. Prueba de la integridad y la permeabilidad de la anastomosis al finalizar haciendo rodar una proximal a distal hisopo de algodón sobre el íleon para forzar los contenidos a través de la anastomosis. El contenido del intestino pequeños deben pasar libremente hacia el colon sin dehiscencia de la anastomosis. </li><li> Enjuague el intestino expuesto con 3.4 ml de solución salina al 0,9% de la jeringa de 10 mlpara lavar las heces de la superficie del intestino, del intestino y entregar de nuevo en la cavidad peritoneal. El uso de 2 ml de solución salina al 0,9% a enjuagar la cavidad peritoneal, y luego drenar este líquido mediante la aplicación de presión suave en la pared abdominal lateral. </li><li> Cierre la incisión con una sutura continua de seda 3-0, y suspender el flujo de isoflurano. Administrar 0,1 mg / kg del opiáceo de acción prolongada -buprenorphine- por vía subcutánea para el control del dolor post-operatorio. </li><li> Observe los animales bajo la lámpara de calor hasta que son móviles a continuación, transferirlos a una jaula continuamente calentado. </li></ol> 3. Cuidado post-operatorio y Monitoreo <ol><li> Observar a los animales en una jaula continuamente calentado para signos de sufrimiento para el resto del día. Transfiera los animales de vuelta al centro de cuidado de los animales en una nueva jaula estéril con el acceso a la dieta líquida y agua ad lib. Los animales pueden ser alojados en grupos de 3-4. </li><li> Lleve a cabo un control de los animales después de la operación a la mañana siguiente,aseguran que los animales no aparecen en la angustia. Alimente sólo dieta líquida. Si aparecen incómodo (es decir, postura encorvada o actividad mínima) administrar una dosis adicional de buprenorfina subcutánea. Compruebe en los animales una vez más por la tarde en el día después de la operación 1. </li><li> En la mañana del día después de la operación 2 los animales deben aparecer totalmente recuperado. Evidencia de consumo de alimentos y las deposiciones son signos positivos de recuperación. Ahora, reanudar una dieta de pienso sólido para los animales. NOTA: Los signos de angustia incluyen postura encorvada, la mala preparación, y la actividad mínima. Si los signos de angustia son prominentes los animales deben ser sacrificados. </li><li> La eutanasia a los animales mediante la inducción de la anestesia profunda con 4% de isoflurano a una tasa de flujo de O 2 de 2 L / min hasta que los animales no responden a la presión del pie. Realizar dislocación cervical, y observar si hay signos de eutanasia adecuado. </li><li> Directrices varían, por lo que se refiere a las recomendaciones de las instituciones con respecto a las indicacionesy de métodos apropiados de eutanasia en ratones. </li></ol>

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The authors have nothing to disclose

El ICR murino es un modelo de gran alcance que se puede utilizar para estudiar los efectos de la cirugía en enfermedades intestinales. En este artículo se describe un método para realizar ICR en ratones con una tasa de éxito del 95% y no hay problemas con la falta de crecimiento que se refleja en los pesos estables hasta 28 días después del procedimiento. Los desafíos más importantes para el éxito de ICR incluyen evitar obstrucciones intestinales en la anastomosis y fugas anastomóticas. <p class="jove_cont...

Ileocolic resection (ICR) is a common procedure performed in both emergent and elective situations for a variety of illnesses. Crohn&#8217;s disease and colon cancers are the two most common indications for ICR. In both illnesses, recurrence in the bowel at the site of surgery represents a major clinical problem. Local recurrence rates for colon cancer remain an issue even with the most aggressive resections1. Following ICR in Crohn&#8217;s disease, the disease most frequently (in up to 80%) recurs in the neo-terminal ileum at 1 year after surgery2. Given the impact of these two illnesses and their recurrence after surgery, it is important to understand local intestinal factors after ICR, which may have intrinsic influences on the natural history of these diseases. Further, it is also important to consider anastomotic healing after ICR. In the early post-operative period, anastomotic leaks can have devastating consequences for patients resulting in repeat surgeries, stoma creations, significant morbidity, and even mortality3. Despite the importance of this topic, our current understanding of anastomotic healing remains in its infancy as a subject of research. Animal models of ICR, in particular mice, are an excellent platform for studying the intestinal and anastomotic healing following surgery.
A mouse model of ICR was initially developed by Helmrath et al. to be used as a model of short gut syndrome4. The authors experimented with various diet regiments and suture sizes to optimize animal survival following ICR. They concluded that feeding with liquid diet in the perioperative period and using 9-0 monofilament sutures resulted in an optimal post-operative survival of 88%. Since this initial publication, ICR in mice removing 50% of the small bowel has been used in several studies to explore the dynamics of massive small bowel resection and the adaptive growth response in attempt to develop new therapies for short gut syndrome5,6.
The first application of the ICR mouse model to Crohn&#8217;s disease used the IL-10-/- mouse model, which spontaneously develops colitis7. The authors found that after ICR these animals developed inflammation in the neo-terminal ileum similar to that seen in post-operative Crohn&#8217;s disease patients, and that this inflammation was dependent on the presence of bacteria7. More recently, this model was used to explore bacterial changes induced by ICR. In Crohn&#8217;s disease there is an associated dysbiosis with relative decreases in bacteria known to have anti-inflammatory properties and increases in invasive species of bacteria8,9. The association holds true in cases of post-operative recurrence10. Two studies sought to identify microbial changes resulting from ICR. The first used IL-10 null mice, and performed denaturing gel electrophoresis to compare bacterial similarity between the small bowel and colon after ICR11. This study demonstrated that bacterial populations became similar in the small intestine and colon following ICR. A subsequent study used wild type mice and 16s pyrosequencing for phylogenetic classification of bacterial species post-operatively. This study demonstrated a marked shift in bacterial species resulting from surgery alone with Clostridium species becoming dominant as well as an increase in &#978;-proteobacteria. The results also confirmed the findings of the previous study with similar populations found in the small bowel and colon after ICR12. 
ICR is a common procedure for patients with colon cancer involving the cecum and ascending colon, and it is becoming increasingly recognized that the host-response to surgery likely contributes to both local and distant tumor recurrence13. Despite this observation, models of ICR have not been utilized for the study of colorectal cancer and post-operative recurrence. Understanding both the systemic and local immunologic changes resulting from ICR will be important in investigating future therapies. Potential pathways involved in cancer recurrence post ICR include up regulation of growth factors, which may rescue cells from apoptosis and stimulate proliferation, mechanical tumor disruption with cell shedding, and loss of immune surveillance through post-operative immunosuppression13,14. 
Mouse models of ICR have the potential to be a powerful tool for the investigation of short bowel syndrome, Crohn&#8217;s disease, and colon cancer. They may also provide lessons on how to prevent early post-operative anastomotic complications by further defining the cellular and biochemical pathways involved in healing the newly constructed anastomosis. A major barrier in utilizing the murine ICR model is the technical difficulty. The intestinal anastomosis requires the use of 8-0 or 9-0 suture, an operating microscope, and training in microsurgical techniques. The goal of this article is to provide clear instructions on how to perform ICR in mice with the goal of utilizing this procedure in models of disease.

<table><tbody><tr><td>LD101 liquid rodent diet</td><td>testdiet.com</td><td></td><td></td></tr><tr><td>0.9% NaCl</td><td>Baxter</td><td>FKE1324</td><td>Injection quality saline</td></tr><tr><td>Operating Microscope</td><td>Ziess</td><td></td><td></td></tr><tr><td>Isoflurane Anesthetic Vaporizer</td><td>Harvard Apparatus</td><td>34-0483</td><td></td></tr><tr><td>Isoflurane</td><td>Abbott&amp;nbsp;</td><td>05260-05</td><td></td></tr><tr><td>Glass plate</td><td></td><td></td><td>For operating surface</td></tr><tr><td>Cotton swabs</td><td></td><td></td><td></td></tr><tr><td>Micro Castroviejo Needle holder, curved</td><td>World Precision Instruments</td><td>503377</td><td></td></tr><tr><td>Castroviejo straight scissors</td><td>World Precision Instruments</td><td>555530S</td><td></td></tr><tr><td>Dissecting Scissors</td><td>World Precision Instruments</td><td>15922</td><td></td></tr><tr><td>Dressing Forceps x 2</td><td>World Precision Instruments</td><td>500363</td><td></td></tr><tr><td>5-0 silk pre-cut sutures</td><td>Ethicon</td><td>A182H</td><td>For vessel ligation</td></tr><tr><td>8-0 Prolene on BV130-5 needle</td><td>Ethicon</td><td>8732H</td><td>For anastomosis</td></tr><tr><td>3-0 Silk on FS-2 needls</td><td>Ethicon</td><td>8665G</td><td>For abdominal wall closure</td></tr><tr><td>Petroleum Jelly</td><td>Vaseline</td><td></td><td></td></tr><tr><td>10 ml syringe</td><td>BD biosciences</td><td></td><td></td></tr><tr><td>Povidone-iodine 7.5% surgical Scrub</td><td>&lt;a href=&quot;http://betadine.com&quot;&gt;betadine.com&lt;/a&gt;</td><td></td><td></td></tr><tr><td>Heat lamps</td><td></td><td></td><td></td></tr><tr><td>buprenorphine 0.3 mg/ml</td><td>Reckitt Benckiser Healthcare Ltd.&amp;nbsp;</td><td>PL36699/0006</td><td></td></tr></tbody></table>

murine ileocolic bowel resection with primary anastomosis

Intestinal resections are frequently required for treatment of diseases involving the gastrointestinal tract, with Crohn&#8217;s disease and colon cancer being two common examples. Despite the frequency of these procedures, a significant knowledge gap remains in describing the inherent effects of intestinal resection on host physiology and disease pathophysiology. This article provides detailed instructions for an ileocolic resection with primary end-to-end anastomosis in mice, as well as essential aspects of peri-operative care to maximize post-operative success. When followed closely, this procedure yields a 95% long-term survival rate, no failure to thrive, and minimizes post-operative complications of bowel obstruction and anastomotic leak. The technical challenges of performing the procedure in mice are a barrier to its wide spread use in research. The skills described in this article can be acquired without previous surgical experience. Once mastered, the murine ileocolic resection procedure will provide a reproducible tool for studying the effects of intestinal resection in models of human disease.

Las tasas de mortalidad y el cambio de peso después de la operación. Las tasas de mortalidad siguientes ICR en 129S1 ratones de tipo salvaje son generalmente ~ 5%. La causa más común de la moral es la obstrucción intestinal en la anastomosis. Otras causas de la mortalidad incluyen fuga anastomótica y hernia interna que conduce a la obstrucción intestinal. La pérdida de peso se puede ver hasta 14 días después de la operación, pero generalmente no es significativa. L...

Watch this Scientific Journal Video about Murine Ileocolic Bowel Resection with Primary Anastomosis at JoVE.com

Murine Ileocolic Bowel Resection with Primary Anastomosis

Ileocolic resection is commonly performed in several human diseases; however, little is known regarding the impact of intestinal resection on surgical illnesses. This article provides instruction on executing the procedure in mice with high success, providing a means to study the effects of ileocolic resection in models of disease.

Murino ileocólica Resección intestinal con anastomosis primaria

Intestinal resections are frequently required for treatment of diseases involving the gastrointestinal tract, with Crohn&#8217;s disease and colon cancer ...

murine-ileocolic-bowel-resection-with-primary-anastomosis

Research

JoVE Journal

Medicine

16.3K vistas.  University of Alberta. Ileocolic resection is commonly performed in several human diseases; however, little is known regarding the impact of intestinal resection on surgical illnesses. This article provides instruction on executing the procedure in mice with high success, providing a means to study the effects of ileocolic resection in models of disease.

Video: Murine Ileocolic Bowel Resection with Primary Anastomosis

Small Bowel Transplantation In Mice

Since 1990, the development of tacrolimus-based immunosuppression and improved surgical techniques, the increased array of potent immunosuppressive medications, infection prophylaxis, and suitable patient selection helped improve actuarial graft and patient survival rates for all types of intestine transplantation. Patients with irreversible intestinal failure and complications of parenteral nutrition should now be routinely considered for small intestine transplantation. However, Survival rates for small intestinal transplantation have been slow to improve compares increasingly favorably with renal, liver, heart and lung. The small bowel transplantation is still unsatisfactory compared with other organs. Further progress may depend on better understanding of immunology and physiology of the graft and can be greatly facilitated by animal models. A wider use of mouse small bowel transplantation model is needed in the study of immunology and physiology of the transplantation gut as well as efficient methods in diagnosing early rejection. However, this model is limited to use because the techniques involved is an extremely technically challenging. We have developed a modified technique. When making anastomosis of portal vein and inferior vena cava, two stay sutures are made at the proximal apex and distal apex of the recipient s inferior vena cava with the donor s portal vein. The left wall of the inferior vena cava and donor s portal vein is closed with continuing sutures in the inside of the inferior vena cava after, after one knot with the proximal apex stay suture the right wall of the inferior vena cava and the donor s portal vein are closed with continuing sutures outside the inferior vena cave with 10-0 sutures. This method is easier to perform because anastomosis is made just on the one side of the inferior vena cava and 10-0 sutures is the right size to avoid bleeding and thrombosis.  In this article, we provide details of the technique to supplement the video.

The mouse small bowel transplantation model has been recognized as an important tool to study mechanismes of immune rejection and screen new immunosuppressive drugs. However, this model is limited to use because the techniques involved is an extremely technically challenge. Now we introduce the modified technique.

Trasplante de intestino delgado en ratones

Since 1990, the development of tacrolimus-based immunosuppression and improved surgical techniques, the increased array of potent immunosuppressive ...

Investigación

Biología

Ileectomy-induced Bile Overaccumulation in Mouse Intestine

Intestinal resection is a common therapeutic approach for human diseases such as obesity, inflammatory bowel disease, Crohn's disease, and colon cancer that often results in severe short bowel syndrome-like adverse effects including bile acid diarrhea, dehydration, electrolyte disturbances, and nutrient malabsorption. Here we introduce a murine ileal resection model, termed ileectomy, to evaluate tissue communication and the maintenance of systemic homeostasis. After ileal resection, circulating blood is permanently devoid of the ileum-specific endocrine hormone fibroblast growth factor 15 (FGF15), which releases its endocrinal inhibition of bile acid synthesis in the liver. In combination with the increased production and abolished reabsorption of bile acids after removing the ileum, mice that underwent surgery suffer from bile salt overaccumulation in the intestine and associated diarrhea, morbidity, and mortality. Novel usage of the surgery model introduced in this study may provide mechanistic and functional insights into ileal control of systemic metabolic regulation in physiology and disease.

Small intestine-dependent bile acid reabsorption and feedback inhibition of hepatic bile acid synthesis is important for systemic homeostasis and health. In this study, we describe a mouse model for ileal resection to evaluate ileectomy-induced bile malabsorption, overaccumulation, and toxicity in mouse intestine.

Sobreacumulación de Ileectomy inducida por bilis en intestino de ratón

Intestinal resection is a common therapeutic approach for human diseases such as obesity, inflammatory bowel disease, Crohn's disease, and colon cancer ...

Medicina

Murine Distal Colostomy, A Novel Model of Diversion Colitis in C57BL/6 Mice

Diversion colitis (DC) is a frequent clinical condition occurring in patients with bowel segments excluded from the fecal stream as a result of a diverting enterostomy. The etiology of this disease remains ill-defined but appears to differ from that of classical inflammatory bowel diseases such as Crohn's disease and ulcerative colitis. Research aimed to decipher the pathophysiological mechanisms leading to the development of this disease has been severely hampered by the lack of an appropriate murine model. This protocol generates a murine model of DC that facilitates the study of the immune system's role and its interaction with the microbiome in the development of DC. In this model using C57BL/6 animals, distal parts of the colon are excluded from the fecal stream by creating a distal colostomy, triggering the development of mild to moderate inflammation in the excluded bowel segments and reproducing the hallmark lesions of human DC with a moderate systemic inflammatory response. In contrast to the rat model, a large number of genetically-modified murine models on the C57BL/6 background are available. The combination of these animals with our model allows the potential roles of individual cytokines, chemokines, or receptors of bioactive molecules (e.g., interleukin (IL)-17; IL-10, chemokine CXCL13, chemokine receptors CXCR5 and CCR7, and the sphingosine-1-phosphate receptor 4) to be assessed in the pathogenesis of DC. The availability of congenic mouse strains on the C57BL/6 background largely facilitates transfer experiments to establish the roles of distinct cell types involved in the etiology of DC. Finally, the model offers the opportunity to assess the influences of local interventions (e.g., modification of the local microbiome or local anti-inflammatory therapy) on mucosal immunity in affected and non-affected bowel segments and the on systemic immune homeostasis.

Murine distal colostomy provides a murine model for human diversion colitis, a predominantly lymphocytic colitis in colon segment excluded from the fecal stream.

Murino colostomía Distal, un modelo novedoso de desvío Colitis en ratones C57BL/6

Diversion colitis (DC) is a frequent clinical condition occurring in patients with bowel segments excluded from the fecal stream as a result of a ...

Creation of Colonic Anastomosis in Mice

Intestinal anastomoses are commonly performed in both elective and emergent operations. Even so, anastomotic leaks are a highly feared complications of colonic surgeries and can occur in up to 26% of surgical anastomoses, with mortality being up to 39% for patients with such a leak. Currently, there remains a paucity of data detailing the cellular mechanisms of anastomotic healing. Devising preventative strategies and treatment modalities for anastomotic leak could be greatly potentiated by a better understanding of appropriate anastomotic healing.
A murine model is ideal as previous studies have shown that the murine anastomosis is the most clinically similar to the human case as compared with other animal models. We offer an easily reproducible murine model of colonic anastomosis in mice that will allow for further illustration of anastomotic healing.

Anastomotic leak or breakdown after surgery is a major cause of postoperative morbidity and mortality. Our surgery for creating a colonic anastomosis is a reliable and reproducible method for studying the healing mechanisms of anastomoses.

Creación de Anastomosis de colon en ratones

Intestinal anastomoses are commonly performed in both elective and emergent operations. Even so, anastomotic leaks are a highly feared complications of ...

Robotic Radical Cystectomy, Pelvic Lymph Node Dissection, and Intracorporeal Ileal Conduit Urinary Diversion

The robotic approach to radical cystectomy is compelling because of its oncologic equivalence to open radical cystectomy (ORC), its association with lower surgical blood loss, its potential association with shorter hospital stay after surgery. These factors suggest that the robotic approach to radical cystectomy may be an important component of enhanced recovery programs aimed at reducing surgical morbidity. This paper describes the importance of the cranial placement of robotic trocars, the use of Cadiere forceps for atraumatic bowel grasping, pelvic lymph node dissection (PLND), and utero-enteric anastomoses. Also discussed are steps that are critical for the successful outcome of RARC. In spite of the increased operating times and associated costs and the costs of robotic surgical platforms and equipment, adoption of the robotic technique by bladder cancer surgeons has increased. This paper describes a systematic and reproducible method that details robotic extended pelvic lymph node dissection, cystectomy/cystoprostatectomy, and intracorporeal ileal conduit urinary diversion.

This paper describes robotic radical cystectomy, pelvic lymph node dissection, and intracorporeal ileal conduit urinary diversion.

The robotic approach to radical cystectomy is compelling because of its oncologic equivalence to open radical cystectomy (ORC), its association with lower ...

<meta charset="utf8"></head><body>Modelo murino para el estudio del íleo postoperatorio mediante manipulación intestinal

Postoperative Ileus Murine Model

Most patients experience postoperative ileus (POI) after surgery, which is associated with increased morbidity, mortality, and hospitalization time. POI is a consequence of mechanical damage during surgery, resulting in disruption of motility in the gastrointestinal tract. The mechanisms of POI are related to aberrant neuronal sensitivity, impaired epithelial barrier function, and increased local inflammation. However, the details remain enigmatic. Therefore, experimental murine models are crucial for elucidating the pathophysiology and mechanism of POI injury and for the development of novel therapies.
Here, we introduce a murine model of POI generated via intestinal manipulation (IM) that is similar to clinical surgery; this is achieved by mechanical damage to the small intestine by massaging the abdomen 1-3 times with a cotton swab. IM delayed gastrointestinal transit 24 h after surgery, as assessed by FITC-dextran gavage and fluorescence detection of the segmental digestive tract. Moreover, tissue swelling of the submucosa and immune cell infiltration were investigated by hematoxylin and eosin staining and flow cytometry. Proper pressure of the IM and a hyperemic effect on the intestine are critical for the procedure. This murine model of POI can be utilized to study the mechanisms of intestinal damage and recovery after abdominal surgery.

<meta charset="utf8"></head><body>Modelo murino de íleo postoperatorio

We describe a murine model of postoperative ileus generated via intestinal manipulation. Gastrointestinal transit function, pathologic changes, and immune cell activation were assessed 24 h after surgery.

Modelo murino de íleo postoperatorio

Most patients experience postoperative ileus (POI) after surgery, which is associated with increased morbidity, mortality, and hospitalization time. POI ...

Inmunología e Infección

Robot-assisted Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection for Locally Advanced Middle-low Rectal Cancer

Since their approval for clinical use, da Vinci surgical robots have shown great advantages in gastrointestinal surgical operations, especially in complex procedures. The high-quality 3-D visual, multijoint arm and natural tremor filtration allow the surgeon to expose and dissect more accurately with minimal invasion. Total mesorectal excision is the standard surgical technique for the treatment of resectable rectal cancer. To reduce the lateral recurrence rate, lateral pelvic lymph node dissection can be performed, as it is a safe and feasible procedure for locally advanced middle-low rectal cancer with a high possibility of metastasis to the lateral lymph nodes. However, the complexity of the anatomic structures and the high postoperative complication rate limit its application. Recently, several surgeons have increasingly used robotic techniques for total mesorectal excision and lateral pelvic lymph node dissection. Compared with open and laparoscopic surgery, the robotic technique has several advantages, such as less blood loss, fewer blood transfusions, minimal trauma, shorter postoperative hospitalization, and quicker recovery. A robotic approach is generally regarded as a reasonable alternative for complicated procedures such as lateral pelvic lymph node dissection, although there are a limited number of high-quality prospective randomized controlled studies reporting direct evidence. Here, we provide the detailed steps of robot-assisted total mesorectal excision and lateral pelvic lymph node dissection performed at the First Affiliated Hospital of Xi&#39;an Jiaotong University.

The robotic technique described herein aims to detail a stepwise approach to robot-assisted total mesorectal excision and lateral pelvic lymph node dissection for locally advanced (T3/T4) rectal cancer located below the peritoneal reflection.

Escisión mesorrectal total asistida por robot y disección lateral de ganglios linfáticos pélvicos para el cáncer de recto medio-bajo localmente avanzado

Since their approval for clinical use, da Vinci surgical robots have shown great advantages in gastrointestinal surgical operations, especially in complex ...

Single-Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy Model in Mice

Obesity is a major health issue worldwide. As a response, bariatric surgeries have emerged to treat obesity and its related comorbidities (e.g., diabetes mellitus, dyslipidemia, non-alcoholic steatohepatitis, cardiovascular events, and cancers) through restrictive and malabsorptive mechanisms. Understanding the mechanisms by which these procedures allow such improvements often require their transposition into animals, especially in mice, because of the ease of generating genetically modified animals. Recently, the single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) has emerged as a procedure that uses both restrictive and malabsorptive effects, which is being used as an alternative to gastric bypass in case of major obesity. Thus far, this procedure has been associated with strong metabolic improvements, which has led to a marked increase in its use in daily clinical practice. However, the mechanisms underlying these metabolic effects have been poorly studied as a result of a lack of animal models. In this article, we present a reliable and reproducible model of SADI-S in mice, with a special focus on perioperative management. The description and use of this new rodent model will be helpful for the scientific community to better understand the molecular, metabolic, and structural changes induced by the SADI-S and to better define the surgical indications for clinical practice.

Single-anastomosis duodeno-ileal bypass (SADI-S) is an emerging bariatric procedure with important metabolic effects. In this article, we present a reliable and reproducible model of SADI-S in mice.

Bypass duodeno-ileal de anastomosis única con modelo de gastrectomía en manga en ratones

Obesity is a major health issue worldwide. As a response, bariatric surgeries have emerged to treat obesity and its related comorbidities (e.g., diabetes ...

Murino ileocólica Resección intestinal con anastomosis primaria

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Trasplante de intestino delgado en ratones

Sobreacumulación de Ileectomy inducida por bilis en intestino de ratón

Murino colostomía Distal, un modelo novedoso de desvío Colitis en ratones C57BL/6

Creación de Anastomosis de colon en ratones

Robotic Radical Cystectomy, Pelvic Lymph Node Dissection, and Intracorporeal Ileal Conduit Urinary Diversion

Modelo murino de íleo postoperatorio

Modelo murino de íleo postoperatorio

Modelo murino de íleo postoperatorio

Escisión mesorrectal total asistida por robot y disección lateral de ganglios linfáticos pélvicos para el cáncer de recto medio-bajo localmente avanzado

Bypass duodeno-ileal de anastomosis única con modelo de gastrectomía en manga en ratones