1. Rat biliäre Anatomie Die durchschnittliche Gallengang Durchmesser und die Länge war 1 mm und 29 mm. Der durchschnittliche Abstand zwischen den Pylorus und die Papilla betrug 28 mm. Es gibt zwei wesentliche Bauchspeicheldrüsengänge die in den Gallengang offen - die vordere mündet auf der linken Seite und der hinteren mündet auf der rechten Seite. Neben diesen großen Kanälen, eine Reihe von kleineren Kanälen, die alle drei Teile der Bauchspeicheldrüse Drainage direkt öffnen, um den Gallengang. 6 2. Technik Alle Tierexperimente wurden in Übereinstimmung mit den National Institutes of Health Richtlinien für ethische Forschung durchgeführt und wurden von der Institution Research Committee und Animal Care Committee genehmigt. Männliche Sprague-Dawley-Ratten im Alter von 8 Wochen wurden für diese Demonstration verwendet. Die Ratten wurden von Charles River Laboratories in Wilmington, MA, und alle waren mehr als 300 Gramm erhalten. Ratten hatten Zugang zu Standard-Labor-Diät und wurden in Standard-Laborbedingungen untergebracht. Die Ratten wurden zunächst betäubt mit Isofluoran und hielt unter Narkose während der Operation mit Isofluoran durch eine Maske. Ein Mittellinienschnitt von 2 cm wurde ab dem xiphisternum. Nachdem die Faszie eröffnet wurde, die Leberlappen kranial wurden mit einer Sen Retraktor eingefahren, und der Zwölffingerdarm wurde zurückgezogen kaudal mit Q-Tips. Der Gallengang wurde als eine röhrenförmige Struktur in das Duodenum identifiziert. Der Gallengang wurde unter Spannung gesetzt und teilweise aufgeschnitten. Eine sterile 5 cm langen Polyethylen-Rohr mit einem Innendurchmesser von 0,6 mm und einem Außendurchmesser von 0,9 mm verwendet wurde. Ein Ende dieser Röhre war heiß versiegelt und das andere Ende wurde leicht abgeschrägt. Das abgeschrägte Ende wurde dann in den Gallengang weitergegeben. Dies war in Ort mit 8-0 Nylon Fäden sowohl proximal und distal der Eröffnung in den Gallengang gesichert. Die restlichen Rohr zusammen mit dem verschlossenen Ende war in der Bauchhöhle platziert. Die operative Seite wurde mit physiologischer Kochsalzlösung gespült. Der Bauch wurde dann in 2 Schichten geschlossen, mit 4-0 Polyglactin Naht. Die Linea alba wurde mit kontinuierlichen Nähten verschlossen und die unterbrochene dermale Nähte wurden platziert. Hautleim wurde dann auf die Haut aufgetragen. Die Ratten durften unter Standard-Laborbedingungen mit täglich Körpergewicht Überwachung wieder auf ausreichende Flüssigkeitszufuhr zu gewährleisten. Für die Cholestase Umkehr Operation wurden die Ratten mit Isofluoran wie zuvor beschrieben. Der Unterleib war in den vergangenen Inzisionsstelle eröffnet. Das Rohr wurde identifiziert und aus der Bauchhöhle entnommen. Netzadhäsionen um das Rohr frei werden mit stumpfen und scharfen Dissektion. Eine Website in den Zwölffingerdarm wurde dann für eine komfortable Positionierung des Duodenostomie Rohr identifiziert. Eine Tabaksbeutelnaht, 2-3 mm im Durchmesser, wurde dann platziert mit 8-0 Nylon. Das Duodenum wurde dann in diesem Tabaksbeutelnaht eröffnet. Die versiegelte Ende des Rohres wurde dann auf entsprechende Länge geschnitten. Freier Fluss der Galle wurde sichergestellt. Das Ende des Rohres wurde dann in den Zwölffingerdarm gelegt und die Tabaksbeutelnaht wurde verschärft. Der Bauch war bewässert und in Schichten verschlossen. In einer früheren Studie, wobei Choledochoduodenostomie wurde unter Verwendung einer anderen Technik wurden die Ratten 12 Wochen lang überlebte und die Ratten wurden während dieser Zeit gesund. Auch diese Studie bestätigt die Umkehrung der biochemischen und histologischen Veränderungen nach Choledochoduodenostomie in Ratten, die zur Obstruktion des Gallengangs für einen Zeitraum von 2 Wochen. 7

<ol>
	<li>Gouma, D. J., Roughneen, P. T., Kumar, S., Moody, F. G., Rowlands, B. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Changes+in+nutritional+status+associated+with+obstructive+jaundice+and+biliary+drainage+in+rats.">Changes in nutritional status associated with obstructive jaundice and biliary drainage in rats.</a> Am J Clin Nutr. 44, 362-369 (1986).</li><li>Ohtsuka, M., Miyazaki, M., Kondo, Y., Nakajima, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neutrophil-mediated+sinusoidal+endothelial+cell+injury+after+extensive+hepatectomy+in+cholestatic+rats.">Neutrophil-mediated sinusoidal endothelial cell injury after extensive hepatectomy in cholestatic rats.</a> Hepatology. 25, 636-641 (1997).</li><li>Abe, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Kupffer+cell-derived+interleukin+10+is+responsible+for+impaired+bacterial+clearance+in+bile+duct-ligated+mice.">Kupffer cell-derived interleukin 10 is responsible for impaired bacterial clearance in bile duct-ligated mice.</a> Hepatology. 40, 414-423 (2004).</li><li>Saiki, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preoperative+internal+biliary+drainage+is+superior+to+external+biliary+drainage+in+liver+regeneration+and+function+after+hepatectomy+in+obstructive+jaundiced+rats.">Preoperative internal biliary drainage is superior to external biliary drainage in liver regeneration and function after hepatectomy in obstructive jaundiced rats.</a> Ann Surg. 230, 655-662 (1999).</li><li>Subhas, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Protective+effect+of+methylprednisolone+on+warm+ischemia-reperfusion+injury+in+a+cholestatic+rat+liver.">Protective effect of methylprednisolone on warm ischemia-reperfusion injury in a cholestatic rat liver.</a> Am J Surg. 199, 377-380 (2010).</li><li>Kara, M. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+anatomical+study+on+the+rat+pancreas+and+its+ducts+with+emphasis+on+the+surgical+approach.">The anatomical study on the rat pancreas and its ducts with emphasis on the surgical approach.</a> Ann Anat. 187, 105-112 (2005).</li><li>Ryan, C. J., Than, T., Blumgart, L. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Choledochoduodenostomy+in+the+rat+with+obstructive+jaundice.">Choledochoduodenostomy in the rat with obstructive jaundice.</a> J Surg Res. 23, 321-331 (1977).</li></ol>

Cholestase führt zu einer Vielzahl von Veränderungen im Magen-Darm-System. Es wurden Studien durchgeführt suchen die Veränderungen im Immunsystem und Ernährungszustand. 1-3 Cholestase kann die Ergebnisse der Leber-Operationen zu beeinflussen. Es wurden Studien durchgeführt, um die Ergebnisse der Leber-Operationen in der Gegenwart von Cholestase zu verbessern. 4-5 Mit Verbesserungen in Medizin und Forschung, werden weitere Untersuchungen zur Cholestase durchgeführt werden. Daher ist es notwen...

creation of reversible cholestatic rat model

Cholestase ist ein klinischer Zustand häufig von Chirurgen und Gastroenterologen gestoßen. Cholestase kann verschiedene physiologische Veränderungen und Auswirkungen auf den Ernährungszustand und chirurgische Ergebnisse. Studium der pathophysiologischen Veränderungen in der Leber und andere Organe von Bedeutung ist. Verschiedene Studien haben in cholestatischen Ratten-Modellen getan. Wir verwendeten eine reversible cholestatische Rattenmodell in unserer jüngsten Studie, die die Rolle von Methylprednisolon in der Ischämie Reperfusion. Verschiedene Techniken zur Schaffung eines reversible cholestatische Modell beschrieben worden. Erstellung eines reversible cholestatische Rattenmodell kann in Anbetracht der geringeren Größe und einzigartige hepatopancreatobiliary Anatomie in Ratten eine Herausforderung sein. Dieses Video Artikel veranschaulicht die Schaffung eines reversible cholestatische Modell. Dieses Modell kann in verschiedenen Studien, wie z. B. Blick auf die Veränderungen in Ernährung, physiologischen, pathologischen, histologischen und immunologischen Veränderungen im Gastrointestinaltrakt eingesetzt werden. Dieses Modell kann auch verwendet werden, um die Auswirkungen der Cholestase und verschiedene therapeutische Interventionen am wichtigsten hepatischen Operationen zu sehen.

Watch this Scientific Journal Video about Creation of Reversible Cholestatic Rat Model at JoVE.com

Creation of Reversible Cholestatic Rat Model

Cholestase ist ein klinischer Zustand häufig von Chirurgen und Gastroenterologen gestoßen. Erstellung eines reversible cholestatische Rattenmodell kann in Anbetracht der geringeren Größe und einzigartige hepatopancreatobiliary Anatomie in Ratten eine Herausforderung sein. Dieses Video Artikel veranschaulicht die Schaffung eines reversible cholestatische Modell.

Erstellung von Reversible Cholestatische Rattenmodell

Cholestasis is a clinical condition commonly encountered by both surgeons and gastroenterologists. Cholestasis can cause various physiological changes and ...

creation-of-reversible-cholestatic-rat-model

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14.9K Aufrufe.  Providence Hospital and Medical Centers. Cholestase ist ein klinischer Zustand häufig von Chirurgen und Gastroenterologen gestoßen. Erstellung eines reversible cholestatische Rattenmodell kann in Anbetracht der geringeren Größe und einzigartige hepatopancreatobiliary Anatomie in Ratten eine Herausforderung sein. Dieses Video Artikel veranschaulicht die Schaffung eines reversible cholestatische Modell.

Serie: Creation of Reversible Cholestatic Rat Model

Ascending Aortic Constriction in Rats for Creation of Pressure Overload Cardiac Hypertrophy Model

Ascending aortic constriction is the most common and successful surgical model for creating pressure overload induced cardiac hypertrophy and heart failure. Here, we describe a detailed surgical procedure for creating pressure overload and cardiac hypertrophy in rats by constriction of the ascending aorta using a small metallic clip. After anesthesia, the trachea is intubated by inserting a cannula through a half way incision made between two cartilage rings of trachea. Then a skin incision is made at the level of the second intercostal space on the left chest wall and muscle layers are cleared to locate the ascending portion of aorta. The ascending aorta is constricted to 50&#8211;60% of its original diameter by application of a small sized titanium clip. Following aortic constriction, the second and third ribs are approximated with prolene sutures. The tracheal cannula is removed once spontaneous breathing was re-established. The animal is allowed to recover on the heating pad by gradually lowering anesthesia. The intensity of pressure overload created by constriction of the ascending aorta is determined by recording the pressure gradient using trans-thoracic two dimensional Doppler-echocardiography. Overall this protocol is useful to study the remodeling events and contractile properties of the heart during the gradual onset and progression from compensated cardiac hypertrophy to heart failure stage.

We describe a stepwise procedure for creating pressure overload and left ventricular hypertrophy in Wistar rats by constriction of the ascending aorta using a small metallic clip. This model is extensively used for studying remodeling changes during cardiac hypertrophy and for identifying and evaluating strategies for regression of such changes.

Aufsteigend Aortakonstriktion bei Ratten zur Erstellung von Drucküberlast Herzhypertrophie Modell

Ascending aortic constriction is the most common and successful surgical model for creating pressure overload induced cardiac hypertrophy and heart ...

Forschung

Medizin

A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction

Obstruction of the kidney may affect native or transplanted kidneys and results in kidney injury and scarring. Presented here is a model of obstructive nephropathy induced by unilateral ureteric obstruction (UUO), which can either be irreversible (UUO) or reversible (R-UUO). In the irreversible UUO model, the ureter may be obstructed for variable periods of time in order to induce increasingly severe renal inflammation and interstitial fibrotic scarring. In the reversible R-UUO model the ureter is obstructed to induce hydronephrosis, tubular dilation and inflammation. After a suitable period of time the ureteric obstruction is then surgically reversed by anastomosis of the severed previously obstructed ureter to the bladder in order to allow complete decompression of the kidney and restoration of urinary flow to the bladder. The irreversible UUO model has been used to investigate various aspects of renal inflammation and scarring including the pathogenesis of disease and the testing of potential anti-inflammatory or anti-fibrotic therapies. The more challenging model of R-UUO has been used by some investigators and does offer significant research potential as it allows the study of inflammatory and immune processes and tissue remodeling in an injured and scarred kidney following the removal of the injurious stimulus. As a result, the R-UUO model offers investigators the opportunity to explore the resolution of kidney inflammation together with key aspects of tissue repair. These experimental models are of relevance to human disease as patients often present with obstruction of the renal tract that requires decompression and are commonly left with significant residual kidney impairment that has no current treatment options and may lead to eventual end stage kidney failure.

The murine model of irreversible unilateral ureteric obstruction (UUO) is presented together with the model of reversible UUO in which the ureteric obstruction is relieved by anastomosis of the severed ureter into the bladder. These models enable the study of renal inflammation and scarring as well as tissue remodeling.

Ein Mausmodell der irreversiblen und reversiblen Einseitige Ureterobstruktion

Obstruction of the kidney may affect native or transplanted kidneys and results in kidney injury and scarring. Presented here is a model of obstructive ...

Creation of Abdominal Adhesions in Mice

Abdominal adhesions consist of fibrotic tissue that forms in the peritoneal space in response to an inflammatory insult, typically surgery or intraabdominal infection. The precise mechanisms underlying adhesion formation are poorly understood. Many compounds and physical barriers have been tested for their ability to prevent adhesions after surgery with varying levels of success. The mouse and rat are important models for the study of abdominal adhesions. Several different techniques for the creation of adhesions in the mouse and rat exist in the literature. Here we describe a protocol utilizing abrasion of the cecum with sandpaper and sutures placed in the right abdominal sidewall. The mouse is anesthetized and the abdomen is prepped. A midline laparotomy is created and the cecum is identified. Sandpaper is used to gently abrade the surface of the cecum. Next, several figure-of-eight sutures are placed into the peritoneum of the right abdominal sidewall. The abdominal cavity is irrigated, a small amount of starch is applied, and the incision is closed. We have found that this technique produces the most consistent adhesions with the lowest mortality rate.

Abdominal adhesions that form after surgery are a major cause of pain, infertility, and hospitalization and reoperation for small bowel obstruction. Our surgical procedure for creating abdominal adhesions in mice is a reliable tool to study the mechanisms underlying the formation of adhesions.

Erstellung von Verwachsungen bei Mäusen

Abdominal adhesions consist of fibrotic tissue that forms in the peritoneal space in response to an inflammatory insult, typically surgery or ...

Creation of a Rodent Model of Abdominal Aortic Aneurysm by Blocking Adventitial Vasa Vasorum Perfusion

The adventitial vasa vasorum (VV) provides oxygen and nourishment to the aortic wall. Hypoxia in the aortic wall can cause enlarged abdominal aortic aneurysms (AAAs). This article introduces and describes a standard protocol used to induce AAAs through adventitial VV hypoperfusion created with a combination of polyurethane catheter insertion into the aortic lumen and suture ligation of the infrarenal abdominal aorta.
The protocol involves the use of male rats weighing 300-400 g, which are provided food and water ad libitum. After laparotomy with a ventral midline abdominal incision, exfoliation of the aorta is performed, which blocks blood flow from the perivascular tissue. Aortotomy involving a small incision adjacent to the renal artery branches is performed, and a polyurethane catheter is inserted using an 18-gauge indwelling needle. After repairing the incision, tight ligation of the aorta over the catheter blocks VV blood flow from the proximal direction through the aortic wall without disturbing the aortic blood flow. This technique can induce an AAA with progressive aortic dilatation.
The greatest benefit of this model is that VV hypoperfusion causes tissue hypoxia and the development of an infrarenal AAA, which has morphological and pathological characteristics similar to those of a human AAA.

Polyurethane catheter insertion into the aortic lumen and suture ligation of the aorta induce chronic hypoxia due to hypoperfusion of the adventitial vasa vasorum. This article describes a novel animal model of abdominal aortic aneurysm (AAA) with characteristics similar to those of AAA in humans.

Erstellung eines Nagetier Modells der abdominalen Aortenaneurysma Vaskulogenese Adventitial Vasa Vasorum Perfusion

The adventitial vasa vasorum (VV) provides oxygen and nourishment to the aortic wall. Hypoxia in the aortic wall can cause enlarged abdominal aortic ...

Isometric Contractility Measurement of the Mouse Mesenteric Artery Using Wire Myography

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and drugs. It is widely used in many studies on the physiological functions of vascular smooth muscle, the pathogenesis of vascular diseases such as hypertension, and the development of smooth muscle relaxant drugs. The mouse is a widely used model animal with a large pool of disease models and genetically modified strains. We introduced this method to measure the isometric contraction of mouse mesenteric artery in detail. A 1.4-mm segment of mouse mesenteric resistance artery was isolated and mounted on a myograph chamber by passing two steel wires through its lumen. After equilibration and normalization steps, the vessel segment was potentiated by a high-K+ solution twice prior to the contraction assay. As an example of the application of this method in drug development, we measured the relaxant effect of a novel natural substance, neoliensinine, isolated from a Chinese herb, embryos of the lotus seed (Nelumbo nucifera Gaertn.) on mouse mesenteric arteries. The vessel segments mounted on the myograph chamber were stimulated with a high-K+ solution. When the force tension reached a stable sustained phase, cumulative doses of neoliensinine were added to the chamber. We found that neoliensinine had a dose-dependent relaxant effect on smooth muscle contraction, thus suggesting that it bears potential activity against hypertension. In addition, as the vessel segment can survive at least 4 hours after mounting and maintain contractility induced by the high-K+ solution for many times, we suggest that the wire myograph system may be used for the time-consuming process of drug screening.

The wire myograph technique is used to investigate vascular smooth muscle functions and screen new drugs. We report a detailed protocol for measuring the isometric contractility of the mouse mesenteric artery and for screening new relaxants of vascular smooth muscle.

Messung der isometrischen Kontraktilität der Maus mesenterialen Arterie mit Draht Myographie

The wire myograph technique is used to assess the contractility of vascular smooth muscles in response to depolarization, GPCR agonists/inhibitors and ...

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.

Erstellung von Kolon Anastomose bei Mäusen

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

A Reversible Silicon Oil-Induced Ocular Hypertension Model in Mice

Elevated intraocular pressure (IOP) is a well-documented risk factor for glaucoma. Here we describe a novel, effective method for consistently inducing stable IOP elevation in mice that mimics the post-operative complication of using silicone oil (SO) as a tamponade agent in human vitreoretinal surgery. In this protocol, SO is injected into the anterior chamber of the mouse eye to block the pupil and prevent inflow of aqueous humor. The posterior chamber accumulates aqueous humor and this in turn increases the IOP of the posterior segment. A single SO injection produces reliable, sufficient, and stable IOP elevation, which induces significant glaucomatous neurodegeneration. This model is a true replicate of secondary glaucoma in the eye clinic. To further mimic the clinical setting, SO can be removed from the anterior chamber to reopen the drainage pathway and allow inflow of aqueous humor, which is drained through the trabecular meshwork (TM) at the angle of the anterior chamber. Because IOP quickly returns to normal, the model can be used to test the effect of lowering IOP on glaucomatous retinal ganglion cells. This method is straightforward, does not require special equipment or repeat procedures, closely simulates clinical situations, and may be applicable to diverse animal species. However, minor modifications may be required.

Here, we present a protocol to induce ocular hypertension and glaucomatous neurodegeneration in mouse eyes by intracameral injection of silicone oil and the procedure for silicone oil removal from the anterior chamber to return elevated intraocular pressure to normal.

Ein reversibles Siliziumöl-induziertes Okularhypertonie-Modell bei Mäusen

Elevated intraocular pressure (IOP) is a well-documented risk factor for glaucoma. Here we describe a novel, effective method for consistently inducing ...

Acupuncture in a Rat Model of Asthma

A high platform can fix rats without restriction and completely expose the acupoints on the back during acupuncture manipulation. This article describes methods for the fabrication of the high platform, establishes a rat model of asthma and measures changes in respiratory function using a noninvasive and real-time whole-body plethysmography (WBP) system.

Akupunktur in einem Rattenmodell von Asthma

A high platform can fix rats without restriction and completely expose the acupoints on the back during acupuncture manipulation. This article describes ...

Retinal Pathophysiological Evaluation in a Rat Model

A posterior segment eye disease like diabetic retinopathy alters the physiology of the retina. Diabetic retinopathy is characterized by a retinal detachment, breakdown of the blood-retinal barrier (BRB), and retinal angiogenesis. An in vivo rat model is a valuable experimental tool to examine the changes in the structure and function of the retina. We propose three different experimental techniques in the rat model to identify morphological changes of retinal cells, retinal vasculature, and compromised BRB. Retinal histology is used to study the morphology of various retinal cells. Also, quantitative measurement is performed by retinal cell count and thickness measurement of different retinal layers. A BRB breakdown assay is used to determine the leakage of extraocular proteins from the plasma to vitreous tissue due to the breakdown of BRB. Fluorescence angiography is used to study angiogenesis and leakage of blood vessels by visualizing retinal vasculature using FITC-dextran dye.

Diabetic retinopathy is one of the leading causes of blindness. Histology, blood-retinal barrier breakdown assay, and fluorescence angiography are valuable techniques to understand the pathophysiology of the retina, which could further enhance the efficient drug screening against diabetic retinopathy.

Retinale pathophysiologische Bewertung in einem Rattenmodell

A posterior segment eye disease like diabetic retinopathy alters the physiology of the retina. Diabetic retinopathy is characterized by a retinal ...

Development of a Uterosacral Ligament Suspension Rat Model

Pelvic organ prolapse (POP) is a common pelvic floor disorder (PFD) with the potential to significantly impact a woman's quality of life. Approximately 10%-20% of women undergo pelvic floor repair surgery to treat prolapse in the United States. PFD cases result in an overall $26.3 billion annual cost in the United States alone. This multifactorial condition has a negative impact on the quality of life and yet the treatment options have only dwindled in the recent past. One common surgical option is uterosacral ligament suspension (USLS), which is typically performed by affixing the vaginal vault to the uterosacral ligament in the pelvis. This repair has a lower incidence of complications compared to those with mesh augmentation, but is notable for a relatively high failure rate of up to 40%. Considering the lack of standard animal models to study pelvic floor dysfunction, there is an urgent clinical need for innovation in this field with a focus on developing cost-effective and accessible animal models. In this manuscript, we describe a rat model of USLS involving a complete hysterectomy followed by fixation of the remaining vaginal vault to the uterosacral ligament. The goal of this model is to mimic the procedure performed on women to be able to use the model to then investigate reparative strategies that improve the mechanical integrity of the ligament attachment. Importantly, we also describe the development of an in situ tensile testing procedure to characterize interface integrity at chosen time points following surgical intervention. Overall, this model will be a useful tool for future studies that investigate treatment options for POP repair via USLS.

Pelvic organ prolapse affects millions of women worldwide and yet some common surgical interventions have failure rates as high as 40%. The lack of standard animal models to investigate this condition impedes progress. We propose the following protocol as a model for uterosacral ligament suspension and in vivo tensile testing.

Entwicklung eines uterosakralen Ligament-Suspensionsrattenmodells

Pelvic organ prolapse (POP) is a common pelvic floor disorder (PFD) with the potential to significantly impact a woman's quality of life. Approximately ...