Active clinical trials for "Fistula"

The primary goal of this quality improvement project is to find the optimal surgical conditions for patients undergoing upper arm arteriovenous graft surgery. Currently, there are two anesthetic techniques used in clinical practice. The goal is to standardize future practice and improve the care of patients postoperatively. The two techniques used in conjunction with a brachial plexus block are paravertebral nerve block and subcutaneous infiltration.

To determine if cutting balloon angioplasty combined with DEB angioplasty provides a higher primary patency after treatment of recurrent stenoses compared with cutting balloon angioplasty or angioplasty using DEB alone in the venous outflow AVFs. For cutting balloon angioplasty in venous stenosis, the primary patency after 12 months is 55-60% (9,16) and in recurrent stenoses up to 48%(10). We hypothesise that DEB angioplasty after cutting balloon angioplasty leads to improved primary patency at 12 months.

This study investigated the cellular and molecular characteristics of AT-MSCs obtained from autologous AT therapy in patients with high transphincteric perianal fistulas of crytoglandular origin. Adipose tissue was injected into anal fistulas. Characteristics of adipose tissue mesenchymal stemcells (AT-MSC) was investigated and compared in patients with fistula that healed after the treatment (responders) to patients who failed to heal (non-responders)

The aim of this study is to describe a modified surgical approach for the closure of oral sinus communications, using a buccal trapezoidal flap combined with a connective pedicle flap rotated from the palate

The CLARITY study is a clinical trial approved by US FDA to study the removal of the Evolution® Esophageal Stent-Fully Covered in malignant and benign indications.

Dialysis access, which is the connection that allows blood to flow in and out of the body during dialysis sessions, is important to remove wastes and excess fluid for patients with end stage renal disease (ESRD). One method used to access the vein and artery for dialysis is called a brachiocephalic fistula. Patients are being asked to participate in this study because they have endstage renal disease, and their doctor has recommended that they will have brachiocephalic fistula placed for their dialysis access. A common problem seen in patients with a brachiocephalic fistula (BCF) is cephalic arch stenosis (CAS). CAS is a narrowing in the central vein (located in the upper chest). CAS causes problems with the opening of the veins and arteries needed for dialysis. Once someone suffers CAS they may need several radiology procedures as well as surgery to help correct the problem. The BCF may fail once CAS develops. The purpose of the research study is to gather information about the BCF and what is happening inside the vein. The researchers hope to find out what may be the cause of CAS.

Pancreaticoduodenectomy (PD)is the treatment of choice for patients with periampullary tumour (benign or malignant). In the recent years, the mortality rate of PD has decreased to 5% in many centers. However, pancreatic fistula (POPF) still occurs in 5 % to 40% of patients after PD. The hypothesis that isolated Roux loop PJ with isolated pancreatic drainage decrease the incidence of PF and severity with preservation of pancreatic function. So the investigators compare isolated Roux Loop Pancreaticojejunostomy (PJ) Versus Pancreaticogastrostomy (PG) as regards incidence of POPF, severity of POPF and functional outcome.

A. Pain and other disadvantages of AV fistula cannulation can be limited by using the so-called buttonhole technique. B. Till present in our center catheters with cylindrical points are used for cannulation of AV fistulas with the rope ladder technique. One can hypothesize that a catheter with a bevel point might have some advantages such as a larger entrance area and less traumatic cannulation. The latter may influence pain sensation of the patients. The above background information gives rise to the following investigational questions: A. Buttonhole vs rope ladder technique Is pain sensation different when using buttonhole cannulation as compared to rope ladder cannulation technique? Hypothesis: AV fistula cannulation by buttonhole technique causes less pain than cannulation by rope ladder technique. Is the level of anxiety different when using buttonhole cannulation as compared to rope ladder cannulation technique? Hypothesis: AV fistula cannulation by buttonhole technique causes less anxiety than cannulation by rope ladder technique. Is bleeding time different when using buttonhole cannulation as compared to rope ladder cannulation technique? Hypothesis: Bleeding time is shorter when using buttonhole technique versus rope ladder technique. Is the number and severity of complications related to AV fistula cannulation different between buttonhole and rope ladder technique? Hypothesis: When using the buttonhole technique for AV fistula cannulation the number and severity of complications is less than when using the rope ladder technique. B. Rope ladder technique using catheters with cylindrical vs. bevel point Is pain sensation different when using rope ladder cannulation catheters with cylindrical as compared to bevel point? Hypothesis: AV fistula cannulation using bevel point catheters causes less pain than cannulation using cylindrical point catheters.

The purpose of this study is to determine whether the outcome of anal fistula repair with a collagen plug is comparable to that of repair by a mucosal advancement flap.

Postoperative pancreatic fistula (POPF) is a major complication and an important cause of mortality after pancreaticoduodenectomy (PD). Trans-nasal afferent loop decompression technique (TNALD) may reduce the rate of POPF based on our previous retrospective study. The aim of this open-label randomized controlled trial is to determine whether TNALD is a protective factor against the development of POPF after PD.