Active clinical trials for "Fistula"

In 2019, KDOQI considered that uremic patients with a life expectancy of more than one year should require hemodialysis as an effective renal replacement therapy before preparation of kidney transplantation. Arteriovenous fistula, as the lifeline of uremic patients, plays an important role in their daily hemodialysis. The patency of arteriovenous fistula is largely restricted by the inflow artery. According to available medical literatures, an incidence rate of variations in the branching pattern of the main arteries in the upper limb is ranged from 7.2% to 25.0%. and there is a large difference in the incidence rate between sex and race, furthermore, the incidence rate of variations in the branching pattern of the main arteries in the upper limb of Chinese is still unclear. The brachial artery is the main artery of the upper limb. It gives off two terminal branches at the distal end of the elbow crease, the radial and ulnar arteries, the former one often serves as an arterial inflow to create an arteriovenous fistula in the forearm. High bifurcation of the brachial artery (HBBA) seems to be a common variation which may result in immaturity or disfunction of arteriovenous fistulas. Therefore, the purpose of this study is to investigate the variations in the branching pattern of the main arteries in the upper limb of Chinese, in order to study on the hemodynamic changes, and their influence on the establishment, maturation and failure of arteriovenous fistulas in the upper limb.

The use of mesenchymal stem cells is considered a novel and promising therapeutic option for patients with perianal fistulizing Crohn's disease. However, due to limited clinical data, this multicentre, nationwide study aimed to assess its clinical efficacy in closing complex anal fistula.

Recommended by the KDOQI vascular access guidelines, antebrachial arteriovenous fistula is the best primary vascular access for hemodialysis in patients with end stage renal disease. The primary complications are common, of the order of 10-36 %, including lack of maturation and dominated by stenosis and thrombosis. Local anesthesia associated with sedation is a validated method of anesthesia for made arteriovenous fistula but does not cause the motor block and not blocking vasospasm, deleterious to the surgery. Multiple injections necessary to cover the operating zone expose patient to pain and to intravascular injection of local anesthetics. Regional anesthesia provides better conditions for realize more distal fistula. Sympathetic block provides arterial, venous vasodilation and decreases the incidence of vasospasm . It enables an increased flow rate at an early time fistula and faster maturation. However, studies included low numbers of patient or are non-randomized. They cannot concluded a significant difference in the complication rate of arteriovenous fistula at an early time depending on the type of anesthesia . This study aims to demonstrate that axillary block for surgical creation of arteriovenous fistula allows a reduction of complications at 6 weeks compared to local anesthesia

Surgery is the principal treatment for benign and malignant pancreatic tumours. This surgery can be accompanied by complications among which the main one is pancreatic fistula, which leads to the flow of pancreatic juices into the abdominal cavity. Depending on its severity, a fistula can be managed medically, with the implantation of a la pose d'un percutaneous drain, endoscopic treatment, or revisit surgery. It has been shown that early management of the fistula prevents it from evolving towards major complications such as haemorrhage or serious intra-abdominal infections. To date, the early diagnosis of pancreatic fistula is based on high levels of one pancreatic enzyme, amylase, in the drains. However in certain clinical situations, patients present post-operative fistulas with no elevation of amylase. And, on the contrary, increased amylase with no clinical consequences. It is therefore necessary to identify another early early marker of pancreatic fistula that corresponds better to clinical signs. In a preliminary study conducted in 65 patients, the investigators recently found that another pancreatic enzyme (lipase) could be a more pertinent marker of pancreatic fistula, but this requires confirmation in a greater number of patients. The objective is to evaluate the diagnostic performance of lipase in the drains for the early detection of pancreatic fistula with clinical repercussions in the 30 days following the surgery. The study consists in collecting at 4 different time points (D1, D3, D4 and D6) a tube of blood and a tube of drain liquid.

This will be a prospective, multi-center, post-market, single arm observational study to collect clinical outcome data on the use of Permacol™ Collagen Paste in the treatment of anorectal fistulas. The subjects will have baseline and day of surgery visits performed, and then subjects will return to the investigator for evaluation of defect and safety related morbidities at follow up visits scheduled at 1 month, 3 months, 6 months and 12 months post-surgery.

The objective of this study is to evaluate the safety and performance post last embolization with Onyx

Dialysis patients have their blood filtered by a machine as their kidneys no longer work. To get blood in and out of these patients it is possible to perform a surgical procedure to increase to size and durability of a vein in the arm to allow repeated needle insertion. This enlarged vein is called a fistula. There is some evidence that ultrasound scanning the blood vessels in the arm before surgery can improve the chances of a successful procedure. The investigators aim to test whether scanning all patients is better than scanning only those who are difficult to assess by physical examination alone.

Interest of training in procedural simulation of nurses in the reduction of complications related to arteriovenous fistula puncture in hemodialysis patients

Many guidelines at home and abroad advocate that arteriovenous fistula should be the first choice of permanent vascular access, but it is easy to form thrombus in a short time after arteriovenous fistula molding, resulting in internal fistula stenosis or occlusion. In this study, the investigators plan to screen the patients with arteriovenous fistula in the blood purification center of our hospital. Through the study design of random grouping and open label, the investigators will discuss the use of low molecular weight heparin or warfarin to prevent thrombosis in a short period of time after arteriovenous fistula operation. According to the research results, the investigators will understand efficacy and safety of short-term postoperative anticoagulant therapy to prevente thrombosis in arterovenous fistula.

An anal fistula is an abnormal communication between the luminal surface of the anorectal canal and the perianal skin. Fistulas can vary in their complexity and can be challenging to treat, due to the anatomical relation to the anal sphincter complex that controls continence. In addition, fistulas can display complex features such as branches, cavities and horseshoes; where the tract travels radially around the anal canal. All these features have a role in determining the most appropriate surgical treatment option, and are key to understanding the surgical decision-making process. This study will determine patient understanding of fistula anatomy, their perception of their own understanding, their rating of how good their clinician's explanation is and how this impacts the decision-making process using standard explanation with 2D images, versus a 3D printed model of a fistula.