Jornal Vascular Brasileiro最新文献

Lipedema is characterized by abnormal fat deposition in areas such as the arms, hips, buttocks, and thighs, sparing the hands and feet. Symptoms include pain, bruising, edema, and subcutaneous nodules, which resist traditional interventions such as diet and exercise. Despite increasing recognition, comprehensive understanding, including pathophysiological, clinical, and therapeutic aspects, has not been fully achieved. This review aims to fill gaps in knowledge of this field, to support more informed management of lipedema. This narrative review provides a deeper understanding of lipedema treatment, addressing pathophysiology and therapeutic options. The data reveal advances in knowledge, especially regarding conservative and surgical treatments, focusing on improving quality of life. However, scientific evidence supporting the safety and efficacy of various treatments is lacking. Additional research is needed to ensure safety and to enhance efficacy of management of this complex condition.

Intervention studies require all participants to originate from the same population, with random allocation to intervention groups to ensure comparability. Randomization is crucial for minimizing confounding factors, allowing differences in outcomes to be attributed to the intervention. Simple randomization performs well for large samples (>100 per group), but smaller samples may require block or stratified randomization to balance group sizes and covariates. When randomization isn't feasible, quasi-randomized methods (e.g., based on dates or enrollment order) can help but must compensate with multivariate adjustments. Moreover, blinding and allocation concealment enhance internal validity and reproducibility. Allocation concealment (e.g., sealed envelopes) prevents bias during participant assignment while blinding mitigates detection and performance biases. Precise methodological descriptions in clinical trial registrations and publications enhance study reliability and reproducibility, highlighting the importance of rigorous planning and transparent reporting in intervention research. This article reviews the key concepts of randomization, blinding, and allocation concealment in interventional studies.

Colorectal cancer is one of the most prevalent malignant neoplasms in Brazil. Hepatectomy for resection of liver metastases plays an essential role in increasing disease-free survival, with the possibility of cure. The feasibility of liver resection depends on factors related to the remaining liver after surgery. In this article, a case is reported on the hepatic metastasectomy approach in a 47-year-old female patient, with colon adenocarcinoma who underwent vascular reconstruction in the same surgical procedure. The intrahepatic mass was transposition of the gastroduodenal artery through the anastomosis of the gastroduodenal artery and the right hepatic artery in a continuous suture, without complications. It is concluded that vascular anastomosis in hepatectomies for colon adenocarcinoma metastases is a complex procedure that requires skill and experience from the surgeon. The success rate is high, but it is important to be aware of the risk factors for complications. The most current data suggest that vascular reconstruction does not alter overall disease-free survival, but further studies are needed.

Pulmonary arteriovenous malformations (PAVM) are characterized by abnormal pulmonary vessels forming arteriovenous shunts that compromise oxygenation of the blood, causing hypoxemia, and predispose to infections and cerebral ischemia. The patient in this case was a 38-year-old male who presented with tachypnea and dyspnea, cyanosis of extremities, and significant digital clubbing. The patient had structural epilepsy secondary to neurosurgery for a cerebral abscess during childhood. Arterial blood gas analysis showed significant hypoxemia (PaO₂ = 46.2; SaO₂ = 77%; PaO₂/FiO₂ = 70) and a chest computed tomography showed PAVM in the apical segments of the right upper and lower lobes, with ectatic and tortuous vascular structures following an intraparenchymal path, communicating with the pulmonary artery and veins. After confirmation of the PAVM, it was concluded that elevated pulmonary resistance was contributing to refractive hypoxemia and hypercapnia. Gradual reduction of the ventilation parameters, primarily controlled pressure and positive end-expiratory pressure, and consequent reduction of the arteriovenous shunt, resulted in progressive improvement of oxygenation and respiratory mechanics. The vascular surgery team's assessment was that treatment with embolization was warranted.

Venous aneurysms are uncommon and can involve the entire venous system and occur at any age. The presence of these aneurysmal formations at the level of the saphenous vein junction is rarely reported, given the small number of cases described in the literature. We report the case of a 41-year-old patient with an aneurysm in the saphenofemoral junction of the right great saphenous vein, discovered incidentally during a consultation for varicose veins of the right lower limb.

Background: The Giacomini vein (GV) can transfer reflux from perineal veins, tributary veins, and perforators of the thigh to the small saphenous vein (SSV). Vascular ultrasound with Doppler (VUD) is the preferred method for detecting reflux in specific veins such as the GV.

Objective: To identify GV depth and diameter, reflux in the GV, and presence of reflux in the SSV caused by the GV.

Methods: A cross-sectional, retrospective study was conducted in women undergoing lower limb venous mapping for varicose vein surgery. The following parameters were analyzed in GVs in which reflux was detected: segmental or diffuse reflux pattern; GV diameter and depth; and reflux in the SSV caused by the GV.

Results: 340 of the 2368 women evaluated were included in the study because they had a GV, totaling 511 veins analyzed, 150 (29.4%) of which had reflux. The diameters of the 150 GVs with reflux ranged from 1.5 to 7.8 mm and their depth varied from 4 to 25 mm. Most GVs with reflux (91.3%) had a segmental reflux pattern. The majority (66%) of refluxing GVs drained reflux into the popliteal vein through the saphenopopliteal junction, while reflux was transferred to the SSV in 34 veins (22.7%), and was drained by a tributary vein in the thigh in 15 veins (11.3%).

Conclusions: Approximately one-third of the studied GVs had reflux, mostly segmental, mean caliber was 2.7 mm, and mean depth was 11 mm. Reflux in the SSV originating from the GV was detected in 22% of the evaluated veins.

Chronic venous disease of the lower limbs is a highly prevalent pathology and endovenous thermoablation is the technique of choice for treatment of insufficient saphenous veins. However, there is still controversy about the best management for varicose tributaries. This article reports a case of outpatient treatment of reflux of the small saphenous vein and tributary veins in a 52-year-old female patient with post-thrombotic syndrome complaining of pain and edema in the right lower limb. We performed the Transfixing Endovenous Thermal Ablation (TEThA) technique with thermoablation of the small saphenous vein and varicose veins combined with ultrasound-guided administration of 2% polidocanol foam. After 30 days, the control Doppler ultrasound showed occlusion of the short saphenous vein and absence of ultrasound signs of varicose veins and thrombosis. The combined endovenous and perivenous treatment of lower limb varicose veins proved to be safe, fast, and effective.

Background: The Aberdeen Varicose Vein Questionnaire (AVVQ) is the most widely-used questionnaire to assess chronic venous disease. Because the first item requires patients to agree to draw their veins, its paper form has been called into question leading to the development of a tablet version that has simplified its application. However, the literature still lacks a comparison of these tools.

Objectives: To compare agreement between scores, questionnaire completion time, and user-friendliness between paper-based and tablet-based versions of the AVVQ.

Methods: In a prospective, multicenter trial, consecutive patients were asked to complete paper-based and tablet-based versions of the AVVQ. Scores, questionnaire completion time, data entry time, and degree of user difficulty were compared.

Results: Data were collected from 88 patients, 22.7% had completed primary school and 43.2% had higher education. Most patients (88.6%) reported that the tablet version was easy to use. Median time to complete the questionnaire and compute scores was 4 minutes for the tablet version and 9.5 minutes for the paper version (p<0.001). Mean AVVQ scores obtained by patients did not differ significantly between the two groups (p=0.431).

Conclusions: In this study, paper and tablet versions of the AVVQ yielded similar scores, with the tablet version saving time when considering the entire process needed to apply the questionnaire and compute data.

We report the case of a patient with a saccular aneurysm of the hepatic artery with maximum diameter of 2.8 cm, no proximal neck, and involving the bifurcation of the proper hepatic artery, constituting a hostile anatomy for endovascular treatment, which would usually be the first choice for such cases. We performed open surgical treatment with resection and reconstruction using an autologous graft (internal saphenous vein). We illustrate the surgical technique used for adequate vascular exposure of the celiac trunk and hepatic hilum (which is often an area little explored by vascular surgeons) and of structures anatomically close to the hepatic artery. We also illustrate the anastomosis with telescoping technique. We demonstrate the need for vascular surgeons to master the anatomy and classical surgical technique for visceral branches, even in the era of minimally invasive procedures.