Consistent application of compression: An under-considered variable in the prevention of venous leg ulcers.

Venous leg ulcers, the most common leg ulcer, occur in patients with chronic venous insufficiency due to venous hypertension. Evidence supports the conservative treatment with lower extremity compression, ideally between 30-40 mm Hg. Pressures in this range provide enough force to partially collapse lower extremity veins without restricting arterial flow in patients without peripheral arterial disease. There are many options for applying such compression, and those who apply these devices have varying levels of training and backgrounds. In this quality improvement project, a single observer utilised a reusable pressure monitor to compare pressures applied using different devices by individuals in wound clinics with diverse training from specialties of dermatology, podiatry, and general surgery. Average compression was higher in the dermatology wound clinic (n = 153) compared to the general surgery clinic (n = 53) (35.7 ± 13.3 and 27.2 ± 8.0 mm Hg, respectively, p < 0.0001), and wraps applied by clinic staff (n = 194) were nearly twice as likely as a self-applied wrap (n = 71) to have pressures greater than 40 mm Hg (relative risk: 2.2, 95% confidence interval: 1.136-4.423, p = 0.02). Pressures were also dependent upon the specific compression device used, with CircAid®s (35.5 mm Hg, SD: 12.0 mm Hg, n = 159) providing higher average pressures than Sigvaris Compreflex (29.5 mm Hg, SD: 7.7 mm Hg, n = 53, p = 0.009) and Sigvaris Coolflex (25.2 mm Hg, SD: 8.0 mm Hg, n = 32, p < 0.0001). These results indicate that the device-provided pressure may be dependent on both the compression device and the background and training of the applicator. We propose that standardisation in the training of compression application and increased use of a point-of-care pressure monitor may improve the consistency of applied compression, thus improving adherence to treatment and outcomes in patients with chronic venous insufficiency.

Rectification of cavernosal fibrosis and veno-occlusive dysfunction by administration of suberoylanilide hydroxamic acid in a rat model of cavernosal nerve injury: Comparison with a PDE5 inhibitor.

BACKGROUND: Cavernosal fibrosis, which is induced by cavernosal nerve (CN) injury and progresses with time, is the main cause of cavernosal veno-occlusive dysfunction (CVOD) after radical prostatectomy. OBJECTIVES: To determine whether daily oral administration of suberoylanilide hydroxamic acid (SAHA; vorinostat) for 5-weeks from the immediate post-injury period after CN injury would rectify CVOD by suppressing cavernosal fibrosis and normalizing HDAC pathway in a rat model of CN crush injury (CNCI) and to compare the results with those obtained using chronic administration of PDE5-inhibitors (a positive control). METHODS: Fifty-six 12-week-old rats were randomized into the four groups: sham surgery (S), CNCI (I), and CNCI treated with daily administration of 25.0 mg/kg SAHA (V) or 20.0 mg/kg udenafil (P). Group-V and Group-P received the respective treatment for 5-weeks from the following day after CNCI. At 5 weeks after surgery, dynamic infusion cavernosometry (DIC), histological staining, and Western blot analysis were performed. RESULTS: Group-I had a significantly decreased papaverine response, higher maintenance rate or drop rate, lower smooth muscle (SM)/collagen ratio, decreased SM content, and increased protein expression of HDAC2, HDAC3, TGF-ß1, and collagen-1, compared with Group-S. The three DIC parameters in Group-V and Group-P significantly improved compared to those in Group-I. Except for the maintenance rate, the improvement in papaverine response and drop rate in Group-V was not significantly different from that in Group-P. Group-V and Group-P showed the rectification of SM/collagen ratio and protein expression of TGF-ß1 or collagen-1. SM content was improved in Group-P, but not in Group-V. Group-V showed the normalization of protein expression of both HDAC2 and HDAC3, whereas protein expression of only HDAC2 was partially restored in Group-P. DISCUSSION: Treatment strategies targeting the HDAC pathway might be helpful to alleviate CVOD induced by CN injury. CONCLUSIONS: According to our data, chronic administration of SAHA improves post-injury CVOD by suppressing cavernosal fibrosis via rectifying the HDAC/TGF-ß1 pathway in nerve-injured rats, comparable to that with PDE5 inhibitors.

The perplexity of catheter-directed thrombolysis for deep venous thrombosis: the approaches play an important role.

The recent adjunctive catheter-directed thrombolysis (ATTRACT) trial rose a controversy about the treatment effect of catheter-directed thrombolysis (CDT) in deep venous thrombosis (DVT). In fact, most studies including the ATTRACT trial did not perform subgroup analysis of catheterization approaches. Different approaches would confound the conclusions. Therefore, a single-center retrospective analysis was performed to compare the differences between the antegrade (AGA) and retrograde (RGA) approaches. Total 217 DVT patients treated with CDT were enrolled from January 2010 to December 2017, with mean age of 55.3 years (67 received antegrade approach, 150 received retrograde approach). The clot burden reduction by segment was evaluated. The mean access establishment time and thrombolytic time were compared. The patency of the iliofemoral vein at 6 months was evaluated. The rate of PTS, quality of life and venous insufficiency were assessed at 1 year. AGA group showed better thrombolytic effect in popliteal and femoral vein than RGA group. The rate of iliofemoral clot burden reduction in RGA group was mostly at Grade II, while most were at Grade III in AGA group. The retrograde approach showed better thrombolysis effect in iliofemoral DVT than popliteal to iliac DVT. The RGA group reported longer mean access establishment time (5.4 ± 1.8 vs 27.0 ± 7.5 min, p < 0.001) and thrombolytic time (6.9 ± 1.5 days vs 6.8 ± 1.5 days, p = 0.586). At 6 months, RGA group had a lower rate of femoral vein patency (52.0% vs 89.6%, p < 0.001) and a higher rate of venous insufficiency (52.0% vs 29.9%, p < 0.001), compared with AGA group. Although there was no difference in the rate of PTS, the RGA group showed higher Villalta scores in the free and mild PTS. The antegrade approach was preferably recommended over the retrograde approach for CDT treatment.

The impact of exercise training on calf pump function, muscle strength, ankle range of motion, and health-related quality of life in patients with chronic venous insufficiency at different stages of severity: a systematic review / O impacto do treinamento físico na função da bomba da panturrilha, força muscular, amplitude de movimento do tornozelo e qualidade de vida relacionada à saúde em diferentes estágios de gravidade da insuficiência venosa crônica: uma revisão sistemática

Abstract Exercise training (ET) is an important tool in the management of patients with chronic venous insufficiency (CVI). The objective of this article was to discuss the effects of ET on the calf pump, functional parameters, and quality of life of patients with mild and advanced CVI. A systematic review was conducted and eleven studies were included. In patients with mild CVI, ET was effective for improving venous reflux, muscle strength, ankle range of motion, and quality of life. In advanced CVI patients, ET increased ejection fraction, reduced residual volume fraction, and improved muscle strength and ankle range of motion, but did not change venous reflux indices or quality of life. It is concluded that ET is effective for improving calf pump function, muscle strength, and ankle range of motion in CVI. In patients with mild CVI, additional benefits were observed in quality of life.

Resumo O treinamento físico é uma importante ferramenta no tratamento de pacientes com insuficiência venosa crônica. O objetivo foi discutir os efeitos do tratamento físico na bomba da panturrilha, os parâmetros funcionais e a qualidade de vida de pacientes com insuficiência venosa crônica leve e avançada. Uma revisão sistemática foi realizada, e 11 estudos foram incluídos. Na insuficiência venosa crônica leve, o treinamento físico foi eficaz na melhora do refluxo venoso, da força muscular, da amplitude de movimento do tornozelo e da qualidade de vida. Na insuficiência venosa crônica avançada, o treinamento físico aumentou a fração de ejeção, reduziu a fração de volume residual e melhorou a força muscular e amplitude de movimento do tornozelo, sem alterações nos índices de refluxo venoso e na qualidade de vida. Conclui-se que o treinamento físico é eficaz na melhoria da bomba da panturrilha, da força muscular e da amplitude de movimento do tornozelo na insuficiência venosa crônica. Em pacientes com insuficiência venosa crônica leve, foram encontrados benefícios adicionais na qualidade de vida.

Insuficiência venosa crônica e uso de meia elástica de compressão graduada: uma análise sobre a adesão ao tratamento em pacientes do SUS / Chronic venous insufficiency and graduated compression stockings: analysis of public health system patients' adherence to treatment

Resumo Contexto A insuficiência venosa crônica é uma doença de alta prevalência mundial, podendo chegar a até 80% da população. Sua incidência aumenta com a idade e é mais frequente no sexo feminino. Das opções terapêuticas, destaca-se a terapia compressiva, sendo a principal o uso de meia elástica de compressão graduada, considerado o tratamento básico para a insuficiência venosa crônica independentemente da classificação clínica do paciente. Na prática clínica, o resultado da terapia é prejudicado pela não adesão ao uso da meia. Objetivos Avaliar a taxa de adesão ao uso da meia elástica de compressão graduada, assim como compreender a problemática da não aderência ao tratamento. Métodos Estudo observacional transversal, realizado entre junho de 2017 até janeiro de 2019, mediante aplicação de questionário aos pacientes em ambulatório de cirurgia vascular do Sistema Único de Saúde (SUS), em um hospital-escola, em Curitiba, no estado do Paraná (PR). Os dados foram analisados com o programa computacional IBM SPSS Statistics v.20.0. Resultados Foram analisados 240 pacientes. A média de idade foi de 57,5±12,9 (22-86); 84,2% eram do sexo feminino. Do total de pacientes analisados, 106 (44,2%) não aderiram ao uso das meias. As justificativas para o não uso foram: questão financeira, dor, desconhecimento da necessidade, calor e outras. Conclusões A taxa de adesão encontrada no presente estudo foi de 55,8%, e o principal motivo para o não uso foi a questão financeira.

Abstract Background Chronic venous insufficiency (CVI) is a pathology of great importance due to its high worldwide prevalence, affecting up to 80% of the population. Its incidence increases with age and is more frequent in females. One of the most important treatment options is compression therapy and the main method employed is wearing graduated compression stockings, which is considered the basic treatment for CVI regardless of the patient's clinical classification. In clinical practice, treatment outcomes are impaired by patients not wearing the stockings properly. Objectives To analyze the rate of adherence to wearing graduated compression stockings and to understand the problem of treatment non-adherence. Methods Cross-sectional observational study conducted from June 2017 to January 2019, based on administration of questionnaires to patients at a SUS vascular surgery clinic at a teaching hospital, in Curitiba, PR, Brazil. Data were analyzed using the IBM SPSS Statistics v.20.0 computer program. Results 240 patients were analyzed. Mean age was 57.5 ± 12.9 (22 - 86) and 84.2% of the sample were female. 106 of the 240 patients analyzed (44.2%) were non-adherent with wearing compression stockings. Reasons for not wearing the stockings were: financial; pain; ignorance of the need to wear them; heat; and others. Conclusions The adherence rate observed in the present study was 55.8% and the most prevalent reason for not wearing stockings was financial.

Eficácia dos exercícios terapêuticos na qualidade de vida de pacientes com insuficiência venosa crônica: uma revisão sistemática / Effectiveness of therapeutic exercises for improving the quality of life of patients with chronic venous insufficiency: a systematic review

Resumo Os principais sinais e sintomas da insuficiência venosa crônica são dor, edema, varizes e alterações teciduais, condições que comprometem a funcionalidade e qualidade de vida. Visando amenizar esses prejuízos, o manejo da doença envolve uma ampla modalidade de intervenções; entre elas, o exercício terapêutico. Esta pesquisa apresenta as evidências existentes sobre a efetividade dos exercícios terapêuticos na qualidade de vida, dor e funcionalidade da insuficiência venosa crônica. Efetuou-se uma busca nas bases de dados CENTRAL, CINAHL, LILACS, MEDLINE, PEDro, SciELO, Science Direct, Scopus e Web of Science. Dos 2.961 resultados, quatro atenderam aos critérios de elegibilidade. Desses, apenas um estudo mostrou benefícios dos exercícios para melhora da qualidade de vida e redução da dor. Os demais apresentaram baixa qualidade metodológica. Portanto, as evidências existentes são insuficientes para indicar ou contraindicar os exercícios terapêuticos para melhoria da qualidade de vida, dor e funcionalidade em pacientes com insuficiência venosa crônica.

Abstract The main signs and symptoms of chronic venous insufficiency are pain, edema, varicose veins, and tissue changes; conditions that compromise functionality and quality of life. Management of the disease aims to mitigate these losses and involves a wide range of interventions, one of which is therapeutic exercise. This article presents the existing evidence on the effectiveness of therapeutic exercises for quality of life, pain, and functionality in chronic venous insufficiency. Searches were run on the databases CENTRAL, CINAHL, LILACS, MEDLINE, PEDro, SciELO, Science Direct, Scopus, and Web of Science. Four of the 2,961 results met the eligibility criteria. Only one of these studies showed benefits of exercise for improving quality of life and reducing pain. The others had low methodological quality. The existing evidence is therefore insufficient to indicate or contraindicate therapeutic exercises for improvement of quality of life, pain, and functionality in patients with chronic venous insufficiency.

Compression stocking prevents increased venous retrograde flow time in the lower limbs of pregnant women.

OBJECTIVES: To analyze the effect of graduated compression stockings on the venous reflux in the lower limbs of pregnant women. METHOD: A controlled randomized clinical trial was performed with sixty women: intervention group (n = 30), who used compression stockings, and control group (n = 30). Using duplex-ultrasound, the reflux time and peak reflux velocity in the great saphenous vein and small saphenous vein were analyzed. RESULTS: Great saphenous vein reflux times in the intervention group were 0.13 s at the beginning (initial) and 0.04 s at the end of pregnancy (final) in the right leg and 0.02 s and 0.34 s (p < 0.0001) in the control group. No patient in the intervention group experienced pathological reflux at the end of the pregnancy. There was a significant difference in the reflux time measured from both the great saphenous vein and small saphenous vein and peak reflux velocity between the groups. CONCLUSION: Compression stockings prevent increased venous reflux in lower limbs of pregnant women.

Examination of the effects of a new compression garment on skin tissue oxygenation in healthy volunteers.

OBJECTIVE: Compression devices have been shown to reduce venous stasis, increase blood flow and skin tissue oxygenation (StO2), promoting healthy tissue. This study aimed to explore the efficacy of a new compression garment in three different positions in healthy adults. METHODS: In this quantitative study, potential participants were screened and recruited using the Physical Activity Readiness Questionnaire (PAR-Q, Canada). Participants attended three separate, one-hour sessions to evaluate StO2 in supine-lying, chair-sitting and long-sitting positions. StO2 was recorded for 20 minutes pre-, during and post- a 20-minute intervention using a compression garment, TributeWrap (Lohmann-Rauscher, Germany). A repeated-measures analysis of variance (ANOVA) was followed by post-hoc pairwise comparisons. RESULTS: A total of 28 healthy volunteers took part (aged 24.6 ±8.4years; 13 males, 15 females). A significant difference was seen between the three positions (p<0.001). Chair-sitting had the lowest StO2 pre-intervention, increasing StO2 significantly (32.25%, p<0.001) during wear of the compression garment (24.8% higher than baseline post-intervention). No significant difference was seen between long sitting and supine-lying (p=1.000). In contrast, long-sitting and supine-lying StO2 was higher pre-intervention compared with chair-sitting and only increased post-intervention (11% and 16.8% respectively, p<0.001) compared with baseline. CONCLUSION: The compression garment significantly increased StO2 levels in both seating positions. Further studies are required to determine if increasing StO2 through short intervention sessions with this device has the potential to improve self-management of tissue health in individuals with reduced mobility, oedema or venous insufficiency.

Impact of Venous Outflow Pattern on Flap Compromise in Head and Neck Reconstruction: Review of 309 Radial Forearm Free Flaps.

There is ongoing controversy regarding the most appropriate venous drainage pattern for anastomosing the radial forearm free flap in head and neck reconstruction. Although the various perforator flaps have been used in our practice, the authors evaluated the impact of venous outflow pattern on the incidence of only the radial forearm free flap compromise for minimizing the bias. The authors retrospectively reviewed 309 radial forearm free flaps used for head and neck reconstruction following cancer ablation (January 2005 to December 2015), and evaluated the association between the incidence of venous insufficiency and the choice of venous system in the flap and at the recipient site, the number of venous anastomoses, and the combination of flap and recipient venous systems. No significant association was found between the incidence of venous insufficiency and the risk factors evaluated. Compared with single or dual anastomosis involving only the vena comitantes, dual anastomosis involving distinct venous systems was associated with lower incidence of venous insufficiency (P = 0.039). The dual anastomosis of separate venous system was correlated with lower incidence of venous insufficiency compared with the single or dual anastomosis of vena comitantes only (P = 0.039).

Effects of preventive use of compression stockings for elderly with chronic venous insufficiency and swollen legs: a systematic review and meta-analysis.

BACKGROUND: Many home-dwelling elderly use medical compression stockings to prevent venous insufficiency, deep venous thrombosis, painful legs and leg ulcers. Assisting users with applying and removing compression stockings demands resources from the home based health services, but the effects are uncertain. This systematic review aims to summarize the effects of preventive use of medical compression stockings for patients with chronic venous insufficiency and swollen legs. METHODS: We conducted a search in six databases (Epistemonikos, Cochrane Database of Systematic Reviews, MEDLINE, Embase, CENTRAL and CINAHL) in March 2018. Randomized controlled trials evaluating the preventive effects of European standard compression stockings class 3 or 2 for elderly with chronic venous insufficiency and swollen legs were included. Primary outcomes were thrombosis, leg ulcers and mobility. Secondary outcomes were other health related outcomes, e.g. pain, compliance. We assessed risk of bias in the included studies and used the Grading of Recommendations Assessment, Development and Evaluation (GRADE) tool for evaluating the overall quality of evidence. RESULTS: Five randomized controlled trials met the inclusion criteria. Comparing compression stockings class 2 to class 1, meta-analysis showed a reduction in leg ulcer recurrence at 12 months (RR 0.52; 95% CI 0.30 to 0.88). The quality of evidence was assessed as moderate by GRADE. One study (100 participants) did not detect a difference between compression stockings class 3 versus class 2 on ulcer recurrence after six months (RR 0.64; 95% CI 0.20 to 2.03). In another study, patients wearing class 3 compression stockings had lower recurrence risk compared with patients without stockings (RR 0.46; 95% CI 0.27 to 0.76) at six months and (RR 0.43; 95% CI 0.27 to 0.69) at 12 months. We found no difference between class 2 and class 1 stockings on subjective symptoms of chronic venous insufficiency or outcomes of vein thrombosis or mobility. CONCLUSION: Compression stockings class 2 probably reduce the risk of leg ulcer recurrence compared to compression stockings class 1. It is uncertain whether the use of stockings with higher compression grades is associated with a further risk reduction. More randomized controlled trials on vein thrombosis and mobility are needed.

The efficiency of O-(beta-hydroxyethyl)-rutosides in reducing the incidence of superficial venous insufficiency in patients with calf muscle pump dysfunction.

Objective We aimed to evaluate the efficiency of O-(beta-Hydroxyethyl)-rutosides (Oxerutin) in reducing the incidence of venous system disease among patients with calf muscle pump dysfunction secondary to immobilization due to lower-limb fractures. Methods A total of 60 patients with lower-limb fractures and immobilized in plaster casts were included in this study randomized into control (n = 30; mean: 30.37 ± 6.03 years; 73.3% males; no treatment) and experiment (n = 30; mean: 31.67 ± 4.76 years; 66.6% males; Oxerutin, 500 mg po q12hr) treatment groups. Doppler ultrasound was performed to evaluate the effect of oxerutin on the alterations in the venous circulation. Results Patients in the control group were determined to be more commonly affected from the below-knee immobilization in terms of venous dysfunction in the great saphenous vein in the below-knee region when compared with the patients in the oxerutin treatment group (46.7 vs. 13.3%, respectively; p = 0.011). Incidence of reflux in the small saphenous vein was more common in the control group during the healing period when compared with the experiment group (40.0 vs. 10.0%, respectively; p = 0.017). None of the patients developed venous thrombosis. Conclusions In conclusion, the impairment of the lower extremity muscle pump should be considered as an important risk factor for venous disease, and should be evaluated. O-(beta-Hydroxyethyl)-rutosides during 6-8 week cast immobilization for a lower limb fracture may be an effective prophylactic regimen in reducing the incidence of reflux in the below-knee superficial veins.

[Prophylaxis of Recurrent Venous Leg Ulcer]. / Rezidivprophylaxe des Ulcus cruris venosum.

Venous leg ulcer (VLU) counts among the most common chronic wounds in Europe. Treatment is lengthy, cumbersome and costly, and there is a high rate of recurrence. This review shows the measures that should be offered to every patient with healed VLU to permanently prevent recurrence. To prevent VLU in case of varicose veins, the progression of chronic venous insufficiency (CVI) has to be stopped. There is convincing evidence that the effective treatment of varicose veins reduces the recurrence rate in patients with VLU. In patients with post-thrombotic syndrome (PTS), further thrombosis should be prevented through targeted prophylaxis of new thromboembolic events. The benefit of endovascular revascularization on the VLU recurrence rate in patients with post-thrombotic damage in the pelvic veins has not been proven in clinical studies. On the other hand, it has been clearly demonstrated in several studies that compression therapy is the basic procedure for the prevention of recurrent VLU in patients with varicose veins or PTS, regardless of whether other measures have been implemented or not. Good adherence in patients with compression therapy is more important than choosing the highest possible compression class. Future efforts for patients with VLU must aim to provide therapists with tools and treatment strategies to guide their patients and to increase patients' acceptance and understanding of the importance of self-management, in particular regarding compression therapy for the prevention of recurrent VLU.

[Thrombectomy and plication of veins as a method of preventing pulmonary artery thromboembolism at a multidisciplinary surgical hospital].

The authors assessed efficacy and safety of the operation of plication of deep veins of lower extremities, pelvic veins, and the inferior vena cava as a method of preventing fatal pulmonary artery thromboembolism. A total of 48 patients were operated on. Of these, 23 patients belonged to traumatological-and-orthopaedical cohort, 3 to general surgical cohort, 4 to gynaecological, and 18 to vascular cohort (isolated deep vein thrombosis). The length of the floating head of the thrombus varied from 2 to 10 cm. The presence of a floating thrombus in traumatological, surgical and gynaecological patients, regardless of the length of the floating part was an absolute indication for thrombectomy and venous plication. Vascular patients were operated on in accordance with the National Guidelines (with the length of the thrombus floating portion of not less than 4 cm). In all cases, surgical management envisaged direct and indirect thrombectomy. Plication was always performed above the level of venotomy. It was shown that thrombectomy combined with plication of major veins is a reliable and safe method of prophylaxis, being in some cases the only possible method of preventing fatal pulmonary artery thromboembolism. The operation of plication makes it possible not to cancel a scheduled surgical intervention in patients with a detected floating thrombus of major veins. The operation of thrombectomy and plication above the level of the floating head of the thrombus may be considered an operation of choice in the conditions where there is no possibility to use endovascular methods of treatment (implantation of a cava filter, endovascular catheter thrombectomy), as well as in pregnant women. Restoration of the venous lumen occurs at safe terms spontaneously, not requiring repeat surgical intervention. Simultaneous plication of the vein does not complicate the course of the postoperative period of the main surgical intervention. Thrombectomy and plication do not lead to the development of severe chronic venous insufficiency.

La escleroterapia con espuma es un método eficaz para el tratamiento de la insuficiencia venosa / Foam sclerotherapy is an effective method for the treatment of venous insufficiency

«La escleroterapia puede mucho más de lo que en general imaginamos. Teóricamente lo puede todo (Mollard 1994)». En esta reflexión, este cirujano vascular, intuye la potencialidad de los esclerosantes en la nueva forma farmacéutica acabada de nacer. La escleroterapia, procedimiento técnicamente ciego, no evolucionaba, permanecía durante décadas como complemento a la cirugía. No podía progresar porque estaba presa de limitaciones inherentes a la forma líquida de los productos utilizados que impiden hacer suyos los requerimientos básicos de la escleroterapia: a) Conocimiento de la concentración intravascular del esclerosante. b) Homogénea, extensa y manejable distribución sobre las paredes venosas. c) Control del tiempo de contacto esclerosante-endotelio. La clave de la escleroterapia se encierra en el control de la acción de los fármacos esclerosantes y este control se consigue con la forma farmacéutica de espuma inyectable; con ella la escleroterapia rápidamente evoluciona hasta alcanzar una nueva era

'Sclerotherapy can be much more than we generally imagine. Theoretically, it can be everything. (Mollard 1994)'. In this reflection, a vascular surgeon sensed the potentiality of sclerosing agents in the recently created new pharmaceutical form. Sclerotherapy, technically a blind procedure, did not evolve; it remained as a complement to surgery for years. It was unable to progress because it was a prisoner of the imitations adherent to the liquid form of the products used, which that impeded compliance with the basic requirements of sclerotherapy: a) Knowledge of the intravascular concentration of the sclerosing agent. b) Homogeneous, extensive, and manageable distribution of the venous walls. c) Temperature control of the sclerosing agent-endothelium contact. The key to sclerotherapy involves controlling the action of the sclerosing drugs, and this control is achieved in the pharmaceutical form of an injectable foam, and with this, sclerotherapy rapidly advanced until reaching this new era. Nowadays, different therapies are used in the treatment of varicose veins, including radiofrequency and laser ablation, stripping, surgery, echanical-chemical systems, steam, and glue, with very different outcomes. Sclerotherapy is a minimally invasive technique used for more than a hundred years, and useful for treating tiny little veins, until recently, in 1993, a pharmaceutical grade foam was developed that succeeded in treating large varicose veins, and is imitated by many others. The physical-chemical features of these foams vary considerably among themselves, depending on the production technique, concentration of sclerosing agent, types of gases used, gas/liquid proportion, type of gas/ size of bubble ratio, as well as varying in their safety and therapeutic use. The optimal liquid/gas proportion is obtained when there is sufficient liquid for the bubbles to be spherical and with the smallest diameter possible, but without introducing excess sclerosing liquid, which is described as kugelschaum (wet foam) or alternatively, it forms polyederschaum (dry foam). A series of experimental and theoretical studies have been conducted with the purpose of investigating the mechanical and rheological properties of the foams. However, to study its dynamic behaviour is a challenging theoretical problem, due to the complex interaction between the physical phenomena that occur in different longitudinal scales (that is to say, from the molecular to the macroscopic). And, in this interesting time of the evolution of the injection of drugs deposited over bubbles, is where we currently are

Comparison of Single and Double Venous Anastomoses in Head and Neck Oncologic Reconstruction Using Free Flaps: A Meta-Analysis.

BACKGROUND: Venous insufficiency is the main cause of failure and surgical revision in free flap surgery. Achieving a double venous anastomosis is frequently proposed to improve flap drainage. However, this procedure remains controversial. The authors evaluated, through a meta-analysis, the benefit of double venous anastomoses in the venous thrombosis, surgical revision, and failure rates of free flaps in head and neck oncologic reconstruction. METHODS: A systematic literature review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses criteria in the MEDLINE, PubMed Central, Cochrane Library, and EMBASE databases. Statistical heterogeneity evaluation and then fixed effects and random effects models were used. RESULTS: Sixteen articles were included involving 3684 flaps. The overall success rate was 96.15 percent. The authors reported a failure rate of 1.51 percent in the group with two anastomoses versus 5.03 percent in the group with single anastomoses (OR, 0.64; 95 percent CI, 0.277 to 1.522; p = 0.320). The authors found a venous thrombosis rate of 2.74 percent in the group with two anastomoses versus 4.54 percent in the group with single anastomoses (OR, 0.535; 95 percent CI, 0.334 to 0.858; p = 0.009). There were also more surgical revisions in the single venous anastomoses group, 11.87 percent versus 6.04 percent (OR, 0.474; 95 percent CI, 0.349 to 0.643; p < 0.001). CONCLUSIONS: This meta-analysis supports that performing a double venous anastomosis confers protective effects in venous thrombosis and surgical revision, thus reducing free flap failure. The authors recommend the achievement of double venous anastomosis whenever it is feasible in head and neck oncologic reconstruction. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.

Tratamento fisioterapêutico vascular para a doença venosa crônica: artigo de revisão / Vascular physiotherapy for treatment of chronic venous disease: review article

A fisioterapia tem papel importante no processo de prevenção e recuperação de danos causados pela doença venosa crônica (DVC), com técnicas adequadas e focadas no quadro clínico da doença, sendo então denominada de fisioterapia vascular. O tratamento fisioterapêutico vascular precoce pode aliviar os sintomas da doença, reduzir o risco de úlceras venosas e melhorar a qualidade de vida do portador de DVC. O objetivo desta revisão de literatura foi elaborar um protocolo de tratamento fisioterapêutico vascular, mostrando evidências e benefícios das técnicas da fisioterapia vascular e sugerindo como podem ser utilizadas no tratamento da DVC. Trata-se de um estudo de revisão de literatura através de referências sobre o tema, considerando os materiais disponíveis nas bases de dados bibliográficos LILACS e SciELO, publicados no período de 1990 a 2014. Esse protocolo constitui uma proposta de tratamento direcionada às necessidades dos indivíduos com DVC, a fim de proporcionar uma melhor qualidade de vida.

Physiotherapy has an important role to play in prevention of and recovery from the damage cause by chronic venous disease (CVD), employing techniques that are adapted to and focused on clinical disease status, in which form it is known as vascular physiotherapy. Early initiation of treatment with vascular physiotherapy can relieve symptoms of the disease, reduce the risk of venous ulcers and improve the quality of life of CVD patients. The objective of this literature review was to develop a protocol for treatment with vascular physiotherapy, compiling evidence of the benefits of each vascular physiotherapy technique and suggesting how they can be used for treatment of CVD. This is a review of literature investigating the subject that is listed on the LILACS and SciELO bibliographic databases and was published from 1990 to 2014. The resulting protocol is a proposal for treatment oriented towards the requirements of people with CVD, with the objective of achieving better quality of life.

Hemodynamic and biologic determinates of arteriovenous fistula outcomes in renal failure patients.

The outcome of patients with end-stage renal disease on hemodialysis depends on a functioning vascular access. Although a variety of access options are available, the arteriovenous fistula remains the best vascular access. Unfortunately the success rate of mature fistula use remains poor. The creation of an arteriovenous fistula is followed by altered hemodynamic and biological changes that may result in neointimal hyperplasia and eventual venous stenosis. This review provides an overview of these changes and the needed research to provide a long lasting vascular access and hence improve outcomes for patients with end-stage renal disease.

[Perforating veins insufficiency in patients with varicose disease].

MATERIAL AND METHODS: It was analyzed the results of complex survey and treatment of 181 patients with varicose disease CEAP degrees C3-C6. Ultrasonic scanning was applied to define localization, severity and extension of blood reflux in venous system. RESULTS: Superficial reflux was revealed in all patients, perforating--in 59.7%, deep--in 22.8% of cases. We concluded that high-intensive total-subtotal blood reflux in superficial veins was main hemodynamic factor resulted perforating insufficiency in 42% of patients, high-intensive deep reflux--in 17.7% of cases additionally. In patients with subcompensated course of disease superficial reflux removal and large perforating veins (diameter 4.5±0.5 mm) ligation are advisable. Small perforating veins insufficiency (diameter 3.5±0.5 mm) is eliminated independently after superficial reflux removal. Two-staged treatment should be used in patients with decompensated course of disease and trophic disorders ofshin. Perforating veins sclerotherapy under ultrasonic control is advisable secondarily after superficial reflux removal.