Low-Molecular-Weight Heparin for Prevention of Venous Thromboembolism After Varicose Vein Surgery in Moderate-Risk Patients: A Randomized, Controlled Trial

Current state of the problem of risk assessment and prevention of venous thromboembolic complications after thermal obliteration of superficial veins

Venous thromboembolic complications (VTEO) after modern minimally invasive superficial vein interventions are an infrequent but very dramatic event. This article presents a review of the literature, covering the issues of prevalence, prognosis and pharmacological prevention of VTEO. The performed studies demonstrate that the incidence of symptomatic thrombotic complications after endovenous thermal obliteration does not exceed 0,5%, but taking into account asymptomatic thermally induced thromboses and subclinical occlusions of the muscular veins of the lower leg, this figure can exceed 10%. There is a high heterogeneity of the data, possibly due to differences in the individual risk of VTEO. The most validated tool for assessing the latter is the Caprini Scale, which has not been sufficiently studied in the surgical treatment of varicose veins. The administration of prophylactic doses of anticoagulants after thermal obliteration of saphenous veins is widely used in routine clinical practice, despite the lack of convincing evidence for the appropriateness of this approach. In recent years, the use of direct oral anticoagulants against the official instruction (off-label) has gained great popularity as an alternative to heparin. The largest evidence base has accumulated for the use of rivaroxaban 10 mg, which is associated with high efficacy and safety. Based on completed clinical trials, it is not possible to formulate unequivocal recommendations for prophylactic anticoagulant doses after thermal obliteration of superficial veins at this time. Additional studies are required to identify patients with an individually increased risk of thrombosis in whom prophylactic doses of anticoagulants may be of maximum benefit.

Chemothromboprophylaxis in varicose vein surgery. A systematic review

INTRODUCTION

Venous Thromboembolism (VTE) is a possible complication after varicose vein surgery, reported after both open and endovascular interventions. Nonetheless, there are no internationally accepted recommendations regarding postoperative VTE prevention strategies, with some authors advocating for its use, while others recommend against it. This study aims to systematically review current evidence on the efficacy and safety of chemothromboprophylactic strategies after varicose vein surgery.

EVIDENCE ACQUISITION

A literature search was performed on the MEDLINE, Scopus, SciELO and Web of Science databases, which returned 532 studies. Ten studies were included. Data were extracted using piloted forms.

EVIDENCE SYNTHESIS

A total of 6929 patients were included for analysis, out of which 70.4% were treated by open surgery (n=4878) and 29.6% by endovenous procedures (n=2051; 79.1% EVLA; 20.9% RFA). VTE chemothromboprophylaxis was performed in 76.3% of the patients (n=5284), from which 62.5% were treated by open surgery (n=3301) and 37.5% by endovenous interventions (n=1983). Among those treated by open surgery, reported deep venous thrombosis (DVT) rates ranged between 0-6.25%, while pulmonary embolism (PE) was reported in 0-0.07% of the cases. Regarding endovenous interventions, EHIT and DVT rates ranged between 0-2.5% and 0-0.9%, respectively, with no cases of PE described. The remaining 23.7% of the patients did not underwent VTE chemothromboprophylaxis (n=1645), with DVT and PE rates after open surgery ranging between 0-5.17% and 0-1.48%, respectively. Only one study reported thrombotic complications after endovenous interventions in this subgroup of patients, with post-operative EHIT rates of 7.3%, and no information regarding PE or DVT. Bleeding complications were higher in patients undergoing chemothromboprophylaxis (0-10.2%) when compared to those who did not (0-0.18%), and were more frequent after endovenous interventions (0-10.2% versus 0-0.75% after open surgery).

CONCLUSIONS

VTE is a possible complication after both open and endovascular varicose vein procedures, although overall VTE complications occur less frequently after endovascular interventions. There's a clear heterogeneity regarding peri and postoperative chemoprophylaxis regimens used. Further studies are required to stratify risk factors and indications for chemothromboprophylaxis after varicose vein surgery.

Meta-analysis and systematic review of randomized controlled trials assessing the role of thromboprophylaxis after vascular surgery

BACKGROUND

Venous thromboembolism (VTE) is a well-known complication associated with surgical procedures. The implementation of thromboprophylaxis in this population has become a vital aspect of perioperative care to decrease VTE-associated morbidity and mortality risk. However, data assessing the role of thromboprophylaxis for patients undergoing vascular surgery are sparse. Assessing the role of thromboprophylaxis by low-molecular-weight heparin or unfractionated heparin in vascular surgery.

METHODS

We searched MEDLINE, Embase, and the Cochrane Collaboration Central Register of Controlled Trials from inception until December 2020, for randomized controlled trials assessing the role of thromboprophylaxis in vascular surgery.

RESULTS

Eight randomized controlled trials met inclusion criteria, including 3130 patients, with a mean age of 55.35 years and 45% were females. Compared with placebo, anticoagulant use was associated with a decrease in deep venous thrombosis (DVT) (risk ratio [RR], 0.34; 95% confidence interval [CI], 0.11-1.05; P = .06; I² = 68%) and pulmonary embolism (PE) (RR, 0.17; 95% CI, 0.02-1.22; P = .08; I² = 41%), but this trend did not attain statistical significance. There was no difference for bleeding outcomes between anticoagulants and placebo (RR, 0.90; 95% CI, 0.05-15.01; P = .94; I² = 76%). There was no significant difference in outcomes when low-molecular-weight heparin was compared directly with unfractionated heparin. In a sensitivity analysis, anticoagulant use was associated with a significant decrease in DVT or PE in patients undergoing venous surgeries, but was not associated with a significant decrease in DVT or PE in patients undergoing arterial surgeries, although this analysis was limited by the small number of studies in each group.

CONCLUSIONS

Among patients undergoing vascular surgery, thromboprophylaxis with anticoagulants showed a trend toward a lesser incidence of VTE when compared with placebo, although this difference was not statistically significant. Bleeding outcomes were comparable between both treatment groups.

A narrative review on the epidemiology, prevention, and treatment of venous thromboembolic events in the context of chronic venous disease

OBJECTIVE

Chronic venous disease (CVD) describes a spectrum of conditions associated with venous hypertension. The association between various CVD etiologies and the subsequent risk of venous thromboembolism (VTE), such as deep vein thrombosis or pulmonary embolism, is a topic of considerable clinical interest. The aims of the present review were to characterize the risk of VTE according to the CVD etiology and to determine the optimal anticoagulation strategy for the treatment or prevention of VTE in patients with CVD.

METHODS

An extensive search of the available surgical and medical data was conducted in PubMed and Google Scholar. We searched for the following terms and other related terms to identify relevant studies: CVD, chronic venous insufficiency, varicose veins, post-thrombotic syndrome (PTS), anticoagulation, venous thromboembolism, and venous disease scoring systems (eg, CEAP [clinical, etiology, anatomic, pathophysiology], Villalta, Ginsberg, venous clinical severity score). The identified studies included randomized control trials, retrospective and prospective observational studies, narrative and systematic reviews, case reports, and case series that contributed to the proposed aims. The ClinicalTrials.gov database was also queried to identify any relevant ongoing clinical trials.

RESULTS

Congenital CVD carries a heightened risk of VTE, although few higher level studies are available to inform on this topic or on the appropriate anticoagulation strategies for these patients. Noncongenital CVD seems to carry a heightened risk of VTE, although few studies have adequately differentiated between primary and secondary etiologies. Varicose veins are a risk factor for primary VTE but might not be associated with an increased risk of recurrent VTE. In the hospital setting, patients with varicosities should be provided thromboprophylaxis. In the setting of varicose vein intervention, high-risk patients should be identified using risk assessment models and receive thromboprophylaxis. The risk of recurrent VTE in the setting of PTS is unclear but indefinite anticoagulation is not currently indicated. For patients with PTS, residual vein thrombosis might be an indicator of when anticoagulation can be safely stopped, although practical limitations to its application exist.

CONCLUSIONS

CVD is associated with an increased risk of VTE. Few studies have differentiated between classes of CVD using a standardized method and have assessed the efficacy of anticoagulation prophylaxis against or treatment of VTE. Additional studies are needed to determine the optimal therapy for preventing and treating VTE in patients with active concurrent CVD.

Venous Thromboembolism Prophylaxis and Thrombotic Risk Stratification in the Varicose Veins Surgery-Prospective Observational Study

Background: An invasive phlebological treatment is still not free from complications such as thrombosis. As in other surgical populations, not only the treatment modality, but also patient condition-related venous thromboembolism (VTE) risk factors matter. The current protocols used in varicose vein surgery centers are based mostly on individual risk assessment as well as on an implementation and extrapolation of general surgery VTE prophylaxis guidelines. In the presented study, the efficacy of routine VTE pharmacological thromboprophylaxis in patients undergoing saphenous varicose vein surgery was prospectively evaluated. In the result assessment, VTE risk factor evaluation and Caprini score results were included; however, due to the limited size of the projected study group, as well as expected limited deep vein thrombosis (DVT) prevalence in this clinical scenario, it was not possible to perform the validation of the Caprini model efficacy in the projected study model. Methods: In the study, 141 patients undergoing saphenous vein stripping and miniphlebectomy in spinal anesthesia were included. In all of the patients, VTE risk factors (including Caprini score evaluation) were assessed, and the routine thromboprophylaxis with enoxaparin 40 mg for 10 days was used. The venous ultrasounds were undertaken before the surgery and on the 10th and 30th day after surgery. The study endpoint was the presence of symptomatic or asymptomatic DVT confirmed in the imaging study. The study safety endpoint was major bleeding occurrence intraoperatively or within 30 days after surgery. Results: The presence of a postoperative DVT was diagnosed in five cases (3.5%) In all of these cases, only distal DVT was confirmed. Despite extensive saphenous varicose vein surgery with stripping and miniphlebectomy performed in nontumescent but spinal anesthesia, no proximal lower leg episode was diagnosed. Three out of five DVT cases were diagnosed on day 10 postoperative control, while a further two were confirmed in the ultrasound examination performed 30 days after procedure. No clinically documented pulmonaly embolism (PE) as well as no bleeding episodes were noticed. Among the factors related to the statistically significant higher DVT occurrence, the results of the Caprini score were identified with odds ratio (OR) = 2.04 (95% CI = (0.998; 4.18)). Another factor that became statistically significant in terms of the higher postoperative DVT prevalence was the reported Venous Clinical Severity Score (VCSS) results (OR = 1.98; 95% CI (1.19; 3.26)). In the multiple logistic regression analysis, the patient age (OR = 0.86; 95% CI (0.75–0.99)), Caprini score evaluation results (OR = 4.04; 95% CI (1.26–12.9)) and VCSS results (OR = 2.4; 95% CI (1.23–4.7)) were of statistical significance as predictors for postoperative DVT occurrence, with a p value of 0.029 for age, and p = 0.017 and p = 0.009 for Caprini score results and VCSS results, respectively. Due to the confirmed limited number of the DVT events in our study cohort, as well as the descriptive and explorative nature of the achieved results, the final clinical potential and significance of the identified parameters, including Caprini score rate and VCSS rate, should be interpreted with caution and studied in the further trials in these clinical settings. Conclusion: All the patients undergoing varicose vein surgery should undergo VTE risk evaluation based on the individual assessment. In VTE risk evaluation, patient and surgical procedure characteristics based on the factors included into the Caprini score but also on specific chronic venous disease-related factors should be taken into consideration. Further studies are needed to propose an objective and validated VTE risk assessment model, as well as a validated antithrombotic prophylaxis protocol in this particular patient group.

Systematic review on the benefit of graduated compression stockings in the prevention of venous thromboembolism in low-risk surgical patients

Objectives

The aim of this systematic review is to assess the performance of graduated compression stockings (GCS) in comparison to no venous thromboembolism (VTE) prophylaxis in the prevention of hospital-acquired thrombosis in low-risk surgical patients undergoing short-stay procedures.

Methods

Aligning with PRISMA guidelines, online databases MEDLINE and EMBASE, Cochrane Library® and trial registries were searched. Eligible articles reported the VTE rate in low-risk surgical patients either receiving GCS or no VTE prophylaxis.

Results

Narrative synthesis was performed on a single eligible article. The included study arm consisted of participants undergoing knee arthroscopy with the use of GCS alone reporting a total of 29 VTE events (4.4%), 16 of which were asymptomatic DVTs (2.4%).

Conclusion

There is a complete lack of evidence to support the use of GCS in the prevention of HAT for low-risk surgical patients. An adequately powered trial is required to provide level-IA evidence to support this practice.

A meta-analysis and systematic review of venous thromboembolism prophylaxis in patients undergoing vascular surgery procedures

OBJECTIVE

Perioperative venous thromboembolism (VTE) is generally considered preventable. Whereas the non-vascular surgery literature is rich in providing data about the impact of VTE prophylaxis on VTE outcomes, vascular surgery data are relatively sparse on this topic. This study sought to evaluate the evidence for VTE prophylaxis specifically for the population of vascular surgery patients.

METHODS

A systematic search was conducted in MEDLINE, Cochrane, and Embase databases in December 2018. Included were studies reporting primary and secondary outcomes for common vascular surgery procedures (open aortic operation, endovascular aneurysm repair [EVAR], peripheral artery bypass, amputation, venous reflux operation). A meta-analysis was performed comparing the patients who did not receive VTE prophylaxis and had VTE complications with patients who developed VTE despite receiving prophylaxis.

RESULTS

From 3757 uniquely identified articles, 42 publications met the criteria for inclusion in this review (1 for the category of all vascular operations, 5 for open aortic reconstructions, 2 for EVAR, 1 for open aortic surgery or EVAR, 3 for abdominal or bypass surgery, 2 for peripheral bypass surgery, 2 for amputations, 1 for vascular trauma, and 25 for surgical treatment of superficial venous disease). Five studies met the criteria for inclusion in the meta-analysis. The results demonstrated slightly lower relative risk for development of VTE among patients receiving VTE prophylaxis (relative risk, 0.70; 95% confidence interval, 0.26-1.87). After open aortic reconstruction, the risk of VTE is 13% to 18% and is not reduced by VTE prophylaxis. For EVAR patients, the risk of VTE without prophylaxis is 6%. For patients undergoing peripheral bypass surgery and not receiving therapeutic or prophylactic anticoagulation, the risk of VTE is <2%. For patients undergoing amputations, VTE prophylaxis reduces the risk of VTE. For patients undergoing surgical treatment of superficial venous disease, there is an abundance of literature exploring the utility of VTE prophylaxis, but the evidence is conflicting; some studies demonstrated a benefit, whereas others showed no reduction of VTE with prophylaxis.

CONCLUSIONS

Overall, there is a paucity of literature that addresses the effectiveness of VTE prophylaxis specifically in the population of vascular surgery patients. Our meta-analysis of the literature does not demonstrate a statistically significant benefit of VTE prophylaxis among the vascular surgery patients evaluated; however, it does suggest a low incidence of VTE among patients who receive VTE prophylaxis. Clinicians should identify the patients at high risk for development of postoperative VTE as the risk-benefit ratio may favor VTE prophylaxis in a selected group of patients. Clinicians should use their judgment and established VTE risk prediction models to assess VTE risk for patients. Vascular surgeons should consider reporting VTE incidence as a secondary outcome in publications.

Thromboprophylaxis for varicose vein procedures – A national survey

Background

Venous thromboembolism is rare following varicose vein ablation procedures, but uncertainty about its incidence combined with a lack of evidence-based clinical guidelines regarding thromboprophylaxis has led to debate about best practice. We conducted a national survey to investigate current practice among Irish vascular surgeons.

Methods

An anonymous online questionnaire was emailed to all members of the Irish Association of Vascular Surgeons and the Northern Ireland Vascular Society.

Results

Response rate was 60%. With regard to procedure type, 36.7% of respondents use only endovenous techniques and 53% use a combination of open and endovenous. Formal duplex imaging on all patients is obtained by 53.3%. With regard to VTE prevention, 73.3% always give thromboprophylaxis. For those who give it selectively, a variety of factors were considered as risks. Pharmacological agents used are enoxaparin in 73.3% of cases or tinzaparin, and 71.4% use a single dose (either 20/40 mg or 3500/4500 IU respectively). If patients are already taking anticoagulation, this is continued by 46.7% of respondents. Routine post procedure duplex imaging is carried out by 23.1% of recipients, either by the surgeon or formally and 80% review patients clinically. Moreover, 43.3% of respondents claim to know their post-operative VTE rate and this varies from 0 to 1% with one mortality reported.

Conclusions

The majority of respondents use single-dose thromboprophylaxis periprocedurally for varicose vein ablation procedures. VTE rates are low but the true incidence may be unknown.

Graduated compression stockings for the prevention of deep-vein thrombosis in postoperative surgical patients: a systematic review and economic model with a value of information analysis

BACKGROUND

Deep-vein thrombosis (DVT) can occur in surgical patients. Routine prophylaxis can be pharmacological and/or mechanical [e.g. graduated compression stockings (GCSs)]. GCSs are available in knee length or thigh length.

OBJECTIVE

To establish the expected value of undertaking additional research addressing the relative effectiveness of thigh-length GCSs versus knee-length GCSs, in addition to pharmacoprophylaxis, for prevention of DVT in surgical patients.

DESIGN

Systematic review and economic model, including value of information (VOI) analysis.

REVIEW METHODS

Randomised controlled trials (RCTs) assessing thigh- or knee-length GCSs in surgical patients were eligible for inclusion. The primary outcome was incidence of DVT. DVT complications and GCSs adverse events were assessed. Random-effects meta-analysis was performed. To draw on a wider evidence base, a random-effects network meta-analysis (NMA) was undertaken for the outcome DVT. A review of trials and observational studies of patient adherence was also conducted. A decision-analytic model was developed to assess the cost-effectiveness of thigh- and knee-length GCSs and the VOI.

RESULTS

Twenty-three RCTs were included in the review of effectiveness. There was substantial variation between trials in terms of the patient characteristics, interventions and methods of outcome assessment. Five trials comparing knee-length with thigh-length GCSs with or without pharmacoprophylaxis were pooled; the summary estimate of effect indicated a non-significant trend favouring thigh-length GCSs [odds ratio (OR) 1.48, 95% confidence interval (CI) 0.80 to 2.73]. Thirteen trials were included in the NMA. In the base-case analysis, thigh-length GCSs with pharmacoprophylaxis were more effective than knee-length GCSs with pharmacoprophylaxis (knee vs. thigh OR 1.76, 95% credible interval 0.82 to 3.53). Overall, thigh-length stockings with pharmacoprophylaxis was the most effective treatment, with a 0.73 probability of being the most effective treatment in a new trial of all the treatments. Patient adherence was generally higher with knee-length GCSs, and patients preferred knee-length GCSs. Thigh-length GCSs were found to be cost-effective in all but the subgroup with the lowest baseline risk, although the absolute differences in costs and effects were relatively small. The expected value of perfect information ranged from £0.2M to £178.0M depending on the scenario and subgroup. The relative effect parameters had the highest expected value of partial perfect information and ranged from £2.0M to £39.4M. The value of further research was most evident in the high-risk subgroups.

LIMITATIONS

There was substantial variation across the included trials in terms of patient and intervention characteristics. Many of the included trials were old and poorly reported, which reduces the reliability of the results of the review.

CONCLUSIONS

Given that the results from both the standard meta-analysis and the NMA lacked precision (CIs were wide) owing to the heterogeneous evidence base, a new definitive trial in high-risk patients may be warranted. However, the efficiency of any further research (i.e. whether this represents value for money) is dependent on several factors, including the acquisition price of GCSs, expected compliance with thigh-length GCSs wear, and whether or not uncertainty can be resolved around possible effect modifiers, as well as the feasibility and actual cost of undertaking the proposed research.

STUDY REGISTRATION

This study is registered as PROSPERO CRD42014007202.

FUNDING

The National Institute for Health Research Health Technology Assessment programme.

Incidence and risk factors of early deep venous thrombosis after varicose vein surgery with routine use of a tourniquet

INTRODUCTION

The incidence of early deep venous thrombosis (DVT) following varicose vein surgery (traditional open stripping) with routine use of a tourniquet remains unknown.

MATERIALS AND METHODS

A retrospective analysis of all patients who underwent varicose vein surgery with a tourniquet in the authors' unit between 1 January 2012 and 30 November 2013 was undertaken. Cases of postoperative DVT were identified from the unit database, and re-assessments conducted 1, 3 and 6 months after the initial diagnosis were recorded from the outpatient department.

RESULTS

Out of 1461 patients, 113 (7.7%) developed postoperative DVT. Nineteen (1.3%) patients had proximal DVT, and 94 (6.4%) patients had isolated distal DVT. The risk factors for postoperative DVT included old age (≥65 years), female sex and gastrocnemius vein dilation (GVD). GVD was found to be a significant independent risk factor for the occurrence of DVT, with an odds ratio of 2.437 (95% confidence interval 1.644-3.611). Five patients with distal DVT (5.7%) and eight patients with proximal DVT (44.4%) still exhibited a thrombus at 6-month follow-up, but with decreased size and at various stages of resolution.

CONCLUSIONS

This study found a higher incidence of postoperative DVT (7.7%) with routine use of a tourniquet during varicose vein surgery than has been reported previously. Among the factors examined, GVD had the highest predictive power for postoperative DVT. Both distal and proximal DVT were associated with acceptable outcomes.

The additional benefit of graduated compression stockings to pharmacologic thromboprophylaxis in the prevention of venous thromboembolism in surgical inpatients

OBJECTIVE

The evidence base supporting the use of graduated compression stockings (GCS) for venous thromboembolism (VTE) prevention has been challenged, and there appears to be a lack of evidence for the additional benefit of GCS to pharmacologic thromboprophylaxis. This study aimed to summarize and quality assess the existing evidence concerning whether GCS offer a significant benefit in addition to pharmacologic thromboprophylaxis in surgical inpatients.

METHODS

A systematic review of published literature was performed. Inclusion criteria were (1) randomized controlled trials (RCTs), (2) surgical inpatients, (3) study arms examining prophylactic-dose pharmacologic thromboprophylaxis alone or in conjunction with GCS, and (4) outcome of VTE.

RESULTS

In the review, 1025 articles were screened, of which 27 RCTs were included. Six RCT study arms included patients with GCS in conjunction with pharmacologic thromboprophylaxis, whereas 22 RCT study arms included patients treated with pharmacologic thromboprophylaxis alone. One RCT had both of its study arms included in the systematic review. The total number of patients that received pharmacologic thromboprophylaxis alone was 12,481. Of these patients, 1292 (10.4%) suffered VTE. The total number of patients that received GCS in conjunction with pharmacologic thromboprophylaxis was 1283. Of these patients, 75 had VTE (5.8%). Heterogeneity analysis demonstrated that the results of included study arms were significantly heterogeneous, precluding a valid summation analysis.

CONCLUSIONS

The additional benefit of GCS to pharmacologic thromboprophylaxis in surgical inpatients is not clear on the basis of existing data. Further clinical trials directly evaluating this clinical question are recommended.

Outcome of endovenous laser ablation of varicose veins

Introduction:

In Bosnia and Herzegovina according to available data, treatment of incompetent superficial lower extremity varicose veins by endovenous laser ablation (EVLA) has been introduced two years ago and so far no paper has been published regarding results of EVLA treatment of patients from our country. We wanted to present our results with EVLA treatment.

Aim of study:

to evaluate and compare primary posttreatment outcomes of endovenous laser ablation (EVLA) with classical surgical method of varicose vein treatment.

Patients and methods:

The study was clinical and prospective. It was carried out at Clinic for vascular surgery in Sarajevo where fifty-eight (58) patients received surgical treatment for varicose veins and in Aesthetic Surgery Center “Nasa mala klinika” in Sarajevo were sixty-one (61) patients with varicose veins were treated by endovenous laser ablation. Total 119 patients (limbs) with pathologic reflux only in great saphenous vein were evaluated between 1st of January 2013 and 31st of April 2014. Following primary outcome endpoints were evaluated smean day of return to normal everyday activities, patient subjective quantification of pain during first seven days after intervention, incidence of deep venous thrombosis (DVT), incidence of wound bleeding requiring surgical intervention, incidence of peri-saphenous vein hematoma and infection rate.

Results:

Mean of return to normal activities (expressed in days after intervention); EVLA vs. stripping (surgery) =1.21vs12.24, T test 13,619; p=0, 000, p<0,05. T test was used for comparing Mean value of visual pain analog scale for the first 7 days between groups, for all seven days pain was significantly higher in surgical group of patients as compared to EVLA group; p<0,05. Incidence of hematoma greater than 1% of total body surface area was significantly higher in patients receiving surgical treatment; Pearson Chi Square=23,830, p<0,05; odds ratio:10,453. Incidences of infection, deep venous thrombosis and posttreatment bleeding were not statistically different between analyzed groups; EVLA vs Surgery (Pearson Chi Square =3,237; p>0,05; Pearson Chi Square=2,139, p>0,05, Pearson Chi Square=2,139, p>0,05, respectively.)

Conclusion:

EVLA offers better patient recovery in terms of significantly lower post treatment pain, faster return to everyday activities and lower incidence of bruising (hematomas).

The utility of venous thromboembolism risk assessment models in general and vascular surgery

Venous thromboembolism (VTE) is a common postsurgical complication, the incidence of which can be reduced with the use of various prophylactic measures. Proper use of these measures requires an understanding of each individual patient's risk of VTE. Risk assessment models have been developed to aid clinicians in quantifying the likelihood of an individual VTE formation. In this review, we discuss several models of risk assessment for general and vascular surgery patients with a focus on both sensitivity and prospective validation by external sources. In addition, strategies to improve proper implementation of prophylactic measures are highlighted.

Thermal ablation of saphenous veins is feasible and safe in patients older than 75 years: A prospective study (EVTA study)

OBJECTIVES

To investigate the tolerance and safety of thermal ablation (TA), consisting of radiofrequency or endovenous laser (EVLA) of saphenous veins (SV) in elderly (group 1 ≥75 years), compared with a control group (group 2 <75 years).

METHOD

An Observational multicenter-prospective study was conducted, under the aegis of the French and Swiss Societies of Phlebology (18 centers). Ninety patients were included in group 1, 617 in group 2 (mean age 80 years and 53 years; 69% women in both groups), representing 863 SV. Mean trunk diameters were similar in both groups (small SV: 6 mm; great SV: 7 mm). In group 1, comorbidities were more frequent, particularly cardiac insufficiency, diabetes, history of thrombosis, and CEAP clinical class was significantly higher.

RESULTS

EVLA was used in 86% of cases. Settings used were similar in both groups for each technique. Only 6% of TA was performed in an operating room for group 1 (14% group 2). Tumescent local anaesthesia (TLA) alone was used in 91% of cases in group 1 (85% group 2). The mean pain score was only 1.6 for the procedure itself (VASP 0-10; 10 max.) and 1.4 for the 10 days following the procedure. Side effects were few, but rate of paraesthesia was higher when general anaesthesia was used (11.8%) compared with TLA alone (2.2%). At three months, 100% of SV was occluded in group 1 (99.5% group 2), with high satisfaction score (9.3/10).

CONCLUSION

TA is safe and effective in elderly; it should be performed strictly under TLA to minimize side effects.