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Cook IO, Mayor JM, Mills JL. A Review of WIfI Clinical Staging to Predict Outcomes in Patients With Threatened Limbs. Ann Vasc Surg 2024:S0890-5096(24)00157-2. [PMID: 38583759 DOI: 10.1016/j.avsg.2024.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 01/01/2024] [Indexed: 04/09/2024]
Abstract
The Society for Vascular Surgery Wound, Ischemia, and foot Infection's (WIfI's) threatened limb classification system serves to comprehensively assess the severity of disease in patients with chronic limb-threatening ischemia by identifying and grading the main factors that place the threatened limb at greatest risk: wound severity, ischemic burden, and presence of infection. Each of these 3 factors is graded and the limb placed into a clinical stage, with increasing stage associated with severity of limb threat and predicted risk of major limb amputation at 1 year. Globally, there is a growing body of evidence reported from multiple institutions that has assessed amputation rates and wound-healing outcomes following revascularization in patients with WIfI clinical staging. Risk of major amputation at 1 year is low in clinical stage 1, moderate in stages 2 and 3, and high in stage 4. Higher clinical stages are associated with prolonged time to wound healing, while 1-year wound healing rates consistently decrease with increasing clinical stage. Additional avenues of investigation utilizing WIfI as an objective clinical staging tool have yielded new insights into which patients benefit from revascularization, complexity of care, hospital length of stay, quality of life, ethnic and socioeconomic disparities, as well as spurred interest in other modalities of assessing limb perfusion and their possible clinical utility. Ongoing study and refinement of WIfI grading and clinical staging will continue to improve its prognostic utility.
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Affiliation(s)
- Ian O Cook
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX
| | - Jessica M Mayor
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of Texas Health Science Center at San Antonio, San Antonio, TX
| | - Joseph L Mills
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX.
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Beucler A, Wheibe E, Gandhi SS, Blas JV, Carsten CG, Gray BH. Outcomes of Endovascular Treatment for Critical Limb Threatening Ischemia. Ann Vasc Surg 2024; 99:434-441. [PMID: 37922961 DOI: 10.1016/j.avsg.2023.09.077] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/21/2023] [Accepted: 09/24/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND Critical limb threatening ischemia (CLTI), particularly in patients with ischemic ulceration has been associated with significant morbidity and mortality. Typically, endovascular therapy has been first-line therapy for our patients, but this strategy has come into question based upon the Best Endovascular versus Best Surgical Therapy in Patients with Critical Limb Threatening Ischemia (BEST-CLI) trial data. METHODS AND RESULTS For comparative purposes, we evaluated outcomes from 150 CLTI patients with ischemic ulceration treated with endovascular-first therapy. The mean age was 72 years in this predominate male, Caucasian, ambulatory group. The major co-morbidities were smoking history in 49% and diabetes mellitus in 67%.` Anatomic scoring, using Society for Vascular Surgery criteria, revealed only 35.6% had favorable anatomy (Global Limb Anatomical Staging System stage of 0,1) for long-term patency compared to 64.4% of limbs with unfavorable anatomy for long-term patency (Global Limb Anatomical Staging System stage 2,3). Stents were used in 47% of cases. Reintervention occurred in 36% over 24 months follow-up. At 12 and 24 months, the Kaplan-Meier projections for survival was 0.80 (0.73, 0.87) and 0.69 (0.59, 0.79); amputation was 0.69 (0.61, 0.77) and 0.59 (0.46, 0.71); amputation-free survival (AFS) was 0.56 (0.48, 0.65) and 0.38 (0.27, 0.50), respectively. Amputation was more common in those with reinterventions (P = 0.033). Mortality was predicted with ankle brachial index ≤0.40 or ≥1.30 (P = 0.0019) and the presence of infection (P = 0.0047). AFS was predicted by the presence of any infection (P = 0.0001). CONCLUSIONS Despite technically successful endovascular treatment, patients who present with CLTI maintain a high-risk for limb loss and mortality. Amputation prevention must vigilantly address infection risk. These data correlate with outcomes from BEST-CLI trial enhancing applicability to patient-centered care.
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Affiliation(s)
- Adam Beucler
- Department of Vascular Surgery/Medicine, Prisma Health System, Greenville, SC
| | - Elias Wheibe
- University of Cincinnati, School of Medicine, Cincinnati, OH
| | - Sagar S Gandhi
- University of Cincinnati, School of Medicine, Cincinnati, OH
| | - Joseph Vv Blas
- University of Cincinnati, School of Medicine, Cincinnati, OH
| | | | - Bruce H Gray
- Department of Vascular Surgery/Medicine, Prisma Health System, Greenville, SC.
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Godoy MR, Brochado-Neto FC, Matielo MF, Martins Cury MV, Manzioni R, Sacilotto R. The value of Wound, Ischemia and foot Infection classification in patients undergoing endovascular therapy. J Vasc Surg 2023; 78:1260-1269. [PMID: 37541557 DOI: 10.1016/j.jvs.2023.07.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/03/2023] [Accepted: 07/22/2023] [Indexed: 08/06/2023]
Abstract
OBJECTIVE This study aimed to evaluate the correlation between the Society for Vascular Surgery (SVS) Wound, Ischemia and foot infection (WIfI) classification system and clinical outcomes for 1-year limb amputation-free survival (AFS), freedom from reintervention, and wound healing rate in a cohort of patients affected by chronic limb-threatening ischemia treated exclusively by endovascular procedures. METHODS We analyzed a prospective, consecutive cohort of 203 patients (203 limbs) who underwent infrainguinal endovascular revascularization at a single center between March 2018 and January 2021. These patients were stratified into clinical stages 1 to 4 based on the SVS WIfI classification and categorized into two groups: WIfI 1 to 3 (n = 101 limbs) and WIfI 4 (n = 102 limbs). The SVS objective performance goals of 1-year limb AFS, freedom from reintervention, and wound healing were compared between the groups and assessed using the Kaplan-Meier method. Angiographic lesion characteristics and angioplasty details were compared. RESULTS The average age was 72.4 years (44.3% male, 85.2% had hypertension, 80.3% had diabetes, and 87.7% had tissue loss). There were statistical differences between the groups in 1-year limb AFS Kaplan-Meier rate between WIfI clinical stages 1 to 3 group and WIfI clinical stage 4 group (82% vs 66%, respectively; P < .001), but there was no statistical difference in freedom from reintervention and wound healing rates between the groups (70% vs 64% [P = .62] and 74% vs 79% [P = .90], respectively). Owing to angiographic lesion characteristics, femoropopliteal and infrapopliteal segment distributions were similar between the groups, but there was a statistical difference in target lesion location to tibial vessels (55.4% vs 71.6%, respectively; P = .025). CONCLUSIONS In this cohort of patients with chronic limb-threatening ischemia, SVS WIfI clinical stage 4 had worse results in the 1-year limb AFS rate, but there was no statistical difference in freedom from reintervention and wound healing rates between the groups.
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Affiliation(s)
- Marcos Roberto Godoy
- Department of Vascular and Endovascular Surgery - Institute of Medical Assistance to the State Public Servant, Sao Paulo, Sao Paulo, Brazil
| | - Francisco Cardoso Brochado-Neto
- Department of Vascular and Endovascular Surgery - Institute of Medical Assistance to the State Public Servant, Sao Paulo, Sao Paulo, Brazil
| | - Marcelo Fernando Matielo
- Department of Vascular and Endovascular Surgery - Institute of Medical Assistance to the State Public Servant, Sao Paulo, Sao Paulo, Brazil.
| | - Marcus Vinícius Martins Cury
- Department of Vascular and Endovascular Surgery - Institute of Medical Assistance to the State Public Servant, Sao Paulo, Sao Paulo, Brazil
| | - Renato Manzioni
- Department of Vascular and Endovascular Surgery - Institute of Medical Assistance to the State Public Servant, Sao Paulo, Sao Paulo, Brazil
| | - Roberto Sacilotto
- Department of Vascular and Endovascular Surgery - Institute of Medical Assistance to the State Public Servant, Sao Paulo, Sao Paulo, Brazil
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Berchiolli R, Bertagna G, Adami D, Canovaro F, Torri L, Troisi N. Chronic Limb-Threatening Ischemia and the Need for Revascularization. J Clin Med 2023; 12:jcm12072682. [PMID: 37048765 PMCID: PMC10095037 DOI: 10.3390/jcm12072682] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 04/14/2023] Open
Abstract
BACKGROUND Patients presenting with critical limb-threatening ischemia (CLTI) have been increasing in number over the years. They represent a high-risk population, especially in terms of major amputation and mortality. Despite multiple guidelines concerning their management, it continues to be challenging. Decision-making between surgical and endovascular procedures should be well established, but there is still a lack of consensus concerning the best treatment strategy. The aim of this manuscript is to offer an overview of the contemporary management of CLTI patients, with a focus on the concept that evidence-based revascularization (EBR) could help surgeons to provide more appropriate treatment, avoiding improper procedures, as well as too-high-risk ones. METHODS We performed a search on MEDLINE, Embase, and Scopus from 1 January 1995 to 31 December 2022 and reviewed Global and ESVS Guidelines. A total of 150 articles were screened, but only those of high quality were considered and included in a narrative synthesis. RESULTS Global Vascular Guidelines have improved and standardized the way to classify and manage CLTI patients with evidence-based revascularization (EBR). Nevertheless, considering that not all patients are suitable for revascularization, a key strategy could be to stratify unfit patients by considering both clinical and non-clinical risk factors, in accordance with the concept of individual residual risk for every patient. The recent BEST-CLI trial established the superiority of autologous vein bypass graft over endovascular therapy for the revascularization of CLTI patients. However, no-option CLTI patients still represent a critical issue. CONCLUSIONS The surgeon's experience and skillfulness are the cornerstones of treatment and of a multidisciplinary approach. The recent BEST-CLI trial established that open surgical peripheral vascular surgery could guarantee better outcomes than the less invasive endovascular approach.
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Affiliation(s)
- Raffaella Berchiolli
- Vascular Surgery Unit, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Giulia Bertagna
- Vascular Surgery Unit, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Daniele Adami
- Vascular Surgery Unit, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Francesco Canovaro
- Vascular Surgery Unit, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Lorenzo Torri
- Vascular Surgery Unit, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Nicola Troisi
- Vascular Surgery Unit, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
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Chen Z, Tan TW, Zhao Y, Jiang C, Zeng Q, Fan G, Zhang W, Li F. WIfI Classification Based Analysis of Risk Factors for Outcomes in Patients with Chronic Limb Threatening Ischaemia after Endovascular Revascularisation Therapy. Eur J Vasc Endovasc Surg 2023; 65:528-536. [PMID: 36592652 DOI: 10.1016/j.ejvs.2022.12.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 11/30/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The evaluation of limb status with the Wound, Ischaemia, and foot Infection (WIfI) classification and the assessment of patient risks combined with systemic factors, are recommended in patients with chronic limb threatening ischaemia (CLTI). However, there is little evidence of the application of the WIfI classification in the Chinese population. This study aimed to verify the use of the WIfI classification in a Chinese patient population, and to further identify local and systemic independent predictors of adverse CLTI outcomes. METHODS A total of 474 patients who underwent endovascular therapy (EVT) for CLTI in a tertiary hospital between July 2017 and September 2020 were included in this retrospective study. The outcomes included one year major adverse limb events (MALEs), one year all cause mortality, and one year amputation free survival (AFS). Cox regression was used to analyse the association between risk factors and adverse outcomes. RESULTS In total, 104 (21.9%) all cause deaths were recorded. The rate of MALEs was 17.5%, while the AFS was 71.9%. Multivariable analysis revealed that a body mass index (BMI) < 18.5 kg/m2 (p = .002), a left ventricular ejection fraction (LVEF) < 50% (p < .001), and WIfI wound grade (p < .001) were independent risk factors for MALEs, while age ≥ 77 years (p = .031), BMI < 18.5 kg/m2 (p < .001), coronary heart disease (p = .040), and WIfI clinical stages (p = .021) were independent risk factors for death in patients with CLTI. Age ≥ 77 years (p = .003), BMI < 18.5 kg/m2 (p < .001), coronary heart disease (p = .012), LVEF < 50% (p < .001), WIfI wound grade (p = .004), and WIfI clinical stages (p = .044) were independently associated with a decreased AFS rate. CONCLUSIONS This study has confirmed the predictive ability of the WIfI classification for Chinese patients with CLTI who underwent EVT. Wound grade was the most sensitive and important risk factor of the three components of WIfI. In addition, systemic factors should be considered to ensure a more accurate prognosis prediction and appropriate clinical decision making in patients with CLTI.
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Affiliation(s)
- Zheng Chen
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tze-Woei Tan
- Division of Vascular Surgery, Department of Surgery, University of Arizona College of Medicine, Tucson, AZ, USA
| | - Yu Zhao
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chuli Jiang
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qiu Zeng
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Gaoxiang Fan
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Zhang
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Fenghe Li
- Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
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Jaramillo EA, Smith EJT, Matthay ZA, Sanders KM, Hiramoto JS, Gasper WJ, Conte MS, Iannuzzi JC. Racial and ethnic disparities in major adverse limb events persist for chronic limb threatening ischemia despite presenting limb threat severity after peripheral vascular intervention. J Vasc Surg 2023; 77:848-857.e2. [PMID: 36334848 DOI: 10.1016/j.jvs.2022.10.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 12/04/2022]
Abstract
OBJECTIVE Racial and ethnic disparities have been well-documented in the outcomes for chronic limb threatening ischemia (CLTI). One purported explanation has been the disease severity at presentation. We hypothesized that the disparities in major adverse limb events (MALE) after peripheral vascular intervention (PVI) for CLTI would persist despite controlling for disease severity at presentation using the WIfI (Wound, Ischemia, foot Infection) stage. METHODS The Vascular Quality Initiative PVI dataset (2016-2021) was queried for CLTI. Patients were excluded if they were missing the WIfI stage. The primary end point was the incidence of 1-year MALE, defined as major amputation (through the tibia or fibula or more proximally) or reintervention (endovascular or surgical) of the initial treatment limb. A multivariate hierarchical Fine-Gray analysis was performed, controlling for hospital variation, competing risk of death, and presenting WIfI stage, to assess the independent association of Black/African American race and Latinx/Hispanic ethnicity with MALE. A Cox proportional hazard regression model was used for the 1-year survival analysis. RESULTS Overall, 47,830 patients (60%) had had WIfI scores reported (73% White, 20% Black, and 7% Latinx). The 1-year unadjusted cumulative incidence of MALE was 13.1% (95% confidence interval [CI], 12.6%-13.5%) for White, 14.3% (95% CI, 13.5%-15.3%) for Black, and 17.0% (95% CI, 15.3%-18.9%) for Latinx patients. On bivariate analysis, the occurrence of MALE was significantly associated with younger age, Black race, Latinx ethnicity, coronary artery disease, cerebrovascular disease, congestive heart failure, hypertension, diabetes, dialysis, intervention level, any prior minor or major amputation, and WIfI stage (P < .001). The cumulative incidence of 1-year MALE increased by increasing WIfI stage: stage 1, 11.7% (95% CI, 10.9%-12.4%); stage 2, 12.4% (95% CI, 11.8%-13.0%); stage 3, 14.8% (95% CI, 13.8%-15.8%); and stage 4, 15.4% (95% CI, 14.3%-16.6%). The cumulative incidence also increased by intervention level: inflow, 10.7% (95% CI, 9.8%-11.7%), femoropopliteal, 12.3% (95% CI, 11.7%-12.9%); and infrapopliteal, 14.1% (95% CI, 13.5%-14.8%). After adjustment for WIfI stage only, Black race (subdistribution hazard ratio [SHR], 1.30; 95% CI, 1.17-1.44; P < .001) and Latinx ethnicity (SHR, 1.58; 95% CI, 1.37-1.81; P < .001) were associated with an increased 1-year hazard of MALE compared with White race. On adjusted multivariable analysis, MALE disparities persisted for Black/African American race (SHR, 1.12; 95% CI, 1.01-1.25; P = .028) and Latinx/Hispanic ethnicity (SHR, 1.34; 95% CI, 1.16-1.54; P < .001) compared with White race. CONCLUSIONS Black/African American and Latinx/Hispanic patients had a higher associated hazard of MALE after PVI for CLTI compared with White patients despite an adjustment for WIfI stage at presentation. These results suggest that disease severity at presentation does not account for disparities in outcomes. Further work should focus on better understanding the underlying mechanisms for disparities in historically marginalized racial and ethnic groups presenting with CLTI.
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Affiliation(s)
- Emanuel A Jaramillo
- Department of Surgery, University of California, San Francisco-East Bay, Oakland, CA; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - Eric J T Smith
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - Zachary A Matthay
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - Katherine M Sanders
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - Jade S Hiramoto
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - Warren J Gasper
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - Michael S Conte
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA
| | - James C Iannuzzi
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, San Francisco, CA.
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Ahmed Z, Raza MZ, Worrall AP, Kheirelseid E, Naughton P, Moneley D, McHugh S. SVS WIfI score as a predictor of amputation after onset of CLI: Validation in an Irish tertiary vascular unit. Surgeon 2023; 21:48-53. [PMID: 35337751 DOI: 10.1016/j.surge.2022.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 01/16/2022] [Accepted: 02/09/2022] [Indexed: 02/01/2023]
Abstract
INTRODUCTION Critical limb ischemia (CLI) in diabetic patients is defined by non-healing foot ulcer or rest pain for more than 2 weeks with ankle pressure of less than 40 mmHg. The SVS WIfI classification system stratifies CLI on the basis of perfusion, extent of wound and superadded infection to provide a composite score which guides further management and predicts final prognosis OBJECTIVE: The aim of the study was to use the SVS WIfI scoring system to predict the need for early revascularization versus early amputation depending on the composite WIfI score at presentation. METHODOLOGY This was a retrospective observational study. Data was collected on patients admitted with CLI, in the last 2 years, to calculate composite WIfI score. The WIfI categories according to risk of limb loss were identified with endpoint being major or minor amputation. RESULTS Among the 87 patients reviewed, 35 patients (40%) required major amputation, and 29 of those underwent vascular intervention (83%) as part of their care. Median age of the cohort was 72 and 71% were male patients. Comparative analysis between major amputations and minor amputation showed the median score on initial clinical presentation to be 7 in major amputation and 5 in minor amputations (p < 0.0001). CONCLUSION The composite WIFi score (a summation of the Wound, Ischaemia, and Infection sub-scores) was a good predictor of need for an amputation WIfI scoring system is a useful tool and should be used early in the management of infected ischaemic limbs.
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Affiliation(s)
- Zeeshan Ahmed
- Department of Vascular Surgery, Beaumont Hospital, Dublin 9, Ireland.
| | | | - Amy P Worrall
- Department of Vascular Surgery, Beaumont Hospital, Dublin 9, Ireland
| | | | - Peter Naughton
- Department of Vascular Surgery, Beaumont Hospital, Dublin 9, Ireland
| | - Daragh Moneley
- Department of Vascular Surgery, Beaumont Hospital, Dublin 9, Ireland
| | - Seamus McHugh
- Department of Vascular Surgery, Beaumont Hospital, Dublin 9, Ireland
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Huang J, Wu J, Wang J, Xu M, Jiao J, Qiang Y, Zhang F, Li Z. Rock Climbing-Inspired Electrohydrodynamic Cryoprinting of Micropatterned Porous Fiber Scaffolds with Improved MSC Therapy for Wound Healing. ADVANCED FIBER MATERIALS 2023; 5:312-326. [DOI: 10.1007/s42765-022-00224-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/09/2022] [Indexed: 10/28/2023]
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Pan T, Jiang X, Liu H, Liu Y, Fu W, Dong Z. Prediction of 2-Year Major Adverse Limb Event-Free Survival After Percutaneous Transluminal Angioplasty and Stenting for Lower Limb Atherosclerosis Obliterans: A Machine Learning-Based Study. Front Cardiovasc Med 2022; 9:783336. [PMID: 35224037 PMCID: PMC8863671 DOI: 10.3389/fcvm.2022.783336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 01/06/2022] [Indexed: 11/23/2022] Open
Abstract
Background The current scoring systems could not predict prognosis after endovascular therapy for peripheral artery disease. Machine learning could make predictions for future events by learning a specific pattern from existing data. This study aimed to demonstrate machine learning could make an accurate prediction for 2-year major adverse limb event-free survival (MFS) after percutaneous transluminal angioplasty (PTA) and stenting for lower limb atherosclerosis obliterans (ASO). Methods A lower limb ASO cohort of 392 patients who received PTA and stenting was split to the training set and test set by 4:1 in chronological order. Demographic, medical, and imaging data were used to build machine learning models to predict 2-year MFS. The discrimination and calibration of artificial neural network (ANN) and random forest models were compared with the logistic regression model, using the area under the receiver operating curve (ROCAUC) with DeLong test, and the calibration curve with Hosmer–Lemeshow goodness-of-fit test, respectively. Results The ANN model (ROCAUC = 0.80, 95% CI: 0.68–0.89) but not the random forest model (ROCAUC = 0.78, 95% CI: 0.66–0.87) significantly outperformed the logistic regression model (ROCAUC = 0.73, 95% CI: 0.60–0.83, P = 0.01 and P = 0.24). The ANN model the logistic regression model demonstrated good calibration performance (P = 0.73 and P = 0.28), while the random forest model showed poor calibration (P < 0.01). The calibration curve of the ANN model was visually the closest to the perfectly calibrated line. Conclusion Machine learning models could accurately predict 2-year MFS after PTA and stenting for lower limb ASO, in which the ANN model had better discrimination and calibration. Machine learning-derived prediction tools might be clinically useful to automatically identify candidates for PTA and stenting.
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Affiliation(s)
- Tianyue Pan
- Department of Vascular Surgery, Institute of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Xiaolang Jiang
- Department of Vascular Surgery, Institute of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Hao Liu
- Department of Vascular Surgery, Institute of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Yifan Liu
- Department of Vascular Surgery, Institute of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Weiguo Fu
- Department of Vascular Surgery, Institute of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
- *Correspondence: Weiguo Fu
| | - Zhihui Dong
- Department of Vascular Surgery, Institute of Vascular Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
- Zhihui Dong
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10
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Pena G, Kuang B, Edwards S, Cowled P, Dawson J, Fitridge R. Factors Associated With Key Outcomes in Diabetes Related Foot Disease: A Prospective Observational Study. Eur J Vasc Endovasc Surg 2021; 62:233-240. [PMID: 34024706 DOI: 10.1016/j.ejvs.2021.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 03/29/2021] [Accepted: 04/05/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Diabetic foot disease is a serious and common complication of diabetes mellitus. The aim of this study was to assess limb and patient factors associated with key clinical outcomes in diabetic patients with foot ulcers. METHODS This was a prospective observational study of diabetic patients with foot wounds admitted to a major tertiary teaching hospital in South Australia or seen at associated multidisciplinary foot clinics between February 2017 and December 2018. Patient demographic and clinical data were collected, including limb status severity assessed by the WIfI system and grip strength. Participants were followed up for 12 months. The primary outcomes were major amputation, death, amputation free survival, and completion of healing of the index wound within one year. RESULTS A total of 153 participants were recruited and outcome data were obtained for 152. Forty-two participants underwent revascularisation during the research period. Eighteen participants (11.8%) suffered major amputation of the index limb and 16 (10.5%) died during follow up. Complete wound healing was achieved in 106 (70%) participants. There was a statistically significant association between WIfI stage and major amputation (subdistribution hazard ratio [SHR] 2.75), mortality (hazard ratio [HR] 2.60), amputation free survival (odds ratio [OR] 0.32), and wound healing (SHR 0.69). There was also a statistically significant association between time to healing and grip strength (SHR 0.50), and previous amputations (major or minor) (SHR 0.57). CONCLUSION This prospective study supports the ability of the WIfI classification system to predict one year key clinical outcomes in a diabetic population with foot ulcers. It also demonstrated that grip strength may be a useful predictor of wound healing.
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Affiliation(s)
- Guilherme Pena
- Department of Vascular and Endovascular Surgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Discipline of Surgery, The University of Adelaide, Adelaide, South Australia, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Woodville South, South Australia, Australia.
| | - Beatrice Kuang
- Department of Vascular and Endovascular Surgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Discipline of Surgery, The University of Adelaide, Adelaide, South Australia, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Woodville South, South Australia, Australia
| | - Suzanne Edwards
- Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - Prue Cowled
- Discipline of Surgery, The University of Adelaide, Adelaide, South Australia, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Woodville South, South Australia, Australia
| | - Joseph Dawson
- Department of Vascular and Endovascular Surgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Discipline of Surgery, The University of Adelaide, Adelaide, South Australia, Australia
| | - Robert Fitridge
- Department of Vascular and Endovascular Surgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Discipline of Surgery, The University of Adelaide, Adelaide, South Australia, Australia; Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Woodville South, South Australia, Australia
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11
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Kobayashi T, Hamamoto M, Okazaki T, Hasegawa M, Takahashi S. Long Term Outcomes of Endovascular Therapy for Failing Distal Bypass Vein Grafts. Eur J Vasc Endovasc Surg 2020; 61:121-127. [PMID: 33060028 DOI: 10.1016/j.ejvs.2020.09.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/29/2020] [Accepted: 09/22/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Although distal bypass using vein has been established with acceptable outcomes for chronic limb threatening ischaemia (CLTI), the major issue affecting long term outcomes is vein graft disease. This study aimed to analyse the peri-procedural results and long term outcomes of endovascular therapy (EVT) for failing vein grafts after distal bypass. METHODS A retrospective analysis of 113 failing vein grafts (94 patients, 113 limbs) after distal bypass between 2009 and 2019 at the study hospital. RESULTS The mean age was 74 ± 9 years and 72% of the patients were men. Of the 113 grafts, 54 grafts (48%) were detected in asymptomatic patients, 41 grafts (36%) in patients with recurrent ulcer or gangrene, and 18 grafts (16%) in patients with rest pain. The failing grafts were treated by low pressure long inflation balloon angioplasty with a mean balloon size of 3.0 ± 0.8 mm. The mean procedural time was 60 ± 29 min and procedural success was 98% (111 grafts). During the mean follow up period of 34 months, EVT was performed a median frequency of two times (range 1-11 times). The primary and assisted primary patency of the EVT revised grafts were 41% and 80% at one year, 34% and 68% at three years, 31% and 58% at five years, respectively. Of 41 limbs with recurrent ulcer or gangrene, the wound healed in 34 limbs (85%). The complete healing rate was 71% at three months and 84% at 12 months. Eight patients required major amputation, and the freedom from major amputation rate was 96% at one year and 80% at five years. CONCLUSION Long term outcomes including patency, wound healing rate, and amputation free survival after EVT for failing vein grafts were acceptable. EVT could be a viable alternative to surgical revascularisation in patients with a failing distal bypass graft for CLTI.
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Affiliation(s)
- Taira Kobayashi
- Department of Cardiovascular Surgery, JA Hiroshima General Hospital, Hiroshima, Japan.
| | - Masaki Hamamoto
- Department of Cardiovascular Surgery, JA Hiroshima General Hospital, Hiroshima, Japan
| | - Takanobu Okazaki
- Department of Cardiovascular Surgery, JA Hiroshima General Hospital, Hiroshima, Japan
| | - Misa Hasegawa
- Department of Reconstructive and Plastic Surgery, JA Hiroshima General Hospital, Hiroshima, Japan
| | - Shinya Takahashi
- Department of Cardiovascular Surgery, Hiroshima University, Hiroshima, Japan
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12
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Conte MS, Mills JL, Bradbury AW, White JV. Implementing global chronic limb-threatening ischemia guidelines in clinical practice: Utility of the Society for Vascular Surgery Threatened Limb Classification System (WIfI). J Vasc Surg 2020; 72:1451-1452. [PMID: 32972589 DOI: 10.1016/j.jvs.2020.06.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 06/04/2020] [Indexed: 11/15/2022]
Affiliation(s)
- Michael S Conte
- Division of Vascular and Endovascular Surgery, University of California San Francisco, San Francisco, Calif.
| | - Joseph L Mills
- Division of Vascular Surgery and Endovascular Therapy, Baylor College of Medicine, Houston, Tex
| | - Andrew W Bradbury
- Department of Vascular Surgery, University of Birmingham, Birmingham, UK
| | - John V White
- Department of Surgery, Advocate Lutheran General Hospital, Niles, Ill
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13
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Efficacy of nonviral gene transfer of human hepatocyte growth factor (HGF) against ischemic-reperfusion nerve injury in rats. PLoS One 2020; 15:e0237156. [PMID: 32780756 PMCID: PMC7418984 DOI: 10.1371/journal.pone.0237156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/21/2020] [Indexed: 01/20/2023] Open
Abstract
Ischemic neuropathy is common in subjects with critical limb ischemia, frequently causing chronic neuropathic pain. However, neuropathic pain caused by ischemia is hard to control despite the restoration of an adequate blood flow. Here, we used a rat model of ischemic-reperfusion nerve injury (IRI) to investigate possible effects of hepatocyte growth factor (HGF) against ischemic neuropathy. Hemagglutinating virus of Japan (HVJ) liposomes containing plasmids encoded with HGF was delivered into the peripheral nervous system by retrograde axonal transport following its repeated injections into the tibialis anterior muscle in the right hindlimb. First HGF gene transfer was done immediately after IRI, and repeated at 1, 2 and 3 weeks later. Rats with IRI exhibited pronounced mechanical allodynia and thermal hyperalgesia, decreased blood flow and skin temperature, and lowered thresholds of plantar stimuli in the hind paw. These were all significantly improved by HGF gene transfer, as also were sciatic nerve conduction velocity and muscle action potential amplitudes. Histologically, HGF gene transfer resulted in a significant increase of endoneurial microvessels in sciatic and tibial nerves and promoted nerve regeneration which were confirmed by morphometric analysis. Neovascularization was observed in the contralateral side of peripheral nerves as well. In addition, IRI elevated mRNA levels of P2X3 and P2Y1 receptors, and transient receptor potential vanilloid receptor subtype 1 (TRPV1) in sciatic nerves, dorsal root ganglia and spinal cord, and these elevated levels were inhibited by HGF gene transfer. In conclusion, HGF gene transfer is a potent candidate for treatment of acute ischemic neuropathy caused by reperfusion injury, because of robust angiogenesis and enhanced nerve regeneration.
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14
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Alexandrescu VA, Houbiers A. Commentary: Limb-Based Patency for Chronic Limb-Threatening Ischemia Treatment: Do We Face a Threshold for Redefining Current Revascularization Practice? J Endovasc Ther 2020; 27:595-598. [PMID: 32495681 DOI: 10.1177/1526602820926953] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Vlad-Adrian Alexandrescu
- Cardio-Vascular Department, CHU Sart-Tilman University Hospital Liège, Belgium.,Department of Vascular and General Surgery, Princess Paola Hospital, Vivalia, Marche-en-Famenne, Belgium
| | - Arthur Houbiers
- Department of Vascular and General Surgery, Princess Paola Hospital, Vivalia, Marche-en-Famenne, Belgium
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15
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Cerqueira LDO, Duarte EG, Barros ALDS, Cerqueira JR, de Araújo WJB. WIfI classification: the Society for Vascular Surgery lower extremity threatened limb classification system, a literature review. J Vasc Bras 2020; 19:e20190070. [PMID: 34178056 PMCID: PMC8202158 DOI: 10.1590/1677-5449.190070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The Society for Vascular Surgery has proposed a new classification system for the threatened lower limb, based on the three main factors that have an impact on limb amputation risk: Wound (W), Ischemia (I) and foot Infection ("fI") - the WIfI classification. The system also covers diabetic patients, previously excluded from the concept of critical limb ischemia because of their complex clinical condition. The classification's purpose is to provide accurate and early risk stratification for patients with threatened lower limbs; assisting with clinical management, enabling comparison of alternative therapies; and predicting risk of amputation at 1 year and the need for limb revascularization. The objective of this study is to collect together the main points about the WIfI classification that have been discussed in the scientific literature. Most of the studies conducted for validation of this classification system prove its association with factors related to limb salvage, such as amputation rates, amputation-free survival, prediction of reintervention, amputation, and stenosis (RAS) events, and wound healing.
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Affiliation(s)
| | - Eliud Garcia Duarte
- Universidade Vila Velha - UVV, Cirurgia Vascular, Vila Velha, ES, Brasil.,Centro de Atuação Precoce em Úlceras Vasculares e Complicações do Pé Diabético - PROPÉ, Departamento de Cirurgia Vascular, Vila Velha, ES, Brasil.,Hospital Estadual de Urgência e Emergência do Espírito Santo - HEUE, Departamento de Cirurgia Vascular, Vila Velha, ES, Brasil.,Hospital Santa Mônica de Vila Velha, Serviço de Cirurgia Vascular e Endovascular, Vila Velha, ES, Brasil
| | - André Luis de Souza Barros
- Universidade Vila Velha - UVV, Cirurgia Vascular, Vila Velha, ES, Brasil.,Centro de Atuação Precoce em Úlceras Vasculares e Complicações do Pé Diabético - PROPÉ, Departamento de Cirurgia Vascular, Vila Velha, ES, Brasil
| | - José Roberto Cerqueira
- Hospital Santa Mônica de Vila Velha, Serviço de Cirurgia Vascular e Endovascular, Vila Velha, ES, Brasil
| | - Walter Júnior Boim de Araújo
- Universidade Federal do Paraná - UFPR, Hospital de Clínicas, Serviço de Angiorradiologia e Cirurgia Endovascular, Curitiba, PR, Brasil.,Hospital Angelina Caron, Departamento de Residência Médica em Cirurgia Vascular e Endovascular, Curitiba, PR, Brasil
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16
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Fereydooni A, Gorecka J, Dardik A. Using the epidemiology of critical limb ischemia to estimate the number of patients amenable to endovascular therapy. Vasc Med 2019; 25:78-87. [PMID: 31621531 DOI: 10.1177/1358863x19878271] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Critical limb ischemia represents the advanced stage of peripheral artery disease, a health problem with increasing prevalence. Critical limb ischemia is associated with significant mortality, limb loss, pain, and diminished health-related quality of life. Public awareness and early diagnosis are necessary for an effective treatment with early risk factor modification, smoking cessation, and exercise therapy. Herein, we present an overview of the epidemiology as well as the clinical stages of the disease, and estimate that there are 6.5 million patients with critical limb ischemia in the US, Europe, and Japan based on global population-based studies. At least 75% of these patients, accounting for approximately 4.8 million patients, are amenable to endovascular therapy.
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Affiliation(s)
- Arash Fereydooni
- Department of Surgery, Division of Vascular and Endovascular Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - Jolanta Gorecka
- Department of Surgery, Division of Vascular and Endovascular Surgery, Yale University School of Medicine, New Haven, CT, USA
| | - Alan Dardik
- Department of Surgery, Division of Vascular and Endovascular Surgery, Yale University School of Medicine, New Haven, CT, USA
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17
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van Reijen NS, Ponchant K, Ubbink DT, Koelemay MJ. Editor's Choice – The Prognostic Value of the WIfI Classification in Patients with Chronic Limb Threatening Ischaemia: A Systematic Review and Meta-Analysis. Eur J Vasc Endovasc Surg 2019; 58:362-371. [DOI: 10.1016/j.ejvs.2019.03.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 03/26/2019] [Accepted: 03/29/2019] [Indexed: 12/26/2022]
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18
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Conte MS, Bradbury AW, Kolh P, White JV, Dick F, Fitridge R, Mills JL, Ricco JB, Suresh KR, Murad MH, Aboyans V, Aksoy M, Alexandrescu VA, Armstrong D, Azuma N, Belch J, Bergoeing M, Bjorck M, Chakfé N, Cheng S, Dawson J, Debus ES, Dueck A, Duval S, Eckstein HH, Ferraresi R, Gambhir R, Gargiulo M, Geraghty P, Goode S, Gray B, Guo W, Gupta PC, Hinchliffe R, Jetty P, Komori K, Lavery L, Liang W, Lookstein R, Menard M, Misra S, Miyata T, Moneta G, Munoa Prado JA, Munoz A, Paolini JE, Patel M, Pomposelli F, Powell R, Robless P, Rogers L, Schanzer A, Schneider P, Taylor S, De Ceniga MV, Veller M, Vermassen F, Wang J, Wang S. Global Vascular Guidelines on the Management of Chronic Limb-Threatening Ischemia. Eur J Vasc Endovasc Surg 2019; 58:S1-S109.e33. [PMID: 31182334 PMCID: PMC8369495 DOI: 10.1016/j.ejvs.2019.05.006] [Citation(s) in RCA: 678] [Impact Index Per Article: 135.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
GUIDELINE SUMMARY Chronic limb-threatening ischemia (CLTI) is associated with mortality, amputation, and impaired quality of life. These Global Vascular Guidelines (GVG) are focused on definition, evaluation, and management of CLTI with the goals of improving evidence-based care and highlighting critical research needs. The term CLTI is preferred over critical limb ischemia, as the latter implies threshold values of impaired perfusion rather than a continuum. CLTI is a clinical syndrome defined by the presence of peripheral artery disease (PAD) in combination with rest pain, gangrene, or a lower limb ulceration >2 weeks duration. Venous, traumatic, embolic, and nonatherosclerotic etiologies are excluded. All patients with suspected CLTI should be referred urgently to a vascular specialist. Accurately staging the severity of limb threat is fundamental, and the Society for Vascular Surgery Threatened Limb Classification system, based on grading of Wounds, Ischemia, and foot Infection (WIfI) is endorsed. Objective hemodynamic testing, including toe pressures as the preferred measure, is required to assess CLTI. Evidence-based revascularization (EBR) hinges on three independent axes: Patient risk, Limb severity, and ANatomic complexity (PLAN). Average-risk and high-risk patients are defined by estimated procedural and 2-year all-cause mortality. The GVG proposes a new Global Anatomic Staging System (GLASS), which involves defining a preferred target artery path (TAP) and then estimating limb-based patency (LBP), resulting in three stages of complexity for intervention. The optimal revascularization strategy is also influenced by the availability of autogenous vein for open bypass surgery. Recommendations for EBR are based on best available data, pending level 1 evidence from ongoing trials. Vein bypass may be preferred for average-risk patients with advanced limb threat and high complexity disease, while those with less complex anatomy, intermediate severity limb threat, or high patient risk may be favored for endovascular intervention. All patients with CLTI should be afforded best medical therapy including the use of antithrombotic, lipid-lowering, antihypertensive, and glycemic control agents, as well as counseling on smoking cessation, diet, exercise, and preventive foot care. Following EBR, long-term limb surveillance is advised. The effectiveness of nonrevascularization therapies (eg, spinal stimulation, pneumatic compression, prostanoids, and hyperbaric oxygen) has not been established. Regenerative medicine approaches (eg, cell, gene therapies) for CLTI should be restricted to rigorously conducted randomizsed clinical trials. The GVG promotes standardization of study designs and end points for clinical trials in CLTI. The importance of multidisciplinary teams and centers of excellence for amputation prevention is stressed as a key health system initiative.
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Affiliation(s)
- Michael S Conte
- Division of Vascular and Endovascular Surgery, University of California, San Francisco, CA, USA.
| | - Andrew W Bradbury
- Department of Vascular Surgery, University of Birmingham, Birmingham, United Kingdom
| | - Philippe Kolh
- Department of Biomedical and Preclinical Sciences, University Hospital of Liège, Wallonia, Belgium
| | - John V White
- Department of Surgery, Advocate Lutheran General Hospital, Niles, IL, USA
| | - Florian Dick
- Department of Vascular Surgery, Kantonsspital St. Gallen, St. Gallen, and University of Berne, Berne, Switzerland
| | - Robert Fitridge
- Department of Vascular and Endovascular Surgery, The University of Adelaide Medical School, Adelaide, South Australia, Australia
| | - Joseph L Mills
- Division of Vascular Surgery and Endovascular Therapy, Baylor College of Medicine, Houston, TX, USA
| | - Jean-Baptiste Ricco
- Department of Clinical Research, University Hospitalof Poitiers, Poitiers, France
| | | | - M Hassan Murad
- Mayo Clinic Evidence-Based Practice Center, Rochester, MN, USA
| | - Victor Aboyans
- Department of Cardiology, Dupuytren, University Hospital, France
| | - Murat Aksoy
- Department of Vascular Surgery American, Hospital, Turkey
| | | | | | | | - Jill Belch
- Ninewells Hospital University of Dundee, UK
| | - Michel Bergoeing
- Escuela de Medicina Pontificia Universidad, Catolica de Chile, Chile
| | - Martin Bjorck
- Department of Surgical Sciences, Vascular Surgery, Uppsala University, Sweden
| | | | | | - Joseph Dawson
- Royal Adelaide Hospital & University of Adelaide, Australia
| | - Eike S Debus
- University Heart Center Hamburg, University Hospital Hamburg-Eppendorf, Germany
| | - Andrew Dueck
- Schulich Heart Centre, Sunnybrook Health, Sciences Centre, University of Toronto, Canada
| | - Susan Duval
- Cardiovascular Division, University of, Minnesota Medical School, USA
| | | | - Roberto Ferraresi
- Interventional Cardiovascular Unit, Cardiology Department, Istituto Clinico, Città Studi, Milan, Italy
| | | | - Mauro Gargiulo
- Diagnostica e Sperimentale, University of Bologna, Italy
| | | | | | | | - Wei Guo
- 301 General Hospital of PLA, Beijing, China
| | | | | | - Prasad Jetty
- Division of Vascular and Endovascular Surgery, The Ottawa Hospital and the University of Ottawa, Ottawa, Canada
| | | | | | - Wei Liang
- Renji Hospital, School of Medicine, Shanghai Jiaotong University, China
| | - Robert Lookstein
- Division of Vascular and Interventional Radiology, Icahn School of Medicine at Mount Sinai
| | | | | | | | | | | | | | - Juan E Paolini
- Sanatorio Dr Julio Mendez, University of Buenos Aires, Argentina
| | - Manesh Patel
- Division of Cardiology, Duke University Health System, USA
| | | | | | | | - Lee Rogers
- Amputation Prevention Centers of America, USA
| | | | - Peter Schneider
- Kaiser Foundation Hospital Honolulu and Hawaii Permanente Medical Group, USA
| | - Spence Taylor
- Greenville Health Center/USC School of Medicine Greenville, USA
| | | | - Martin Veller
- University of the Witwatersrand, Johannesburg, South Africa
| | | | - Jinsong Wang
- The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shenming Wang
- The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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19
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Lower Extremity Amputations in At-Risk Patients: A Focus on Tissue Viability and Function in the Compromised Limb. Clin Podiatr Med Surg 2019; 36:483-498. [PMID: 31079612 DOI: 10.1016/j.cpm.2019.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Amputations distal to the ankle joint are commonly performed in efforts to preserve a limb. Thorough examination of lower extremity biomechanics, patient functional status, and patient goals must be used to help prevent reulceration and further amputation. Once infection is resolved in the acute setting, musculotendon balancing should be considered at the time of amputation closure to maintain functionality of the limb. Patients should be closely followed postoperatively and monitored for biomechanical deformity that needs to be addressed. Careful attention to detail and adherence to surgical principles can help keep patients active and prevent further amputation.
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20
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Conte MS, Bradbury AW, Kolh P, White JV, Dick F, Fitridge R, Mills JL, Ricco JB, Suresh KR, Murad MH. Global vascular guidelines on the management of chronic limb-threatening ischemia. J Vasc Surg 2019; 69:3S-125S.e40. [PMID: 31159978 PMCID: PMC8365864 DOI: 10.1016/j.jvs.2019.02.016] [Citation(s) in RCA: 654] [Impact Index Per Article: 130.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Chronic limb-threatening ischemia (CLTI) is associated with mortality, amputation, and impaired quality of life. These Global Vascular Guidelines (GVG) are focused on definition, evaluation, and management of CLTI with the goals of improving evidence-based care and highlighting critical research needs. The term CLTI is preferred over critical limb ischemia, as the latter implies threshold values of impaired perfusion rather than a continuum. CLTI is a clinical syndrome defined by the presence of peripheral artery disease (PAD) in combination with rest pain, gangrene, or a lower limb ulceration >2 weeks duration. Venous, traumatic, embolic, and nonatherosclerotic etiologies are excluded. All patients with suspected CLTI should be referred urgently to a vascular specialist. Accurately staging the severity of limb threat is fundamental, and the Society for Vascular Surgery Threatened Limb Classification system, based on grading of Wounds, Ischemia, and foot Infection (WIfI) is endorsed. Objective hemodynamic testing, including toe pressures as the preferred measure, is required to assess CLTI. Evidence-based revascularization (EBR) hinges on three independent axes: Patient risk, Limb severity, and ANatomic complexity (PLAN). Average-risk and high-risk patients are defined by estimated procedural and 2-year all-cause mortality. The GVG proposes a new Global Anatomic Staging System (GLASS), which involves defining a preferred target artery path (TAP) and then estimating limb-based patency (LBP), resulting in three stages of complexity for intervention. The optimal revascularization strategy is also influenced by the availability of autogenous vein for open bypass surgery. Recommendations for EBR are based on best available data, pending level 1 evidence from ongoing trials. Vein bypass may be preferred for average-risk patients with advanced limb threat and high complexity disease, while those with less complex anatomy, intermediate severity limb threat, or high patient risk may be favored for endovascular intervention. All patients with CLTI should be afforded best medical therapy including the use of antithrombotic, lipid-lowering, antihypertensive, and glycemic control agents, as well as counseling on smoking cessation, diet, exercise, and preventive foot care. Following EBR, long-term limb surveillance is advised. The effectiveness of nonrevascularization therapies (eg, spinal stimulation, pneumatic compression, prostanoids, and hyperbaric oxygen) has not been established. Regenerative medicine approaches (eg, cell, gene therapies) for CLTI should be restricted to rigorously conducted randomizsed clinical trials. The GVG promotes standardization of study designs and end points for clinical trials in CLTI. The importance of multidisciplinary teams and centers of excellence for amputation prevention is stressed as a key health system initiative.
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Affiliation(s)
- Michael S Conte
- Division of Vascular and Endovascular Surgery, University of California, San Francisco, Calif.
| | - Andrew W Bradbury
- Department of Vascular Surgery, University of Birmingham, Birmingham, United Kingdom
| | - Philippe Kolh
- Department of Biomedical and Preclinical Sciences, University Hospital of Liège, Wallonia, Belgium
| | - John V White
- Department of Surgery, Advocate Lutheran General Hospital, Niles, Ill
| | - Florian Dick
- Department of Vascular Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Robert Fitridge
- Department of Vascular and Endovascular Surgery, The University of Adelaide Medical School, Adelaide, South Australia
| | - Joseph L Mills
- Division of Vascular Surgery and Endovascular Therapy, Baylor College of Medicine, Houston, Tex
| | - Jean-Baptiste Ricco
- Department of Clinical Research, University Hospitalof Poitiers, Poitiers, France
| | | | - M Hassan Murad
- Mayo Clinic Evidence-Based Practice Center, Rochester, Minn
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21
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Kimura T, Watanabe Y, Tokuoka S, Nagashima F, Ebisudani S, Inagawa K. Utility of skin perfusion pressure values with the Society for Vascular Surgery Wound, Ischemia, and foot Infection classification system. J Vasc Surg 2019; 70:1308-1317. [PMID: 31113720 DOI: 10.1016/j.jvs.2019.01.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 01/01/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The addition of skin perfusion pressure (SPP) might enhance the predictive value of the Society for Vascular Surgery Wound, Ischemia, and foot Infection (WIfI) classification system. The purpose of the present study was to evaluate the SPP for each WIfI classification stage among patients with foot wounds by cross-referencing the results of prospectively monitored limb outcomes and to derive the SPP criteria that could be combined with other measurements to grade ischemia for the WIfI classification. METHODS From July 2015 to June 2017, patients with foot wounds that met the WIfI classification criteria were prospectively enrolled. We assessed the limbs using the WIfI ischemia grade without measuring the transcutaneous oxygen pressure but measured the SPP. After monitoring for 1 year, the predictability of the WIfI stages was analyzed according to whether the limbs had not healed (unchanged or worsened wounds, minor or major amputation, all-cause death) or had healed (improved or healed wounds) by comparing stages 1 and 2 with stages 3 and 4. We also statistically analyzed the SPP values that could be the boundary values between each ischemia grade and reevaluated the predictability of the WIfI stages with the boundary SPP values. RESULTS We enrolled a total of 91 limbs for 76 patients (mean age, 70.5 ± 12.0 years). The mean SPP values stratified by ischemia grade 0 to 3 were 52.1, 41.1, 27.1, and 18.8 mm Hg, respectively (an SPP of <30 mm Hg indicates severe ischemia). After monitoring for 1 year, 19 of 48 limbs in stage 1 and 2 and 35 of 43 in stage 3 and 4 were in the nonhealed group and 29 limbs in stage 1 and 2 and 8 limbs in stage 3 and 4 were in the healed group. The SPP boundary values between each ischemia (I) grade were calculated as 45 mm Hg for I-0/I-1, 35 for I-1/I-2, and 25 for I-2/I-3. When jointly using the boundary SPP values, the ischemia grade changed for 23 limbs, altering the distribution of the WIfI stages and limb outcomes: 11 of 38 limbs in stage 1 and 2 and 43 of 53 in stage 3 and 4 were transferred to the nonhealed group. The sensitivity, efficiency, and negative predictive value of WIfI staging improved when staging with SPP: from 65% to 80%, 70% to 77%, and 60% to 71%, respectively. CONCLUSIONS The SPP boundary values that could be used with ischemia grade in the WIfI classification were identified as 45, 35, and 25 mm Hg. The addition of SPP could improve the accuracy of the evaluation.
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Affiliation(s)
- Tomomi Kimura
- Department of Plastic and Reconstructive Surgery, Kawasaki Medical School, Kurashiki, Japan.
| | - Yoshiko Watanabe
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Japan
| | - Shintaro Tokuoka
- Department of Plastic Surgery, Kawasaki Medical School General Medical Center, Okayama, Japan
| | | | - Shogo Ebisudani
- Department of Plastic and Reconstructive Surgery, Kawasaki Medical School, Kurashiki, Japan
| | - Kiichi Inagawa
- Department of Plastic and Reconstructive Surgery, Kawasaki Medical School, Kurashiki, Japan
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22
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Mayor J, Chung J, Zhang Q, Montero-Baker M, Schanzer A, Conte MS, Mills JL. Using the Society for Vascular Surgery Wound, Ischemia, and foot Infection classification to identify patients most likely to benefit from revascularization. J Vasc Surg 2019; 70:776-785.e1. [PMID: 30922742 DOI: 10.1016/j.jvs.2018.11.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/11/2018] [Indexed: 11/16/2022]
Abstract
BACKGROUND The Society of Vascular Surgery Wound Ischemia foot Infection (WIfI) classification system for chronic limb-threatening ischemia was intended to predict 1-year major lower extremity amputation (LEA) risk and to identify which patients benefit most from revascularization. We aimed to identify which WIfI presentations benefited most from revascularization to explore whether a cluster analysis could identify a more data-driven WIfI score, and to quantify which component of the WIfI score was most strongly associated with 1-year LEA after revascularization. METHODS Composite multi-institutional nested cohort data from centers who previously validated WIfI were reviewed retrospectively. We collected each patient's WIfI component grades and whether LEA was performed. To examine the benefit of revascularization, the predicted LEA rates were subtracted from observed LEA rates. We used k-means cluster analysis to model predicted vs observed LEA rates after revascularization. Multivariable linear regression analysis was performed to quantify which WIfI score component(s) best predicted LEA. RESULTS Data from 10 centers, accumulated between 2005 and 2015 were collated (2878 limbs at risk; 314 LEAs performed). The subset of patients who underwent revascularization comprised the study base (1654 limbs; 169 LEAs). Of 64 potential WIfI grade combinations, 15 were never reported and were excluded from the analysis. By original WIfI stages, the observed LEA rate after revascularization was: stage 1, 10.8% (14/130); stage 2, 4.9% (5/103); stage 3, 5.1% (25/487); and stage 4, 13.4% (125/934). Based on the difference between predicted and observed LEA risk for those who underwent revascularization, the WIfI scores were placed into quartiles from greatest to no benefit of revascularization. Cluster analysis identified four clusters with the following 1-year LEA rates: cluster 1, 4.4% (46/1038); cluster 2, 14.8% (66/447); cluster 3, 28.1% (36/128); and cluster 4, 51.2% (21/41). The between sum of squares/total sum of squares was 93.9%. Multiple linear regression revealed the wound grade most strongly predicted LEA (F-value, 17.25; P < .001). Ischemia (F-value, 6.51; P = .001) and infection (F-value, 5.7; P = .003) were similarly associated with LEA risk. Interaction terms between each component of the WIfI score were not statistically significant. CONCLUSIONS WIfI can identify which patients with chronic limb-threatening ischemia are most likely to benefit from revascularization and may provide improved prognostication, risk stratification, and equitable outcome assessments. After revascularization, wound severity is most strongly associated with LEA risk. Ischemic and infectious grades confer additive, but not synergistic, risk. Future cluster analyses comparing specific WIfI presentations treated with and without revascularization will be required to further refine WIfI.
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Affiliation(s)
- Jessica Mayor
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Tex
| | - Jayer Chung
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Tex
| | - Qianzi Zhang
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Tex
| | - Miguel Montero-Baker
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Tex
| | - Andres Schanzer
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of Massachusetts Medical School, Worcester, Mass
| | - Michael S Conte
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, Calif
| | - Joseph L Mills
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Tex.
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Tunable sequential drug delivery system based on chitosan/hyaluronic acid hydrogels and PLGA microspheres for management of non-healing infected wounds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 89:213-222. [PMID: 29752091 DOI: 10.1016/j.msec.2018.04.009] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/15/2018] [Accepted: 04/09/2018] [Indexed: 02/06/2023]
Abstract
Treatment of non-healing infected wounds is an arduous task in clinical practice. Early antibacterial strategy and subsequent promotion of granulation tissue growth facilitate to cure the wounds. For this purpose, we fabricated a sequential drug delivery system by incorporation of an injectable hydrogel with porous PLGA microspheres. Vancomycin was linked to the injectable hydrogel via the reversible Schiff's base reaction, and VEGF were encapsulated into PLGA microspheres. After adding vancomycin, the strength and elasticity of the hydrogel were improved, and the gelation time was shortened. The results also demonstrated that the releasing profile of vancomycin was pH-dependent and the VEGF's profile was adjustable by changing the pore sizes of PLGA microspheres. The duration of VEGF release was longer than vancomycin. This hybrid system was valid to inhibit bacteria growth and accelerate vein endothelial cell proliferation in vitro. In rat models, it was effective to manage non-healing infected wounds by reducing inflammation and promoting angiogenesis. In conclusion, this sequential delivery system is promoting to manage non-healing infected wounds, and also provides a new thought to realize the staged drug release.
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