Antegrade Superficial Femoral Artery Access for Lower Extremity Arterial Disease Is Safe and Effective in the Outpatient Setting.

BACKGROUND: Antegrade superficial femoral artery (SFA) access for peripheral artery disease reduces the time, radiation, and contrast required with contralateral common femoral access (CFA). Yet, this technique remains underutilized in the treatment of SFA, popliteal and tibial disease, and there remains limited data on the safety and effectiveness of antegrade SFA access in the outpatient setting. METHODS: A retrospective review of lower extremity peripheral arterial interventions in our office-based endovascular suite was conducted from 2013 to 2018. Interventions necessitating CFA access such as iliac, common femoral, or deep femoral artery revascularization were excluded (n = 206). In addition, interventions potentially requiring large sheaths not amenable to SFA access (e.g., popliteal aneurysm) were excluded. Relevant demographic and treatment variables including postoperative complications were abstracted. RESULTS: We identified 718 patients, who underwent revascularization of the SFA, popliteal and tibial arteries. Antegrade SFA access was chosen in 448 patients (62.4%) with the remaining 270 patients having retrograde CFA access. Antegrade SFA access was achieved primarily with a 4-French sheath, while a majority of retrograde CFA interventions utilized a 6-French sheath for access (87.7% vs 69.5%, P < 0.001). Significantly less fluoroscopy (9.5 vs 16.4 min, P < 0.001) and contrast (25.4 vs 38.5 mL, P < 0.001) were used during SFA access compared with retrograde access. Technical success was achieved in 93.2% with antegrade SFA vs 94.8% retrograde CFA access (P = 0.42). The overall rate of complications was low for both cohorts (2.7% vs 3.7%, P = 0.78) and there were no statistical differences in access site complications (1.1% vs 1.5%, P = 0.94), hematoma (0.7% vs 1.1%, P = 0.84), and pseudoaneurysm (0.4% vs 0%, P = 0.98) between techniques. CONCLUSIONS: Percutaneous antegrade SFA access can be performed safely in the outpatient setting and remains an effective alternative to retrograde CFA access with significantly less utilization of fluoroscopy and contrast.

A Trainee Perspective to Issues Needing Redressal in Current Vascular Surgery Training Programs: Survey Results from 2004 to 2015.

BACKGROUND: Vascular surgery training and practice have been constantly evolving in the last 2 decades. The goal of this study is to report the changing trends in perspectives of vascular surgery trainees on current training program and issues that need redressal in vascular training and practice. METHODS: Vascular surgery trainees in the United States, who attended the Society of Clinical Vascular Surgery meeting from 2004 to 2015, were surveyed annually with an anonymous questionnaire during the meet. Questions pertaining to their endovascular and open surgical learning experience, independent performance of procedures, challenges of job search, starting an independent practice, and their perception of issues in vascular surgery training were analyzed. Responses from the first half of the decade (2004-2009) were compared with the second half (2010-2015) to identify evolving trends in trainee perception. RESULTS: Among the 908 vascular surgery trainees who attended the annual meeting from 2004 to 2015, 670 (74%) trainees responded to the questionnaire. The mean age of vascular trainees was 32.5 years. In the latter half of the decade, there was a 2-fold increase in female trainees, from 12.3% to 23.6% (P = 0.002), and the integrated program trainees also increased from 0% to 12% of respondents (P = 0.0023). Trainee satisfaction with endovascular training improved from 78% to 90% (P = 0.0001), and satisfaction with open surgical experience was unchanged at 83% over the 10-year period (P = 0.16). The perception of vascular laboratory experience improved with only 35% vs. 27% (P = 0.016) of respondents dissatisfied, despite only a third of respondents actually performing the noninvasive tests in both the former and the latter half of the decade, respectively. CONCLUSIONS: Although the quality of vascular cases during training has improved, vascular trainees desire shorter training paradigms, and vascular laboratory education is still viewed as deficient. These findings can be used by training programs to re-examine their curricula and implement changes to improve the quality of training the next generation of vascular surgeons.

Clinical correlation of the area of inferior vena cava, iliac and femoral veins for stent use.

Objective The purpose of the study is to evaluate normal anatomical areas of infrarenal inferior vena cava, common iliac, external iliac and common femoral veins by intravascular ultrasound with the goal of assisting the development of venous-specific stents in the treatment of iliac vein stenosis. Method From February 2012 to December 2013, 656 office-based venograms were performed in our facility. Among them, 576 were stented and 80 were not. The measurements of veins were done intraoperatively using an intravascular ultrasound catheter to record areas of the inferior vena cava, proximal, middle and distal segments of common iliac vein, external iliac vein and common femoral vein. The data were compared between non-diseased segments of patients who were stented and those not stented. The stented diseased segments were excluded. Results The mean patient age was 67.33 years (range 22-96, SD ±13.99). Our data included 218 males, 438 females and 324 right lower extremities and 332 left lower extremities. The presenting symptoms of these patients based on CEAP were C1(0), C2 (185), C3(233), C4(107), C5(89) and C6(42). No correlation was found between area of veins and age, gender, laterality and CEAP score (P > .13). Comparison of the areas of non-diseased iliac vein segments between patients not stented and patients who underwent stenting showed a significant difference, with larger areas in non-stented patients in the distal common iliac vein (P = .039) and inferior vena cava (P = .012). Younger age (P = .03) and male gender (P < .0001) were associated with increased area of iliac vein segments. Conclusion Utilizing the intravascular ultrasound-guided technique, we were able to define normal anatomical areas of non-diseased inferior vena cava, iliac and femoral veins, which could be employed to guide the development of appropriate-sized stents and other tools needed for the treatment of venous insufficiency. There is specific variability in areas of normal vein segments with age and gender with/without stents.

Recent trends in publications of US vascular surgery program directors.

Objective In order to examine the academic productivity of US vascular surgery program directors, the number of vascular publications listed in PubMed from 2001 to 2015 for US vascular surgery program directors was reviewed. We suggest that this can be used as a benchmark for academic productivity. Methods The names of the program directors were taken from the Accreditation Council for Graduate Medical Education (ACGME) website at two time points: December 2009 (Independent Programs) and December 2015 (Independent + Integrated). This was used to query PubMed, which listed 5196 publications: 3284 from 2001 to 2009 and 1912 from 2010 to 2015. Results There were 104 program directors (2001-2009) and 114 program directors (2010-2015) with average number of publications in PubMed per program director as 3.68/year (SD ± 2.31) and 2.80/year (SD ± 2.73), respectively ( P = .01). From 2001 to 2009, 1215 (37%) and in 2010 to 2015, 860 (45%) of the publications were from Journal of vascular surgery. The top third produced 67% and 69% of publications in the two time-points. No statistical difference was ascertained regionally: northeast, southeast, midwest and west ( P = .46). The numbers of publications/year decreased by 17% compared to first 10 years. From 2001 to 2009, there were no programs with no publications which increased to five and three with no Journal of Vascular Surgery publications which increased to 21 in 2010-2015. The independent and integrated program directors published average of 2.85 (SD ± 2.69) and 3.47 (SD ± 3.1) total publications; 1.25 (SD ± 1.4) and 3.47 (SD ± 1.7) Journal of Vascular Surgery papers/year, respectively ( P = .28, P = .23). Changes in the study subject were noted by percentage of total publications: endovascular lower extremity arterial (4.7% to 8.9%), Thoracic Endovascular Aortic Repair (TEVAR) (4.5% to 9.9%), Arterio-Venous (AV) access (0.0% to 3.0%), basic science (14.7% to 6.8%), open thoracic (3.0% to 0.6%). Conclusion There seems to be a significant decline in the number of publications over the last 15 years. Yet, the subject of the publications has progressed from Open to TEVAR with an increase in endovascular publications. However, basic science publications reduced by half.

Percutaneous fenestrated endovascular aortic graft treatment of aortocaval fistula with aortic pseudoaneurysms secondary to penetrating trauma.

Aortocaval fistula (ACF) is a lethal complication of aortic aneurysmal disease. Traditional treatment of ACF involves open surgical approaches to fistula ligation and repair of the great vessels, with a high mortality secondary to bleeding and cardiac compromise. We present the case of a 28-year-old man with a chronic ACF with concomitant aortic pseudoaneurysms secondary to penetrating trauma treated with a fenestrated endograft.

Aberrant left vertebral artery transposition and concomitant carotid-subclavian bypass for treatment of acute intramural hematoma with thoracic endovascular aortic repair.

Aberrant left vertebral artery (LVA) origin off the aortic arch is an uncommon anatomic variant. Treatment of the thoracic aortic pathology that necessitates its coverage has not been described. We present a patient with an acute intramural hematoma with a dominant LVA originating from the aortic arch. A LVA-to-carotid artery transposition with shunt placement, carotid-to-subclavian bypass, and thoracic endovascular aortic repair were performed. The patient recovered uneventfully, without any evidence of stroke. This case study shows that aberrant left vertebral anatomy presents a unique and interesting challenge and that vertebral shunt techniques during revascularization can be performed without stroke.

Compression versus No Compression after Endovenous Ablation of the Great Saphenous Vein: A Randomized Controlled Trial.

BACKGROUND: The goal of this study is to determine if compression therapy after endovenous ablation (EVA) of the great saphenous vein (GSV) improves efficacy and patient-reported outcomes of pain, ecchymosis, and quality of life. METHODS: This is a prospective randomized controlled trial from 2009 to 2013 comparing the use of thigh-high 30-40 mm Hg compression therapy for 7 days versus no compression therapy following EVA of the GSV. Severity of venous disease was measured by clinical severity, etiology, anatomy, pathophysiology scale and the Venous Clinical Severity Score (VCSS). Quality of life assessments were carried out with a Chronic Venous Insufficiency Questionnaire (CIVIQ-2) at days 1, 7, 14, 30, and 90, and the Visual Analog Pain Scale daily for the first week. Bruising score was assessed at 1 week post procedure. Postablation venous duplex was also performed. RESULTS: Seventy patients and 85 limbs with EVA were randomized. EVA modalities included radiofrequency ablation (91%) and laser ablation (9%). Clinical severity, etiology, anatomy, pathophysiology class and VCSS scores were equivalent between the 2 groups. There was no significant difference in patient-reported outcomes of postprocedural pain scores at day 1 (mean 3.0 vs. 3.12, P = 0.948) and day 7 (mean 2.11 vs. 2.81, P = 0.147), CIVIQ-2 scores at 1 week (mean 36.9 vs. 35.1, P = 0.594) and 90 days (mean 29.1 vs. 22.5, P = 0.367), and bruising score (mean 1.2 vs. 1.4, P = 0.561) in the compression versus no compression groups, respectively. Additionally, there was a 100% rate of GSV closure in both groups and no endothermal heat-induced thrombosis as assessed by postablation duplex. CONCLUSIONS: Compression therapy does not significantly affect both patient-reported and clinical outcomes after GSV ablation in patients with nonulcerated venous insufficiency. It may be an unnecessary adjunct following GSV ablation.

Pneumatic Compression Improves Quality of Life in Patients with Lower-Extremity Lymphedema.

BACKGROUND: Lymphedema is an incurable and disfiguring disease secondary to excessive fluid and protein in the interstitium as a result of lymphatic obstruction. Pneumatic compression (PC) offers a novel modality for treatment of lymphatic obstruction through targeting lymphatic beds and mimicking a functional drainage system. The objective of this study is to demonstrate improved quality of life in patients with lower-extremity lymphedema. METHODS: Consecutive patients presenting to a single institution for treatment of lymphedema were all treated with PC for at least 3 months. All patients underwent a pre- and post-PC assessment of episodes of cellulitis, number of ulcers, and venous insufficiency. Post-PC symptom questionnaires were administered. Symptom improvement was the primary outcome for analysis. RESULTS: A total of 100 patients met inclusion criteria. At presentation, 70% were female with a mean age of 57.5 years. Secondary lymphedema was present in 78%. Mean length of PC use was 12.7 months with a mean of 5.3 treatments per week. Ankle and calf limb girth decreased after PC use, (28.3 vs. 27.5 cm, P = 0.01) and (44.7 vs. 43.8 cm, P = 0.018), respectively. The number of episodes of cellulitis and ulcers pre- and post-PC decreased from mean of 0.26-0.05 episodes (P = 0.002) and 0.12-0.02 ulcers (P = 0.007), respectively. Fourteen percent had concomitant superficial venous insufficiency, all of whom underwent venous ablation. Overall 100% of patients reported symptomatic improvement post-PC with 54% greatly improved. 90% would recommend the treatment to others. CONCLUSIONS: PC improves symptom relief and reduces episodes of cellulitis and ulceration in lower-extremity lymphedema. It is well tolerated by patients and should be recommended as an adjunct to standard lymphedema therapy. Screening for venous insufficiency is recommended.

Gender Differences in Aortic Neck Morphology in Patients with Abdominal Aortic Aneurysms Undergoing Elective Endovascular Aneurysm Repair.

BACKGROUND: Previous studies have demonstrated that women tend to have adverse aortic neck morphology leading to exclusion of some women from undergoing endovascular aneurysm repair (EVAR). The objective of this study is to investigate differences in aortic neck morphology in men versus women, changes in the neck morphology and sac behavior after EVAR, and investigate how these features may influence outcomes. METHODS: We conducted a retrospective review of elective EVARs (2004-2013). We excluded patients who underwent elective EVAR with no postoperative imaging available and those patients with fenestrated repairs. Using TeraRecon and volumetric analysis, several features were investigated. These included percent thrombus, shape, length, angulation of the neck, and changes in neck and abdominal aortic aneurysm diameter. RESULTS: A total of 146 patients were found to meet inclusion criteria (115 men and 31 women) with similar baseline characteristics. Neck angulation was greater in women (23.9° vs. 13.5°; P < 0.028). The percent thrombus in women was higher than men (35.4% vs. 31%; P < 0.02). Abdominal aneurysm's were smaller in women at 1 year (4.2 cm vs. 5.1 cm; P < 0.002), and secondary interventions were higher in men (11.3% vs. 0%; P < 0.05). Other features such as neck shape, changes in neck diameter, neck length, and percent oversizing of graft where not statistically different between genders. CONCLUSIONS: Gender differences in neck characteristics and changes in neck morphology do not appear to adversely affect EVAR outcomes. Longer follow-up is necessary to further assess whether these findings are clinically durable.

Relationship between iliofemoral venous stenting and femoropopliteal deep venous reflux.

OBJECTIVE: Severe presentations of chronic venous insufficiency can result from reflux or obstruction at the deep venous, perforator, or superficial venous levels. Iliofemoral venous stenting can be used to address central venous obstruction; however, its effects on deep venous reflux (DVR) have remained unclear. The purpose of the present study was to evaluate the effects of iliac vein stenting on femoropopliteal DVR with the hypothesis that ultrasound evidence of DVR would remain absent or would have improved after iliac vein stenting. METHODS: The present study was a retrospective review of patients who had undergone iliofemoral venous stenting from 2013 to 2018. The patients were divided into two cohorts according to the preprocedural presence (group A) or absence (group B) of femoropopliteal DVR. Baseline patient variables were collected, including age, gender, CEAP (clinical, etiologic, anatomic, pathophysiologic) class, presence of concomitant superficial or perforator reflux, deep vein thrombosis history, and additional venous interventions. The primary outcome evaluated was the persistent absence or resolution of DVR on the latest venous duplex ultrasound at follow-up. Other outcomes included the follow-up CEAP classification and the need for secondary deep venous interventions. RESULTS: A total of 275 consecutive patients had undergone iliofemoral venous stenting. Of the 275 patients, 58 had presented with DVR (group A). A comparison of groups A and B revealed that group A had had a greater likelihood of prior deep vein thrombosis (P = .0001) and a higher frequency of superficial venous ablation. The remaining demographic variables did not differ significantly between the two groups. Of the 58 patients in group A, DVR had resolved at follow-up in 17 (P = .0001). When stratified by level, 7 of these 17 patients had had isolated popliteal reflux. In group B, DVR had developed at follow-up in 6 of the 217 patients. The CEAP class had improved from before intervention (C0, 1.1%; C1, 0.4%; C2, 1.8%; C3, 41.4%; C4, 24.9%; C5, 5.9%; C6, 24.5%) to the latest follow up (C0, 4.9%; C1, 1.9%; C2, 5.7%; C3, 34.2%; C4, 22.8%; C5, 17.1%; C6, 13.3%). Significant improvement had occurred in C6 disease within both groups (group A, 16 of 58 [27.6%; P = .0078]; group B, 19 of 217 [8.8%; P = .0203]). CONCLUSIONS: For patients who undergo iliofemoral venous stenting, DVR could improve if present initially and is unlikely to develop if not present before stenting. A cohort of patients had experienced persistent DVR and warranted further evaluation. Prospective studies are required to corroborate the safety, efficacy, and durability of iliofemoral venous stenting for patients with DVR.

A multidisciplinary team approach to hydroxyurea-associated chronic wound with squamous cell carcinoma.

Hydroxyurea (HU) has been shown to induce a variety of cutaneous adverse reactions, including severe leg ulcers. This report shows a successful treatment of a HU-induced chronic wound associated with squamous cell carcinomas (SCC). A 62-year-old patient affected with polycythemia vera and treated with HU for 10 years, presented with a non healing ulcer on a left heel. The patient gave a history of suffering from the wound for over 2 years. Biopsy showed evidence of invasive SCC. The patient underwent Mohs surgery and a greater saphenous vein ablation for polycythemia vera-associated vascular complications. The wound consistently decreased in size following successive debridements and coverage with human skin equivalent. The wound healed completely after a 6-month period. A multidisciplinary team approach to the treatment proved to be effective resulting in healing of this multifactorial chronic ulcer.

Mesenchymal stem cell therapy and delivery systems in nonhealing wounds.

OBJECTIVE: The objective of the study was to inform wound care practitioners of mesenchymal stem cell application for nonhealing wounds. Recent advances in delivery systems are also discussed in order to highlight potential improvements toward clinical application of stem cell therapy for chronic wounds. DATA SOURCES: MEDLINE and PubMed Central were searched for scientific studies regarding the use of mesenchymal stem cells and delivery systems in wound healing. STUDY SELECTION: Preclinical studies using stem cells as therapeutic modality for chronic wounds were selected for this review. DATA EXTRACTION: Information on study design, sample size and characteristics, stem cell source, type of delivery systems, and rate and time of wound closure was abstracted. DATA SYNTHESIS: Application of mesenchymal stem cells improved wound healing in experimental and clinical settings. Advances in stem cell therapy and delivery vehicles offer promising alternatives to current limited therapeutic modalities for chronic wounds. CONCLUSIONS: Stem cell therapy has recently emerged as a promising therapeutic strategy for nonhealing wounds. Further research is needed to evaluate the relationship between the various delivery systems and stem cells in order to maximize their therapeutic effects. Development of novel delivery vehicles for stem cells can open new opportunities for more effective cell therapy of chronic wounds.

Endovascular Treatment of Spontaneous Renal Artery Dissection After Failure of Medical Management.

Spontaneous renal artery dissection (SRAD) is a rare disease with approximately 200 cases reported in the literature. The severity of renal compromise, the anatomic location of the dissection, and the presence of uncontrollable hypertension are used to guide the initial management of SRAD. However, there are no reported guidelines for managing the progression of SRAD after acute failure of medical management. In this case, a 40-year-old man with a recently diagnosed SRAD was managed appropriately with therapeutic anticoagulation, yet presented with progression of his dissection and a new acute renal infarct. A covered endovascular stent was used to successfully control dissection progression and prevent further renal compromise.

Shortened protocol for radiofrequency ablation of perforator veins.

BACKGROUND: Routine radiofrequency ablation (RFA) of an incompetent perforator vein (IPV) using the standard treatment protocol at 85°C has a treatment time of 6 minutes. To make treatment time more efficient, we sought to determine the effect of a shortened protocol for radiofrequency stylet (RFS) ablation by comparing the early success using three different temperatures: 85°C, 90°C, and 95°C. METHODS: A retrospective study examined 642 procedures of IPV closures in 255 patients with varying degrees of venous insufficiency treated with RFA from 2009 to 2015. The Covidien (Mansfield, Mass) RFA system allows the operator to regulate temperature and allows increments in temperature of the RFS to 85°C, 90°C, and 95°C. The RFS probe was angled at four 90-degree angles at the mentioned temperatures with a shorter treatment time at 6, 4, and 3 minutes, respectively. The three different treatment protocols were compared. All patients had comparative preoperative and postoperative duplex ultrasound scans. Postoperative duplex ultrasound scans were performed 3 to 7 days after the procedure. Successful obliteration was defined as lack of color flow on postoperative duplex ultrasound scanning. Clinical correlation with age, gender, laterality, presenting symptoms (Clinical, Etiology, Anatomy, and Pathophysiology [CEAP] classification), location, and vein diameter was also performed. RESULTS: Of the 255 patients who underwent RFS ablation, 138 were female, with a mean age of 65 years (standard deviation, ±14.6 years). These patients had CEAP presentations from C1 to C6 (0 C1, 1 C2, 57 C3, 118 C4, 4 C5, 75 C6). The location of the 642 IPVs was distributed as 472 in the calf and 170 in the ankle; 322 of these procedures were performed on the right leg. Use of a shortened protocol had no significant effect on the early obliteration rates with the 85°C, 90°C, and 95°C protocols, which were 66.1%, 61.8%, and 67.1%, respectively. Significant correlation was seen between location of targeted vein and successful obliteration (P < .001). There was a borderline inverse linear association between higher stylet temperature and successful obliteration in the proximal calf at 85°C. After accounting for within-patient correlation, the middle and distal calf continued to show higher nonobliteration compared with the ankle. No clinical correlation with age, gender, laterality, presenting symptoms of CEAP, or vein diameter was observed. CONCLUSIONS: The study showed that shortening the protocol time for RFA of the perforator did not make a significant difference in the early success rate, regardless of the temperature. The overall early success rate is still low (65.1%). RFA of perforator veins has a higher successful closure rate in proximal calf and ankle areas compared with the middle and distal calf.

Mesenteric venous thrombosis.

OBJECTIVE: This review explores the current literature on the natural history, diagnosis, and management of mesenteric venous thrombosis (MVT) in the modern era. METHODS: A review of the contemporary literature from 1997 to 2016 on MVT and its pathogenesis, diagnosis, and treatment was performed. RESULTS: MVT is an insidious and lethal disease associated with acute mesenteric ischemia. The prevalence of MVT has increased sharply during the past two decades commensurate with an increase in radiographic imaging for abdominal complaints. The optimal treatment of and approach to MVT is controversial, given the poorly understood natural history of this rare disease. Both endovascular and open surgical strategies in addition to systemic anticoagulation have been used as adjuncts to treat MVT with limited success. Despite advances in treatment, mortality associated with MVT is still high. Furthermore, recent studies have shown that failure to recanalize the portomesenteric venous system leads to an increased risk for development of sequelae of portal hypertension. CONCLUSIONS: MVT is a challenging disease to treat, given the difficulty in establishing a prompt initial diagnosis and the inability to reliably monitor patients for evidence of impending bowel infarction. Careful selection of patients for endovascular, open, or hybrid approaches is key to achieving improved outcomes. However, the paucity of prospective data and our evolving understanding of the natural history of MVT make consensus treatment strategies difficult to ascertain.

Mesenteric vein thrombosis can be safely treated with anticoagulation but is associated with significant sequelae of portal hypertension.

BACKGROUND: Mesenteric venous thrombosis (MVT) is a relatively uncommon but potentially lethal condition associated with bowel ischemia and infarction. The natural history and long-term outcomes are poorly understood and under-reported. METHODS: A single-institution retrospective review of noncirrhotic patients diagnosed with MVT from 1999 to 2015 was performed using International Classification of Diseases, Ninth Revision and radiology codes. Patients were excluded if no radiographic imaging was available for review. Eighty patients were identified for analysis. Demographic, clinical, and radiographic data on presentation and at long-term follow-up were collected. Long-term sequelae of portal venous hypertension were defined as esophageal varices, portal vein cavernous transformation, splenomegaly, or hepatic atrophy, as seen on follow-up imaging. RESULTS: There were 80 patients (57.5% male; mean age, 57.9 ± 15.6 years) identified; 83.3% were symptomatic, and 80% presented with abdominal pain. Median follow-up was 480 days (range, 1-6183 days). Follow-up radiographic and clinical data were available for 50 patients (62.5%). The underlying causes of MVT included cancer (41.5%), an inflammatory process (25.9%), the postoperative state (20.7%), and idiopathic cases (18.8%). Pancreatic cancer was the most common associated malignant neoplasm (53%), followed by colon cancer (15%). Twenty patients (26%) had prior or concurrent lower extremity deep venous thromboses. Most patients (68.4%) were treated with anticoagulation; the rest were treated expectantly. Ten (12.5%) had bleeding complications related to anticoagulation, including one death from intracranial hemorrhage. Four patients underwent intervention (three pharmacomechanical thrombolysis and one thrombectomy). One patient died of intestinal ischemia. Two patients had recurrent MVT, both on discontinuing anticoagulation. Long-term imaging sequelae of portal hypertension were noted in 25 of 50 patients (50%) who had follow-up imaging available. Patients with long-term sequelae had lower recanalization rates (36.8% vs 65%; P = .079) and significantly higher rates of complete as opposed to partial thrombosis at the initial event (73% vs 43.3%; P < .005). Long-term sequelae were unrelated to the initial cause or treatment with anticoagulation (P = NS). CONCLUSIONS: Most cases of MVT are associated with malignant disease or an inflammatory process, such as pancreatitis. A diagnosis of malignant disease in the setting of MVT has poor prognosis, with a 5-year survival of only 25%. MVT can be effectively treated with anticoagulation in the majority of cases. Operative or endovascular intervention is rarely needed but important to consider in patients with signs of severe ischemia or impending bowel infarction. There is a significant incidence of radiographically noted long-term sequelae from MVT related to portal venous hypertension, especially in cases of initial complete thrombosis of the mesenteric vein.

Disparities in initial presentation and treatment outcomes of diabetic foot ulcers in a public, private, and Veterans Administration hospital.

BACKGROUND: Disparities in diabetic foot ulcer (DFU) treatment outcomes are well described, although few studies identify risk factors contributing to disparate healing and amputation rates. In a unique academic center serving urban public, private, and veteran patients, we investigated amputation and healing rates and specific risk factors for disparate treatment outcomes. METHODS: A retrospective chart review of diabetic patients with a new diagnosis of a foot ulcer at geographically adjacent, but independent public, private, and Veterans Administration (VA) hospitals was conducted. Healing and lower extremity amputation outcomes were assessed. RESULTS: Across the three hospitals, 234 patients met the inclusion criteria. Patients at the VA hospital were older (mean 72.5 years; P < 0.001) and had gangrenous ulcers (mean 14.1%; P < 0.001) compared with patients in the private and public hospitals. Public hospital patients were mostly Hispanic (mean 54%; P < 0.001) with a shorter duration of diabetes (mean 12.8 years; P = 0.02), but were more poorly controlled than VA and private hospital patients (P ≤ 0.001). Prior amputation (odds ratio [OR] 1.97; P = 0.016) and non-Caucasian race (OR 2.42; P = 0.004) increased the risk of amputation on multivariate analysis. Osteomyelitis (P = 0.0371) and gangrene (P < 0.001) are independent risk factors for amputation. Across all three hospitals, 42.3% of patients were treated by amputation (6.8% private, 12% public and 23.5% VA; P < 0.001). CONCLUSION: In a single triumvirate health care system where the patient population is stratified primarily by insurance, VA patients have significantly higher amputation rates compared with patients at adjacent private and public hospitals. The VA patients are largely racial minorities with advanced DFU progression to gangrenous ulcers.

The role of stem cells in the treatment of diabetic foot ulcers.

Diabetic foot ulcers (DFUs) are a significant and rapidly growing complication of diabetes and its effects on wound healing. Over half of diabetic patients who develop a single ulcer will subsequently develop another ulcer of which the majority will become chronic non-healing ulcers. One-third will progress to lower extremity amputation. Over the past decade, the outcomes for patients with DFUs ulcers have not improved, despite advances in wound care. Successful treatment of diabetic foot ulcers is hindered by the lack of targeted therapy that hones in on the healing processes dysregulated by diabetes. Stem cells are a promising treatment for DFUs as they are capable of targeting, as well as bypassing, the underlying abnormal healing mechanisms and deranged cell signaling in diabetic wounds and promote healing. This review will focus on existing stem cell technologies and their application in the treatment of DFUs.

A histopathologic basis for surgical debridement to promote healing of venous ulcers.

BACKGROUND: Pathologic analysis of deep tissue obtained during debridement of venous ulcers is often unnoticed in its importance. We previously reported pathologic findings on 139 patients with venous ulcers. The objective of this study was to correlate the pathologic findings in venous ulcers with wound healing to establish a negative margin for debridement. STUDY DESIGN: Consecutive patients with a lower extremity venous ulcer present for at least 4 weeks, presenting to a single wound healing center, were included. Wounds underwent aggressive surgical debridement beyond the subcutaneous level until judged to have a viable base. Specimens were scored based on cellularity, vascularity, collagen composition, inflammation, and dense fibrosis, with a highest possible score of 13. Healing was the primary outcome for analysis. RESULTS: Of the 26 patients who met inclusion criteria, only 50% of them (13 patients) with a total of 18 venous ulcers underwent surgical debridement available for pathologic analysis. Mean ulcer area was 34.7 cm(2) at initial presentation, and 89% of patients had a continuous positive healing curve as measured by decreasing wound area (from 34.7 cm(2) to 14.3 cm(2)). However, specimens with dense fibrosis, decreased cellularity, mature collagen, and pathology score less than 10 were predominantly nonhealing ulcers. CONCLUSIONS: Presence of dense fibrosis and high levels of mature collagen in deep tissue specimens are significant correlative factors in nonhealing of venous ulcers. We recommend deep debridement on all venous ulcers that are refractory to healing until the level of absence of dense fibrosis and mature collagen is reached to promote venous ulcer healing.

Disparities in the initial presentation of differentiated thyroid cancer in a large public hospital and adjoining university teaching hospital.

BACKGROUND: Healthcare disparities associated with insurance and socioeconomic status have been well characterized for several malignancies, such as lung cancer. To assess whether there are healthcare disparities in thyroid cancer, this study evaluated the stage on initial presentation of patients with differentiated thyroid cancer (DTC) in a public versus university teaching hospital. METHODS: A retrospective chart review was performed to identify patients with a new diagnosis of DTC from January 1, 2007, to January 1, 2010, in a large public and adjoining university teaching hospital at a single academic medical center. Medical records were reviewed for demographics, pathology, and American Joint Committee on Cancer tumor-node-metastasis stage at initial presentation. RESULTS: There were 49 cases of well-DTC (96% papillary and 4% Hürthle) in the public hospital and 370 cases (95% papillary, 2% Hürthle, and 3% follicular) in the university teaching hospital. Median age (years) at presentation was 50 in the public versus 48 in the university teaching hospital (p=0.39). Ninety-six percent of public hospital patients were from ethnic minorities compared with 16% of university teaching hospital patients (p<0.0001). Only 1 (2%) public hospital patient had private insurance compared with 85% of university teaching hospital patients. Tumor status (p=0.002) and stage (p=0.03) were more advanced and extrathyroidal extension (p=0.02) was more prevalent among public hospital patients compared with university teaching hospital patients. In a multivariable analysis, public hospital, male gender, increasing age, advanced tumor status, and the presence of lymphovascular invasion were the best predictors of more advanced disease stage. Public hospital patients were 3.4 times more likely to present with advanced DTC than university teaching hospital patients of the same age, gender, tumor status, and lymphovascular invasion status (95% confidence interval 1.29-8.95). CONCLUSIONS: In a public hospital, where the patient population is defined primarily by insurance status, patients were more likely to present with advanced-stage DTC than patients presenting to an adjacent university teaching hospital. These results suggest a disparity in the stage on initial presentation of DTC, possibly resulting in a delayed diagnosis of cancer.