[Show abstract][Hide abstract] ABSTRACT: To analyze angiotomographic parameters of juxtarenal aneurysms to assess the applicability of an endograft model to patients and to create in vitro and in vivo models to assess the new endograft.
A total of 49 patients with juxtarenal aneurysms were submitted to angiotomographic evaluation, and parameters such as the aortic diameter, the length of the neck, and the angulations of the celiac trunk, superior mesenteric artery and renal arteries; the distances between them; and anatomic variations were analyzed. Based on these parameters, an endograft model was developed and tested in a newly created in vitro model of juxtarenal aneurysm. An experimental model of juxtarenal aneurysm was then established in six pigs weighing 50-60 kg to assess the new endograft model.
The angiotomographic parameters of juxtarenal aneurysm measured in this study were similar to those reported in the literature and allowed the development of an endograft based on the hourglass concept, which was applicable to 85.8% of the patients. The in vitro model of juxtarenal aneurysm evidenced good radiopacity and functionality and permitted adjustments in the new device and technical improvements in the procedures for treating these aneurysms. In addition, the porcine model of juxtarenal aneurysm was successfully created in all six animals using a bovine pericardial patch, and use of the new endograft in three pilot procedures evidenced its feasibility.
The Hourglass endograft was rendered applicable to treatment of the majority of patients with juxtarenal aneurysms simply by changing its diameter. Moreover, the new in vitro and in vivo models were shown to be effective for assessing both the presented endograft and experiments assessing the endovascular treatment of juxtarenal aneurysms.
[Show abstract][Hide abstract] ABSTRACT: to compare the biological efficacy of generic enoxaparin (HeptronTM) versus branded Sanofi-Aventis enoxaparin for prophylaxis and treatment of lower-extremity deep venous thrombosis (DVT) in a prospective, randomized, open-label study.
patients with diagnosed lower-extremity DVT (therapeutic branch, n=57) and patients requiring venous thromboembolism (VTE) prophylaxis after arterial vascular surgery or major lower-extremity amputations (prophylactic branch, n=57) were randomized to receive generic or branded enoxaparin for up to seven days. Enoxaparin activity was measured by estimating blood anti-factor Xa levels at the peak plasma concentration. As secondary outcomes, development or progression of VTE events, major adverse events and major bleeding events were considered for efficacy and safety comparisons.
DVT therapy: twenty-five patients received generic enoxaparin while 32 received branded enoxaparin (subcutaneous, 1 mg/kg BID). Mean percentages of anti-factor Xa levels within the target ranges were 62 ± 35.4% and 67.5 ± 24.7%, respectively (p= .035 for non-inferiority). No patient presented DVT progression, clinically detectable pulmonary embolism, or major bleeding events in any subgroup. DVT prophylaxis: Thirty patients received generic enoxaparin and 27 received branded enoxaparin (subcutaneous, 40 mg/day). Mean percentages of anti-factor Xa levels within the target ranges were 77.9 ± 30.9% and 77.8 ± 32.9%, respectively (p = .009 for non-inferiority). There were no cases of VTE or major bleeding events in any subgroup.
generic and branded enoxaparins exhibited similar in vivo responses as measured by the anti-factor Xa activity, as well as similar clinical efficacy and safety outcomes.
Revista da Associação Médica Brasileira 01/2015; 61(1):44-50. DOI:10.1590/1806-9282.61.01.044 · 0.92 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: BACKGROUND
Facial hyperhidrosis can lead to serious emotional distress. Video-assisted
thoracic sympathectomy resolves symptoms effectively, though it may be associated
with compensatory hyperhidrosis, which may be more common in patients undergoing
resection of the second thoracic ganglion. Oxybutynin has been used as a
pharmacological approach to facial hyperhidrosis but the long-term results of this
treatment are unclear.
To evaluate the use of low oxybutynin doses in facial hyperhidrosis patients for
at least six months.
61 patients were monitored for over six months and assessed according to the
following variables: impact of hyperhidrosis on quality of life (QOL) before
treatment and after six weeks, evolution of facial hyperhidrosis after six weeks
and at the last consultation, complaints of dry mouth after six weeks and on last
return visit, and improvement at other hyperhidrosis sites.
Patients were monitored for 6 to 61 months (median=17 months). Thirty-six (59%)
were female. Age ranged from 17-74 (median:45). Pre-treatment QOL was poor/very
poor in 96.72%. After six weeks, 100% of patients improved QOL. Comparing results
after six weeks and on the last visit, 91.8% of patients maintained the same
category of improvement in facial hyperhidrosis, 3.3% worsened and 4.9% improved.
Dry mouth complaints were common but not consistent throughout treatment. More
than 90% of patients presented moderate/great improvement at other hyperhidrosis
Patients who had a good initial response to treatment maintained a good response
long-term, did not display tachiphylaxis and experienced improvement on other
[Show abstract][Hide abstract] ABSTRACT: Palmar hyperhidrosis (PH) is a common illness that significantly impacts Quality of Life (QOL). Oxybutynin offers excellent short-term results, but long-term follow-up results are limited. We evaluated its effectiveness in a large group of patients who did not have surgery and who had at least 6 months of follow-up.
Between September 2007 and September 2013, 570 consecutive patients were enrolled in our institutional protocol regarding the "pharmacological-first" treatment of primary PH with oxybutynin. Fifty-nine were lost to follow-up, and the data were available for 511 patients treated for at least 6 weeks. Data recorded at the start of the protocol, 6 weeks after beginning treatment, and during patients' final visits were analyzed.
112 patients (21.9 %) did not improve and were referred for surgery (sympathectomy). Eight (1.56 %) developed significant side effects (e.g., dry mouth) and discontinued therapy. Thirty (5.9 %) preferred surgery over pharmacological treatment. 111 have not yet received treatment for 6 months. The 246 patients with more than 6 months of follow-up (median 16 months, range 6-72) were analyzed, as follows: 90.2 % experienced moderate or great improvement in their PH; 90.34 % experienced improvement at other sites of hyperhidrosis following a median of 16 months.
Among patients with good initial responses to oxybutynin, more than 90 % experienced moderate or great improvement in their palmar sweating, as well as in their hyperhidrosis in other sites, after 6 months. The results were particularly favorable in those patients with BMI <25 kg/m(2), and in those who noted an improved QOL after 6 weeks.
Clinical Autonomic Research 11/2014; DOI:10.1007/s10286-014-0264-8 · 1.86 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: To analyze the characteristics of patients with abdominal aortic aneurysms referred to a tertiary center and to compare with individuals with abdominal aortic aneurysm found at necropsy.
[Show abstract][Hide abstract] ABSTRACT: This systematic review focuses on the 30-day mortality associated with open surgery and fenestrated endografts for short-necked (<15 mm) juxtarenal abdominal aortic aneurysms. A search for studies published in English and indexed in the PubMed and Medline electronic databases from 2002 to 2012 was performed, using "juxtarenal abdominal aortic aneurysm" and "treatment" as the main keywords. Among the 110 potentially relevant studies that were initially identified, eight were in accordance with the inclusion criteria in the analysis. Similar outcomes for open and endovascular repair were observed for 30-day mortality. No differences were observed regarding the secondary outcomes (duration of surgery, hospital stay, postoperative renal dysfunction and late mortality), except that the late mortality rate was significantly higher for the patients treated with open repair after a median follow-up of 24 months. Fenestrated endografting is a viable alternative to conventional surgery in juxtarenal abdominal aortic aneurysms with a proximal neck <15 mm.
[Show abstract][Hide abstract] ABSTRACT: OBJECTIVES:
Primary hyperhidrosis usually affects the hands, armpits, feet and cranio-facial region. Sweating in other areas is common in secondary hyperhidrosis (after surgery or in specific clinical conditions). Oxybutynin has provided good results and is an alternative for treating hyperhidrosis at common sites. Our aim was to evaluate the efficacy of oxybutynin as a treatment for primary sweating at uncommon sites (e.g., the back and groin).
This retrospective study analyzed 20 patients (10 females) who received oxybutynin for primary focal hyperhidrosis at uncommon sites. The subjects were evaluated to determine quality of life before beginning oxybutynin and six weeks afterward and they were assigned grades (on a scale from 0 to 10) to measure their improvement at each site of excessive sweating after six weeks and at the last consult.
The median follow-up time with oxybutynin was 385 days (133-1526 days). The most common sites were the back (n = 7) and groin (n = 5). After six weeks, the quality of life improved in 85% of the subjects. Dry mouth was very common and was reported by 16 patients, 12 of whom reported moderate/severe dry mouth. Five patients stopped treatment (two: unbearable dry mouth, two: excessive somnolence and one: palpitations). At the last visit, 80% of patients presented with moderate/great improvement at the main sites of sweating.
After six weeks, more than 80% of the patients presented with improvements in their overall quality of life and at the most important site of sweating. Side effects were common (80% reported at least one side effect) and caused 25% of the patients to discontinue treatment. Oxybutynin is effective for treating bothersome hyperhidrosis, even at atypical locations and most patients cope well with the side effects.
[Show abstract][Hide abstract] ABSTRACT: Background. Hyperhidrosis may affect nearly 3% of the population, and thoracic/lumbar sympathectomy has been highly effective. Compensatory hyperhidrosis is a risk associated with surgical procedures, and its treatment is both complex and not well defined. Treatment of primary hyperhidrosis with oxybutynin has yielded positive results; however, its use in compensatory hyperhidrosis (CH) has not been described. Methods. Twenty-one patients (11 female patients) received oxybutynin for severe CH at a median of 5 years after sympathectomy. Patients were evaluated to determine quality of life before starting oxybutynin and 6 weeks afterward; they assigned grades to determine improvement after 6 weeks and at their last consult visit for each site at which they complained of symptoms. Results. Six and 15 patients underwent operation for axillary hyperhidrosis and palmar hyperhidrosis, respectively. Median follow-up time with oxybutynin was 377 days (49-1,831 days). Most common CH sites were the back (n = 8) and abdomen (n = 5). After 6 weeks, the quality of life improved in 71.4% of patients. Five patients stopped treatment: 2 because of unbearable dry mouth, 1 because of absence of pharmacologic response, 1 because of excessive somnolence, and 1 because of probable tachyphylaxis. At the last visit, 71.4% of patients presented with moderate to major improvement at the main sites at which sweating was noted. Conclusions. More than 70% of patients presented with improved overall quality of life and improvement at the most prominent site of compensatory sweating. Longterm treatment was ineffective in less than 25% of patients, primarily because of the side effects of dry mouth and somnolence. Oxybutynin appears to be effective in treating bothersome CH. (C) 2014 by The Society of Thoracic Surgeons
The Annals of Thoracic Surgery 08/2014; 98(5). DOI:10.1016/j.athoracsur.2014.05.087 · 3.63 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Introduction
Axillary hyperhidrosis (AH) is a common disease, with significant impact in Quality of Life (QOL). Good short term results are reported with oxybutynin, but longer follow-up data are lacking. We evaluated its effectiveness in a large series of patients who were not surgically treated and who had at least six months of follow-up.
Patients and Methods
From September 2007 to September 2013, 431 consecutive patients were enrolled in “pharmacological first” protocol for treatment of AH with oxybutynin. Thirty-four patients were lost to follow-up, and data are available for 397 patients treated for at least six weeks. Data at the start of the protocol, six weeks after beginning treatment, and at final visit were analyzed.
One hundred fourteen patients (28.7%) did not improve and were referred for surgery (sympathectomy). Eight patients (2.01%) presented significant side effects (e.g., dry mouth) and discontinued therapy. Twenty-six patients (9.4%) preferred surgery over pharmacological treatment. Sixty two patients have not yet been under treatment for six months. The 181 patients with more than six months of follow-up (median 17 months, range 6-72) were analyzed: 82.9% of patients presented moderate or great improvement in AH, 89% presented improvement in other sites of hyperhidrosis after a median of 17 months.
In patients with good initial response to oxybutynin, more than 80% presented moderate or great improvement in axillar and in other sites of excessive sweating. Results were particularly better in females and those who presented better QOL after six weeks.
Annals of Vascular Surgery 07/2014; 28(5). DOI:10.1016/j.avsg.2013.12.024 · 1.03 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Objective : Our aim was to analyze the effectiveness of oxybutynin for hyperhidrosis treatment in patients over 40 years. Methods : Eighty-seven patients aged over 40 years were divided into two groups. One group consisted of 48 (55.2%) patients aged between 40 and 49 years, and another was composed of 39 (44.8%) patients aged over 50 years (50 to 74 years). A comparative analysis of Quality of Life and level of hyperhidrosis between the groups was carried out 6 weeks after a protocol treatment with oxybutynin. A validated clinical questionnaire was used for evaluation. Results : In the younger age group, 75% of patients referred a "partial" or "great" improvement in level of hyperhidrosis after treatment. This number was particularly impressive in patients over 50 years, in which 87.2% of the cases demonstrated similar levels of improvement. Over 77% of patients in both groups demonstrated improvement in Quality of Life. Excellent outcomes were observed in older patients, in which 87.1% of patients presented "slightly better" (41%) or "much better" (46.1%) improvement. Conclusion : Patients aged over 40 years with hyperhidrosis presented excellent results after oxybutynin treatment. These outcomes were particularly impressive in the age group over 50 years, in which most patients had significant improvement in Quality of Life and in level of hyperhidrosis.
[Show abstract][Hide abstract] ABSTRACT: Hyperhidrosis is a condition that affects 3% of the general population and intereferes in social, professional and emotional spheres. A growing awareness of this condition and the possibility of treatment have led to an increase in patient demand for effective therapeutic measures. Up until the present moment, thoracoscopic sympathectomy is still the most efficient option for a definite control of excessive sweating. The authors will review the history of sympathectomy, basic anatomical and physiological details and discuss the main indication for video-assisted thoracoscopy sympathectomy (essential hyperhidrosis), summarizing technical details, surgical results and complications, as well as alternatives to sympathectomy.
Expert Review of Dermatology 01/2014; 7(6). DOI:10.1586/edm.12.61
[Show abstract][Hide abstract] ABSTRACT: Background: To evaluate the impact of percutaneous angioplasty (PA), objectively assessed with duplex-ultrasound, on 3-year clinical outcome. Methods: Thirty-nine patients with atherosclerotic disease successfully treated by PA were included (40 limbs). All patients had critical ischemia with rest pain and ischemic ulcers due to infrainguinal obstructions alone. The patients were submitted to duplex ultrasound examination on the day before and on the first or second day after the procedure. Peak systolic velocities (PSV) were recorded in the anterior tibial, posterior tibial, and fibular arteries at the level of distal third of the leg. All patients were followed for 3 years. Comparison between groups with good and bad results were based on perioperative VPS gradient (GPSV) of the mean of the VPS in the 3 arteries. After 3 years, a good result was defined as a patient having no pain and complete healing of a previous ulcer or minor amputations. Results: Mean age was 68.5 +/- 8.1 years with no difference in demographic characteristics (P > 0.05). In 26 cases, the long-term result was good. Healing time ranged from 4 to 130 weeks (median 26.5). Bad long-term results were observed in 12 cases. Two lesions remained un-healed despite patent angioplasty. In 10 cases, a second procedure was carried out (repeat angioplasty in 6 and bypass in 4). TransAtlantic Inter-Society Consensus (TASC) II category A/B registered better clinical success then TASC II category C/D (P < 0.05) at 1-year follow-up but not at 3 years (P = 0.36). Two-year limb salvage was 92.5% +/- 4.2%. Primary patency was 52.5% +/- 9.5% at 3 years. GVPS was 21.9 cm/sec in the good results group and 24.7 cm/sec in the bad results group (P > 0.05). The quality of the initial result, as measured by GPSV, was not associated with long-term success (P > 0.05). Conclusions: An initially successful procedure indicated by the degree of increased flow is not related to long-term durability and ulcer healing.
Annals of Vascular Surgery 12/2013; 28(5). DOI:10.1016/j.avsg.2013.10.020 · 1.03 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: To analyze if there is any relation between functional capacity assessed by subjective and objective methods regarding the current state and after clinical treatment in patients with intermittent claudication.
A total of 500 patients with intermittent claudication were enrolled. All patients underwent clinical examination and a functional evaluation by subjective (clinical visit) and objective method (treadmill test). Additionally, 50 patients were selected to evaluate the effect of clinical treatment by subjective and objective methods in relation to functional capacity.
Out of 500 patients, only 60 (12.0%) had similar results in both methods. The remaining, that is 440 patients (88.0%) had subject values in disagreement with stress test findings. Regarding the clinical effect of the treatment on the functional outcomes, results were similar in both methods (χ²=1.7; p=0.427).
Although the subjective method overestimates the functional capacity when compared to the objective method, no significant differences were observed between both methods when analyzing the effect of clinical treatment. Thus, the subjective method provides similar information as compared with objective method, in monitoring the clinical treatment of patients with intermittent claudication.
[Show abstract][Hide abstract] ABSTRACT: Comorbid conditions are known to increase cardiovascular risk in patients with peripheral artery disease (PAD). However, whether comorbid conditions affect walking capacity remains controversial. Previous studies have analyzed comorbidities separately, but they are known to occur in a clustered fashion in PAD patients. Therefore, the aim of this study was to analyze the influence of clustered comorbid conditions on walking capacity in PAD patients.
This cross-sectional study included 415 PAD patients (155 women and 260 men with an average age of 63 years). Claudication distance and total walking distance were assessed with the graded maximal treadmill test. Medical histories of hypertension, diabetes, cerebrovascular disease (CVD), coronary artery disease (CAD), and chronic obstructive pulmonary disease (COPD) were obtained. Binary logistic regression was carried out to analyze whether clustered comorbid conditions were associated with walking capacity.
CVD was associated with lower total walking distance (odds ratio [OR] = 2.45; 95% confidence interval [CI]: 1.11-5.39). The cluster hypertension, diabetes, CVD, CAD, and COPD were associated with a lower claudication distance (OR = 7.63; 95% CI: 1.42-40.96). In addition, the clusters of CVD and hypertension (OR = 3.16; 95% CI: 1.38-7.23), CVD and CAD (OR = 3.46; 95% CI: 1.25-9.57), CVD, hypertension, and diabetes (OR = 11.38; 95% CI: 2.27-57.00) were associated with a lower total walking distance.
CVD was associated with walking impairment of IC patients and in particular when CVD is clustered with other comorbid conditions.
Annals of Vascular Surgery 11/2013; 28(2). DOI:10.1016/j.avsg.2013.01.020 · 1.03 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: To analyze biomechanical, histologic, and histochemical properties of anterior fragments of abdominal aortic aneurysms (AAA) and to correlate them with the maximum transverse diameter (MTD) and symptoms associated to the aneurysms.
Fragments of the anterior aneurysm wall were obtained from 90 patients submitted to open repair of AAA of degenerative etiology from 2004 to 2009 in the Clinics Hospital of São Paulo University Medical School. Two specimens were produced from the fragments: one for histologic analysis for quantification of collagen fibers, elastic fibers, smooth muscle cells, and degree of inflammatory activity and the other for uniaxial tensile test to assess biomechanical failure properties of the material, such as strength, tension, and stress. Cases were classified according to symptoms and to the AAA MTD.
Fragments from AAA with MTD ≥ 5.5 cm showed higher values for biomechanical failure properties than those of AAA with MTD < 5.5 cm (strength, 5.32 ± 2.07 × 4.1 ± 2.41 N; tension, 13.83 ± 5.58 × 10.82 ± 6.48 N/cm; stress, 103.02 × 77.03 N/cm(2); P < .05). No differences were observed between the groups in relation to failure strain (0.41 ± 0.12 × 0.37 ± 0.14; P = .260) and thickness of the fragments (1.58 ± 0.41 × 1.53 ± 0.42 mm; P = .662). The average values of fiber compositions of all the fragments were as follows: collagen fibers, 44.34 ± 0.48% and 61.85 ± 10.14% (Masson trichrome staining and Picrosirius red staining, respectively); smooth muscle cells, 3.46 ± 2.23% (immunohistochemistry/alpha-actin); and elastic fibers, less than 1% (traces) (Verhoeff-van Gieson staining). No differences in fiber percentages (collagen, elastic, and smooth muscle) were observed in fragments from AAA with MTD ≥5.5 cm and <5.5 cm, but more intense inflammatory activity was seen in larger AAA (grade 3; 70% × 28.6%; P = .011). Compared with asymptomatic aneurysms, symptomatic aneurysms showed no differences in the biomechanical failure properties (strength, 5.32 ± 2.36 × 4.65 ± 2.05 N; P = .155; tension, 14.08 ± 6.11 × 12.81 ± 5.77 N/cm; P = .154; stress, 103.02 × 84.76 N/cm(2); P = .144), strain (0.38 ± 0.12 × 0.41 ± 0.13; P = .287), thickness of the fragments (1.56 ± 0.41 × 1.57 ± 0.41 mm; P = .848), and histologic composition (collagen fibers, 44.67 ± 11.17 × 44.02 ± 13.79%; P = .808; smooth muscle fibers, 2.52 × 2.35%; P = .751; elastic fibers, <1%) CONCLUSIONS: Fragments of the anterior wall from larger aneurysms were more resistant than those from smaller AAA, with no tissue properties that could explain this phenomenon in the histologic or histochemical analyses utilized.
Journal of vascular surgery: official publication, the Society for Vascular Surgery [and] International Society for Cardiovascular Surgery, North American Chapter 07/2013; 59(5). DOI:10.1016/j.jvs.2013.04.064 · 2.98 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: We compared the prevalence of risk factors between young and old individuals with significant carotid atherosclerosis. We retrospectively reviewed the records of patients aged 39 to 55 years (group I) and aged ≥60 years (group II) with significant atherosclerotic stenosis at the carotid bifurcation. Group I patients had significantly higher values for the following factors: weight, height, body mass index, diastolic pressure, prevalence of current smoking, total and low-density lipoprotein cholesterol and significant lower values for systolic pressure, creatinine, and prevalence of coronary artery disease. Group I patients were more symptomatic and showed higher rates of carotid occlusion and near occlusion. Atherosclerosis of the carotid bifurcation was more aggressive in the younger group, with a higher rate of occlusion and near occlusion. Obesity and smoking were significant risk factors for young patients in this sample.