Leg Volume Research Articles

Effects of light compression on chronic venous disease, edema and comfort in women during pregnancy and postpartum period: a prospective randomized study.

Lower limb edema associated with venous disorders is an increasingly common problem in pregnant women. The study aimed to assess the use of compression class 1 (ccl1=18-21 mmHg) in lower limb edema and CVD prevention in pregnant and postpartum women. 51 pregnant women (second trimester) were randomly recruited into either a study group CG with compression ccl1 or a control group NCG, both with physical activity (PA) recommendation. The assessment concerned venous system condition, limb size, and compression comfort. Edema was diagnosed as ≥10% measurement increase. Venous reflux (8/22 CG, 1/16 NCG) and an onset of CVD (6/22 CG, 1/16 NCG) were diagnosed in the first measurement. After postpartum, a significant reduction of the great saphenous vein (GSV) diameter in the proximal part of the left lower limb in CG (P=0.014) and expansion of the small saphenous vein (SSV) in the proximal part of the left lower limb in NCG (P=0.028) were observed. An analysis of the limb sizes in the second measurement revealed a significant increase of all circumferences and volumes in the NCG, and of lower leg volumes in the CG. Edema was diagnosed in five women in the NCG in the second measurement. Consequently, compression was recommended for the new group (NCG+C), and a significant edema reduction (P=0.026) occurred in the third measurement. Compression ccl1 reduces the risk of edema, venous insufficiency, and improves women's quality of life during pregnancy and postpartum.

Comparison of leg volume ratio between inguinal lymphadenectomy and inguino-pelvic lymphadenectomy in patients with skin cancer of the lower extremity

BackgroundThe timing of intervention to treat lymphedema differs among facilities. Understanding differences in the prevalence and severity of lymphedema following different surgical procedures for lymphadenectomy could promote early intervention to treat lymphedema. There is currently little evidence to support the notion that inguino-pelvic lymphadenectomy is associated with greater morbidity than inguinal lymphadenectomy, although it is believed that the difference in the extent of surgery results in a difference in severity of lymphedema. In this study, we compared volume percentage change between inguinal lymphadenectomy and inguino-pelvic lymphadenectomy in patients with skin cancer of the lower extremity. Patients and MethodsTwenty-nine patients with skin cancer of a lower extremity who underwent lymphadenectomy were classified into an inguinal lymphadenectomy group and an inguino-pelvic lymphadenectomy group. The increase in the volume of the affected side compared with that of the unaffected side in the whole lower extremity, thigh, and lower leg was calculated on volume-rendered computed tomography images. ResultsThe mean volume percentage increase in the inguinal lymphadenectomy group and inguino-pelvic lymphadenectomy group was respectively 6.72% and 11.18% in the whole lower extremity and 7.30% and 2.55% in the lower leg, showing no statistically significant differences. One the other hand, the mean volume percentage increase in the respective groups was 7.03% and 19.78% in the thigh, showing a statistically significant difference (p=0.0275 < 0.05). ConclusionsThe findings of this study indicate that the leg volume of the whole lower extremity may not have worse outcomes in inguino-pelvic lymphadenectomy compared with inguinal lymphadenectomy.

Comparison of the effects of cold water immersion and percussive massage on the recovery after exhausting eccentric exercise: A three-armed randomized controlled trial.

Athletic training requires both challenging stimuli for adaptation and sufficient recovery for improved performance. While cold water immersion (CWI) is already a popular recovery method, handheld percussive massage (PM) devices have also gained popularity in recent years. This study aims to assess the effects of CWI and PM on performance recovery after strenuous eccentric exercises compared to a passive rest (PR) control condition. Thirty-four healthy physically active participants (9 females, 25 males) were randomly divided into three groups: CWI (n = 11), PM (n = 11), and passive rest (PR) (n = 12). They underwent an exhausting eccentric exercise protocol and different measurements at six time points (baseline, POST1, POST2, POST24, POST48, and POST72) over the time course of 72h. These included subjective assessments of muscle soreness and perceived stiffness as well as measures of skin temperature, leg volume, creatine kinase activity, and three different jump tests. The eccentric exercise protocol consisted of 15min downhill running (slope: 12%, speed: 10km/h) and 3 sets of successive depth jumps (dropping height: 0.5m) until individual exhaustion. After POST1 measurements, participants received 12min of either CWI (11 ± 0.5°C), PM (40Hz) or PR (supine posture). No significant group effects were found for the number of depth jumps performed during the exhaustion protocol. All jump tests displayed a significant group × time interaction effect. Post-hoc analysis indicated significant lower jump heights in ΔPOST2 between CWI and both PM and PR. No other significant group effects were observed at any time point. No significant group × time interaction effects were noted for CK, leg volume, and soreness. The perceived stiffness showed a significant group × time interaction effect. Post-hoc analysis revealed a significant decrease in stiffness for PM compared to PR at ΔPOST2. Neither CWI nor PM showed any significant improvement in performance recovery over the 72-h period following strenuous eccentric exercise compared to PR. CWI showed an immediate performance decline which may be attributed to a cold-related reduction in motor nerve conduction velocity.

Trunk-to-leg volume and appendicular lean mass from a commercial 3-dimensional optical body scanner for disease risk identification

Body shape expressed as the trunk-to-leg volume ratio is associated with diabetes and mortality due to the associations between higher adiposity and lower lean mass with Metabolic Syndrome (MetS) risk. Reduced appendicular muscle mass is associated with malnutrition risk and age-related frailty, and is a risk factor for poor treatment outcomes related to MetS and other clinical conditions (e.g.; cancer). These measures are traditionally assessed by dual-energy X-ray absorptiometry (DXA), which can be difficult to access in clinical settings. The Shape Up! Adults trial (SUA) demonstrated the accuracy and precision of 3-dimensional optical imaging (3DO) for body composition as compared to DXA and other criterion measures. Here we assessed whether trunk-to-leg volume estimates derived from 3DO are associated with MetS risk in a similar way as when measured by DXA. We further explored if estimations of appendicular lean mass (ALM) could be made using 3DO to further improve the accessibility of measuring this important frailty and disease risk factor. SUA recruited participants across sex, age (18-40, 40-60, >60 years), BMI (under, normal, overweight, obese), and race/ethnicity (non-Hispanic [NH] Black, NH White, Hispanic, Asian, Native Hawaiian/Pacific Islander) categories. Each participant had whole-body DXA and 3DO scans, and measures of cardiovascular health. The 3DO measures of trunk and leg volumes were calibrated to DXA to express equivalent trunk-to-leg volume ratios. We expressed each blood measure and overall MetS risk in quartile gradations of trunk-to-leg volume previously defined by National Health and Nutrition Examination Survey (NHANES). Finally, we utilized 3DO measures to estimate DXA ALM using ten-fold cross-validation of the entire dataset. Participants were 502 (273 female) adults, mean age=46.0±16.5y, BMI=27.6±7.1kg/m2 and a mean DXA trunk-to-leg volume ratio of 1.47±0.22 (females: 1.43±0.23; males: 1.52±0.20). After adjustments for age and sex, each standard deviation increase in trunk-to-leg volume by 3DO was associated with a 3.3 (95% odds ratio [OR]=2.4-4.2) times greater risk of MetS, with individuals in the highest quartile of trunk-to-leg at 27.4 (95% CI: 9.0-53.1) times greater risk of MetS compared to the lowest quartile. Risks of elevated blood biomarkers as related to high 3DO trunk-to-leg volume ratios were similar to previously published comparisons using DXA trunk-to-leg volume ratios. Estimated ALM by 3DO was correlated to DXA (r2=0.96, root mean square error=1.5kg) using ten-fold cross-validation. Using thresholds of trunk-to-leg associated with MetS developed on a sample of US-representative adults, trunk-to-leg ratio by 3DO after adjustments for offsets showed significant associations to blood parameters and MetS risk. 3DO scans provide a precise and accurate estimation of ALM across the range of body sizes included in the study sample. The development of these additional measures improves the clinical utility of 3DO for the assessment of MetS risk as well as the identification of low muscle mass associated with poor cardiometabolic and functional health.

High-intensity interval training with functional electrical stimulation cycling for incomplete spinal cord injury patients: A pilot feasibility study.

Consequences of spinal cord injury (SCI) with a sedentary lifestyle will progress to muscle weakness and muscle atrophy, leading to muscle fatigue. This study aimed to determine the feasibility and preliminary effects of high-intensity interval training (HIIT) using functional electrical stimulation (FES) cycling on changes in thigh muscle volume and muscle strength, in patients with incomplete SCI. Eight incomplete SCI patients (mean age 50 years; 6 women) with stable SCI paraplegia (mean 6.75 years since injury) participated in the HIIT FES cycling (85%-90% peak Watts; 4 × 4-min intervals) three times a week (over 6 weeks). The main outcomes were adherence, participant acceptability, and adverse events. Secondary outcomes were muscle strength (peak torque) and leg volume changes. Our findings revealed that the program was well-received by participants, with high levels of adherence, positive feedback, and satisfaction, suggesting that it could be a promising option for individuals seeking to enhance their lower body strength and muscle mass. Additionally, all participants successfully completed the training without any serious adverse events, indicating that the program is safe for use. Finally, we found that the 6-week HIIT FES leg cycling exercise program resulted in notable improvements in isometric peak torque of the quadriceps (range 13.9%-25.6%), hamstring muscle (18.2%-23.3%), and leg volume (1.7%-18.2%). This study highlights HIIT FES leg cycling exercise program potential as an effective intervention for improving lower limb muscle function.

Reliability, concurrent validity, and clinical feasibility of measurement methods determining volume in patients with lower limb lymphedema and healthy controls

Purpose To investigate reliability, concurrent validity, and clinical feasibility of measurements assessing volume in patients with lower limb lymphedema (LLL) and healthy controls. Materials and methods To investigate intra- and interrater reliability, 47 patients with LLL and 30 healthy controls were assessed three times by two assessors. To investigate between session reliability, 50 participants were reassessed two weeks later. Each assessment included measurements of the midline region (hip circumference; suprapubic volume), leg volume (perimeter every 4 cm; Perometer®), and foot volume (water displacement; figure-of-eight method). Concurrent validity was assessed with correlation coefficients. Measurements were timed and practical limitations were reviewed. Clinical trial registration number: NCT: 05269264. Results Measurements of the total volume of different regions showed weak to very high intraclass correlation coefficients (ICCs) (0.131–998). Absolute and relative volume differences had lower ICC values (0.360–0.976). A strong correlation was found between the total volumes of the same region. The Perometer® and figure-of-eight method were the fastest method for leg and foot volume, respectively. Conclusions The assessed total volumes might be more valuable in assessing the evolution of volume in bilateral LLL than the calculated absolute and relative differences between both limbs. The Perometer® and figure-of-eight method were the most time efficient for leg and foot volume, respectively. Implications for rehabilitation Lymphedema is a chronic condition for which a reliable and clinically feasible assessment of volume is essential for the diagnosis, treatment decisions, and the evaluation of the treatment. This study shows that the total leg/foot volumes were more reliable than the calculated absolute and relative differences between both limbs and could therefore more valuable to evaluate bilateral lower limb lymphedema. For the assessment of leg volume, the Perometer® was the most reliable and fastest method. For the evaluation of the foot volume, the figure-of-eight method was overall the best method.

Becoming a World Champion Powerlifter at 71Years of Age: It Is Never Too Late to Start Exercising.

This case study assessed body composition, muscle strength, cardiorespiratory fitness, and metabolic health of the present female world champion powerlifter in the 70+ age category who started resistance exercise training at 63years of age with no prior experience with structured exercise training. Measures of body composition (magnetic resonance imaging, computed tomography, and dual-energy X-ray absorptiometry scanning, leg volume); strength (one-repetition maximum leg press and extension, maximum voluntary contraction, and handgrip strength); physical function (short physical performance battery); cardiorespiratory fitness (peak oxygen consumption); and metabolic health (oral glucose tolerance test) were assessed. In addition, a muscle biopsy was collected to assess muscle fiber type distribution and cross-sectional area (CSA). Where possible, data were compared with previously (un)published sex- and age-matched data using z scores. Skeletal muscle mass index was calculated by dividing limb muscle mass by height squared. Data from the control groups are expressed as mean ± 95% confidence interval. Our participant (age: 71years; body mass: 64.5kg; body mass index: 27.6kg/m2) reported a good bone mineral density of 1.09g/cm2 (T score between -1 and +1) and very low values of abdominal and organ body fat (i.e.,between 20% and 70% lower compared with a reference group of postmenopausal women). In addition, she showed a 33% greater skeletal muscle mass index when compared with healthy, older female control subjects (7.9 vs. 5.9 [5.7-6.2] kg/m2; n = 61) as well as 37% greater muscle quadriceps CSA (63.8 vs. 46.6 [44.5-48.7] cm2; n = 48) and 46% greater Type II muscle fiber CSA (4,536 vs. 3,097 [2,707-3,488] μm2; n = 19). Absolute leg press muscle strength was 36% greater (190 vs. 140 [132-147] kg; n = 30) and handgrip strength was 33% greater (33 vs. 25 [23-26] kg; n = 48) when compared with healthy, age-matched controls. In conclusion, even for resistance exercise naïve individuals, starting exercise at an advanced age can lead to improvements in body composition and muscle strength allowing older adults to reduce the risk for developing metabolic syndrome, live independently, and even compete at a world class level.

Assessing the Physical and Clinical Characteristics of a New Adjustable Compression Wrap: Insights from a Single-center Pilot Study in India

Introduction: Adjustable wraps are a revolutionary avenue in compression therapy because of their ease of application and removal, as well as their ability to be manipulated and readjusted, particularly in older adult patients with leg ulcers. Methods: We analyzed the physical and clinical features of a new adjustable wrap marketed by Vein Care, India. Hirai leg was used to demonstrate the stiffness of the wrap, followed by validation on five healthy male participants. Next, we conducted a pilot clinical study to assess the effect of wearing the wrap for 4 h on volume reduction in seven patients with open leg venous ulcers. Results: The Vein Care Calf Compression Wrap® functioned similarly to a short stretch bandage, which we demonstrated through the tests performed on Hirai’s leg and on healthy participants. In the pilot clinical study, following 4 h of application, a statistically significant decrease in total leg volume (median 34.5 cc; P = 0.018) was observed. Moreover, a significant decrease in volume at the calf level compared to the lower leg (P = 0.038) was noticed. However, no significant correlations were found in volumetric reduction with age or body mass index. The wrap posed challenges in applying pressure exceeding 40 mmHg due to its unique composition, stretch, and stiffness properties. This characteristic is especially significant for patients with diabetic or mixed arteriovenous ulcers (ankle–brachial index &gt;0.5 and &lt;0.8). Conclusions: The wrap’s clinical utility and effectiveness necessitate additional clinical trials and studies with a greater number of patients from diverse demographics.

Improvements in edema and microcirculation in chronic venous insufficiency with Pycnogenol® or elastic compression.

Chronic venous insufficiency (CVI) is the consequence of venous valve reflux and/or venous flow obstruction and resulting venous hypertension in the lower extremities. The aim of this prospective supplement registry study was to evaluate the efficacy of compression stockings or Pycnogenol® in controlling symptoms and edema in CVI and their efficacy on microcirculatory parameters. Two comparable groups of 30 subjects with CVI were observed for 4 months. Elastic compression was less tolerated than Pycnogenol® with 12 subjects being unable to follow the compression routine. No side effects due to supplementation were observed; tolerability of the supplementation was optimal. Ambulatory venous pressure (AVP) and refilling time (RT) at inclusion indicated a significant increase in venous pressure and reflux (refilling time <16 seconds). AVP and RT did not change after 4 months. Microcirculatory and clinical measurements were comparable at inclusion between the 2 groups. After 4 months, skin resting flux (RF) and skin PO<inf>2</inf>-PCO<inf>2</inf> were significantly improved with Pycnogenol® compared to compression (P<0.05). The significant increase in skin PO<inf>2</inf> and the decrease in PCO<inf>2</inf> after Pycnogenol® intake were ascribed to the decrease in the abnormally high skin resting flux, a sign of better perfusion and skin nutritional supply. Pycnogenol® reduced leg volume, on average by 18.3% in the evening compared to 4.4% of reduction with compression (P<0.05) showing an important effect on edema. The venous Clinical Severity Score (VCSS) and the composite symptom score (CSS) decreased significantly in the Pycnogenol® group compared to compression, indicating a better improvement in microcirculatory perfusion and nutritional supply produced by the supplementation of Pycnogenol® in comparison with compression. Pycnogenol® significantly improved microcirculation and clinical symptoms in comparison with compression. The decrease in local oxidative stress (OS) at the distal perimalleolar region with Pycnogenol® was significant in comparison with compression (P<0.05). A lower local OS is an important metabolic indication of a better capillary perfusion with better nutritional exchanges. At the end of the registry study, four small ulcerations and skin breaks in four limbs (between 3 and 5 mm of maximum diameters) were observed in the compression group. No ulcerations or skin breaks were observed in the Pycnogenol® group. Pycnogenol® relieved edema, improved microcirculation in CVI patients and reduced stationary, interstitial fluid in comparison with compression. Most symptoms of CVI are associated with interstitial water retention; the presence of extra fluid in limb tissues alters perfusion and nutrient supply. Pycnogenol® supplementation reduced water and fluid accumulation in CVI limbs and improved microcirculation and local oxidative stress thus showing important anti-edema effects.

Benefits of an Adjustable Compression Garment System for the Reduction of Chronic Leg Oedema (ACROE Study)

This study aimed to assess whether a specific adjustable compression garment (ACG) system (Coolflex Standard Calf and Coolflex Standard Foot; Sigvaris Inc.) promotes self care in patients with chronic leg oedema. Secondary aims were to assess the effectiveness of this ACG in reducing oedema, improving patient reported outcomes, and determining the patients' degree of satisfaction with the handling of the wrap. This was a multicentre prospective observational study. The study included 99 adult patients aged between 18 and 90 years presenting with chronic oedema of the lower extremity, which encompasses conditions such as lymphoedema, venous oedema, and phlebolymphoedema. At baseline, all patients received an ACG. After two to three days and after six weeks, their overall satisfaction with the therapy was assessed. Leg volume was determined in a contactless manner during the baseline and follow up visits. All patients completed the cross-cultural adaptation of the Lymphoedema Functioning, Disability and Health Questionnaire for Patients with Lymphoedema of the Lower Extremity in Germany (Lymph-ICF-UG). A total of 86 patients completed the study and were followed up for six weeks. At the final six week follow up , 82 (95.3%) of the 86 subjects indicated that they were able to put on the wrap independently or with a little help from relatives. The overall satisfaction rate was 88.5% (95% confidence interval [CI], 80.4 - 94.1%). The mean leg volume reduction from baseline to six weeks was -4.7% (95% CI -6.3 - -3.0%; p < .001). Lymph-ICF-UG scores and scores in all domains improved significantly from baseline to the final follow up. The ACG used in this study was found to promote self care in a high proportion of patients with chronic leg oedema. A significant reduction in oedema was observed.

Segmental differences in daytime changes of leg volume.

The aim of our study was to comparatively assess volume changes related to daily occupation of the whole leg (WLv), of the lower leg (LLv) and of the upper leg (ULv) in subject with no venous and lymphatic disorders. WLv, LLv, and Ulv were evaluated by water displacement volumetry (WDV) in the morning and in the evening in 20 healthy subjects. In the legs with occupational edema (OE), WLv increased by 7.07%, LLv by 5.25%, and ULv by 9.80%. In legs without clear OE, WLv increased by 2.41%, LLv by 1.35, and ULv by 3.38%. Surprisingly, the increase of ULv was greater than that of LLv. An evening increase in the leg volume also occurred in legs with no clear OE. In our series, a clinically evident OE was related to an increase of the WLv, LLv, and ULv greater than 5.83%, 8.68%, and 1.88%, respectively.

LEG volume 30 issue 1 Cover and Front matter

LEG volume 30 issue 1 Cover and Front matter

LEG volume 30 issue 1 Cover and Back matter

LEG volume 30 issue 1 Cover and Back matter

Disability and emotional symptoms in women with lipedema: A comparison with overweight/obese women.

Lipedema is characterized by the painful abnormal deposition of adipose tissue in the lower limbs and is often misdiagnosed as obesity. Considering the numerous bothersome physical symptoms of lipedema, women with lipedema may have greater disability and emotional problems than women with lifestyle-induced obesity. Our study aims to assess disability, anxiety and depression symptoms in women with lipedema compared to women with overweight/obesity. Women with lipedema (n = 45, with a mean age of 41 years) and women who are overweight/obese (n = 43, with a mean age of 44.95 years) were asked to complete the following questionnaires: The World Health Organization Disability Assessment Schedule (WHO-DAS II), Beck's Depression Inventory - II (BDI-II), and The Hospital Anxiety and Depression Scale (HADS). Despite the higher BMI in the overweight/obesity group, the group with lipedema was more disabled in numerous domains of the WHO-DAS II questionnaire, including Life activities - domestic, work and school responsibilities and Participation in society When the influence of BMI was adjusted, a difference in the domain of Mobility was also present. The study groups did not differ in anxiety and depression symptoms. We showed that behavioral impairment was the main factor affecting functioning in women with lipedema. Emotional symptoms did not differentiate the study groups. Leg volumes and adipose tissue pain intensity were associated with greater disability in women with lipedema, and should be considered in managing women with this condition and in future research estimating the effectiveness of lipedema treatment.

Performance of an adjustable compression wrap in occupational leg swelling.

Edema in some subjects worsens over time and wraps help to reduce the leg volume. An adjustable compression wrap was tried on volunteers for 5 h and volumes measured in each limb before and after wrapping using a 3D surface scanner (HandySCAN 3D®) to estimate the volume of the leg. The contralateral leg was used as control. We observed a significant decrease in volume in the wrap legs and an increase in the control legs (p < .001), both in the lower part of leg (p = .001) and in the upper part (p = .001). Using the Readywrap® for 5hours significantly reduces the leg volume. This study enables Readywrap to be studied in a population that is easy to observe in the context of a research program. The Handyscan3D® was shown accurate and reproducible to assess leg volume in future studies.

Efficacy of Airbo·Wave in Nighttime Compression for Leg Lymphedema.

Objectives: This study aimed to clarify the efficacy of Airbo·Wave EV1 in nighttime compression therapy as part of complex decongestive therapy (CDT) for leg lymphedema. Patients and Methods: We retrospectively reviewed 33 patients with leg lymphedema who used Airbo·Wave EV1 between April 2021 and September 2022. In these patients, the changes in leg volume and skin hardness were assessed using a scale ranging from 1 (softest) to 7 (hardest), and dermal thickness before and after the use of Airbo·Wave EV1 was evaluated. Results: Twenty-two patients used Airbo·Wave EV1 for nighttime compression in CDT. Their skin hardness in the lower calf decreased mildly (mean scale: before, 3.9; after, 3.6 [p <0.05]), but the leg volume and skin thickness were unchanged. Eleven patients who were nonadherent could restart compression therapy by using Airbo·Wave EV1. Their skin hardness in the medial lower calf (before, 5.1; after, 4.3 [p <0.05]), leg volume (before, 8412 mL; after, 8191 mL [p <0.01]), and skin thickness in the medial and lateral lower leg were reduced. Conclusion: Airbo·Wave EV1 could improve skin hardness in the calf area. Moreover, it is a safe procedure for the nonadherent while reducing leg volume reasonably.

Investigation of the Relationship of Arm and Leg Volume with Anaerobic Power, Balance and Strength Characteristics in Elite Judokas

The aim of this study is to investigate the relationship between arm and leg volume, and anaerobic power, balance and strength characteristics in elite Judokas. 15 national Judokas participated in the study voluntarily from Burdur Municipality Sports Club. Frustum method to determine the arm and leg volumes of the athletes, Wingate anaerobic power test to determine their anaerobic performance, stabilometric balance platform test to determine the dynamic balance performances, and 1 RM method to determine the strength levels. “Spearman” Correlation Analysis was used to determine the relationship between the force, anaerobic power and balance results. Considering the results of the athletes, there was a significant relationship between peak power (Watt), mean power (Watt), average power (Watt / kg) and leg volume, while no relation was found in all other values. There was found no relation between the total leg volume and anaerobic power values in female Judokas, the total arm and leg volume and dynamic balance values of the male and female Judokas, the total arm and leg volumes of male Judokas with 1 RM. When the relation of total arm and leg volumes with 1 RM values in female Judokas was examined, positive significant relationship was found in calf raise repetition; no relation was found in all other values. To conclude, it can be suggested to sports scientists and coaches that they should plan training programs to enhance the strength and anaerobic power characteristics of Judokas.

A comparative performance analysis of thermoelectric generators with a novel leg geometries

Thermoelectric (TE) devices utilize the Seebeck effect to produce electricity from waste heat. The optimization of TE leg geometry and its structure has lately drawn more attention to improving TE power generators. This study uses the finite element method to examine thermoelectric generators' thermal reliability and performance (TEGs) for novel TE leg designs. New leg shapes, such as a cross-vertical and butterfly, are introduced and contrasted with the squared (conventional) leg and other leg shapes, such as trapezoidal, cross-horizontal, I-shaped, X-shaped, and Y-shaped. The design of the main geometric parameters, including structure, height, volume, and surface area of the thermoelectric leg, is discussed in detail. As the TE leg has a larger heated surface area, the results demonstrate that the cross-vertical and butterfly legs perform 39.2% and 30.4%, respectively, higher than the squared (conventional) shape. However, the square-shaped leg shows the least thermal stress compared to other designs, especially at high thermal gradients. For low-temperature gradients (Th < 100 °C), the new TE leg designs of the cross-vertical and butterfly structures exhibit thermal stresses below the yield stress of bismuth telluride, indicating that their use is suitable for upcoming low-temperature gradient thermoelectric system applications.

Complete Reduction of Leg Lymphedema after Liposuction: A 5-Year Prospective Study in 67 Patients without Recurrence

Background: Lymphedema leads to adipose tissue deposition that cannot be removed using conservative methods. Previous studies have shown a complete reduction in excess volume in limbs with lymphedema when treated with liposuction and controlled compression therapy (CCT). We present the long-term outcomes of all patients treated with liposuction and CCT for lower extremity lymphedema (LEL) who were followed up for 5 years. Methods: Sixty-seven LEL patients underwent liposuction and CCT. Thirty-six patients had primary lymphedema and 31 patients had secondary lymphedema. The outcomes included excess leg volume over a follow-up period of 5 years. Any association between patient characteristics and treatment outcomes was analyzed. Results: The preoperative excess volume prior was 3515 mL [interquartile range (IQR): 2225–5455 mL], and the volume ratio to the unaffected leg was 1.35 (IQR: 1.25–1.53). One year after treatment, the excess volume decreased by 101% (IQR: 84–116). The decrease in excess volume continued during the 5-year follow-up, and at the end of the study, the excess volume had decreased by 115% (IQR: 98–124). No major complications were noted. Conclusions: Liposuction and CCT are safe and effective procedures for removing excess adipose tissue and normalizing the leg volume in patients with late-stage LEL. When no satisfactory results are obtained with conservative methods, such as complex decongestive therapy, and there is no or minimal pitting on limb examination, excess adipose tissue is present, and liposuction can be considered.

LEG volume 29 issue 4 Cover and Front matter

LEG volume 29 issue 4 Cover and Front matter