Search Results (7)

Objective: Chronic edema, whether systemic or localized, is often underrecognized by providers due to limited awareness of its prevalence and debilitating impact. As result, patients suffering from this condition live with suboptimal management, diminished quality of life, and increased healthcare costs. Non-pneumatic compression devices (NPCDs) have been shown to be safe and more clinically effective in treating lymphedema (LED) than advanced pneumatic compression devices (APCD) in multiple published studies. In the latest study, the TEAYS trial, NPCDs showed superior clinical utility, better outcomes, and higher patient adherence than APCDs for managing lower extremity swelling. This sub-analysis of the TEAYS study focuses on outcomes for patients aged 65 and above diagnosed with lymphedema in the lower extremity. Methods: This trial was a randomized, crossover, head-to-head study across nine sites in the US in 2023. Patients were subjected to an initial 4-week washout period and then randomized to either the NPCD or a commercially available APCD. Patients used the randomly assigned initial device for 90 days followed by a second washout period before a 90-day use of the second device. Results: Analysis included a total of 71 patients with lower extremity lymphedema, 27 of whom were aged 65 or above, and this subset comprises the study cohort for the current study. These patients achieved statistically greater mean limb volume reduction (353.9 ± 99.17 mL) while on NPCD vs. APCD (−10.7 ± 125.59 mL). NPCD also showed significantly better improvement in overall quality of life (1.43 ± 0.45) vs. APCD (−0.10 ± 0.34). Statistically significant improvement in adherence was also observed while on NPCD (77%) vs. APCD (23%). No device-related adverse events were reported. Conclusions: For adults aged 65 and older with lower extremity lymphedema, non-pneumatic compression devices (NPCDs) demonstrated superior clinical outcomes—including greater limb volume reduction, improved mobility, higher adherence, and patient satisfaction—compared to advanced pneumatic compression devices (APCDs), supporting NPCDs as an effective, patient-preferred solution. Full article

Lipedema is a painful disease of subcutaneous adipose tissue (SAT) in women. This study determined whether an advanced pneumatic compression device (APCD) improved lipedema SAT depth, swelling, and pain. Women with lipedema started 20–30 mm Hg compression leggings then were randomized to an APCD (Lympha Press Optimal Plus) group for 30 days (treatment; n = 22) or a no APCD (Control; n = 24) group. APCD treatment significantly reduced left leg volume (3D imaging, LymphaTech; p < 0.043) and fluid in the left (p = 0.0018) and right legs (p = 0.0476; SOZO, bioimpedance spectroscopy); controls showed no change. Treatment significantly decreased extracellular fluid (ECF) and intracellular fluid (ICF) in left (p = 0.0077; p = 0.0060) and right legs (p = 0.0476; p ≤ 0.025), respectively. Only ECF decreased significantly in the left (p < 0.0183) and right legs (p = 0.0009) in controls. SAT depth decreased significantly by ultrasound after treatment at the anterior (p ≤ 0.0234) and medial thigh (p ≤ 0.0052), medial knee (p ≤ 0.0002) and posterior calf (p ≤ 0.0118) but not in controls. All signs and symptoms of lipedema improved in the treatment group including swelling (p = 0.0005) and tenderness (pain) of right (p = 0.0003) and left legs (p < 0.0001); only swelling improved in controls (p = 0.0377). In total, 87.5% of RAND SF-36 quality of life improved after treatment (p ≤ 0.0351) compared to 37.5% in controls (p ≤ 0.0475). APCDs are effective treatment for lipedema. Full article

Due to a lack of technologies that harvest green and sustainable energy, unutilized compressed air energy during the operation of pneumatic systems is wasted. Liquid–solid triboelectric nano-generators (L-S TENGs) have been widely used as an advanced technology with broad development prospects due to their advantages of a simple structure and long service life. Among them, liquid–solid triboelectric nanogenerators with tube structures have great potential for coupling multiple physical effects and integrating them into a single device. Herein, a U-shaped tube triboelectric nanogenerator composed of fluorinated ethylene propylene (FEP) and copper foil (UFC-TENG) is proposed to directly harvest unutilized compressed air energy. The UFC-TENG can collect unutilized compressed air energy with a stable peak voltage and current of approximately 33 V and 0.25 μA, respectively. When the alternating frequency of the liquid is 0.9 Hz, the unutilized compressed air can drive the UFC-TENG unit with an inner diameter of 12 mm, achieving a maximum output power of 3.93 μW at an external load resistance of 90 MΩ. The UFC-TENG is a novel driving method for L-S TENGs and demonstrates the promising potential of TENGs in the harvesting of unutilized compressed air energy in pneumatic systems. Full article

The prevalence of venous leg ulcers (VLUs) differs between 1.5% and 3% in the general population. The challenge in treating VLUs is common recurrence. Moreover, VLUs can be resistant to healing, despite appropriate treatment. In these cases, advanced wound therapies should be considered. The number of new technologies, applied in VLUs treatment, has increased in the last years. These therapies include biophysical interventions such as ultrasound therapy, electrical stimulations, electromagnetic therapy, or phototherapy. Furthermore, stem cell therapies, biologic skin equivalents, platelet-rich plasma therapy, oxygen therapies, anti-TNF therapy, or negative pressure wound therapy are advanced venous ulcer therapeutic methods that may support the standard of care. Medical devices, such as a muscle pump activator, or intermittent pneumatic compression device, may be especially useful for specific subgroups of patients suffering from VLUs. Some of the above-mentioned technologies require broader evidence of clinical efficacy and are still considered experimental therapies in dermatology. Full article

A new test rig has been designed, built and commissioned, and is now jointly pursued to facilitate experimental investigations into advanced combustion processes (i.e., dual fuel, multi-mode) under turbulent conditions at high, engine-like temperature and pressure levels. Based on a standard diesel engine block, it offers much improved optical access to the in-cylinder processes due to its separated and rotated arrangement of the compression volume and combustion chamber, respectively. A fully variable pneumatic valve train and the appropriate preconditioning of the intake air allows it to represent a wide range of engine-like in-cylinder conditions regarding pressures, temperatures and turbulence levels. The modular design of the test rig facilitates easy optimizations of the combustion chamber/cylinder head design regarding different experimental requirements. The name of the new test rig, Flex-OeCoS, denotes its Flexibility regarding Optical engine Combustion diagnostics and/or the development of corresponding Sensing devices and applications. Measurements regarding in-cylinder gas pressures, temperatures and the flow field under typical operating conditions are presented to complete the description and assessment of the new test rig. Full article

Patients with leg lymphedema sometimes suffer under constraint feeling leg heaviness and pain, requiring lifelong treatment and psychosocial support after surgeries or radiation therapies for gynecologic cancers. We herein review the current issues (a review of the relevant literature) associated with recently developed diagnostic procedures and treatments for secondary leg lymphedema, and discuss how to better manage leg lymphedema. Among the currently available diagnostic tools, indocyanine green lymphography (ICG-LG) can detect dermal lymph backflow in asymptomatic legs at stage 0. Therefore, ICG-LG is considered the most sensitive and useful tool. At symptomatic stage ≥1, ultrasonography, magnetic resonance imaging-lymphography/computed tomography-lymphography (MRI-LG/CT-LG) and lymphosintiography are also useful. For the treatment of lymphedema, complex decongestive physiotherapy (CDP) including manual lymphatic drainage (MLD), compression therapy, exercise and skin care, is generally performed. In recent years, CDP has often required effective multi-layer lymph edema bandaging (MLLB) or advanced pneumatic compression devices (APCDs). If CDP is not effective, microsurgical procedures can be performed. At stage 1–2, when lymphaticovenous anastomosis (LVA) is performed, lymphaticovenous side-to-side anastomosis (LVSEA) is principally recommended. At stage 2–3, vascularized lymph node transfer (VLNT) is useful. These ingenious procedures can help maintain the patient’s quality of life (QOL) but unfortunately cannot cure lymphedema. The most important concern is the prevention of secondary lymphedema, which is achieved through approaches such as skin care, weight control, gentle limb exercises, avoiding sun and heat, and elevation of the affected leg. Full article

Intermittent pneumatic compression (IPC) is a proactive compression therapeutic technique in the prophylaxis of deep vein thrombosis, reduction of limb edema, and treatment of chronic venous ulcers. To appropriately detect and analyze biomechanical pressure profiles delivered by IPC in treatment, a dynamic interface pressure monitoring system was developed to visualize and quantify morphological pressure mapping in the spatial and temporal domains in real time. The system comprises matrix soft sensors, a smart IPC device, a monitoring and analysis software, and a display unit. The developed soft sensor fabricated by an advanced screen printing technology was used to detect intermitted pressure by an IPC device. The pneumatic pressure signals inside the bladders of the IPC were also transiently collected by a data acquisition system and then transmitted to the computer through Bluetooth. The experimental results reveal that the developed pressure monitoring system can perform the real-time detection of dynamic pressures by IPC and display the morphological pressure mapping multi-dimensionally. This new system provides a novel modality to assist in the effective evaluation of proactive compression therapy in practice. The study results contribute to understanding the working mechanisms of IPC and improving its functional design based on intuitive biomechanical characteristics of compression delivery profiles. Full article