scholarly journals An implantable ventilator augments inspiration in an in vivo porcine model

2021 ◽  
Author(s):  
Lucy Hu ◽  
Mossab Saeed ◽  
Manisha Singh ◽  
Ellen Roche
Keyword(s):  
Quality Of Life ◽  
Porcine Model ◽  
Minute Ventilation ◽  
Proof Of Concept ◽  
Respiratory Effort ◽  
Normal Range ◽  
Diaphragm Dysfunction ◽  
Diaphragm Motion

Abstract Severe diaphragm dysfunction can lead to respiratory failure, requiring permanent mechanical ventilation. Permanent tethering to a mechanical ventilator via a patient’s mouth or tracheostomy can interfere with quality of life and autonomy by hindering activities like speech and swallowing. We present a diaphragm assist system that intervenes internally at the diaphragm as opposed to the mouth. By implanting contractile, soft robotic actuators above the diaphragm to push downwards and augment diaphragm motion during inspiration, this diaphragm assist system functions as an implantable ventilator. We demonstrate the proof-of-concept feasibility of this system to augment physiological metrics of ventilation in an in vivo porcine model of varied respiratory insufficiency. Synchronized actuation of the assist system with native respiratory effort augmented the tidal volume by up to a 100 mL increase and was capable of improving minute ventilation into a normal range. The diaphragm assist system has the potential to provide a new therapeutic ventilation option that aims to restore respiratory performance without sacrificing quality of life.

scholarly journals A prescribed walking regimen plus arginine supplementation improves function and quality of life for patients with pulmonary arterial hypertension: a pilot study

2017 ◽  
Vol 8 (1) ◽  
pp. 204589321774396 ◽  
Author(s):  
Mary Beth Brown ◽  
Attie Kempf ◽  
Catherine M. Collins ◽  
Gary M. Long ◽  
Matthew Owens ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Pulmonary Arterial Hypertension ◽  
Arterial Hypertension ◽  
Current Evidence ◽  
Proof Of Concept ◽  
Concept Study ◽  
Sf 36 ◽  
Pulmonary Arterial ◽  
Arginine Supplementation

Current evidence suggests that exercise training is beneficial in pulmonary arterial hypertension (PAH). Unfortunately, the standard supervised, hospital-based programs limit patient accessibility to this important intervention. Our proof-of-concept study aimed to provide insight into the usefulness of a prescribed walking regimen along with arginine supplementation to improve outcomes for patients with PAH. Twelve PAH patients (all women) in New York Heart Association (NYHA) functional class (FC) II (n = 7) or III (n = 5) and in stable condition for ≥ 3 months were enrolled. Patients performed home- and fitness-center- based walking at 65–75% heart rate (HR) reserve for 45 min, six sessions/week for 12 weeks. Concomitant L-arginine supplementation (6000 mg/day) was provided to maximize beneficial endothelial training adaptations. Cardiopulmonary exercise testing, 6-min walk testing (6MWT), echocardiography, laboratory studies, and quality of life (QoL) survey (SF-36) were performed at baseline and 12 weeks. Eleven patients completed the study (72 session adherence rate = 96 ± 3%). Objective improvement was demonstrated by the 6MWT distance (increased by 40 ± 13 m, P = 0.01), VO2max (increased by 2 ± 0.7 mL/kg/min, P = 0.02), time-to-VO2max (increased by 2.5 ± 0.6 min, P = 0.001), VO2 at anaerobic threshold (increased by 1.3 ± 0.5 mL/kg/min, P = 0.04), HR recovery (reduced by 68 ± 23% in slope, P = 0.01), and SF-36 subscales of Physical Functioning and Energy/Fatigue (increased by 70 ± 34% and 74 ± 34%, respectively, P < 0.05). No adverse events occurred, and right ventricular function and brain natriuretic peptide levels remained stable, suggesting safety of the intervention. This proof-of-concept study indicates that a simple walking regimen with arginine supplementation is a safe and efficacious intervention for clinically stable PAH patients, with gains in objective function and QoL measures. Further investigation in a randomized controlled trial is warranted.

scholarly journals Thoracoscopic Ablation with Appendage Ligation versus Medical Therapy for Stroke Prevention a Proof-of-Concept Randomized Trial

2016 ◽  
Vol 11 (2) ◽  
pp. 99-105 ◽  
Author(s):  
Thomas M. Beaver ◽  
Vishnumurthy Shushrutha Hedna ◽  
Anna Y. Khanna ◽  
William M. Miles ◽  
Catherine C. Price ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Medical Management ◽  
Stroke Prevention ◽  
Normal Sinus Rhythm ◽  
Recurrent Stroke ◽  
Outcome Variable ◽  
Concept Design ◽  
Proof Of Concept ◽  
Surgical Morbidity

Objective Atrial fibrillation (AF) has a demonstrable effect on quality of life (QOL). Recurrent stroke occurs in 10% of patients with AF. The objective of this study was to demonstrate proof of concept that thoracoscopic pulmonary vein isolation and atrial appendage ligation (TPVIAL) could prevent recurrent stroke and could potentially improve QOL in patients with AF with a previous stroke. Methods The study was a National Institutes of Health-funded single-center proof-of-concept design that randomized 23 patients with AF-related stroke to TPVIAL (n = 12) or to medical management (n = 11). Quality of life was the primary outcome variable; secondary end points included restoration of rhythm, recurrent stroke, and surgical morbidity. Results Quality-of-life subscores at 3 and 6 months revealed improvements in energy and decreases in fatigue in the TPVIAL arm [baseline, 33 (19.8); 3 months, 49.5 (20.6), P = 0.01; 6 months, 55.5 (14.4), P = 0.03]. At 12-month follow-up, there were no recurrent strokes in the TPVIAL group. In the medically treated arm, two patients at 6 months (P = 0.22) and three total patients at 12 months (P = 0.09) had recurrent ischemic stroke. There was one death in the medical management arm. In the TPVIAL arm, no AF recurrence occurred in patients with paroxysmal AF, and one patient had recurrence of persistent and long-standing AF. Seven patients in the TPVIAL arm discontinued warfarin therapy for secondary stroke prevention. Conclusions This small proof-of-concept study showed that TPVIAL improved QOL on two subscores and restored normal sinus rhythm in all but one patient, and it showed the potential to prevent secondary stroke. A larger study will be needed.

Breast cancer-related lymphedema and quality of life: A qualitative analysis over years of survivorship

2019 ◽  
pp. 174239531987279
Author(s):  
Allison B Anbari ◽  
Ausanee Wanchai ◽  
Jane M Armer
Keyword(s):  
Breast Cancer ◽  
Quality Of Life ◽  
Healthcare Providers ◽  
Breast Cancer Diagnosis ◽  
Data Saturation ◽  
Breast Cancer Related Lymphedema ◽  
Reported Data ◽  
The Impact

Objectives The study purpose was to examine perspectives of women with newly diagnosed breast cancer-related lymphedema (BCRL) regarding their quality of life over seven years. Method Data were collected over seven years using the Lymphedema and Breast Cancer Questionnaire (LBCQ). Participants with BCRL answered open-ended questions corresponding to changes in mood and lifestyle from post-op through annual interviews and surveys. Self-reported data from 97 participants with BCRL were analyzed using in vivo coding and template-style content analysis to elicit the impact of BCRL on quality of life domains. Results Data saturation was achieved as participants neared 30 to 36 months post- breast cancer diagnosis. Three major themes were identified related to BCRL’s impact on: physical function; daily living and social function; and psychological function. Discussion Findings suggest that BCRL impacts quality of life not only soon after diagnosis, but also throughout survivorship years. Healthcare providers should develop programs to enhance quality of life for survivors with BCRL.

Mycophenolate for persistent complex regional pain syndrome, a parallel, open, randomised, proof of concept trial

2018 ◽  
Vol 18 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Andreas Goebel ◽  
Anu Jacob ◽  
Bernhard Frank ◽  
Paul Sacco ◽  
Guillermo Alexander ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Pain Intensity ◽  
Complex Regional Pain Syndrome ◽  
Rating Scales ◽  
Rating Scale ◽  
Pain Syndrome ◽  
Analysis Of Covariance ◽  
Proof Of Concept ◽  
Numeric Rating

Abstract Background and aims: Current therapies for persistent complex regional pain syndrome (CRPS) are grossly inadequate. With accruing evidence to support an underlying immunological process and anecdotal evidence suggesting potential efficacy of mycophenolate, we wished to explore the feasibility and effectiveness of this treatment in patients with CRPS. Methods: A randomised, open, parallel, proof of concept trial was conducted. Patients with Budapest research criteria CRPS of >2-year duration and moderate or high pain intensity (numeric rating scale score ≥5) were enrolled. Eligible patients were randomised 1:1 to openly receive mycophenolate as add-on treatment, or their usual treatment alone, over 5.5 months. They then switched to the other treatment arm for 5.5 months. The main outcome was average the patients’ average pain intensity recorded over 14 days, between 5.0 and 5.5 months post randomisation, on 11-point (0–10) numeric rating scales, compared between trial arms. Skin sensitivities and additional outcomes were also assessed. Results: Twelve patients were enrolled. Nine provided outcomes and were analysed for the main outcome. Mycophenolate treatment was significantly more effective than control [drug-group mean (SD): pre: 7.4 (1.2)- post: 5.2 (1.3), n=4, control: pre: 7.7 (1.4)- post: 8.1 (0.9), n=5; −2.8 (95% CI: −4.7, −1.0), p=0.01, analysis of covariance]. There were four treatment responders (to mycophenolate treatment either before, or after switch), whose initial exquisite skin hyper-sensitivities, function and quality of life strongly improved. Side effects including itchiness, skin-cryptitis, increased pain, and increased depression caused 45% of the subjects to stop taking mycophenolate. Conclusions: Mycophenolate appears to reduce pain intensity and improve quality of life in a subgroup of patients with persistent CRPS. Implications: These results support the feasibility of conducting a definite trial to confirm the efficacy and effect size of mycophenolate treatment for persistent CRPS (EudraCT 2015-000263-14).

scholarly journals Ginsenoside Rg3 Sensitizes Colorectal Cancer to Radiotherapy through Downregulation of Proliferative and Angiogenic Biomarkers

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Taiguo Liu ◽  
Lina Duo ◽  
Ping Duan
Keyword(s):  
Quality Of Life ◽  
Colorectal Cancer ◽  
Gene Products ◽  
Ginsenoside Rg3 ◽  
Mobility Shift ◽  
Antitumor Effects ◽  
Fractionated Radiotherapy ◽  
Mobility Shift Assay

Background. Radiation therapy is an important mode of colorectal cancer treatment. However, most people die of local recurrence after tumors become resistant to radiotherapy, and little progress has been made in treating radiotherapy-resistant colorectal cancer. Hence, novel agents that are nontoxic and can sensitize colorectal cancer to radiotherapy are urgently needed. Ginsenoside Rg3, a saponin extracted from ginseng, shows cytotoxicity against a variety of cancer cells through suppression of pathways linked to oncogenesis, including cell survival, proliferation, invasion, and angiogenesis. In this article, we investigated whether Rg3 can sensitize colorectal cancer to radiation in vivo. Methods and Materials. We established CT-26 xenografts in BALB/c mice and treated them with vehicle, Rg3, radiation, and combined Rg3 + radiation. Mouse quality of life, survival, tumor volumes, and inhibitive rates were estimated. NF-κB activation was ascertained using electrophoretic mobility shift assay and immunohistochemistry. We also tested for markers of proliferation, angiogenesis, and invasion using immunohistochemistry and Western blot analysis. Results. Rg3 significantly enhanced the efficacy of fractionated radiotherapy by improving the quality of life of mice. Moreover, tumors from mice xenografted with CT-26 cells and treated with combined Rg3 + radiotherapy showed significantly lower tumor volumes (P<0.01 versus controls; P<0.05 versus radiation alone), NF-κB activation, and expression of NF-κB-regulated gene products (cyclin D1, survivin, cyclooxygenase-2 (COX-2), and vascular endothelial growth factor (VEGF)) compared with controls. The combination treatment was also effective in suppressing angiogenesis, as indicated by lower CD31+ microvessel density compared with controls (P<0.05). Conclusion. Our results suggest that Rg3 enhances the antitumor effects of radiotherapy for colorectal cancer by suppressing NF-κB and NF-κB-regulated gene products, leading to inhibition of tumors and prolongation of the lifespan of CT-26 xenograft BALB/c mice.

scholarly journals Developing a Comprehensive Model for Improving Quality of Life in Individuals with Alzheimer Disease and Related Dementia and Their Informal Caregivers: Qualitative Study of AZL Forum Data

Iproceedings ◽  
10.2196/16230 ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. e16230
Author(s):  
Yan Du ◽  
Brittney Lewis ◽  
Katrina Lopez ◽  
Chengdong Li ◽  
Carole White ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Alzheimer Disease ◽  
Peer Interactions ◽  
Living Arrangement ◽  
Informal Caregivers ◽  
Comprehensive Model ◽  
Improve Quality ◽  
Online Forum

Background It is estimated that more than five million Americans are living with Alzheimer disease and related dementia (ADRD), and the population of people living with the disease is expected to triple by 2060. Most care for persons living with ADRD is provided by informal caregivers. However, current strategies to improve the quality of life for both people living with ADRD and their informal caregivers are not optimal, especially from a comprehensive approach. Social media and online forums have become increasingly popular tools for ADRD caregivers to manage the burden of caregiving. Objective This study was to 1) explore informal caregivers’ discussion topics by analyzing the caregiver online forum data, and 2) develop a comprehensive model based on their discussion topics, with the aim to improve quality of life for both persons living with ADRD and their informal caregivers. Methods Publicly available peer interactions of 4102 registered users, with 96% self-claimed as informal caregivers (67% as a child of a person with dementia, 13% as a partner/spouse, and 7% as a relative) on the Alzheimer’s Association ALZ Connected Caregivers Forum were extracted in January 2019 using computer programming. A total of 40,798 postings were collected. All authors agreed to use a triangular model to serve as the predetermined three major themes to categorize all codes. The three major themes were factors of caregivers, factors of individuals with ADRD, and factors of care context. Inductive coding was used to derive in vivo codes from the data, and the codes were further refined throughout the coding process. Two researchers independently coded postings until saturation was reached. Discrepancies were discussed among the two researchers to reach consensus. A third senior researcher’s opinion was referred to whenever necessary. Results For factors of caregivers, the most frequent subthemes were perceived caregiver burden, caregiver’s life balance, caregiving strategies, communication, expectations, personal health issues, poor relationship, and ineffective coping. Subthemes of factors of individuals with ADRD included changes in abilities and capacities, commodities, behaviors, health conditions, daily living function, disengagement, and ineffective coping. Lastly, for factors of care context, the most frequent themes were family support, financial support, informational support, professional support, length of care provided, living arrangement, activities and stimulation, patient health care coordination, unexpected situations, communication, and physical environment. One theme under one of the triangular factors may influence another theme under another triangular factor and vice versa. Conclusions By analyzing the discussions of informal caregivers on ALZ online forum, we found that taking care of a loved one with ADRD is challenging for informal caregivers. The challenges may affect the quality of life for both caregivers and the caregiver recipients; factors of care recipients, caregivers, and the care context interactively affect perceived challenges of caregivers. This study has identified a comprehensive model which may be used to help improve quality of life for both informal caregivers and people living with ADRD. Our next step is to use these manually determined codes to analyze all extracted postings via machine learning to improve this model.

scholarly journals Mechanical Examination of Chicken Vessel with Custom-Built Experimental Equipment

2021 ◽  
Vol 15 (1) ◽  
pp. 76-79
Author(s):  
Ádám Meisel ◽  
K. Brigitta Tóth ◽  
Éva Lakatos
Keyword(s):  
Quality Of Life ◽  
Blood Vessels ◽  
Input Data ◽  
Mechanical Characteristics ◽  
Numerical Models ◽  
Tensile Tests ◽  
Experimental Equipment ◽  
Chicken Blood

Abstract Cardiovascular disease has been decimating humanity for decades. In vivo examination of blood vessels is of great help in the development of numerical models and simulations that can help physicians significantly improve sufferers’ quality of life. For such models, the different mechanical characteristics of the vessels are the input data. Several such mechanical properties of the vessels, such as modulus of elasticity and tensile strength, are determined by a tensile test. In the course of our research, an experimental device was developed and tested which is suitable for biaxial tensile tests of blood vessels, which we present through the examination of chicken blood vessels.

scholarly journals Retraining in a Female Elite Rower with Persistent Symptoms Post-Arthroscopy for Femoroacetabular Impingement Syndrome: A Proof-of-Concept Case Report

2019 ◽  
Vol 4 (2) ◽  
pp. 24 ◽  
Author(s):  
Sarah Mottram ◽  
Martin Warner ◽  
Nadine Booysen ◽  
Katie Bahain-Steenman ◽  
Maria Stokes
Keyword(s):  
Quality Of Life ◽  
Case Report ◽  
Physical Therapy ◽  
Movement Control ◽  
Control Test ◽  
Proof Of Concept ◽  
Elite Rower ◽  
Femoroacetabular Impingement Syndrome ◽  
Hip Flexion

Athletes with femoroacetabular impingement syndrome (FAIS) managed arthroscopically do not always return to sport. Inability to control back/pelvis, hip and lower limb movements may contribute to the onset and recurrence of symptoms. Our hypothesis is that results from a battery of cognitive movement control tests can inform a cognitive movement control (neuromuscular) retraining programme for improving the clinical presentation and quality of life in an athlete with FAIS. This case report presents a female elite rower with persistent left-sided anterior hip pain, four years post-arthroscopic surgery for FAIS, whose symptoms failed to respond to conventional physical therapy. Hip and groin outcome score (HAGOS), passive and active hip flexion range of motion (ROM) workload (time training on water), hip and pelvic kinematics (3-D motion analysis) and electromyography during a seated hip flexion movement control test, and a movement control test battery to identify movement control impairments (The Foundation Matrix), were assessed pre-intervention (week 0) and immediately post-intervention (week 16). Impaired movement control was targeted in a tailored 16-week cognitive movement control retraining exercise program. All measures improved: HAGOS (all 6 sub-scales); symptoms (61/100 pre-training to 96/100 post-training); physical activities participation (13/100 to 75/100); and active hip flexion ROM increased (78 to 116 and 98 to 118 degrees, respectively); workload increased from 4 to 18 h/week; and movement control impairment reduced (25/50 to 9/50). Pelvic motion on kinematic analysis were altered, and delayed activation onset of tensor fascia latae and rectus femoris muscles reduced. This proof-of-concept case report supports the hypothesis that cognitive movement control tests can inform a targeted cognitive movement control retraining program to improve symptoms, function and quality of life, in an elite rower with persistent hip pain. This training offers an alternative approach to conventional physical therapy, which has failed to restore function in FAIS, and the present study illustrates how specific cognitive movement control assessment can direct individual training programmes.

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