Workplace ergonomic assessment pada komunitas pekerja internet marketing society

Regular use of computers in the workspace contributes to suffering from many risk factors associated with musculoskeletal disorders (MSDs). Ergonomic principles is a determining factor of comfort and increased worker productivity at work. Ergonomics is also very important for workers who use computers. Working with computers is at high risk of suffering from a variety of complaints, including having the three biggest risk factors: back posture, repetition, and static strength. Preventive measures can minimize the negative impact of the main risks above. The purpose of this study is to assess and measure the ergonomics of the Internet Marketing Society's workplace workers. This service research uses observational methods from survey results with questionnaires distributed via google form. The total sampling is 33 workers from the Internet Marketing Society. The results show that 54.5% of workers do not know about ergonomics, 75.8% of workers do not use wrist and arm support devices. In the complaint problem, most of the workers experienced muscle pain 27.3% and back pain 24.2%, and 24.2% workers experienced shoulder conditions that were not relaxed while working. Based on these results, it is concluded that workers need to implement the principles of K3 and ergonomics in their work while working with computers.

Studying coefficient of increase of the support surface after deployment of a mobile hoist

Currently, there are about 150 manufacturers of mobile elevating work platforms (MEWP), which are constantly designing and implementing new machines with advanced capabilities. Along with the improvement of hoisting equipment, the support devices of the MEWP are also improved. Therefore, there is a need to investigate the coefficient of increase of the support surface area after the deployment of a mobile hoist for different types of support devices. Goal. The aim of this work is to study how the coefficient of increase of the support surface area after the deployment of the support device depends on the length of the support projecting for different designs of support devices used in MEWP. Methodology. Analytical methods of studying the designs with variable geometrical parameters were used in the work. To obtain the dependences of the coefficient of increase of the support surface area after the deployment of the support device on the length of the support projecting, the methods of mathematical modeling employing computer technology were used. Results. The analysis of the dependences of the coefficient of the support surface area increase after the deployment of the support device on the length of the support projecting showed that the use of the considered support devices enlarges the coefficient of increase of the support surface area from 1.9 with angular supports to 3.4 for Spider type support devices. Originality. It is proposed to consider the coefficient of increase of the support surface area, which enables to take into account the lengths and angles of the supports when determining the support surface area. Practical value. With the results of the study it is possible to choose the type of support device and its geometric parameters at the design stage which will

Development of Mechanical Circulatory Support Devices: 55 Years and Counting

Heart failure is a leading cause of morbidity and mortality in the United States. Treatment of this condition increasingly involves mechanical circulatory support devices. Even with optimal medical therapy and use of simple cardiac devices, heart failure often leads to reduced quality of life and a shortened life span, prompting exploration of more advanced treatment approaches. Left ventricular assist devices constitute an effective alternative to cardiac transplantation. These devices are not without complications, however, and their use requires careful cooperative management by the patient’s cardiology team and primary care provider. Left ventricular assist devices have undergone many technological advancements since they were first introduced, and they will continue to evolve. This article reviews the history of different types of left ventricular assist devices, appropriate patient selection, and common complications in order to increase health professionals’ familiarity with these treatment options.

EUTHANASIA AND ISLAMIC RULINGS PERTINENT TO MAINTAINING AND REMOVING ARTIFICIAL LIFE SUPPORT DEVICES

This paper is intended to elaborate on the legal ruling of removing life support from a brain-dead person. Brain death means the permanent absence of brainstem and cerebral functions, not only the death of the brain cortex. Life support devices restore the functions of the heart and respiratory system, which sometimes result in the full recovery of consciousness of the patient and all of his basic functions. It is possible for the patient to restore normal breathing and leave the hospital in a full healthy state. On this basis, it is not permissible for a doctor to remove these devices before the brainstem dies, otherwise this would cause a real and irreversible death of the patient. In this case, the doctor bears full civil and criminal responsibility. The doctor is held accountable if he refrains from providing assistance to this patient who is legally and medically alive. It is permissible to remove artificial life devices once the death of the brain is ascertained in the light of the above-mentioned diagnoses. Then, the patient will be transferred to another room, but his death is announced only after the heart stops functioning. It is from this moment that the rulings of death are applied. The responsibility of removing these devices and declaring death is the work of a specialized medical committee that approves the diagnosis and issues a burial permit.

The influence of surface roughness on the damage of von Willebrand Factor under shear flow condition

Despite technological advances in mechanical circulatory support devices to treat end-stage heart failure, blood damage induced by non-physiological shear stress in operation often triggered clinical hemocompatibility complications. The loss of high molecular weight von Willebrand Factor (HMW-VWF) has been considered as an essential cause of gastrointestinal bleeding. In addition to the mechanics factors, interface factors may also affect blood damage, especially the surface characteristics. In this study, the effect of surface roughness on VWF damage under flow condition was investigated. A roller pump circulation experimental platform with a roughness embedded sample chamber was constructed to provide blood shearing flow condition. VWF molecular weight analysis, VWF antigen (VWF-Ag) concentration assay, and VWF ristocetin cofactor activity (VWF-Rico) assay were performed on the sheared blood samples. These variables are the main functional indicators of VWF. It was found that the surface roughness induced VWF damage is mainly caused by the loss of HMW-VWF rather than reducing the total amount of VWF. The threshold value of surface roughness for a rapid increase in the degradation of HMW-VWF under low flow rate was obtained between Ra 0.4 and 0.6 μm, which was smaller than the threshold for hemolysis. Our findings indicated that VWF is more sensitive to the interface factor of surface roughness than red blood cells, thus has a higher requirement for blood pump design. It could provide reference for the material design and processing in developing mechanical circulatory support devices.

Current Landscape of Temporary Percutaneous Mechanical Circulatory Support Technology

Mechanical circulatory support devices provide hemodynamic support to patients who present with cardiogenic shock. These devices work using different mechanisms to provide univentricular or biventricular support. There is a growing body of evidence supporting use of these devices as a goal for cardiac recovery or as a bridge to definitive therapy, but definitive, well-powered studies are still needed. Mechanical circulatory support devices are increasingly used using shock team and protocols, which can help clinicians in decision making, balancing operator and institutional experience and expertise. The aim of this article is to review commercially available mechanical circulatory support devices, their profiles and mechanisms of action, and the evidence available regarding their use.