scholarly journals 22 Flow and Pressure Differential Results of a Novel Low-Cost Portable Negative Pressure Patient Enclosure For COVID-19

2021 ◽  
Vol 78 (2) ◽  
pp. S11
Author(s):  
P. Moschella ◽  
B. Roth ◽  
A. LeMatty ◽  
R. Falconer ◽  
E.S. Mousavi ◽  
...  
Keyword(s):  
Negative Pressure ◽  
Low Cost ◽  
Pressure Differential

scholarly journals Negative Pressure Provides Simple and Stable Droplet Generation in a Flow-Focusing Microfluidic Device

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 662
Author(s):  
Nikita A. Filatov ◽  
Anatoly A. Evstrapov ◽  
Anton S. Bukatin
Keyword(s):  
Microfluidic Device ◽  
Negative Pressure ◽  
Low Cost ◽  
Control Valve ◽  
Droplet Microfluidics ◽  
Droplet Generation ◽  
Electric Signal ◽  
Absolute Pressure ◽  
Flow Focusing ◽  
Wide Range

Droplet microfluidics is an extremely useful and powerful tool for industrial, environmental, and biotechnological applications, due to advantages such as the small volume of reagents required, ultrahigh-throughput, precise control, and independent manipulations of each droplet. For the generation of monodisperse water-in-oil droplets, usually T-junction and flow-focusing microfluidic devices connected to syringe pumps or pressure controllers are used. Here, we investigated droplet-generation regimes in a flow-focusing microfluidic device induced by the negative pressure in the outlet reservoir, generated by a low-cost mini diaphragm vacuum pump. During the study, we compared two ways of adjusting the negative pressure using a compact electro-pneumatic regulator and a manual airflow control valve. The results showed that both types of regulators are suitable for the stable generation of monodisperse droplets for at least 4 h, with variations in diameter less than 1 µm. Droplet diameters at high levels of negative pressure were mainly determined by the hydrodynamic resistances of the inlet microchannels, although the absolute pressure value defined the generation frequency; however, the electro-pneumatic regulator is preferable and convenient for the accurate control of the pressure by an external electric signal, providing more stable pressure, and a wide range of droplet diameters and generation frequencies. The method of droplet generation suggested here is a simple, stable, reliable, and portable way of high-throughput production of relatively large volumes of monodisperse emulsions for biomedical applications.

scholarly journals Low Cost Negative Pressure Wound Healing Device System

2017 ◽  
Vol 14 (2) ◽  
pp. 56-60
Author(s):  
Tian-Swee Tan ◽  
Kee-Gang Ng ◽  
Kasim Johari ◽  
Kah-Meng Leong ◽  
Zaharil Arman ◽  
...  
Keyword(s):  
Wound Healing ◽  
Negative Pressure ◽  
Low Cost

scholarly journals An autonomous economical and efficient ureteroscopic irrigation system

2020 ◽  
Author(s):  
Tengteng Wang ◽  
Xiude Chen ◽  
Qinghua Xia ◽  
Qi Zhang ◽  
Xunbo Jin
Keyword(s):  
Negative Pressure ◽  
Raw Materials ◽  
Irrigation System ◽  
Low Cost ◽  
Cost Effective ◽  
Effective Control ◽  
Flexible Ureteroscopy ◽  
Invasive Technique ◽  
Treatment Practice ◽  
Extension Tube

Abstract Background In recent years, the minimally invasive technique for treating nephrolithiasis has been developed rapidly. Particularly, the flexible ureteroscopy has been extensively applied. For flexible ureteroscopy lithotripsy, the perfusion equipment is necessary to ensure a clear intraoperative field of view. This study was aimed to prepare a set of economical and efficient ureteroscopic irrigation system by some commonly used devices in clinical diagnosis and treatment practice. Methods In this study, according to requirements of the endoscopic surgery, the infusion apparatus, infusion apparatus extension tube, three-way plug valve, Luer one-way valve, ordinary syringe, and negative pressure spring were used to assemble the irrigation system with different functions. Results The autonomous perfusion device realized the real-time conversion of manual injection, continuous perfusion or negative pressure suction. The entire equipment has many advantages, including easily accessible raw materials, low cost, simple assembly process, easy operation, strong controllability, effective control ability for the intrarenal pressure, and high safety. Conclusions The commonly used medical devices were applied to assemble the autonomous ureteroscopic irrigation system, which is flexible, simple and cost-effective and thus can be applied in flexible ureteroscopic surgery.

scholarly journals A A simple and low-cost technique of creating a Negative Pressure Wound Therapy (NPWT) machine on the example of a severe phlegmon of lower limb in lower socio-economic area.

2018 ◽  
Vol 5 (1) ◽  
pp. 12-14
Author(s):  
Marcin Kiszka ◽  
Filip Kazubski ◽  
Magdalena Maj ◽  
Tomasz Banasiewicz
Keyword(s):  
Negative Pressure ◽  
Wound Closure ◽  
Negative Pressure Wound Therapy ◽  
Low Cost ◽  
Hiv Positive ◽  
Wound Therapy ◽  
Economic Area ◽  
Stay Time ◽  
Post Traumatic ◽  
The Cost

The Negative Pressure Wound Therapy (NPWT) is an approved method of healing lower extremity ulcers of various origin, accelerating the wound closure process, thus decreasing the hospital-stay time and lowering the cost of the treatment. Although it is scarcely needed in developing countries such as Kenya, there is a lack of official supplier of the NPWT equipment. We present an improvised method of constructing a reliable and effective NPWT dressing form widely available tools in a case of treating a post-traumatic phlegmon in a HIV-positive patient.

Design of Low cost Negative Pressure Wound Therapy

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
M. Kalayarasan ◽  
S. Mohanraj ◽  
T. Dineshmurugan ◽  
R. Sruthi ◽  
A. Naveen
Keyword(s):  
Negative Pressure ◽  
Negative Pressure Wound Therapy ◽  
Low Cost ◽  
Wound Therapy

scholarly journals Low-cost Negative-pressure Wound Therapy Using Wall Vacuum

2015 ◽  
Vol 3 (6) ◽  
pp. e418 ◽  
Author(s):  
Benoit Chaput ◽  
Ignacio Garrido ◽  
Harold Eburdery ◽  
Jean Louis Grolleau ◽  
Jean Pierre Chavoin
Keyword(s):  
Negative Pressure ◽  
Negative Pressure Wound Therapy ◽  
Low Cost ◽  
Wound Therapy

scholarly journals Investigating the effect of materials and structures for negative pressure ventilators suitable for pandemic situation

2021 ◽  
Author(s):  
Nada Abughanam ◽  
Shahd Sameer Mohammed Gaben ◽  
Muhammad E. H. Chowdhury ◽  
Amith Khandakar
Keyword(s):  
Negative Pressure ◽  
Virus Disease ◽  
Low Cost ◽  
Cost Effective ◽  
Positive Pressure ◽  
Mechanical Ventilators ◽  
Lower Health ◽  
Simulation Results ◽  
Health Complications ◽  
The Cost

AbstractThe onset of the corona virus disease 2019 (COVID-19) pandemic caused shortages in mechanical ventilators (MVs) essential for the intensive care unit (ICU) in the hospitals. The increasing crisis prompted the investigation of ventilators which is low cost and offers lower health complications. Many researchers are revisiting the use of negative pressure ventilators (NPVs), due to the cost and complications of positive pressure ventilators (PPVs). This paper summarizes the evolution of the MVs, highlighting the limitations of popular positive and negative pressure ventilators and how NPV can be a cost-effective and lower health complication solution. This paper also provides a detailed investigation of the structure and material for the patient enclosure that can be used for a cost-effective NPV system using ANSYS simulations. The simulation results can confirm the selection and also help in developing a low cost while based on readily available materials. This can help the manufacturer to develop low-cost NPV and reduce the pressure on the healthcare system for any pandemic situation similar to COVID-19.

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