Home oxygen therapy has been classically based on the use of compressed oxygen cylinders and portable oxygen (O(2)) concentrators. In the last few years, we have witnessed the advent of portable oxygen therapy equipment and liquid oxygen systems and even more recently portable O(2) concentrators. This equipment allows for greater patient mobility, which generates new issues that we must underst...

in this paper, a thermoelasticity solution for steady state response of thick cylinders which are subjected to pressure and external heat flux in inner surface is presented. displacement field obeys the kinematics of the first order shear deformation theory (fsdt). it is assumed that the temperature varies both along the length and the thickness. the variation of the temperature occurs linearly...

Vesicle cylinders are vertical pipes filled with bubbles and residual melt that differentiate from diktytaxitic basalt flows during crystallization. They grow from about 0.25 m above the base of the flow to the bottom of the chilled flow top. Field relations limit their growth to the period between cessation of lava movement and deep penetration of columnar joints. Basalts containing vesicle cy...

BACKGROUND Portable oxygen concentrators (POCs) typically include pulse flow (PF) modes to conserve oxygen. The primary aims of this study were to develop a predictive in vitro model for inhaled oxygen delivery using a set of realistic airway replicas, and to compare PF for a commercial POC with steady flow (SF) from a compressed oxygen cylinder. METHODS Experiments were carried out using a s...

STUDY OBJECTIVES To compare, in clinical conditions, the efficacy of refilled oxygen cylinders (O2-HFs) in improving oxygenation and exercise capacity of patients with COPD during a 6-min walking test. DESIGN Prospective randomized study with a cross-over design. SETTING A university teaching hospital. PATIENTS Ten patients with COPD, in a stable state and previously treated with long-ter...

The oxygen concentrator is an accepted means of delivery of long term domiciliary oxygen treatment. Conditions of use, however, need to be carefully defined. Fourteen concentrators were used for one year by patients with hypoxaemic chronic obstructive airways disease, and mechanical reliability, patient compliance with a regimen of 15 hours' use a day, smoking habits, and variation in arterial ...

The demand for quick and easy distribution of oxygen cylinders at Abepura Regional General Hospital (RSUD Abepura) is increasing. Every operator, nurse, patient desires quality in the hospital service process. This research explains how to build an automated time-saving transportation system facilitate medical services efficiently, environmentally friendly, safely. crucial due road conditions R...

It will now be widely known that contamination with a higher oxide of nitrogen occurred in a batch of nitrous oxide cylinders which were filled by the British Oxygen Company near the beginning of September 1966. When one considers the vast numbers of cylinders of nitrous oxide diat have been used during the last 40 years, contamination is obviously extremely rare; but, despite the care taken by...