Mechanical surface treatments have a long history in traditional engineering disciplines, such as the automotive or aerospace industries. Today, they are widely applied to metal components to increase the mechanical performance of these. However, their application in the medical field is rather rare. The present study aims to compare the potential of relevant mechanical surface treatments on th...

There is now ample evidence that hyperox(em)ia—that is, increased inspired oxygen concentrations (FIO2) and the subsequent rise in arterial oxygen tensions (PaO2)—coincides with aggravated mortality [1]. Most of the data originate from retrospective analyses, but a single-center trial showed that “conservative” PaO2 (70–100 mmHg) halved mortality when compared to “conventional” targets (≤ 150 m...

At work or in leisure activities, many people are exposed to vibration or mechanical shocks associated with risks of injury or disease. This paper identifies information that can be used to decide whether there may be a risk from exposure to hand-transmitted vibration or whole-body vibration and shock, and suggests actions that can control the risks. The complex and time-varying nature of human...

The frequency dependence of discomfort caused by vertical mechanical shocks has been investigated with 20 seated males exposed to upward and downward shocks at 13 fundamental frequencies (1-16 Hz) and 18 magnitudes (±0.12 to ±8.3 ms-2). The rate of growth of discomfort with increasing shock magnitude depended on the fundamental frequency of the shocks, so the frequency dependence of equivalent ...

Microhematuria is a common consequence of high-impact exercise such as running and jumping. In order to determine whether or not a similar hematuria accompanies mechanical shock exposure associated with small boat operations in the open ocean, urinary variables were measured in two boat crews (total N = 12) during a 2-day Mk V Special Operations Craft transit down the eastern coast of the Unite...

Experiments were conducted on an aqueous growth medium containing cultures of Escherichia coli (E. coli) XL1-Blue, to investigate, in a single experiment, the effect of two types of dynamic mechanical loading on cellular integrity. A bespoke shock tube was used to subject separate portions of a planktonic bacterial culture to two different loading sequences: (i) shock compression followed by ca...

Microhematuria is a common consequence of high-impact exercise such as running and jumping. In order to determine whether or not a similar hematuria accompanies mechanical shock exposure associated with small boat operations in the open ocean, urinary variables were measured in two boat crews (total N = 12) during a 2-day Mk V Special Operations Craft transit down the eastern coast of the Unite...

Pulmonary thromboembolism (PTE) is a life-threatening condition with a high early mortality rate caused by acute right ventricular failure and cardiogenic shock. We report a series of three patients who presented with acute and subacute submassive PTE. They were successfully treated by simple catheter-based mechanical thrombectomy and intrapulmonary arterial thrombolysis. Mechanical fragmentati...

A cryogenic shock tube has been developed as a tool for research in fluid mechanics and low-temperature physics. The shock tube was designed to operate with the test section immersed in a cryogenic liquid. A unique diaphragm-changing mechanism makes this shock tube an economical and practical device. There are several advantages in operating a shock tube at cryogenic temperatures. Shock waves o...