A study by the Lancet, a leading medical journal, has looked at the link between flights and health, and in particular the dangers of venous thromboembolism (VTE), where a blood clot forms in a vein, often in the legs, and then moves to the lungs.
A team led by Hugo Guterman, a robotics expert, has built a prototype device that uses ultrasound, machine vision and a robotic needle-dispenser to make placing a central venous catheter a push-button affair.The operator lays the wireless device on a patient's arm, leg or neck and views an ultrasound image on a nearby computer screen.
A study in 2013 by Stanford University School of Medicine and Lucile Packard Children's Hospital, found that over half the attempts to place a central venous catheter in children failed on the first go.In this section Sky-Fi To the point ReprintsPortable ultrasound can be used to produce an image of the position of blood vessels to help insert needles.
I do like to drink two or three cups of tea, and the odd cup of coffee, every day, so I was quite pleased to discover this result.I was also interested to discover that I have a normal risk for venous thrombosis when taking birth-control pills.
Sadly, their fears are occasionally well founded.Central venous catheters, or central lines, are commonly used with critically ill patients to administer drugs, fluids, food or blood products close to the heart.
Hemorrhage results in a diminished return of venous blood to the heart, the output of which therefore falls, causing a lowering of the arterial blood pressure.
These events have no measurable effect on carbon dioxide partial pressures because the difference between arterial and venous blood is so small.
Along this route the venous blood is warmed by the arterial blood and arrives at the heart warm.
The arterial blood, having transferred its heat into the venous blood rather than the environment, arrives precooled at the surface of the skin.
(The space between the lungs, the mediastinum, is bordered by the mediastinal pleura, a continuation of the membrane lining the chest. The superior vena cava is the principal channel for venous blood from the chest, arms, neck, and head).
