Venous Air Trap
Venous Air Trap - Related Videos
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A protocol for launching and stably trapping selected dielectric microparticles in air is presented.
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Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...
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Dean-Stark Trap
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2023
Source: Vy M. Dong and Jan Riedel, Department of Chemistry, University of California, Irvine, CA A Dean-Stark trap is a special piece of glassware, which allows the collection of water during a reaction through an azeotropic distillation. The desire to collect water from a reaction can have various reasons. It can drive the equilibria in reactions, where water is formed as a byproduct. According to Le Chatelier's principle, a change in temperature, pressure, concentration, or volume will cause...
FAQs
An expanded chamber slows the blood stream enough for buoyant air to separate from the blood and rise upward. This creates a distinct collection space rather than leaving bubbles distributed through the moving fluid. Once separated, the gas can be held by a filter or removed through a vent while the circuit continues processing blood.
The filter and vent provide two different ways to manage separated gas. A filter retains collected air within the trap, whereas a vent allows it to be evacuated from the circuit. Their function complements the chamber: separation occurs through flow slowing and buoyancy, while retention or evacuation prevents the gas from continuing with the blood.
Continuous bubble detection matters because air entry can occur while blood circulates through an extracorporeal system. Monitoring helps identify bubbles while the trap supports their removal, creating a safety layer beyond passive separation. In medicine, this combination is intended to reduce unintended air passage and the complications associated with air embolism.
Blood entering the trap moves through an expanded chamber where flow slows and buoyant air rises away from the liquid. The separated gas is then retained by a filter or evacuated through a vent. This sequence allows blood to remain in the venous or extracorporeal circuit while collected air is managed separately.
Venous air traps are used in hemodialysis, cardiopulmonary bypass, and other blood-processing procedures that circulate blood through an extracorporeal or venous pathway. These settings require attention to unintended air entry, so the device supports circuit safety by separating, retaining, or removing bubbles before they continue through the system.
Their safety value comes from addressing air within a blood circuit before it can pass onward. By combining flow slowing, buoyant separation, bubble detection, and gas retention or evacuation, venous air traps help reduce the risk of air embolism. This is particularly relevant when clinical procedures depend on continuous blood circulation outside or through a venous pathway.