Intra-compartmental Pressure
Intra-compartmental Pressure - Related Videos
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
02:34
Vapor Pressure
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2020
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
03:28
Vapor Pressure Lowering
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2020
The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates: Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution. The presence of...
08:14
Ammonia Synthesis at Low Pressure
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Cited by 17 •
2017
Ammonia can be synthesized at low pressure by using a conventional catalyst and an ammonia selective absorbent.
03:02
Constant Pressure Calorimetry
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2020
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
FAQs
As pressure increases inside the compartment, venous drainage becomes restricted first. Continued elevation then reduces the arteriovenous pressure gradient, the pressure difference that supports capillary and arterial blood flow. This progression can limit oxygen delivery to enclosed tissues, placing muscle and nerves at risk of ischemia and potentially causing irreversible injury if the process continues.
The pressure rise initially interferes with venous drainage, so blood cannot leave the compartment normally. As pressure continues to increase, the arteriovenous gradient falls, reducing the force available for capillary and arterial flow. This sequence explains why a volume increase can progress from impaired drainage to inadequate tissue perfusion within the same enclosed space.
Bleeding, edema, and other increases in compartment volume can raise the pressure. Because the muscle compartment is enclosed by fascia, added contents cannot expand freely, so the pressure change can become clinically significant. The resulting mechanical effect is not limited to one tissue type: both muscle and nerves may be threatened when perfusion falls.
Clinicians measure it when acute compartment syndrome is suspected, particularly in patients whose risk follows trauma or surgery. The measurement is interpreted alongside physical findings rather than in isolation. Used in that context, it helps evaluate whether pressure elevation may be contributing to threatened tissue perfusion and whether urgent clinical attention is needed.
The measurement provides pressure information that complements the patient’s physical findings. This combination helps clinicians evaluate suspected acute compartment syndrome and recognize pressure elevation in situations where muscle or nerve perfusion may be threatened. It can also contribute to monitoring in high-risk patients, allowing the clinical team to follow a potentially evolving problem more closely.
Timely recognition matters because sustained reduction in tissue perfusion can produce muscle and nerve ischemia, with the possibility of irreversible tissue injury. In suspected acute compartment syndrome, pressure assessment and physical findings help identify the problem early enough to support urgent treatment. The same principle makes surveillance important for patients considered at high risk after trauma or surgery.