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Related Concept Videos

Accelerators01:17

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Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
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The importance of understanding acceleration spans our day-to-day experiences, as well as the vast reaches of outer space and the tiny world of subatomic physics. In everyday conversation, to accelerate means to speed up. For instance, we are familiar with the acceleration of our car; the harder we apply our foot to the gas pedal, the faster we accelerate. The greater the acceleration, the greater the change in velocity over a given time. Acceleration is widely seen in experimental physics. In...
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Acceleration is in the direction of the change in velocity, but it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion. Although commonly referred to as deceleration, this causes confusion in our analysis as deceleration is not a vector, and does not point to a specific direction with respect to a coordinate system. Therefore, the term deceleration is not used. For example, when a subway train slows down, it...
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When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
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Related Experiment Video

Updated: Feb 14, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
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Accelerated ambulation after vascular access closure device.

Daniel Brancheau1, Sinan Sarsam2, Mahmoud Assaad2

  • 1St. John-Providence Hospital and Medical Center, Department of Internal Medicine, Division of Cardiology, 16001 West 9 Mile Road, Southfield, MI 48075-4818, USA.

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PubMed
Summary
This summary is machine-generated.

Early ambulation 20 minutes after Angioseal® device deployment for arteriotomy closure appears safe for patients undergoing diagnostic cardiac catheterization. This study found no complications, suggesting a potential shift from prolonged bed rest to earlier patient mobility.

Keywords:
AngiogramAngiosealambulationvascular closure device

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Area of Science:

  • Cardiovascular Interventions
  • Vascular Access Management
  • Patient Recovery Protocols

Background:

  • Standard practice often involves prolonged bed rest (2-3 hours) after Angioseal® device deployment for arteriotomy closure.
  • Current guidelines permit ambulation as early as 20 minutes post-deployment.

Purpose of the Study:

  • To prospectively evaluate the safety and feasibility of early patient ambulation (20 minutes) after Angioseal® device use.
  • To compare early ambulation versus conventional prolonged bed rest protocols.

Main Methods:

  • Prospective study enrolling patients undergoing angiography via common femoral artery approach.
  • Inclusion criteria: use of a 6 Fr Angioseal® closure device for arteriotomy closure.

Main Results:

  • Twenty-nine patients were enrolled; 93.1% ambulated at 20 minutes.
  • No hemorrhage or groin complications were observed in any patient.
  • Observed early ambulation times ranged from 20 to 28 minutes.

Conclusions:

  • Early ambulation 20 minutes after 6 Fr Angioseal® device deployment is likely safe for patients undergoing diagnostic cardiac catheterization.
  • Findings suggest a potential to shorten recovery times and improve patient throughput.