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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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The vascular system comprises an extensive network of arteries, capillaries, and veins. The vascular system can be broadly divided into the blood and lymphatic systems. Typically, blood vessels can be categorized into three histological regions: tunica intima, tunica media, and tunica adventitia. The tunica intima consists of a single layer of endothelial cells attached to the basal lamina. Underlying the basal lamina is a connective tissue layer and an elastic lamina that gives stability and...
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Vascular resistance is a critical concept in understanding blood flow dynamics in the circulatory system. It refers to the resistance that blood encounters as it flows through the blood vessels. This resistance is a key factor in determining blood pressure and cardiac workload.
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The Bode plot is an essential tool in control system analysis, mapping the frequency response of a system through a magnitude plot and a phase plot, both against a logarithmic frequency axis. To construct a Bode plot, consider the transfer function H(ω):
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Creative Vascular Access Construction in Same Patient.

Pedro Pinto Sousa1, Paulo Almeida2, Pedro Sá Pinto2

  • 1Centro Hospitalar de Vila Nova de Gaia/Espinho, Portugal.

Revista Portuguesa De Cirurgia Cardio-Toracica E Vascular : Orgao Oficial Da Sociedade Portuguesa De Cirurgia Cardio-Toracica E Vascular
|April 28, 2018
PubMed
Summary
This summary is machine-generated.

Vascular access for dialysis patients requires creative solutions when initial attempts fail. This case highlights the successful use of a hybrid graft and early cannulation graft to restore hemodialysis access after multiple previous failures.

Area of Science:

  • Vascular Surgery
  • Nephrology
  • Dialysis Access

Background:

  • Maintaining functional vascular access (VA) is crucial for dialysis patient survival.

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  • Vascular access often requires maintenance or creation of new options, including autologous or synthetic methods.
  • Central venous catheters (CVCs) are associated with poorer dialysis quality and patient survival.