What is extravascular compression?

This is because the left coronaries run between the muscle fibers that make up the left ventricle. When these muscle fibers contract, they compress and, in some regions of the myocardium, collapse the coronary supply vessels through “extravascular compression.”

Which of the following is an extravascular fluid?

extracellular fluid The body fluid outside of cells. It includes the interstitial, intravascular, and cerebrospinal fluids. Water is the common solvent of all these fluids.

What is extra vascular tissue?

Definition of extravascular : not occurring or contained in body vessels extravascular tissue fluids.

What are the factors that affect the delivery of blood perfusion to the heart through the coronary arteries?

Regulation of coronary blood flow is understood to be dictated through multiple mechanisms including extravascular compressive forces (tissue pressure), coronary perfusion pressure, myogenic, local metabolic, endothelial as well as neural and hormonal influences.

What is a circumflex artery?

The circumflex artery branches off the left coronary artery and encircles the heart muscle. This artery supplies blood to the outer side and back of the heart.

What is myocardial perfusion pressure?

Myocardial perfusion pressure, defined as the aortic diastolic pressure minus the right atrial diastolic pressure, correlates with coronary blood flow during cardiopulmonary resuscitation (CPR) and predicts initial resuscitation success.

What is intra and extracellular fluid?

The intracellular fluid is the fluid contained within cells. The extracellular fluid—the fluid outside the cells—is divided into that found within the blood and that found outside the blood; the latter fluid is known as the interstitial fluid.

What is meant by extracellular fluid?

extracellular fluid, in biology, body fluid that is not contained in cells. It is found in blood, in lymph, in body cavities lined with serous (moisture-exuding) membrane, in the cavities and channels of the brain and spinal cord, and in muscular and other body tissues.

What is extravascular route?

extravascular route are usually characterised by the three. phases of absorption, distribution and elimination, although. for oral administration in tablet form there is an additional. pre-absorption phase involving dissolution of the tablet in. the stomach and transport to the site of absorption, the.

What is extravascular Drug Administration?

Extravascular administration refers to all routes of administration except those in which the drug is directly introduced into the bloodstream. Examples of extravascular routes are intramuscular (IM), subcutaneous (SC), peroral (PO), oral, rectal, intraperitoneal (IP), and topical.

What is nuclear medicine myocardial perfusion stress test?

Myocardial perfusion is an imaging test. It’s also called a nuclear stress test. It is done to show how well blood flows through the heart muscle. It also shows how well the heart muscle is pumping.

What phase of the cardiac cycle does coronary perfusion occur?

Because these vessels traverse the myocardium, myocardial contraction during systole compresses arterial branches and prevents perfusion. Therefore, coronary perfusion occurs during diastole rather than systole.

Where is the circumflex?

What is LCX heart?

The “LCX”, or left circumflex artery (or circumflex artery, or circumflex branch of the left coronary artery) is an artery of the heart. Circumflex branch of left coronary artery. Base and diaphragmatic surface of heart. (Circumflex branch not visible, but would be near the coronary sinus.)

What is CPP in CPR?

16–18 Coronary perfusion pressure (CPP, the difference between aor- tic diastolic and right atrial diastolic pressure during the relax- ation phase of chest compressions) is the primary determinant of myocardial blood flow during CPR.

What is the difference between intra and extracellular?

Intracellular fluid and extracellular fluid collectively make up total body fluids. Intracellular fluid is found inside the cell membrane and extracellular fluid is found outside the cell membrane. Cell membrane act as the margin of each fluid.

What is intracellular and extracellular?

What is intravascular fluid?

Intravascular fluid is whole blood volume and also includes red blood cells, white blood cells, plasma, and platelets. Intravascular fluid is the most important component of the body’s overall fluid balance.

What is extravascular administration in pharmacokinetics?

What is extravascular administration in pharmacology?

“Drug administration by any other route than the intravenous route”

What is intravascular administration?

An intravascular administration set is a device used to administer fluids from a container to a patient’s vascular system through a needle or catheter inserted into a vein. The device may include the needle or catheter, tubing, a flow regulator, a drip chamber, an infusion line filter, an I.V.

What is the major advantage of intravenous administration over extravascular drug absorption?

The major advantage of intravenous administration compared to extravascular drug absorption is that the rate and extent of systemic drug input are carefully controlled.

What is gamma camera in radiography?

The gamma camera, also called ascintillation camera orAnger camera, is an imaging device used to image gamma radiation–emitting radioisotopes. This technique is known as scintigraphy and is used to image and analyze the distribution of gamma-emitting radionuclides medically introduced into the human body.

What is the meaning of extravascular?

Related to extravascular: extravascular fluid extravascular [ek″strah-vas´ku-ler] situated or occurring outside a vessel or the vessels. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc.

What is the role of the extravascular dose in pharmacokinetics?

The extravascular dose must be adapted to the bioavailability and sometimes to the absorption rate of the drug. Variation of the rate of absorption and bioavailability can add to the global pharmacokinetic variability, particularly in patients with diseases affecting the absorption site (e.g. affections of the gastro-intestinal tract).

What drives coagulation in the extravascular space?

The principal drivers of coagulation in the extravascular space are TF and collagen.13–15 TF binds and allosterically activates factor VIIa to generate sufficient factor Xa for a small amount of thrombin to be formed ( Fig. 127.1 ).

What is extravascular hemoglobinuria?

extravascular (ĕk′strə-văs′kyə-lər) adj. 1. Located or occurring outside a blood or lymph vessel. 2. Lacking vessels; nonvascular. The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. hemoglobinuria