How are hydrostatic pressure and oncotic pressure related to edema?

Edema occurs when there is a decrease in plasma oncotic pressure, an increase in hydrostatic pressure, an increase in capillary permeability, or a combination of these factors. Edema also can be present when lymphatic flow is obstructed.

Is oncotic pressure the same as osmotic pressure?

Oncotic pressure is defined as the osmotic pressure exerted by colloids in solution, so the terms COP and oncotic pressure can be used interchangeably; colloid oncotic pressure, a commonly used misnomer, is redundant. Osmolality is the concentration of osmotically active particles (solute) per kilogram of solution.

What is meant by oncotic pressure?

Oncotic pressure, or colloid osmotic-pressure, is a form of osmotic pressure induced by the proteins, notably albumin, in a blood vessel’s plasma (blood/liquid) that displaces water molecules, thus creating a relative water molecule deficit with water molecules moving back into the circulatory system within the lower …

What happens when hydrostatic pressure increases?

Increased hydrostatic pressure leading to pulmonary edema may result from many causes, including excessive intravascular volume administration, pulmonary venous outflow obstruction (eg, mitral stenosis or left atrial [LA] myxoma), and LV failure secondary to systolic or diastolic dysfunction of the left ventricle.

What happens when hydrostatic pressure is too high?

A variety of clinical conditions are associated with increased hydrostatic pressures in the Pmv, either as the result of elevation of vascular pressures distal to the lung’s parenchyma, increased blood flow, increased blood volume, or PA or venular hypertension.

What contributes to oncotic pressure?

The oncotic pressure of the interstitial fluid depends on the interstitial protein concentration and the reflection coefficient of the capillary wall. The more permeable the capillary barrier is to proteins, the higher the interstitial oncotic pressure.

How do you calculate hydrostatic pressure?

Hydrostatic pressure can be computed by multiplying the density of the fluid by the acceleration due to gravity and the depth. In symbols, P = pgh. where P is the hydrostatic pressure, p (rho) is the density of the liquid, g is the acceleration due to gravity and h is the height from the surface or the depth.

What increases hydrostatic pressure?

Increased elevation increases the amount of hydrostatic pressure. Fluid flowing downward gains increased pressure as well, which causes water traveling over waterfalls to flow faster than water running down the stream to the fall. Temperature is another factor that affects pressure because when temperatures increase,…

How do you calculate hydrostatic force?

Hydrostatic force is the product of pressure and area. Expressed mathematically, the equation is F = P x a. The balancing or offsetting of hydrostatic force is achieved by exposing opposing areas to the same pressure.

What is net hydrostatic pressure?

The net hydrostatic pressure is the total hydrostatic pressure,this pressure is equal to the blood pressure, so the blood is pumping out.And also it is greatest going out closer to the arterioles.