What is the difference between hemofiltration and hemodiafiltration?

Hemofiltration and Hemodiafiltration Hemofiltration (HF) is a technique based mainly on convection, whereas hemodiafiltration (HDF) combines convection and diffusion. Convection is the process during which solutes and solvent move according to the pressure gradient.

What is the difference between hemodialysis and hemodiafiltration?

Hemodiafiltration (HDF) is a form of renal replacement therapy that utilizes convective in combination with diffusive clearance, which is used in standard hemodialysis. Compared with standard hemodialysis, HDF removes more middle-molecular-weight solutes.

What is post-dilution in dialysis?

There are two general strategies for CVVH replacement solution entering into the blood circuit: pre-dilution (in which replacement solution is mixed with the blood prior to its entry into the filter), or post-dilution (in which replacement solution is mixed with the blood after it has passed through the filter).

What is HDF post-dilution?

In post-dilution HDF, the replacement fluid is infused downstream of the dialyser, usually into the venous bubble trap [8]. For solutes which can pass the membrane unimpeded (sieving coefficient = 1), the concentration in the ultrafiltrate is the same as in the plasma water.

When is hemodiafiltration used?

Hemofiltration, also haemofiltration, is a renal replacement therapy which is used in the intensive care setting. It is usually used to treat acute kidney injury (AKI), but may be of benefit in multiple organ dysfunction syndrome or sepsis.

What is the technique of hemodiafiltration?

Hemodiafiltration (HDF) is an extracorporeal renal-replacement technique using a highly permeable membrane, in which diffusion and convection are conveniently combined to enhance solute removal in a wide spectrum of molecular weights.

What are the principles of hemodiafiltration?

Abstract. Haemodiafiltration (HDF) is a renal replacement modality that combines diffusion and enhanced convection in order to remove small- and middle-molecular-weight compounds, respectively.

What is pre and post dilution in CRRT?

Predilution means that the replacement solution is returned to the blood before it reaches the filter, diluting the blood in the hollow fibers. Postdilution means that the replacement fluid is returned to the blood after the filter (but before the return side of the access catheter).

What is pre and post-dilution in CRRT?

What are benefits of hemodiafiltration?

Hemodiafiltration provides greater removal of higher molecular weight uremic retention solutes than conventional high-flux hemodialysis, and recently completed randomized, controlled clinical trials suggest better patient survival with online hemodiafiltration compared with standard high-flux hemodialysis when a high …

When is hemodiafiltration needed?

You need dialysis if your kidneys no longer remove enough wastes and fluid from your blood to keep you healthy. This usually happens when you have only 10 to 15 percent of your kidney function left. You may have symptoms such as nausea, vomiting, swelling and fatigue.