Iodinated Contrast Adsorption in Cartridges With Styrene-Divinylbenzene Sorbent.

Area of Science:

• Nephrology
• Biomaterials Science
• Medical Device Engineering

Background:

• Contrast-associated acute kidney injury (CA-AKI) is a significant complication for patients with chronic kidney disease undergoing cardiac procedures.
• Iodinated contrast media used in these procedures are a primary cause of CA-AKI.
• Hemoadsorption, utilizing sorbent resin cartridges, is an emerging extracorporeal technique for blood purification.

Purpose of the Study:

• To evaluate the adsorptive kinetics of iodinated contrast medium (iohexol) using a scaled model of the HA380 hemoadsorption cartridge.
• To determine the efficiency of this cartridge in removing iohexol from blood in an in vitro setting.

Main Methods:

• An in vitro experimental study using a closed-loop extracorporeal circuit.
• A solution containing iohexol was recirculated through a 1:3 scale model of the HA380 cartridge for 60 minutes.
• Iohexol levels and clearance rates were measured at various time points.

Main Results:

• The cartridge achieved a 53% reduction in iohexol concentration after 60 minutes.
• Initial iohexol clearance was high (approx. 46.7 mL/min), decreasing over time.
• The adsorbate-to-sorbent ratio reached 155 mg/g.

Conclusions:

• A 1:3 scale HA380 cartridge model demonstrates efficient removal of iodinated contrast in an in vitro circuit.
• These findings support further investigation of hemoadsorption as a strategy to prevent or mitigate CA-AKI in clinical trials.