[Blood protein-volume indicators in massive plasmapheresis]

Area of Science:

• Rheumatology
• Clinical Chemistry

Background:

• Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by systemic inflammation.
• Hyperproteinemia can occur in RA patients, potentially impacting treatment efficacy.
• Plasmapheresis is a therapeutic apheresis technique used in managing certain autoimmune conditions.

Purpose of the Study:

• To investigate changes in hyperproteinemia following plasmapheresis in RA patients.
• To develop predictive mathematical models for protein concentration changes post-plasmapheresis.
• To evaluate the accuracy of these models under different procedural regimens.

Main Methods:

• Studied hyperproteinemia values before and after plasmapheresis in 32 RA patients.
• Proposed mathematical linear regression patterns for 3 plasmapheresis regimens.
• Regimens involved removing 0.5 or 1.0 volume of circulating plasma, with substitution using rheopolyglucin or albumin.
• Validated model adequacy using an independent examination sample of 15 patients.

Main Results:

• Developed mathematical patterns to predict protein concentration changes.
• Model predictions were based on plasma removal volume and substitution fluid type.
• Independent data validation confirmed the adequacy of the linear regression patterns.
• Demonstrated predictability of protein level fluctuations post-plasmapheresis.

Conclusions:

• Mathematical models can accurately predict protein concentration changes after plasmapheresis in RA patients.
• The proposed models offer a tool for optimizing plasmapheresis regimens.
• Understanding these protein dynamics is crucial for managing RA patients undergoing apheresis.