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Dialysis leukopenia and hypoxemia in a patient without measurable complement activity
La Ricerca in Clinica E in Laboratorio
|October 1, 1985
Summary
Hemodialysis with cuprophan membranes caused significant leukopenia and hypoxemia in a patient with hereditary angioedema. Complement activation was not the cause, suggesting alternative mechanisms for these adverse dialysis reactions.
Area of Science:
- Nephrology
- Immunology
- Hematology
Background:
- Hereditary angioedema (HAE) and C3NeF-positive chronic membranoproliferative glomerulonephritis (MPGN) are complex conditions.
- Cuprophan membranes are commonly used in hemodialysis.
Observation:
- A patient with HAE and C3NeF-positive MPGN underwent hemodialysis using cuprophan membranes.
- Key parameters including complement activity, leukocyte counts, PO2, and acid-base balance were monitored before, during, and after the procedure.
- In vitro studies were conducted to assess complement activation potential.
Findings:
- The patient exhibited profound leukopenia and hypoxemia within 20 minutes of initiating hemodialysis.
- Plasma complement activity remained undetectable, with no C3-conversion observed throughout the procedure.
- In vitro experiments confirmed that the patient's C3 could not be activated by cuprophan or zymosan, even under optimal conditions.
Implications:
- Complement activation is not the sole mechanism responsible for early leukopenia and hypoxemia during hemodialysis with cuprophan membranes.
- These findings suggest alternative pathways may contribute to adverse reactions during dialysis.
- Further research is needed to elucidate the precise mechanisms underlying hemodialysis-induced complications in patients with specific immune profiles.