Anti Glomerulo Basement Membrane(Gbm),Phadia

An anti-GBM antibody test is urgently advised if you have rapidly worsening kidney function, blood or protein in the urine, reduced urine output, or coughing up blood with breathlessness. It is also recommended when a kidney biopsy shows crescentic glomerulonephritis, alongside ANCA testing, and for monitoring treatment. These symptoms need emergency care.

No special preparation or fasting is required for an anti-GBM antibody test. Since it is often an urgent test, don’t delay testing. Inform your doctor about any plasma exchange, steroids, or immunosuppressants you have received, as these can lower antibody levels. Bring previous kidney function and urine test reports.

No, fasting is not required for an anti-GBM antibody test. You can eat and drink normally before giving your sample, and the test can be done at any time of day. Since it is often urgent, don’t delay testing to fast. Inform your doctor about any plasma exchange or immunosuppressive treatment.