Intra-Renal Oliguria

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      Nephritic syndrome
          SLE
          Wegener's
          Goodpasture's
          Vasculitis
      Nephrotic syndrome
          SLE
          Amyloidosis
          IDDM
      Tubulointersitial
          ATN from HypoTN
        * Acute Inter Nephritis
          - Penicillin
          - NSAIDS
          - Diuretics
        * Chronic Intersitial
          - HTN
          - IDDM
          - Hypercalcemia
          - Uricemia
- ATN:
    - suspected when clinical history & exam allows exclusion of pre & post
          renal causes of ARF and may result from hypotension, recent crush
          injury, or exposure to nephrotoxins;
      - patient may show signs of volume overload because of excessive
          fluid adminstration at a time when renal function is comprimised;