Careful  observations  were  made  on  but  few  cases,  hence  the  above  figures  are
merely  suggestive.
Anuria  may  be  due  to  a  variety  of  causes,  which  may  be  grouped
as  obstructive,  reflex,  renal,  and  prerenal.     It  may  be  simply  a  nervous
•Deut.  Arch.  f.  klin.  Med,,  1905,  Bd.  Ixxxii.
TEE    TRINE:   SPKflKIC   yRAVITV


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8)*ni[>toiii.  seen  in  hysteria,  in  whicli  case  it  is  followcrl  by  a  pnlyuria.
h  may  be  due  to  Irauiiia.  to  the  ocflusion  of  the  urinary  passafjes.  as.
for  instance,  by  stones,  or  a  stone  on  one  side  and  reflex  anuria  on  the
other,  or  to  the  reflex  inflticncc  of  ncphrcctniny  on  one  side ;  or  to  the
condition  ot  ihe  renal  epiihehiini  ;i4  in  acute  nephritis,  tubertiilosis,
cystic  disease,  etc.  There  are  certain  other  so-called  "  pre-renal "  causes.
— cenain  cases  of  fevers,  as  scarlet  fever;  poisons,  as  ])hi>sphorus.
lead,  tuqieiitine,  etiier,  chloroform:  or  collapse,  and  usually  toward
death,  but  not  always.*  In  cholera  the  anuria  has  tiecn  attributed  to
Ihe  in*pissation  of  tlie  blood.  In  Moxon's  case  the  anuria  of  fourteen
days  recovered  after  passage  of  the  stone,  and  one  case  of  nineteen
days  then  recovery  is  recorded  (Adams).  Polk's  case,  whose  only
ki<lney  was  removed,  lived  eleven  days.
