ANovemberhia9i7  }    Applying  Carrel-Dakin  Solution.  503 
tion.  Experiments  show  that  when  the  clamp  is  opened  all  the  way 
and  the  solution  is  running  full  force,  the  third  and  fourth  instilla- 
tion tubes  receive  very  little  if  any  of  the  liquid,  as  practically  the 
entire  flow  from  the  distributing  tube  is  carried  by  the  first  and 
second  tubes.    (See  Fig.  2.) 
Fig.  2.  Shows  uneven  distribution  of  solution  by  this  style  apparatus. 
Practically  all  of  solution  is  carried  by  first  instillation  tube,  very  little  by  the 
second  and  only  an  occasional  drop  by  the  third  and  fourth. 
While  this  form  of  apparatus  would  be  satisfactory  for  instilling 
large  shrapnel  wounds,  it  otters  the  further  objection  that  its  short 
instillation  tubes  attached  to  the  four  parallel  outlets  of  the  dis- 
tributing tube  must  all  be  directed  to  the  same  site  of  irrigation  and 
cannot  be  inserted  into  the  wound  from  different  sides  and  at  dif- 
ferent angles. 
Some  operators  have  gone  so  far  as  to  employ  with  this 
apparatus  a  glass  distributing  tube  having  as  many  as  eight  outlets 
connecting  with  eight  instillation  tubes,  even  though  experiments 
prove  conclusively  that  practically  all  of  the  solution  would  be 
carried  by  the  first  two  tubes  unless  it  is  supplied  at  so  great  a  rate 
as  to  cause  flooding  of  the  bed.  It  is  the  purpose  of  the  Carrel 
method  of  wound  disinfection  to  supply  only  enough  solution  to 
keep  the  inner  dressings  moist. 
