﻿146 
  

  

  Mr. 
  A. 
  H. 
  Garrod 
  on 
  the 
  

  

  Pulse-rate. 
  

  

  First 
  cardio-arterial 
  

   interval 
  

   with 
  syspasis 
  subtracted. 
  

  

  Second 
  

   cardio-arterial 
  

   internal. 
  

  

  oo 
  

  

  

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  u-± 
  

  

  

  •00 
  9974.9^'' 
  

  

  81 
  

  

  •00220541' 
  

  

  •00220546' 
  

  

  100 
  

  

  •0021875' 
  

  

  •00218745' 
  

  

  121 
  

  

  •00208455' 
  

  

  •0020847' 
  

  

  144 
  

  

  •0020185' 
  

  

  ■0020185' 
  

  

  170 
  

  

  •0019704' 
  

  

  •0019729' 
  

  

  After 
  the 
  completion 
  of 
  the 
  cardio-sphyginograph 
  tracing 
  above 
  re- 
  

   ferred 
  to, 
  it 
  was 
  my 
  endeavour 
  to 
  obtain 
  satisfactory 
  double 
  sphygrno- 
  

   graph 
  tracings 
  from 
  arteries 
  at 
  different 
  distances 
  from 
  the 
  heart. 
  Two 
  

   or 
  three 
  unsuccessful 
  attempts 
  suggested 
  the 
  plan 
  which 
  has 
  proved 
  suc- 
  

   cessful. 
  It 
  was 
  soon 
  evident 
  that 
  there 
  is 
  only 
  one 
  artery, 
  other 
  than 
  the 
  

   radial, 
  which 
  it 
  is 
  possible 
  to 
  manipulate 
  with 
  any 
  degree 
  of 
  facility, 
  

   especially 
  when 
  the 
  experimenter 
  is 
  the 
  subject 
  of 
  experiment. 
  This 
  

   artery 
  is 
  the 
  posterior 
  tibial 
  at 
  the 
  ankle, 
  where 
  it 
  runs 
  in 
  the 
  interval 
  

   between 
  the 
  internal 
  malleolus 
  and 
  the 
  tuberosity 
  of 
  the 
  os 
  calcis, 
  just 
  

   before 
  it 
  gives 
  off 
  the 
  internal 
  calcaneal 
  branches. 
  On 
  myself, 
  this 
  artery 
  

   is 
  as 
  superficial 
  and 
  as 
  easily 
  reached 
  as 
  the 
  radial 
  ; 
  in 
  the.sitting 
  posture 
  

   it 
  is 
  quite 
  under 
  command 
  when 
  the 
  foot 
  is 
  crossed 
  over 
  the 
  opposite 
  

   knee 
  ; 
  it 
  is 
  considerably 
  further 
  from 
  the 
  heart 
  than 
  the 
  radial 
  ; 
  and 
  to 
  

   obtain 
  as 
  great 
  a 
  difference 
  as 
  possible, 
  the 
  right 
  wrist 
  was 
  on 
  all 
  occa- 
  

   sions 
  the 
  one 
  experimented 
  on, 
  the 
  wrist 
  and 
  the 
  ankle 
  being, 
  as 
  far 
  as 
  

   can 
  be 
  estimated 
  on 
  the 
  living 
  body, 
  29 
  inches 
  and 
  52J 
  inches 
  respec- 
  

   tively 
  from 
  the 
  aortic 
  valves. 
  

  

  Before 
  going 
  further 
  it 
  will 
  be 
  necessary 
  to 
  consider 
  the 
  sphygmograph- 
  

   trace 
  from 
  the 
  posterior 
  tibial 
  artery 
  at 
  the 
  ankle. 
  Wolff 
  * 
  has 
  published 
  

   the 
  results 
  of 
  his 
  observations 
  on 
  the 
  dorsalis 
  pedis 
  artery 
  ; 
  and 
  as 
  they 
  

   correspond 
  with 
  those 
  from 
  the 
  ankle 
  trace 
  of 
  the 
  posterior 
  tibial, 
  they 
  

   may 
  be 
  recapitulated. 
  He 
  remarks 
  that 
  the 
  pulse 
  at 
  the 
  foot 
  has 
  a 
  

   general 
  resemblance 
  to 
  that 
  at 
  the 
  wrist, 
  it 
  differing 
  in 
  the 
  primary 
  

   ascent 
  being 
  less 
  abrupt 
  and 
  the 
  summit 
  less 
  acute. 
  In 
  the 
  descent 
  the 
  

   secondary 
  undulation 
  is 
  remarkably 
  insignificant. 
  The 
  other 
  minor 
  

   undulations 
  are 
  less 
  constant. 
  My 
  observations 
  confirm 
  the 
  above 
  with 
  

   respect 
  to 
  the 
  general 
  similarity 
  between 
  the 
  two 
  pulses, 
  the 
  greater 
  

   obliquity 
  of 
  the 
  primary 
  rise, 
  and 
  the 
  less 
  constant 
  character 
  of 
  the 
  minor 
  

   undulations 
  ; 
  the 
  secondary 
  rise 
  has, 
  however, 
  never 
  struck 
  me 
  as 
  pecu- 
  

   liarly 
  insignificant, 
  though 
  it 
  has 
  peculiarities, 
  to 
  be 
  mentioned 
  imme- 
  

   diately. 
  

  

  The 
  ankle 
  trace 
  of 
  a 
  pulse 
  at 
  about 
  70 
  a 
  minute, 
  as 
  taken 
  with 
  an 
  

   * 
  Characteristik 
  des 
  Arterienpuls. 
  

  

  