The citizen-Republican. (Scotland, Bon Homme County, S.D.) 1???-19??, 1914-07-09

fWTlSl ne IeeiS IHe purse. Lis ~
a little triphammer stroke transmitted
to his fingers. He may notice that the
pulse is fast and bounding, or that II
Is slow and soft. In this simple test
he has been making a crude effort to
determine the blood pressure and TO
discover the rapidly of the hearts &C
ton.
The second half of the test. deter
mining the pulse rate, developed about
as far as it could be developed when
the use of watches with second hands
became general. The determination OF
blood pressure was a guessy perform
ance until a few years ago-when simple
instruments for it's measurement began
to be generally used. We have learned
more about blood pressure In the last
10 years than in all the preceding his
tory Of the world combined, and the
probability is that the next 10 years
Will teach us more than the last 10.
The blood pressure apparatus is a
means of measuring with a mercury
column the impulse which, when felt
with the finger. we called a bounding
pulse or a soft pulse, as he case might
be. The blood pressure apparatus con-
S1StS OF an unelaStic cloth band, within
which is a hollow rubber tube, similar
to an automobile tire. The inner tube
air pump and on the other with a coll
umn of mercury and a perpendicular
! scale.
The band is fastened loosely around
the bare arm. The inner tube is blown
up. AS the band will not allow expan-
sion externally, as the tub initiates 1t
must compress the arm. The initiation
is continued until the pulse canno be
felt at the wrist. In the meanwhile,
as the pressure on the arm increases,
the mercury is forced up the perpen-
dicular tube.
When the pulse disappears the
amount of pressure is show by the,
height to which the mercury has
mounted. We speak of 120, meaning
that the column of mercury has risen
i20 milimeters, or about AT inches.
Some of the blood pressure apparat-
uses, instead of using a column of mer-
curry as a recorder, make use of a dial
and hand, somewhat similar to the ar
rafgement of a water gauge or steam
pressure recorder. When the brachial
artery, the artery of the arm, is pressed
on until caught between the bone and
the inner tube, no blood can flow into
the radial artery. and in consequence
the radlal pulse disappears.
Blood pressure then is the amount of
pressure or squeezing necessary to ap-
ply to the arm to collapse the brachial
artery. The pressure applied to the
skin is transmitted the artery without
losing force. Therefore the measure of
the pressure in the inner tube is a
measure of the tension of the blood in
the artery. The blood in the artery is
wau with ctIT. ~ $50 80
that shown by the column of mercury
to be the pressure in the inner tube.
HI max the blood in the artery
If forces tba b1aoa ;n+n 49, on nt .
The alas+ie ertaniaI ,,nU. ~ ! les.
blood 70 lreon - naav, a. suassNo M, Wv
amount Of beart so,,saza 90 tthhe
amount of wall squeeze is lust equal TO
Az ~ 49, u IoLce necessary 10 push
ca,;iIa rias ona .ns nc Nesseis,
ag,in IF .; 4Au III paen 10 the heart
sure of no bIood a. ~ ate p.eS-
force wonid 10 ,ao ~ n'ue
artery.
The large artery oo-ni,a oee A.
heart is caiied 10 "a ,ne
because ire d;scoyarer = So ~ ~
carried air. 1t was tbo,sht to -.
air because after death il was fo,1nd
of hIooI and ~ IA. III ef1,l neally empty
aorta tas . VII stift I'LL sas,
make il remain round ana ,naone "
when empty.
This. however. is rot tr,,a or tho
smaller arteries. Drain the HOOD ont
Of them and a featner,e waigh+ lii III,
collapse them Tb,.refore .t ( WI
pressure is a mea s,,ra Of +ha lI p5oot
the artery and not q ,'aa - oioeo ~
of the wau u tae
If Won have avar .. +oboa
blood pressure was 49,, Mten lme
no+ieed 49,. - 80 taheh Noa nave
zach pulse beat and dow ru,is up up wleh
the heats IF an 80 aomn petween
err was ,,sad yo,, .nt;oaa gu record
PLAYED back and rfosii : = w Nc me neeaie
What is called the blnal ~ same way.
highest noint ra - J,o9o pressure is the
or the mercury the ns me needle
% re "flst pulse stops.
To speak more acc,r.
Iner pumns nm tho t,,ho 1le exam
no longer any nnlse - hnei !here is
then permits air ~ $50 ale Mrist; he
first faint trace ~ eeeaps untN the
felt This is o,I,,a q pulse can De
then allows mora ~ : pressure
IS replaced bv a f,,iI n,Iss WIS" ri puise
at which the fun nnlsa ann..r pom.
off as the diastolic res appeais IS READ
between tbase SUI me OF
pulse pressure teauilss is the
The diastSlic nres.,ra
tension of the bIond - .he measure
.ween hear heats VINE artery be-
and throws Mneli the heart
,lood into ~ an extra quantity of
aiteIy the pressure |