k.12 physics of the cardiovascular system

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DASAR INSTRUMENTASI CARDIOVASCULER DR. ZAIRUL ARIFIN, SpA, DAFK Departemen Fisika Kedkteran FK!USU MEDAN

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Page 1: K.12 Physics of the Cardiovascular System

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DASAR INSTRUMENTASI

CARDIOVASCULER

DR. ZAIRUL ARIFIN, SpA, DAFK

Departemen Fisika Kedkteran FK!USUMEDAN

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ELEKTRODA

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DIS"OSI#LE SURFACE ELECTRODE

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• E$ektrda mer%a& ar's in da$am t'%'&

ke ar's e$ektrn da$am ka%e$ kem'dian di

kirim ke re(rder.• Ter%aik dan ter%an)ak ada$a& e$ektrda

A*!A*C$, dipakai 'nt'k men(e*a&

p$arisasi. E$ektrda terpisa& dari k'$itmen(e*a& *erakan k'$it dari *an**'an

e$e(tri(a$ d'%$e $a)er.

"asta pen*&antar di isikan ke r'an*anantara e$ektrda dan k'$it.

• +enis e$ektrda ada$a& s'(tins, $atin*

meta$ %d)!s'ra(e, dr) dan mi(r.

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#LOCK DIA-RAM EC-

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CIRCUIT EC- AM"LIFIER

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AM"LIFIER

.EC- den*an sin*$e!ended s(i$$s(pe

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AM"LIFIER

/. EC- den*an dierentia$ amp$iier 

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. EC- den*an sin*$e!endeds(i$$s(pe, %an)ak intererensi dari

s'm%er /0 V %er'pa ar's kira!kira 1Ake da$am t'%'&. Ar's ini %er2a$an ke*r'nd me$a$'i # dan men*&asi$kansi*na$ e3tra kira!kira 0 3 $e%i& %esar dari

si*na$ EC-./. EC- den*an dierentia$ amp$iierdapat meminima$kan intererensi diatas.

Ar's 1A men*a$ir ke *r'nd se(araterpisa&. K'$it tak sta%i$ dan ta&anane$ektrda dari A ke # men)e%a%kante*an*an %iasa pada t'%'& %er%a& ke

si*na$ dierentia$ pada amp$iier.

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INTERFERENSI "ADA EC-

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"EN RECORDER MONITOR

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Dari amp$iier 'tp't %er2a$an me$a$'i

ka4at %ent'k (i$ da$am s'at' medan

ma*net, kem'dian *a$6anmeter akan%erp'tar %i$a ada ar's )an* me$a$'in)a

dan pena akan %er*erak men(atat %er'pa

*raik pada kertas )an* %er*erak."enan)a ada )an* %erisi tinta dan

me$a$'i ta%'n* kapi$er ke(i$ men'$is pada

kertas %iasa. 7an* $ain %er'pa '2'n*

 2ar'm )an* dipanaskan dan 8mem%akar9

pada kertas tertent' dan men*&asi$kan

*raik &itam den*an $atar %e$akan* p'ti&.

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Os(i$$s(pe mnitr 

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"ada ICU mnitr EC- %er'pa si$skp

)an* %er*erak den*an ke(epatan : (m;dt

a. Osi$skp 'nt'k mnitr pasien%. Osi$skp 'nt'k mnitr <!= pasien di

n'rse statin.

#iasan)a di$apisi sr a*ar %isa%erpendar se$ama %e%erapa detik.

Mnitr sekaran* men**'nakan

mikrkmp'ter 'nt'k men)impan &asi$

EC- n)a.

+e2ak *raik %er2a$an $am%at sepan2an*

$a)ar mnitr dan tidak red'p;&i$an*.

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AM#ULATOR7 ; >OLTER EC-

"rta%$e EC- )an* dapat memnitr /<

 2am. Dipasan* e$ektrda di dada pasien,imp'$s $istrik di transmitkan ke amp$iierdan dire(rd pada re(rder EC- ke(i$den*an tena*a %atere, %isa di ta$i

pin**an* ata' di sandan*.EC- TELEMETR7 S7STEM

"ada pasien )an* men)em%'&, %isa

pakai EC- den*an transmitter ke(i$&in**a pasien dapat %er2a$an di RS dan 2ant'n*n)a ter's dimnitr. #i$a adakeadaan tertent' seperti aritmia, tim%'$

a$arm pada re(ie6ern)a.

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E?ERCISE STRESS TESTIN-

Unt'k e6a$'asi (ardi6as('$er s)stem,

den*an men**'nakan EC-, mnitr,treadmi$$ dan 'nit tekanan dara&. Dipasan*e$ektrda di dada, di&'%'n*kan den*anEC- dan 'nit tekanan dara&. "rtk$

e3er(ise %erma(am!ma(am, ke(epatan dane$e6asi menin*kat se(ara %erta&ap, danse$ama e3er(ise kese&atan 2ant'n*dipanta' ter's.

>asi$n)a disimpan 'nt'k dek'mentasi danpentin* dipanta' ter's se$ama pem'$i&ankarena %isa tim%'$ pr%$em se$ama masaini.

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ELECTRO-RAM

Si*na$ e$ektris )an* direkam dari da$am 2ant'n*. Di'k'r den*an memas'kkan

e$ektrda kateter ke da$am 6ena sampaike 2ant'n*. Di*'nakan 'nt'kmempe$a2ari irama 2ant'n* )an*

a%nrma$."ada e$ektrisi$*i, 'nt'k inrmasipen)e%aran ran*san* dari SA nde ke6entri($e, 'nt'k men*kreksi per2a$anan

knd'ksi di 2ant'n* den*an RF ener*)me$a$'i %e%erapa kateter.

Resikn)a ke(i$, re$ati aman,

kem'n*kinan &an)a perdara&an ditem at mas'k kateter ke em%'$'& dara&

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Cardita(&meter 

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#i$a >R diatas ata' di%a4a& an*ka )an* kitatent'kan, 2ar'm meter kntak den*an a$armdan tim%'$ a$arm )an* %ar' %'n)i sete$a&se$an* 4akt' sek'ran*n)a : dtk, 'nt'kmen(e*a& a$arm pa$s' pada keadaansementara, seperti pasien )an* %erp'tar.

Sete$a& %e%erapa &ari pasta %isa kerin* dane$ektrda mati dipakai s'at' sirk'itden*an ar's rek4ensi tin**i dari sat'ka4at me$a$'i sat' e$ektrda, me$a$'i

t'%'&n)a dan kem%a$i me$a$'i e$ektrda$ain. #i$a sa$a& sat' e$ektrda mati, sirk'itini p't's dan tim%'$ tanda %er'pa $amp'tertent', men*in*atkan n'rse.

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Te*an*an dinaikkan sampai %e%erapa ri%' V$e& transrmer. Dide re(tiies mer%a&a( 2adi d( 'nt'k menaikkan m'atan di

kapasitr. #i$a s4it(& di n, kapasitrme$epaskan m'atan ke padd$es dan 2ant'n*.

"add$es %er'pa meta$ e$e(trde diameterB.: (m )an* di$apisi pasta, di$etakkan diatas dan %a4a& 2ant'n*. "e*an*ann)a darip$astik dan ins'$asi $istrik 'nt'k men(e*a&s&(k pada peratr. Ar's /0 A ke 2ant'n*se$ama : mdtk. Ar's ini meran*san* sem'att 2ant'n* pada 4akt' )an* samairama 2ant'n* nrma$.

@ >eart atta(k

6entri('$ar i%ri$$atin .

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" k i i $ $i t ik k 2 t

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"a(emaker men*irim p'$sa $istrik ke 2ant'n*'nt'k menrma$kan &eart rate. "a(emaker%iasan)a di imp$ant ke da$am kantn* dise%e$a& kanan 2ant'n*. Ka4at dimas'kkan ke6ena di %a&' sampai atri'm kanan dan me$a$'i6a$6e '2'n*n)a sampai pada dasar 6entri($ekanan.

Atri'm terpisa& dari 6entri($e $e& $apisan$emak )an* tidak men*&antarkan $istrik danimp'$s sara. #i$a AV nde r'sak, 6entri($e tak%er&enti mmpa karena ada nat'ra$ pa(in*(enters )an* %eker2a %i$a tak dapat imp'$s dari

atri'm se$ama / dtk >Rn)a &an)a 03;mnt'nt'k memperta&ankan &id'pper$' pakaipa(emaker %erisi *eneratr p'$sa )an*men*irim p'$sa se%an)ak B/3;mnt. S'm%er

da)an)a %er'pa %atere ke(i$ )an* ta&an $ama.

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#LOOD FLO

E$e(trma*neti( $4meter 

T k t i d k i d $

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Te*an*an akan terind'ksi da$amknd'ktr )an* %er*erak da$am medanma*net. Ini dapat men*'k'r a$iran p'$sa.

Dara& se%a*ai knd'ktr e$ektrik, makate*an*an akan tim%'$ %i$a dara& men*a$irme$a$'i medan ma*net.

Te*an*an terind'ksi e se2a$an den*anke(epatan knd'ktr u  @rata!rata $'mendan dindin* pem%'$'& dara&, kek'atanma*neti( $'3 densit) B dan pan2an*

antar e$ektrda l. "r%e )an* ke(i$ dapatdi%'at dari e$ektrma*net inti %esi 'nt'kmenin*katkan kek'atan si*na$n)a.E$ektrda di%'at kntak den*an dindin*

$'ar pem%'$'& dara&.

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ULTRASONIC FLOMETER

S d & d $ k

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Sensr pada s(an &ead men)a$'rkansi*na$ dari si$atr dan menerima*e$m%an* pant'$ dari se$ dara&. RF

amp$iier memperk'at si*na$ penerimadan pem%a4a rek4ensi, kem'dian AFsi*na$ di&asi$kan $e& detektr.

A$at ini %iasan)a di*'nakan 'nt'kmen*'k'r ke(epatan a$iran dara& perier.

Ini dapat men*'k'r a$iran p'$sa. Dpp$erpr%e p'n)a piee$ektrik '$tras'nd

transd'ser )an* di*'nakan 'nt'kmer'%a& si*na$ $istrik ke %'n)i. akt'pen*iriman dan penerimaan ke(epatan*e$m%an* '$tras'nd mem%'at a$at inidapat men*'k'r ke(epatan a$iran dara&.

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LASER!DO""LER FLOMETER

Sinar $aser dipan(arkan ke pem%'$'&

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Sinar $aser dipan(arkan ke pem%'$'&

dara& dan dipant'$kan ke detektr.

Ca&a)a )an* memtn* *erakan se$

dara& mera& mer'pakan Dpp$er!s&ited.

Ca&a)a di 2arin*an di&am%'rkan $e&

 2arin*an tetap dan sampai ke detektr

tanpa men*a$ami Dpp$er s&it. A$at inidapat men*'k'r ke(epatan a$iran dara&

da$am pem%'$'& dara& ke(i$;kapi$er.

Ke'nt'n*an 'tama a$at ini ada$a& dapatmen*'k'r a$iran di re*i, mempe$a2ari

6ariasi a$iran dara& me$a$'i (ardia( ()($e,

 2'*a irama )an* $am%at.

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Kateter dimas'kkan keda$am pem%'$'&

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Kateter dimas'kkan keda$am pem%'$'&dara&. Transd'ser '$trasnik )an*%erp'tar di$etakkan dan meneran*i

dindin*n)a. "ant'$an dari da$am dan $'arperm'kaan dindin*n)a dapat se(aratepat menent'kan dimensi $'men arteri,area penampan* me$intan*, te%a$ dan

mr$*i dindin*n)a. "em%'$'& dara&e$astis, per%edaan tekanan da$am dan$'ar pem%'$'& dara&@tekanan

transm'ra$ sa$a& sat' )an* men*ntr$ 2ari!2arin)a. Distri%'si 6$'me dara&ditent'kan $e& &'%'n*an antaratekanan $ka$ den*an kesan**'pan

distensi pem% $ & dara& Dara& $e%i&