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V I N A Z U L F I A N I

1 5 1 8 0 1 2 1 5 2

P E R S E P T O R : D R . D O N I K U R N I A W A N S P , B .

Tugas : Sensitivitas dan

Spesifisitas

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Sensii!i"

The sensitivity of a clinical test refers to the ability ofthe test to correctly identify those patients with the

disease. A test with 100% sensitivity correctlyidentifies all patients with the disease. A test with80% sensitivity detects 80% of patients with thedisease (true positives but !0% with the disease go

undetected (false negatives.

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S#e$i%i$i"The specifcity o a clinical test reers to the ability

o the test to correctly identiy those patientswithout the disease.Thereore, a test with 100%specifcity correctly identifes all patients withoutthe disease. A test with 80% specifcity correctlyreports 80% o patients without the disease as testnegative (true negatives but !0% patients without

the disease are incorrectly identifed as test positive(alse positives.

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Bedside ultrasound may be an appropriate initial test to evaluate patients with

suspected acute appendicitis in the emergency department. One study found

bedside ultrasound had a sensitivity of 67.65% and a specificity of 98.!%1

A total of 97 adult cases underwent diagnostic ultrasound scans for

suspected appendicitis. Of 97 cases, 34 had acute appendicitis by

surgery/pathology report. Twentyfour "bedside ultrasound# $%&were positi'e for acute appendicitis and 11 were nondiagnostic of

(4 positi'e ultrasounds, (3 had appendicitis on pathology report.

There was 1 falsepositi'e result, yielding a sensiti'ity of )7.)*+

"9*+ condence li-its, 49.*+(.)+# and a specicity of 9.41+

"9*+ condence li-its, 91.4+99.7+# of (3 positi'e $%&, 1( cases

went to the Operating oo- without an abdo-inal 0T yielding a

1(+ reduction in 0T utiliation. 2f all positi'e $%& went to the O

without a 0T scan, this would yield a (4+ reduction in 0T utiliation!

&ON&LUSIONS: "edside ultrasound #ay be an appropriate initial test to evaluate patients with

suspected acute appendicitis in the e#ergency depart#ent!

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1. $edScape : Appendicitis 2-aging

!.N&BI, P'()e* : Di+n-sis -% +##en*i$iis (" (e*si*e '/+s-'n* in e ED,A) E)e/ e*. 2015

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eference :1. &'ford urnal )&ini$+ ess: sensii!i" +n* s#e$i%i$i"

!. *ltrasonography +s Still A *seful ,iagnostic Tool +n AcuteAppendicitis) -ournal of linical and ,iagnostic esearch.