Dräger Infinity Vista, Инструкция по эксплуатации, Страница: 148 / 280

8-18 Infinity Vista VF6
8 ECG
AND
H
EART
R
ATE
High P-Waves and T-Waves
To obtain the most accurate heart rate count, do the following:
z Follow the steps outlined for pacemaker patients, selecting the lead with the
highest R-wave relative to the T-wave and the P-waves or both.
z If inaccurate counting continues, reposition the electrodes until you obtain an
acceptable waveform. In addition, Dräger recommends monitoring the heart
rate for these patients with an SpO
2
sensor.
Pacemakers
Take special care in the evaluation of ECG waveforms.The monitor successfully
passed the pacer pulse rejection test. However, it is not possible to anticipate every
waveform characteristic.
WA R N I N G : T h e m o n i t o r m a y c o u n t h i g h a m p l i t u d e P o r T-
w a v e s ( > 0 . 2 m V ) o f l o n g d u r a t i o n a s Q R S c o m p l e x e s . T h i s c a n
r e s u l t i n m i s s e d l o w - r a t e a l a r m s . I f t h e d i s p l a y e d h e a r t r a t e
( H R ) i s h i g h e r t h a n t h a t i n d i c a t e d b y t h e w a v e f o r m , t h e
m o n i t o r m a y b e c o u n t i n g u n u s u a l l y h i g h T- w a v e s o r P - w a v e s
a s Q R S c o m p l e x e s .
WA R N I N G : I n c a s e o f u n c e r ta i n t y r e g a r d i n g t h e i n t e r p r e ta t i o n
o f Q R S c o m p l e x e s , t h e m o n i t o r i s d e s i g n e d t o e r r i n t h e
d i r e c t i o n o f f a l s e p o s i t i v e r a t h e r t h a n f a l s e n e g a t i v e a l a r m s .
I n pa c e d pa t i e n ts , Q R S c o m p l e x e s m a y n o t b e c o u n t e d ,
r e s u l t i n g i n f a l s e l o w - r a t e a l a r m s u n d e r t h e f o l l o w i n g
c i r c u m s ta n c e s :
z
F u s e d b e a ts a n d a s y n c h r o n o u s pa c e r s w h e n c o u p l i n g
i n t e r v a l s a r e + 1 0 t o – 9 0 m s .
z
7 0 0 m V pa c e r p u l s e s f o l l o w e d b y Q R S c o m p l e x e s
s m a l l e r t h a n 0 . 5 m V.
z
A s y n c h r o n o u s pa c e r p u l s e s w i t h o v e r s h o o t .