Bilevel S, T And St - Hoffrichter CPAP User Manual

BILEVEL S, T AND ST

(only point 2 BILEVEL ST20/25)
General
In BILEVEL S, T and ST you can independently set the pressure during inspra-
tion (IPAP) and expiration (EPAP). Selecting an an optimal slope can facilitate
patients therapy compliance. A precise adjustment may further convey the feel-
ing of natural respiration without any delay.
BILEVEL S
In BILEVEL S the transition from inspiration pressure (IPAP) to expiration pres-
sure (EPAP) is triggered once the patient starts to breath. When the inspiration
fl ow ends, the pressure drops to the EPAP. In addition, a backup frequency
(Backup freq) can be activated. In the event of an apnea patients ventilation will
be continuously restored at fi xed parameters:
• IPAP, EPAP
• I-Slope, E-Slope
• Backup frequency
The parameters will be set by the physician.
During the expiration phase a negative pressure (vacuum) will not be created.
Pressure [hPa]
I E
20
IPAP
EPAP
4
Spontaneous breathing
BILEVEL S
I E I E
Delay time
= 15 s
Total
time lag
= Inspiration
I
I E I E I E
Backup
freq. =
10 s
Backup T mode
= Expiration
E
I E I
Time
Spontaneous breathing
Therapy modes 25