U.S. Range PS-4-20 Especificaciones descargar pdf (Pagina 26)

Setting Ti Max and Ti Min using the respiratory rate table:

1. Instruct the patient to breathe normally while comfortably sitting or

lying down.

2. Count the patient’s respiratory rate (breaths/minute).

3. Considering the patient’s respiratory disease, refer to the appropriate

range of settings in the table below (restrictive, COPD or normal) to

set Ti Max and Ti Min.

4. In the case of COPD or normal lungs, use the Ti Min default setting.

What does the trigger threshold do?

The trigger threshold is the ﬂow in liters/min used by the

Vsync

™

algorithm to determine the patient’s readiness to

receive a breath from VPAP (change from EPAP to IPAP).

In essence, as you change from Low to High, you’re

increasing the sensitivity of VPAP to the patient’s effort

as detected by measuring ﬂow in the breathing circuit.

When should I adjust the trigger sensitivity threshold?

The Medium (default) setting will be ideal for most patients.

Recommend the Low (or Very Low) trigger sensitivity

setting for the following conditions:

•Abnormally strong heartbeat, may cause cardiac oscillation and

subsequent auto-triggering (triggers before the patient inhales)

•Any time the patient complains that breaths are starting before inhaling

Recommend the High (or Very High) trigger sensitivity

setting for the following conditions:

•Patients with very weak respiratory effort

(eg, neuromuscular diseases)

•Any time the patient complains or there is evidence that

the device doesn’t seem to respond to inspiratory effort

Note: COPD patients may beneﬁt, but they may beneﬁt from an increase

in EPAP to compensate for auto PEEP or intrinsic PEEP. This should be

evaluated ﬁrst before considering the High trigger sensitivity setting.

What does the cycle threshold do?

The cycle threshold is used by the Vsync algorithm to deter-

mine the patient’s readiness to begin exhaling (change from

IPAP to EPAP). VPAP targets a percent of the peak ﬂow used

in each breath. For instance, the Medium setting targets 25%

of the peak ﬂow as the point where the patient is ready to

begin exhalation. The High setting targets 35% and the Low

setting targets 15%. As you adjust this setting, the patient

may notice a change in the time spent at IPAP.

When should I adjust the cycle sensitivity threshold?

The Medium (default) setting will be ideal for most patients.

Recommend the High (or Very High) cycle sensitivity

setting for the following conditions:

•In situations where a shorter inspiratory time is desirable (eg, COPD),

whereby a shorter inspiratory time is essential in order to preserve

an adequate expiratory time. Ti Max can also be used to shorten

inspiratory time

•Any time the patient complains that breaths are too long

Recommend the Low (or Very Low) cycle sensitivity

setting for the following conditions:

•In situations where a longer inspiratory time is desirable (eg,

neuromuscular diseases or patients with a very weak respiratory

effort). Ti Min can also be used to lengthen inspiratory time

•Any time the patient complains that the device seems to switch

from IPAP to EPAP too quickly

VPAP Technology Q&A

Setting TiControl

ResMed TiControl: Ti Min and Ti Max Calculation Guide

Respiratory

Frequency (bpm)

Restrictive

COPD

Ti Max

Normal

Ti Max

Ti Max Ti Min

30 1.0 0.5 0.7 1.0

29 1.0 0.5 0.7 1.0

28 1.1 0.5 0.7 1.1

27 1.1 0.6 0.7 1.1

26 1.2 0.6 0.8 1.2

25 1.2 0.6 0.8 1.2

24 1.3 0.6 0.8 1.3

23 1.3 0.7 0.9 1.3

22 1.4 0.7 0.9 1.4

21 1.4 0.7 0.9 1.4

20 1.5 0.8 1.0 1.5

19 1.6 0.8 1.0 1.6

18 1.7 0.8 1.1 1.7

17 1.8 0.9 1.2 1.8

16 1.9 0.9 1.2 1.9

15 2.0 1.0 1.3 2.0

14 2.1 1.1 1.4 2.1

13 2.3 1.2 1.5 2.3

12 2.5 1.3 1.7 2.5

24 S9 VPAP Tx Lab System | Sleep Lab Titration Guide

ResMed.com

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U.S. Range PS-4-20 Especificaciones Pagina 26

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