Puritan Bennett KnightStar 330 Specifications download pdf (Page 46)

Under the test conditions listed in Table 7 on page 27, CO

rebreathing was minimal when the EPAP pressure was greater than 5

cmH

O. Rebreathing will vary depending on respiratory rate, tidal

volume, I:E ratio, and EPAP pressure. IPAP pressure will, to a lesser

degree, affect rebreathing.

Purge hole flow is an important factor in clearing CO

from the

circuit. In general, for any specific set of conditions, interfaces with

higher purge hole flows are expected to reduce the quantity of CO

remaining in the circuit. Puritan Bennett interfaces with higher purge

hole flows than the ADAM interface are available. Table 9 lists the

purge flows for Puritan Bennett interfaces.

It is important to properly fit the patient with an interface that will

provide comfort and proper treatment. Each interface listed has

different characteristics of fit and dead space. These are important

factors in interface selection.

Table 10 on page 43 shows the purge hole leak values associated with

different leak settings. It is important to select the correct leak setting

for a given interface so that the device will display the correct tidal

volume and leak.

For interfaces produced by manufacturers other than Puritan Bennett,

you may contact them for instructions and use Table 10 to select the

correct leak setting.

Table 9. Purge Flows for Various Interfaces

Interface Model

Purge Hole

Flow (L/min)

3 cmH

Purge Hole

Flow (L/min)

at 15 cmH

Leak Setting

ADAM™ 12 25 2

Breeze™ 13 30 3

Companion

14 34 5

SoftFit

and SoftFit Ultra

16 35 5

Sullivan

Modular

19 40 6

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 67 68

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Puritan Bennett KnightStar 330 Specifications Page 46

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