Dräger Atlan A100 Instructions For Use Manual page 90

Assembly and preparation
4.8.4.1 Calculating the resistance of the breathing system and connected
accessories
The sum of the resistance values in the inspiratory limb must not be less than
–6.0 hPa (cmH
exceed 6.0 hPa (cmH
Only include resistance values in calculations that were taken under the same flow
conditions:
Patient category
Adults
Pediatric patients
Neonates
The following formula is used to calculate the resistance (R):
R
Inspiration
R
Breathing system
(Y-piece)
R
Expiration
R
Breathing system_exp
If necessary, take into consideration other parts such as water traps or additional
hoses. The specifications for the resistance of the breathing system can be found
on page 297. The specifications for all other accessories can be found in the
respective instructions for use.
In these instructions for use, the specifications for the resistance in the inspiratory
limb are regarded as negative values. The resistance values given in the
instructions for use for the accessories must therefore be subtracted from the
inspiratory resistance of the breathing system.
Example of calculation: Adult breathing hose with filter on Y-piece, no filters
on the ports
Breathing system with reus-
able CO
posable dust filter
Breathing hose
Breathing bag hose
Filter at inspiratory port
Filter at expiratory port
Filter at Y-piece
Result
Since R
(cmH
90
O). The sum of the resistances in the expiratory limb must not
2
O).
2
=
_ - R
insp Insp hose
=
+ R
Exp hose
absorber and dis-
2
is greater than –6 hPa (cmH
Inspiration
O), this configuration may be used.
2
Instructions for use
Flow
30 L/min
15 L/min
2.5 L/min
- R - R
Breathing bag hose
+ R + R
Exp filter (port) Exp filter (Y-piece)
Inspiratory resistance
[hPa (cmH O)]
2
at 30 L/min
R –1.2
Breathing_sys-
tem_insp
- R 0.5
Insp_hose
- R 0.3
Breathing_
bag_hose
- R 0
Insp_filter(port)
- R 2
Insp_filter(Y-piece)
R –4.0
Inspiration
O) and R
2
|
Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n
- R
Insp filter (port) Insp filter
Expiratory resistance
[hPa (cmH O)]
2
at 30 L/min
R 2.9
Breathing_system_-
exp
+ R 0.5
Exp_hose
+ R 0
Exp_filter(port)
+ R 2
Exp_filter(Y-piece)
R 5.4
Expiration
is less than 6 hPa
Expiration