PTM type 378/1.2 for rats
PTM type 378/0.9 for mice
HSE - PNEUMOTACHOMETER PTM type 378/X for rats and mice
The HSE pneumotachometer (PTM) type 378/X
is a transducer for airflow measurement. It is especially designed
for respiratory flow measurement on isolated lung of rats, guinea
pigs or mice. In combination with the silicon rubber tubing and
the tracheal cannula the PTM can also be used for acute experiments
(tracheotomy). The main feature of the new design is the small
dead space. The PTM is made of transparent perspex, this allows
a good view of the inside during the experiment or the cleaning.
If during the experiment mucus comes up into the PTM it’s
easy to detect and prevent for measurement errors caused by artificial
increasing of the airway resistance due to PTM obstruction. In
addition the perspex has the advantage over metall to present
low temperature conductivity so that no heating is needed to
prevent from condensation of the moisture of the expired air.
The flow resistance consists only of straight boring and is therefore
easy to clean.
The basic principle of the transducer is the generation of a
pressure proportional to the airflow across a flow resistance.
For the measurement of the pressure we recommend the VALIDYNE
differential pressure transducer type DP 45-14.
| type 378/1.2 for rats | type 378/0.9 for mice | |
| Nominal sensitivity: | 10 mmH2O for 27 ml/s | 10 mmH2O for 10.5 ml/s |
| Nominal flow range: | ±27 ml/s | ±10.5 ml/s |
| Flow resistance, approx: | 0.4 mmH2O/ml/s | 1.0 mmH2O/ml/s |
| Dead space, approx.: | 50 µl | 25 µl |
