PTM Type HSE Pneumotachometer

PTM Type HSE Pneumotachometer

The HSE pneumotachometer PTM is a transducer for airflow measurement on rodents. The main feature of the new design is the small dead space. This ensures a good gas exchange in acute experiments. In combination with the silicon rubber tubing and the tracheal cannula the PTM is used for acute experiments (Intubation or tracheotomy). It is also designed for respiratory flow measurement on isolated lung of rats, guinea pigs or mice.

  • Ideal pneumotachs for mice, rats or guinea pigs
  • For isolated lung applications
  • Small dead space volume
  • Transparent design permits early detection of mucus in the pneumotach which helps to eliminate erroneous measurements

Item# Description U.S. List Price Quantity
73-0981 HSE-Pneumotachometer PTM for Mice (Type 378/0.9)
73-0980 HSE-Pneumotachometer PTM for Rats and Guinea Pigs (Type 378/1.2)
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The HSE pneumotachometer PTM is a transducer for airflow measurement on rodents. The main feature of the new design is the small dead space. This ensures a good gas exchange in acute experiments. In combination with the silicon rubber tubing and the tracheal cannula the PTM is used for acute experiments (Intubation or tracheotomy). It is also designed for respiratory flow measurement on isolated lung of rats, guinea pigs or mice.

  • Ideal pneumotachs for mice, rats or guinea pigs
  • For isolated lung applications
  • Small dead space volume
  • Transparent design permits early detection of mucus in the pneumotach which helps to eliminate erroneous measurements

These pneumotachs are made of transparent perspex, which allows good viewing of the inside during the experiment. It also makes these units easier to clean. The flow resistance consists only of straight boring and also is easy to clean.

The transparent design allows easy detection of any mucus that comes up into the PTM during the experiment. This prevents measurement errors caused by artificial increases of the airway resistance due to pneumotach obstruction. In addition the perspex has low heat transfer properties compared to metal so that heating is not needed to prevent condensation of the moisture in the expired air.

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.

Calibration:

The PTM type 378/X are only calibrated approximately. The values in the technical specifications are only nominal values and are subject to change in the range of manufacturing tolerance. Volume calibration (injection of a specific volume using a calibrated syringe and integration of the flow signal) must be performed for each experiment.

Specifications73-098173-0980
Dead Space Volume25 ul50 ul
Flow Resistance, Approximate1.0 mmH2O.ml/sec0.4 mmH2O/ml/sec
Nominal Flow Rate (ml/sec)+/-10.5 ml/sec+/- 27 ml/sec
Nominal Sensitivity (ml/sec/mmH2O)10 mmH2O for 10.5 ml/sec10 mmH2O for 27 ml/sec
SpeciesMiceRats, Guinea Pigs