The sensitivity specification for a Millar Mikro-tip Pressure Catheter is 5 µV/V/mmHg. When using a Mikro-tip Pressure Catheter with an ADInstruments Bridge Amplifier the AEC-10D Catheter Interface Cable will be required. This cable configures the Bridge Amplifier to excite the catheter with 5 Volts of excitation voltage, and sets the output of the catheter to be 25 µV/mmHg. Some possible Units Conversion values for this equipment configuration are listed below (but it is always suggested to use a manometer to calibrate the catheter):
- 7.50 mV -> 300 mmHg
-
5.0 mV -> 200 mmHg
-
2.50 mV -> 100 mmHg
-
1.25 mV -> 50 mmHg
-
625 µV -> 25 mmHg
-
250 µV -> 10 mmHg
Note: the catheter will need to be pre-soaked and warmed prior to use as outlined in the catheter owner's guide. Additionally, any offset present in a catheter's output will need to be removed prior to each use via the zeroing function in LabChart's Bridge Amp settings dialog.
For further technical assistance with this or any other issue, please contact ADInstruments Technical Support by clicking HERE.