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.
