General (methodology, system set-up, etc.)
Q: Some patients experience discomfort when the band electrode tape is removed. Can the adhesive portion of the tape be trimmed to avoid this?
A: Yes. The adhesive surface area of the band electrode tape may be trimmed a little on each side of the metal portion, as long as the metal remains in contact with the skin with no slippage; therefore, this should be done only in situations when the patient or subject will not be moving at all, insuring that the bands cannot slip or change position.
Q: Could moving the ECG cable lead affect the SV and CO values?
A: Yes. Electrodes #1 and #4 are current electrodes for the impedance signal. The impedance signal is proportional to both the current and the subject's resistance (Zo = Resistance x Current rms). Moving electrode #1 (or #4) could affect the current path or the current density detected by the voltage electrodes #2 and #3 such that the Zo value in this region of the subject is altered. Since the Zo value is squared in the denominator of the SV equation, such an alteration in its value would have a rather pronounced affect on the resulting SV value. The dZ/dt maximum value would also be affected, but not to the extent of Zo.
Q: The Dinamap blood pressure tubing does not fit with the supplied Blood Pressure Synchronization Switch & Sensor (BPSW). Is there an alternative way to connect the BPSW?
A: Yes. The Dinamap is compatible with the BPSW. The Dinamap tubing may have to be cut in order to insert the BP Sensor's luer-lock tapered hose fittings in series with the tubing. If the Dinamap tubing has an inner diameter greater than 1/8", then a larger size hose fitting of 5/32" can be supplied by BIT.
Q: The set-up portion of the software asks for front and back electrode distance. How are these measured?
A: These front and back thoracic distances should be measured from the bottom edge of band #2 to the top edge of band #3 relative to the conductive portions of the bands.