| 摘要 |
PURPOSE:To provide the measuring method which can execute exactly a measurement by correcting simply a capacity measurement error caused by a shape individual difference of the heart, and the catheter used therefor, in the measuring method of the ventricle capacity using a conventional conductance catheter system. CONSTITUTION:In the conductance catheter system measuring method for measuring the ventricle capacity by inserting a catheter in which plural pairs of electrodes 3-10 are embedded into the ventricle, allowing a feeble AC current to flow steadily between one pair or two pairs or more of electrodes 3-10, and measuring continuously an impedance variation of the feeble current flowing between the remaining electrodes 3-10, expanding a balloon 11 of electric insulation in the ventricle, and correcting a ventricle capacity measured value by using a ratio of the expansion capacity of the balloon 11 in that case and a difference of the ventricle capacity measured values before and after the expansion. The catheter used for this measuring method is provided with the freely expandable balloon 11 of electric insulation in its tip part. |
