| 摘要 |
<p>An Intelligent Electrocardiogram System that solves the problem of faulty electrical connections between a patient and an ECG instrument is disclosed. The electrode [38] employed by the invention comprises a disposable insulative pad [40] and a snap connector [42] that includes an LED [44] anchored in the top central portion of the snap connector [42]. Wires from the LED [44] run into a lead [45] that extend to an ECG instrument [46]. An adhesive [48] attached to pad [40] enables the electrode [38] to be secured on the skin of a patient. The electrode [38] includes a metal post [50] embedded in the center of pad [40]. The post [50] protrudes up from the insulative pad [40] through connector side [40b], which is the side opposite the side that touches the patient's skin. A spring contact [52] surrounds post [50] and provides an electrical coupling to one of the wires inside lead [46]. The bottom portion [50c] of the post [50] extends through and past a lower central surface [54] of pad [40] that is capable of holding a volume of conductive jelly [55]. A sensor circuit [49] connected to spring clip [52] includes a current source [62], a comparator [68], and a current limiting resistor [72]. A reference voltage Vr is applied to the comparator's negative input [70], while the positive input [69] is linked to spring contact [52]. The output of the comparator [68] flows through a resistor [72] that is coupled to LED [44]. When a change in the impedance between the conductive portion of the electrode [38] and the patient [10] is detected, the sensor circuit [49] activates the LED [44] on the faulty electrode. <IMAGE></p> |
