Patent ID: 7333844

Claim:
A transvaginal device for measuring the pH of a female patient's uterine tissue, comprising: a. a first elongated shaft which is configured to extend through the female patient's vaginal canal and which has proximal and distal ends, a first port in the proximal end, a second port in the distal end and an inner lumen extending within the shaft in fluid communication with the first and second ports; and b. a second elongated shaft which is configured to be slidably disposed within the inner lumen of the first elongated shaft, which has a proximal end and a distal end, which has an active electrode at the distal end of the shaft configured to sense an electrical parameter representing pH of the patient's uterine tissue and to generate a signal representing the sensed parameter and which is configured to transmit the signal from the active electrode representing the pH; and c. a resilient interconnection between the first and second elongated shafts which has a biasing mechanism to urge the second elongated shaft distally with respect to the first elongated shaft to facilitate slidable motion therebetween and configured to extend the distal end of the second shaft distally beyond the distal end of the first shaft to ensure that the active electrode on the distal end of the second shaft engages uterine tissue.