Medical devices and methods of use

1. A medical device comprising:

a handle coupled to an elongated shaft with a distal end;

an image sensor carried at the distal end;

a flex circuit with a proximal end having a flex circuit connector and a distal end electrically coupled to the image sensor, wherein a proximal tail portion of the flex circuit extends outwardly from the handle and a middle portion of the flex circuit extends continuously through the handle and shaft; and

an accelerometer carried at the distal end of the shaft and wherein a distal end of the flex circuit is electrically coupled to the accelerometer.

2. The medical device of claim 1 wherein the flex circuit connector is adapted for connecting to a plurality of electrical contact elements of a cable connector assembly at an end of an electrical cable.

3. The medical device of claim 2 wherein the flex circuit connector includes at least 10 electrical leads configured for connecting to a plurality of electrical contact elements in the cable connector assembly.

4. The medical device of claim 2 wherein the cable connector assembly carries a circuit board with a processor.

5. The medical device of claim 4 wherein the processor is adapted for image processing.

6. The medical device of claim 1 further comprising an LED carried at the distal end of the shaft and wherein a distal end of the flex circuit is electrically coupled to the LED.

7. The medical device of claim 1 wherein the accelerometer is adapted to send position signals to a controller, and the controller is configured to display images from the image sensor on a display in a selected orientation no matter a rotational position of the shaft and the image sensor.

8. The medical device of claim 1 further comprising a fluid source in communication with a first channel in the shaft configured to provide a fluid inflow into a treatment site.

9. The medical device of claim 8 further comprising an inflow pump operatively connected to the fluid source for providing the fluid inflow.

10. The medical device of claim 9 further comprising a second channel in the shaft adapted for connection to a negative pressure source.

11. The medical device of claim 10 wherein the negative pressure source comprises an outflow pump for providing a fluid outflow from the treatment site.

12. The medical device of claim 11 wherein the inflow pump and the outflow pump are controlled by a controller to maintain a set pressure in the treatment site.

13. The medical device of claim 11 wherein the second channel is configured for introduction of a tissue treatment tool therethrough.

14. The medical device of claim 13 wherein the tissue treatment tool comprises at least one of a grasper, a tissue sealing device, an ablation device and a resection device.

15. The medical device of claim 1 wherein the accelerometer is coupled to the flex circuit at the distal end of the shaft.