Methods and apparatus for determining fallopian tube occlusion

1. A method to determine fallopian tube occlusion comprising:

distending a uterus with a first fluid, the uterus including a first cornua of a first fallopian tube and a second cornua of a second fallopian tube;

coupling a device to the first and second cornua to fluidly separate a corresponding first and second sealed portions of the first and second cornua from the remainder of the distended uterus;

evacuating a first volume of the first fluid from the first sealed portion, and evacuating a second volume of the first fluid from the second sealed portion;

measuring the first volume of the first fluid, and measuring the second volume of the first fluid;

supplying a second fluid to the first and second sealed portions;

measuring a third volume of the second fluid supplied to the first sealed portion, and measuring a fourth volume of the second fluid supplied to the second sealed portion;

comparing the first volume of the first fluid to the third volume of the second fluid to determine if the first fallopian tube is occluded, and comparing the second volume of the first fluid to the fourth volume of the fourth fluid to determine if the second fallopian tube is occluded.

2. The method of claim 1 , wherein the first fallopian tube is determined to be occluded if the third volume is within 10% of the first volume, and the second fallopian tube is determined to be occluded if the fourth volume is within 10% of the second volume.

3. The method of claim 1 , wherein measuring the first and second volumes comprises measuring with a marked syringe.

4. The method of claim 1 , wherein measuring the first volume comprises measuring 1 cc or less, and measuring the second volume comprises measuring 1 cc or less.

5. The method of claim 1 , further comprising visually confirming that the second fluid does not leak into the first fluid in the remainder of the distended uterus.

6. The method of claim 1 , wherein coupling the device to the first and second cornua to fluidly separate the corresponding first and second sealed portions of the first and second cornua from the remainder of the distended uterus comprises:

expanding a first balloon end portion of a first catheter against the first cornua, and expanding a second balloon end portion of a second catheter against the second cornua.

7. The method of claim 6 , further comprising expanding the first and second balloon end portions with a single air or fluid source.

8. The method of claim 6 , further comprising expanding the first and second balloon end portions with separate air or fluid sources.

9. The method of claim 6 , wherein coupling the device to the first and second cornua to fluidly separate the corresponding first and second sealed portions of the first and second cornua from the remainder of the distended uterus comprises:

expanding a spring mechanism to form an open Y-position with the first and second catheters.

10. The method of claim 6 , further comprising applying a vacuum to a first vacuum cavity in the first balloon end portion and to a second vacuum cavity in the second balloon end portion to engage the first and second cornua.

11. The method of claim 1 , wherein coupling the device to the first and second cornua to fluidly separate the corresponding first and second sealed portions of the first and second cornua from the remainder of the distended uterus comprises:

expanding a uterine balloon and engaging the first and second cornua with the expanded uterine balloon.

12. The method of claim 1 , wherein the second fluid is not soluble with the first fluid.