ABSTRACT
HSG reveals only a mechanical patency of the tubes while selective tubal pressure (STP) measurement gives additional information about the physiological status also. STP can be easily assessed by hysteroscopy without cannulating the tubes with a plastic catheter. The steps of the procedure are as follows:
The patient is taken in the usual lithotomy position, the diagnostic hysteroscope is introduced and both the tubal openings are visualized. By raising the head end of the patient by about 45 degrees the uterus becomes relatively more anteverted with respect to the ground and the fundus becomes the highest point of the uterine cavity. In such a situation any micro air bubble which is introduced any where inside the uterine cavity shall immediately rise and park itself in the fundus.
