The evaluation by means of ultrasounds of the bladder residue after gynaecological operations.

An echographic study of the bladder in 42 patients after gynaecological operation has been carried out to evaluate the urinary residue. We prove that we have a better approximation to the real urinary volumes, using the ellipsoid formula that permits the measuring of the longitudinal, front-rear and lateral-lateral diameters of the bladder; then we elaborated tables that gave us directly the quantity of urine in the bladder of the three diameters echographically measured.