title: [The functional assessment of the upper urinary tract by the methods of 2-frequency impedance measurement and multichannel impedance ureterography].
abstract: The paper describes impedance methods of investigating upper urinary tracts (UUT) which may serve adjuvants in the diagnosis of the urinary tract wall disturbances due to diseases caused by impaired urine evacuation from the kidney and which may prove helpful in the choice of therapeutic policy, evaluation of the postoperative period and outcomes prognosis. UUT impedance tests can be performed during endoscopic manipulations or under open operative interventions. Two-frequency impedancemetry allows rapid detection of non-functioning UUT parts or sclerosal sites of the UUT wall, relevant criteria being the ratio of basic impedances of the site under low and high scanning current. This value is computed by an urological two-frequency impedancemeter IDU-M. To assess the UUT wall functionally, use should be made of 6-channel urological rheograph REUR-6 providing multichannel registration of immediate impedance ureterograms. In this manner one can obtain qualitative and quantitative assessment of the ureteral peristalsis through its all length, the criteria being the amplitude of impedance ureterographic complexes, their shape, duration, frequency, rhythm, sequence and rate of distribution. Loading tests increase the accuracy of UUT impedance measurements, are able to define compensatory reserves of the wall contractility. The introduction of rheological methods in urological practice makes broader the armory of diagnostic techniques in urology, upgrade pathogenetic validity of surgical and therapeutic measures.
authors.forename: I S
authors.initials: IS
authors.lastname: Mudraia
authors.forename: V I
authors.initials: VI
authors.lastname: Kirpatovskiĭ
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D004285:Dogs; D017097:Electric Impedance; D004568:Electrodiagnosis / Q000295:instrumentation / Q000379:methods*; D005069:Evaluation Studies as Topic; D005260:Female; D008297:Male; D009119:Muscle Contraction; D013997:Time Factors; D014513:Ureter / Q000502:physiology*; D014563:Urodynamics; D014570:Urologic Diseases / Q000175:diagnosis / Q000503:physiopathology
vernacular_title: Funktsional'naia otsenka verkhnikh mochevyvodiashchikh puteĭ metodami dvukhchastotnoĭ impedansometrii i mnogokanal'noĭ impedansnoĭ ureterografii.