Abstract
BackgroundHydraulic dilatation is a novel method of cervical dilatation that is based on continuous controllable dilatation (CCBD) by the pumping of fluid into the balloon extension of the system. The main advantage of this procedure is that it allows control of and insight into the process of cervical dilatation.MethodsFor the purposes of our research, we created a new and upgraded system for CCBD which consists of a programmed hydrostatic pump connected to a balloon extension. With regard to our aim to precisely measure and determine the location of the cervical resistance, we placed two pressure-measuring films, one on the top and one on the bottom of the balloon extension. This study included 42 patients in whom cervical resistance was measured before suction curettage.ResultsCervical dilatation and measurement of cervical resistance were successful in all patients. The analysis of the pressure-measuring films showed that the points of highest resistance were located in the zone of the internal cervical os and that these values were much higher than those in the zone of the external cervical os (0.402 versus 0.264 MPa at the upper pressure-sensitive film; 0.387 versus 0.243 MPa at the lower pressure-sensitive film). This study also showed that an increase in cervical resistance in the zone of the internal cervical os was followed by an increase in cervical resistance in the zone of the external cervical os.ConclusionsDuring CCBD, the internal cervical os is the centre of cervical resistance, and the values do not decline with the number of miscarriages or the number of previous births.Trial registration numberISRCTN Registry identifier: ISRCTN30949871. Date of registration: 13 May 2015.Electronic supplementary materialThe online version of this article (doi:10.1186/s13063-015-1003-8) contains supplementary material, which is available to authorized users.
Highlights
Hydraulic dilatation is a novel method of cervical dilatation that is based on continuous controllable dilatation (CCBD) by the pumping of fluid into the balloon extension of the system
The values of the cervical resistance during CCBD on the upper Pressure-sensitive film (PSF), which were measured in the zone of the internal cervical os (ICO), ranged from 0.144 MPa to 0.559 МРа, with an average of 0.402 ± 0.097 МРа
Further analysis showed that the values of cervical resistance in the zone of the ICO were in positive statistical correlation with the values of the cervical resistance measured in the zone of the external cervical os (ECO) (p = 0.000)
Summary
Hydraulic dilatation is a novel method of cervical dilatation that is based on continuous controllable dilatation (CCBD) by the pumping of fluid into the balloon extension of the system. The main advantage of this procedure is that it allows control of and insight into the process of cervical dilatation. The main advantage of CCBD is that it gives the physician control over the dilatation process and makes the procedure safer for the patient and less stressful for the physician than other methods. CCBD is a safer and more reliable method of cervical dilatation than other methods and can be used to monitor and analyse the insufficiently researched process of artificial dilatation of the uterine cervix. We sought to precisely determine the resistance given by the uterine cervix during dilatation using the CCBD method
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
