IUD Uterine Vascularization and Side Effects
|First Received Date ICMJE||June 19, 2007|
|Last Updated Date||June 20, 2007|
|Start Date ICMJE||January 2004|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE
||Ultra-sound doppler, IP and IR indexes [ Time Frame: 3 mo ]|
|Original Primary Outcome Measures ICMJE||Same as current|
|Change History||Complete list of historical versions of study NCT00489463 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE
||pelvic pain, uterine bleediing [ Time Frame: 3 mo ]|
|Original Secondary Outcome Measures ICMJE||Same as current|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||IUD Uterine Vascularization and Side Effects|
|Official Title ICMJE||The Effect of the Levonorgestrel-Releasing Intrauterine System and the Copper-Intrauterine Device (TCu 380A) on Subendometrial Microvascularization and Uterine Artery Blood Flow.|
The aim of this study was to evaluate the effect of the LNG-IUS and TCU 380A users on the sub-endometrial vascularization and the uterine artery blood flow using power Doppler analysis and ultrasonography pulsed color Doppler during the precise mid-luteal phase.
Design We will perform a prospective (quasi-experimental) clinical trial. Patients/Methodology We prospectively will enrolled consecutive patients who wants to use IUD (LNG-IUS or TCU 380A). We will evaluate the sub-endometrial blood flow using power Doppler analysis, uterine artery blood flow using pulsatility and resistance index and endometrial thickness before IUD insertion and three months later.
The inclusion criteria are: 1. regularly menstruating women (menstrual cycle varying between 24-35 days); 2. Normal serum TSH, FSH and prolactin levels (as measured on day-3) and with less than 40 years. Contraceptive pills or any kind of hormonal medication had not been taken for (at least) 3 months prior to the study and any intrauterine device had necessarily been removed at least 3 months earlier. Patients will be allowed to not use non-steroidal anti-inflammatory drugs (NSAID) within 24 h prior to any examination.
The exclusion criteria are pregnancy, acute or chronic pelvic inflammatory disease, menorrhagia for unknown reason, copper allergy, cervicitis, dysplasia in the cervix or genital tumor. All patients underwent a gynecological examination and had a Papanicolaou smear taken during the previous 12 months.
All patients will be daily examined with US after the eighth day of the cycle, and follicular development will be observed to confirm ovulation; they are then examined in the mid-luteal phase, 6-9 days after ovulation, to obtain the power Doppler energy (PDE) measurement, pulsatility index (PI), resistance index (RI) and endometrial thickness (ET) by ultrasound (US) scans. The study was approved by the Ethical Committee of Hospital de Clinicas de Porto Alegre, IRB equivalent (# 02-127) and informed consent was obtained from all patients.
Patients will be allocated into 2 groups according to the IUD: LNG-IUS (group A) or TCu 380A (group B).
Three months after the LNG-IUS (group A) or TCu 380A (group B) insertion, also in the mid-luteal phase (6-9 days after ovulation, confirmed by US), all subjects repeated the same study protocol.
The sonographic equipment that will be used consisted of a SONOACE 9900 (Medison SA – Korea). The PDE, PI and RI will be performed on a transvaginal route. The settings for Power Doppler sonography are standardized for the highest sensitivity in the absence of apparent noise using a high pass filter at 50 Hz, pulsed repetition frequency at 750 Hz, and moderate long persistence. The lowest possible measurable velocity was below 5 cm/s. The same investigator, using the same equipment and parameters will performe the sonography assessments so as to eliminate any interobserver variation. All exams were carried out between 08:00 and 10:00 a.m. in order to avoid interference of the circadian rhythm (10).
Power Doppler energy is classified into 5 categories according to the sub-endometrial signal area percentage: I (<10%), II (10-25%), III (25-50%), IV (50-75%) and V (>75%).
Statistics Student t test is used for comparing age and body mass index (BMI). The Wilcoxon-Mann-Whitney (WMW) test is used to compare skewed data (PI, RI and ET), whereas the Chi-Square test and Fisher’s exact test are used for categorical data (PDE).
We will use multiple logistic regression model to examine the association of the outcome (PI variability, before and after IUD insertion), categorized in percentile 50 and IUD (LNG-IUS or TCu 380A), age (years), and parity (0,1 or >1) the independent variables. P-value < 0.05 was considered statistically significant. The power calculation before this study protocol required the inclusion of 19 patients for a Pß=80%.
|Study Type ICMJE||Interventional|
|Study Phase||Not Provided|
|Study Design ICMJE||Allocation: Non-Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind
Primary Purpose: Diagnostic
|Intervention ICMJE||Device: intra-uterine device (TCu 380A)|
|Study Arm (s)||Not Provided|
|Publications *||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Completion Date||November 2006|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
|Ages||18 Years to 40 Years|
|Accepts Healthy Volunteers||Yes|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||Brazil|
|NCT Number ICMJE||NCT00489463|
|Other Study ID Numbers ICMJE||IUD vascularization|
|Has Data Monitoring Committee||Yes|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||Hospital de Clinicas de Porto Alegre|
|Information Provided By||Hospital de Clinicas de Porto Alegre|
|Verification Date||January 2006|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP