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The incidence of leftover placenta after vaginal delivery is between 0.1% and 3.3%, with a maternal mortality of up to 10% reported. The traditional management is ultimately the manual removal of the retained placenta (MROP) in the operating room. However, MROP itself increases the risk of further bleeding, postpartum infection, uterine perforation and inversion of the uterus. In a preliminary study with a small cohort, the "Windmill Technique" has already been successfully tested.
The Windmill technique of placenta development for the management of the retained placenta involves the application of a continuous 360-degree umbilical traction force with centripetal rotation in such a way that it runs at the level of the introitus perpendicular to the direction of the birth canal.
The aim of this prospective randomized study is to compare the Windmill placental development technique with traditional placental development strategies. It also analyzes the need to carry out MROP in both groups.
The primary objective of the study is to compare the success rate of removing the placenta in retained placenta pregnancies between the Windmill technique and the control group. Based on this objective, we expected the difference of success rate between groups of 30% (from the previous study, the success rate of the Windmill technique was 86%]. The sample size of 35 participants per group will be required to provide 90% power at a 0.05 two-sided significance level.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Windmill group 30 Mins | Experimental | In the Windmill Group, the Windmill technique is carried out after 30 minutes. The windmill technique of the umbilical cord for placental development is performed by a trained obstetrician or midwife with a doctor presence. In a frustrated attempt to develop placenta using the Windmill technique, a manual removal is performed according to the clinic standard. |
|
| Control Group | Active Comparator | In the control group, after a total of 45 minutes of unsuccessful application of the traditional and customary measures, the Windmill technique is used. If unsuccessful, a manual placenta removal is performed according to hospital Standards. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Windmill at 30 Minutes | Other | The so-called windmill technique of placenta development for the management of the retained placenta involves the application of a continuous 360-degree umbilical traction force with centripetal rotation in such a way that it runs at the level of the introitus perpendicular to the direction of the birth canal. This rotation around a 360-degree traction plane is repeated slowly and continuously with a motion that resembles the motion of the wings of a windmill until the placenta can be safely delivered. |
| Measure | Description | Time Frame |
|---|---|---|
| Delivery of the placenta | Successful delivery of the placenta | At the end of delivery |
| Measure | Description | Time Frame |
|---|---|---|
| Need for Manual Removal of Placenta | Operative manual removal of placenta | At the end of delivery |
| Blood loss | Estimated and Calculated Blood Loss |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Larry Hinkson | Contact | 004930450664710 | Larry.Hinkson@charite.de |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Charité University Hospital | Recruiting | Berlin | 10117 | Germany |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28591673 | Background | Hinkson L, Suermann MA, Hinkson S, Henrich W. The Windmill technique avoids manual removal of the retained placenta-A new solution for an old problem. Eur J Obstet Gynecol Reprod Biol. 2017 Aug;215:6-11. doi: 10.1016/j.ejogrb.2017.05.028. Epub 2017 Jun 1. |
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The primary objective of the study is to compare the success rate of removing the placenta in retained placenta pregnencies between the Windmill technique and the control group. Based on this objective, we expected the difference of success rate between groups of 30% (from the previous study, the success rate of the Windmill technique was 86%. The sample size of 35 participants per group will be required to provide 90% power at a 0.05 two-sided significance level.
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The primary objective of the study is to compare the success rate of removing the placenta in retained placenta pregnencies between the Windmill technique and the control group. Based on this objective, we expected the difference of success rate between groups of 30% (from the previous study, the success rate of the Windmill technique was 86% . The sample size of 35 participants per group will be required to provide 90% power at a 0.05 two-sided significance level.
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|
| Windmill at 45 Minutes | Other | The so-called windmill technique of placenta development for the management of the retained placenta involves the application of a continuous 360-degree umbilical traction force with centripetal rotation in such a way that it runs at the level of the introitus perpendicular to the direction of the birth canal. This rotation around a 360-degree traction plane is repeated slowly and continuously with a motion that resembles the motion of the wings of a windmill until the placenta can be safely delivered. |
|
| At the end of delivery |