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Impact of umbilical cord length on fetal circulatory system by Doppler assessment

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Abstract

Introduction

Numerous studies have revealed the impact of umbilical cord (UC) length on fetal perfusion; abundant data implicate abnormal UC length to neurological delay and subsequent poor prognoses for fetuses and newborns. Indeed, our group previously developed theoretical approximations that contributed to formulas capable of explaining the impact of UC length on cardiac output.

Methods

We performed an observational study that measured the pulsatility index and flow velocity in umbilical arteries. A special Doppler measured proximal and distal indexes in both arteries. After birth, medical staff measured complete UC length. We obtained maternal and neonatal outcomes from clinical records.

Results

Our study enrolled 20 pregnant mothers. We found that flow velocities in the two edges were different: fetal edges exhibited greater velocity in the majority of cases; but, when we compared pressure differentials (ΔP), the pulsatility index was significantly related to umbilical cord length.

Conclusions

Fetal perfusion, welfare, and viability are related to UC function as the conveyor of all fetal volemia. Excessive UC length affects cardiac dynamics and increases peripheral vascular resistance. Further studies could validate routine use of the differential proximal and distal measurements proposed in this article, and their implications in in utero fetal heart function. We also hope that early diagnosis or UC alterations could alert neonatologists and obstetricians to clinical conditions of the fetus.

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Acknowledgements

We wish to thank the Pontificia Universidad JaverianaHospital Universitario San Ignacio in Bogota for its indispensable support and participation in this study. We also extend our thanks to the parents who participated in this study.

Funding

None of the authors have any potential or actual interests relevant to the topics discussed in this manuscript. This study constitutes part of the research project titled, “Fetal Doppler of umbilical arteries in proximal and distal umbilical cord windows: relationship with its abnormal length” (Ppta. ID 7050), financed by the Pontificia Universidad Javeriana through its Hospital Universitario San Ignacio. Bogota, Colombia.

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Authors and Affiliations

Authors

Contributions

OCM: participation in the study conception and design, acquisition of data (case search), patient recruitment, in the literature review and drafting of manuscript; approval of the final version the final version. VW: participation in the literature review, interpretation of the physics model, and drafting of manuscript; approval of the final version. MRA: participation in ultrasound performance, patient recruitment, in the literature review and drafting of manuscript; approval of the final version the final version. PIF: participation in patient recruitment, in the literature review and drafting of manuscript; approval of the final version the final version. SM: participation in patient recruitment, in the literature review and drafting of manuscript; approval of the final version the final version. MI and AS: participation in review of clinical records, in the literature review and drafting of manuscript; approval of the final version the final version. BJE: participation in conception of the general idea and direction of the group.

Corresponding author

Correspondence to Mercedes Olaya-C.

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This study was conducted in accordance with the ethical standards of all applicable national and institutional committees, and the World Medical Association’s Helsinki Declaration.

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Olaya-C, M., Vargas, W., Martinez, R.A. et al. Impact of umbilical cord length on fetal circulatory system by Doppler assessment. J Ultrasound 23, 585–592 (2020). https://doi.org/10.1007/s40477-020-00495-2

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  • DOI: https://doi.org/10.1007/s40477-020-00495-2

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