Frontiers in medicine · 2025
Possible protective role of the absence of Hyrtl's anastomosis in monochorionic pregnancy: exploratory case series.
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Liu Ziling, Ruan Jie
Аннотация
OBJECTIVE: Hyrtl's anastomosis, an intra-arterial shunt, serves a protective function in singleton placentas. Our team previously documented a case of a monochorionic (MC) twin placenta lacking Hyrtl's anastomosis. However, research on the impact of absent Hyrtl's anastomosis in twin placentas remains limited.
METHODS: In the present study, we perfused over 70 cases of MC placentas and identified three additional cases exhibiting the same characteristics.
RESULTS: The absence of Hyrtl's anastomosis was found to be present in two cases with severe placental territory discordance and one case of a MC triamniotic pregnancy with reversed arterial perfusion sequence, all of which resulted in uneventful pregnancy courses.
CONCLUSION: The absence of Hyrtl's anastomosis appears to have a protective effect in MC placentas, contrary to its effect in singleton placentas.
METHODS: In the present study, we perfused over 70 cases of MC placentas and identified three additional cases exhibiting the same characteristics.
RESULTS: The absence of Hyrtl's anastomosis was found to be present in two cases with severe placental territory discordance and one case of a MC triamniotic pregnancy with reversed arterial perfusion sequence, all of which resulted in uneventful pregnancy courses.
CONCLUSION: The absence of Hyrtl's anastomosis appears to have a protective effect in MC placentas, contrary to its effect in singleton placentas.