Vasa previa. Medical search. Frequent questions

Vasa previa refers to the presence of large placental vessels crossing the cervical opening ahead of the presenting part. (medicalalgorithms.com)
These can be loosely defined as peripartum in nature, such as placental abruption, vasa praevia (a condition where fetal blood vessels cross the external orifice of the uterus and often rupture), or a hypoxic-ischemic event at birth ( 2 , 3 ). (frontiersin.org)
Placental attachment at the incision site of a previous cesarean section significantly increased the incidence of complete placenta previa and PAS disorders compared with placental attachment at a site without incision, but did not significantly influence pregnancy outcomes. (edu.au)
Placental attachment to the anterior wall was an independent risk factor for postpartum hemorrhage in patients with placenta previa. (edu.au)
CONCLUSION: The site of placental attachment in patients with placenta previa has an important influence on the pregnancy outcome. (edu.au)
Complete placenta previa ultrasound biometry and surgical outcomes [4] "To evaluate the relationship between surgical outcomes and ultrasound measurement of placental extension beyond the cervical os in women with placenta previa. (edu.au)
In this document, we focus on placenta previa, morbidly adherent placentation, vasa previa, placental abruption, cesarean scar pregnancy, intra-abdominal pregnancy, and uterine rupture as important sources of antenatal bleeding. (brightoncollaboration.org)
The most important causes are placental abruption (most common), placenta previa Placenta Previa Abnormal placentation in which the placenta implants in the lower segment of the uterus (the zone of dilation) and may cover part or all of the opening of the cervix. (lecturio.com)

So, found out that I likely have Vasa previa today, as I have blood vessels sitting extremely close to my cervix. (babycenter.com)
OB's office called just after noon and told me to go straight to L&D. The vasa previa isn't only next to my cervix, it runs down and over my cervix. (babycenter.com)
In vasa previa, membranes that contain blood vessels connecting the umbilical cord and placenta lie across or near the opening of the cervix-the entrance to the birth canal. (msdmanuals.com)
In vasa previa, some of these blood vessels are located in the membranes that surround the fetus, in the area between the fetus and the opening of the cervix. (msdmanuals.com)
In vasa previa, membranes that contain blood vessels from the fetus to the placenta cross the entrance to the birth canal (the opening of the cervix). (msdmanuals.com)
This is especially true when these vessels are located close to the cervix, as they might be if you also have vasa previa. (whattoexpect.com)
Vasa previa occurs when one or more of the blood vessels from the umbilical cord or placenta cross the cervix. (wkw.com)
Pregnancies where the placenta attaches to the lower portion of the uterus, near your cervix (placenta previa). (clevelandclinic.org)
Pregnancies where unprotected blood vessels from the umbilical cord travel across your cervix ( vasa previa ). (clevelandclinic.org)
With vasa previa, the umbilical cord attaches to membranes that are close to your cervix. (clevelandclinic.org)
Placenta previa is a condition in which the placenta is near or over the cervix. (medical-abortions.com)
Placenta previa occurs when the placenta covers or partially covers your cervix, blocking the path of blood flow from your uterus to your baby. (medical-abortions.com)

2007. Vasa praevia after ivf: Should there be guidelines? (vasaprevia.com)
2006. Vasa praevia: A lethal threat to the fetus. (vasaprevia.com)
1998. Ante- and intrapartum diagnosis of vasa praevia in singleton pregnancies by colour coded doppler sonography. (vasaprevia.com)
2007. Prenatal ultrasound diagnosis of vasa praevia and analysis of risk factors. (vasaprevia.com)
1989. Vasa praevia: Another cause for concern in in vitro fertilization pregnancies. (vasaprevia.com)
2010. The cost-effectiveness of targeted or universal screening for vasa praevia at 18-20 weeks of gestation in ontario. (vasaprevia.com)
Placenta praevia or vasa praevia refers to the placenta or fetal blood vessels, respectively, covering or being located close to the opening of the uterus. (wikipedia.org)
Vasa praevia occurs in about 0.6 per 1000 pregnancies. (wikipedia.org)
Published Medical Journals & Articles on Vasa Praevia. (vasapraevia.co.uk)
Incidence of and risk indicators for vasa praevia: a systematic review , Ruiter et al, BJOG, Volume 123, Issue 8, p.1278-1287. (vasapraevia.co.uk)
https://radiopaedia.org/articles/vasa-praevia-1 Dr Yuranga Weerakkody◉et al. (myesr.org)

Vasa previa occurs when fetal blood vessels that are unprotected by the umbilical cord or placenta run through the amniotic membranes and traverse the cervical os. (exxcellence.org)
Vasa previa is a condition in which fetal blood vessels are located on fetal membranes within 2 cm of the internal cervical os. (bvsalud.org)
Vasa previa is defined as aberrant fetal blood vessels crossing over or within 2 cm of the internal cervical os. (myesr.org)

Umbilical cord abnormalities are numerous, ranging from false knots, which have no clinical significance, to vasa previa, which often leads to fetal death. (medscape.com)
Vasa previa has been classified into two types Type 1, in which vessels connect a velamentous umbilical cord to the placenta , and Type 2, in which vessels connect the lobes of a bilobed placenta or the placenta to a succenturiate lobe. (bvsalud.org)
You may also be at risk if your baby's umbilical cord doesn't connect properly to the placenta, or if you have other placenta problems like placenta previa. (wkw.com)
Vasa Previa is a condition where the umbilical vessels are located in the lower segment of the uterus. (medical-abortions.com)

Doctors may suspect vasa previa when ultrasonography, routinely done earlier in the pregnancy, detects certain abnormalities in the placenta or when the fetus's heart rate is abnormal. (msdmanuals.com)
2006. Prenatal diagnosis of vasa previa through color doppler and three-dimensional power doppler ultrasonography. (vasaprevia.com)
Perform transvaginal ultrasonography with color and pulsed doppler to rule out vasa previa even if previa/low-lying placenta resolved as risk for vasa previa is increased. (exxcellence.org)
Difficulties were associated with diagnosing two out of the 14 cases of vasa previa using routine transvaginal ultrasonography (TVUS). (bvsalud.org)
However, with the technologic advances in ultrasonography, the diagnosis of placenta previa is commonly made earlier in pregnancy. (medscape.com)

The exact frequency of vasa previa is difficult to determine, but it probably occurs in 1 in 1,500 to 5,000 pregnancies. (exxcellence.org)
All original research studies reporting on 5 or more pregnancies with vasa previa were included. (mcmaster.ca)
RESULTS: We included 21 studies that reported 428 pregnancies with vasa previa of 1,027,918 deliveries (0.46 cases of vasa previa per 1000 deliveries). (mcmaster.ca)
CONCLUSION: Vasa previa affects 0.46 cases per 1000 pregnancies. (mcmaster.ca)
Given the high prevalence of prenatally detectable risk factors in affected pregnancies, the cost-effectiveness of screening strategies for vasa previa either in isolation, using a risk factor-based approach, or universally, in tandem with cervical-length screening using transvaginal ultrasound, should be revisited. (mcmaster.ca)
About 6% of pregnancies with velamentous cord insertion also have a condition called vasa previa. (clevelandclinic.org)
In the late third trimester, placenta previa is highly uncommon, occurring in just one out of every 200 pregnancies. (theasianparent.com)
Placenta previa is frequently reported to occur in 0.3-0.5% of all US pregnancies. (medscape.com)

If left untreated, placenta previa can lead to postpartum hemorrhage (PPH), which occurs when blood leaks out of your uterus after giving birth. (medical-abortions.com)
When the placenta connects to the wall of the uterus ower than normal it is called placenta previa. (drsteverad.com)

Vasa previa is a problem with the blood vessels in the placenta. (msdmanuals.com)
Fetal hemorrhage, exsanguination, or even death may result with rupture of vasa previa vessels whether spontaneous or during artificial rupture of membranes. (exxcellence.org)
Some cases of vasa previa due to a succenturiate lobe (type II) may be treated antenatally with laser ablation of the vessels, but this procedure may not be available in many locations. (exxcellence.org)
All 5 Type 3 cases had only one fetal aberrant vessel of vasa previa , while 6 out of 9 Type 1 cases (67%) had two or more aberrant vessels. (bvsalud.org)

Effect of site of placentation on pregnancy outcomes in patients with placenta previa [3] "This retrospective study included 678 cases of placenta previa. (edu.au)
Placenta previa is an obstetric complication that classically presents as painless vaginal bleeding in the third trimester secondary to an abnormal placentation near or covering the internal cervical os. (medscape.com)

Placenta previa - Usually painless vaginal bleeding. (logicalimages.com)
Vasa previa - Also usually painless vaginal bleeding with rapid fetal compromise and in utero demise if delivery does not occur expeditiously. (logicalimages.com)
However, a bleeding placenta previa, which might be painless, is a medical emergency that has to be treated right away. (theasianparent.com)
A leading cause of third-trimester hemorrhage, placenta previa presents classically as painless bleeding. (medscape.com)

2001. Prenatal sonographic diagnosis of vasa previa: Ultrasound findings and obstetric outcome in ten cases. (vasaprevia.com)
A follow-up ultrasound, usually done with a device inserted into your vagina, can confirm that you have vasa previa. (msdmanuals.com)
If placenta previa or low-lying placenta is diagnosed at mid-trimester ultrasound, perform a follow-up ultrasound at 32 weeks gestation (or sooner as needed). (exxcellence.org)

Placenta previa invading the lower uterine segment and covering the cervical os. (medscape.com)

1993. Antenatal diagnosis of vasa previa by transvaginal color doppler sonography. (vasaprevia.com)
A transvaginal image showing vasa previa. (myesr.org)

2005. Vasa previa: Prenatal diagnosis and evaluation with 3-dimensional sonography and power angiography. (vasaprevia.com)
1996. Prenatal diagnosis of vasa previa presenting as amniotic band. (vasaprevia.com)
Vasa previa can be successfully managed through appropriate diagnosis, preparation and readiness for surgery. (exxcellence.org)
Vasa previa: diagnosis and management. (exxcellence.org)
Most Type 3 cases may present with only one fetal aberrant vessel of vasa previa and fewer risk factors , suggesting that the diagnosis of vasa previa may be more challenging in Type 3 cases than in the other types. (bvsalud.org)
Vasa previa with a venous vasa previa needs to be considered because of the difficulties associated with an antenatal diagnosis due to unclear imaging of the vasculature or the lack of specific color Doppler flow patterns. (bvsalud.org)
Our study has shown improvement of 38% (from 50% to 88%) in compliance of the sonographers in assessment of vasa previa by raising awareness about the new guidelines and regarding the importance of diagnosis of vasa previa and impact on its management. (myesr.org)

2010. Third trimester fetoscopic laser ablation of type ii vasa previa. (vasaprevia.com)

A complete previa is defined as complete coverage of the cervical os by the placenta. (medscape.com)

Because of the inherent risk of hemorrhage, placenta previa may cause serious morbidity and mortality to both the fetus and the mother. (medscape.com)

In these cases, the aberrant fetal vessel of vasa previa was only one vein with a thin wall that was not clearly visualized by gray-scale TVUS as well as slow flow that was easily misread by color -Doppler. (bvsalud.org)

Two types of vasa previa occur: type 1 is associated with a velamentous cord insertion, and type II with succenturiate or multilobed placentae. (exxcellence.org)

Pregnancy complications, such as vasa previa, are problems that occur only during pregnancy. (msdmanuals.com)

These cases were ultimately diagnosed as vasa previa based on non- pulsatile flow detected by color and pulsed Doppler. (bvsalud.org)

The present study investigated the incidence of Type 3 vasa previa and elucidated differences in clinical and ultrasonographical characteristics between traditional types and Type 3. (bvsalud.org)
Advanced maternal age has also been strongly associated with an increasing incidence of placenta previa. (medscape.com)

If vasa previa does not cause any complications, doctors often plan to deliver the baby between 34 to 37 weeks of pregnancy. (msdmanuals.com)

Certain conditions associated with vasa previa such as low-lying placenta, multi-fetal gestation, IVF or presence of an accessory lobe of the placenta should raise suspicion and warrant further investigation. (exxcellence.org)

A meta-analysis showed that the rate of placenta previa increases with increasing numbers of cesarean deliveries, with a rate of 1% after 1 cesarean delivery, 2.8% after 3 cesarean deliveries, and as high as 3.7% after 5 cesarean deliveries. (medscape.com)

AUDIT (MARCH 2020) RE-AUDIT (MARCH 2021) COMPLIANCE RATE 50% 85% Recommendations/Action Plan:Presentation of audit and re-audit findings and discussion regarding vasa previa has been performed in our department.To continue to improve our efficacy in assessment of vasa previa by regular discussion with sonographers and performing further re-audits. (myesr.org)

Vasa previa may cause massive bleeding in the fetus and mother when the membranes around the fetus rupture, usually just before labor starts. (msdmanuals.com)

Apparently, Vasa previa can cause stillbirth. (babycenter.com)

If a woman has vasa previa, doctors check the fetus's heart rate frequently after 28 weeks of pregnancy to determine whether the fetus is in distress. (msdmanuals.com)

What are the symptoms of vasa previa? (msdmanuals.com)

Historically, there have been three defined types of placenta previa: complete, partial, and marginal. (medscape.com)
More recently, these definitions have been consolidated into two definitions: complete and marginal previa. (medscape.com)
If the leading edge of the placenta is less than 2 cm from the internal os, but not fully covering, it is considered a marginal previa (see the following image). (medscape.com)

Vasa previa is present in about 1 in 2,500 to 5,000 deliveries. (msdmanuals.com)
Among 8,723 deliveries, there were 14 cases (0.16%) of vasa previa , all of which were diagnosed prenatally by US, not after vaginal delivery or CS. (bvsalud.org)

OBJECTIVE: To systematically review published literature and calculate the prevalence of vasa previa and its known risk factors. (mcmaster.ca)
If you have placenta previa and are planning on having babies in the future, you should talk with your doctor about what steps you should take to reduce your risk for PPH. (medical-abortions.com)

Clinical characteristics of a novel 'Type 3' vasa previa: case series at a single center. (bvsalud.org)

Differences between the different placenta previa positions and pregnancy outcomes were compared using the chi-square and independent t tests. (edu.au)

The significance of race in having a role in placenta previa is somewhat controversial. (medscape.com)

This rare and often treatable pregnancy condition was brought to my attention by Carol Prentice, on behalf of the Int'l Vasa Previa Foundation. (natural-parenting.com)

There are two types of vasa previa. (myesr.org)

These cases were recently proposed as Type 3 vasa previa . (bvsalud.org)
This was a single-center observational study using a cohort of all vasa previa cases between January 2010 and April 2020. (bvsalud.org)
The present results suggest that Type 3 may account for a large proportion of vasa previa cases. (bvsalud.org)

Anatomy4

Diseases10

Analytical, Diagnostic and Therapeutic Techniques and Equipment9

Phenomena and Processes9

Health Care2

Placental8

Cervix12

Praevia11

Fetal blood vessels3

Umbilical4

Ultrasonography5

Pregnancies8

Uterus2

Vessels4

Placentation2

Painless4

Ultrasound3

Uterine1

Transvaginal2

Diagnosis7

Third trimester1

Cervical1

Hemorrhage1

Aberrant fetal1

Velamentous cord inse1

Pregnancy complications1

Color and pulsed1

Incidence2

Complications1

Lobe1

Cesarean delivery1

20211

Membranes1

Stillbirth1

Fetus1

Symptoms1

Marginal3

Deliveries2

Risk2

Clinical1

Outcomes1

Significance1

Condition1

Types1

Cases3