INSERCION BAJA DE PLACENTA PDF

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Oct 17,

Author:Samunos Majind
Country:Netherlands
Language:English (Spanish)
Genre:Sex
Published (Last):23 September 2008
Pages:278
PDF File Size:7.46 Mb
ePub File Size:14.87 Mb
ISBN:518-1-87782-330-6
Downloads:90352
Price:Free* [*Free Regsitration Required]
Uploader:Dulabar



Placenta previa refers to implantation of the placenta near the internal cervical os. There are different types of placenta previa: partial placenta previa, complete or total placenta previa, marginal placenta previa and low insertion placenta, which are explained below.

This is one of the most common obstetric complications, and it can cause postpartum hemorrhage during labor. The incidence of placenta previa is 1 in to 1 in pregnant women with gestational age greater than 20 weeks, the frequency of occurrence with deliveries increases, thus for the nulliparous women, the incidence is 0.

The causes of abnormal implantation of the placenta are not really known, but hypotheses are established according to uterine and placental causes. These alter the endometrium or myometrium causing an abnormal implantation of the placenta, such as:.

The uterine causes that generate the low implantation of the placenta, as for example the antecedent of cesarean section, indicates that the placenta during the gestation process migrates to places of higher arterial perfusion, but when there are scars, it does not allow the migration of the placenta because of the low levels of irrigation that exist in it.

They are those that favor the increase in the size of the placental cake or the implantation surface. A reduction in uterine-placental oxygen promotes the increase in its surface generating an obstruction of the internal cervical os. These placental causes are:. It is normal for the placenta to move as the uterus stretches and grows. At the beginning of pregnancy, it is normal for the placenta to be inserted into the lower part of the uterus or known to patients as the womb.

But as the pregnancy progresses, the placenta moves to the top. During the third trimester, the placenta should be close to the fundus, so that the internal cervical os is clear for delivery.

The lower segment is an inadequate region for placental insertion, because it has a thinner endometrium, the decidua is much thinner, altering its vasculature, leading to a more flat and irregular conformation of the placenta, forming partitions between cotyledons, which is associates that the placenta already developed invades the myometrium, the latter is known as placental accreta; The lower segment of the uterus does not contain the same amount of muscle fibers and collagen fibers predominate, there is greater distension and less capacity to collapse the capillaries, generating alterations in the normoinsertion and functioning of the cord, which together trigger lesions in both the fetus and in the mother.

There are 4 types of placenta previa that differ depending on the relationship they have with respect to the hole in the cervix. Although in many texts it is not considered within the classification of placenta previa, it can cause the same complications as marginal placenta previa in childbirth, so it should not be forgotten about its existence. Phenomenon called placental migration. This pathology is part of the group of diseases that make up the hemorrhages of the Third Trimester of Pregnancy.

Within the clinic of pregnancy with placenta previa the following symptoms can be highlighted:. This is a vaginal bleeding that occurs in the third trimester of pregnancy, which is characterized by not producing pain, intermittent and bright red. Related to the weeks of gestation has been found relationship; that the bleeding that occurs before week 28 corresponds to a total occlusion of the placenta and a third of the bleeding occurs in labor. A placental murmur can be heard in the hypogastrium.

To confirm the diagnosis, a transvaginal ultrasound should be performed, which evidences the low implantation of the placenta. This examination is considered the Standard GOLD since obstetric ultrasound presents many limitations maternal obesity, fetal situation, etc. Ultrasound of occlusive or partial placenta previa Placenta Previa Total occlusive Overlap of more than 2 cm. The treatment must take into account the degree of bleeding, gestational age, fetal vitality, associated pathologies and whether or not there is labor.

Evidence that the treatment can be of two types conservative and of urgency. Maternal: After prenatal bleeding from placenta previa, maternal hemorrhage, shock and death may occur. The patient may also die as a result of hemorrhage during or after childbirth Red Code , due to operative trauma, infection, embolism or placenta accreta.

The fetus may die as a result of intrauterine anoxia or injury during birth, infant respiratory distress syndrome, hypothermia, hydroelectrolyte alteration, metabolic disturbance, and increased likelihood of neonatal sepsis.

Restriction of intrauterine growth IUGR. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies.

It is mandatory to procure user consent prior to running these cookies on your website. Contenido 1 What is placenta previa? Me gusta esto: Me gusta Cargando Deja tu comentario Cancelar respuesta. Esta pagina usa cookies. Cerrar Privacy Overview This website uses cookies to improve your experience while you navigate through the website.

Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.

Necesarias Siempre activado. No necesarias No necesarias. Por favor, vuelve a intentarlo.

MACKIE 1402 VLZ PRO PDF

Placenta prèvia

Placenta previa refers to implantation of the placenta near the internal cervical os. There are different types of placenta previa: partial placenta previa, complete or total placenta previa, marginal placenta previa and low insertion placenta, which are explained below. This is one of the most common obstetric complications, and it can cause postpartum hemorrhage during labor. The incidence of placenta previa is 1 in to 1 in pregnant women with gestational age greater than 20 weeks, the frequency of occurrence with deliveries increases, thus for the nulliparous women, the incidence is 0. The causes of abnormal implantation of the placenta are not really known, but hypotheses are established according to uterine and placental causes. These alter the endometrium or myometrium causing an abnormal implantation of the placenta, such as:. The uterine causes that generate the low implantation of the placenta, as for example the antecedent of cesarean section, indicates that the placenta during the gestation process migrates to places of higher arterial perfusion, but when there are scars, it does not allow the migration of the placenta because of the low levels of irrigation that exist in it.

EL HUESPED AMPARO DAVILA PDF

Placenta praevia

It is a common cause of antepartum hemorrhage. Placenta previa is a potentially life-threatening condition for both mother and infant. As such, antenatal diagnosis is essential to adequately prepare for childbirth. The term "placenta previa" covers a spectrum of anomalies and results from the partial or total insertion of the placenta into the lower uterine segment. Previa is divided into four grades depending on the relationship and distance to the internal cervical os:. Due to placental trophotropism , the diagnosis of a placenta previa is not usually made before 20 weeks. During the 'routine' 18 to week morphology scan, the distance between the lower edge of the placenta and the internal os should be measured.

ANTIBIOTIK GOLONGAN MAKROLIDA PDF

.

FINKIELKRAUT LA DERROTA DEL PENSAMIENTO PDF

.

Related Articles