Abnormal Pregnancy Part -1 | Midwifery & Gynaecological Nursing | NORCET 6 2024

Name: Abnormal Pregnancy Part -1 | Midwifery & Gynaecological Nursing | NORCET 6 2024
Uploaded: 2024-01-02T05:30:13.000Z
Duration: 2 h 6 min 57 s

Introduction to Midwifery and Gynecological Nursing

Overview of the Lecture Series

The session welcomes participants to the 23rd lecture on midwifery and gynecological nursing, following 22 previous lectures.

Emphasis is placed on normal pregnancy, with a focus on abnormal cases from a nursing perspective.

Focus Areas for Today's Class

The main topics include multiple pregnancies, ectopic pregnancy, hydatidiform mole, abortion, and medical termination of pregnancy (MTP). Important questions from past exams will be discussed.

The aim is to cover these topics efficiently within two lectures due to time constraints in the overall syllabus.

Understanding Multiple Pregnancies

Definition and Risks

Multiple pregnancies are classified as high-risk pregnancies requiring closer observation compared to normal pregnancies. More frequent visits and investigations are necessary for high-risk cases.

Types of Multiple Pregnancies

A multiple pregnancy occurs when more than one fetus is present in the uterus at a time; examples include twins (two fetuses), triplets (three), and quadruplets (four). Twins are noted as the most common type of multiple pregnancy.

Incidence and Factors Influencing Multiple Pregnancies

Helen's Rule

Discussion includes Helen's rule regarding twin incidence ratios: approximately 1 in 80 pregnancies results in twins; for triplets, it’s calculated as 1 in 80 squared; for quadruplets, it’s cubed. This rule helps understand the statistical likelihood of multiple births.

Contributing Factors

Factors such as hot climates or ovulation-inducing drugs can increase chances of multiple pregnancies; conditions like PCOD may also lead to higher incidences when treated with fertility medications like Clomiphene Citrate or through artificial reproductive technologies like IVF.

Types of Twins: Monozygotic vs Dizygotic

Key Differences Explained

Twin types are categorized into monozygotic (identical) twins formed from one fertilized egg that splits into two embryos versus dizygotic (fraternal) twins resulting from two separate eggs fertilized by different sperm cells. Understanding this distinction is crucial for nursing practice related to prenatal care and monitoring during pregnancy.

Understanding Twin Types and Their Development

Fertilization and Twin Formation

The process of fertilization can lead to the formation of two fetuses from two separate ova, resulting in what is known as dizygotic twins.

When one ovum is fertilized by a single sperm, it results in monozygotic twins. In contrast, dizygotic twins arise from two different ova being fertilized by two different sperms.

Commonality of Twin Types

In 80% of cases, the most common type of twin pregnancy is dizygotic twins. This contrasts with monozygotic twins which occur in about 20% of cases.

Identical (monozygotic) twins appear very similar and share the same sex, while fraternal (dizygotic) twins are genetically distinct and may not resemble each other.

Characteristics of Twins

Identical twins will always have the same sex due to their shared genetic material; however, fraternal twins can be either the same or different sexes.

The physical resemblance between identical twins is strikingly similar, whereas fraternal twins do not necessarily look alike.

Placenta and Amniotic Sac Differences

The number of placentas and amniotic sacs varies: monozygotic twins may share one placenta but have separate amniotic sacs depending on when division occurs post-fertilization.

If division happens within 72 hours after fertilization, it typically leads to a single placenta with two amniotic sacs (dichorionic-diamniotic).

Blood Grouping Considerations

For identical (monozygotic) twins sharing a placenta, blood transfusions between them do not require cross-matching due to their genetic similarity.

However, for fraternal (dizygotic) siblings or if there’s uncertainty about zygosity, blood group compatibility testing becomes necessary before any transfusion.

Fingerprint Differences

Despite identical genetics in monozygotic twins leading to many similarities, they still possess unique fingerprints that differentiate them physically.

Summary on Monozygotic Twins Division Timing

The timing of zygote division significantly influences twin types: divisions occurring within 72 hours yield specific structures while later divisions result in more complex arrangements.

What Happens After 14 Days of Division in Twins?

Understanding Twin Development

The discussion begins with the implications of division occurring after 14 days, leading to the formation of conjoined twins. It highlights that both fetuses become interconnected, sharing a single amniotic sac and chorion.

The speaker explains that when division occurs post-14 days, parts of the embryos may remain identical. For instance, if one fetus develops a head before division, both will share that characteristic.

This type of twin is referred to as "conjoined twins" or "attached twins," indicating their physical connection due to shared development stages.

Types of Conjoined Twins

The most common form involves monozygotic (identical) twins where division happens between 4 to 12 days, resulting in two amniotic sacs but one chorion. This condition is termed "di-amniotic monochorionic."

If division occurs later (8 to 14 days), it results in a single amniotic sac and chorion without any physical attachment between the fetuses. One twin may act as a donor while the other receives nutrients.

Complications Associated with Conjoined Twins

A significant complication discussed is Twin-to-Twin Transfusion Syndrome (TTTS), which arises from shared blood supply issues among conjoined twins.

The risk of cord entanglement increases significantly due to shared membranes; this can lead to severe complications for both fetuses.

Prognosis and Survival Rates

The prognosis for conjoined twins varies widely; many do not survive past infancy due to complications like TTTS and cord entanglement.

Understanding these conditions is crucial for medical professionals dealing with high-risk pregnancies involving multiple gestations.

Types of Conjunction in Twins

Various types of conjunction are identified using mnemonic devices:

T: Thoracopagus

O: Omphalopagus

P: Parapagus

C: Craniopagus

Specific examples include craniopagus (head-to-head connection), omphalopagus (abdominal connection), and thoracopagus (chest connection).

Clinical Features in Multiple Pregnancies

Clinical features such as increased fundal height and abdominal girth are noted as indicators during examinations for multiple pregnancies.

Plasma volume increases more than blood volume compared to singleton pregnancies, highlighting physiological changes during twin gestation.

Understanding Twin Pregnancy Management

Key Ultrasound Signs in Twin Pregnancies

The "Twin Peak Sign" or "Lada Sign" is crucial for identifying multiple pregnancies via ultrasound.

In cases of multiple twins, two gestational sacs are typically observed during the initial ultrasound examination.

Clinical Features and Management Considerations

Increased plasma volume is a significant clinical feature in twin pregnancies compared to normal pregnancies.

Delivery mode depends on the arrangement of twins; if both babies present cephalic, a normal vaginal delivery is possible.

If one baby presents breech while the other is cephalic, a cesarean section may be necessary.

Complications Associated with Twin Deliveries

The most common complication in twin deliveries is preterm birth, which occurs in 50% of cases.

Other complications include postpartum hemorrhage (PPH), premature rupture of membranes (PROM), and polyhydramnios.

Active Management During Delivery

Early cord cutting is practiced during twin deliveries to minimize blood loss and prevent fetal distress in the second baby.

Exploring Ectopic Pregnancy

Definition and Types of Ectopic Pregnancy

Ectopic pregnancy occurs when implantation happens outside the uterine cavity, leading to potential complications.

The most common type of ectopic pregnancy is tubal ectopic pregnancy, where implantation occurs within the fallopian tube.

Less Common Sites for Ectopic Implantation

Other sites for ectopic pregnancies include abdominal cavities, cervical regions, and ovaries; however, these occurrences are rare.

This structured summary provides an overview of key concepts related to twin pregnancy management and ectopic pregnancy based on the provided transcript. Each point links back to specific timestamps for further reference.

Understanding Ectopic Pregnancy

Survival Rates in Ectopic Pregnancy

The survival rate of fetuses is highest in the interstitial region, where they receive nutrition from the uterine cavity and walls, allowing for prolonged growth.

Common Sites for Ectopic Pregnancy

The ampullary region has the highest chance of tubal abortion, while the fimbrial end also experiences significant rates of abortion.

Causes of Ectopic Pregnancy

Pelvic Inflammatory Disease (PID) is a common cause of ectopic pregnancy, leading to complications such as scarring or blockage in the fallopian tubes.

Salpingitis is identified as one of the most common types associated with ectopic pregnancies. Other causes include failure of intrauterine devices (IUDs), previous ectopic pregnancies, trauma to the tubes, and surgeries.

Mechanism Behind Implantation Issues

If fertilization occurs but implantation cannot proceed due to blockages or trauma in the fallopian tubes, it can lead to an ectopic pregnancy.

Clinical Features and Symptoms

Key clinical features of ectopic pregnancy include abdominal pain, vaginal bleeding, and signs indicating shock if there’s internal bleeding due to rupture. These are critical symptoms that need immediate attention.

Diagnosis and Management Strategies

Ultrasound is considered a safe diagnostic tool for confirming ectopic pregnancies. Other methods include hormonal tests like hCG levels.

Management strategies depend on gestational size: medical management with methotrexate for sizes less than 4 cm; surgical intervention for larger sizes.

Surgical Management Approaches

Surgical management can be conservative (preserving the tube) or non-conservative (removing it). Techniques include salpingostomy or salpingectomy based on whether preservation is possible.

Healing Processes Post-Surgery

Healing by secondary intention involves leaving incisions open without stitches after removing products from conception. In contrast, primary intention healing involves stitching up after removal.

Understanding Hydatidiform Mole and Its Management

Complications of Ectopic Pregnancy

The most common preference is to avoid complications such as tubal adenoma, which can lead to recurrent ectopic pregnancies. This may also result in infertility if not managed properly.

Surgical and Medical Management

Salpingostomy is a procedure where the tube is opened, the product is removed, and then stitched up for healing by primary intention. If left untreated, it may heal by secondary intention. This approach aims to conserve the fallopian tubes.

Non-conservative management includes both surgical and medical interventions tailored to address specific cases effectively.

Definition of Hydatidiform Mole

A hydatidiform mole involves abnormal proliferation of trophoblastic tissue; understanding its pathophysiology is crucial for diagnosis and treatment planning. Diagrams are often used for clarity in explaining this condition.

Structure of Blastocyst

The blastocyst consists of an inner cell mass surrounded by trophoblast cells, which play a significant role in implantation and development during early pregnancy. Understanding this structure aids in recognizing abnormalities like hydatidiform moles.

Types of Moles: Complete vs Partial

There are two types of hydatidiform moles: complete (no fetal parts present) and partial (some fetal parts present). The distinction between benign conditions (partial mole) and malignant conditions (complete mole) is critical for treatment decisions. If untreated, a benign condition can progress to choriocarcinoma, particularly related to placental issues.

Clinical Features on Ultrasound

Diagnosis via ultrasound reveals characteristic features such as "snowstorm appearance," indicating extensive vesicular structures filling the uterine cavity—this finding is essential for clinical assessment and management strategies.

Symptoms include vaginal bleeding accompanied by grape-like clusters expelled from the vagina, which are significant indicators during examination processes for potential hydatidiform moles or other gestational trophoblastic diseases.

Hydatidiform Mole and Management

Understanding Hydatidiform Mole

Hydatidiform mole is indicated by vaginal bleeding, with absent fetal heart sounds due to the absence of a fetus.

Fundal height increases more than gestational age in cases of hydatidiform mole, which is crucial for diagnosis.

The management of choice for hydatidiform mole is termination of pregnancy as soon as it is diagnosed.

Monitoring and Hormonal Changes

After termination, monitoring serum hCG levels is essential since they can rise significantly due to trophoblastic tissue proliferation.

The trophoblastic layer secretes hCG; abnormal proliferation leads to excessive secretion, necessitating careful monitoring.

Weekly monitoring of hCG levels should continue for up to six weeks post-termination, then monthly until three normal values are obtained.

Medication and Patient Advice

Methotrexate is commonly administered in the management protocol for hydatidiform mole.

Patients are advised to avoid pregnancy for one year following treatment to prevent complications.

Abortion: Definitions and Types

Defining Abortion

Abortion refers to the expulsion of the product of conception before 22 weeks or if the weight is less than 500 grams.

The definition emphasizes that any product expelled weighing under 500 grams before 22 weeks qualifies as an abortion.

Causes of Abortion

Chromosomal abnormalities account for approximately 50% of abortion cases; other causes include maternal endocrine issues like hypothyroidism.

Anatomical deformities such as bicornuate uterus or septate uterus can also lead to abortion incidents.

Types of Abortion

Two main types exist: spontaneous (occurring naturally) and induced (medical termination).

Induced abortions can be legal (MTP - Medical Termination of Pregnancy) or illegal; septic abortions may occur from infections.

This structured summary provides a clear overview while linking back to specific timestamps for further reference.

Understanding Types of Abortion and Their Definitions

Overview of Abortion Types

The speaker introduces the topic of spontaneous abortion, emphasizing the need to understand its various types due to time constraints.

Definition of threatened abortion: It refers to a situation where the process of abortion is occurring but does not reach a point where pregnancy continuation is impossible.

Explanation of inevitable abortion: This occurs when the process has started, and it becomes clear that continuing the pregnancy is not possible.

Definition of incomplete abortion: In this case, some parts of the fetus are expelled from the vagina while others remain inside the uterine cavity.

Complete abortion is defined as when all products of conception are expelled through the vagina, leaving an empty uterine cavity.

Key Definitions and Clinical Insights

The speaker discusses cervical os status in different types: closed in inevitable abortions and open in incomplete abortions.

Fundal height correlates with gestational age; during early stages, it equals gestation period but may be less than expected later on.

Ultrasound findings differ based on fetal viability; live fetuses show normal signs while dead fetuses present complications like swelling or laceration.

Management Strategies for Different Abortions

In cases of incomplete abortion, no management is needed if there are no complications; reassurance should be given to mothers about uterine cavity status.

For live fetuses, rest is advised as continuation of pregnancy remains possible; however, if a dead fetus is confirmed, continuation isn't feasible.

Recurring and Habitual Abortions

Discussion on recurrent abortions highlights that three or more consecutive miscarriages classify as habitual abortions.

Identification criteria include brownish vaginal discharge indicative of missed abortions; this can aid in diagnosis during examinations.

Medical Termination of Pregnancy (MTP)

MTP defined as safe and hygienic legal termination by qualified practitioners at recognized facilities.

Historical context provided regarding MTP Act established in 1971 with amendments over time including significant changes made in 2021.

This structured overview captures essential insights into types and definitions related to abortion while providing timestamps for easy reference.

Termination of Pregnancy Guidelines

Overview of MTP Regulations

The termination of pregnancy (MTP) can be performed by a qualified medical practitioner at a recognized place, now allowed up to 24 weeks according to new guidelines, an increase from the previous limit of 20 weeks established in 1975.

Under the new regulations, for pregnancies up to 20 weeks, only one qualified medical practitioner is required. For cases between 20 and 24 weeks, at least two qualified practitioners must be involved.

Indications for MTP

Key indications for MTP include serious maternal health risks such as grade three or four cardiac diseases and psychiatric illnesses where continuation of pregnancy is deemed unsafe by specialists.

Other indications encompass cases involving rape (including minors), contraceptive failure, chromosomal abnormalities in the fetus, structural anomalies, and infections like rubella during the first trimester.

Medical Methods for MTP

Medical methods involve administering mifepristone (200 to 600 mg on day one), followed by misoprostol (200 micrograms every three hours over three doses).

Misoprostol can also be administered sublingually or vaginally depending on medical advice. Oxytocin drips may be used in advanced pregnancies to facilitate abortion.

Surgical Methods for MTP

Surgical methods include vacuum aspiration and dilation & evacuation procedures. These are essential if any fetal parts remain post-abortion to prevent complications like excessive bleeding.

The session concludes with a summary of all discussed aspects regarding abortion management under current guidelines.