Abnormal Pregnancy Part -2 | Midwifery & Gynaecological Nursing | NORCET 6 2024

Name: Abnormal Pregnancy Part -2 | Midwifery & Gynaecological Nursing | NORCET 6 2024
Uploaded: 2024-01-08T05:30:04.000Z
Duration: 1 h 58 min 10 s

Midwifery and Gynecological Nursing Lecture 25: Abnormal Pregnancy Part 2

Overview of Today's Class

The focus is on Abnormal Pregnancy, specifically the second part, following a previous discussion on the first part. This lecture aims to cover critical topics relevant for exams, particularly scenario-based questions.

Key areas of study include Antepartum Hemorrhage, Postpartum Hemorrhage, Hypertension in Pregnancy, and Diabetes in Pregnancy. Each topic will be addressed with important points highlighted for better understanding.

Antepartum Hemorrhage (APH)

APH stands for Antepartum Hemorrhage, which refers to any bleeding from the genital tract after the period of viability but before birth. Understanding this definition is crucial as it distinguishes between early-stage bleeding and APH.

The period of viability is defined differently across regions: in India, it is considered to be at 28 weeks; globally, it can range from 20 to 24 weeks depending on developed countries' standards. This distinction impacts how cases are classified and treated.

Causes of Antepartum Hemorrhage

There are three primary causes of APH:

Placental Causes: Includes conditions like Abruptio Placentae and Placenta Previa.

Fetal Causes: Involves issues such as vasa previa leading to fetal blood loss.

Other Causes: Encompasses cervical trauma, tumors, or cancer that may lead to bleeding. Understanding these causes helps in diagnosing and managing APH effectively.

Placenta Previa

Placenta Previa occurs when the placenta attaches low in the uterus, potentially covering the cervix either partially or completely, which poses risks during delivery. It contrasts with normal placental attachment higher up in the uterine segment.

There are two main types discussed:

Low-Lying Placenta: When the placenta is positioned near but not covering the cervix.

Complete Placenta Previa: When it entirely covers the cervical opening, necessitating careful monitoring and management strategies during pregnancy and delivery planning.

This structured approach provides clarity on key concepts related to abnormal pregnancies while ensuring that essential details are easily accessible through timestamps for further review or study purposes.

Understanding Placenta Previa and Its Types

Theories Behind Placenta Previa

Discussion on the "Dropping Down Theory," which suggests that the product of conception is prematurely dropped down due to increased ciliary action in the fallopian tubes.

Issues with the endometrium not being fully prepared for implantation can lead to premature dropping, resulting in placenta previa.

Risk Factors and Definitions

Explanation of risk factors associated with both placenta previa and placental abruption, emphasizing their interrelation.

Definition of placenta previa as a condition where the placenta is located in the lower uterine segment instead of its normal position in the upper uterine segment.

Types of Placenta Previa

Overview of previously recognized four types of placenta previa: Type 1, Type 2, Type 3, and Type 4.

Visual representation provided for understanding how each type presents itself concerning cervical os (opening).

Detailed Breakdown of Types

Description of how different types interact with cervical os:

Type 1: Not covering cervical os.

Type 2: Partially covers when cervical os opens.

Type 3: Completes coverage when closed; partial when open.

Historical vs. Current Classification

Previous terminology included low lying, marginal, incomplete, and complete placenta previa based on positioning relative to cervical os.

Introduction to new guidelines from 2021 simplifying classifications into two main types: low lying and complete.

Clinical Implications

Importance of recognizing dangerous conditions like Type II posterior placenta previa associated with "Stoll's sign."

Clarification that Stoll's sign is typically observed in Type II posterior cases classified as dangerous.

Summary of Key Points

Recap on definitions:

Low lying means presence in lower uterine segment without covering cervical os.

Complete means full coverage regardless if cervical os is open or closed.

Transitioning to Abruption Placenta

Introduction to placental abruption as a condition where there’s premature separation from its normal position. Further details are expected regarding causes and implications.

Understanding Placental Issues in Pregnancy

Types of Placental Separation

Premature separation of the placenta can lead to significant bleeding in females. This condition is referred to as "abruptio placentae," which is the most common type of placental issue.

Abruptio placentae, also known as accidental hemorrhage of the placenta, occurs when the placenta separates prematurely from the uterine wall before delivery.

There are three types of placental previa:

Concealed type

Revealed type

Mixed type

Detailed Types and Characteristics

The concealed type involves blood collecting between the separated placenta and decidua, leading to a specific appearance known as "cobblestone uterus."

In cases where blood collects due to separation but does not exit through the vagina, it results in a cobblestone appearance of the uterus.

The revealed type allows for bleeding that exits through the vagina when separation occurs. This is more common than concealed types.

Clinical Implications and Symptoms

A cobblestone uterus may present with red spots on its surface due to hemorrhage. This symptom can be indicative of concealed types or mixed types where some blood escapes while some remains inside.

In mixed types, there may be both internal collection and external bleeding through the vagina, complicating diagnosis and management.

Risk Factors for Placental Issues

Common risk factors for both placental previa and abruptio placentae include previous history (trauma), large-sized placentas (like in twins), diabetes, smoking, infections, and surgical histories such as cesarean sections.

Specific causes for abruptio placentae include cocaine abuse, hypertension in mothers, abdominal trauma during pregnancy, or conditions like polyhydramnios that increase pressure on the uterus.

Differences Between Placenta Previa and Abruptio Placentae

Understanding these differences is crucial for effective management during pregnancy complications related to placentation issues.

Placenta Previa and Abruptio Placenta: Key Insights

Understanding Placenta Previa

Placenta previa is a common exam question, often focusing on painless vaginal bleeding associated with this condition.

In contrast to placenta previa, abruptio placenta presents with painful vaginal bleeding that is typically dark red in color.

Characteristics of Bleeding

Most bleeding occurs at rest; mothers may not realize the extent of their bleeding until they find themselves in a pool of blood.

The uterus feels soft and boggy during placenta previa, while it feels hard and firm in cases of abruptio placenta due to contractions.

Differentiating Between Conditions

Key differences between painless (placenta previa) and painful (abruptio placenta) vaginal bleeding are crucial for diagnosis.

Diagnosis involves understanding the type of bleeding—recurrent and revealed types are significant indicators.

Diagnostic Procedures

In cases of antepartum hemorrhage, pervaginal examination is contraindicated; ultrasound is preferred for safe confirmation.

A double setup examination may be performed under operating theater conditions if complications arise during assessment.

Management Strategies

Management differs significantly between placenta previa and abruptio placenta; termination of pregnancy is often necessary for the latter when separation occurs.

For abruptio placenta, immediate termination is critical if the placenta has prematurely separated from the uterus.

Active vs. Expectant Management

Active management involves terminating pregnancy if maternal hemodynamics are unstable or fetal heart sounds are absent.

If maternal stability is achieved and fetal heart sounds are present, continuation of pregnancy may be advised, especially if under 34 weeks gestation.

Postpartum Hemorrhage: Understanding Causes and Types

Definition of Postpartum Hemorrhage (PPH)

PPH is defined as any amount of bleeding from or into the genital tract following the birth of a baby, up to 42 days postpartum. This includes bleeding that occurs within six weeks after delivery.

Bleeding before the baby is born is referred to as antepartum hemorrhage (APH), while bleeding after delivery is classified as PPH.

Common Causes of PPH

The most common cause of PPH is an atonic uterus, accounting for approximately 80% of cases. It’s crucial to remember this statistic due to its significance in clinical practice.

Other potential causes include trauma during delivery and blood clotting disorders, which can also lead to PPH. Understanding these causes helps in effective management and prevention strategies.

Types of PPH Based on Timing

There are two main types based on timing:

Primary PPH occurs within 24 hours post-delivery.

Secondary PPH happens between 24 hours and six weeks after delivery. Recognizing these timeframes aids in timely intervention.

Subtypes of Primary PPH

Primary PPH can be further divided into:

Third Stage PPH: Occurs when there is bleeding before the expulsion of the placenta.

True PPH: Refers to significant blood loss (more than 500 mL) occurring after the placenta has been expelled within the first 24 hours post-delivery. Understanding these distinctions is vital for diagnosis and treatment planning.

Blood Loss Classification

Blood loss during primary PPH can be categorized into three types based on severity:

Mild: More than 500 mL but less than 1000 mL.

Moderate: More than 1000 mL but less than 2000 mL.

Severe: More than 2000 mL, which may lead to shock in patients if not managed promptly. This classification assists healthcare providers in assessing risk levels effectively.

Risk Factors for Developing PPH

Several maternal risk factors contribute to the likelihood of experiencing PPH:

Conditions such as pregnancy-induced hypertension, anemia, or an over-distended uterus due to macrosomia or polyhydramnios increase risks significantly.

Prolonged labor (over twenty hours for primigravida or fourteen hours for multigravida) can also elevate risk levels for developing complications like PPH during delivery processes. Understanding these factors allows for better monitoring and preventive measures during labor and delivery care practices.

What is Placenta Accreta and Its Management?

Understanding Placenta Accreta

The discussion begins with an introduction to placenta accreta, a condition where the placenta attaches too deeply into the uterine wall.

It highlights risk factors associated with postpartum hemorrhage (PPH), emphasizing the importance of understanding both non-specific and specific management strategies for PPH.

Management of Postpartum Hemorrhage (PPH)

Non-specific management involves general measures such as hospitalization, IV fluid administration, and oxygen therapy.

Specific management starts with uterine fundal massage as a first step to reduce bleeding by promoting uterine contraction.

Medical Management

Medical management is conducted for 30 minutes; if ineffective, mechanical methods are employed next.

Mechanical Methods

Mechanical methods include uterine packing and manual compression to control bleeding without instruments.

A balloon device may be used to apply pressure within the uterus, reducing blood loss effectively.

Surgical Management

If mechanical methods fail, surgical intervention becomes necessary. This includes procedures like B-Lynch suturing or ligation of uterine arteries.

In extreme cases where bleeding cannot be controlled, hysterectomy may be required as a last resort.

Hypertension in Pregnancy: Key Concepts

Types of Hypertension in Pregnancy

The lecture transitions to hypertension in pregnancy, defining it when blood pressure exceeds 140/90 mmHg.

Classification of Hypertension

Different types include gestational hypertension, preeclampsia, eclampsia, and chronic hypertension. Each type has distinct clinical features and management protocols.

Risk Factors for Hypertension

Key risk factors include being a primigravida (first-time pregnant woman), having a large placenta size, metabolic syndrome conditions like antiphospholipid syndrome or previous family history of hypertension during pregnancy.

Understanding Hypertension in Pregnancy

Types of Hypertension During Pregnancy

Hypertension can be influenced by genetic factors, such as if the parents have a history of hypertension.

Gestational hypertension is defined as blood pressure exceeding 140/90 mmHg after 20 weeks of gestation.

Pre-eclampsia occurs when there is high blood pressure (over 140/90 mmHg) along with proteinuria and edema after 20 weeks of gestation.

Eclampsia is a severe complication of pre-eclampsia characterized by chronic high blood pressure (over 160/100 mmHg), proteinuria, and signs of organ damage.

Chronic Hypertension

Chronic hypertension is diagnosed if a female has high blood pressure (over 140/90 mmHg) before conception or persists post-delivery.

It indicates that the female had hypertension prior to pregnancy, which continues throughout the pregnancy and postpartum.

Differentiating Between Conditions

Understanding the definitions helps differentiate between gestational hypertension, pre-eclampsia, and chronic hypertension effectively.

Pre-eclampsia can be classified into mild (blood pressure between 140/90 mmHg and less than 160/110 mmHg with trace proteinuria) and severe forms.

Symptoms and Signs

Mild pre-eclampsia shows symptoms like trace proteinuria (+1 or +2), while severe cases exhibit higher levels (+3 or +4).

Pitting edema may occur in hypertensive conditions; it leaves indentations when pressed.

Organ Damage Indicators

Signs of organ damage include decreased urine output (<30 mL/hour), persistent headaches not relieved by medication, and elevated creatinine levels.

Increased uric acid levels serve as biological markers for pre-eclampsia.

HELLP Syndrome

HELLP syndrome stands for Hemolysis, Elevated Liver enzymes, Low Platelet count; it's a serious complication associated with severe pre-eclampsia.

Recognizing HELLP syndrome's components is crucial for diagnosis: hemolysis indicates breakdown of red blood cells; elevated liver enzymes signal liver distress; low platelet counts indicate potential bleeding issues.

By understanding these key concepts related to hypertension during pregnancy, healthcare professionals can better manage risks associated with these conditions.

Understanding Pre-Eclampsia and Management Strategies

Overview of Pre-Eclampsia

The discussion begins with an overview of pre-eclampsia, emphasizing the importance of understanding drug choices for management.

A key diagnostic tool mentioned is the "rollover test," which involves checking blood pressure in different positions (lying down and sitting). A variation greater than 20 mmHg indicates a positive result.

Drug Choices for Treatment

The primary drug of choice for managing pre-eclampsia is Levitalol. This is crucial to remember when discussing treatment options.

Magnesium sulfate (MgSO4) is highlighted as a critical medication, especially in cases where it has been administered previously.

Therapeutic Ranges and Toxicity Management

The therapeutic range for magnesium sulfate is noted to be between 4 to 7 mEq/L. Understanding this range is essential for safe administration.

In case of toxicity from MgSO4, calcium gluconate should be readily available at the bedside as an antidote.

Signs and Symptoms of Toxicity

Key signs indicating magnesium toxicity include decreased urine output and respiratory depression. It’s vital to monitor these symptoms closely.

Absent reflexes are also a significant indicator of potential toxicity, necessitating immediate medical attention.

Administration Protocols

MgSO4 can be given in loading doses during emergencies (e.g., seizures), typically administered intravenously or intramuscularly.

Loading doses consist of 4 grams IV or 10 grams IM divided into specific intervals according to established protocols like the Pritchard regimen.

Alternative Medications

If Levitalol isn't available, Methyldopa may be considered as an alternative due to its slow action.

For hypertensive crises, Hydralazine can be used effectively when blood pressure spikes significantly above normal levels.

Management of Hypertension and Related Medications

Overview of Medications for Blood Pressure Control

IV Levitt and Nifedipine are mentioned as medications that can be used to manage blood pressure, along with Nitroglycerin. These drugs are essential in controlling hypertension.

Understanding Hypertensive Crisis

A hypertensive crisis is characterized by a sudden increase in blood pressure. Chronic conditions may lead to acute spikes, which require careful management.

Monitoring Female Patients with Hypertension

When female patients present with hypertension, their blood pressure and weight are closely monitored. Rapid weight gain is traditionally seen as a sign of hypertension but is no longer included in the assessment criteria.

Patient Guidance and Education

Nurses play a crucial role in guiding female patients about monitoring fetal movements during pregnancy. They provide information on alarming signs that necessitate immediate hospital visits.

Summary of Class Content

The session concludes with an acknowledgment of the complexity of the topic, emphasizing the importance of understanding discussed concepts and encouraging practice through questions for better retention. Future discussions will include diabetes management.