More Labor and Delivery Content
More Labor and Delivery Content
Process of Labor
Factors Affecting Labor: Passenger
Passenger: Refers specifically to the fetus.
Size of the Fetal Head: Important as it influences the labor process.
Bones in the fetal skull: The fetal skull is made up of several bones that are not fused at birth, allowing for molding during labor.
Fontanels: Soft spots on a newborn's skull that help in the process of birth by allowing movement and compression.
Molding: The process by which the fetal head changes shape during labor to fit through the birth canal.
Fetal Presentation: The part of the fetus that enters the pelvic inlet first and leads through the birth canal during labor.
Cephalic: Presenting part is the occiput (commonly referred to as the “vertex”).
Breech: Presenting part is the sacrum.
Shoulder: Presenting part is the scapula.
Cephalopelvic disproportion: This describes a situation where either the fetal head is too large to fit through the pelvis, or the pelvis is too small to accommodate the fetal head.
Factors Affecting Labor: Passenger (Continued)
Fetal Lie: The relation of the long axis (spine) of the fetus to the long axis (spine) of the mother.
Longitudinal:
Vertical:
Fetal Attitude: The relation of the fetal body parts to one another, influencing the birth process.
Factors Affecting Labor: Passenger (Further Details)
Fetal Position: The relationship of a reference point on the presenting part to the four quadrants of the mother’s pelvis.
Designation: Position is denoted by a three-part letter abbreviation for clarity.
Fetal Station: A measure of the degree of descent of the presenting part of the fetus through the birth canal. This is critical for assessment during labor.
Engagement: This typically corresponds to 0 station in the context of fetal descent.
Factors Affecting Labor: Powers, Position, and Psychologic Factors
Primary Powers: These refer to the contractions that facilitate the labor process.
Characteristics: Frequency, duration, and intensity are key characteristics that impact labor.
Effacement: The thinning of the cervix that occurs before and during labor.
Dilation: The opening of the cervix measured in centimeters (from 0 to 10).
Secondary Powers: These are the bearing-down efforts made by the woman during labor, including the Valsalva maneuver.
**Position: ** The position of the laboring woman can impact the labor process significantly.
Psychologic State: The emotional and psychological state of the laboring woman also plays a crucial role in the progression of labor.
Process of Labor: Overview
Definition: Labor is the process of moving the fetus, placenta, and membranes out of the uterus and through the birth canal.
Signs Preceding Labor: Includes various signs that indicate the onset of labor:
Lightening or Dropping: Refers to the descent of the fetus into the pelvic area.
Bloody Show: The passage of a small amount of blood or mucous, indicating cervical changes prior to labor.
Onset of Labor: Refers to the beginning of regular contractions and changes in the cervix.
Multiple Factors: The onset of labor cannot be ascribed to a single cause; it is a complex interplay of factors.
Mechanism of Labor
Mechanism of Labor: Refers to the necessary turns and adjustments that occur during the childbirth process for successful delivery.
7 Cardinal Movements of Mechanism of Labor: These movements describe the sequence that the fetus undergoes during labor:
Engagement
Descent
Flexion
Internal Rotation
Extension
External Rotation (also called Restitution)
Expulsion
Pain Management in Labor
Pain During Labor and Birth
Individualized Nature of Pain: Pain experienced during labor is a highly individualized phenomenon characterized by both sensory and emotional components.
**Neurologic Origins of Pain: **
Visceral: Pain originating from internal organs.
Somatic: Pain arising from the tissues such as skin, muscle, and joint.
Perception of Pain: Influenced by multiple factors, including:
Expression of Pain: How a woman expresses her pain can vary significantly.
Physiologic Reactions: The body’s natural responses to pain can also affect perception.
Sensory Reactions: These reactions may manifest in heightened sensitivity or other responses.
Emotional Reactions: Emotional state can also influence pain management.
Factors Influencing Pain Response
Physiologic Factors: Various bodily functions and states can affect pain perception.
Culture: Nurses should understand cultural contexts that mediate pain responses.
Anxiety: Increased anxiety can exacerbate the perception of pain.
Previous Experience: Past experiences can shape how a woman perceives current labor pain.
Comfort and Support: Emotional and physical support can mitigate pain.
Environment: The setting of labor can have a significant impact on the experience of pain.
Nonpharmacologic Pain Management Techniques
Preparation Methods for Labor and Birth: Enhancing comfort and effectiveness through various techniques:
Relaxing and Breathing Techniques: Methods to promote relaxation and manage contractions.
Focusing and Relaxation Techniques: Techniques to maintain concentration and induce relaxation during labor.
Breathing Techniques: Different approaches including:
Slow Breathing
Quick Breathing
Patterned Breathing
Effleurage and Counterpressure: Manual techniques to relieve pain through touch.
Touch and Massage: Hands-on methods to soothe and comfort the laboring woman.
Application of Heat and Cold: Utilizing temperature to alleviate discomfort (e.g., heating pads or cold packs).
Additional Nonpharmacologic Pain Management Methods
Acupressure and Acupuncture: Traditional techniques aimed at pain relief.
Transcutaneous Electrical Nerve Stimulation (TENS): A method using electrical impulses to reduce pain.
Water Therapy (Hydrotherapy): Use of water for comfort and pain relief.
Intradermal Water Block: Technique of injecting sterile water to relieve back pain.
Aromatherapy: The use of scents to soothe and relax.
Music Therapy: Use of music to alleviate anxiety and enhance comfort during labor.
Hypnosis: A technique to induce relaxation and reduce perception of pain.
Pharmacologic Pain Management
Importance of Pain Relief: It is considered unacceptable for women in labor to endure severe pain when safe and effective relief measures exist.
Sedatives: Medications that relieve anxiety and promote sleep; often administered during prolonged early labor to promote relaxation.
Barbiturates: Rarely used in obstetrics due to safety concerns.
Phenothiazines: Occasionally used but not common in obstetrics.
Benzodiazepines: Can enhance the effects of opioid analgesics and diminish nausea and vomiting.
Pharmacologic Pain Management Definitions
Anesthesia: Encompasses multiple elements: analgesia (pain relief), amnesia (loss of memory), relaxation, and control of reflex mechanisms.
Analgesia: The alleviation of the sensation of pain or elevation of the pain threshold without inducing loss of consciousness.
Selection of Analgesic/Anesthetic: Dependent on the stage of labor and the planned method of birth.
Pharmacologic Pain Management Methods
Systemic Analgesia: Administered opioids that readily cross the placenta, affecting the fetus and newborn significantly, with limited analgesic effectiveness during labor.
Opioid Antagonists (e.g., Narcan): Drugs that can counteract opioid effects.
Nerve Block Analgesia and Anesthesia: Techniques to produce sensory blockade with varying degrees of motor blockade in certain body areas.
Local Perineal Infiltration Anesthesia: Localized anesthesia in the perineum.
Pudendal Nerve Block: Targeted nerve block for pain relief during labor.
Spinal Anesthesia(Block): A method to deliver anesthetic into the spinal canal.
Post-Dural Puncture Headaches: Potential complications from spinal anesthesia.
Epidural Blood Patch: Treatment for post-dural puncture headaches.
Epidural Anesthesia and Analgesia
Current Practice: This is recognized as highly effective for pain relief during labor.
Methodology: It significantly alleviates pain from uterine contractions while preserving some pressure sensations.
Advantages and Disadvantages: Women may opt for combined spinal-epidural analgesia (CSE) or an epidural, also noted as a “walking epidural,” though mobility may be limited due to sedative effects and feelings of weakness.
Epidural and Intrathecal (spinal) opioids: Additional medications may be used in conjunction with the epidural.
Contraindications to Epidural and Subarachnoid Blocks
Medical Conditions: Various conditions prevent the use of these blocks, including:
Active or anticipated serious maternal hemorrhage
Maternal hypotension
Maternal coagulopathy
Infection at the injection site
Increased intracranial pressure
Allergy to the anesthetic agent
Maternal refusal/inability to cooperate
Certain maternal cardiac conditions.
Epidural Block Effects on Newborn: Current evidence suggests no significant impact on long-term mental and neurologic development in children following epidural anesthesia.
Nitrous Oxide for Analgesia
Administration: Nitrous oxide mixed with oxygen can be inhaled in low concentrations (50% or less) to provide relief during labor and delivery.
General Anesthesia: Rarely used for uncomplicated vaginal births; women should be premedicated with a clear oral antacid to neutralize stomach acid before its use. This is critical given the risk of neonatal narcosis; timely delivery post-anesthesia is essential to minimize fetal exposure.
Care Management for Nonpharmacologic Interventions
Pain Assessment During Labor and Birth: A pain scale is often implemented to measure pain pre- and post-intervention.
Evaluating Pain Response: Assessment should also include the woman’s coping ability and her satisfaction with the labor and birth experience.
Fetal Assessment
FHR Monitoring: Care Management
EFM Pattern Recognition: The interpretation of electronic fetal monitoring patterns involves certain categorizations established during the NICHD Workshop 2008:
Category I: Normal.
Category II: Indeterminate and requires further evaluation.
Category III: Abnormal, typically indicating concerning fetal conditions.
Fetal Heart Rate Patterns
Baseline Fetal Heart Rate: The standard measurement of the fetal heart rate.
Variability: Defined as irregular waves or fluctuations in the baseline FHR of two cycles per minute or more, categorized into four possibilities:
Absent: No variability.
Minimal: Little variability.
Moderate: Normal variability.
Marked: Excessive variability.
Further Fetal Heart Rate Patterns
Tachycardia: Greater than 160 beats per minute sustained for 10 minutes or more.
Bradycardia: Less than 110 beats per minute sustained for 10 minutes or longer.
Periodic & Episodic Changes in FHR: Includes:
Periodic changes: Changes associated with uterine contractions.
Episodic (nonperiodic changes): Changes not associated with contractions, such as accelerations, indicating fetal well-being.
Decelerations in FHR
Distinguished by Characteristics: Decelerations can be benign or abnormal and classified as:
Early Decelerations: Occur in response to fetal head compression.
Late Decelerations: Indicate uteroplacental insufficiency.
Variable Decelerations: Caused by umbilical cord compression.
Prolonged Decelerations: Lasting more than 2 minutes but less than 10 minutes.
Fetal Heart Rate Categories Explained
Category I: Normal patterns indicating reassuring fetal health!
Baseline FHR: Between 110-160 beats/min.
Baseline Fetal Heart Rate Variability: Moderate variability.
Late or Variable Decelerations: Absent.
Early Decelerations: May be present or absent.
Accelerations: May be present or absent.
Indeterminate FHR Patterns (Category II)
Characteristics: These patterns may suggest a need for further assessment but do not currently indicate clear distress.
Bradycardia without absent baseline variability.
Tachycardia may also be present.
Minimal or absent baseline variability that is not accompanied by recurrent decelerations.
Marked baseline variability is also a consideration.
Abnormal FHR Patterns: Category III
Indicators of Concern: Features that may indicate fetal hypoxemia (insufficient oxygen), potential for severe fetal hypoxia include:
Absence of baseline variability.
Recurrent or late decelerations may indicate distress.
Bradycardia indicating worsening condition.
Nursing Management of Abnormal FHR Patterns
Five Essential Components of the FHR tracing to monitor closely include:
Baseline rate.
Baseline variability.
Accelerations.
Decelerations.
Observations for changes or trends over time.
Corrective Measures: Immediate actions must be taken if any component is abnormal to enhance fetal oxygenation:
Assist the woman to a lateral side-lying position.
Increase maternal blood volume via primary IV infusion adjustments.
Guidelines advise against routine oxygen supplementation for individuals with normal saturation levels in the context of fetal intrauterine resuscitation.
Other Methods of Assessment and Intervention
Additional Assessment Techniques: Include fetal scalp stimulation and vibroacoustic stimulation, umbilical cord acid-base determination, fetal scalp blood sampling, amnioinfusion, and tocolytic therapy for managing labor.
Client and Family Teaching: Educating and involving the family around labor and birth processes is essential.
Documentation: Crucial for maintaining clear records of assessments and interventions.
Nursing care during labor and birth
First Stage of Labor - Definitions
Traditional View: Previously, the first stage was divided into three phases:
Latent Phase: Up to 3 cm of dilation.
Active Phase: 4 to 7 cm of dilation.
Transition Phase: 8 to 10 cm of dilation.
Changed Definitions: Recent findings have shifted the first stage into two phases:
Latent Phase: Onset of labor featuring regular, painful contractions leading to cervical change.
Active Phase: Marked by quickened cervical dilation rate beginning at 6 cm and extending to complete dilation at 10 cm.
Care Management During the First Stage of Labor
Labor Evaluation: Determining whether the woman is in true versus false labor by considering:
Contraction characteristics.
Cervical examinations.
Fetal condition assessments.
Obstetric Triage: Ensuring pregnant women in triage are presumed to be in "true" labor until a qualified health care provider determines otherwise, as per the EMTALA (Emergency Medical Treatment and Active Labor Act).
Nursing Interventions: Support During First Stage of Labor
Supportive Care: The laboring woman should receive emotional support, physical care, comfort measures, and relevant information.
Sources of Support Include: Nurses, partners, doulas, and family members such as parents or siblings during labor.
Membrane Rupture and Associated Definitions
Membrane Rupture: Include classifications based on the timing of rupture and its implications:
Premature Rupture of Membranes (PROM): Rupture occurring at or after 37 weeks, unrelated to premature delivery.
Prelabor Rupture of Membranes (PPROM): Rupture occurring before 37 weeks.
Prolonged Rupture of Membranes: Defined as rupture lasting over 18 hours prior to delivery.
Second Stage of Labor: Definition
Infant Birth: The second stage commences with full cervical dilation (10 cm) and continues until the infant is born.
Phases of Second Stage of Labor
Two Phases:
Latent Phase: Sometimes called delayed pushing or passive descent; characterized by a relatively calm phase with the baby descending through the birth canal.
Active Phase: This is the phase involving active pushing and strong urges to bear down, often initiated by the Ferguson reflex—triggered when the presenting part presses on pelvic floor stretch receptors.
Care Management During Second Stage of Labor
Key Assessments and Preparations: Considering maternal positioning, bearing-down efforts, fetal heart rate monitoring, and partner support.
Maternal Positioning: Options include supine, semirecumbent, or lithotomy positions. Upright positions have shown to shorten labor but are not widely adopted.
Support of Partner: Critical during labor, providing emotional and physical support to the laboring woman.
Mechanism of Birth in Second Stage
Delivery Environment: Labor can occur in a delivery room or birthing room, with careful consideration of the mechanisms at play, including positioning, crowning, episiotomy risks, and cord management.
Crowning and Episiotomy: The emergence of the baby's head, a consideration of potential lacerations, and episiotomy, which has seen a decline in practice based on a lack of evidence supporting its benefits.
Post-Birth Assessments: Immediate assessment and care of the newborn and provisions for skin-to-skin contact between mother and baby (Lotus birth).
Perineal Trauma Related to Childbirth
**Types of Perineal Lacerations:
First degree: Confined to the skin.
Second degree: Extends into the perineal body.
Third degree: Involves the external anal sphincter muscle.
Fourth degree: Extends through the anal sphincter and rectal mucosa.
Perineal Trauma Related to Childbirth (Continued)
Associated Injuries: May include vaginal and urethral lacerations and cervical injuries.
Episiotomy Definition: An incision made in the perineum to enlarge the vaginal outlet, which has declined due to research undermining its benefits.
Third Stage of Labor
Definition: The period from the birth of the baby until the placenta is expelled. Generally, it is the shortest stage of labor.
Management Approaches: Include both passive and active management.
Signs of Placental Separation
Signs Include: Lengthening of the umbilical cord and a gush of blood from the vagina.
Considerations for Placental Examination: Includes checking for any complications and ensuring proper disposal aligned with cultural practices.
Fourth Stage of Labor
Overview: Begins post-placenta expulsion and continues until maternal stability is secured typically within the first hour post-birth.
Care Management Focus: Monitoring of maternal physical status, ensuring the return to pre-pregnancy physiologic conditions, and recognizing signs of complications like excessive blood loss and changes in vital signs/consciousness.
Support of Family: Important for establishing family-newborn relationships; helping family members support new mothers is crucial during this period.
Fourth Stage of Labor: Nursing Interventions
Focus on Care for New Mother and Family: Engage family members by allowing bonding time with the newborn during the infant's alert state.
Monitoring Relationships: Recognize the variety of reactions families may have and provide ongoing support to the mother from healthcare personnel.
Obstetric Emergencies
Emergencies Include: Various situations that can arise such as vaginal bleeding, amniotic fluid embolism, placental abruption, and placenta previa.
Question Example
Evaluating External Monitor Tracing: In the context of a woman in active labor, the fetal heart rate (FHR) decelerating at the onset of contractions warrants further assessment. Options for action include:
a. Change the woman’s position
b. Discontinue the oxytocin infusion
c. Insert an internal monitor
d. Document the finding in the client’s record.
Conclusion
A comprehensive understanding of the labor and delivery process, alongside pain management and assessment strategies, is crucial for nursing care during labor.