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Twin-to-Twin Transfusion Syndrome
Daniel W Skupski
SECTION 1: WHERE DID WE COME FROM?
CHAPTER 1:
History
INTRODUCTION
DISTANT HISTORY
FETAL DIAGNOSIS AND THERAPY
Laser Therapy
COLLABORATION
SUMMARY
SECTION 2: WHY DOES TTTS OCCUR?
CHAPTER 2:
The Hidden Costs of Monochorionicity
INTRODUCTION
THE MAGNITUDE OF THE PROBLEM
APPARENT AND HIDDEN COSTS OF MONOCHORIONIC TWINS
Mode of Conception
Diagnosis
Fetal Growth
Twin-to-Twin Transfusion Syndrome
Single Fetal Death
Cerebral Palsy
Natural History of Monochorionic Pregnancies
Preterm Birth
CHAPTER 3:
Placentation
INTRODUCTION
PLACENTAL ANATOMY
Early Placental Development
Chorionic Plate Architecture
A HYPOTHESIS REGARDING ZYGOSITY, CHORIONICITY, THE INTER-TWIN MEMBRANE AND VASCULAR CONNECTIONS
Vascular Connections Throughout Gestation
SUMMARY
CHAPTER 4:
Pathophysiology
INTRODUCTION
PLACENTAL PATHOPHYSIOLOGY
Arteriovenous Anastomoses
Superficial Anastomoses
Intertwin Transfusion
Early Development
FETAL PATHOPHYSIOLOGY
Renovascular System
Sonographic Findings
Renal Regulation
Cardiovascular System
Echocardiographic Findings
Function Dictates Structure
Peripheral Doppler Abnormalities
Endocrine Markers
CONCLUSION
ACKNOWLEDGMENT
CHAPTER 5:
Color Injection and Digital Angiography
INTRODUCTION
EXPLAINING CLINICAL SYMPTOMS OF MONOCHORIONIC TWINS THROUGH POSTNATAL CORRELATION WITH THE PLACENTA
CORRELATING PRENATAL SONOGRAPHIC AND INTRAUTERINE LASER FINDINGS OF MONOCHORIONIC TWINS WITH THE PLACENTAL VASCULATURE BY COLOR INJECTIONS
Computer Angiography of Placental Vessels in Monochorionic Multiples
Case 1: Normal Pregnancy Followed by Uneventful Delivery of MC Twins
Case 2: Normal Pregnancy Course with Acute Fetal Distress and Acute TTTS during the Second Stage of Labor
Case 3: Chronic TTTS Stage 1
Case 4: Chronic TTTS Stage I
Case 5: Chronic TTTS Stage 3
Case 6: Chronic TTTS Stage 4
Case 7: Monochorionic Triamniotic Triplet Pregnancy with Transient Oligohydramnios of One Triplet and Polyhydramnios of One of the Other Triplets
CONCLUSION
SECTION 3: WHAT IS TTTS?
CHAPTER 6:
Natural History
INTRODUCTION
MISSTEPS
DETERMINING THE NATURAL HISTORY OF TWIN-TO-TWIN TRANSFUSION SYNDROME
SUMMARY
CHAPTER 7:
Clinical Effects
INTRODUCTION
THE MONOCHORIONIC PLACENTA
Signs and Effects of Volume Imbalance
Abnormalities in Amniotic Fluid Production
Abnormalities in Fetal Hemoglobin Concentration—TAPS
Fetal Cardiovascular Findings related to Abnormal Volume Status
Maternal Effects of Uterine Distension
Maternal Mirror Syndrome
Signs and Effects of Nutrient Imbalance—Fetal Growth Discordance
Discordant Fetal Anomalies
CLINICAL EVOLUTION AND IMPLICATIONS FOR SURVEILLANCE AND RISK ASSESSMENT
CONCLUSION
CHAPTER 8:
Diagnosis
INTRODUCTION
DIAGNOSIS OF CHORIONICITY
First Trimester Ultrasound Examination
Second Trimester Ultrasound Examination
Risk Stratification for Monochorionic Twins
ULTRASOUND SURVEILLANCE OF THE MONOCHORIONIC TWIN GESTATION
DIAGNOSIS OF TWIN-TO-TWIN TRANSFUSION SYNDROME
CONCLUSION
CHAPTER 9:
Maternal Nutrition
INTRODUCTION
METHODS
RESULTS
CONSEQUENCES
CHAPTER 10:
The Cervix
RISK OF SPONTANEOUS PRETERM BIRTH IN TWINS
Cervical Length and the Risk of Preterm Birth
INTERVENTIONS TO PREVENT PRETERM BIRTH IN THE SETTING OF A SHORT CERVIX
Interventions for Short Cervix in the Setting of TTTS
Pessary
SUMMARY
SECTION 4: WHEN DOES TTTS OCCUR?
CHAPTER 11:
Acute Twin-to-Twin Transfusion Syndrome
INTRODUCTION
ETIOLOGY
INCIDENCE
LITERATURE REVIEW
HYPOTHESES
MANAGEMENT
SUMMARY
CHAPTER 12:
Triplets
INTRODUCTION
PREVALENCE OF FETO-FETAL TRANSFUSION SYNDROME (FFTS) IN TRIPLETS
FFTS in Dichorionic vs Monochorionic Triplets
OUTCOMES WITH NO TREATMENT
TREATMENT OPTIONS
Amnioreduction
Laser Therapy
Outcome Data
Monochorionic Triplets
Technical Considerations
NEONATAL FOLLOW-UP
COUNSELING AND ETHICAL CONSIDERATIONS
UNANSWERED QUESTIONS
CONCLUSION
SECTION 5: HOW DO WE TREAT TTTS?
CHAPTER 13:
Therapy
TREATMENT OPTIONS
Amnioreduction
Septostomy
Laser Treatment
ANESTHESIA
ABDOMINAL ENTRY
TECHNIQUE
OPERATIVE TIME
LEARNING CURVE
PERIOPERATIVE CARE AND FOLLOW-UP
SURGICAL FAILURE
COMPLICATIONS
CONCLUSION
CHAPTER 14:
Neonatal Outcomes
INTRODUCTION
NEONATAL MORTALITY
NEONATAL MORBIDITY
Neurologic Morbidity
Short-Term Neurologic Morbidity and Cerebral Injury
Long-Term Neurodevelopmental Impairment
Cardiovascular Morbidity and Right Ventricular Outflow Tract Obstruction
Renal Morbidity
Hematologic Morbidity
Antenatal Hypoxic-Ischemic Lesions
Amniotic Band Syndrome
CONCLUSION
CHAPTER 15:
Monitoring of Disease
INTRODUCTION
MONITORING STAGE I TTTS
Monitoring TTTS Pregnancies Following Laser Surgery
Monitoring Fetal Condition after Laser
COMPLICATIONS: WHAT TO LOOK FOR (BOX 15.2)
Preterm Prelabor Rupture of Membranes
Chorioamnion Separation
Ruptured Intertwin Membrane
SINGLE FETAL DEATH: WHAT TO DO?
Fetal Brain Damage and the Role of MRI
Limb Reduction and Amniotic Bands
Vasa Previa
Residual Anastomoses after Laser
Incidence, Causes and Consequences
Twin Anemia Polycythemia Sequence
CONCLUSION
CHAPTER 16:
Ethical Dimensions
INTRODUCTION
THE ETHICS OF NON-DIRECTIVE AND DIRECTIVE COUNSELING IN THE INFORMED CONSENT PROCESS
Ethically Justified Decision-Making Pathway
CONCLUSION
SECTION 6: WHAT'S NEXT?
CHAPTER 17:
The Future
INDEX
TOC
Index
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