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Miller RS, Miller JL, Monson MA, Porter TF, Običan SG, Simpson LL. Society for Maternal-Fetal Medicine Consult Series #72: Twin-twin transfusion syndrome and twin anemia-polycythemia sequence. Am J Obstet Gynecol 2024; 231:B16-B37. [PMID: 39029545 DOI: 10.1016/j.ajog.2024.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2024]
Abstract
Thirty percent of spontaneously occurring twins are monozygotic, of which two-thirds are monochorionic, possessing a single placenta. A common placental mass with shared intertwin placental circulation is key to the development and management of complications unique to monochorionic gestations. In this Consult, we review general considerations and a contemporary approach to twin-twin transfusion syndrome and twin anemia-polycythemia sequence, providing management recommendations based on the available evidence. The following are the Society for Maternal-Fetal Medicine recommendations: (1) we recommend routine first-trimester sonographic determination of chorionicity and amnionicity (GRADE 1B); (2) we recommend that ultrasound surveillance for twin-twin transfusion syndrome begin at 16 weeks of gestation for all monochorionic-diamniotic twin pregnancies and continue at least every 2 weeks until delivery, with more frequent monitoring indicated with clinical concern (GRADE 1C); (3) we recommend that routine sonographic surveillance for twin-twin transfusion syndrome minimally include assessment of amniotic fluid volumes on both sides of the intertwin membrane and evaluation for the presence or absence of urine-filled fetal bladders, and ideally incorporate Doppler study of the umbilical arteries (GRADE 1C); (4) we recommend fetoscopic laser surgery as the standard treatment for stage II through stage IV twin-twin transfusion syndrome presenting between 16 and 26 weeks of gestation (GRADE 1A); (5) we recommend expectant management with at least weekly fetal surveillance for asymptomatic patients continuing pregnancies complicated by stage I twin-twin transfusion syndrome, and consideration for fetoscopic laser surgery for stage I twin-twin transfusion syndrome presentations between 16 and 26 weeks of gestation complicated by additional factors such as maternal polyhydramnios-associated symptomatology (GRADE 1B); (6) we recommend an individualized approach to laser surgery for early- and late-presenting twin-twin transfusion syndrome (GRADE 1C); (7) we recommend that all patients with twin-twin transfusion syndrome qualifying for laser therapy be referred to a fetal intervention center for further evaluation, consultation, and care (Best Practice); (8) after laser therapy, we suggest weekly surveillance for 6 weeks followed by resumption of every-other-week surveillance thereafter, unless concern exists for post-laser twin-twin transfusion syndrome, post-laser twin anemia-polycythemia sequence, or fetal growth restriction (GRADE 2C); (9) following the resolution of twin-twin transfusion syndrome after fetoscopic laser surgery, and without other indications for earlier delivery, we recommend delivery of dual-surviving monochorionic-diamniotic twins at 34 to 36 weeks of gestation (GRADE 1C); (10) in twin-twin transfusion syndrome pregnancies complicated by posttreatment single fetal demise, we recommend full-term delivery (39 weeks) of the surviving co-twin to avoid complications of prematurity unless indications for earlier delivery exist (GRADE 1C); (11) we recommend that fetoscopic laser surgery not influence the mode of delivery (Best Practice); (12) we recommend that prenatal diagnosis of twin anemia-polycythemia sequence minimally require either middle cerebral artery Doppler peak systolic velocity values >1.5 and <1.0 multiples of the median in donor and recipient twins, respectively, or an intertwin Δ middle cerebral artery peak systolic velocity >0.5 multiples of the median (GRADE 1C); (13) we recommend that providers consider incorporating middle cerebral artery Doppler peak systolic velocity determinations into all monochorionic twin ultrasound surveillance beginning at 16 weeks of gestation (GRADE 1C); and (14) consultation with a specialized fetal care center is recommended when twin anemia-polycythemia sequence progresses to a more advanced disease stage (stage ≥II) before 32 weeks of gestation or when concern arises for coexisting complications such as twin-twin transfusion syndrome (Best Practice).
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Espinoza J, Agarwal N, Johnson A, Hernandez-Andrade E, Backley S, Papanna R, Bergh EP. Elevated middle cerebral artery peak systolic velocity and risk of death in donor twin affected by twin-twin transfusion syndrome but not twin anemia-polycythemia sequence. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2024; 64:222-227. [PMID: 38437460 DOI: 10.1002/uog.27629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/29/2024] [Accepted: 02/18/2024] [Indexed: 03/06/2024]
Abstract
OBJECTIVES To determine the association between elevated (> 1.5 multiples of the median (MoM)) middle cerebral artery (MCA) peak systolic velocity (PSV) and fetal demise of the donor twin in pregnancies complicated by twin-twin transfusion syndrome (TTTS) in the absence of twin anemia-polycythemia sequence (TAPS). Secondary objectives were to evaluate if donor or recipient MCA-PSV is associated with a risk for their corresponding fetal death, and to compare the proportion of donor fetuses with low MCA pulsatility index (PI) among donor twins with high MCA-PSV and those with normal MCA-PSV to evaluate the contribution of blood-flow redistribution to the fetal brain in donor twins with high MCA-PSV. METHODS This prospective cohort study included TTTS cases that underwent laser surgery between 2011 and 2022 at a single center. TAPS cases were excluded from the study. Multivariable and Poisson regression analysis were performed to explore the association between isolated elevated donor MCA-PSV and fetal demise, adjusted for TTTS stage, selective fetal growth restriction (sFGR) and other confounders. RESULTS Of 660 TTTS cases, donor MCA-PSV was not recorded in 48 (7.3%) cases. Of the remaining 612 patients, nine (1.5%) were lost to follow-up and 96 TAPS cases were excluded; thus, 507 cases were included in the study. High donor MCA-PSV was seen in 6.5% (33/507) of cases and was an independent risk factor for donor fetal demise (adjusted relative risk (aRR), 4.52 (95% CI, 2.72-7.50)), after adjusting for confounders. Regression analysis restricted to each Quintero TTTS stage demonstrated that high donor MCA-PSV was an independent risk factor for fetal demise of the donor in Quintero Stage II (aRR, 14.21 (95% CI, 1.09-186.2)) and Quintero Stage III (aRR, 3.41 (95% CI, 1.82-6.41)). Donor MCA-PSV in MoM was associated with fetal demise of the donor (area under the receiver-operating-characteristics curve (AUC), 0.69; P < 0.001), but recipient MCA-PSV in MoM was not associated with fetal demise of the recipient (AUC, 0.54; P = 0.44). A higher proportion of donor twins in the group with high MCA-PSV had a low MCA-PI compared to the group with normal MCA-PSV (33.3% vs 15.5%; P = 0.016). CONCLUSIONS Elevated donor MCA-PSV without TAPS prior to laser surgery for TTTS is associated with a 4-fold increased risk for donor fetal demise, adjusted for sFGR, TTTS stage and other confounders. Doppler evaluation of donor MCA-PSV prior to laser surgery may help stratify TTTS staging to evaluate the risk of donor fetal demise. © 2024 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- J Espinoza
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - N Agarwal
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - A Johnson
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - E Hernandez-Andrade
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - S Backley
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - R Papanna
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
| | - E P Bergh
- Division of Fetal Intervention, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, University of Texas Health Science Center, Houston, TX, USA
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Tricca S, Parazzini C, Doneda C, Arrigoni F, Tortora M, Lanna M, Casati D, Faiola S, Righini A, Izzo G. Magnetic resonance imaging of intracranial anomalies in pregnancies complicated by twin anemia-polycythemia sequence. Neuroradiology 2024; 66:1213-1223. [PMID: 38720066 DOI: 10.1007/s00234-024-03373-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 05/01/2024] [Indexed: 06/05/2024]
Abstract
PURPOSE To describe fetal brain Magnetic Resonance Imaging (MRI) findings in a large series of monochorionic (MC) pregnancies complicated by Twin Anemia-Polycythemia Sequence (TAPS) prenatally diagnosed, so to characterize the potential intracranial complications associated with this condition, their frequency and potential treatment options. METHODS This is a retrospective study of MC twin pregnancies complicated by TAPS and undergone fetal MRI in a single institution from 2006 to 2023. MRI control was performed and post-natal ultrasound (US) or MRI were available. RESULTS 1250 MC pregnancies were evaluated in our institution. 50 pregnancies (4%) were diagnosed with TAPS, 29 underwent a fetal brain MRI. 13/29 pregnancies (44.8%) demonstrated brain findings at MRI in at least a twin. Neuroradiological findings were detected in 14/57 twins (24.6%). We detected four main categories of findings: hemorrhagic lesions, T2-weighted white-matter hyperintensities (WMH), brain edema-swelling and venous congestion. Nineteen findings were present in the anemic and three in the polycythemic twins, with a statistically significant ratio between the two groups (p-value = 0.01). Intrauterine MRI follow-up demonstrated the sequalae of hemorrhagic lesions. A complete regression of brain swelling, veins prominence and T2-WMHs was demonstrated after treatment. Postnatal imaging confirmed prenatal features. CONCLUSIONS Our work demonstrates that TAPS-related MRI anomalies consisted in edematous/hemorrhagic lesions that occur mostly in anemic rather than in polycythemic twins. Fetoscopic laser surgery could have a potential decongestant role. Therefore, prenatal MRI may help in counselling and management in TAPS pregnancies, especially for the planning of therapy and the monitoring of its efficacy.
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Affiliation(s)
- Stefano Tricca
- Department of Pediatric Radiology and Neuroradiology, V. Buzzi Children's Hospital, Via Castelvetro 32, 20154, Milan, Italy.
- Department of Diagnosis and Treatment Services, Azienda Ospedaliero Universitaria Maggiore Della Carità, RadiodiagnosticsNovara, Italy.
| | - Cecilia Parazzini
- Department of Pediatric Radiology and Neuroradiology, V. Buzzi Children's Hospital, Via Castelvetro 32, 20154, Milan, Italy
| | - Chiara Doneda
- Department of Pediatric Radiology and Neuroradiology, V. Buzzi Children's Hospital, Via Castelvetro 32, 20154, Milan, Italy
| | - Filippo Arrigoni
- Department of Pediatric Radiology and Neuroradiology, V. Buzzi Children's Hospital, Via Castelvetro 32, 20154, Milan, Italy
| | - Mario Tortora
- Department of Advanced Biomedical Sciences, Neuroradiology Unit, University "Federico II", Naples, Italy
| | - Mariano Lanna
- Fetal Therapy Unit "U. Nicolini", V. Buzzi Children's Hospital, University of Milan, Milan, Italy
| | - Daniela Casati
- Fetal Therapy Unit "U. Nicolini", V. Buzzi Children's Hospital, University of Milan, Milan, Italy
| | - Stefano Faiola
- Fetal Therapy Unit "U. Nicolini", V. Buzzi Children's Hospital, University of Milan, Milan, Italy
| | - Andrea Righini
- Department of Pediatric Radiology and Neuroradiology, V. Buzzi Children's Hospital, Via Castelvetro 32, 20154, Milan, Italy
| | - Giana Izzo
- Department of Pediatric Radiology and Neuroradiology, V. Buzzi Children's Hospital, Via Castelvetro 32, 20154, Milan, Italy
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Lee HS, Abbasi N, Van Mieghem T, Mei-Dan E, Audibert F, Brown R, Coad S, Lewi L, Barrett J, Ryan G. Directive clinique n o 440 : Prise en charge de la grossesse gémellaire monochoriale. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2023; 45:607-628.e8. [PMID: 37541735 DOI: 10.1016/j.jogc.2023.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2023]
Abstract
OBJECTIF Cette directive clinique passe en revue les données probantes sur la prise en charge de la grossesse gémellaire monochoriale normale et compliquée. POPULATION CIBLE Les femmes menant une grossesse gémellaire ou multiple de haut rang. BéNéFICES, RISQUES ET COûTS: L'application des recommandations de cette directive devrait améliorer la prise en charge des grossesses gémellaires (ou multiples de haut rang) monochoriales compliquées et non compliquées. Ces recommandations aideront les fournisseurs de soins à surveiller adéquatement les grossesses gémellaires monochoriales ainsi qu'à détecter et prendre en charge rapidement les complications associées de façon optimale afin de réduire les risques de morbidité et mortalité périnatales. Ces recommandations impliquent une surveillance échographique plus fréquente en cas de grossesse monochoriale qu'en cas de grossesse bichoriale. DONNéES PROBANTES: La littérature publiée a été colligée par des recherches dans les bases de données PubMed et Cochrane Library au moyen de termes MeSH pertinents (Twins, Monozygotic; Ultrasonography, Prenatal; Placenta; Fetofetal Transfusion; Fetal Death; Fetal Growth Retardation). Les résultats ont été restreints aux revues systématiques, aux essais cliniques randomisés et aux études observationnelles. Aucune date limite n'a été appliquée, mais les résultats ont été limités aux contenus en anglais ou en français. MéTHODES DE VALIDATION: Les auteurs principaux ont rédigé le contenu et les recommandations et ils se sont entendus sur ces derniers. Le conseil d'administration de la SOGC a approuvé la version définitive aux fins de publication. Les auteurs ont évalué la qualité des données probantes et la force des recommandations en utilisant le cadre méthodologique GRADE (Grading of Recommendations Assessment, Development and Evaluation). Voir l'annexe A en ligne (tableau A1 pour les définitions et tableau A2 pour l'interprétation des recommandations fortes et conditionnelles [faibles]). PROFESSIONNELS CONCERNéS: Spécialistes en médecine fœto-maternelle, obstétriciens, radiologues, échographistes, médecins de famille, infirmières, sages-femmes, résidents et autres fournisseurs de soins de santé qui s'occupent de femmes menant une grossesse gémellaire ou multiple de haut rang. RéSUMé POUR TWITTER: Directive canadienne (SOGC) pour le diagnostic, la surveillance échographique et la prise en charge des complications de la grossesse gémellaire monochoriale (p. ex., STT, TAPS, retard de croissance sélectif, cojumeau acardiaque, monoamnionicité et mort d'un jumeau). DÉCLARATIONS SOMMAIRES: RECOMMANDATIONS.
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Lee HS, Abbasi N, Van Mieghem T, Mei-Dan E, Audibert F, Brown R, Coad S, Lewi L, Barrett J, Ryan G. Guideline No. 440: Management of Monochorionic Twin Pregnancies. JOURNAL OF OBSTETRICS AND GYNAECOLOGY CANADA 2023; 45:587-606.e8. [PMID: 37541734 DOI: 10.1016/j.jogc.2023.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2023]
Abstract
OBJECTIVE This guideline reviews the evidence-based management of normal and complicated monochorionic twin pregnancies. TARGET POPULATION Women with monochorionic twin or higher order multiple pregnancies. BENEFITS, HARMS, AND COSTS Implementation of these recommendations should improve the management of both complicated and uncomplicated monochorionic (and higher order multiple) twin pregnancies. They will help users monitor monochorionic twin pregnancies appropriately and identify and manage monochorionic twin complications optimally in a timely manner, thereby reducing perinatal morbidity and mortality. These recommendations entail more frequent ultrasound monitoring of monochorionic twins compared to dichorionic twins. EVIDENCE Published literature was retrieved through searches of PubMed and the Cochrane Library using appropriate MeSH headings (Twins, Monozygotic; Ultrasonography, Prenatal; Placenta; Fetofetal Transfusion; Fetal Death; Fetal Growth Retardation). Results were restricted to systematic reviews, randomized controlled clinical trials, and observational studies. There were no date limits, but results were limited to English or French language materials. VALIDATION METHODS The content and recommendations were drafted and agreed upon by the principal authors. The Board of the SOGC approved the final draft for publication. The authors rated the quality of evidence and strength of recommendations using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. See online Appendix A (Tables A1 for definitions and A2 for interpretations of strong and conditional [weak] recommendations). INTENDED AUDIENCE Maternal-fetal medicine specialists, obstetricians, radiologists, sonographers, family physicians, nurses, midwives, residents, and other health care providers who care for women with monochorionic twin or higher order multiple pregnancies. TWEETABLE ABSTRACT Canadian (SOGC) guidelines for the diagnosis, ultrasound surveillance and management of monochorionic twin pregnancy complications, including TTTS, TAPS, sFGR (sIUGR), acardiac (TRAP), monoamniotic twins and intrauterine death of one MC twin. SUMMARY STATEMENTS RECOMMENDATIONS.
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da Silva Rocha J, Guedes-Martins L, Cunha A. Twin Anemia-Polycythemia Sequence (TAPS): From Basic Research to Clinical Practice. Curr Vasc Pharmacol 2023; 21:91-105. [PMID: 36718965 DOI: 10.2174/1570161121666230131112930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 02/01/2023]
Abstract
Twin pregnancy is associated with an increased risk of perinatal and maternal complications, and early establishment of the chorionicity type defines this risk. In monochorionic (MC) pregnancies, the fetuses share the same placental mass and exhibit vascular anastomoses crossing the intertwin membrane, and the combination and pattern of anastomoses determine the primary clinical picture and occurrence of future complications. Twin Anemia-Polycythemia Sequence (TAPS) was first described in 2006 after fetoscopic laser surgery in twin-to-twin transfusion syndrome (TTTS) twins, and in 2007, the first spontaneous cases were reported, recognizing TAPS as an individualized vascular identity in fetofetal transfusion syndromes. There are two types of TAPS: spontaneous (3-5%) and iatrogenic or postlaser (2-16%). TAPS consists of small diameter arteriovenous anastomoses (<1 mm) and low-rate, small-caliber AA anastomoses in the absence of amniotic fluid discordances. There are certain antenatal and postnatal diagnostic criteria, which have progressively evolved over time. New, additional secondary markers have been proposed, and their reliability is being studied. The best screening protocol for TAPS in MC twins is still a matter of debate. This review provides a survey of the relevant literature on the epidemiology, vascular pathophysiology, underlying hemodynamic factors that regulate mismatched vascular connections, and diagnostic criteria of this condition. The aim is to increase awareness and knowledge about this recently identified and frequently unrecognized and misdiagnosed pathology.
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Affiliation(s)
- Joana da Silva Rocha
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto 4050-313, Portugal
| | - Luís Guedes-Martins
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto 4050-313, Portugal
- Centro Hospitalar Universitário do Porto EPE, Centro Materno Infantil do Norte, Centro de Medicina Fetal, Serviço de Obstetrícia, Departamento da Mulher e da Medicina Reprodutiva, Largo Prof. Abel Salazar, Porto 4099-001, Portugal
- Unidade de Investigação e Formação - Centro Materno Infantil do Norte, Porto 4099-001, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-319 Portugal
| | - Ana Cunha
- Centro Hospitalar Universitário do Porto EPE, Centro Materno Infantil do Norte, Centro de Medicina Fetal, Serviço de Obstetrícia, Departamento da Mulher e da Medicina Reprodutiva, Largo Prof. Abel Salazar, Porto 4099-001, Portugal
- Unidade de Investigação e Formação - Centro Materno Infantil do Norte, Porto 4099-001, Portugal
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de Sainte Fare A, Bedei I, Wolter A, Schenk J, Widriani E, Keil C, Koehler S, Bahlmann F, Strizek B, Gembruch U, Berg C, Axt-Fliedner R. The Value of Delta Middle Cerebral Artery Peak Systolic Velocity for the Prediction of Twin Anemia-Polycythemia Sequence-Analysis of a Heterogenous Cohort of Monochorionic Twins. J Clin Med 2022; 11:jcm11247541. [PMID: 36556157 PMCID: PMC9783345 DOI: 10.3390/jcm11247541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
Introduction: Twin anemia-polycythemia sequence (TAPS) is a complication in monochorionic-diamniotic (MCDA) twin pregnancies. This study analyzes whether the prenatal diagnosis using delta middle cerebral artery-peak systolic velocity (MCA-PSV) > 0.5 multiples of the median (MoM) (delta group) detects more TAPS cases than the guideline-based diagnosis using the MCA-PSV cut off levels of >1.5 and <1.0 MoM (cut-off group), in a heterogenous group of MCDA twins. Methods: A retrospective analysis of 348 live-born MCDA twin pregnancies from 2010 to 2021 with available information on MCA-PSV within one week before delivery and hemoglobin-values within 24 h postnatally were considered eligible. Results: Among postnatal confirmed twin pairs with TAPS, the cut-off group showed lower sensitivity than the delta group (33% vs. 82%). Specificity proved higher in the cut-off group with 97% than in the delta group at 86%. The risk that a TAPS is mistakenly not recognized prenatally is higher in the cut-off group than in the delta group (52% vs. 18%). Conclusions: Our data shows that delta MCA-PSV > 0.5 MoM detects more cases of TAPS, which would not have been diagnosed prenatally according to the current guidelines. In the collective examined in the present study, TAPS diagnostics using delta MCA-PSV proved to be a more robust method.
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Affiliation(s)
- Anthea de Sainte Fare
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Giessen, 35392 Giessen, Germany
- Correspondence: ; Tel.: +49-17-68458-5617
| | - Ivonne Bedei
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Giessen, 35392 Giessen, Germany
| | - Aline Wolter
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Giessen, 35392 Giessen, Germany
| | - Johanna Schenk
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Giessen, 35392 Giessen, Germany
| | - Ellydda Widriani
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Giessen, 35392 Giessen, Germany
| | - Corinna Keil
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Marburg, 35041 Marburg, Germany
| | - Siegmund Koehler
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Marburg, 35041 Marburg, Germany
| | - Franz Bahlmann
- Department of Ultrasound Diagnostics and Prenatal Medicine, Buergerhospital Frankfurt, 60318 Frankfurt, Germany
| | - Brigitte Strizek
- Department of Obstetrics and Prenatal Medicine, University Hospital Bonn, 53127 Bonn, Germany
| | - Ulrich Gembruch
- Department of Obstetrics and Prenatal Medicine, University Hospital Bonn, 53127 Bonn, Germany
| | - Christoph Berg
- Department of Obstetrics and Prenatal Medicine, University Hospital Bonn, 53127 Bonn, Germany
- Department of Prenatal Medicine and Gynaecological Ultrasound, University Hospital Cologne, 50937 Cologne, Germany
| | - Roland Axt-Fliedner
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Giessen, 35392 Giessen, Germany
- Department of Prenatal Medicine and Fetal Therapy, University Hospital Marburg, 35041 Marburg, Germany
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Mustafa HJ, Cermak R, Pedersen N, Harman C, Turan OM. Perinatal outcomes of pregnancies with twin-anemia polycythemia sequence complicating twin-to-twin transfusion syndrome using different twin-anemia polycythemia sequence diagnostic criteria. Prenat Diagn 2022; 42:985-993. [PMID: 35686505 DOI: 10.1002/pd.6195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/01/2022] [Accepted: 06/04/2022] [Indexed: 11/10/2022]
Abstract
OBJECTIVE To investigate whether the presence of twin-anemia polycythemia sequence (TAPS) with twin-to-twin transfusion syndrome (TTTS) or post-laser TAPS would change outcomes using different TAPS diagnostic criteria. METHODS TTTS cases undergoing laser surgery between 2012 and 2020 were included. Groups included pre-laser TTTS-only compared to TTTS + TAPS, and no post-laser TAPS compared to post-laser TAPS. Three prenatal TAPS diagnostic criteria were used: group A: middle cerebral artery-peak systolic velocity (MCA-PSV) > 1.5 MoM in one twin and <1 MoM in the other twin, group B: inter-twin MCA-PSV difference >1 MoM, and group C: inter-twin MCA-PSV difference >0.5 MoM. Perinatal outcomes including survival and severe cerebral injury were investigated. RESULTS 174 laser procedures were included. TTTS + TAPS cases were 16 in group A, 17 in group B, and 29 in group C. Post-laser TAPS cases were 11 in group A, 6 in group B, and 12 in group C. There were no differences in preoperative, operative variables and outcomes including survival and severe cerebral injury between groups using all three TAPS diagnostic criteria. The incidence of TTTS + TAPS was highest in group C (16.7%), then group B (9.8%), followed by group A (9.2%). The incidence of post-laser TAPS was highest in group C (9%), then group A (8.3%), followed by group B (4.5%). CONCLUSION Presence of TAPS complicating TTTS and presence of post-laser TAPS do not seem to be associated with worse perinatal outcomes including postnatal-ultrasound detected cerebral injury using three different TAPS criteria. Collaborative studies are needed to investigate the validity and the performance of different TAPS criteria.
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Affiliation(s)
- Hiba J Mustafa
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Rachel Cermak
- University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Nicole Pedersen
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Christopher Harman
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Ozhan M Turan
- Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Baschat AA, Miller JL. Pathophysiology, diagnosis, and management of twin anemia polycythemia sequence in monochorionic multiple gestations. Best Pract Res Clin Obstet Gynaecol 2022; 84:115-126. [PMID: 35450772 DOI: 10.1016/j.bpobgyn.2022.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/11/2022] [Indexed: 11/02/2022]
Abstract
Twin anemia polycythemia sequence (TAPS) is a consequence of unequal sharing of red blood cells between monochorionic twins resulting in anemia in the donor and polycythemia in the recipient twin. Prenatally TAPS can occur spontaneously or complicate incomplete laser surgery for twin transfusion syndrome. While there may be clinical overlap with twin transfusion syndrome or selective fetal growth restriction, diagnosis relies on Doppler measurement of middle cerebral artery peak systolic velocities. Significantly discordant velocities are diagnostic, while severity staging is based on signs of cardiovascular compromise. Conservative management, fetoscopic laser coagulation, selective twin reduction, fetal blood and exchange transfusion, and delivery may be selected guided by the gestational age of diagnosis, the severity of the condition, the likelihood of success, and the patients' priorities. Prenatal curative treatment that minimizes the risk for prematurity and residual morbidity at birth is most likely to offer the greatest short-term and long-term benefits.
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Affiliation(s)
- Ahmet A Baschat
- Johns Hopkins Center for Fetal Therapy, Department of Gynecology & Obstetrics, USA.
| | - Jena L Miller
- Johns Hopkins Center for Fetal Therapy, Department of Gynecology & Obstetrics, USA
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Hochberg A, Silber R, Avnet H, Rosen H, Katorza E, Hoffmann C, Mazkereth R, Lipitz S, Weisz B, Yinon Y. Fetal and neonatal brain lesions following laser ablation for twin-to-twin-transfusion-syndrome as detected by pre- and post-natal brain imaging. Prenat Diagn 2021; 41:1531-1540. [PMID: 34671994 DOI: 10.1002/pd.6061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/25/2021] [Accepted: 10/15/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To determine the rate of and risk factors for fetal and neonatal brain lesions following laser ablation for twin-to-twin transfusion syndrome (TTTS). METHODS A retrospective cohort study of 83 women with monochorionic twin pregnancies who underwent ablation for TTTS at a single tertiary hospital. Post-laser survivors were followed-up with fetal neurosonogram every 2 weeks and fetal brain MRI at 28-32 weeks of gestation; post-natal brain imaging included neurosonogram. Cases with pre- and post-natal brain lesions were compared to those without. RESULTS 153 fetuses survived the immediate post-laser period and underwent brain imaging. Of these, 17 (11.11%) exhibited brain lesions on prenatal imaging studies, and 36 (32.4%) on post-natal ultrasound. Later gestational age (GA) at the time of ablation (23.0 vs. 21.4 weeks, p = 0.0244), post-laser twin-anemia-polycythemia-sequence (TAPS) (29.41% vs. 9.56%, p = 0.035) and birthweight discordancy (30% vs. 9%, p = 0.0025) were associated with prenatal brain lesions. Earlier GA at delivery (31.0 weeks vs. 32.2, p = 0.0002) and post-laser TAPS (25% vs. 9.33%, p = 0.038) were associated with post-natal brain lesions. CONCLUSIONS Survivors of ablation for TTTS are at risk for brain lesions, which can be detected prenatally. Incorporation of neurosonogram and fetal brain MRI into the routine surveillance of such pregnancies should be considered.
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Affiliation(s)
- Alyssa Hochberg
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ronit Silber
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hagai Avnet
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hadar Rosen
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eldad Katorza
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Gertner Institute of Epidemiology & Health Policy Research, Sheba Medical Center, Tel-Hashomer, Israel
| | - Chen Hoffmann
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Department of Radiology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Ram Mazkereth
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Neonatology, Edmond and Lily Safra Children Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Shlomo Lipitz
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Boaz Weisz
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yoav Yinon
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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11
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Khalil A, Liu B. Controversies in the management of twin pregnancy. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 57:888-902. [PMID: 32799348 DOI: 10.1002/uog.22181] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/18/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Despite many advances in antenatal care, twin pregnancies still experience more adverse outcomes, in particular perinatal morbidity and mortality. They also pose a multitude of challenges and controversies, as outlined in this Review. Moreover, they are less likely to be included in clinical trials. Many issues on classification and management remain under debate. Efforts at standardizing diagnostic criteria, monitoring protocols, management and outcome reporting are likely to reduce their perinatal risks. The top 10 most important research uncertainties related to multiple pregnancies have been identified by both clinicians and patients. More robust research in the form of randomized trials and large well-conducted prospective cohort studies is needed to address these controversies. © 2020 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- A Khalil
- Twins Trust Centre for Research and Clinical Excellence, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
| | - B Liu
- Twins Trust Centre for Research and Clinical Excellence, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
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12
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Abstract
Twin to twin transfusion syndrome (TTTS) is a common complication that typically presents in the second trimester of pregnancy in 10-15% of monochorionic twins due to net transfer of volume and hormonal substances from one twin to the other across vascular anastomoses on the placenta. Without recognition and treatment, TTTS is the greatest contributor to fetal loss prior to viability in 90-100% of advanced cases. Ultrasound diagnosis of monochorionicity is most reliable in the first trimester and sets the monitoring strategy for this type of twins. The diagnosis of TTTS is made by ultrasound with the findings of polyhydramnios due to volume overload and polyuria in one twin and oligohydramnios due to oliguria of the co-twin. Assessment of bladder filling as well as arterial and venous Doppler patterns are required for staging disease severity. Assessment of fetal cardiac function also provides additional insight into the fetal cardiovascular impacts of the disease as well as help identify fetuses that may require postnatal follow up. Fetoscopic laser ablation of the communicating vascular anastomoses between the twins is the standard treatment for TTTS. It aims to cure the condition by interrupting the link between their circulations and making them independent of one another. Contemporary outcome data after laser surgery suggests survival for both fetuses can be anticipated in up to 65% of cases and survival of a single fetus in up to 88% of cases. However, preterm birth remains a significant contributor to postnatal morbidity and mortality. Long term outcomes of TTTS survivors indicate that up to 11% of children may show signs of neurologic impairment. Strategies to minimize preterm birth after treatment and standardized reporting by laser centers are important considerations to improve overall outcomes and understand the long-term impacts of TTTS.
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Affiliation(s)
- Jena L Miller
- The Johns Hopkins Center for Fetal Therapy, Department of Gynecology and Obstetrics, Johns Hopkins University, Baltimore, MD, USA
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13
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Twin Anemia Polycythemia Sequence: Knowledge and Insights After 15 Years of Research. MATERNAL-FETAL MEDICINE 2021. [DOI: 10.1097/fm9.0000000000000065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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14
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Khalil A, Gordijn S, Ganzevoort W, Thilaganathan B, Johnson A, Baschat AA, Hecher K, Reed K, Lewi L, Deprest J, Oepkes D, Lopriore E. Consensus diagnostic criteria and monitoring of twin anemia-polycythemia sequence: Delphi procedure. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2020; 56:388-394. [PMID: 31605505 DOI: 10.1002/uog.21882] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 09/22/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVES Twin anemia-polycythemia sequence (TAPS) is associated with increased perinatal morbidity and mortality. Inconsistencies in the diagnostic criteria for TAPS exist, which hinder the ability to establish robust evidence-based management or monitoring protocols. The main aim of this study was to determine, by expert consensus using a Delphi procedure, the key diagnostic features and optimal monitoring approach for TAPS. METHODS A Delphi process was conducted among an international panel of experts on TAPS. Panel members were provided with a list of literature-based parameters for diagnosing and monitoring TAPS. They were asked to rate the importance of the parameters on a five-point Likert scale. Consensus was sought to determine the cut-off values for accepted parameters, as well as parameters used in the monitoring of and assessment of outcome in twin pregnancy complicated by TAPS. RESULTS A total of 132 experts were approached. Fifty experts joined the first round, of whom 33 (66%) completed all three rounds. There was agreement that the monitoring interval for the development of TAPS should be every 2 weeks and that the severity should be assessed antenatally using a classification system based on middle cerebral artery (MCA) peak systolic velocity (PSV), but there was no agreement on the gestational age at which to start monitoring. Once the diagnosis of TAPS is made, monitoring should be scheduled weekly. For the antenatal diagnosis of TAPS, the combination of MCA-PSV ≥ 1.5 MoM in the anemic twin and ≤ 0.8 MoM in the polycythemic twin was agreed. Alternatively, MCA-PSV discordance ≥ 1 MoM can be used to diagnose TAPS. Postnatally, hemoglobin difference ≥ 8 g/dL and intertwin reticulocyte ratio ≥ 1.7 were agreed criteria for diagnosis of TAPS. There was no agreement on the cut-off of MCA-PSV or its discordance for prenatal intervention. The panel agreed on prioritizing perinatal and long-term survival outcomes in follow-up studies. CONCLUSIONS Consensus-based diagnostic features of TAPS, as well as cut-off values for the parameters involved, were agreed upon by a panel of experts. Future studies are needed to validate these diagnostic features before they can be used in clinical trials of interventions. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- A Khalil
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Twins Trust Centre for Research and Clinical Excellence, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
| | - S Gordijn
- Department of Obstetrics and Gynecology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - W Ganzevoort
- Department of Obstetrics and Gynecology, Academic Medical Center Amsterdam, University of Amsterdam, Amsterdam, The Netherlands
| | - B Thilaganathan
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - A Johnson
- Departments of Obstetrics/Gynecology & Pediatric Surgery, The University of Texas Health Science Center, The Fetal Center, Children's Memorial Hermann Hospital, Houston, TX, USA
| | - A A Baschat
- The Johns Hopkins Center for Fetal Therapy, Baltimore, MD, USA
| | - K Hecher
- Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - K Reed
- Twins Trust, Aldershot, UK
| | - L Lewi
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - J Deprest
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - D Oepkes
- Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - E Lopriore
- Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
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Performance of Antenatal Diagnostic Criteria of Twin-Anemia-Polycythemia Sequence. J Clin Med 2020; 9:jcm9092754. [PMID: 32858863 PMCID: PMC7563169 DOI: 10.3390/jcm9092754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/27/2020] [Accepted: 08/14/2020] [Indexed: 12/11/2022] Open
Abstract
This study aims to elicit the validation performance of different diagnostic criteria and to evaluate the disease course and perinatal outcomes of pregnancies complicated by twin anemia polycythemia sequence (TAPS). Monochorionic diamniotic (MCDA) twin pregnancies who received serial middle cerebral artery (MCA) peak systolic velocity (PSV) measurements without non-TAPS-related demise or major anomalies were included. Course of disease, antenatal intervention, additional ultrasound features, and perinatal outcomes were compared between each criteria and onset. Forty-nine cases of TAPS and 203 non-TAPS controls were identified. The incidence of TAPS was 19.2%, 15.7%, 7.8%, and 6.3% for ΔPSV MoM > 0.373, ΔPSV MoM > 0.5, traditional, and Delphi consensus criteria, respectively (p < 0.001). The incidence of antenatal intervention was 55.1, 62.5, 75.0, and 87.5%, respectively. Furthermore, cases detected according to the Delphi consensus criteria had a higher rate of progression or intervention compared to cases detected with ΔPSV MoM > 0.373 (87.0 vs. 59.0%, p = 0.037). TAPS had a significantly higher birth weight discordance than uncomplicated MCDA twins (25.3 vs. 7.3%, p < 0.001). Application of four different diagnostic criteria for TAPS leads to significant differences in the incidence, severity, and antenatal intervention. The Delphi criteria identified more severe cases likely to require intervention, and the delta PSV > 0.373 criteria identified milder cases, without a significant impact on neonatal outcomes.
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16
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Brock CO, Bergh EP, Moise, KJ, Johnson A, Hernandez-Andrade E, Lai D, Papanna R. Middle Cerebral Artery Doppler Velocimetry for the Diagnosis of Twin Anemia Polycythemia Sequence: A Systematic Review. J Clin Med 2020; 9:jcm9061735. [PMID: 32512796 PMCID: PMC7355756 DOI: 10.3390/jcm9061735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/23/2020] [Accepted: 06/03/2020] [Indexed: 01/01/2023] Open
Abstract
Twin anemia polycythemia sequence (TAPS) is a rare complication of monochorionic diamniotic (MCDA) twins. Middle cerebral artery peak systolic velocity (MCA-PSV) measurements are used to screen for TAPS while fetal or neonatal hemoglobin levels are required for definitive diagnosis. We sought to perform a systematic review of the efficacy of MCA-PSV in diagnosing TAPS. Search criteria were developed using relevant terms to query the Pubmed, Embase, and SCOPUS electronic databases. Publications reporting diagnostic characteristics of MCA-PSV measurements (i.e., sensitivity, specificity or receiver operator curves) were included. Each article was assessed for bias using the Quality Assessment of Diagnostic Accuracy Studies II (QUADAS II) tool. Results were assessed for uniformity to determine whether meta-analysis was feasible. Data were presented in tabular form. Among publications, five met the inclusion criteria. QUADAS II analysis revealed that four of the publications were highly likely to have bias in multiple areas. Meta-analysis was precluded by non-uniformity between definitions of TAPS by MCA-PSV and neonatal or fetal hemoglobin levels. High-quality prospective studies with consistent definitions and ultrasound surveillance protocols are still required to determine the efficacy of MCA-PSV in diagnosing TAPS. Other ultrasound findings (e.g., placenta echogenicity discordance) may augment Doppler studies.
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Affiliation(s)
- Clifton O. Brock
- Department of Obstetrics, Gynecology, and Reproductive Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; (C.O.B.); (E.P.B.); (K.J.M.J.); (A.J.); (E.H.-A.)
| | - Eric P. Bergh
- Department of Obstetrics, Gynecology, and Reproductive Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; (C.O.B.); (E.P.B.); (K.J.M.J.); (A.J.); (E.H.-A.)
- The Fetal Center Children’s Memorial Hermann Hospital, Houston, TX 77030, USA
| | - Kenneth J. Moise,
- Department of Obstetrics, Gynecology, and Reproductive Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; (C.O.B.); (E.P.B.); (K.J.M.J.); (A.J.); (E.H.-A.)
- The Fetal Center Children’s Memorial Hermann Hospital, Houston, TX 77030, USA
| | - Anthony Johnson
- Department of Obstetrics, Gynecology, and Reproductive Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; (C.O.B.); (E.P.B.); (K.J.M.J.); (A.J.); (E.H.-A.)
- The Fetal Center Children’s Memorial Hermann Hospital, Houston, TX 77030, USA
| | - Edgar Hernandez-Andrade
- Department of Obstetrics, Gynecology, and Reproductive Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; (C.O.B.); (E.P.B.); (K.J.M.J.); (A.J.); (E.H.-A.)
| | - Dejian Lai
- Division of Biostatistics, University of Texas, School of Public Health, 1200 Pressler St, Houston, TX 77030, USA;
| | - Ramesha Papanna
- Department of Obstetrics, Gynecology, and Reproductive Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; (C.O.B.); (E.P.B.); (K.J.M.J.); (A.J.); (E.H.-A.)
- The Fetal Center Children’s Memorial Hermann Hospital, Houston, TX 77030, USA
- Correspondence: ; Tel.: +1-713-500-5859; Fax: +1-713-500-0799
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Xu J, Duan AQ, Marini D, Lim JM, Keunen J, Portnoy S, Sled JG, McCrindle BW, Kingdom J, Macgowan CK, Seed M. The utility of MRI for measuring hematocrit in fetal anemia. Am J Obstet Gynecol 2020; 222:81.e1-81.e13. [PMID: 31306649 DOI: 10.1016/j.ajog.2019.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND Doppler ultrasound measurements of the peak systolic velocity of the middle cerebral artery can be used to noninvasively diagnose fetal anemia but are less precise following fetal blood transfusion and in late gestation. We have previously demonstrated the feasibility of estimating fetal hematocrit in vitro using magnetic resonance imaging relaxation times. Here we report the use of magnetic resonance imaging as a noninvasive tool to accurately detect fetal anemia in vivo. OBJECTIVES This study has 2 objectives: (1) to determine the feasibility and accuracy of magnetic resonance imaging in estimating hematocrit in anemic fetuses and (2) to compare magnetic resonance imaging and middle cerebral artery Doppler in detecting moderate to severe fetal anemia. STUDY DESIGN Fetuses undergoing fetal blood sampling or transfusion underwent magnetic resonance imaging examinations prior to and following their procedures at 1.5 Tesla (Siemens Avanto). A modified Look-Locker inversion pulse sequence and T2 preparation sequence were applied for T1 and T2 mapping of the intrahepatic umbilical vein. Estimated fetal hematocrit was calculated using a combination of T1 and T2 values and compared with conventional hematocrit obtained from fetal blood samples and middle cerebral artery Doppler measurements. RESULTS Twenty-three fetuses were assessed during 33 magnetic resonance imaging scans. The mean absolute difference between the laboratory and magnetic resonance imaging-estimated hematocrit was 0.06 ± 0.05 with a correlation of 0.77 (P < .001) determined by a multilevel, mixed-effects model adjusting for the repeated measurements from the same participants, multiple gestation pregnancies, and the scan type (ie, before or after transfusion scan). Bland-Altman analysis revealed a systematic bias of -0.03 between the magnetic resonance imaging and fetal blood sampling measurements. Magnetic resonance imaging and middle cerebral artery Doppler had similar sensitivities of approximately 90% to detect moderate to severe anemia. However, magnetic resonance imaging had a higher specificity (93% [13/14], 95% confidence interval, 66-100%) than Doppler (71% [10/14], 95% confidence interval, 42-92%). CONCLUSION Moderate to severe fetal anemia can be detected noninvasively by magnetic resonance imaging with high sensitivity and specificity. Our results suggest an adjunct role for magnetic resonance imaging in fetuses with suspected anemia, particularly following previous transfusion and in late gestation.
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Nicholas L, Fischbein R, Aultman J, Ernst-Milner S. Dispelling Myths about Antenatal TAPS: A Call for Action for Routine MCA-PSV Doppler Screening in the United States. J Clin Med 2019; 8:jcm8070977. [PMID: 31277521 PMCID: PMC6678166 DOI: 10.3390/jcm8070977] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/29/2019] [Accepted: 07/01/2019] [Indexed: 12/28/2022] Open
Abstract
In the United States, routine middle cerebral artery peak systolic velocity (MCA-PSV) Doppler screening for the detection of antenatal twin anemia-polycythemia sequence (TAPS) is not recommended. The current and only national clinical guideline from the highly-influential Society for Maternal-Fetal Medicine states that, “There is no evidence that monitoring for TAPS with MCA PSV Doppler at any time, including > 26 weeks, improves outcomes, so that this additional screening cannot be recommended at this time.” We argue this recommendation has disproportionate influence on patients and the care they are offered and receive. We use current evidence to highlight and dispel pervasive myths surrounding antenatal TAPS and the value of routine MCA-PSV screening. An ethical framework that illustrates the importance of giving patients the opportunity for routine screening is presented. Findings demonstrate that: (1) both spontaneous and post-laser TAPS is a serious, potentially life-threatening complication, (2) treatment for TAPS is effective and includes expectant management, intrauterine transfusion (IUT), or surgery, (3) and routine MCA-PSV, which has satisfactory diagnostic accuracy, is currently the only way to provide early detection of TAPS. We conclude that routine TAPS screening is a medically proven valuable resource that should be offered to patients in need and to the clinicians who are trying to act toward their benefit.
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Affiliation(s)
- Lauren Nicholas
- Department of Social Sciences, D'Youville College, 591 Niagara Street, Buffalo, NY 14201, USA.
| | - Rebecca Fischbein
- Department of Community and Family Medicine, Northeast Ohio Medical University, 4209 State Route 44, PO Box 95, Rootstown, Ohio 44272, USA
| | - Julie Aultman
- Department of Community and Family Medicine, Northeast Ohio Medical University, 4209 State Route 44, PO Box 95, Rootstown, Ohio 44272, USA
| | - Stephanie Ernst-Milner
- Twin Anaemia Polycythemia Sequence (TAPS) Support Group, TAPS Patient Advocate, 1326HS Almere, The Netherlands
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19
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Tavares de Sousa M, Fonseca A, Hecher K. Role of fetal intertwin difference in middle cerebral artery peak systolic velocity in predicting neonatal twin anemia-polycythemia sequence. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 53:794-797. [PMID: 30207009 DOI: 10.1002/uog.20116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To evaluate the relationship between the fetal intertwin difference in middle cerebral artery peak systolic velocity (MCA-PSV) and intertwin difference in hemoglobin (Hb) concentration at birth in monochorionic diamniotic (MCDA) twin pregnancies in order to assess its potential role in the prediction of twin anemia-polycythemia sequence (TAPS). METHODS This was a retrospective cohort study of MCDA twin pregnancies delivered between January 2012 and January 2018. All pregnancies with measurements of MCA-PSV within 7 days prior to delivery and in which neonatal Hb concentration was available were included. The correlation between fetal intertwin difference in MCA-PSV, expressed in multiples of the median (MoM), and neonatal intertwin difference in Hb concentration was investigated. Receiver-operating characteristics (ROC) curve analysis was used to assess the performance of fetal intertwin difference in MCA-PSV for predicting intertwin difference in Hb > 90th centile at birth. RESULTS A total of 154 out of 256 MC twin pregnancies fulfilled the inclusion criteria. Fetal intertwin difference in MCA-PSV MoM correlated positively with neonatal intertwin difference in Hb concentration (r = 0.79; P < 0.001). The 90th centile for intertwin difference in Hb was 7.25 g/dL. There were 15 (9.7%) cases with a Hb difference ≥ 7.25 g/dL at birth. ROC curve analysis showed a high accuracy of fetal intertwin MCA-PSV MoM difference for the prediction of neonatal intertwin Hb difference ≥ 7.25 g/dL at birth (area under the ROC curve, 0.976 (95% CI, 0.935-0.993); P = 0.012). The optimal cut-off for intertwin MCA-PSV MoM difference was 0.373, with a sensitivity of 93.3% (95% CI, 68.1-99.8%) and a specificity of 95.7% (95% CI, 90.8-98.4%). The positive predictive value was 70% (95% CI, 45.7-88.1%) and the negative predictive value was 99.3% (95% CI, 95.9-100%). CONCLUSION Our findings show that fetal intertwin MCA-PSV MoM difference is a good predictor of neonatal intertwin Hb concentration difference > 90th centile and potentially of TAPS. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- M Tavares de Sousa
- Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Fonseca
- Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Obstetrics, Gynecology and Reproductive Medicine, Santa Maria University Hospital, Lisbon, Portugal
| | - K Hecher
- Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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20
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Tollenaar LSA, Lopriore E, Middeldorp JM, Haak MC, Klumper FJ, Oepkes D, Slaghekke F. Improved prediction of twin anemia-polycythemia sequence by delta middle cerebral artery peak systolic velocity: new antenatal classification system. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 53:788-793. [PMID: 30125414 PMCID: PMC6593803 DOI: 10.1002/uog.20096] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/27/2018] [Accepted: 08/08/2018] [Indexed: 06/01/2023]
Abstract
OBJECTIVES To investigate the diagnostic accuracy of delta middle cerebral artery peak systolic velocity (MCA-PSV) > 0.5 multiples of the median (MoM) and compare its predictive value with that of the current MCA-PSV cut-off values of > 1.5 MoM in the donor and < 1.0 MoM in the recipient, for the diagnosis of twin anemia-polycythemia sequence (TAPS) in monochorionic twin pregnancy. METHODS This was a retrospective consecutive cohort study comprising all uncomplicated monochorionic twin pregnancies and twin pregnancies with a postnatal diagnosis of TAPS managed between 2003 and 2017 in the Dutch national referral center for fetal therapy. Cases with incomplete MCA-PSV Doppler measurements 1 week prior to delivery or with incomplete hemoglobin measurements within 1 day after birth were excluded. The postnatal diagnosis of TAPS was based on an intertwin hemoglobin difference > 8 g/dL and at least one of the following: reticulocyte count ratio > 1.7 or presence of minuscule anastomoses on the placental surface. We compared the predictive accuracy of the current diagnostic method using MCA-PSV cut-off values of > 1.5 MoM in the donor and < 1.0 MoM in the recipient with that of a new method based on intertwin difference in MCA-PSV > 0.5 MoM for prediction of TAPS. RESULTS In total, 45 uncomplicated and 35 TAPS monochorionic twin pregnancies were analyzed. The sensitivity and specificity of the cut-off MCA-PSV values (donor > 1.5 MoM, recipient < 1.0 MoM) to predict TAPS was 46% (95% CI, 30-62%) and 100% (95% CI, 92-100%), respectively; positive predictive value was 100% (95% CI, 81-100%) and negative predictive value 70% (95% CI, 58-80%). Delta MCA-PSV showed a sensitivity of 83% (95% CI, 67-92%) and a specificity of 100% (95% CI, 92-100%); the positive and negative predictive values were 100% (95% CI, 88-100%) and 88% (95% CI, 77-94%), respectively. Of the 35 cases with TAPS diagnosed postnatally, 13 twin pairs showed a delta MCA-PSV > 0.5 MoM but did not fulfill the cut-off MCA-PSV criteria. Of these 13 TAPS twins, nine donors and four recipients had normal MCA-PSV values. There was a high correlation between delta MCA-PSV and intertwin difference in hemoglobin level (R = 0.725, P < 0.01). CONCLUSION Delta MCA-PSV > 0.5 MoM has a greater diagnostic accuracy for predicting TAPS compared to the current MCA-PSV cut-off criteria. We therefore propose a new antenatal classification system for TAPS. In monochorionic twin pregnancies with delta MCA-PSV > 0.5 MoM on Doppler ultrasound, but normal MCA-PSV values in the donor or recipient, obstetricians should be aware of the therapeutic implications and neonatal morbidities associated with TAPS. © 2018 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of the International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- L. S. A. Tollenaar
- Division of Fetal Medicine, Department of ObstetricsLeiden University Medical CenterLeidenThe Netherlands
| | - E. Lopriore
- Division of Neonatology, Department of PediatricsLeiden University Medical CenterLeidenThe Netherlands
| | - J. M. Middeldorp
- Division of Fetal Medicine, Department of ObstetricsLeiden University Medical CenterLeidenThe Netherlands
| | - M. C. Haak
- Division of Fetal Medicine, Department of ObstetricsLeiden University Medical CenterLeidenThe Netherlands
| | - F. J. Klumper
- Division of Fetal Medicine, Department of ObstetricsLeiden University Medical CenterLeidenThe Netherlands
| | - D. Oepkes
- Division of Fetal Medicine, Department of ObstetricsLeiden University Medical CenterLeidenThe Netherlands
| | - F. Slaghekke
- Division of Fetal Medicine, Department of ObstetricsLeiden University Medical CenterLeidenThe Netherlands
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Zilliox M, Koch A, Favre R, Sananes N. Unusual twin anemia-polycythemia sequence in a dichorionic diamniotic pregnancy. J Gynecol Obstet Hum Reprod 2019; 48:359-361. [PMID: 30794958 DOI: 10.1016/j.jogoh.2019.02.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 02/12/2019] [Accepted: 02/19/2019] [Indexed: 10/27/2022]
Affiliation(s)
- M Zilliox
- Maternal Fetal Medicine Department, Strasbourg University Hospital, Strasbourg, France; Centre Médico-Chirugical et Obstétrical, 19A rue Louis Pasteur, 67300 Schiltigheim, France
| | - A Koch
- Maternal Fetal Medicine Department, Strasbourg University Hospital, Strasbourg, France; Hôpital de Hautepierre, 1 Avenue Molière, 67000 Strasbourg, France
| | - R Favre
- Maternal Fetal Medicine Department, Strasbourg University Hospital, Strasbourg, France; Centre Médico-Chirugical et Obstétrical, 19A rue Louis Pasteur, 67300 Schiltigheim, France
| | - N Sananes
- Maternal Fetal Medicine Department, Strasbourg University Hospital, Strasbourg, France; Hôpital de Hautepierre, 1 Avenue Molière, 67000 Strasbourg, France; Centre Médico-Chirugical et Obstétrical, 19A rue Louis Pasteur, 67300 Schiltigheim, France; INSERM UMR-S 1121 "Biomaterials and Bioengineering", 11 rue Humann, 67000 Strasbourg, France.
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22
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Kutuk MS, Dolanbay M, Gokmen Karasu AF, Ozgun MT. Relationship between fetal peak systolic velocity in Middle cerebral artery and umbilical blood gas values and hemoglobin levels in diabetic pregnant women. JOURNAL OF CLINICAL ULTRASOUND : JCU 2018; 46:391-396. [PMID: 29582442 DOI: 10.1002/jcu.22593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 01/22/2018] [Accepted: 03/11/2018] [Indexed: 06/08/2023]
Abstract
PURPOSE To assess the relationship between peak systolic velocity in the middle cerebral artery (MCA-PSV) and fetal hypoxia in diabetic pregnant women requiring insulin therapy. METHODS The data of diabetic pregnant women using insulin who were followed in our departments were reviewed retrospectively. The relationships between MCA-PSV and umbilical cord pO2, pCO2, base deficit, hemoglobin, and birth weight were analyzed. RESULTS A total of 120 cases were included in the final analysis. The median (Q1 - Q3 ) gestational age at Doppler evaluation was 37 weeks 3 days (37-38 weeks and 2 days), and the mean ± SD gestational age at delivery was 38 weeks 4 days ± 3days. The mean ± SD hemoglobin A1c (HbA1c) level was 5.7% ± 1.0% and, median (Q1 -Q3 ) daily total insulin dose was 25 U (10U-48U). There was no statistically significant correlation between MCA-PSV and pH, PO2, PCO2, base deficit, Hb, and birth weight (Spearman correlation, r:-.001[P = .99], r:-.011[P = .90], r:-.052 [P = .51], r: .049[P = .59], r: .049 [P = .59], r: .030 [P = .75], respectively). Using binary logistic regression analysis, no independent factor for the prediction of fetal acidosis (venous pH < 7.23), and metabolic acidosis (base deficit >6.3 mmol/L) was detected. CONCLUSION MCA-PSV is not a good indicator of fetal polycythemia or chronic hypoxia in fetuses of diabetic pregnant women. Fetal well-being should be monitored with other tools in these circumstances.
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Affiliation(s)
- Mehmet S Kutuk
- Department of Obstetrics and Gynecology, Bezmialem Vakif University, Istanbul, Turkey
| | - Mehmet Dolanbay
- Department of Obstetrics and Gynecology, Erciyes University, Kayseri, Turkey
| | - Ayse F Gokmen Karasu
- Department of Obstetrics and Gynecology, Bezmialem Vakif University, Istanbul, Turkey
| | - Mahmut T Ozgun
- Department of Obstetrics and Gynecology, Erciyes University, Kayseri, Turkey
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Henry A, Gopikrishna S, Mahajan A, Alphonse J, Meriki N, Welsh AW. Use of the Foetal Myocardial Performance Index in monochorionic, diamniotic twin pregnancy: a prospective cohort and nested case-control study. J Matern Fetal Neonatal Med 2018; 32:2017-2029. [DOI: 10.1080/14767058.2018.1424817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Amanda Henry
- School of Women’s and Children’s Health, UNSW Medicine, UNSW, Sydney, Australia
- Department of Women’s and Children’s Health, St. George Hospital, Sydney, Australia
- Department of Maternal Fetal Medicine, Royal Hospital for Women, Sydney, Australia
| | - Saranya Gopikrishna
- School of Women’s and Children’s Health, UNSW Medicine, UNSW, Sydney, Australia
| | - Aditi Mahajan
- School of Women’s and Children’s Health, UNSW Medicine, UNSW, Sydney, Australia
- Royal Prince Alfred Hospital, Camperdown, Sydney, Australia
| | - Jennifer Alphonse
- School of Women’s and Children’s Health, UNSW Medicine, UNSW, Sydney, Australia
| | - Neama Meriki
- Department of Obstetrics and Gynaecology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Maternal Fetal Medicine, King Khalid University Hospital, Riyadh, Saudi Arabia
| | - Alec W. Welsh
- School of Women’s and Children’s Health, UNSW Medicine, UNSW, Sydney, Australia
- Department of Maternal Fetal Medicine, Royal Hospital for Women, Sydney, Australia
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24
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Fisher KE, Welsh AW, Wilson I, Henry A. Uncommon complications of monochorionic twin pregnancies: Twin anaemia-polycythaemia sequence. Australas J Ultrasound Med 2016; 19:56-63. [PMID: 34760444 DOI: 10.1002/ajum.12013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Introduction Twin anaemia-polycythaemia sequence (TAPS) occurs when significant haemoglobin discordance exists between monochorionic fetuses. Most reported cases occur iatrogenically after twin-to-twin transfusion syndrome (TTTS) laser therapy; spontaneous TAPS is also reported. The purpose of this study was to investigate pregnancy management and immediate neonatal outcomes for monochorionic multiple pregnancies complicated by TAPS referred to the NSW Fetal Therapy Centre (FTC). Methods Retrospective cohort study of multiple pregnancies referred to NSW FTC between April 2006 and April 2014. Fourteen TAPS cases [discordant middle cerebral artery peak systolic volume (MCA-PSV) or clinician diagnosis antenatally, or Hb >20 g/dL vs. <12 g/dL post-natally] were compared to an existing TTTS database (n = 142) and uncomplicated monochorionic diamniotic (MCDA) twin pregnancies (n = 45). Outcomes measured were maternal demographics; ultrasound findings at referral; management, including whether in utero fetal therapy was performed; and pregnancy outcome, including gestation at birth, mode of birth, birthweight, fetal/neonatal complications and neonatal survival to discharge. Results The majority of TAPS cases were spontaneous (9/14) and occurred later in pregnancy than TTTS (median gestation at diagnosis 26.0 ± 4.9 vs. 20.4 ± 2.6 weeks, P < 0.001). However, TAPS perinatal outcome was similar to TTTS (survival of both twins 62% vs. 53%, survival of at least one twin 85% vs. 87%, overall survival 73% vs. 70%) and overall survival significantly lower than for uncomplicated MCDA pregnancies (73% vs. 98%, P < 0.001). Conclusion Overall mortality for TAPS was similar to that of TTTS but significantly higher compared to uncomplicated MCDA pregnancies, underscoring the potential severity of TAPS despite its later gestational onset.
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Affiliation(s)
- Katie E Fisher
- School of Women's and Children's Health University of New South Wales Kensington New South Wales Australia
| | - Alec W Welsh
- School of Women's and Children's Health University of New South Wales Kensington New South Wales Australia.,Department of Maternal-Fetal Medicine Royal Hospital for Women Sydney New South Wales Australia.,Australian Centre for Perinatal Science UNSW Medicine Sydney New South Wales Australia
| | - Isabella Wilson
- School of Women's and Children's Health University of New South Wales Kensington New South Wales Australia
| | - Amanda Henry
- School of Women's and Children's Health University of New South Wales Kensington New South Wales Australia.,Department of Maternal-Fetal Medicine Royal Hospital for Women Sydney New South Wales Australia.,Australian Centre for Perinatal Science UNSW Medicine Sydney New South Wales Australia
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