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1.
Red Blood Cell Transfusion in Patients With Placenta Accreta Spectrum: A Systematic Review and Meta-analysis
Miller SE, Leonard SA, Meza PK, Ku S, Ren LY, Lyell DJ, Sultan P, Butwick A
Obstetrics and gynecology. 2023;141(1):49-58
Abstract
OBJECTIVE To evaluate red blood cell use during delivery in patients with placenta accreta spectrum. DATA SOURCES We searched MEDLINE, EMBASE, CINAHL, Cochrane Central, ClinicalTrials.gov, and Scopus for clinical trials and observational studies published between 2000 and 2021 in countries with developed economies. METHODS OF STUDY SELECTION Abstracts (n=4,275) and full-text studies (n=599) were identified and reviewed by two independent reviewers. Data on transfused red blood cells were included from studies reporting means and SDs, medians with interquartile ranges, or individual patient data. The primary outcome was the weighted mean number of units of red blood cells transfused per patient. Between-study heterogeneity was assessed with an I2 statistic. Secondary analyses included red blood cell usage by placenta accreta subtype. TABULATION, INTEGRATION, AND RESULTS Of the 599 full-text studies identified, 20 met criteria for inclusion in the systematic review, comprising 1,091 cases of placenta accreta spectrum. The number of units of red blood cells transfused was inconsistently described across studies, with five studies (25.0%) reporting means, 11 (55.0%) reporting medians, and four (20.0%) reporting individual patient data. The weighted mean number of units transfused was 5.19 (95% CI 4.12-6.26) per patient. Heterogeneity was high across studies (I2=91%). In a sensitivity analysis of five studies reporting mean data, the mean number of units transfused was 6.61 (95% CI 4.73-8.48; n=220 patients). Further quantification of units transfused by placenta accreta subtype was limited due to methodologic inconsistencies between studies and small cohort sizes. CONCLUSION Based on the upper limit of the CI in our main analysis and the high study heterogeneity, we recommend that a minimum of 6 units of red blood cells be available before delivery for patients with placenta accreta spectrum. These findings may inform future guidelines for predelivery blood ordering and transfusion support. SYSTEMATIC REVIEW REGISTRATION PROSPERO, CRD42021240993.
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2.
Race/Ethnicity as a Risk Factor in the Development of Postpartum Hemorrhage: A Thorough Systematic Review of Disparity in the Relationship Between Pregnancy and the Rate of Postpartum Hemorrhage
Okunlola O, Raza S, Osasan S, Sethia S, Batool T, Bambhroliya Z, Sandrugu J, Lowe M, Hamid P
Cureus. 2022;14(6):e26460
Abstract
Postpartum hemorrhage (PPH) is a major cause of maternal death and morbidity worldwide. Throughout the years, there have not been many studies looking into the association of race and ethnicity with the occurrence of PPH. The goal of this study was to assess race and ethnicity as risk factors in the development of PPH in pregnant women. Following the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) standards, we conducted the analysis and conducted a literature search using Google Scholar and PubMed. After applying our inclusion and exclusion criteria, the search technique yielded a total of eight articles. The analysis included seven observational studies and one randomized controlled trial. The incidence of PPH was chosen as the major outcome measure. An evaluation of eight studies revealed that although Hispanics, Asians, Native Hawaiians, and other Pacific Islanders (NHOPI) have a higher chance of developing PPH caused by uterine atony, Caucasians had a greater rate of transfusion than the other groups. In addition, compared to Caucasians, African Americans or African descendants had a lower risk of atonic PPH but increased odds of atonic PPH requiring interventions. On the other hand, compared to non-native groups, Native Americans had increased odds of uterine atony. The results showed that, in contrast to other races/ethnicities, Caucasians had the lowest risk of PPH. Additionally, it was shown that African Americans or those descended from Africans had a higher chance of PPH but a lower risk of atonic PPH.
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3.
Pure red-cell aplasia secondary to pregnancy: Case report and review of the literature
Herrera-Quintana JF, Rojas-Figueroa AC, Aragón-Mendoza RL, Gallo-Roa R, Castillo-Zamora MF
Revista colombiana de obstetricia y ginecologia. 2020;71(4):365-373
Abstract
OBJECTIVE To report a case of pure red-cell aplasia secondary to pregnancy and to conduct a review of the literature regarding diagnosis and treatment, as well as maternal and perinatal prognosis. METHODS This is the case of a 24-year-old patient at 34 weeks of gestation, referred to a regional public referral hospital due to anemia. Bone marrow biopsy was performed, leading to the diagnosis of pregnancy-related pure red-cell aplasia. The patient received serial red blood cell transfusions. Delivery by Cesarean section at term resulted in a healthy newborn. Hemoglobin values remained stable during the postoperative period. A literature search was conducted in Medline via PubMed, LILACS, SciELO and ScienceDirect using the terms "pregnancy" and "pure red-cell aplasia". Case reports, case series and literature reviews in English and Spanish published between January 1999 and January 2020 that report pregnant women with pure red-cell aplasia were included. Information on diagnosis, treatment and maternal and perinatal prognosis was collected. Three of the authors selected the studies by title and abstract; A descriptive synthesis is provided. RESULTS Overall, 828 titles were identified; of these,818 were discarded after reviewing the inclusions criteria. Ten articles were included: six case reports, three case reports with literature review, and one case report in the poster modality, for a total number of 10 reported cases. Diagnosis was based on low hemoglobin levels and compromised erythroid cell line in bone marrow biopsy. Treatment consists of red blood cell transfusions, with good maternal and fetal prognosis. CONCLUSIONS Diagnosis of pure red-cell aplasia during pregnancy requires bone marrow biopsy. With transfusion support, maternal perinatal prognosis is good. Further studies are required to assess the safety and efficacy of steroid use in this pregnancy-related condition.
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4.
Intrauterine administration of autologous peripheral blood mononuclear cells in patients with recurrent implantation failure: A systematic review and meta-analysis
Maleki-Hajiagha A, Razavi M, Rezaeinejad M, Rouholamin S, Almasi-Hashiani A, Pirjani R, Sepidarkish M
Journal of reproductive immunology. 2019;131:50-56
Abstract
Intrauterine administration of autologous peripheral blood mononuclear cells (PBMC) has been proposed to improve implantation rates in women with recurrent implantation failure (RIF). The objective of this study was to evaluate whether intrauterine administration of PBMC improves clinical pregnancy and live birth in couples with RIF. Various databases were searched including Medline, Embase, Scopus, Web of Science and Cochrane Central Register of Controlled Trials up to April 2018. This review included all studies that compared intervention of PBMC in infertile women undergoing any form of assisted reproductive technology (ART). Two independent reviewers assessed eligibility; methodological quality; and extracted data. Meta-analysis using a random-effects model was performed to calculate the pooled estimates. Eight studies involving 886 patients were included. The probability of clinical pregnancy was significantly higher in women who received PBMC compared with control (RR: 1.92, 95% CI: 1.48-2.49; P < 0.001). No difference was observed in the studies that transmitted the embryo at blastocyst (RR: 2.44, 95% CI: 1.42-4.20; P = 0.001), or cleavage stage (RR: 2.01, 95% CI: 1.36-2.96; P < 0.001). There was no difference between studies that transmitted the embryo in fresh (RR: 2.14, 95% CI: 1.38-3.32; P < 0.001), or frozen condition (RR: 1.79, 95% CI: 1.32-2.43; P < 0.001). The probability of live birth was significantly higher in women who received PBMC compared with control (RR: 1.93, 95% CI: 1.35-2.76; P < 0.001). Administration of PBMC, irrespective of embryo stage and cycle type, increases clinical pregnancy and live birth in patients experienced RIF. However, these overall estimates should be considered with caution due to the small number, quasi-experimental design and poor quality of most included studies.
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5.
Patient blood management (PBM) in pregnancy and childbirth: literature review and expert opinion
Surbek D, Vial Y, Girard T, Breymann C, Bencaiova GA, Baud D, Hornung R, Taleghani BM, Hosli I
Archives of gynecology and obstetrics. 2019
Abstract
PURPOSE Patient blood management [PBM] has been acknowledged and successfully introduced in a wide range of medical specialities, where blood transfusions are an important issue, including anaesthesiology, orthopaedic surgery, cardiac surgery, or traumatology. Although pregnancy and obstetrics have been recognized as a major field of potential haemorrhage and necessity of blood transfusions, there is still little awareness among obstetricians regarding the importance of PBM in this area. This review, therefore, summarizes the importance of PBM in obstetrics and the current evidence on this topic. METHOD We review the current literature and summarize the current evidence of PBM in pregnant women and postpartum with a focus on postpartum haemorrhage (PPH) using PubMed as literature source. The literature was reviewed and analysed and conclusions were made by the Swiss PBM in obstetrics working group of experts in a consensus meeting. RESULTS PBM comprises a series of measures to maintain an adequate haemoglobin level, improve haemostasis and reduce bleeding, aiming to improve patient outcomes. Despite the fact that the WHO has recommended PBM early 2010, the majority of hospitals are in need of guidelines to apply PBM in daily practice. PBM demonstrated a reduction in morbidity, mortality, and costs for patients undergoing surgery or medical interventions with a high bleeding potential. All pregnant women have a significant risk for PPH. Risk factors do exist; however, 60% of women who experience PPH do not have a pre-existing risk factor. Patient blood management in obstetrics must, therefore, not only be focused on women with identified risk factor for PPH, but on all pregnant women. Due to the risk of PPH, which is inherent to every pregnancy, PBM is of particular importance in obstetrics. Although so far, there is no clear guideline how to implement PBM in obstetrics, there are some simple, effective measures to reduce anaemia and the necessity of transfusions in women giving birth and thereby improving clinical outcome and avoiding complications. CONCLUSION PBM in obstetrics is based on three main pillars: diagnostic and/or therapeutic interventions during pregnancy, during delivery and in the postpartum phase. These three main pillars should be kept in mind by all professionals taking care of pregnant women, including obstetricians, general practitioners, midwifes, and anaesthesiologists, to improve pregnancy outcome and optimize resources.
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6.
Blood adiponectin concentration at birth in small for gestational age neonates: A meta-analysis
Goto E
Diabetes & metabolic syndrome. 2019;13(1):183-188
Abstract
AIMS: Small for gestational age (SGA) is associated with increased rates of neonatal mortality and morbidity. Adiponectin secreted from adipose tissue is implicated in the etiology of death and illness during infancy. SGA is also a likely risk factor for the development of metabolic and clinical complications in adulthood. The present study was performed to determine whether SGA neonates and healthy controls show differences in blood adiponectin concentration at birth. METHODS Databases were searched to identify English-language studies providing the numbers of SGA neonates, the numbers of healthy controls, and the means and standard deviations (SDs) of blood adiponectin concentrations at birth in both groups. Study quality was assessed using the Newcastle-Ottawa Scale (NOS). A meta-analysis was performed to summarize the standardized mean differences (SMDs) in blood adiponectin concentration between SGA neonates and healthy controls. RESULTS The results summarized from five good quality (i.e., NOS score≥5) studies involving 253 neonates showed that blood adiponectin concentration was significantly lower in SGA neonates than in healthy controls (P=0.016), and the effect was moderate (i.e., SMD=0.4-0.7). CONCLUSIONS Synthetic evidence indicated that blood adiponectin concentration at birth is lower in SGA neonates than in healthy controls.
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7.
Efficacy of intrauterine administration of autologous peripheral blood mononuclear cells on the pregnancy outcomes in patients with recurrent implantation failure: A systematic review and meta-analysis
Pourmoghadam Z, Abdolmohammadi-Vahid S, Pashazadeh F, Aghebati-Maleki L, Ansari F, Yousefi M
Journal of reproductive immunology. 2019;137:103077
Abstract
One in every nine couples suffers from implantation defects and pregnancy failures. In spite of many contributions that ART has given to infertility treatment, there are many reports of the failure of ART. Therefore, scientists suggested many complementary therapies for use besides ART to improve the quality of infertility treatments. Intrauterine PBMC-therapy is one of these complementary therapies that were used before IVF. Studies that examined PBMC treatment in women with at least three IVF/ET failure were included in this review. These studies involved RCT and quasi-experimental (non-randomized experimental) studies. A three-step search strategy was used for published and unpublished clinical trials written in English and Persian. No time limitation was set for studies. Study selection according to the inclusion criteria and methodological quality assessment and data extraction were done by two independent reviewers, which result in five studies being included (two RCTs and three quasi-experimental studies). Finally, all of these article extracted data were pooled in a statistical meta-analysis. Findings demonstrated that implantation, pregnancy and live birth rate were statistically increased and the miscarriage rate was significantly decreased in the PBMC-treated group than that non-treated group. In conclusion, based on the evidence, PBMCs can be an effective therapeutic approach in women with at least three IVF/ET failure and lacking initial inflammation that is essential for implantation.
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8.
Packed red cells versus whole blood transfusion for severe paediatric anaemia, pregnancy-related anaemia and obstetric bleeding: an analysis of clinical practice guidelines from sub-Saharan Africa and evidence underpinning recommendations
Kohli N, Bhaumik S, Jagadesh S, Sales RK, Bates I
Tropical Medicine & International Health : Tm & Ih. 2018;24((1):):11-22.
Abstract
OBJECTIVE Blood component transfusion is increasingly promoted in sub-Saharan Africa (SSA), but is resource-intensive so whole blood is often used. We examined SSA recommendations about whole blood and packed red cell transfusions for pregnancy-related bleeding or anaemia, and paediatric anaemia, and evaluated the evidence underpinning these recommendations. METHOD Relevant SSA guidelines were identified using five electronic databases, websites for SSA Ministries of Health, blood transfusion services and WHO. To facilitate comparisons, indications for transfusing packed red cells or whole blood within these guidelines and reasons given for these recommendations were recorded on a pre-designed matrix. The AGREE II tool was used to appraise guidelines that gave a reason for recommending either packed red cells or whole blood. We systematically searched MEDLINE, CINAHL, Global Health, Cochrane library and NHSBT Transfusion Evidence Library, using PRISMA guidelines, for clinical studies comparing whole blood with packed red cells or combined blood components in obstetric bleeding or anaemia, or paediatric anaemia. Characteristics and findings of included studies were extracted in a standardised format and narratively summarised. RESULTS 32 English language guidelines from 15 SSA countries mentioned packed red cell or whole blood use for our conditions of interest. Only seven guidelines justified their recommendation for using packed red cells or whole blood. No recommendations or justifications had supporting citations to research evidence. 33 full-text papers, from 11,234 citations, were reviewed but only one study met our inclusion criteria. This was a single-centre study in post-partum haemorrhage. CONCLUSION Evidence comparing whole blood and packed red cell transfusion for common paediatric and maternal indications is virtually absent in SSA. Therefore, it is unclear whether policies promoting red cells over whole blood transfusion are clinically appropriate. Building a relevant evidence base will help develop effective policies promoting the most appropriate use of blood in African settings. This article is protected by copyright. All rights reserved.
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9.
Efficacy and safety of blood transfusion in obstetric patients: systematic review of the literature
Modolo C, Agarwal A, Piva MFL, Botan AG, Camargo SEA, Gawish N, Modolo NSP, El Dib R
Ginekologia Polska. 2017;88((8)):446-452.
Abstract
OBJECTIVES To evaluate the efficacy of blood transfusion compared to no intervention in obstetric patients. MATERIAL AND METHODS A systematic review was performed with Cochrane Database of Clinical Trials, PubMed, EMBASE and LILACS databases searched as of September, 2016. Two authors independently selected relevant clinical trials, assessed their methodological quality and extracted data, using the GRADE approach. RESULTS Five studies within a total of 6,297 met the inclusion criteria, with women generally aged 20-40 years. Three included studies allocated women to receive blood transfusion or no intervention. Two other studies allocated women with either restricted or full blood supplies. The major issue regarding risk of bias was the extent of concealment of randomization and blinding. There was no statistically significant difference between blood transfusion versus no transfusion or restricted blood supply on mortality (relative risk 0.82 [95% confidential interval 0.32 to 2.09], p = 0.68; two studies; I2 = not applicable). CONCLUSIONS Very low-quality evidence suggests no significant difference between blood transfusion and no intervention in obstetric patients, underlining the need for more robust clinical trials evaluating this area.
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10.
The evidence (or lack of) concerning packed cells vs whole blood in low and middle income countries (LMIC)
Kohli N, Bhaumik S, Jagadesh S, Sales R, Bates I
Vox Sanguinis. 2017;112((Suppl. 1)):60.. 4b-s25-03.
