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Wool GD, Carll T. Viscoelastic testing: Critical appraisal of new methodologies and current literature. Int J Lab Hematol 2023; 45:643-658. [PMID: 37559473 DOI: 10.1111/ijlh.14144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 07/25/2023] [Indexed: 08/11/2023]
Abstract
United States Food and Drug Administration (FDA)-approved viscoelastic testing (VET) methodologies have significantly changed in the last 10 years, with the availability of cartridge-based VET. Some of these cartridge-based methodologies use harmonic resonance-based clot detection. While VET has always allowed for the evaluation of real-time clot formation, cartridge-based VET provides increased ease of use as well as greater portability and robustness of results in out-of-laboratory environments. Here we review the use of VET in a variety of clinical contexts, including cardiac surgery, trauma, liver transplant, obstetrics, and hypercoagulable states such as COVID-19. As of now, high quality randomized trial evidence for new generation VET (TEG 6s, HemoSonics Quantra, ROTEM sigma) is limited. Nevertheless, the use of VET-guided transfusion algorithms appears to result in reduced blood usage without worsening of patient outcomes. Future work comparing the new generation VET instruments and continuing to validate clinically important cut-offs will help move the field of point-of-care coagulation monitoring forward and increase the quality of transfusion management in bleeding patients.
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Affiliation(s)
- Geoffrey D Wool
- Department of Pathology, University of Chicago, Chicago, Illinois, USA
| | - Timothy Carll
- Department of Pathology, University of Chicago, Chicago, Illinois, USA
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2
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Lord MG, Calderon JA, Ahmadzia HK, Pacheco LD. Emerging technology for early detection and management of postpartum hemorrhage to prevent morbidity. Am J Obstet Gynecol MFM 2023; 5:100742. [PMID: 36075527 DOI: 10.1016/j.ajogmf.2022.100742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 08/28/2022] [Accepted: 09/01/2022] [Indexed: 10/14/2022]
Abstract
Despite advances in hemorrhage detection and management, postpartum hemorrhage remains the single leading cause of maternal death worldwide. Within the United States, hemorrhage is the leading cause of maternal death on the day of delivery and within the first week after delivery. Blood transfusion after hemorrhage represents a large proportion of severe maternal morbidity during and after delivery. Blood loss during delivery has historically been assessed visually by inspecting soiled pads, linens, and laparotomy sponges. These methods underestimate the volume of blood loss by as much as 40%, becoming increasingly inaccurate as blood loss increases. Young, healthy obstetrical patients compensate for blood loss via peripheral vasoconstriction, maintaining heart rate and blood pressure in a normal range until over 1 L of blood has been lost. A significant decrease in blood pressure along with marked tachycardia (>120 bpm) may not be seen until 30% to 40% of blood volume has been lost, or 2.0 to 2.6 L in a healthy term pregnant patient, after which the patient may rapidly decompensate. In resource-poor settings especially, the narrow window between the emergence of significant vital sign abnormalities and clinical decompensation may prove catastrophic. Once hemorrhage is detected, decisions regarding blood product transfusion are routinely made on the basis of inaccurate estimates of blood loss, placing patients at risk of underresuscitation (increasing the risk of hemorrhagic shock and end-organ damage) or overresuscitation (increasing the risk of transfusion reaction, fluid overload, and alloimmunization). We will review novel technologies that have emerged to assist both in the early and accurate detection of postpartum hemorrhage and in decisions regarding blood product transfusion.
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Affiliation(s)
- Megan G Lord
- Division of Maternal-Fetal Medicine, Women & Infants Hospital of Rhode Island, Alpert Medical School of Brown University, Providence, RI (Dr Lord).
| | - Joaquin A Calderon
- Division of Maternal-Fetal Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC (Drs Calderon and Ahmadzia)
| | - Homa K Ahmadzia
- Division of Maternal-Fetal Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC (Drs Calderon and Ahmadzia)
| | - Luis D Pacheco
- Divisions of Maternal-Fetal Medicine and Surgical Critical Care, University of Texas Medical Branch, Galveston, TX (Dr Pacheco)
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3
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Yurashevich M, Rosser M, Small M, Grotegut C, Kota N, Toffaletti J, Allen T. Evaluating the Association Between Fibrinogen and Rotational Thromboelastometry and the Progression to Severe Obstetric Hemorrhage. Clin Appl Thromb Hemost 2023; 29:10760296231175089. [PMID: 37186763 DOI: 10.1177/10760296231175089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
AIM This study aims to investigate the ability of fibrinogen and rotational thromboelastometry (ROTEM) parameters measured at obstetric hemorrhage protocol initiation to predict severe hemorrhage. METHODS In this retrospective study we included patients whose hemorrhage was managed with an obstetric massive transfusion protocol. Fibrinogen and ROTEM parameters EXTEM clotting time (CT), clot formation time (CFT), alpha angle, A10, A20, lysis index 30 min after CT (LI30), FIBTEM A10, A20, were measured at initiation of the protocol with transfusion based on a predefined algorithm. Patients were grouped into either severe or nonsevere hemorrhage based on: peripartum fall in hemoglobin ≥4 g/dL, transfusion of ≥4 units of blood product, invasive procedures for hemorrhage control, intensive care unit admission, or death. RESULTS Of the 155 patients included, 108 (70%) progressed to severe hemorrhage. Fibrinogen, EXTEM alpha angle, A10, A20, FIBTEM A10, A20 were significantly lower in the severe hemorrhage group while the CFT was significantly prolonged in the severe hemorrhage group. In univariate analysis, predicted progression to severe hemorrhage yielded areas under the receiver operating characteristic curve (95% confidence interval [CI]) of: fibrinogen: 0.683 (0.591-0.776), CFT: 0.671 (0.553, 0.789), EXTEM alpha angle: 0.690 (0.577-0.803), A10: 0.693 (0.570-0.815), A20: 0.678 (0.563-0.793), FIBTEM A10: 0.726 (0.605-0.847), and A20: 0.709 (0.594-0.824). In a multivariable model, fibrinogen was independently associated with severe hemorrhage (odds ratio [95% CI] = 1.037 [1.009-1.066]) for every 50 mg/dL decrease in fibrinogen drawn at obstetric hemorrhage massive transfusion protocol initiation. CONCLUSION Both fibrinogen and ROTEM parameters measured at the initiation of an obstetric hemorrhage protocol are useful parameters for predicting severe hemorrhage.
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Affiliation(s)
- Mary Yurashevich
- Department of Anesthesiology, Duke University School of Medicine, Durham, NC, USA
| | - Morgan Rosser
- Department of Anesthesiology, Duke University School of Medicine, Durham, NC, USA
| | - Maria Small
- Department of Obstetrics and Gynecology, Duke University School of Medicine, Durham, NC, USA
| | - Chad Grotegut
- Department of Obstetrics and Gynecology, Duke University School of Medicine, Durham, NC, USA
| | - Nancy Kota
- Department of Anesthesiology, Duke University School of Medicine, Durham, NC, USA
| | - John Toffaletti
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA
| | - Terrence Allen
- Department of Anesthesiology, Duke University School of Medicine, Durham, NC, USA
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4
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Othman M, Pradhan A. Laboratory Testing of Hemostasis in Pregnancy: A Brief Overview. Methods Mol Biol 2023; 2663:111-125. [PMID: 37204707 DOI: 10.1007/978-1-0716-3175-1_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Normal pregnancy is associated with significant physiological changes in the coagulation and fibrinolytic systems with an inclination toward a hypercoagulable state. This includes an increase in plasma levels of most clotting factors, a decrease in endogenous anticoagulants, and inhibition of fibrinolysis. Although these changes are critical in maintaining placental function and reducing postpartum hemorrhage, they may contribute to an increased risk of thromboembolism, particularly toward the end of pregnancy and during puerperium. Hemostasis parameters and the non-pregnant population reference ranges cannot be used in the assessment of bleeding or thrombotic complication risk during pregnancy, and pregnancy-specific information and reference ranges are not always available to support the interpretation of laboratory tests. This review aims to summarize the use of relevant hemostasis tests to promote evidence-based interpretation of laboratory test results as well as discuss challenges associated with testing during pregnancy.
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Affiliation(s)
- Maha Othman
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada.
- School of Baccalaureate Nursing, St. Lawrence College, Kingston, ON, Canada.
- Department of Clinical Pathology, School of Medicine, Mansoura University, Mansoura, Egypt.
| | - Anushka Pradhan
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
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5
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Bunch CM, Chang E, Moore EE, Moore HB, Kwaan HC, Miller JB, Al-Fadhl MD, Thomas AV, Zackariya N, Patel SS, Zackariya S, Haidar S, Patel B, McCurdy MT, Thomas SG, Zimmer D, Fulkerson D, Kim PY, Walsh MR, Hake D, Kedar A, Aboukhaled M, Walsh MM. SHock-INduced Endotheliopathy (SHINE): A mechanistic justification for viscoelastography-guided resuscitation of traumatic and non-traumatic shock. Front Physiol 2023; 14:1094845. [PMID: 36923287 PMCID: PMC10009294 DOI: 10.3389/fphys.2023.1094845] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/07/2023] [Indexed: 03/03/2023] Open
Abstract
Irrespective of the reason for hypoperfusion, hypocoagulable and/or hyperfibrinolytic hemostatic aberrancies afflict up to one-quarter of critically ill patients in shock. Intensivists and traumatologists have embraced the concept of SHock-INduced Endotheliopathy (SHINE) as a foundational derangement in progressive shock wherein sympatho-adrenal activation may cause systemic endothelial injury. The pro-thrombotic endothelium lends to micro-thrombosis, enacting a cycle of worsening perfusion and increasing catecholamines, endothelial injury, de-endothelialization, and multiple organ failure. The hypocoagulable/hyperfibrinolytic hemostatic phenotype is thought to be driven by endothelial release of anti-thrombogenic mediators to the bloodstream and perivascular sympathetic nerve release of tissue plasminogen activator directly into the microvasculature. In the shock state, this hemostatic phenotype may be a counterbalancing, yet maladaptive, attempt to restore blood flow against a systemically pro-thrombotic endothelium and increased blood viscosity. We therefore review endothelial physiology with emphasis on glycocalyx function, unique biomarkers, and coagulofibrinolytic mediators, setting the stage for understanding the pathophysiology and hemostatic phenotypes of SHINE in various etiologies of shock. We propose that the hyperfibrinolytic phenotype is exemplified in progressive shock whether related to trauma-induced coagulopathy, sepsis-induced coagulopathy, or post-cardiac arrest syndrome-associated coagulopathy. Regardless of the initial insult, SHINE appears to be a catecholamine-driven entity which early in the disease course may manifest as hyper- or hypocoagulopathic and hyper- or hypofibrinolytic hemostatic imbalance. Moreover, these hemostatic derangements may rapidly evolve along the thrombohemorrhagic spectrum depending on the etiology, timing, and methods of resuscitation. Given the intricate hemochemical makeup and changes during these shock states, macroscopic whole blood tests of coagulative kinetics and clot strength serve as clinically useful and simple means for hemostasis phenotyping. We suggest that viscoelastic hemostatic assays such as thromboelastography (TEG) and rotational thromboelastometry (ROTEM) are currently the most applicable clinical tools for assaying global hemostatic function-including fibrinolysis-to enable dynamic resuscitation with blood products and hemostatic adjuncts for those patients with thrombotic and/or hemorrhagic complications in shock states.
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Affiliation(s)
- Connor M Bunch
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, MI, United States.,Department of Internal Medicine, Henry Ford Hospital, Detroit, MI, United States
| | - Eric Chang
- Department of Medical Education, Indiana University School of Medicine, Notre Dame Campus, South Bend, IN, United States
| | - Ernest E Moore
- Department of Surgery, Ernest E. Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, CO, United States
| | - Hunter B Moore
- Department of Surgery, Ernest E. Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, CO, United States.,Department of Transplant Surgery, Denver Health and University of Colorado Health Sciences Center, Denver, CO, United States
| | - Hau C Kwaan
- Division of Hematology and Oncology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Joseph B Miller
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, MI, United States.,Department of Internal Medicine, Henry Ford Hospital, Detroit, MI, United States
| | - Mahmoud D Al-Fadhl
- Department of Medical Education, Indiana University School of Medicine, Notre Dame Campus, South Bend, IN, United States
| | - Anthony V Thomas
- Department of Medical Education, Indiana University School of Medicine, Notre Dame Campus, South Bend, IN, United States
| | - Nuha Zackariya
- Department of Medical Education, Indiana University School of Medicine, Notre Dame Campus, South Bend, IN, United States
| | - Shivani S Patel
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, MI, United States
| | - Sufyan Zackariya
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, MI, United States
| | - Saadeddine Haidar
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, MI, United States
| | - Bhavesh Patel
- Division of Critical Care, Department of Medicine, Mayo Clinic Arizona, Phoenix, AZ, United States
| | - Michael T McCurdy
- Division of Pulmonary and Critical Care, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Scott G Thomas
- Department of Trauma Surgery, Memorial Leighton Trauma Center, South Bend, IN, United States
| | - Donald Zimmer
- Department of Trauma Surgery, Memorial Leighton Trauma Center, South Bend, IN, United States
| | - Daniel Fulkerson
- Department of Trauma Surgery, Memorial Leighton Trauma Center, South Bend, IN, United States
| | - Paul Y Kim
- Department of Medicine, McMaster University, Hamilton, ON, Canada.,Thrombosis and Atherosclerosis Research Institute, Hamilton, ON, Canada
| | | | - Daniel Hake
- Departments of Emergency Medicine and Internal Medicine, Saint Joseph Regional Medical Center, Mishawaka, IN, United States
| | - Archana Kedar
- Departments of Emergency Medicine and Internal Medicine, Saint Joseph Regional Medical Center, Mishawaka, IN, United States
| | - Michael Aboukhaled
- Departments of Emergency Medicine and Internal Medicine, Saint Joseph Regional Medical Center, Mishawaka, IN, United States
| | - Mark M Walsh
- Department of Medical Education, Indiana University School of Medicine, Notre Dame Campus, South Bend, IN, United States.,Departments of Emergency Medicine and Internal Medicine, Saint Joseph Regional Medical Center, Mishawaka, IN, United States
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6
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Bunch CM, Berquist M, Ansari A, McCoy ML, Langford JH, Brenner TJ, Aboukhaled M, Thomas SJ, Peck E, Patel S, Cancel E, Al-Fadhl MD, Zackariya N, Thomas AV, Aversa JG, Greene RB, Seder CW, Speybroeck J, Miller JB, Kwaan HC, Walsh MM. The Choice between Plasma-Based Common Coagulation Tests and Cell-Based Viscoelastic Tests in Monitoring Hemostatic Competence: Not an either-or Proposition. Semin Thromb Hemost 2022; 48:769-784. [PMID: 36174601 DOI: 10.1055/s-0042-1756302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
There has been a significant interest in the last decade in the use of viscoelastic tests (VETs) to determine the hemostatic competence of bleeding patients. Previously, common coagulation tests (CCTs) such as the prothrombin time (PT) and partial thromboplastin time (PTT) were used to assist in the guidance of blood component and hemostatic adjunctive therapy for these patients. However, the experience of decades of VET use in liver failure with transplantation, cardiac surgery, and trauma has now spread to obstetrical hemorrhage and congenital and acquired coagulopathies. Since CCTs measure only 5 to 10% of the lifespan of a clot, these assays have been found to be of limited use for acute surgical and medical conditions, whereby rapid results are required. However, there are medical indications for the PT/PTT that cannot be supplanted by VETs. Therefore, the choice of whether to use a CCT or a VET to guide blood component therapy or hemostatic adjunctive therapy may often require consideration of both methodologies. In this review, we provide examples of the relative indications for CCTs and VETs in monitoring hemostatic competence of bleeding patients.
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Affiliation(s)
- Connor M Bunch
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, Michigan
| | - Margaret Berquist
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Aida Ansari
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Max L McCoy
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Jack H Langford
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Toby J Brenner
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Michael Aboukhaled
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Samuel J Thomas
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Ethan Peck
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Shivani Patel
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Emily Cancel
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana
| | - Mahmoud D Al-Fadhl
- Indiana University School of Medicine, Notre Dame Campus, South Bend, Indiana
| | - Nuha Zackariya
- Indiana University School of Medicine, Notre Dame Campus, South Bend, Indiana
| | - Anthony V Thomas
- Indiana University School of Medicine, Notre Dame Campus, South Bend, Indiana
| | - John G Aversa
- Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Ryan B Greene
- Department of Interventional Radiology, St. Joseph Regional Medical Center, Mishawaka, Indiana
| | - Christopher W Seder
- Department of Cardiovascular and Thoracic Surgery, Rush University Medical Center, Chicago, Illinois
| | - Jacob Speybroeck
- Department of Orthopedic Surgery, Case Western Medical Center, Cleveland, Ohio
| | - Joseph B Miller
- Department of Emergency Medicine, Henry Ford Hospital, Detroit, Michigan
| | - Hau C Kwaan
- Division of Hematology and Oncology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Mark M Walsh
- Department of Emergency Medicine, Saint Joseph Regional Medical Center, Mishawaka, Indiana.,Indiana University School of Medicine, Notre Dame Campus, South Bend, Indiana
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7
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Johnsen JM, MacKinnon HJ. JTH in Clinic - Obstetric bleeding: VWD and other inherited bleeding disorders. J Thromb Haemost 2022; 20:1568-1575. [PMID: 35621921 DOI: 10.1111/jth.15770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 05/25/2022] [Indexed: 01/19/2023]
Abstract
Individuals with inherited bleeding disorders (IBDs) have higher bleeding risk during pregnancy, childbirth, and the postpartum period. Clinical management requires recognition of the IBD as high risk for postpartum hemorrhage and a personalized multidisciplinary approach that includes the patient in decision making. When the fetus is known or at risk to inherit a bleeding disorder, fetal and neonatal bleeding risk also need to be considered. In pregnant IBD patients, it is common for providers to need to make decisions in the absence of high level of certainty evidence. We here present the case of a pregnant von Willebrand disease patient that reached multiple decision points where there is currently clinical ambiguity due to a lack of high level of certainty evidence. For each stage of her care, from diagnosis to the postpartum period, we discuss current literature and describe our approach. This is followed by a brief overview of considerations in other IBDs and pregnancy.
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Affiliation(s)
- Jill M Johnsen
- Bloodworks Research Institute, Seattle, WA, USA
- Department of Medicine, University of Washington, Seattle, Washington, USA
- Washington Center for Bleeding Disorders, Seattle, Washington, USA
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8
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Erez O, Othman M, Rabinovich A, Leron E, Gotsch F, Thachil J. DIC in Pregnancy - Pathophysiology, Clinical Characteristics, Diagnostic Scores, and Treatments. J Blood Med 2022; 13:21-44. [PMID: 35023983 PMCID: PMC8747805 DOI: 10.2147/jbm.s273047] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 09/15/2021] [Indexed: 01/04/2023] Open
Abstract
Obstetrical hemorrhage and especially DIC (disseminated intravascular coagulation) is a leading cause for maternal mortality across the globe, often secondary to underlying maternal and/or fetal complications including placental abruption, amniotic fluid embolism, HELLP syndrome (hemolysis, elevated liver enzymes and low platelets), retained stillbirth and acute fatty liver of pregnancy. Various obstetrical disorders can present with DIC as a complication; thus, increased awareness is key to diagnosing the condition. DIC patients can present to clinicians who may not be experienced in a variety of aspects of thrombosis and hemostasis. Hence, DIC diagnosis is often only entertained when the patient already developed uncontrollable bleeding or multi-organ failure, all of which represent unsalvageable scenarios. Beyond the clinical presentations, the main issue with DIC diagnosis is in relation to coagulation test abnormalities. It is widely believed that in DIC, patients will have prolonged prothrombin time (PT) and partial thromboplastin time (PTT), thrombocytopenia, low fibrinogen, and raised D-dimers. Diagnosis of DIC can be elusive during pregnancy and requires vigilance and knowledge of the physiologic changes during pregnancy. It can be facilitated by using a pregnancy specific DIC score including three components: 1) fibrinogen concentrations; 2) the PT difference - relating to the difference in PT result between the patient's plasma and the laboratory control; and 3) platelet count. At a cutoff of ≥26 points, the pregnancy specific DIC score has 88% sensitivity, 96% specificity, a positive likelihood ratio (LR) of 22, and a negative LR of 0.125. Management of DIC during pregnancy requires a prompt attention to the underlying condition leading to this complication, including the delivery of the patient, and correction of the hemostatic problem that can be guided by point of care testing adjusted for pregnancy.
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Affiliation(s)
- Offer Erez
- Maternity Department “D”, Division of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Faculty of Health Sciences Ben Gurion University of the Negev, Beer Sheva, Israel
- Department of Obstetrics and Gynecology, Hutzel Women’s Hospital, Wayne State University, Detroit, MI, USA
| | - Maha Othman
- Department of Biomedical and Molecular Sciences, School of Medicine, Queen’s University, Kingston, ON, Canada
| | - Anat Rabinovich
- Thrombosis and Hemostasis Unit, Hematology Institute, Soroka University Medical Center and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Elad Leron
- Division of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Faculty of Health Sciences Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Francesca Gotsch
- Department of Obstetrics and Gynecology, Azienda Ospedaliera Universitaria Integrata, AOUI Verona, University of Verona, Verona, Italy
| | - Jecko Thachil
- Department of Haematology, Manchester Royal Infirmary, Manchester, UK
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9
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Baird SM, Martin S, Kennedy MBB. Goals for Collaborative Management of Obstetric Hemorrhage. Obstet Gynecol Clin North Am 2021; 48:151-71. [PMID: 33573784 DOI: 10.1016/j.ogc.2020.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hemorrhage remains a leading cause of preventable maternal morbidity and mortality worldwide and in the United States. Postpartum hemorrhage is the number one cause of severe morbidity during hospitalization for birth, despite hospital, state, and national initiatives. In addition, studies show that more than 90% of maternal deaths related to obstetric hemorrhage are preventable. This article reviews relevant physiologic changes of pregnancy that may have an impact on hemorrhage management and describes collaborative approaches for management of hemorrhage in this unique population.
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10
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Merrill J, Sultan P, Sharawi N. Advances in anesthetic and obstetric management of patients with placenta accreta spectrum. Curr Opin Anaesthesiol 2021; 34:260-8. [PMID: 33935172 DOI: 10.1097/ACO.0000000000000985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE OF REVIEW The incidence of placenta accreta spectrum is increasing and it is a leading cause of peripartum hysterectomy and massive postpartum hemorrhage. The purpose of the present article is to provide a contemporary overview of placenta accreta spectrum pertinent to the obstetric anesthesiologist. RECENT FINDINGS Recent changes in the terminology used to report invasive placentation were proposed to clarify diagnostic criteria and guidelines for use in clinical practice. Reduced morbidity is associated with scheduled preterm delivery in a center of excellence using a multidisciplinary team approach. Neuraxial anesthesia as a primary technique is increasingly being used despite the known risk of major bleeding. The use of viscoelastic testing and endovascular interventions may aid hemostatic resuscitation and improve outcomes. SUMMARY Accurate diagnosis and early antenatal planning among team members are essential. Obstetric anesthesiologists should be prepared to manage a massive hemorrhage, transfusion, and associated coagulopathy. Increasingly, viscoelastic tests are being used to assess coagulation status and the ability to interpret these results is required to guide the transfusion regimen. Balloon occlusion of the abdominal aorta has been proposed as an intervention that could improve outcomes in women with placenta accreta spectrum, but high-quality safety and efficacy data are lacking.
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11
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Abstract
Viscoelastic assays (VEAs) that include thromboelastography and rotational thromboelastometry add value to the investigation of coagulopathies and goal-directed management of bleeding by providing a complete picture of clot formation, strength, and lysis in whole blood that includes the contribution of platelets, fibrinogen, and coagulation factors. Conventional coagulation assays have several limitations, such as their lack of correlation with bleeding and hypercoagulability; their inability to reflect the contribution of platelets, factor XIII, and plasmin during clot formation and lysis; and their slow turnaround times. VEA-guided transfusion algorithms may reduce allogeneic blood exposure during and after cardiac surgery and in the emergency management of trauma-induced coagulopathy and hemorrhage. However, the popularity of VEAs for other indications is driven largely by extrapolation of evidence from cardiac surgery, by the drawbacks of conventional coagulation assays, and by institution-specific preferences. Robust diagnostic studies validating and standardizing diagnostic cutoffs for VEA parameters and randomized trials comparing VEA-guided algorithms with standard care on clinical outcomes are urgently needed. Lack of such studies represents the biggest barrier to defining the role and impact of VEA in clinical care.
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Affiliation(s)
- Rita Selby
- Department of Laboratory Medicine and Pathobiology and Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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12
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O'Keefe D, Lim HY, Tham J, Ho P, Hui L. Assessing maternal clotting function with novel global coagulation assays: A prospective pilot study. Int J Lab Hematol 2020; 43:458-467. [PMID: 33174330 DOI: 10.1111/ijlh.13389] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/06/2020] [Accepted: 10/22/2020] [Indexed: 02/01/2023]
Abstract
INTRODUCTION Women are at higher risk of venous thromboembolism (VTE) during pregnancy and the puerperium. Global coagulation assays (GCAs), including thromboelastography (TEG), thrombin generation using the calibrated automated thrombogram (CAT) and fibrin generation using the overall haemostatic potential assay (OHP), provide a more comprehensive assessment of the coagulation process than conventional coagulation assays. We aimed to evaluate the ability of these GCAs to analyse the coagulability among pregnant women of varying VTE risk profile. METHODS Women undergoing term elective caesarean delivery provided a single predelivery blood sample for conventional and novel coagulation testing (TEG, CAT and OHP). Data from 47 healthy nonpregnant women aged 18-45 years were used as controls. RESULTS Sixty women with term singleton pregnancies were included. Samples from pregnant women were hypercoagulable on most GCA parameters compared to nonpregnant controls, demonstrating increased maximum amplitude (clot strength) (71.5 vs 60.6 mm, P < .001) on whole blood TEG and increased endogenous thrombin potential (1895.22 vs 1399.33 nmol/L·min, P < .001) and overall coagulation potential (fibrin generation) (57.58 vs 36.21 units, P < .001) on platelet-poor plasma. Pregnant women with booking BMI ≥ 30 kg/m2 had significantly higher maximum amplitude compared to pregnant women of normal BMI (18.5-25 kg/m2 ) (73.2 vs 66.1 mm, P < .001). CONCLUSIONS Global coagulation assays reliably detect the physiological hypercoagulability of pregnancy. Thromboelastography in particular appears to correlate with obesity in the pregnant population. GCAs may be potential adjuncts to risk factor-based criteria to guide VTE thromboprophylaxis during pregnancy and the puerperium.
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Affiliation(s)
- David O'Keefe
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Vic., Australia.,Department of Obstetrics and Gynaecology, Northern Health, Epping, Vic., Australia
| | - Hui Yin Lim
- Department of Haematology, Northern Health, Epping, Vic., Australia.,Northern Pathology Victoria, Northern Health, Epping, Vic., Australia
| | - Johnathan Tham
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Vic., Australia.,Department of Obstetrics and Gynaecology, Northern Health, Epping, Vic., Australia
| | - Prahlad Ho
- Department of Haematology, Northern Health, Epping, Vic., Australia.,Northern Pathology Victoria, Northern Health, Epping, Vic., Australia
| | - Lisa Hui
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Vic., Australia.,Department of Obstetrics and Gynaecology, Northern Health, Epping, Vic., Australia.,Department of Perinatal Medicine, Mercy Hospital for Women, Heidelberg, Vic., Australia
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Amgalan A, Allen T, Othman M, Ahmadzia HK. Systematic review of viscoelastic testing (TEG/ROTEM) in obstetrics and recommendations from the women's SSC of the ISTH. J Thromb Haemost 2020; 18:1813-1838. [PMID: 32356929 DOI: 10.1111/jth.14882] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/13/2020] [Accepted: 04/24/2020] [Indexed: 12/13/2022]
Abstract
Thromboelastography (TEG) and rotational thromboelastometry (ROTEM) are point-of-care viscoelastic devices that use whole blood samples to assess coagulation and fibrinolysis. These devices have been studied extensively in cardiac surgery, but there is limited robust evidence supporting its use in obstetrics. The hesitancy toward its routine use in obstetrics may be due to the current lack of randomized controlled trials and large observational studies. The study aims to systematically review studies that investigated TEG/ROTEM use in pregnancy or peripartum, and to provide recommendations for future studies to fill current research gaps. We performed a systematic review of studies on viscoelastic testing in obstetrics. Included studies were original research, used TEG or ROTEM during pregnancy or peripartum, and published in English. Ninety-three studies, spanning 31 years from 1989 to 2020 and with a total of 32,817 participants, were included. Sixty-two (66.7%) of the studies used TEG and 31 (33.3%) used ROTEM. To date, there are a total of two randomized controlled trials on TEG/ROTEM use in obstetrics. ROTEM may be used to guide transfusion therapy for postpartum hemorrhage. TEG and ROTEM can detect the hypercoagulable changes associated with pregnancy. Variability between study protocols and results suggests the need for future large prospective high-quality studies with standardized protocols to investigate the utility of TEG/ROTEM in assessing risk for thrombosis and hemorrhage as well as in guiding prophylaxis and treatment in obstetric patients. This review identifies the gaps and provides concrete recommendations for future studies to fill those gaps.
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Affiliation(s)
| | - Terrence Allen
- Department of Anesthesiology, Duke University Hospital, Durham, NC, USA
| | - Maha Othman
- Department of Biomedical and Molecular Sciences, School of Medicine, Queen's University, Kingston, ON, Canada
- School of Baccalaureate Nursing, St. Lawrence College, Kingston, ON, Canada
| | - Homa K Ahmadzia
- Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
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Amgalan A, Othman M. TEG in pregnancy: Current challenges and future potential applications. Thromb Res 2020; 191:140-141. [PMID: 32414520 DOI: 10.1016/j.thromres.2020.03.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/21/2020] [Accepted: 03/23/2020] [Indexed: 12/29/2022]
Affiliation(s)
| | - Maha Othman
- Department of Biomedical and Molecular Sciences, School of Medicine, Queen's University, Kingston, Canada; School of Baccalaureate Nursing, St. Lawrence College, Kingston, Canada.
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Sadov RI, Panova IA, Nazarov SB, Kuzmenko GN, Klycheva MM. [Changes in the indicators of thromboelastography and platelet function in pregnant women with various forms of hypertensive disorders in the third trimester of pregnancy.]. Klin Lab Diagn 2020; 65:281-288. [PMID: 32298543 DOI: 10.18821/0869-2084-2020-65-5-281-288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 02/20/2020] [Indexed: 12/17/2022]
Abstract
The aim of this research is the study of haemostasis of pregnant women suffering from various forms of hypertensive disorders in their III trimester of pregnancy. 165 women at 26-41 weeks of pregnancy were examined: 22 women had moderate preeclampsia, 31 had severe preeclampsia, 45 women suffered from chronic hypertension, 20 women have developed preeclampsia on the background of chronic hypertension and 47 women had no hypertensive disorders (control group). The hemostasis system has been assessed using the results of the following investigations: thromboelastography, induced platelet aggregation with ADP and adrenaline at a dosage of 1.25 and 2.5 μg/ml respectively and collagen at a dosage of 20 mg/ml, platelet ATP secretion and the average concentration of platelet components. Thromboelastography has been performed using TEG® 5000 thromboelastograph (Haemoscope Corporation, USA). The study of platelet aggregation and platelet ATP secretion has been performed at automatic aggregometer CHRONO-LOG® Model 700 (USA). The mean platelet component concentration has been measured using SIEMENS ADVIA 2120i automated hematology analyzer (Siemens Healthcare Diagnostics Inc., USA). Thromboelastogram analysis showed a decrease in the plasma hemostasis activity in all groups of women with hypertensive disorders. The functional activity of platelets of women with moderate preeclampsia and chronic arterial hypertension did not change in comparison with to the control group. The disorder of dense platelet granules degranulation and decrease in their aggregation ability have been detected in a cohort with severe preeclampsia. The decrease in adrenaline induced platelet aggregation has been noted in the group of women suffering from preeclampsia on the background of chronic arterial hypertension. Thromboelastography analysis (R, K, angle α, TMA, Cl, LY30) may be useful for the differential diagnosis of severe preeclampsia and chronic arterial hypertension. The results of the study led to the conclusion that it is advisable to use low doses of ADP and adrenaline as inducers of platelet aggregation, considering their granulocyticity and the ability to secrete ATP.
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Affiliation(s)
- R I Sadov
- Ivanovo Research Institute of Maternity and Childhood named after V.N. Gorodkov, 153045, Ivanovo, Russian Federation
| | - I A Panova
- Ivanovo Research Institute of Maternity and Childhood named after V.N. Gorodkov, 153045, Ivanovo, Russian Federation
| | - S B Nazarov
- Ivanovo Research Institute of Maternity and Childhood named after V.N. Gorodkov, 153045, Ivanovo, Russian Federation
| | - G N Kuzmenko
- Ivanovo Research Institute of Maternity and Childhood named after V.N. Gorodkov, 153045, Ivanovo, Russian Federation
| | - M M Klycheva
- Ivanovo Research Institute of Maternity and Childhood named after V.N. Gorodkov, 153045, Ivanovo, Russian Federation
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Yang J, Yang H, Tang A, Liu X, Sun X, Ma J, Zhao J, Ming L. Trimester-specific reference intervals for kaolin-activated thromboelastography (TEG®) in healthy Chinese pregnant women. Thromb Res 2019; 184:81-85. [DOI: 10.1016/j.thromres.2019.09.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/06/2019] [Accepted: 09/28/2019] [Indexed: 12/29/2022]
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