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Ramanujam V, DiMaria S, Varma V. Thromboelastography in the Perioperative Period: A Literature Review. Cureus 2023; 15:e39407. [PMID: 37362492 PMCID: PMC10287184 DOI: 10.7759/cureus.39407] [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] [Accepted: 05/23/2023] [Indexed: 06/28/2023] Open
Abstract
Assessing coagulation status is essential for prompt intervention to reduce morbidity and mortality related to bleeding and thrombotic complications during the perioperative period. Traditional coagulation tests such as platelet count, activated partial thromboplastin time (aPTT), prothrombin time (PT), international normalized ratio (INR), and activated clotting time (ACT) provide only static evaluation. These tests are not designed for assessment of dynamically changing coagulation conditions during the perioperative time. However, viscoelastic coagulation testing such as thromboelastography (TEG) produces a rapid numerical and graphical representation that helps to detect and direct targeted hemostatic therapy. Searching the literature through PubMed, Medline, Ovid, CINAHL, and ClinicalTrials.gov we retrieved 210 studies, which represent the use of TEG in the perioperative period. The included studies were categorized under various settings such as trauma, obstetrics, orthopedics, intensive care unit (ICU), cardiovascular, transplant, and miscellaneous scenarios. TEG showed promising results in trauma surgeries in predicting mortality, hypercoagulability, and bleeding even when it was compared to conventional methods. TEG was also useful in monitoring anticoagulant therapy in orthopedic and obstetric surgeries; however, its role in predicting thrombotic events, hypercoagulability, or complications was questionable. In ICU patients, it showed promising results, especially in the prediction or improvement of sepsis, coagulopathy, thrombotic events, ICU duration, hospital stay, and ventilator duration. TEG parameters effectively predicted hypercoagulation in transplant surgeries. Regarding cardiovascular surgeries, they were effective in the prediction of the need for blood products, coagulopathy, thrombotic events, and monitoring anticoagulation therapy. More randomized clinical trials comparing TEG parameters with standardized tools are needed to produce robust results to standardize its use in different perioperative settings.
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Affiliation(s)
- Vendhan Ramanujam
- Department of Anesthesiology, Rhode Island Hospital/The Warren Alpert Medical School of Brown University, Providence, USA
| | - Stephen DiMaria
- Department of Anesthesiology, Rhode Island Hospital/The Warren Alpert Medical School of Brown University, Providence, USA
| | - Vivek Varma
- Department of Anesthesiology, Rhode Island Hospital/The Warren Alpert Medical School of Brown University, Providence, USA
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2
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Yoshikawa Y, Maeda M, Ohno S, Takahashi K, Sawashita Y, Hirahata T, Iba Y, Kawaharada N, Edanaga M, Yamakage M. Validity and Utility of Early Parameters in TEG6s Platelet Mapping to Assess the Coagulation Status During Cardiovascular Surgery With Cardiopulmonary Bypass. Cureus 2023; 15:e38044. [PMID: 37228566 PMCID: PMC10208008 DOI: 10.7759/cureus.38044] [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] [Accepted: 04/24/2023] [Indexed: 05/27/2023] Open
Abstract
Background The aim of this retrospective observational study was to explore the early predictive parameters for maximum amplitudein the kaolin with heparinase (HKH) assay (MAHKH) of TEG6s Platelet Mapping in cardiovascular surgery including cardiopulmonary bypass (CPB) period. The relationship between each parameter of the assay and laboratory data was also assessed. Methods We included the patients who underwent TEG6s Platelet Mapping during cardiovascular surgery under CPB between November 2021 and May 2022. The correlation between MAHKH and the early parameters was assessed. The association between each parameter of Platelet Mapping and a combination of fibrinogen concentration > 150 mg/dL and platelet count > 100,000µL was also evaluated by the receiver operating characteristic (ROC) curve. Results In 23 patients who underwent TEG6s Platelet Mapping during the study period, 62 HKH assay data including 59 pairs of data (HKH assay and laboratory data) were analyzed. K and angle, but not R, were significantly correlated with MAHKH (r [95% CI]: -0.90 [-0.94, -0.83], p < 0.0001 for K, and 0.87 [0.79, 0.92], p < 0.0001 for angle). Furthermore, ROC curves suggested that these parameters predicted a combination of fibrinogen concentration > 150 mg/dL and platelet count > 100,000/µL with high accuracy. Similar results were confirmed in the heparinized blood samples obtained during CPB. Conclusion These findings suggest that not only MAKHK but also K and angle, which are early parameters in the HKH assay, provide clinically significant information that will facilitate rapid decision-making regarding coagulation strategies during cardiovascular surgery including the CPB period.
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Affiliation(s)
- Yusuke Yoshikawa
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Makishi Maeda
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Sho Ohno
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Kanako Takahashi
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Yasuaki Sawashita
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Tomoki Hirahata
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Yutaka Iba
- Department of Cardiovascular Surgery, Sapporo Medical University, Sapporo, JPN
| | | | - Mitsutaka Edanaga
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
| | - Michiaki Yamakage
- Department of Anaesthesiology, Sapporo Medical University, Sapporo, JPN
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Chen JH, Zhou H, Zhang Q, Wang H, Hidig SM, Chen XY, Feng S. Diagnostic value of mean platelet volume combined with thromboelastography for coagulation state after total knee arthroplasty. Clin Hemorheol Microcirc 2023; 84:321-331. [PMID: 37212090 DOI: 10.3233/ch-231802] [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: 05/23/2023]
Abstract
BACKGROUND The main objective of this study was to predict the status of blood and the occurrence of lower limb deep vein thrombosis (DVT) after total knee arthroplasty(TKA) by means of mean platelet volume (MPV) combined with thromboelastography (TEG). METHODS We collected 180 patients who underwent unilateral total knee arthroplasty between May 2015 and March 2022, and the patients were divided into DVT group and control group according to whole-leg ultrasonography on the seventh postoperative day. Blood count and TEG were performed on the day before surgery, the first day after surgery and the seventh day respectively. Multifactorial analysis was used to investigate whether the relevant parameters were independent predictors of DVT after TKA. RESULTS MPV has the strongest correlation with the maximum amplitude (MA), followed by alpha-angle; MPV and alpha-angle on the first postoperative day are independent predictors of DVT. MPV in patients with thrombosis tends to rise and then fall in the perioperative period. The optimal threshold for MPV to predict thrombosis is 10.85 fL and the area under the ROC curve is 0.694, The area under the ROC curve increases to 0.815 using MPV combined with alpha-angle. In addition, MA, α-angle, composite coagulation index (CI) and MPV were all statistically higher in the DVT group than in the control group (p < 0.001). CONCLUSION MPV is a predictor of DVT after TKA. It can reflect the hypercoagulable state of blood after surgery; Combination of MPV and alpha-angle on the first day after surgery in patients with TKA improves predictive power of DVT.
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Affiliation(s)
- Jia-Hao Chen
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Hang Zhou
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Qiang Zhang
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Hu Wang
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Sakarie Mustafe Hidig
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Xiang-Yang Chen
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Shuo Feng
- Department of Orthopedic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
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Vlot EA, Hackeng CM, Aper SJ, Sonker U, Heijmen RH, van Dongen EP, Noordzij PG. Does Intraoperative Fibrinogen Affect Blood Loss or Transfusion Practice After Aortic Arch Surgery: A Prematurely Ended Randomized Trial. Clin Appl Thromb Hemost 2022; 28:10760296221144042. [PMID: 36476152 PMCID: PMC9742581 DOI: 10.1177/10760296221144042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cardiovascular surgery is often complicated by significant bleeding due to perioperative coagulopathy. The effectiveness of treatment with fibrinogen concentrate to reduce the perioperative blood transfusion rate after thoracic aortic replacement surgery in prior studies has shown conflicting results. Therefore, we conducted a double-blind randomized controlled trial to investigate if a single dose of intraoperative fibrinogen administration reduced blood loss and allogeneic transfusion rate after elective surgery for thoracic arch aneurysm with deep hypothermic circulatory arrest. Twenty patients were randomized to fibrinogen concentrate (N = 10) or placebo (N = 10). The recruitment of study patients was prematurely ended due to a low inclusion rate. Perioperative transfusion, 5-minute bleeding mass after study medication and postoperative blood loss were not different between the groups with fibrinogen concentrate or placebo. Due to small volumes of postoperative blood loss and premature study termination, a beneficial effect of fibrinogen concentrate on the number of blood transfusions could not be established. However, treatment with fibrinogen efficiently restored fibrinogen levels and clot strength to preoperative values with a more effective preserved postoperative thrombin generation capacity. This result might serve as a pilot for further multicenter studies to assess the prospective significance of automated and standardized thrombin generation as a routine assay for monitoring perioperative coagulopathy and its impact on short- and long-term operative results.
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Affiliation(s)
- Eline A. Vlot
- Department of Anesthesia, Intensive Care and Pain Medicine, St. Antonius Hospital, Nieuwegein, Netherlands,Eline A. Vlot, Department of Anesthesia, Intensive Care and Pain Medicine, St. Antonius Hospital, Koekoekslaan 1, 3435 CM Nieuwegein, Netherlands.
| | - Christian M. Hackeng
- Department of Clinical Chemistry, St. Antonius Hospital, Nieuwegein, Netherlands
| | - Stijn J.A. Aper
- Department of Clinical Chemistry, St. Antonius Hospital, Nieuwegein, Netherlands
| | - Uday Sonker
- Department of Cardiac Surgery, St. Antonius Hospital, Nieuwegein, Netherlands
| | - Robin H. Heijmen
- Department of Cardiac Surgery, St. Antonius Hospital, Nieuwegein, Netherlands
| | - Eric P.A. van Dongen
- Department of Anesthesia, Intensive Care and Pain Medicine, St. Antonius Hospital, Nieuwegein, Netherlands
| | - Peter G. Noordzij
- Department of Anesthesia, Intensive Care and Pain Medicine, St. Antonius Hospital, Nieuwegein, Netherlands
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Kristobak BM, McCarthy ML, Keneally RJ, Amberman KD, Ellis HJ, Call RC. Citrate does not change viscoelastic haemostatic assays after cardiopulmonary bypass. Ann Card Anaesth 2022; 25:453-459. [PMID: 36254910 PMCID: PMC9732968 DOI: 10.4103/aca.aca_34_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 06/10/2021] [Accepted: 07/25/2021] [Indexed: 06/16/2023] Open
Abstract
CONTEXT Viscoelastic hemostatic assays (VHA) are commonly used to identify specific cellular and humoral causes for bleeding in cardiac surgery patients. Cardiopulmonary bypass (CPB) alterations to coagulation are observable on VHA. Citrated VHA can approximate fresh whole blood VHA when kaolin is used as the activator in healthy volunteers. Some have suggested that noncitrated blood is more optimal than citrated blood for point-of-care analysis in some populations. AIMS To determine if storage of blood samples in citrate after CPB alters kaolin activated VHA results. SETTINGS AND DESIGN This was a prospective observational cohort study at a single tertiary care teaching hospital. METHODS AND MATERIAL Blood samples were subjected to VHA immediately after collection and compared to samples drawn at the same time and stored in citrate for 30, 90, and 150 min prior to kaolin activated VHA both before and after CPB. STATISTICAL ANALYSIS USED VHA results were compared using paired T-tests and Bland-Altman analysis. RESULTS Maximum clot strength and time to clot initiation were not considerably different before or after CPB using paired T-tests or Bland-Altman Analysis. CONCLUSIONS Citrated samples appear to be a clinically reliable substitute for fresh samples for maximum clot strength and time to VHA clot initiation after CPB. Concerns about the role of citrate in altering the validity of the VHA samples in the cardiac surgery population seem unfounded.
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Affiliation(s)
- Benjamin M. Kristobak
- Department of Anesthesiology, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Margaret L. McCarthy
- Department of Anesthesiology, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Ryan J. Keneally
- Department of Anesthesiology, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Keith D. Amberman
- Department of Anesthesiology, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Harvey J. Ellis
- Department of Anesthesiology, Walter Reed National Military Medical Center, Bethesda, MD, USA
| | - Robert C. Call
- Department of Anesthesiology, Walter Reed National Military Medical Center, Bethesda, MD, USA
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Wallner B, Schenk B, Paal P, Falk M, Strapazzon G, Martini WZ, Brugger H, Fries D. Hypothermia Induced Impairment of Platelets: Assessment With Multiplate vs. ROTEM—An In Vitro Study. Front Physiol 2022; 13:852182. [PMID: 35422712 PMCID: PMC9002345 DOI: 10.3389/fphys.2022.852182] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/09/2022] [Indexed: 11/20/2022] Open
Abstract
Introduction: This experimental in vitro study aimed to identify and characterize hypothermia-associated coagulopathy and to compare changes in mild to severe hypothermia with the quantitative measurement of rotational thromboelastometry (ROTEM) and multiple-electrode aggregometry (MULTIPLATE). Methods: Whole blood samples from 18 healthy volunteers were analyzed at the target temperatures of 37, 32, 24, 18, and 13.7°C with ROTEM (ExTEM, InTEM and FibTEM) and MULTIPLATE using the arachidonic acid 0.5 mM (ASPI), thrombin receptor-activating peptide-6 32 µM (TRAP) and adenosine diphosphate 6.4 µM (ADP) tests at the corresponding incubating temperatures for coagulation assessment. Results: Compared to baseline (37°C) values ROTEM measurements of clotting time (CT) was prolonged by 98% (at 18°C), clot formation time (CFT) was prolonged by 205% and the alpha angle dropped to 76% at 13.7°C (p < 0.001). At 24.0°C CT was prolonged by 56% and CFT by 53%. Maximum clot firmness was only slightly reduced by ≤2% at 13.7°C. Platelet function measured by MULTIPLATE was reduced with decreasing temperature (p < 0.001): AUC at 13.7°C −96% (ADP), −92% (ASPI) and −91% (TRAP). Conclusion: Hypothermia impairs coagulation by prolonging coagulation clotting time and by decreasing the velocity of clot formation in ROTEM measurements. MULTIPLATE testing confirms a linear decrease in platelet function with decreasing temperatures, but ROTEM fails to adequately detect hypothermia induced impairment of platelets.
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Affiliation(s)
- Bernd Wallner
- Department of Anaesthesiology and General Intensive Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
- Department of General and Surgical Intensive Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
- *Correspondence: Bernd Wallner,
| | | | - Peter Paal
- Department of Anaesthesiology and Intensive Care Medicine, St. John of God Hospital, Paracelsus Medical University, Salzburg, Austria
| | - Markus Falk
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Giacomo Strapazzon
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Wenjun Z. Martini
- US Army Institute of Surgical Research, San Antonio, TX, United States
| | - Hermann Brugger
- Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Dietmar Fries
- Department of General and Surgical Intensive Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
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7
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Garg P. Abstract No.: ABS1337: Comparison study of routine coagulation tests and thromboelastography for detection of hypocoagulable state in patients undergoing cardiac surgery on cardiopulmonary bypass. Indian J Anaesth 2022. [PMCID: PMC9116804 DOI: 10.4103/0019-5049.340715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background & Aim: Methods: Results: Conclusion:
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Efficacy of sonorheometry point of the care device in determining low fibrinogen levels in pregnant blood: an invitro dilution and reconstitution study. J Clin Monit Comput 2021; 36:1423-1431. [PMID: 34859304 DOI: 10.1007/s10877-021-00782-1] [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: 12/08/2020] [Accepted: 11/20/2021] [Indexed: 10/19/2022]
Abstract
Quantra® Hemostasis Analyzer is a Point of the care device that uses ultrasound technology to assess clot formation. In this study, we establish how Quantra® system performs compared to conventional coagulation tests at low levels of fibrinogen in the blood obtained from pregnant women. 24 mL blood was obtained from each healthy parturient. Blood was analyzed for Quantra® variables (Q): Clot time (CT), Clot stiffness (CS), platelet contribution to CS (PCS), fibrinogen contribution to CS (FCS), and conventional coagulation (CL) tests: PT, aPTT, INR, Factor VIII and fibrinogen. 6 ml blood were centrifuged to obtain pregnant plasma. 30 mL of saline was added to 10 mL of blood to simulate crystalloid resuscitation (DB) and was evaluated for Q and CL. Fractions of pregnant plasma, or nonpregnant plasma (Blood Bank) was added to DB to obtain 15% and 30% clotting factor enriched samples. 4 ml of DB was added to 4 ml of original blood (1:1) to obtain the final sample (resus). Each of the samples were analyzed for Q and CL parameters. Regression analysis and Receiving Characteristics Curves were used to study the relationship between Quantra variables and CL tests. There were remarkably high linear correlations between Fibrinogen and CS (R = 0.93, P < 0.001), fibrinogen and FCS (R = 0.77, P < 0.001). An FCS value 2.45 (sensitivity of 79.2 and specificity of 97.3%), and CS value 10.85 hPa (sensitivity of 83% and specificity of 100%) predicted fibrinogen of 200 mg/dL. This study demonstrates a good correlation between Quantra® CS, FCS and serum fibrinogen.Clinical Trial Number: NCT04301193.
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9
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Abstract
Background: Fibrinogen is a substrate for blood clots formation. In cardiac surgery, a number of different mechanisms lead to a decrease in fibrinogen levels and consequent impaired haemostasis. Patients undergoing cardiac surgery are therefore frequently exposed to blood loss and allogeneic blood transfusion, which are risk factors associated with morbidity and mortality. Thus, particular efforts in fibrinogen management should be made to decrease bleeding and the need for blood transfusion. Therefore, fibrinogen remains an active focus of investigations from basic science to clinical practice. This review aims to summarise the latest evidence regarding the role of fibrinogen and current practices in fibrinogen management in adult cardiac surgery. Methods: The PubMed database was systematically searched for literature investigating the role and disorders of fibrinogen in cardiac surgery and diagnostic and therapeutic procedures related to fibrinogen deficiency aimed at reducing blood loss and transfusion requirements. Clinical trials and reviews from the last 10 years were included. Results: In total, 146 articles were analysed. Conclusion: The early diagnosis and treatment of fibrinogen deficiency is crucial in maintaining haemostasis in bleeding patients. Further studies are needed to better understand the association between fibrinogen levels, bleeding, and fibrinogen supplementation and their impacts on patient outcomes in different clinical settings.
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10
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Miles LF, Burt C, Arrowsmith J, McKie MA, Villar SS, Govender P, Shaylor R, Tan Z, De Silva R, Falter F. Optimal protamine dosing after cardiopulmonary bypass: The PRODOSE adaptive randomised controlled trial. PLoS Med 2021; 18:e1003658. [PMID: 34097705 PMCID: PMC8216535 DOI: 10.1371/journal.pmed.1003658] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 06/21/2021] [Accepted: 05/14/2021] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND The dose of protamine required following cardiopulmonary bypass (CPB) is often determined by the dose of heparin required pre-CPB, expressed as a fixed ratio. Dosing based on mathematical models of heparin clearance is postulated to improve protamine dosing precision and coagulation. We hypothesised that protamine dosing based on a 2-compartment model would improve thromboelastography (TEG) parameters and reduce the dose of protamine administered, relative to a fixed ratio. METHODS AND FINDINGS We undertook a 2-stage, adaptive randomised controlled trial, allocating 228 participants to receive protamine dosed according to a mathematical model of heparin clearance or a fixed ratio of 1 mg of protamine for every 100 IU of heparin required to establish anticoagulation pre-CPB. A planned, blinded interim analysis was undertaken after the recruitment of 50% of the study cohort. Following this, the randomisation ratio was adapted from 1:1 to 1:1.33 to increase recruitment to the superior arm while maintaining study power. At the conclusion of trial recruitment, we had randomised 121 patients to the intervention arm and 107 patients to the control arm. The primary endpoint was kaolin TEG r-time measured 3 minutes after protamine administration at the end of CPB. Secondary endpoints included ratio of kaolin TEG r-time pre-CPB to the same metric following protamine administration, requirement for allogeneic red cell transfusion, intercostal catheter drainage at 4 hours postoperatively, and the requirement for reoperation due to bleeding. The trial was listed on a clinical trial registry (ClinicalTrials.gov Identifier: NCT03532594). Participants were recruited between April 2018 and August 2019. Those in the intervention/model group had a shorter mean kaolin r-time (6.58 [SD 2.50] vs. 8.08 [SD 3.98] minutes; p = 0.0016) post-CPB. The post-protamine thromboelastogram of the model group was closer to pre-CPB parameters (median pre-CPB to post-protamine kaolin r-time ratio 0.96 [IQR 0.78-1.14] vs. 0.75 [IQR 0.57-0.99]; p < 0.001). We found no evidence of a difference in median mediastinal/pleural drainage at 4 hours postoperatively (140 [IQR 75-245] vs. 135 [IQR 94-222] mL; p = 0.85) or requirement (as a binary outcome) for packed red blood cell transfusion at 24 hours postoperatively (19 [15.8%] vs. 14 [13.1%] p = 0.69). Those in the model group had a lower median protamine dose (180 [IQR 160-210] vs. 280 [IQR 250-300] mg; p < 0.001). Important limitations of this study include an unblinded design and lack of generalisability to certain populations deliberately excluded from the study (specifically children, patients with a total body weight >120 kg, and patients requiring therapeutic hypothermia to <28°C). CONCLUSIONS Using a mathematical model to guide protamine dosing in patients following CPB improved TEG r-time and reduced the dose administered relative to a fixed ratio. No differences were detected in postoperative mediastinal/pleural drainage or red blood cell transfusion requirement in our cohort of low-risk patients. TRIAL REGISTRATION ClinicalTrials.gov Unique identifier NCT03532594.
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Affiliation(s)
- Lachlan F. Miles
- Department of Critical Care, The University of Melbourne, Melbourne, Australia
- Department of Anaesthesia, Austin Health, Melbourne, Australia
- * E-mail:
| | - Christiana Burt
- Department of Anaesthesia and Intensive Care, Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Joseph Arrowsmith
- Department of Anaesthesia and Intensive Care, Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Mikel A. McKie
- MRC Biostatistics Unit, School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Sofia S. Villar
- MRC Biostatistics Unit, School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Pooveshnie Govender
- Department of Anaesthesia and Intensive Care, Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Ruth Shaylor
- Department of Anaesthesia, Austin Health, Melbourne, Australia
| | - Zihui Tan
- Department of Anaesthesia and Intensive Care, Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Ravi De Silva
- Department of Surgery, Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
| | - Florian Falter
- Department of Anaesthesia and Intensive Care, Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom
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11
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Vlot EA, van Dongen EPA, Willemsen LM, Berg JMT, Hackeng CM, Loer SA, Noordzij PG. Association of Plasma Fibrinogen and Thromboelastography With Blood Loss in Complex Cardiac Surgery. Clin Appl Thromb Hemost 2021; 27:10760296211016541. [PMID: 34013768 PMCID: PMC8142233 DOI: 10.1177/10760296211016541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Postoperative coagulopathic bleeding is common in cardiac surgery and is
associated with increased morbidity and mortality. Ideally, real-time
information on in-vivo coagulation should be available. However, up to now it is
unclear which perioperative coagulation parameters can be used best to
accurately identify patients at increased risk of bleeding. The present study
analyzed the associations of perioperative fibrinogen concentrations and whole
blood viscoelastic tests with postoperative bleeding in 89 patients undergoing
combined cardiac surgery procedures. Postoperative bleeding was recorded until
24 hours after surgery. Regression analyses were performed to establish
associations between blood loss and coagulation parameters after cardiopulmonary
bypass including a prediction model with known confounding factors for bleeding.
Coagulation tests show large changes over the perioperative course with the
strongest coagulopathic deviations from baseline after cardiopulmonary bypass.
After adjustment for multiple confounders, viscoelastic clot strength instead of
fibrinogen concentration showed a similar performance for 24 hour blood loss and
a better performance for 6 hour blood loss. This makes intraoperative
viscoelastic testing a useful tool to strengthen early clinical decision-making
with the potential to reduce perioperative blood transfusions.
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Affiliation(s)
- Eline A Vlot
- Department of Anaesthesia, Intensive Care and Pain Medicine, St Antonius Hospital, Nieuwegein, The Netherlands
| | - Eric P A van Dongen
- Department of Anaesthesia, Intensive Care and Pain Medicine, St Antonius Hospital, Nieuwegein, The Netherlands
| | - Laura M Willemsen
- Department of Cardiology, St Antonius Hospital, Nieuwegein, The Netherlands
| | - Jur M Ten Berg
- Department of Cardiology, St Antonius Hospital, Nieuwegein, The Netherlands
| | - Christian M Hackeng
- Department of Clinical Chemistry, St Antonius Hospital, Nieuwegein, The Netherlands
| | - Stephan A Loer
- Department of Anaesthesia, Intensive Care and Pain Medicine, Amsterdam UMC, The Netherlands
| | - Peter G Noordzij
- Department of Anaesthesia, Intensive Care and Pain Medicine, St Antonius Hospital, Nieuwegein, The Netherlands
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12
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Thromboelastography and rotational thromboelastometry for the surgical intensivist: A narrative review. J Trauma Acute Care Surg 2020; 86:710-721. [PMID: 30633093 DOI: 10.1097/ta.0000000000002206] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Viscoelastic tests (VETs), specifically thromboelastography (TEG) and rotational thromboelastometry (ROTEM), are gaining popularity in the management of critically ill surgical patients with hemorrhage or thrombosis due to their comprehensive characterization of the coagulation process and point-of-care availability in comparison to conventional coagulation tests (CCTs). We review current evidence for VET use in patients in the surgical intensive care unit (SICU). METHODS We searched PUBMED, EMBASE and the Cochrane Library through May 30, 2018 for articles that evaluated the use of VETs in patient populations and clinical scenarios germane to the surgical intensivist. Individual articles were critically evaluated for relevance and appropriate methodology using a structured technique. Information on patient characteristics, timing and methods of CCTs/VETs, and outcomes was collected and summarized in narrative form. RESULTS Of 2,589 identified articles, 36 were included. Five (14%) were interventional studies and 31 (86%) were observational. Twenty-five (69%) evaluated TEG, 11 (31%) ROTEM and 18 (50%) CCTs. Investigated outcomes included quantitative blood loss (13 (36%)), blood product transfusion (9 (25%)), thromboembolic events (9 (25%)) and mortality (6 (17%)). We identified 12 clinical scenarios with sufficient available evidence, much of which was of limited quantity and poor methodological quality. Nonetheless, research supports the use of VETs for guiding early blood product administration in severe traumatic hemorrhage and for the prediction of abstract excess bleeding following routine cardiac surgery. In contrast, evidence suggests VET-based heparin dosing strategies for venous thromboembolism prophylaxis are not superior to standard dosing in SICU patients. CONCLUSION While VETs have the potential to impact the care of critically ill surgical patients in many ways, current evidence for their use is limited, mainly because of poor methodological quality of most available studies. Further high-quality research, including several ongoing randomized controlled trials, is needed to elucidate the role of TEG/ROTEM in the SICU population. LEVEL OF EVIDENCE Systematic review, level IV.
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Liang C, Yang Y, He Z, Ma S, Qu X, Luo Y, Shen C, Xu R. Comparison between thromboelastography and the conventional coagulation test in detecting effects of antiplatelet agents after endovascular treatments in acute ischemic stroke patients: A STROBE-compliant study. Medicine (Baltimore) 2020; 99:e19447. [PMID: 32150098 PMCID: PMC7478771 DOI: 10.1097/md.0000000000019447] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Antiplatelet agents have been administered to patients with acute ischemic stroke after endovascular therapy. This study was designed to provide initial data to compare thromboelastography (TEG) with the conventional coagulation test (CCT) to analyze the coagulation function of antiplatelet drugs in such patients.The present retrospective cohort study included 240 patients who received endovascular therapy from September 2012 to December 2017. The baseline and clinical characteristics of these patients were collected with respect to TEG (parameters: R, K, maximal amplitude (MA), and α angle) and CCT (parameters: PT, activated partial thromboplastin time (APTT), fibrinogen (FIB), international normalized ratio (INR), and platelet count (PLT)) on day 5 after aspirin and clopidogrel post-endovascular interventions. The correlation and agreement of these 2 detecting methods were analyzed. Additionally, the area under the receiver operating characteristic curve (AUROC) was used to analyze the effectiveness of these 2 methods in detecting unfavorable clinical outcomes, including symptomatic intracranial hemorrhage and early neurological deterioration.The 3 pairs of parameters (R and APTT, K and APTT, and α angle and FIB) were in agreement for identifying hypercoagulability, while R and APTT, K and APTT, K and PLT, and α angle and PLT were in agreement for identifying hypocoagulability. The AUROC of parameter R for detecting symptomatic intracranial hemorrhage was 0.817, while that of parameter FIB for predicting early neurological deterioration was 0.887.Parameter FIB derived from CCT might be advantageous for evaluating early neurological deterioration, while parameter R detected by TEG might be superior for evaluating symptomatic intracranial hemorrhage.
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Affiliation(s)
- Chunyang Liang
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
| | - Yang Yang
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
- Department of Neurosurgery, University Hospital of Zurich, CH-8091, Zurich, Switzerland
| | - Zijun He
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
| | - Shang Ma
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
| | - Xuenan Qu
- Laboratory Medicine, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
| | - Yongchun Luo
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
| | - Chunsen Shen
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
| | - Ruxiang Xu
- Affiliated Bayi Brain Hospital, The Seventh Medical Center of P.L.A. Army General Hospital, 100700, Beijing, China
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Haensig M, Kempfert J, Kempfert PM, Girdauskas E, Borger MA, Lehmann S. Thrombelastometry guided blood-component therapy after cardiac surgery: a randomized study. BMC Anesthesiol 2019; 19:201. [PMID: 31694568 PMCID: PMC6833285 DOI: 10.1186/s12871-019-0875-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 10/24/2019] [Indexed: 12/13/2022] Open
Abstract
Background Significant bleeding is a well known complication after cardiac surgical procedures and is associated with worse outcome. Thrombelastometry (ROTEM®) allows point-of-care testing of the coagulation status but only limited data is available yet. The aim was to evaluate the ROTEM®-guided blood component therapy in a randomized trial. Methods In case of significant postoperative bleeding (> 200 ml/h) following elective isolated or combined cardiac surgical procedures (including 14% re-do procedures and 4% requiring circulatory arrest) patients were randomized to either a 4-chamber ROTEM®-guided blood-component transfusion protocol or received treatment guided by an algorithm based on standard coagulation testing (control). One hundred four patients (mean age: 67.2 ± 10.4 years, mean log. EuroSCORE 7.0 ± 8.8%) met the inclusion criteria. Mean CPB-time was 112.1 ± 55.1 min., mean cross-clamp time 72.5 ± 39.9 min. Results Baseline demographics were comparable in both groups. Overall there was no significant difference in transfusion requirements regarding red blood cells, platelets, plasma, fibrinogen or pooled factors and the re-thoracotomy rate was comparable (ROTEM®: 29% vs. control: 25%). However, there was a trend towards less 24-h drainage loss visible in the ROTEM®-group (ROTEM®: 1599.1 ± 834.3 ml vs. control: 1867.4 ± 827.4 ml; p = 0.066). In the subgroup of patients with long CPB-times (> 115 min.; n = 55) known to exhibit an increased risk for diffuse coagulopathy ROTEM®-guided treatment resulted in a significantly lower 24-h drainage loss (ROTEM®: 1538.2 ± 806.4 ml vs. control: 2056.8 ± 974.5 ml; p = 0.032) and reduced 5-year mortality (ROTEM®: 0% vs. control: 15%; p = 0.03). Conclusion In case of postoperative bleeding following cardiac surgical procedures a treatment algorithm based on “point-of-care” 4-chamber ROTEM® seems to be at least as effective as standard therapy. In patients with long CPB-times ROTEM®-guided treatment may result in less bleeding, a marked reduction in costs and long-term mortality. Trial registration German Clinical Trials Register, TRN: DRKS00017367, date of registration: 05.06.2019, ‘retrospectively registered’.
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Affiliation(s)
- Martin Haensig
- Department of Vascular Surgery, Cardiovascular Center, University of Leipzig, Liebigstr 20, 04103, Leipzig, Germany.
| | - Joerg Kempfert
- Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
| | - Pia-Maria Kempfert
- Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany
| | - Evaldas Girdauskas
- Department of Cardiac and Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | | | - Sven Lehmann
- Clinic of Cardiac Surgery, Heart Center, University of Leipzig, Leipzig, Germany
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