1
|
Dionne TL, Ishak AM, Cochran LA. Point-of-care global coagulation assay parameters in normal dogs and dogs with primary immune-mediated hemolytic anemia. J Vet Emerg Crit Care (San Antonio) 2023; 33:81-90. [PMID: 36453474 DOI: 10.1111/vec.13262] [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: 09/09/2021] [Revised: 12/22/2021] [Accepted: 01/20/2022] [Indexed: 12/05/2022]
Abstract
OBJECTIVE To compare viscoelastic parameters between healthy control dogs and dogs with primary immune-mediated hemolytic anemia (pIMHA) using a new, point-of-care viscoelastic coagulation monitor (VCM).a DESIGN: Retrospective study from 2017 to 2021. SETTING Three regional private referral centers. ANIMALS Eighteen client-owned dogs with pIMHA and 33 healthy control dogs. pIMHA dogs were defined based on established criteria. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Medical records of dogs with pIMHA and VCM performed at diagnosis from 2017 to 2021 and apparently healthy control dogs voluntarily enrolled in the blood donor program from 2017 to 2018 were reviewed. For the healthy control dogs, consent was obtained to perform VCM in addition to traditional screening. Compared to healthy control dogs, dogs with pIMHA had mean VCM parameters consistent with hypercoagulability, demonstrated by lower mean (SD) clot formation time (108 s [30] vs 233 s [55]; P < 0.0001), higher mean alpha angle (62 degrees [6] vs 52 degrees [6]; P < 0.0001), higher mean maximum clot formation (49 VCM units [11] vs 32 VCM units [5]; P < 0.0001), higher mean amplitude at 10 minutes (40 VCM units [11] vs 19 VCM units [3]; P < 0.0001), and higher mean amplitude at 20 minutes (47 VCM units [11] vs 25 VCM units [4]; P < 0.0001). pIMHA dogs also had significantly higher median (interquartile range) lysis index at 30 minutes (100% [100-100] vs 98% [90-100]; P < 0.0001). When compared to 3 established normal canine reference intervals, dogs with pIMHA had a significantly higher proportion of VCM variables (48%-57%) consistent with hypercoagulability, and a significant percentage of pIMHA dogs (78%-89%) had VCM tracings consistent with hypercoagulability overall, irrespective of the interval utilized for interpretation. CONCLUSIONS This study demonstrates hypercoagulability in dogs with pIMHA when compared to healthy control dogs using VCM. Prospective evaluation is warranted to further characterize these findings as well as to evaluate their clinical impact.
Collapse
|
2
|
Steiner V, Schwendenwein I, Burgener IA, Pagitz M, Tichy A, Luckschander-Zeller N. Comparison of the effects of open-tube and evacuated tube-assisted sampling methods on thromboelastography variables for blood samples from healthy dogs. Am J Vet Res 2021; 83:239-244. [PMID: 34941566 DOI: 10.2460/ajvr.21.05.0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To compare the effects of open-tube blood sampling with previously investigated blood sampling methods via evacuated tube on thromboelastography variables for blood samples from dogs. ANIMALS 10 healthy Beagles from the research colony owned by the Clinic of Small Animal Internal Medicine, University Veterinary of Medicine, Vienna, were used. PROCEDURES In this prospective study, blood was sampled from each dog serially into citrate solution-containing tubes via 20-gauge needle. One evacuated tube was filled from a jugular vein via the evacuated tube port, and the second tube was opened and filled by catching blood flowing through the needle from a lateral saphenous vein. Venipuncture quality was scored with a previously described method. Thromboelastography was performed for each sample. RESULTS Inferential statistics used with the Wilcoxon signed rank test showed significant differences in reaction time (R) of 3.43 ± 0.84 minutes versus 4.53 ± 0.62 minutes (mean ± SD) between evacuated tube assisted and open-tube sampling, respectively. No other significant differences were identified. CLINICAL RELEVANCE The sampling methods compared have a small but significant effect on R in thromboelastographic analysis for blood samples from healthy dogs. Shear stress by vacuum sampling seems to accelerate coagulation in jugular blood samples harvested by evacuated tube, resulting in a shortened R. Results suggested that the open-tube method avoids shear stress induced activation of coagulation and is an appropriate sampling method for thromboelastography when used within a standardized protocol.
Collapse
Affiliation(s)
- Verena Steiner
- 1Department for Companion Animals and Horses, Clinic for Small Animal Internal Medicine, University of Veterinary Medicine, Vienna, Austria
| | - Ilse Schwendenwein
- 2Department for Pathobiology, Central Laboratory, University of Veterinary Medicine, Vienna, Austria
| | - Iwan Anton Burgener
- 1Department for Companion Animals and Horses, Clinic for Small Animal Internal Medicine, University of Veterinary Medicine, Vienna, Austria
| | - Maximilian Pagitz
- 1Department for Companion Animals and Horses, Clinic for Small Animal Internal Medicine, University of Veterinary Medicine, Vienna, Austria
| | - Alexander Tichy
- 3Platform for Bioinformatics and Biostatistics, University of Veterinary Medicine, Vienna, Austria
| | - Nicole Luckschander-Zeller
- 1Department for Companion Animals and Horses, Clinic for Small Animal Internal Medicine, University of Veterinary Medicine, Vienna, Austria
| |
Collapse
|
3
|
Kielb Basile JL, Lynch AM, Ruterbories L, Castaneda K, Griffith E, Ueda Y. Influence of long-stay jugular catheters on hemostatic variables in healthy dogs. J Vet Emerg Crit Care (San Antonio) 2021; 31:557-563. [PMID: 34216531 DOI: 10.1111/vec.13085] [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: 05/21/2020] [Revised: 09/20/2020] [Accepted: 10/03/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To compare hemostatic variables performed on blood samples obtained from indwelling jugular catheters or direct venipuncture over a 72-hour period. DESIGN Prospective experimental study. SETTING University research laboratory. ANIMALS Five healthy neutered male purpose-bred Beagle dogs. INTERVENTIONS Each dog was sedated to facilitate placement of a long-stay 20-Ga polyurethane IV catheter into the jugular vein. Blood samples were obtained from the preplaced catheters at 4 time points corresponding to 0, 24, 48, and 72 hours relative to placement. Blood samples were also obtained by direct venipuncture of a peripheral vein using a 21-Ga butterfly catheter and evacuated blood tubes at the same time points. Platelet count, platelet closure time, prothrombin time, activated partial thromboplastin time, fibrinogen, and kaolin-activated thromboelastography were performed on these paired samples at each time point. The patency of the indwelling catheters was maintained by flushing every 6 hours with heparinized saline. MEASUREMENTS AND MAIN RESULTS No significant differences were identified in any of the hemostatic variables obtained by either blood collection technique at any time point during the study (P > 0.05). There was also no significant day-to-day variation in any catheter-derived hemostatic variable obtained from individual dogs identified over the course of the study. CONCLUSIONS These data suggest that accurate hemostatic variables may be obtained using blood collected from indwelling jugular catheters, maintained with heparinized saline for at least 72 hours, in healthy dogs.
Collapse
Affiliation(s)
| | - Alex M Lynch
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Laura Ruterbories
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Kady Castaneda
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Emily Griffith
- Department of Statistics, North Carolina State University, Raleigh, North Carolina, USA
| | - Yu Ueda
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| |
Collapse
|
4
|
Jud Schefer R, Heimgartner L, Stirn M, Sigrist NE. Determination of reference intervals for single vial rotational thromboelastometry (ROTEM) parameters and correlation with plasmatic coagulation times in 49 clinically healthy dogs. Res Vet Sci 2020; 129:129-136. [PMID: 31982776 DOI: 10.1016/j.rvsc.2020.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 01/05/2023]
Abstract
The objectives of this prospective study were determination of reference intervals (RI) for rotational thromboelastometry (ROTEM) parameters in single use reagents and to evaluate correlations between plasmatic coagulation times and ROTEM parameters. Blood was sampled from a jugular vein in 49 client-owned healthy dogs and ex-tem S, in-tem S, fib-tem S and ap-tem S parameters, prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen, haematology, blood chemistry and venous blood gas analysis was performed. Determination of RI was performed using Excel add-in Reference Value Advisor and correlations between PT, aPTT and fibrinogen with selected ROTEM parameters were determined by Spearman correlation. Ex-tem S maximum clot firmness (MCF) RI are smaller compared to RI in people and liquid ex-tem in dogs while maximum lysis was comparable to those in people but smaller than previously reported in dogs. A strong correlation was found between fibrinogen measured by Clauss and fib-tem S and in-tem S MCF (r = 0.541, P < .001 and r = 0.610, P < .001, respectively). PT showed a significant but moderate correlation with ex-tem S CT (r = 0.340, P = .030), in-tem S CFT (r = 0.433, P = .003), fib-tem S CT (r = 0.426, P = .009) and ap-tem S CT (r = 0.354, P = .015) while aPTT was not significantly correlated with any of the evaluated parameters. In conclusion, this study provides single use reagent ROTEM parameter RIs that are different from RI determined with liquid reagents. Significant correlations between fibrinogen concentrations measured by Clauss and clot firmness of fib-tem S and in-tem S profiles and between PT and clotting times of all reagents were identified.
Collapse
Affiliation(s)
- Rahel Jud Schefer
- Division of Emergency and Critical Care Medicine, Department of Small Animals, Vetsuisse Faculty of the University of Zurich, Switzerland.
| | - Lara Heimgartner
- Division of Emergency and Critical Care Medicine, Department of Small Animals, Vetsuisse Faculty of the University of Zurich, Switzerland
| | - Martina Stirn
- Clinical laboratory, Department for Clinical Diagnostics and Services, Vetsuisse Faculty of the University of Zurich, Switzerland
| | - Nadja E Sigrist
- Division of Emergency and Critical Care Medicine, Department of Small Animals, Vetsuisse Faculty of the University of Zurich, Switzerland.
| |
Collapse
|
5
|
Shin D, Nam A, Song KH, Seo KW. Influence of needle gauge and venepuncture difficulty on thromboelastography in healthy cats. J Feline Med Surg 2019; 21:708-713. [PMID: 30179081 PMCID: PMC10814300 DOI: 10.1177/1098612x18796672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
OBJECTIVES The aim of this study was to evaluate the effect of two differently sized butterfly catheter needles and the effect of venepuncture difficulty on thromboelastography (TEG) results in healthy cats. METHODS Twenty-four healthy cats were included. Blood samples were collected from the jugular vein by syringe aspiration via direct venepuncture with 21 G and 22 G butterfly needles. The venepuncture difficulty score was classified into four categories. The first 1.5 ml blood drawn from each subject was discarded before collecting a sample for TEG analysis. TEG analyses were performed on citrated whole blood samples from 17 clinically healthy cats, using assays with kaolin as activators. Among the TEG parameters, reaction time (R), clot formation time (κ), alpha angle (α), maximum amplitude (MA) and global clot strength (G) were recorded from each tracing. RESULTS Seven cats were excluded from the study; results were obtained for the remaining 17 cats. There were no statistically significant differences between the use of two different needles for R (P = 0.72), κ (P = 0.74), α (P = 0.99), MA (P = 0.08) and G (P = 0.09). Samples with difficulty scores ⩾1 were not significantly different from samples with difficulty scores of 0 for R (P = 0.24), κ (P = 0.65), α (P = 0.65), MA (P = 0.72) and G (P = 0.77). CONCLUSIONS AND RELEVANCE The results of TEG in clinically healthy cats do not differ significantly when using two different gauge needles. There was no significant difference in the TEG results according to venepuncture difficulty scoring.
Collapse
Affiliation(s)
- Duree Shin
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Aryung Nam
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Kun Ho Song
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Kyoung Won Seo
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungnam National University, Daejeon, Republic of Korea
| |
Collapse
|
6
|
Smith RP, Koenigshof AM, Smith DJ, Strom PR, Nelson NC. Influence of immune-mediated hemolytic anemia on flow velocities in the portal vein and caudal vena cava measured by use of pulsed-wave Doppler ultrasonography in dogs. Am J Vet Res 2018; 79:518-524. [PMID: 29688778 DOI: 10.2460/ajvr.79.5.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To compare blood flow velocities of the portal vein (PV) and caudal vena cava (CVC) measured by use of pulsed-wave Doppler ultrasonography in clinically normal dogs and dogs with primary immune-mediated hemolytic anemia (IMHA). ANIMALS 11 client-owned dogs admitted to a veterinary teaching hospital for management of primary IMHA and 21 staff- or student-owned clinically normal dogs. PROCEDURES Flow velocities in the PV and CVC at the porta hepatis were evaluated in conscious unsedated dogs with concurrent ECG monitoring; evaluations were performed before dogs with IMHA received heparin or blood transfusions. Three measurements of peak velocity at end expiration were obtained for each vessel, and the mean was calculated. Results were compared between IMHA and control groups. RESULTS Mean ± SD blood flow velocity in the CVC differed between control (63.0 ± 18.6 cm/s) and IMHA (104 ± 36.9 cm/s) groups. Variance in dogs with IMHA was significantly greater than that for the clinically normal dogs. No significant difference in blood flow velocity in the PV was detected between IMHA and control dogs. CONCLUSIONS AND CLINICAL RELEVANCE Higher blood flow velocities were detected by use of pulsed-wave Doppler ultrasonography in the CVC of dogs with naturally occurring IMHA and may be used to predict anemia in patients suspected of having IMHA.
Collapse
|
7
|
Goggs R, Borrelli A, Brainard BM, Chan DL, de Laforcade A, Goy-Thollot I, Jandrey KE, Kristensen AT, Kutter A, Marschner CB, Rannou B, Sigrist N, Wagg C. Multicenter in vitro thromboelastography and thromboelastometry standardization. J Vet Emerg Crit Care (San Antonio) 2018; 28:201-212. [DOI: 10.1111/vec.12710] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/22/2017] [Accepted: 03/30/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Robert Goggs
- Department of Clinical Sciences, College of Veterinary Medicine; Cornell University; Ithaca NY
| | - Antonio Borrelli
- Department of Veterinary Science; University of Turin; Grugliasco Italy
| | | | - Daniel L. Chan
- Department of Clinical Sciences and Services; Royal Veterinary College; London UK
| | | | | | | | | | - Annette Kutter
- Vetsuisse Faculty; University of Zurich; Zurich Switzerland
| | - Clara B. Marschner
- Department of Veterinary Clinical and Animal Sciences; University of Copenhagen; Denmark
| | - Benoît Rannou
- VetAgro Sup; Campus Vétérinaire de Lyon; Marcy l′Étoile France
| | - Nadja Sigrist
- Vetsuisse Faculty; University of Zurich; Zurich Switzerland
| | | |
Collapse
|
8
|
Cuq B, Blois SL, Wood RD, Monteith G, Abrams-Ogg AC, Bédard C, Wood GA. Reproducibility, stability, and biological variability of thrombin generation using calibrated automated thrombography in healthy dogs. Vet Clin Pathol 2018; 47:218-226. [DOI: 10.1111/vcp.12602] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Benoît Cuq
- Department of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph ON Canada
| | - Shauna L. Blois
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON Canada
| | - R. Darren Wood
- Department of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph ON Canada
| | - Gabrielle Monteith
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON Canada
| | - Anthony C. Abrams-Ogg
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON Canada
| | - Christian Bédard
- Département de Pathologie et Microbiologie; Faculté de Médecine Vétérinaire; Université de Montréal; Montreal QC Canada
| | - Geoffrey A. Wood
- Department of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph ON Canada
| |
Collapse
|
9
|
Scruggs JL, Flatland B, McCormick KA, Reed A. Biological variation of thromboelastrography variables in 10 clinically healthy horses. J Vet Emerg Crit Care (San Antonio) 2015; 26:80-4. [PMID: 26479874 DOI: 10.1111/vec.12410] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 01/21/2014] [Accepted: 09/04/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To assess the utility of population-based reference intervals (PRIs) for interpreting thromboelastography (TEG) variables in horses using biological variation data. DESIGN Prospective cohort biologic variation study conducted over a 5-week period. SETTING Veterinary teaching hospital and research facility. ANIMALS Ten clinically healthy horses randomly selected from a veterinary school research and teaching herd. INTERVENTIONS Horse health was determined using physical examination, CBC, and biochemical and coagulation profiles prior to the start of the study. Subsequently, once weekly blood sampling for TEG testing was performed for 5 weeks. MEASUREMENTS AND MAIN RESULTS The 4 TEG variables reaction time (R), clot formation time (K), angle, and maximum amplitude (MA) were measured, and coefficient of variation representing within- and between-horse biological variation (CVi and CVg , respectively) and coefficient of variation representing analytical variation (CVa ) were calculated using a nested ANOVA after removing outlier data. The CVi , CVg , and CVa for R were 26.8%, 5.2%, and 5.9%; for K were 31.0%, 0.0%, and 5.9%; for angle were 9.4%, 6.2%, and 21.7%; and for MA were 3.4%, 4.1%, and 4.4%, respectively. Index of individuality (IOI) was then calculated for each variable using the formula {( CVi² + CVa²/CVg²)}¹/². IOI for R was 5.3, for angle was 3.8, and for MA was 1.4; IOI was not assessed for K. CONCLUSIONS PRIs are appropriate for TEG variables, R, angle, and MA when interpreting results from individual horses based on calculated IOI values equal to or greater than 1.4. PRIs are likely appropriate when interpreting K, but IOI could not be calculated for this variable.
Collapse
Affiliation(s)
- Jennifer L Scruggs
- Departments of Biomedical and Diagnostic Sciences, University of Tennessee, Knoxville, TN, 37996
| | - Bente Flatland
- Departments of Biomedical and Diagnostic Sciences, University of Tennessee, Knoxville, TN, 37996
| | - Karen A McCormick
- Large Animal Clinical Sciences, University of Tennessee, Knoxville, TN, 37996
| | - Ann Reed
- College of Veterinary Medicine and the Office of Information Technology, University of Tennessee, Knoxville, TN, 37996
| |
Collapse
|
10
|
Hanel RM, Chan DL, Conner B, Gauthier V, Holowaychuk M, Istvan S, Walker JM, Wood D, Goggs R, Wiinberg B. Systematic evaluation of evidence on veterinary viscoelastic testing Part 4: Definitions and data reporting. J Vet Emerg Crit Care (San Antonio) 2014; 24:47-56. [DOI: 10.1111/vec.12145] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 11/15/2013] [Indexed: 12/28/2022]
Affiliation(s)
- Rita M. Hanel
- From the Department of Clinical Sciences; College of Veterinary Medicine; North Carolina State University; Raleigh NC 27607
| | - Daniel L. Chan
- Clinical Science and Services; The Royal Veterinary College; University to London; North Mymms; Hertfordshire UK AL9 7TA
| | - Bobbi Conner
- Department of Small Animal Clinical Sciences; College of Veterinary Medicine; University of Florida; Gainesville FL 32608
| | - Vincent Gauthier
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON N1L 1G6
| | - Marie Holowaychuk
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON N1L 1G6
| | | | - Julie M. Walker
- Department of Medical Sciences; School of Veterinary Medicine; University of Wisconsin-Madison; Madison WI
| | - Darren Wood
- Department of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph ON N1L 1G6
| | - Robert Goggs
- Department of Clinical Sciences; College of Veterinary Medicine; Cornell University; Ithaca NY 14853
| | | |
Collapse
|
11
|
Flatland B, Koenigshof AM, Rozanski EA, Goggs R, Wiinberg B. Systematic evaluation of evidence on veterinary viscoelastic testing Part 2: Sample acquisition and handling. J Vet Emerg Crit Care (San Antonio) 2014; 24:30-6. [DOI: 10.1111/vec.12142] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 11/15/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Bente Flatland
- From the Department of Biomedical and Diagnostic Sciences; College of Veterinary Medicine; University of Tennessee; Knoxville TN 37996
| | - Amy M. Koenigshof
- Department of Small Animal Clinical Sciences; College of Veterinary Medicine, Michigan State University; East Lansing MI 48824
| | - Elizabeth A. Rozanski
- the Department of Clinical Sciences; Cummings School of Veterinary Medicine; Tufts University; North Grafton MA 01536
| | - Robert Goggs
- Department of Clinical Sciences, College of Veterinary Medicine; Cornell University; Ithaca NY 14853
| | | |
Collapse
|
12
|
de Laforcade A, Goggs R, Wiinberg B. Systematic evaluation of evidence on veterinary viscoelastic testing Part 3: Assay activation and test protocol. J Vet Emerg Crit Care (San Antonio) 2014; 24:37-46. [DOI: 10.1111/vec.12147] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 11/15/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Armelle de Laforcade
- From the Department of Clinical Sciences; Cummings School of Veterinary Medicine; Tufts University; North Grafton MA
| | - Robert Goggs
- Department of Clinical Sciences; College of Veterinary Medicine; Cornell University; Ithaca NY, 14853
| | | |
Collapse
|
13
|
Goggs R, Brainard B, de Laforcade AM, Flatland B, Hanel R, McMichael M, Wiinberg B. Partnership on Rotational ViscoElastic Test Standardization (PROVETS): Evidence-based guidelines on rotational viscoelastic assays in veterinary medicine. J Vet Emerg Crit Care (San Antonio) 2014; 24:1-22. [DOI: 10.1111/vec.12144] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 11/15/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Robert Goggs
- From the Department of Clinical Sciences; College of Veterinary Medicine; Cornell University; Ithaca NY 14853
| | - Benjamin Brainard
- Department of Small Animal Medicine & Surgery, College of Veterinary Medicine; University of Georgia; Athens GA 30602
| | - Armelle M. de Laforcade
- Department of Clinical Sciences; Tufts Cummings School of Veterinary Medicine; North Grafton MA 01536
| | - Bente Flatland
- Department of Pathobiology, College of Veterinary Medicine; University of Tennessee; Knoxville TN 37996
| | - Rita Hanel
- Department of Clinical Sciences, College of Veterinary Medicine; NC State University; Raleigh NC 27607
| | - Maureen McMichael
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine; University of Illinois; Urbana IL 61801
| | | |
Collapse
|
14
|
Holowaychuk MK, Hanel RM, Darren Wood R, Rogers L, O'Keefe K, Monteith G. Prospective multicenter evaluation of coagulation abnormalities in dogs following severe acute trauma. J Vet Emerg Crit Care (San Antonio) 2014; 24:93-104. [DOI: 10.1111/vec.12141] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 11/14/2013] [Indexed: 11/27/2022]
Affiliation(s)
- Marie K. Holowaychuk
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON
| | - Rita M. Hanel
- Department of Clinical Sciences; College of Veterinary Medicine; North Carolina State University; Raleigh NC
| | - R. Darren Wood
- Department of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph ON
| | - Lindsey Rogers
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON
| | - Karen O'Keefe
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON
| | - Gabrielle Monteith
- Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph ON
| |
Collapse
|
15
|
Comparison of thromboelastography parameters between different catheter lumen diameters in an uncontrolled haemorrhagic shock model in swine. Blood Coagul Fibrinolysis 2013; 24:581-6. [DOI: 10.1097/mbc.0b013e32835fad68] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
16
|
Abelson AL, O'Toole TE, Johnston A, Respess M, de Laforcade AM. Hypoperfusion and acute traumatic coagulopathy in severely traumatized canine patients. J Vet Emerg Crit Care (San Antonio) 2013; 23:395-401. [PMID: 23855637 DOI: 10.1111/vec.12073] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 06/26/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To determine the incidence of acute traumatic coagulopathy in dogs suffering severe trauma and to investigate the association of markers of hypoperfusion with coagulation abnormalities. DESIGN A prospective observational study performed June, 2009 to February, 2011. SETTING A university teaching hospital. ANIMALS Thirty client-owned dogs weighing >5 kilograms that were presented to the Tuft's Cummings School of Veterinary Medicine following severe trauma as defined by an animal trauma triage score (ATT) ≥5 and having received no resuscitation with IV fluids or blood products prior to blood sampling. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Prior to resuscitation, data obtained at the time of admission to the emergency service included HCT, platelet count, lactate concentration, pH, base excess, thromboelastrogram (TEG), prothrombin time, activated partial thromboplastin time, fibrinogen level, and protein C activity. Rectal temperature and ATT were recorded for all dogs. Neither HCT nor platelet count was significantly decreased in any of the dogs. Based on G values as measured by TEG, 10/30 dogs (33%) showed evidence of hypercoagulability. Hypocoagulability as determined by prothrombin time, activated partial thromboplastin time, or TEG was not shown in any of the 30 dogs. CONCLUSION Dogs with severe trauma may experience hypercoagulability that is unrelated to fluid resuscitation or transfusion therapy. Future studies are warranted to better characterize coagulation changes in dogs with severe trauma, particularly in relationship to fluid therapies and/or hemorrhage.
Collapse
Affiliation(s)
- Amanda L Abelson
- Department of Clinical Sciences, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA 01536, USA.
| | | | | | | | | |
Collapse
|
17
|
Flint SK, Wood RD, Abrams-Ogg ACG, Kruth SA, Bersenas A. Comparison of citrated native and kaolin-activated samples for thrombelastographic analysis in healthy dogs. Vet Clin Pathol 2012; 41:249-55. [PMID: 22551328 DOI: 10.1111/j.1939-165x.2012.00431.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Thrombelastographic (TEG) analysis is a test of global hemostasis in veterinary medicine; however, there have been limited comparisons of analysis of citrated native and kaolin-activated samples. OBJECTIVES The purpose of this study was to determine the variation in TEG variables between citrated native and kaolin-activated whole blood samples and to establish reference intervals for both sample types. METHODS Citrated whole blood samples were obtained from 40 healthy dogs. Thirty minutes after collection, TEG analysis was performed simultaneously on samples with and without kaolin-activation. Reaction time (R), clotting time (K), angle (α), maximum amplitude (MA), global clot strength (G), and clot lysis at 30 minutes (LY30) were recorded, and the concordance correlation coefficient (ρ(c)) was calculated for each sample type. RESULTS Significant differences between results obtained for kaolin-activated and native samples were obtained for R (mean difference -1.3 minute, P = .0009), K (-0.7 minute, P = .0003), α (+5.1º, P = .002), MA (+2.4 mm, P = .002), and G (+568 dyn/cm(2), P = .0009). LY30 was not different between methods. There was substantial agreement between methods for G (ρ(c) = .69) and MA (ρ(c) = .65), moderate agreement for R (ρ(c) = .45) and α (ρ(c) = .44), fair agreement for K (ρ(c) = .29), and slight agreement for LY30 (ρ(c) = .04). CONCLUSIONS The TEG variables were significantly altered by kaolin activation; however, some agreement between sample types suggests a consistent bias. In citrated whole blood activated with kaolin, clot formation time is shortened and the amplitude of the tracing is increased, resulting in a TEG tracing that appears to indicate relative hypercoagulability compared with that obtained using native citrated whole blood samples.
Collapse
Affiliation(s)
- Sarah K Flint
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.
| | | | | | | | | |
Collapse
|
18
|
Goggs R, Wiinberg B. Variability in veterinary thromboelastography. J Vet Emerg Crit Care (San Antonio) 2012; 22:145-7. [DOI: 10.1111/j.1476-4431.2012.00731.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert Goggs
- School of Physiology and Pharmacology; University of Bristol; Bristol; UK
| | | |
Collapse
|
19
|
Blois SL, Banerjee A, Darren Wood R. Evaluation of thrombelastographic platelet-mapping in healthy cats. Vet Clin Pathol 2012; 41:223-7. [DOI: 10.1111/j.1939-165x.2012.00419.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - R. Darren Wood
- Departments of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph; Ontario; Canada
| |
Collapse
|