|Year : 2018 | Volume
| Issue : 4 | Page : 529-534
Single intravenous bolus versus perioperative continuous infusion of tranexamic acid to reduce blood loss in abdominal oncosurgical procedures: A prospective randomized double-blind clinical study
Ramakrishna Prasad, Abhiruchi Patki, Shibany Padhy, Gopinath Ramchandran
Department of Anaesthesiology and Intensive Care, Nizam's Institute of Medical Sciences, Hyderabad, Telangana, India
|Date of Web Publication||3-Jan-2019|
Department of Anaesthesiology and Intensive Care, Nizam's Institute of Medical Sciences, Hyderabad, Telangana
Source of Support: None, Conflict of Interest: None
Background and Aims: Intraoperative use of a single bolus dose of tranexamic acid may not be sufficient to prevent bleeding in the early postoperative period. The present study was carried out to compare the effect of two dose regimens of tranexamic acid in reducing perioperative blood loss and the amount of allogenic blood transfusion in abdominal tumor surgery.
Material and Methods: In this prospective, controlled, and double-blind investigation, 60 patients electively posted for abdominal oncosurgical procedures were randomly assigned to receive a single bolus dose of tranexamic acid (10 mg/kg) (Group A), a bolus dose of tranexamic acid (10 mg/kg) followed by infusion (1 mg/kg/h) till 4 h postoperatively (Group B), and a bolus followed by infusion of normal saline (group C). Total intraoperative blood loss, amount of allogenic blood transfusion, postoperative drain collections, and hemoglobin and hematocrit levels were recorded at different time intervals. Data obtained after comparing three groups were analyzed by analysis of variance test for variables following normal distribution, Kruskal–Wallis test for nonparametric data, and post-hoc Tukey–Kramer test for intergroup analysis. A probability value of less than 5% was considered significant.
Results: There was no significant difference in intraoperative blood loss in all the three groups. Both the tranexamic acid groups showed reduction in postoperative blood collection in drain at 6 h and 24 h in comparison to the control group (P < 0.001). There was also a significant difference in the amount of blood in postoperative drain at 24 h within the tranexamic acid groups, where lesser collection was seen in the infusion group (P = 0.007). Hemoglobin and hematocrit levels measured at different postoperative time intervals showed a significant reduction from the baseline in the control group compared to the tranexamic acid groups together.
Conclusion: Tranexamic acid causes more effective reduction in post-operative blood loss when used as a bolus followed by an infusion continued in the postoperative period in comparison to its use as a single intravenous bolus in abdominal tumor surgery.
Keywords: Antifibrinolytics, blood loss, cancer, tranexamic acid
|How to cite this article:|
Prasad R, Patki A, Padhy S, Ramchandran G. Single intravenous bolus versus perioperative continuous infusion of tranexamic acid to reduce blood loss in abdominal oncosurgical procedures: A prospective randomized double-blind clinical study. J Anaesthesiol Clin Pharmacol 2018;34:529-34
|How to cite this URL:|
Prasad R, Patki A, Padhy S, Ramchandran G. Single intravenous bolus versus perioperative continuous infusion of tranexamic acid to reduce blood loss in abdominal oncosurgical procedures: A prospective randomized double-blind clinical study. J Anaesthesiol Clin Pharmacol [serial online] 2018 [cited 2019 Mar 24];34:529-34. Available from: http://www.joacp.org/text.asp?2018/34/4/529/249288
| Introduction|| |
Maintaining hemostasis in abdominal oncosurgery is a challenge because of unusual long duration of surgical procedures, significant fluid and blood loss, poor nutritional condition secondary to the cancer pathophysiology, grade of the tumor, cancer-related anemia, and fibrous adhesions following previous surgeries and radiotherapy. Decrease in hemoglobin following blood loss is associated with a poor surgical outcome, delayed postoperative ambulation, and increased morbidity.
Abdominal tumor surgeries are known to be associated with excessive blood loss. For example, myomatous uteri have an increased vascularity leading to significant blood loss during myomectomy. Similarly, cytoreductive surgery in advanced ovarian carcinoma with extensive intraperitoneal metastasis stands a high risk of bleeding., Such surgeries carry an increased risk of postoperative anemia and postoperative morbidity owing to blood loss, and therefore, demand appropriate measures for hemostasis.
Tranexamic acid has been extensively studied to reduce blood loss in orthopedic surgery,,,, spine surgery,,, gynecological procedures,,, and cardiac surgery.,, However, evidence-based studies regarding an optimal perioperative hemostatic dose regimen are still lacking. A literature search revealed different dose recommendations of this drug for surgical patients with loading doses ranging from 10 mg/kg to 20 mg/kg and maintenance doses ranging from 0.25 mg/kg/h to 2 mg/kg/h, boluses delivered at regular time intervals, and infusions continued till the end of the surgery, all showing variable effects on perioperative blood loss.,,,,, A bolus dose of 10 mg/kg of tranexamic acid maintains hemostatic plasma concentrations of tranexamic acid for up to 3 h, but higher doses can lead to intravascular thrombosis and seizure-like activity. Low-dose continuous infusions followed after the bolus can therefore avoid the risk of thrombosis or seizures and yet maintain therapeutic concentrations of the drug required to reduce blood loss.
Solid tumors are known to be associated with increased plasma levels of fibrinogen, fibrin-related antigen, and fibrinopeptide A. These factors can potentially cause an inadequacy of plasma levels of tranexamic acid in the early postoperative period in oncosurgical procedures, particularly in the first 6–8 h after surgery, thus demanding extension of antifibrinolytic activity in the same period.
This study was conducted with an aim to investigate the effect of two drug dose regimens of tranexamic acid in reducing perioperative blood loss and their influence on the requirement of allogenic blood transfusion in abdominal tumor surgery. Our hypothesis was that a low dose tranexamic acid infusion continued in the postoperative period would produce better perioperative hemostasis.
| Material and Methods|| |
A prospective, randomized, double-blind study was carried out after the institutional ethics committee approval. After obtaining informed consent, 60 adult, American Society of Anaesthesiologist's classification physical status 1 and 2 patients, both males and females, electively posted for open abdominal tumor surgery in the department of surgical oncology were included as study population. Patients with a history of bleeding diathesis, pulmonary embolism or deep vein thrombosis, those posted for hepatic resection or liver surgery, those posted for laparoscopic tumor removal, and those with a known allergy to tranexamic acid were excluded from the study. Oral anticoagulants and nonsteroidal anti-inflammatory drugs were stopped one day before the surgery. The study population was randomly assigned by a computer-generated randomization table to the following three groups (20 patients each),
Group A: single bolus dose of tranexamic acid (10 mg/kg) 10 min prior to incision (bolus group) followed by normal saline infusion through syringe pump till 4 h postoperatively.
Group B: single bolus dose of tranexamic acid (10 mg/kg) 10 min prior to incision followed by infusion of tranexamic acid through syringe pump (1 mg/kg/h) till 4 h postoperatively (infusion group).
Group C: single bolus of normal saline followed by normal saline infusion through syringe pump (control group).
The drug infusions were prepared by a person who had access to the computer-generated table but was not involved in data collection or patient management perioperatively. Data collection was carried out by a person who was completely blinded to the randomization. The person who analyzed the data statistically was not involved in randomization or data collection. Total volume of the composed drug formulation and placebo (normal saline), wherever required, was kept similar in the three groups to achieve effective blinding.
Baseline values of hemoglobin and hematocrit level were noted preoperatively. All the patients received general anesthesia. The patients received IV glycopyrrolate (15 g/kg), fentanyl citrate (2 g/kg) and pantoprazole (0.8 mg/kg) as premedication, thiopentone sodium (5–7 mg/kg) for induction and rocuronium bromide (0.6 mg/kg) for intubation. Thereafter they received fentanyl citrate (0.3 g/kg/h), atracurium (0.5 mg/kg/h) as intravenous infusions along with isoflurane, the dial concentration of which was adjusted to maintain a mean arterial pressure within 20% of the baseline reading.
Intraoperative monitoring included pulse oximetry, 5 lead electrocardiograph, capnography, urine output, core temperature, invasive blood pressure, and central venous pressure. Arterial blood gas analysis was done, as and when required, to monitor blood gases, electrolytes, and blood sugar. Epidural analgesia was used for pain relief which was continued in the postoperative period till one day.
Total volume of intravenous fluids infused and whole blood units or blood products transfused were noted. Total duration of surgery in minutes (from skin incision to skin closure) was noted.
Intraoperative blood loss was the primary outcome which was assessed by subtracting the volume of 0.9% saline used as intra-abdominal rinse (or wash) from collection in the suction apparatus and also by counting the number of 75% soaked sponges by visual assessment. (size 30 × 30 cm saline soaked cotton laparotomy sponges were used for all the surgeries). According to available literature, the mean absorptive volume at 75% saturation of a 30 × 30 cm saline soaked laparatomy sponge has been estimated to be 75–80 ml. As wetting of the above stated sized sponge reduces the absorptive capacity of the sponge by 25–30%, 1 soaked sponge was taken as 50 ml of blood loss for calculation. A transfusion trigger for blood loss of more than 20% of total blood volume or hemoglobin concentration less than 8 g/dl, whichever was less, was followed in all the cases. The decision to transfuse allogenic blood was made by the same attending consultant anesthesiologist in all the cases on the basis of the transfusion triggers.
Postoperative blood loss was assessed by collection in the drain at the end of 6 h, at the end of 24 h, and from 24–48 h postoperatively (2nd day). Hemoglobin and hematocrit levels were also recorded 6 h after surgery, 24 h, and 48 h postoperatively.
Patients were monitored clinically for evidence of deep vein thrombosis (DVT) twice daily till discharge. They were assessed for calf swelling, tenderness, and edema of the leg on clinical examination. All the patients were started on daily thromboprophylaxis for DVT from the 1st postoperative day with enoxaparin 40 mg administered subcutaneously. Patients were monitored for convulsions or seizure-like episodes in the postoperative period till discharge.
Sample size calculation
On the basis of the findings in four similar studies,,,, to detect a mean difference of 225 ml in the intraoperative blood loss between the three groups, with a standard deviation of 200 ml, a sample size (N) of minimum 57 was calculated, keeping a power (1-β error probability) of 0.95 and effect size of 0.54 using F-tests-analysis of variance (ANOVA) and G power 22.214.171.124 software. The sample size was subsequently rounded off to 60 (20 in each group).
Statistical analysis was done by using ANOVA test to find significance of the study parameters showing normal distribution within the three groups, Post-Hoc Tukey (two-tailed, independent) to find the significance of study parameters on continuous scale between the groups (intergroup analysis), and Kruskal–Wallis test to find the significance for nonparametric distribution, using SAS 9.0 (SAS institute, North Carolina State University, USA), SPSS15.0 (IBM corporation, New York, United States), Stata10.1 (StataCorp LLC, Texas, USA), and R environment ver. 2.11.1 statistical software. Significance was assessed at a level of 5% (P < 0.05). Microsoft Excel was used to generate graphs and tables.
| Results|| |
Demographic data and the mean duration of surgery, which were taken as the time from surgical incision to surgical closure, were comparable in all the three groups, as shown in [Table 1]. The types of surgeries performed in the three groups are presented in [Table 2].
|Table 2: Distribution of patients according to type of surgery performed|
Click here to view
Total intraoperative blood loss was similar in all the three groups [Table 3]. Both the tranexamic acid groups showed statistically significant reduction in the mean postoperative drain collection at 24 h in comparison to the control group. There was also a highly significant difference in the postoperative drain at 24 h within the tranexamic acid groups, where lesser collection was seen in the infusion group (Group B) (post hoc Tukey–Kramer analysis; P = 0.017). Drain collections in all the three groups were similar between 24-48 h postoperatively, with no statistical difference within the groups [Table 3].
|Table 3: Intra-operative and Postoperative blood loss in milliliters (ml) at different time intervals in the three groups|
Click here to view
There was no significant difference in hemoglobin levels at 6, 24, and 48 h in the two tranexamic acid groups when compared with their baseline values. However, there was a statistically significant reduction in hemoglobin at 6, 24, and 48 h between the three groups. These differences in hemoglobin were statistically significant but not clinically significant. Similar results were reflected as hematocrit values at different time intervals [Table 4].
|Table 4: Hematologic indices in the three groups at different time intervals|
Click here to view
Out of the total 6 blood transfusions given in the intraoperative period, 4 transfusions were given in patients of the group C and one each in both Group A and Group B (P = 0.344). There was no incident of allergic reaction, perioperative thromboembolic event, postoperative calf tenderness or any postoperative convulsions or seizure-like activity.
| Discussion|| |
In our study, the use of tranexamic acid by both the techniques did not significantly affect intraoperative blood loss when compared to the placebo group, a finding similar to a few more studies.,,, It has been observed that tranexamic acid predominantly reduces postoperative blood loss by capillary ooze owing to its antifibrinolytic activity rather than reducing active bleeding, and our results assert the observation.
However, its use significantly reduced postoperative bleeding in our patients when compared to placebo, resulting in better preservation of hematological indices. Our results were comparable to studies where similar parameters were used to assess blood loss in different types of surgeries with the intraoperative use of tranexamic acid.,,,,,
We used tranexamic acid in two different ways, as a single bolus dose and as an infusion continued in the early postoperative period after a single dose bolus. There was a significant difference in postoperative bleeding at the end of 24 h with the continuous infusion when compared with the single bolus method. A single bolus dose of tranexamic acid of 10 mg/kg produces a therapeutic plasma concentration of 5–10 μg/ml which lasts only for three hours. The effect of a larger dose (20 mg/kg) lasts for approximately 8 h, but carries the potential risk of thrombotic activity which can pose a greater threat to the well-being of the patient. Repeated boluses at regular time intervals may not produce uniform plasma concentrations resulting in unpredictable antifibrinolytic activity. The early postoperative period is marked by increased release of tissue plasminogen activators resulting in increased fibrinolysis, and is thus, the time when optimum levels of antifibrinolytic activity are required. Therefore, we postulated that a low-dose continuous infusion extending into the early postoperative period would make a significant difference in the management of hemostasis and our results affirmed this. The dose of tranexamic acid in our study was based on a regimen used by a similar study carried out in a population undergoing hip arthroplasty procedures. Hepatic tumor resection is known to be associated with variable hyperfibrinolytic states. Therefore, anticipating variable results, we excluded liver tumor surgeries from our study population.
Tranexamic acid in higher doses (above 45 mg.kg−1) has been associated with postoperative seizures, and the two traditionally hypothesized reasons for this proconvulsant activity are: (1) cerebral vasospasm or cerebral artery thrombosis and (2) inhibition of ɣ amino butyric acid-A receptors in the brain.,,, The total dose used in our study was smaller than 45 mg.kg−1 and none of our patients showed this complication.
Literature suggests the theoretical possibility of a hypercoagulable state with the use of tranexamic acid. There was no evidence of DVT in the postoperative period in our study population, a finding similar to some more similar studies included in a large meta-analysis.,
We estimated perioperative blood loss by the visual estimation method, that is, by measuring collection in the suction apparatus and drain and by counting the number of soaked sponges intraoperatively. Methods such as gravimetric estimation (photometric estimation) and other miscellaneous methods (e.g., mathematical calculation, use of a visual analogue scale etc.) have been documented in literature with varying accuracy., We chose this method in our study owing to the lack of availability and practicality of other more accurate methods.
Our study was not devoid of limitations. The use of thromboelastography in addition to hematological indices could have made our data even more complete and accurate. Second, the method of assessment of perioperative blood loss which we used was crude and subject to potential variability from observer to observer. Third, we relied on clinical signs and symptoms of DVT, where radioimaging with an ultrasonic Doppler would have perhaps picked up the most initial stages of thrombosis if any were to occur.
| Conclusion|| |
We thus conclude that tranexamic acid more effectively reduces blood loss when used as a bolus followed by an infusion continued in the postoperative period in comparison to its use as a single intravenous bolus in abdominal tumor surgery.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
| References|| |
Masoomi H, Kang C, Chen A, Mills S, Dolich M, Carmichael J, et al
. Predictive factors of in-hospital mortality in colon and rectal surgery. J Am Coll Surg 2012;215:255-61.
Weber R, Jabbour N, Martin R. Anemia and transfusions in patients undergoing surgery for cancer. Ann Surg Oncol 2008;15:34-45.
Discepola F, Valenti D, Reinhold C, Tulandi T. Analysis of arterial blood vessels surrounding the myoma: Relevance to myomectomy. Obstet Gynecol 2007;110:1301.
Morrison J, Haldar K, Kehoe S, Lawrie T. Chemotherapy versus surgery for initial treatment in advanced ovarian epithelial cancer. Cochrane Database Syst Rev 2012:CD005343.
Johansson T, Pettersson L, Lisander B. Tranexamic acid in total hip arthroplasty saves blood and money: A randomized, double-blind study in 100 patients. Acta Orthop 2005;76:314-9.
Eubanks J. Antifibrinolytics in major orthopaedic surgery. J Am Acad Orthop Surg 2010;18:132-8.
Sukeik M, Alshryda S, Haddad F, Mason J. Systematic review and meta-analysis of the use of tranexamic acid in total hip replacement. J Bone Joint Surg Br 2011;93:39-46.
Hourlier H, Fennema P. Single tranexamic acid dose to reduce perioperative morbidity in primary total hip replacement: A randomized clinical trial. Br J Anaesth 2014;24:63-6.
Sethna N, Zurakowski D, Brustowicz R, Bacsik J, Sullivan L, Shapiro F. Tranexamic acid reduces intraoperative blood loss in paediatric patients undergoing scoliosis surgery. Anesthesiology 2005;102:727-32.
Neilipovitz D, Murto K, Hall L, Barrowman N, Splinter W. A randomized trial of tranexamic acid to reduce blood transfusion for scoliosis surgery. Anesth Analg 2001;93:82-7.
Grant J, Howard J, Luntley J, Harder J, Aleissa S, Parsons D. Perioperative blood transfusion requirements in pediatric scoliosis surgery: The efficacy of tranexamic acid. J Ped Orthopaed 2009;29:300-4.
Celebi N, Celebioglu B, Selcuk M, Canbay O, Karagoz AH, Aypar U. The role of antifibrinolytic agents in gynecological cancer surgery. Saudi Med J 2006;27:637-41.
Kriplani A, Kulshrestha V, Agarwal N, Diwakar S. Role of tranexamic acid in management of dysfunctional uterine bleeding in comparison with medroxyprogesterone acetate. J Obs Gynaecol 2006;26:673-8.
Sarris I, Arafa A, Konaris L, Kadir R. Topical use of tranexamic acid to control perioperative local bleeding in gynaecology patients with clotting disorders: Two cases. Haemophil 2007;13:115-6.
Andreasen J, Nielsen C. Prophylactic Tranexamic acid in elective, primary coronary artery bypass surgery using cardiopulmonary bypass. Eur J Card Surg 2004;26:311-7.
Dowd N, Karski J, Cheng D, Carroll J, Lin Y, James R, et al
. Pharmacokinetics of tranexamic acid during cardiopulmonary bypass. Anesthesiology 2002;97:390-9.
Fiechtner B, Nuttall G, Johnson M, Dong Y, Sujirattanawimol N, Oliver Jr W, et al
. Plasma tranexamic acid concentrations during cardiopulmonary bypass. Anesth Analg 2001;92:1131-6.
Ozier Y, Schlumberger S. Pharmacological approaches to reducing blood loss and transfusions in the surgical patient. Can J Anesth 2006;53:S21-9.
Gupta K, Rastogi B, Krishan A, Gupta A, Singh V, Agrawal S. The prophylactic role of tranexamic acid to reduce blood loss during radical surgery: A prospective study. Anesth Essays Res 2012;6:70-3. [Full text]
Hiippala S, Strid L, Wennerstrand M, Arvela J, Niemelä H, Mäntylä S, et al
. Tranexamic acid radically decreases blood loss and transfusions associated with total knee arthroplasty. Anesth Analg 1997;84:839-44.
Benoni G, Fredin H, Knebel R, Nilsson P. Blood conservation with tranexamic acid in total hip arthroplasty: A randomized, double-blind study in 40 primary operations. Acta Orthop Scand 2001;72:442-8.
Zufferey P, Miquet M, Quenet S, Martin P, Adam P, Albaladejo P, et al
. Tranexamic acid in hip fracture surgery: A randomized controlled trial. Br J Anaesth 2010;104:23-30.
Benoni G, Bjorkman S, Fredin H. Application of pharmacokinetic data from healthy volunteers for the prediction of plasma concentrations of the tranexamic acid in surgical patients. Clin Drug Investig 1995;10:280-7.
Dhir A. Antifibrinolytics in cardiac surgery. Ann Card Anaesth 2013;16:117-25.
] [Full text]
Benoist S, Panis Y, Pannegeon V, Alves A, Valleur P. Predictive factors for perioperative blood transfusion in rectal resection for cancer. A Multivariate analysis of a group of 212 patients. Surgery 2001;129:433-9.
Ali Algadiem E, Aleisa A, Alsubaie H, Buhlaiqah N, Algadeeb J, Alsneini H. Blood Loss Estimation Using Gauze Visual Analogue. Traum Mon 2016;21:34131.
Wong J, El Beheiry H, Rampersaud Y, Lewis S, Ahn H, De Silva Y, et al
. Tranexamic Acid reduces perioperative blood loss in adult patients having spinal fusion surgery. Anesth Analg 2008;107:1479-86.
Rajesparan K, Biant L, Ahmad M, Field R. The effect of an intravenous bolus of tranexamic acid on blood loss in total hip replacement. Bone Joint J 2009;91:776-83.
Orpen N, Little C, Walker G, Crawfurd E. Tranexamic acid reduces early post-operative blood loss after total knee arthroplasty: A prospective randomised controlled trial of 29 patients. Knee 2006;13:106-10.
Ker K, Edwards P, Perel P, Shakur H, Roberts I. Effect of tranexamic acid on surgical bleeding: Systematic review and cumulative meta-analysis. BMJ 2012;344:e3054.
Claeys M, Vermeersch N, Haentjens P. Reduction of blood loss with tranexamic acid in primary total hip replacement surgery. Acta Chir Belg 2007;107:397-401.
Sigaut S, Tremey B, Ouattara A, Couturier R, Taberlet C, Grassin-Delyle S, et al
. Comparison of two doses of tranexamic acid in adults undergoing cardiac surgery with cardiopulmonary bypass. Anesthesiology 2014;120:590-600.
Thipparampall A, Gurajala I, Gopinath R. The effect of different dose regimens of tranexamic acid in reducing blood loss during hip surgery. Indian J Anaesth 2017;61:235-9.
] [Full text]
Wu C, Ho W, Cheng S, Yeh D, Wen M, Liu T, et al
. Perioperative parenteral tranexamic acid in liver tumor resection: A prospective randomized trial toward a “blood transfusion”-free hepatectomy. Ann Surg 2006;243:173-80.
Lecker I, Wang D, Whissell P, Avramescu S, Mazer C, Orser B. Tranexamic acid-associated seizures: Causes and treatment. Ann Neurol 2016;79:18-26.
Murkin J, Falter F, Granton J, Young B, Burt C, Chu M. High-dose tranexamic acid is associated with nonischemic clinical seizures in cardiac surgical patients. Anesth Analg 2010;110:350-3.
Martin K, Knorr J, Breuer T, Gertler R, Macquill M, Lange R, et al
. Seizures after open heart surgery: Comparison of epsilon-aminocaproic acid and tranexamic acid. J Cardiothorac Vasc Anesth 2011;25:20-5.
Sander M, Spies C, Martiny V, Rosenthal C, Wernecke K, von Heymann C. Mortality associated with administration of high dose tranexamic acid and aprotinin in primary open-heart procedures: A retrospective analysis. Crit Care 2010;14:R148.
Sundström A, Seaman H, Kieler H, Alfredsson L. The risk of venous thromboembolism associated with the use of tranexamic acid and other drugs used to treat menorrhagia: A case–control study using the General Practice Research Database. BJOG 2009;116:91-7.
Gill J, Rosenstein A. The use of antifibrinolytic agents in total hip arthroplasty: A meta-analysis. J Arthroplasty 2006;21:869-73.
Adkins A, Lee D, Woody DJ, White WJ. Accuracy of blood loss estimations among anesthesia providers. AANA J 2014;82:300-6.
Schorn MN. Measurement of blood loss: Review of the literature. JMWH 2010;55:20-7.
[Table 1], [Table 2], [Table 3], [Table 4]