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. 2020 Nov 4;2020:2514207. doi: 10.1155/2020/2514207

Tranexamic Acid Is Beneficial to Patients Undergoing Open-Wedge High Tibial Osteotomy

De-Sheng Chen 1, Jia-Wang Zhu 1,✉, Tong-Fu Wang 1, Bo Zhu 1, Cai-Hong Feng 1
PMCID: PMC7661119  PMID: 33204689

Abstract

The purpose of this study was to investigate the efficacy of tranexamic acid (TXA) in patients undergoing open-wedge high tibial osteotomy (OWHTO). Patients from August 2018 to May 2020 were retrospectively studied. Clinical data were obtained including gender, age, height, weight, body mass index (BMI), smoking, alcohol consumption, hypertension, diabetes, history of aspirin, prepostoperative hematocrit (Hct) and hemoglobin (Hb), thrombotic events, blood transfusion requirement, hospital length of stay, size of osteotomy gap, and wound complications such as wound hematoma and infection. 52 patients were enrolled in the tranexamic acid group (TA group), and 48 patients were enrolled in the nontranexamic acid group (NTA group); there were no significant differences between both groups in terms of gender, age, BMI, preoperative Hb, size of osteotomy gap, incidence of smoking, alcohol consumption, hypertension, diabetes, history of aspirin, thrombotic events, blood transfusion requirement, and wound hematoma and infection. The mean hospital length of stay was 9.4 ± 1.0 days in the TA group and 11.0 ± 1.2 days in the NTA group (P < 0.001), the blood loss was 296.0 ± 128.7 ml in the TA group and 383.3 ± 181.3 ml in the NTA group (P < 0.05), and the postoperative Hb level was 120.8 ± 15.0 g/l in the TA group and 109.5 ± 13.8 g/l in the NTA group (P < 0.001). In conclusion, the administration of TXA is beneficial to patients undergoing OWHTO via decreasing hospital length of stay, reducing blood loss, and maintaining higher postoperative Hb levels.

1. Introduction

Knee osteoarthritis (OA) is characterized by articular cartilage lesions and underlying bone destruction [1–4]. The global prevalence of knee OA was 3.8%, and knee OA was increasingly recognised as a serious, worldwide public health concern [5–7].

Open-wedge high tibial osteotomy (OWHTO) is a reliable option for knee osteoarthritis with varus malalignment in young, active people [8–11]. This technique is easy to learn and allows precise correction during the surgical procedure; however, it creates an osteotomy gap and increases the risk of bleeding theoretically [12–14].

Perioperative blood loss could be minimized by using a tourniquet and antifibrinolytic agents such as tranexamic acid (TXA) [15–19]. TXA is a synthetic antifibrinolytic drug that inhibits the activation of plasminogen [20, 21]. Relevant studies have confirmed that TXA is effective in reducing perioperative blood loss and transfusion requirements in cardiac, obstetric, and urologic surgery [22–25]. In orthopaedic surgery, a large retrospective cohort study involving over 800000 patients undergoing total hip or knee arthroplasty revealed that the demand for allogeneic or autologous blood transfusions was decreased by up to 69% in the tranexamic acid group [26]. Our previous study revealed that alcohol consumption and BMI are important risk factors related to blood loss in OWHTO [27]; however, there is less research on the effects of TXA in patients' blood management about OWHTO. The purpose of this study was to investigate the efficacy of TXA in patients undergoing OWHTO.

2. Materials and Methods

2.1. Study Design and Patients

We conducted a retrospective cohort study of patients undergoing OWHTO at the Tianjin Hospital from August 2018 to May 2020. Approval from the Institutional Ethics Committee of Tianjin Hospital was obtained, and informed consent was obtained from each participant. The inclusion criteria for participants were as follows: (a) medial knee osteoarthritis with varus deformity requiring correction, (b) first OWHTO on the affected side, and (c) complete clinical and follow-up data. The exclusion criteria were as follows: (a) coagulation disorders, (b) contraindications to TXA, (c) recent thromboembolism or anticoagulant therapy, and (d) simultaneous bilateral HTO.

2.2. Perioperative Management

All patients received standard medical care, and all procedures were performed by the same surgical team. The osteotomy site was fixed with Tomofix plate system. Patients who received tranexamic acid (TA group) were administered intravenous tranexamic acid 1 g before tourniquet inflation and topical tranexamic acid 1 g at osteotomy site; patients in the nontranexamic acid group (NTA group) did not receive any additional treatment. There were no significant differences between the groups in terms of the time of tourniquet use and operative time. Postoperative antibiotic prophylaxis and analgesia were administered in all patients; low molecule weight heparin was used for the prevention of venous thromboembolism. Functional exercise was started after operation, and the blood routine examination was performed 3 days after surgery. All patients received Doppler ultrasound of both lower limbs before discharge, or anytime in suspicion of deep vein thrombosis. The decision of blood transfusion was left to the discretion of anesthesiologist and surgeon; the same discharge criteria were applied in both groups.

2.3. Data Collection

The demographic and clinical data of patients were collected, including gender, age, height, weight, body mass index (BMI), smoking, alcohol consumption, hypertension, diabetes, history of aspirin, the prepostoperative hematocrit (Hct) and hemoglobin (Hb), thrombotic events, blood transfusion requirement, hospital length of stay, size of osteotomy gap, and wound complications such as wound hematoma and infection.

The total blood volume was calculated using height and weight by the formula of Nadler et al. [28]. The blood loss was calculated by the Gross formula [29]. Multiple linear regression analysis was used to investigate the risk factors for blood loss in OWHTO.

2.4. Statistical Analysis

The measurement data were expressed as mean value ± standard deviation (SD); the prepostoperative parameters in the same group were compared using paired t-tests and comparisons between groups were performed using independent sample t-test. The count data were expressed as percentages and analyzed by Chi-square test. The SPSS 22.0 software was used for statistical analysis, and P < 0.05 was considered statistically significant.

3. Results

52 patients were enrolled in the TA group, and 48 patients were enrolled in the NTA group. All patients received optimal wound healing, and none had received blood transfusion. There were no significant differences between both groups in terms of age, BMI, preoperative Hb, and size of osteotomy gap. Chi-square test showed no significant difference in gender and incidence of smoking, alcohol consumption, hypertension, diabetes, history of aspirin, thrombotic events, blood transfusion requirement, and wound hematoma and infection (Table 1).

Table 1.

Patient demographics.

TA group NTA group. P value
Gender (male/female) 20/32 22/26 0.46
Mean age (years) 58.3 ± 10.4  56.6 ± 10.2 0.43
BMI 27.3 ± 4.0  28.5 ± 4.2  0.18
Pre Hb (g/l) 140.0 ± 16.5 137.4 ± 15.0  0.40
Osteotomy gap (mm) 10.3 ± 3.6  10.9 ± 3.3  0.36
Smoking 14 (26.9%) 13 (27.1%) 0.99
Alcohol consumption 16 (30.8%) 15 (31.2%) 0.96
Hypertension 25 (48.1%) 23 (47.9%) 0.99
Diabetes mellitus 9 (17.3%) 10 (20.8%) 0.65
History of aspirin 12 (21.2%) 12 (25.0%) 0.65
Thrombotic events 2 (3.8%) 4 (8.3%) 0.35
Hematoma 2 (3.8%) 5 (10.4%) 0.20
Infection 1 (1.9%) 2 (2.1%) 0.95
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Hb levels decreased significantly after OWHTO in both groups (Figure 1). The mean hospital length of stay was 9.4 ± 1.0 days in the TA group and 11.0 ± 1.2 days in the NTA group (P < 0.001), the blood loss was 296.0 ± 128.7 ml in the TA group and 383.3 ± 181.3 ml in the NTA group (P < 0.05), and the postoperative Hb level was 120.8 ± 15.0 g/l in the TA group and 109.5 ± 13.8 g/l in the NTA group (P < 0.001). There were significant differences in hospital length of stay, blood loss, and postoperative Hb in both groups (Table 2).

Figure 1.

Figure 1

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Hb levels decreased significantly in both groups.

Table 2.

Significant difference between both groups.

TA group NTA group P value
Pos Hb (g/l) 120.8 ± 15.0 109.5 ± 13.8 0.00
Blood loss (ml) 296.0 ± 128.7 383.3 ± 181.3 0.01
hospital length of stay (days) 9.4 ± 1.0 11.0 ± 1.2 0.00
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Multiple linear regression model suggested alcohol consumption and BMI were associated with blood loss in HTO (P < 0.05).

4. Discussion

OWHTO is an accepted and reliable procedure for the treatment of medial compartmental osteoarthritis in young, active individuals with varus deformity [8, 9, 11–13, 30]. However, during OWHTO surgery, extensive soft tissue destruction and osteotomy gap creating induce intraoperative and postoperative bleeding, which prolong recovery time and enhance the risk of infection [12–14]. In our previous study, we confirmed that the blood loss was 383.3 ± 181.3 ml in patients undergoing OWHTO [27].

In recent years, TXA has been widely used to reduce blood loss in knee surgery especially in total knee arthroplasty [31–34]. Meanwhile, there is limited research demonstrating that TXA was effective in reducing blood loss after OWHTO. Palanisamy et al. investigated 156 patients undergoing OWHTO and pointed out that the blood loss was 372 ± 36 ml in the TA group and 635 ± 53 ml in the NTA group [35]. Similarly, Kim et al. investigated 150 patients undergoing OWHTO and pointed out that the blood loss was 502.4 ± 294.9 ml in the TA group and 882.7 ± 482.0 ml in the NTA group [36].

Our findings suggest that Hb levels decreased significantly in both groups after OWHTO; The TA group exhibits significantly higher postoperative Hb levels and lower blood loss compared with the NTA group. Besides, our research has once again demonstrated that alcohol consumption and BMI are important risk factors related to blood loss. Alcohol can disturb the coagulation system at several levels, causing abnormally low platelet numbers such as thrombocytopenia, impaired platelet function such as thrombocytopathy, and diminished fibrinolysis [37–39]. Body surface area and soft tissue were larger in patients with higher BMI [40], which might cause more damage of the soft tissue in OWHTO. Meanwhile, during anaesthesia, increased ventilation pressures required to overcome lower pulmonary compliance in higher BMI patients may result in greater blood loss through higher venous pressures and exudation [41].

Another interesting result from this study is that the administration of TXA can reduce hospital length of stay; a reasonable explanation is that the administration of TXA can decrease joint swelling, promote physical activity, and secure earlier discharge [42–44]. In a study conducted by Floerkemeier et al., 533 patients undergoing OWHTO were reviewed; the hospital length of stay was 8.5 days [45]. Kriegshauser and Bryan pointed out that the hospital length of stay of patients was 10.7 days [46]. In our study, the mean hospital length of stay was 9.4 ± 1.0 days in the TA group and 11.0 ± 1.2 days in the NTA group.

In our study, we have got a remarkable result about the efficacy of TXA in patients undergoing OWHTO; however, the optimal dose and route of administration of TXA in OWHTO are still debated. Palanisamy et al. suggested patients received an intraoperative infusion of TXA 2 g before tourniquet application, and the same amount was repeated in 3 hours [35]. Differently, Suh et al. proposed that topical TXA 2 g can be administered at the osteotomy site [14]. Moreover, Kim et al. pointed out that 10 mg/kg of TXA can be administered via intravenous injection three times [36]. Peak plasma concentrations of TXA are obtained in 5–15 min for intravenous infusion, and the biological half-life is about 2 hours; correspondingly, the operation time of OWHTO is usually within 2 hours [47–49]. Topical TXA can provide a high local concentration, arrest bleeding directly, and reduce blood loss rapidly [48]. Based on the above analysis, the patients in our study received intravenous combined with topical administration of TXA. Overall, our study concluded that the administration of TXA is beneficial to patients undergoing OWHTO via decreasing hospital length of stay, reducing blood loss, and maintaining higher postoperative Hb levels.

This study has several limitations. First, it is a small retrospective study. Second, our research is a single-center study; the results may be biased, and a further larger, multicenter study was needed to confirm our findings.

5. Conclusions

Conclusions should clearly explain the main findings and implications of the work, highlighting its importance and relevance.

Data Availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Conflicts of Interest

The authors declare that there are no conflicts of interest to report regarding the work and publication of this study.

Authors' Contributions

De-Sheng Chen and Tong-Fu Wang contributed equally to this work.

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Data Availability Statement

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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