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Incidence and risk factors of perioperative deep vein thrombosis in patients undergoing primary hip arthroplasty via the direct anterior approach
Journal of Orthopaedic Surgery and Research volumeĀ 19, ArticleĀ number:Ā 10 (2024)
Abstract
Background
Deep vein thrombosis (DVT) is a frequent complication following hip arthroplasty. There still has been a lack of studies analyzing the perioperative risk factors of DVT following hip arthroplasty via direct anterior approach (DAA).
Methods
Patients who underwent unilateral primary hip arthroplasty via DAA in our hospital from August 2015 to January 2022 were included. Patientsā data, including demographic data, clinical features, past medical history, operative data, and laboratory data, were analyzed and compared between patients with and without DVT. Logistic regression analysis was conducted to identify the independent risk factors. Receiver operating characteristic (ROC) curve analysis was used to assessĀ theĀ best cutoff value of continuous variables with statistical significance.
Result
A total of 651 patients were included. The incidence of DVT before and after hip arthroplasty was 12.7% and 6.7%, respectively. Logistic regression analysis indicated that ageāā„ā65Ā years (OR 4.594, 95% CI 1.994ā10.587), women (OR 2.331, 95% CI 1.285ā4.227), and cerebral infarction (OR 1.984, 95% CI 1.138ā3.460) were independent risk factors for preoperative DVT. And ageāā„ā65Ā years (OR 4.859, 95% CI 1.062ā22.226), tumor (OR 3.622, 95% CI 1.108ā11.841), and preoperative D-dimer (OR 1.040, 95% CI 1.004ā1.078) were risk factors for postoperative DVT. The ROC curve analysis showed that the best cutoff value of preoperative D-dimer for the diagnosis of postoperative DVT is 1.44Ā mg/L.
Conclusions
The incidence of DVT in patients undergoing DAA hip arthroplasty was low and the occurrence of DVT before and after unilateral primary hip arthroplasty performed through DAA was related to multiple factors.
Introduction
HipĀ arthroplastyĀ isĀ aĀ commonĀ surgicalĀ procedureĀ inĀ orthopedic surgery to treat hip diseases [1, 2]. AsĀ theĀ populationĀ agesĀ andĀ theĀ prevalenceĀ ofĀ the above hip diseases are rising quickly, a large number of people have to receive hip arthroplasty treatment [3]. More than 1,000,000 total hip arthroplasties (THAs)Ā are performed annually worldwide [4]. With more patients nowĀ undergoing jointĀ arthroplasty, a postoperativeĀ complicationĀ such asĀ deepĀ veinĀ thrombosis (DVT)Ā hasĀ alsoĀ increasedĀ accordingly. The direct anterior approach (DAA) is a more minimally invasive operative approach for hip arthroplasty and is considered to be the least traumatic to the muscle tissues with less postoperative pain, faster recovery, and shorter hospitalization [5,6,7]. Theoretically, the incidence of DVTĀ is expected to decrease accordingly. Previous studies have only focused on the incidence and risk factors for postoperative DVT after hip arthroplasty via conventional or other unknown approaches [8, 9]. So far, there still has been a lack of studies analyzing the risk factors for DVT after hip arthroplasty via DAA.
It has beenĀ reportedĀ that the incidence of DVT in patients following hip arthroplasty without thromboprophylaxis is approximately 42ā57% [10]. DVT can cause long-term complications such as post-thrombotic syndrome [11,12,13] and fatal complications such as pulmonary embolism [14], the latter of whichĀ notĀ onlyĀ brings negativeĀ consequencesĀ to theĀ patients but alsoĀ generates a heavy economic burden toĀ other family members and the healthcare system [15, 16]. Therefore, identifying the risk factors and early intervention of DVT emerge as an important method to avoid further damage. However, most previous studies haveĀ only focused on the analysis of risk factors and prevention ofĀ DVT before or after hipĀ arthroplasty separately. Relatively fewer studies focused on the analysis of risk factors throughout the entire perioperative period, possibly leading high-riskĀ patients to missĀ effectiveĀ interventionĀ before surgery.
Therefore, we retrospectively reviewedĀ perioperativeĀ dataĀ of patients who underwentĀ primary hip arthroplasty via DAAĀ inĀ ourĀ hospital to analyze their clinical characteristics and explore the preoperative and postoperative DVT risk factors. We aimed to provide a reference for the early identification of risk factors and individualized thromboprophylaxis to further reduce the perioperative incidence of DVT in patients undergoing hip arthroplasty.
Methods
Ethics
All methods were carried out in accordance with the Declaration of Helsinki. Informed consent to participate was obtained from all patients included in the study. All procedures were performed by the same senior surgeon with extensive experience in hip arthroplasty. This study had been approved by the Medical Ethics Committee of our hospital.
Patients
From August 2015 to January 2022, a total of 2677 patients underwent hip arthroplasty in our joint center. We excluded 1709 patients who had hip arthroplasty by other surgeons; 241 patients who underwent hip arthroplasty performed through other surgical approaches; 76 patients who had other surgical modalities, leaving 651 patients who underwent unilateral primary hip arthroplasty performed through DAA for analyses. The detailed participantsā selection process is shown in Fig.Ā 1.
The diagnosis of DVT of the lower extremity
Once admission, a Sonosite M-Turbo ultrasound system was used to perform Doppler ultrasound examinations on the lower limbs in all patients. An ultrasound scan was performed 1Ā day preoperatively, on the first and third postoperative day and on the day of discharge from hospital. Loss of vein compressibility was considered diagnostic evidence of DVT. Routine scanning was performed for the proximal vein and distal vein thrombosis of bilateral lower extremities.
DVT preventions
Of these patients who met the inclusion criteria, 52 patients were taking antiplatelet or anticoagulant medications preoperatively. All these medications were discontinued and changed to the low molecular weight heparin (0.4Ā ml/d) upon admission. Eight hours after operation, all patients were given low molecular weight heparin (0.4Ā ml/d) daily until the day of dischargeĀ (For patients who developed subcutaneous hematoma or patients with poor drug compliance, oral rivaroxaban (10Ā mg/d) daily wasĀ selected). All patients received pneumatic pump therapy applied to both lower extremity and performed ankle pumping exercises (200 times/day) postoperatively. From the first day after the surgery, patients were encouraged to start isometric contraction of muscles of the lower extremities and instructed to perform active and passive activities of joints. Drains were removed within 48Ā h after surgery, and patients were then encouraged to walk with a walking aid.
Surgical procedures
All patients underwent hip arthroplasty by the same surgeon. Patients were placed in the supine position, and the operation was conducted under general anesthesia combined with a femoral nerve block. At operation, a line was drawn between the superolateral border of the patella and the anterior superior iliac spin on the same side. Then, an 8 to 10Ā cm incision was made at a levelĀ 3Ā cmĀ parallelly outside this line. After incising the skin, the subcutaneous fat down to the deep fascia was incised, which is incised longitudinally. A blunt dissection was performed along the spaces between the tensor fascia lata and rectus femoris and then the branches of the lateral circumflex femoral artery were dissected and ligated. The fat surrounding the joint capsule was removed, and the muscle was carefully detached from the joint capsule to expose the joint capsule. Next, the joint capsule was opened to expose the femoral head and neck, an osteotomy of the femoral neck was done, and the femoral head was removed. For patients with total hip arthroplasty, the acetabulum was cleaned and then pared until blood oozing in the subchondral bone was visible, and theĀ proper acetabular cup and acetabular liner were mounted. In further continuation, the affected limb was maintained by utilizing external rotation, adduction, and posterior extension position. After the proximal femur was lifted, the femoral components and femoral head prosthesis were implanted and reduced. Finally, the deep fascia, subcutaneous tissues, and skin were sutured layer by layer.
Data collection
We collected patientsā information including age, gender, body mass index (BMI), historyĀ of hypertension, diabetes, cardiovascular disease, cerebral infarction, tumor and anticoagulation, surgical factors including duration of surgery, intraoperativeĀ blood loss, and postoperative information including postoperativeĀ bed restĀ time and postoperative drainage volume. The formation time, location, and type of DVT were also collected. The laboratory indicators collected before and after surgery included triglyceride level, cholesterol level, apolipoproteinĀ A level, apolipoproteinĀ B level, hemoglobin level, red blood cell (RBC) level, hematocrit (HCT) level, platelet level, activated partial thromboplastin time (APTT) level, prothrombin time (PT) level, thrombin time (TT) level, fibrinogen level, and D-dimer level. Of these, the postoperative D-dimer was measured on the third postoperative day, and other postoperative indicators were measured on the first day after surgery.
Statistical analysis
Statistical analysis was carried out using SPSS v. 26 (IBM Corp., Armonk, NY, USA). ShapiroāWilk test was used to determine whether the continuous data were normally distributed. Normally-distributed data were analyzed by independent-sample t-test, and the results were expressed as meanāĀ±āstandard deviation (xāĀ±ās). Non-normally distributed data were tested by the MannāWhitney U test, and the results were expressed as median (quartile) [M (Q1, Q3)]. Categorical variables were expressed as counts and evaluated using the Chi-squared test. The statistically significant variables in univariate analysis were then included in multivariate logistic regression analysis to determine independent risk factors. Then continuous variables with statistical significance in the multivariate logistic regression analysis were analyzed to assessĀ theĀ best cutoff value byĀ ROCĀ curves. Pā<ā0.05 was the significance threshold for this study.
Results
The characteristics of included patients
A total of 651 patients undergoing unilateral primary hip arthroplasty through the DAA were finally included, 38.6% of whom were men. The mean age of the included patients was 68.3Ā years. And the average length from surgery to discharge and the overall hospital stay for the included patients were 4.8 and 8.5Ā days, respectively. The incidence of DVT before hip arthroplasty was 12.7%, and the occurrence ofĀ new-onset DVT after the surgery was 6.7%. All patients with DVT were asymptomatic. The distribution of perioperative DVT is summarized in TableĀ 1.
The risk factors of preoperative DVT
The univariate analysis is shown in TableĀ 2, and the results showed that there were significant differences in ageāā„ā65Ā years (Pā<ā0.001), women (Pā<ā0.001), diabetes (Pā=ā0.004), cardiovascular disease (Pā=ā0.032), cerebral infarction (Pā<ā0.001), triglyceride (Pā=ā0.029), preoperativeĀ hemoglobin (Pā=ā0.019), preoperativeĀ RBC (Pā=ā0.046), preoperativeĀ HCT (Pā=ā0.023), preoperative PT (Pā=ā0.014), preoperative fibrinogen (Pā<ā0.001), preoperative TT (Pā=ā0.013), and preoperative D-dimer (Pā<ā0.001) between DVT and non-DVT group.
We included these factors into further multivariate logistic regression analysis, and the results showed that ageāā„ā65Ā years (OR 4.594, 95% CI 1.994ā10.587), women (OR 2.331, 95% CI 1.285ā4.227), and cerebral infarction (OR 1.984, 95% CI 1.138ā3.460) were independent risk factors for preoperative DVT in patients awaiting primary hip arthroplasty (Fig.Ā 2).
The risk factors of postoperative DVT
As shown in TableĀ 3, the univariate analysis showed that there were significant differences in ageāā„ā65Ā years (Pā<ā0.001), hypertension (Pā=ā0.022), tumor (Pā=ā0.001), triglyceride (Pā=ā0.032), preoperative D-dimer (Pā<ā0.001), postoperativeĀ platelet (Pā=ā0.009), and postoperative PT (Pā=ā0.030) in DVT group compared with the non-DVT group.
The subsequent multivariate logistic regression analysis showed that ageāā„ā65Ā years (OR 4.859, 95% CI 1.062ā22.226), tumor (OR 3.622, 95% CI 1.108ā11.841), and preoperative D-dimer (OR 1.040, 95% CI 1.004ā1.078) were independent risk factors for postoperative DVT (Fig.Ā 3). ROC curve analysis showed that the best cutoff value of preoperative D-dimer in the diagnosis of new-onset DVT was 1.44Ā mg/L. The sensitivity was 73.7%, specificity was 64.6%, and the area under the curve was 0.732 (95% CI 0.658ā0.806), Pā<ā0.001, statistically significant (Fig.Ā 4Ā andĀ TableĀ 4).
Discussion
In the present study, most of the preoperative thrombus and newly formed postoperative thrombus were distal DVT of the affected side. The incidence of DVT before hip arthroplasty was 12.7% (83/651), which is in good accordance with those of previous reports (5.2ā12.3%) [17,18,19]. Interestingly, the occurrence ofĀ new-onset postoperative DVT was 6.7% (38/568), which is lower than that reported by previous reports [20,21,22]. On the one hand, DAA may minimize the occurrence of femoral vein occlusion compared to other approaches, thus possibly reducing the incidence of postoperative DVT [23, 24]. On the other hand, the reported advantages of DAA include less soft tissue injury, less blood loss, fewer postoperative pain, faster recovery time, and shorter hospitalization compared with other traditional approaches, which have been reported to be associated with a lower incidence of DVT [25, 26].
Older age is a well-known risk factor for DVT in patients following surgery, which has been incorporated into some thrombosis prevention scoring systems [20, 27, 28]. Our results also showed that ageāā„ā65 was the risk factor for both preoperative and postoperative DVT, which is in accordance with previous studies [8, 21, 29]. Possible reasons could be age-related remodeling of the venous wall [30, 31], low cardiorespiratory fitness, and diminished activity of the calf muscle pump in the elderly, all of which led to slow blood flow and high susceptibility to DVT.
In our research, we observed that female patients exhibited a higher incidence of both preoperative and postoperative DVT, which is consistent with previous studies [29, 32, 33]. The possible reason could be most of the subjects in our study were postmenopausal women and the change in sex hormone levels could cause dyslipidemia, which could increase the incidence of venous thromboembolism[34, 35]. Patients with cerebral infarction are more prone to venous thromboembolic events explained by longer bed rest time and a decrease in lower leg muscle pump action due to limb hemiplegia [36, 37]. Luanjiao Hu et al. found that the incidence of lower extremity DVT in patients with ischemic stroke hemiplegia is up to 18.57% and can drop to 1.89% after early rehabilitation nursing [38].
A previous study showed that the prevalence of venous thromboembolism in patients with malignant tumors was sevenfold higher than that of patients without malignant tumors [39]. In our study, 29 patients had a history of tumor, of whom 25 had a malignant tumor, one had a benign tumor, and 3 had a history of tumors without definite diagnosis. Our results also showed that patients who had a tumor history were more likely to develop postoperative DVT. On the one hand, tumor cells are known to secrete procoagulant active substances such as tissue factor, and this can cause hypercoagulability [40]. On the other hand, antitumor therapy may also increase the risk of DVT.
D-dimers are the products of fibrin degradation that appear in the blood after blood clot destruction and have been widely used for DVT screening [41,42,43,44]. However, D-dimer shows high sensitivity but low specificity because it may also be elevated in inflammatory, infection, trauma, surgery, bleeding, pregnancy, and cancer situations [43, 45]. This could be one possible explanation for the non-significant difference in D-dimer value between DVT and non-DVT groups on postoperative days 3 in this study. Thomas et al. [46] also showed that D-dimer is not a useful screening test for the diagnosis of DVT postoperatively. They determined that 92% of patients had serum D-dimer measurements higher than the institutional threshold (0.40Ā mg/ L) at 6Ā weeks after hip arthroplasty. Nevertheless, our results demonstrated that preoperative D-dimer is a potential predictor for postoperative DVT in patients undergoing DAA hip arthroplasty, and the optimal cutoff was 1.44Ā mg/ L by ROC curve. These findings were consistent with that reported by Yuichiro Shimoyama et al. [47] with difference in the preoperative plasma D-dimer cutoff value, which could be due to the difference in the study population and surgical approaches. Accordingly, if a patientās preoperative D-dimer is above 1.44Ā mg/L, the clinicians should confirm whether the patient has symptoms such as pain or swelling of the affected limb and are encouraged to conduct an ultrasound examination of the lower extremities to identify postoperative DVT as early as possible.
This study has some limitations that warrant consideration. First, this study was a single-center retrospective study, thus limiting the external validity of our findings in other populations. Second, ultrasonography was performed only within postoperative 7Ā days, which is likely to ignore patients who developed DVT after discharge, thus underestimating the incidence of postoperative DVT. Last, as our study is limited due to its retrospective nature, other potential risk factors for DVT, such as preoperative activities of daily living impairment [48, 49], were not included in the analysis. ItĀ would be valuableĀ toĀ investigate the relationship between preoperative WOMAC score and the incidence of DVT. In the future, a prospective, multicenter, randomized controlled, large-sample study is needed to further explore the risk factors of perioperative DVT in patients requiring hip arthroplasty.
Conclusions
In summary, the incidence of DVT in patients undergoing DAA hip arthroplasty was low, and the occurrence of DVT before and after unilateral primary hip arthroplasty performed through DAA was related to multiple factors. Clinicians and other medical staff should recognize these risk factors as early as possible to take effective prevention measures, thereby reducing the occurrence and development of perioperative DVT.
Availability of data and materials
All datasets used and analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work was supported by the National Key Research and Development Project (2021YFA1201404), Major Project of NSFC (81991514), Jiangsu Province Medical Innovation Center of Orthopedic Surgery (CXZX202214), Jiangsu Provincial Key Medical CenterĀ Foundation, Jiangsu Provincial Medical Outstanding Talent Foundation, Jiangsu Provincial Medical Youth Talent Foundation and Jiangsu Provincial Key Medical Talent Foundation, the Fundamental Research Funds for the Central Universities (14380493, 14380494), Young Scientists Fund of the Natural Science Foundation of China (Ref No. 82202755), andĀ Young Scientists Fund of the Natural Science Foundation of Jiangsu Province, China (Ref No. BK20220183).
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ZKZ, QQL, DYC, and QJ conceived the study; ZKZ drafted the study; YY and YS recruited the participants and collected the clinical data. ZKZ, HL, and QQL were responsible for statistical analyses and tables. ZKZ, QQL, YY, DYC, and QJ have primary responsibility for the final content. All authors agreed to the submission. The author(s) read and approved the final manuscript.
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All methods were performed in accordance with the Declaration of Helsinki. Approval from the Medical Ethics Committee of Nanjing University Medical Affiliated Drum Tower Hospital was obtained for this study. Informed consent was obtained from all patients to participate in the study.
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Informed consent to publication of research was obtained from all participants in this study.
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Zhuang, Z., Li, Q., Yao, Y. et al. Incidence and risk factors of perioperative deep vein thrombosis in patients undergoing primary hip arthroplasty via the direct anterior approach. J Orthop Surg Res 19, 10 (2024). https://doi.org/10.1186/s13018-023-04443-8
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DOI: https://doi.org/10.1186/s13018-023-04443-8