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Complications due to HIV in patients undergoing total joint arthroplasty: A systematic review and meta-analysis
⁎Corresponding author: Md Ariful Haque. Arifulhaque58@gmail.com
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Received: ,
Accepted: ,
This article was originally published by Reed Elsevier India Pvt. Ltd. and was migrated to Scientific Scholar after the change of Publisher.
Abstract
Abstract
HIV infection in patients undergoing Total joint arthroplasty (TJA) results in adverse postoperative outcomes. However, there are uncertain data regarding the extent of involvement of HIV in TJA and the individual complications associated with it. Therefore, we planned to conduct a systematic review and meta-analysis to assess the risk of HIV in causing complications after TJA.
Electronic databases such as PubMed, Cochrane, and Google Scholar from inception till May 1, 2023. Studies evaluating complications in HIV-infected patients following TJA were selected. Statistical Analysis was performed through Revman.
A total of 16 studies evaluating 17,974,549 patients were included in the meta-analysis. HIV-infected patients were at increased risk of developing infectious complications (OR 1.82 [1.49, 2.22]; p < 0.00001; I2 = 62 %), medical complications (OR 1.85 [1.41, 2.42]; p < 0.00001; I2 = 82.8 %) and surgical complications (OR 1.58 [1.38, 1.82]; p < 0.00001; I2 = 76 %) following TJA. On subgroup analysis, we found that there was an increased risk of infectious (OR 1.67 [1.19, 2.34]; p = 0.003; I2 = 70 %), medical (OR 1.24 [1.03, 1.48]; p = 0.02; I2 = 79 %) and surgical complications (OR 1.35 [1.09, 1.67]; p = 0.007; I2 = 69 %) following Total knee arthroplasty. As well as there was an increased risk of infectious (OR 1.76 [1.26, 2.46]; p = 0.0001; I2 = 0 %), medical (OR 1.54 [1.12, 2.12; p = 0.007; I2 = 85 %), and surgical complications (OR 1.50 [1.22, 1.86]; p = 0.0002; I2 = 0 %) following Total hip arthroplasty.
HIV-infected patients are at an increased risk of complications following TJA. Knowledge regarding these individual complications will result in better monitoring and post-operative care.
Keywords
Total joint arthroplasty
HIV
Human immunodeficiency virus
Complications
1 Introduction
Total Joint Arthroplasty (TJA) has become an increasingly popular surgical approach to attenuate pain in a patient with chronic inflammation of joints.1 With successful pain relief and minimal invasion, total joint arthroplasty is the foremost choice of surgeons nowadays.1 However, the presence of comorbid conditions such as diabetes, obesity, hypertension, and any chronic infection can elevate the risk of post-surgical complications in recipients of TJA.2,3 Among the infectious diseases, HIV stands out to be the most potent contributor to post-surgical complications.2,3
The global prevalence of HIV infection is tremendous. Around 33 % of HIV-infected individuals undergo total joint arthroplasty. Still, unfortunately, a high incidence of post-surgical complications in these patients is a rising concern among surgeons, making them reluctant toward this treatment option.4 The risk of developing complications after joint replacement spikes up to 50 % in HIV patients.2,3 This increasingly rising trend in complications after TJA, particularly in HIV-positive patients is alarming.2,3
Management of post-arthroplasty complications In HIV patients is still a big challenge for the healthcare provider. One possible reason for this failure is that we lack adequate knowledge. Complications mentioned in post-operative guidelines are insufficient and based on contradicting data. A study indicated that post-surgical cerebrovascular illness is a significant complication within 90 days of TJA in HIV-positive patients. Still, findings of another study showed cerebrovascular events to be highly unlikely after TJA in people with HIV infection.1,5 Similarly, studies pointed out that HIV patients show a notably higher number of wound and prosthetic infections after joint replacement surgery.1 Contrary to this, findings of other studies yielded that prosthetic infection is an insignificant post-surgical complication.6
All these variations in the existing literature create ambiguity among physicians in understanding which complications they should be prepared to encounter.7 Therefore, to sort out discrepancies in the existing literature, we thoroughly reviewed and found no study that compiled all possible complications. Thus, we aim to conduct a meta-analysis that statistically analyzes all the post-surgical complications in HIV patients undergoing total joint arthroplasty.
2 Materials and METHODS
2.1 Data sources and search strategy
This Systematic review/Meta-analysis is conducted following Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines. There is no need for ethical approval since it is a systematic review of already published data. An electronic search from PubMed/Medline, Cochrane Library, and Google Scholar was conducted from inception till May 1, 2023 with only English language-based literature using the search string: (HIV OR Human immunodeficiency virus OR AIDS) AND (Total joint OR Total knee OR Total hip OR Total shoulder OR Total ankle OR TJA OR TSA OR TKA OR TAA OR THA OR TJR OR THR OR TKR OR TSR) AND (replace∗ OR arthroplast∗). This systematic review was registered on PROSPERO # CRD42022348094.
2.2 Study selection
All studies were included, which met the following criteria described as PECOS (1) P (Population) Patients who underwent Primary Total Joint Arthroplasty (TJA) surgery8 Exposure: HIV infection/AIDs9 Control: Patients without HIV infection/AIDs (4) Outcome: Post-operative complications after arthroplasty in HIV/AIDs population (5) S (Studies): Retrospective studies, case-control studies, cohort studies and Randomized clinical trials published in English language only. The rest of the articles like case reports, case series, animal studies, editorials, other systematic reviews, and meta-analyses were excluded. Studies not meeting the inclusion criteria were excluded.
2.3 Data extraction and quality assessment of studies
Studies selected were exported to EndNote Reference Library software version x8.2 (Clarivate Analytics) and duplicates were screened and removed. Newcastle-Ottawa Scale (NOS) was used to evaluate the quality of included cohort studies. NOS score <6 was considered a high risk of bias while NOS Score ≥6 is considered a low risk. To decide the appropriate time for follow-up, we considered median follow-up time. The study reporting follow-up time more than the median follow-up was given a (1) Score, and those reporting less follow-up time than the median follow-up were given a (0) score. Publication bias will be assessed through a funnel plot if at least ten studies report any outcome.
2.4 Statistical Analysis
Meta-analysis will be conducted by pooling odds ratios of all studies reporting the impact of AIDs/HIV infection on postoperative complications following total joint arthroplasty. The pooled result will be computed as OR/HR with a 95 % confidence interval using the fixed-effects model. OR/HR with 95%CI will be extracted from multivariate Analysis of original studies only. Data from OR and HR will be analyzed separately since they can't be pooled together. The study heterogeneity will be quantified and assessed using Cochran's Q test and I2 statistics. A random-effects model will be used.
3 RESULTS
3.1 Literature search
The initial literature search yielded 927 articles. After de-duplication, 649 were screened. These articles were screened by reading the title/abstract and 113 articles were selected for full-text screening. At last, 16 articles were included in the meta-analysis5,6,10–23 (Fig. 1).

3.2 Study characteristics
A total of 17,974,549 patients were included in our review. All 16 studies included in our Analysis were retrospective cohort studies. Out of these, THA was evaluated by 11 studies,5,6,11–14,16,18,19,21,22 and TKA was reviewed by 11 studies,5,6,10,11,13–15,19–21,23 TSA was evaluated by two studies6,17 and RTSA 17 was evaluated by 1 study. Different follow-up durations were observed in these studies. Three months follow-up was reported by three studies,5,14,17 1-year follow-up was reported by two studies,11,22 2-year follow-up was reported by six studies,5,6,12,17,21,23 4-year follow-up was reported by 1 study.19 Six studies reported a follow-up till the end of the study period10,13,15,16,18,20 (Table 1) (see Table 2).
| Variable | Study design | Country | Total procedures/patients (n) | HIV patients (n) | HIV diagnosis | Type of arthroplasty | Type of complication | Follow-up | NOS score |
| Tornero et al., 2012 | Retrospective cohort | Spain | 40 | 13 | HIV unit database | THA | Persistent joint pain, septic knee arthritis, osteonecrosis | Minimum 1 Year | 7 |
| Lin et al., 2014 | Retrospective cohort | U. S | 394 | 22 | City-wide clinical database of HIV + patients within the hospital network | THA, TKA | PJI, Revision arthroplasty | Minimum 2 years | 6 |
| Boylan et al., 2015 | Retrospective cohort | U. S | 5,675,086 | 2772 | ICD-9 | TKA | Perioperative Wound infection, osteonecrosis, deep chronic infection, chronic osteomyelitis | Till the end of the study period | 8 |
| Menendez et al., 2015 | Retrospective cohort | U. S | 3,096,791 | N/A | ICD-9 | THA, TKA | Myocardial infarction, | 4 years | 8 |
| Naziri et al., 2015 | Retrospective Cohort | U. S | 2,665,971 | 9275 | ICD-9 | THA | Acute renal failure, pneumonia, wound hemorrhage, osteonecrosis | Till the end of the study period | 8 |
| Bala et al., 2016 | Retrospective cohort | U. S | 145,761 | 2528 | ICD-9, CPT | TSA, RTSA | Acute renal failure, Anemia, MI, DVT, Sepsis, Respiratory failure, Heart failure, Stroke/CVA, Pneumonia, broken prosthetic joints, Dislocations of joints, Periprosthetic infections, revision and repair, Closed proximal humerus fractures | Surgical: Minimum 2 YearsMedical: 3 months | 6 |
| Mahure et al., 2017 | Retrospective cohort | U. S | 80,722 | 534 | ICD-9 | THA | DVT, Hematoma/seroma, Peripheral vascular complications, Postoperative Delirium, Pulmonary complications | Till the end of the study period | 8 |
| Salt et al., 2017 | Retrospective cohort | U. S | 2212 | 9 | ICD-9 | THA, TKA, TSA | Post-operative infection | 2 years | 8 |
| Kildow et al., 2018 | Retrospective cohort | U. S | 22,663 | 1517 | ICD-9, CPT | THA, TKA | DVT, Transfusion, Joint loosening, periprosthetic fracture and revision arthroplasty, PJI And I&D | Medical: 3 monthsSugicial:2 years | 6 |
| Mistry et al., 2018 | Retrospective cohort | U. S | 3,108,057 | N/A | ICD-9 | TKA | Allogenic transfusion | Till the end of the study period | 8 |
| Edmiston et al., 2019 | Retrospective cohort | U. S | 498,681 | 49,868 | ICD-9, CPT | THA, TKA | Surgical site infections, revision surgery, | 3 months | 8 |
| Chen et al., 2021 | Retrospective cohort | U. S | 1,821,752 | N/A | ICD-9 | THA, TKA | Heparin-induced thrombocytopenia | Till the end of the study period | 8 |
| Ngwasi et al., 2021 | Retrospective cohort | South Africa | 290 | 180 | Patient notes | THA | Periprosthetic joint infection, Venous thromboembolism, Reoperation | Minimum 2 years | 8 |
| Olson et al., 2022 | Retrospective cohort | U. S | 350 | 110 | Coding data from three tertiary referral academic institution | THA, TKA | Venous thromboembolism | Minimum 1 year | 6 |
| Sakthivelnathan et al., 2022 | Retrospective cohort | U. S | 406 | 203 | ICD-10 | TKA | Acute renal failure, Blood loss anemia, PE, DVT, Pneumonia, Periprosthetic fracture, Periprosthetic dislocations, mechanical complications, Wound dehiscence, Blood transfusions | Till the end of the study period | 6 |
| Elzomor et al., 2022 | Retrospective Cohort | U. S | 855, 373 | 1606 | ICD-9, ICD-10 | TKA | Revision, PJI, Loosening, Movement under anesthesia, SSI, renal failure, anemia, arrhythmia, bleeding, blood transfusion, pneumonia, stroke, death, venous thromboembolism, respiratory complication, sepsis | 2 years | 8 |
| COMPLICATIONS | NO. OF STUDIES | ODDS RATIO [95 % CONFIDENCE INTERVAL] | P-VALUE | HETEROGENEITY |
| INFECTIOUS COMPLICATIONS | ||||
| Prosthetic joint infection | 7 [5, 6, 10, 12, 17, 21, 23] | 1.79 [1.35, 2.36] | p < 0.00001 | 36 % |
| Wound infections | 4 [14, 18, 20, 23] | 1.91 [1.14, 3.19] | p = 0.01 | 71 % |
| Sepsis/SIRS | 3 [5, 17, 23] | 1.75 [0.84, 3.67] | p = 0.14 | 85 % |
| Urinary tract infections | 1 17 | 2.01 [1.70, 2.38] | p < 0.00001 | N/A |
| Overall | 10 [5, 6, 10, 12, 14, 17, 18, 20, 21, 23] | 1.82 [1.49, 2.22] | p < 0.00001 | 62 % |
| MEDICAL COMPLICATIONS | ||||
| Blood transfusion | 7 [5, 10, 15–17, 22, 23] | 1.61 [1.18, 2.20] | p = 0.003 | 87 % |
| Venous thromboembolism | 6 [5, 10–12, 17, 23] | 1.37 [1.02, 1.84] | p = 0.03 | 60 % |
| Acute renal disease | 5 [5, 10, 17, 18, 23] | 1.68 [1.22, 2.31] | p = 0.001 | 73 % |
| Pneumonia | 5 [5, 10, 17, 18, 23] | 1.59 [1.11, 2.28] | p = 0.01 | 71 % |
| Myocardial infarction | 3 [5, 17, 19] | 2.56 [0.91, 7.21] | p = 0.08 | 94 % |
| Stroke/CVA | 2 [5, 17] | 7.16 [0.19, 265.26] | p = 0.29 | 99 % |
| Anemia | 3 [10, 17, 23] | 1.24 [0.79, 1.97] | p = 0.35 | 94 % |
| Respiratory failure | 1 17 | 3.20 [2.20, 4.66] | p < 0.00001 | N/A |
| Heart failure | 2 [17, 23] | 1.49 [0.58, 3.84] | p = 0.41 | 97 % |
| Arrhythmias | 2 [17, 23] | 1.30 [0.52, 3.23] | p = 0.57 | 98 % |
| Heparin-induced thrombocytopenia | 1 13 | 5.86 [1.27, 27.04] | p = 0.02 | N/A |
| Delirium | 1 16 | 2.91 [2.67, 3.17] | p < 0.00001 | N/A |
| Unspecified medical complications | 1 20 | 1.13 [0.73, 1.75] | p = 0.58 | N/A |
| Overall | 13 [5, 10–13, 15–20, 22, 23] | 1.85 [1.41, 2.42] | p < 0.00001 | 82.8 % |
| SURGICAL COMPLICATIONS | ||||
| Revision surgery | 4 [5, 17, 21, 23] | 1.95 [0.89, 4.26] | P = 0.09 | 91 % |
| Periprosthetic fractures | 3 [5, 10, 17] | 1.95 [1.40, 2.72] | p < 0.0001 | 0 % |
| Mechanical complications | 3 [5, 10, 17] | 1.44 [0.82, 2.53] | p = 0.21 | 87 % |
| Joint dislocations | 2 [10, 17] | 1.58 [1.19, 2.09] | p = 0.002 | 0 % |
| Prosthetic loosening | 2 [5, 23] | 1.04 [0.71,1.55] | P = 0.83 | 0 % |
| Joint instability | 2 [5, 17] | 1.07 [0.76, 1.51] | p = 0.70 | 0 % |
| Manipulation under anesthesia | 3 [5, 17, 23] | 1.43 [1.06, 1.94] | p = 0.02 | 56 % |
| Post-operative bleeding | 2 [17, 18] | 1.88 [1.42, 2.49] | p < 0.0001 | 3 % |
| Joint stiffness | 2 [5, 17] | 1.17 [1.02, 1.35] | p = 0.03 | 66 % |
| Incision & drainage | 2 [5, 17] | 1.63 [1.34, 1.98] | p < 0.00001 | 59 % |
| Wound dehiscence | 1 10 | 1.00 [0.06, 16.13] | p = 1.00 | N/A |
| Cellulitis/Seroma | 1 17 | 4.12 [2.35, 7.22] | p < 0.00001 | N/A |
| Joint pain | 1 17 | 1.82 [1.63, 2.03] | p < 0.00001 | N/A |
| Reoperation | 1 12 | 1.22 [0.11, 13.53] | P = 0.87 | N/A |
| Unspecified surgical complications | 1 20 | 1.50 [0.80, 2.81] | p = 0.21 | N/A |
| Overall | 8 [5, 10, 12, 17, 18, 20, 21, 23] | 1.58 [1.38, 1.82] | p < 0.00001 | 76 % |
| GENERAL COMPLICATIONS | ||||
| Readmission | 1 16 | 2.52 [2.09, 3.04] | p < 0.00001 | N/A |
| Extended length of stay | 1 16 | 1.88 [1.51, 2.34] | p < 0.00001 | N/A |
| Overall | 1 16 | 2.19 [1.64, 2.92] | p < 0.00001 | 74.8 % |
3.3 Quality assessment and publication bias
The quality of individual studies was determined through the NOS scale. All studies have a low risk of bias (median = 8) (Table 1). There was no publication bias since the funnel plot appeared symmetrical on visual inspection (Fig. 2).

3.4 Complications due to HIV in patients undergoing TJA
3.4.1 Infectious COMPLICATIONS
Infectious complications were reported in 10 studies.5,6,10,12,14,17,18,20,21,23 Overall HIV infected patients were at significant risk of developing infectious complications (OR 1.82 [1.49, 2.22]; p < 0.00001; I2 = 62 %.
The relationship between HIV infection and individual infectious complications was also evaluated. Prosthetic joint infection (PJI) was reported in 7 studies.5,6,10,12,17,21,23 HIV-infected patients undergoing TJA were at significant risk of developing PJI (OR 1.79 [1.35, 2.36]; p < 0.00001; I2 = 36 %). Wound infection was reported in 4 studies14,18,20,23 and was a significant complication in HIV-infected patients (OR 1.91 [1.14, 3.19]; p = 0.01; I2 = 71 %). Sepsis/Systemic inflammatory response syndrome (SIRS) was reported by three studies5,17,23 and was an insignificant complication in HIV-infected patients (OR 1.75 [0.84, 3.67]; p = 0.14; I2 = 85 %). Similarly, urinary tract infection was reported by 1 study17 and was also a significant complication of HIV following TJA (OR 2.01 [1.70, 2.38]; p < 0.00001) (Table 3).
| COMPLICATIONS | NO. OF STUDIES | OR [95 % Confidence Interval] | p-value |
| TKA | |||
| Infectious Complications | 6 [5, 10, 14, 20, 21, 23] | 1.67 [1.19, 2.34] | P = 0.003 |
| Medical Complications | 6 [5, 10, 13, 15, 20, 23] | 1.24 [1.03, 1.48] | p = 0.02 |
| Surgical Complications | 5 [5, 10, 20, 21, 23] | 1.35 [1.09, 1.67] | p = 0.007 |
| THA | |||
| Infectious Complications | 3 [5, 18, 21] | 1.76 [1.26, 2.46] | p = 0.001 |
| Medical Complications | 6 [5, 11, 12, 16, 18, 22] | 1.54 [1.12, 2.12] | p = 0.001 |
| Surgical Complications | 4 [5, 12, 18, 21] | 1.50 [1.22, 1.86] | p = 0.0002 |
| General Complications | 1 16 | 2.19 [1.64, 2.92] | p < 0.00001 |
3.4.2 Medical COMPLICATIONS
Medical complications due to HIV following TJA were reported by 13 studies.5,10–13,15–20,22,23 Overall HIV infected patients were at a significantly higher risk of developing medical complications after TJA (OR 1.85 [1.41, 2.42]; p < 0.00001; I2 = 82.8 %).
The risk of individual medical complications following TJA was also assessed. Seven studies5,10,15–17,22,23 reported a significant relationship between HIV infection and post-operative blood transfusion (OR 1.61 [1.18, 2.20]; p = 0.003; I2 = 87 %). 6 studies5,10–12,17,23 reported a significant risk of venous thromboembolism due to HIV following TJA (OR 1.37 [1.02, 1.84]; p = 0.03; I2 = 60 %). 5 studies5,10,17,18,23 reported significant risk of HIV in causing acute renal disease (OR 1.68 [1.22, 2.31]; p = 0.001; I2 = 73 %). Five studies5,10,17,18,23 reported a significant impact of HIV in causing pneumonia after TJA (OR 1.59 [1.11, 2.28]; p = 0.01; I2 = 71 %). Three studies5,17,19 reported a non-significant association between HIV and myocardial infarction following TJA (OR 2.56 [0.91, 7.21]; p = 0.08; I2 = 94 %). 2 studies5,17 found that HIV infection is not a significant risk factor for causing stroke/cerebrovascular accidents (OR 7.16 [0.19, 265.26]; p = 0.29; I2 = 99 %). Three studies5,10,23 reported an insignificant relationship between HIV infection and anemia (OR 1.24 [0.79, 1.97]; p = 0.35; I2 = 94 %). 1 study reported respiratory failure as a complication following TJA (OR 3.20 [2.20, 4.66]: p < 0.00001).17 2 study reported heart failure as a complication following TJA (OR 1.49 [0.58, 3.84]; p = 0.41; I2 = 97 %).17 2 study17,23 reported arrhythmias which was not a significant complication following TJA (OR 1.30 [0.52, 3.23]; p = 0.57; I2 = 98 %). 1 study13 explored the relationship between HIV and the development of heparin-induced thrombocytopenia (OR 5.86 [1.27, 27.04]; p = 0.02). 1 study16 discovered the adverse impact of HIV on the development of delirium (OR 2.91 [2.67, 3.17]; p < 0.00001). 1 study20 reported unspecified medical complications following TJA (OR 1.13 [0.73, 1.75]; p < 0.00001).
3.4.3 SURGICAL COMPLICATIONS
Surgical complications due to HIV following TJA were reported by eight studies.5,10,12,17,18,20,21,23 Overall HIV patients were at a significantly higher risk of developing surgical complications following TJA (OR 1.58 [1.38, 1.82]; p < 0.00001; I2 = 76 %).
The risk of individual surgical complications was also studied. Four studies5,17,21,23 evaluated the risk of revision surgery in HIV patients following TJA, and it was found to be insignificant (OR 2.95 [0.89, 4.26]; p = 0.09; I2 = 91 %). Three studies5,10,17 found that there was an increased risk of peri-prosthetic fractures if an HIV-infected patient underwent TJA (OR 1.95 [1.40, 2.72]; p < 0.0001; I2 = 0 %). Three studies5,10,17 reported that HIV is a significant risk factor for mechanical complications (OR 1.85 [1.56, 2.21]; p < 0.00001; I2 = 87 %). 2 studies10,17 described joint dislocations as a complication due to pre-operative HIV infection (OR 1.58 [1.19, 2.09]; p = 0.002; I2 = 0 %). 2 studies5,17 showed that HIV infection is not a significant risk factor for joint instability following TJA (OR 1.07 [0.76, 1.51]; p = 0.70; I2 = 0 %). Three studies5,17,23 reported a significant risk of HIV patients undergoing post-operative manipulation under anesthesia (OR 1.43 [1.06, 1.94]; p = 0.02; I2 = 56 %). 2 studies17,18 reported a significant risk of postoperative bleeding in HIV infected patients undergoing TJA (OR 1.88 [1.42, 2.49]; p < 0.0001; I2 = 3 %). 2 studies5,17 reported that HIV infected patients were at significant risk for undergoing incision and drainage following TJA (OR 1.63 [1.34, 1.98]; p < 0.00001; I2 = 59 %). 2 studies5,17 showed that HIV infected patients were at significantly increased risk for developing joint stiffness after TJA (OR 1.17 [1.02, 1.35]; I2 = 66 %; p = 0.03). 1 study10 reported that HIV patients were not at significant risk for wound dehiscence following TJA (OR 1.00 [0.06, 16.13]; p = 1.00). 1 study10 reported cellulitis/seroma as a significant complication following TJA (OR 4.12 [2.35, 7.22]; p < 0.00001). 1 study17 reported HIV infection as a significant risk factor for post-operative joint pain (OR 1.82 [1.63, 2.03]; p < 0.00001). 1 study12 reported that HIV does not increase the risk of reoperation following TJA (OR 1.22 [0.11, 13.53]; p = 0.87), and 1 study20 reported the risk of unspecified surgical complications following TJA (OR 1.50 [0.80, 2.81]); p = 0.21). Prosthetic loosening was reported by two studies,5,23 and it was an insignificant complication following TJA (OR 1.04 [0.71, 1.55]; p = 0.83; I2 = 0 %).
3.4.4 General COMPLICATIONS
General complications following TJA were reported by 1 study16 (OR 2.19 [1.64, 2.92]; p < 0.00001; I2 = 74.8 %).
Individual general complications include readmission and extended length of stay following TJA. 1 study16 reported HIV infection as a significant risk for readmission following TJA (OR 2.52 [2.09, 3.04]; p < 0.00001). Similarly, 1 study16 reported HIV infection as a significant risk for an extended length of stay (OR 1.88 [1.51, 2.34]; p < 0.00001).
3.5 Subgroup analysis based on arthroplasty type
We performed subgroup analysis based on the type of arthroplasty. Complications due to HIV were assessed in THA and TKA. Since there was only one study on TSA we could not perform separate subgroup analyses.
3.5.1 TKA
Infectious complications were reported in 6 studies.5,10,14,20,21,23 Patients were at significantly higher risk of infectious complications following TKA (OR 1.67 [1.19, 2.34]; p = 0.003; I2 = 70 %). Medical complications were reported in 6 studies5,10,15,23 and were significantly associated with HIV-infected patients undergoing TKA (OR 1.24 [1.03, 1.48]; p = 0.02; I2 = 79 %). Surgical complications were reported in 5 studies5,10,20,21,23 and were significantly associated with HIV-infected patients undergoing TKA (OR 1.35 [1.09, 1.67]; p = 0.007; I2 = 69 %).
3.5.2 THA
Infectious complications were reported in 3 studies.5,18,21 Patients were at significantly higher risk of infectious complications following THA (OR 1.76 [1.26, 2.46]; p = 0.0001; I2 = 0 %). Medical complications were reported in 6 studies5,11,12,16,18,22 and were significantly associated with HIV-infected patients undergoing THA (OR 1.54 [1.12, 2.12; p = 0.007; I2 = 85 %). Surgical complications were reported in 4 studies5,12,18,21 and were significantly associated with HIV-infected patients undergoing THA (OR 1.50 [1.22, 1.86]; p = 0.0002; I2 = 0 %). General complications were reported by 1 study16 and were significantly associated with HIV-infected patients following THA (OR 2.23 [1.93, 2.57]; p < 0.00001; I2 = 75 %).
4 Discussion
A total of 19 studies analyzed in this systematic review and meta-analysis showed that pre-operative HIV infection is significantly related to an increased number of complications after TJA.5,6,10–23 The principal findings were that patients with HIV undergoing TJA are prone to develop infectious complications, including prosthetic joint infection, wound infection, sepsis, and UTIs [ 5,6, 10, 12, 14, 17,18, 20,21, 23]. There was a significant risk of developing medical complications such as the need for post-operative blood transfusion, venous thromboembolism, pneumonia, anemia, delirium, arrhythmia, heparin-induced thrombocytopenia, and acute renal, respiratory, and heart failure.5,10–13,15–20,22,23
Our study also yielded that HIV-infected patients present a significant risk of surgical complications, including revision surgery, bleeding, joint stiffness, dislocation, pain, mechanical issues, cellulitis, manipulation under anesthesia, post-operative bleeding, incision & drainage, and periprosthetic fractures. Readmission and increased length of stay were also significantly experienced in HIV-infected patients.
HIV-infected patients are subjected to several complications after TJA. Periprosthetic joint infection (PJI) and wound infection are one of the significant threatening complications responsible for increased mortality rates and revision surgeries.25 According to our study, HIV-infected TJA patients are at twice the risk of developing PJI and more than twice the risk of wound infection. A possible reason for this could be the increased rate of infections in HIV patients due to weakened immune systems.24 A decrease in the count of CD4+ T cells is directly related to the incidence of peri-prosthetic joint infection.25 As highlighted by Parvizi et al., 62.5 % of patients with a pre-operative CD4 count of less than 0.2 x109/L3 experienced post-operative prosthetic joint and wound infections.25
Aside from this, we also found a significantly increased number of transfusion rates in HIV patients undergoing TJA. Since such patients' reduced bone marrow function can result in clinically severe cytopenias, they require additional hematological support to get through the surgery.26 This finding was in contradiction with Chowdary et al., which reported a lower rate of blood transfusion in HIV positive cohort.27 Despite this, anemia was still significant in HIV-infected patients, seen in nearly 40 % of patients.27,28 This supports the finding of our study in which anemia was also a significant complication in HIV-infected patients after total joint arthroplasty.
We also found that HIV-positive patients appeared to be more susceptible to venous thromboembolism. It has been shown that the combination of maximum flexion with either internal or external rotation causes femoral vein obstruction, which makes total hip arthroplasty (THA) mechanically pro-thrombotic.29 Increasing viral load and decreasing CD4 count in HIV patients predisposes them to hypercoagulable state.30,31 As the disease progresses and the immune gets depressed, it results in an imbalance between pro and anti-coagulants.30,31 Therefore, HIV infection accounts for a significant independent risk factor of post-TJA venous thromboembolism with odds of 1.37.
Similarly, there was a marked increase in mechanical complications among HIV-positive patients following TJA. According to Labek et al., there was a 12 % rate of significant complications in HIV patients requiring revision surgery.32 These patients show increased avascular necrosis and opportunistic infection due to reduced CD4 count.32 This greatly contributes to exaggerated post-operative complications, requiring extended hospital stays and revision surgeries.32,33
Taking proper pre-operative measures can reduce these complications. Smoking, obesity, anemia, rheumatoid arthritis, diabetes mellitus, and malnutrition are all modifiable risk factors that could be evaluated and managed pre-operatively.34 Cemented stem fixation is one of the most effective prophylactic strategies for periprosthetic femur fractures.29 Venous Thromboembolism can be assessed and safely managed by using prophylactic agents like aspirin for low-risk patients and enoxaparin or warfarin for higher-risk patients.29 After the emergence of effective pharmacological medications, such as antiretroviral therapy (HAART), HIV has evolved into a treatable and controllable illness. Recent studies show that antiretroviral therapy given pre-operatively reduces the risk of complications post-operatively in these patients.27,28
Earlier studies and reviews qualitatively addressed post-operative complications among HIV patients undergoing TJA. We are the first to quantify these complications instead of describing them generically.24,27,28,30 Also, we are the only study to analyze these complications further based on the type of arthroplasty. However, our study has some limitations. Firstly, the data we used for this meta-analysis were taken from retrospective studies. Secondly, the sample size in some studies we used was small, considering the low prevalence of HIV in those areas. Thirdly, due to the unavailability of data, we couldn't study the variations in the result due to the diagnostic techniques, the duration of follow-up, and the stage of the disease. Finally, it's possible that some of the patients in our research were already taking antiretroviral therapy, so we could not distinguish them independently.
5 Conclusion
This in-depth review and meta-analysis of the existing evidence revealed that in total joint arthroplasty, HIV is highly associated with an increased rate of mechanical, surgical, and infectious complications as compared to non-HIV patients. These results can aid surgeons in managing the patients more effectively for the potential risk factors.
CRediT authorship contribution statement
Ramish Sumbal: Conceptualization, Supervision, Writing – original draft, Writing – review & editing. Saad Ashraf: Writing – original draft, Writing – review & editing. Anusha Sumbal: Supervision, Writing – original draft, Writing – review & editing. Uooja Devi: Project administration, Conceptualization, Writing – original draft, Writing – review & editing. Md Ariful Haque: Project administration, Writing – review & editing.
Patient consent statement
No patients were included.
Ethics approval statement
This type of article doesn't need any ethical approval.
Funding statement
Authors have not received any funds.
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