Undergoing Knee Replacement Research Articles

Effect of suture closure and staple closure on postoperative wound complications in patients undergoing knee replacement surgery: A meta-analysis.

The purpose of this meta-analysis is to determine if the application of stitching in the closed area of the knee arthroplasty remains significantly superior to that of the staples. Data sources: EMBASE, Cochrane Libraryand, publications, and the Web of Science. Patients were treated with staples for closure of their wounds, or with conventional stitches for closure of wounds. The main findings were surgical site infection, wound dehiscence, and cutting time. The secondary results were the time to completion, the duration of the hospitalization, and the time to discharge. We incorporated the SIX trial into the meta-analyses with Review Manager V.5.3. The hazard ratio was computed as a therapeutic outcome with respect to the heterogeneity. For more than 50% of heterogeneous samples, we employed a stochastic effect model. The results showed that there was no significant difference in the degree of infection, the degree of dehiscence, the length of the cut and the degree of satisfaction of the wound. But the time to close the wound and the time to operate were significantly different. The time needed to close the wound was shorter than that of the suture (OR, -227. 22; 95% CI, -238. 74, -215. 69 p < 0. 0001); The time taken to replace the knee was also significantly lower among those who had been stapled sutures (OR, -5.46; 95% CI, -10. 43, -0.49 p = 0. 03). Wound closing materials are an afterthought for many orthopaedic surgeons. Together, the findings from a number of comparative studies indicate that the selection of wound closure materials might affect the outcome of the surgery. The evidence, however, is weak because of the heterogeneous approach adopted in earlier research. This study program is intended to provide guidance on how to select the best wound closure material for the purpose of identifying if there is any difference in the incidence of injuries among traditional stitches and staples.

Use of non-surgical treatments on the journey to knee replacement in patients with knee osteoarthritis: a 10-year population-based case–control study

AimTo investigate temporal trends in primary care visits, physiotherapy visits, dispensed non-steroidal anti-inflammatory drugs (NSAIDs) and opioids in knee osteoarthritis (OA) patients who have and have not undergone knee replacement.MethodsWe...

ROLE OF THE WOMAC SCORES IN PREOPERATIVE DECISION-MAKING AND ANALYSIS OF KNEE REPLACEMENT FOR KNEE OSTEOARTHRITIS PATIENTS

Objective: Knee replacement (KR) is a widely accepted procedure for end-stage knee arthritis. Patients’ subjective perception of knee joint symptoms is an important factor in their decision to undergo knee replacement. This paper mainly studies the correlation between knee joint symptoms and knee replacement, aimed to establish the corresponding preoperative decision-making model. Methods: 122 knee arthritis patients were included from the knee arthritis database FNIH OAI, of which 61 had knee arthroplasty and 61 without knee arthroplasty. First, WOMAC score was used to quantitatively evaluate the knee joint symptoms of patients; then the correlation between clinical risk factors, single WOMAC score and knee replacement was analyzed. Then K-means cluster analysis was used to divide the multidimensional WOMAC score into different groups of knee arthritis symptoms’ severity. Finally, based on the retained clinical risk factors and WOMAC cluster variables, the clinical models, WOMAC scoring model and clinical +WOMAC scoring model were constructed, respectively, and compared. Results: Age and BMI were significant risk factors for knee replacement ([Formula: see text]), which could be used to construct the clinical model. There was no significant correlation between any single WOMAC score and knee replacement ([Formula: see text]). The cluster variable of WOMAC score obtained by cluster analysis was significantly correlated with knee replacement ([Formula: see text]). Based on the above risk factors, we established the Age+BMI, Cluster and Age+BMI+Cluster models, respectively. The comparison results showed that the Age+BMI+Cluster model ([Formula: see text]) showed the highest predictive value for knee replacement, and the corresponding nomogram also showed good predictive consistency; the performance of Cluster model ([Formula: see text]) was the second. The pure clinical risk factor model Age+BMI showed the worst predictive performance ([Formula: see text]). Conclusion: This paper analyzed the correlation between patients’ subjective perception of knee arthritis symptoms and the final knee replacement, and constructed a new biomarker based on the WOMAC score. After analysis and modeling, this marker could be used to predict knee replacement. The constructed Age+BMI+Cluster nomogram could be used for personalized assessment of the risk of knee replacement.

Challenges in rehabilitation and continuum of care provision after knee replacement: a mixed-methods study from a low- and middle-income country

Purpose Continuum-of-care is crucial following knee replacement. This is an understudied area in the context of low- and middle-income countries. We report findings of a mixed-methods study conducted to understand patient’s postoperative experiences in following unsupervised home-based physiotherapy protocols and healthcare provider’s experiences in providing rehabilitation care. Methods Consecutive adults (n = 79) scheduled or had undergone knee replacement, attending an urban tertiary care hospital in India completed a 22-item questionnaire to gauge attitude towards physical rehabilitation. We conducted in-depth interviews with nine patients, ten physiotherapists, and three surgeons using a phenomenology approach. Data were interpreted using the capability, opportunity, and motivation-behaviour (COM-B) framework. Results Patients were motivated to do exercises and valued family support during the recovery period. However, they desired physiotherapy support, especially during the early recovery period due to post-operative pain. Healthcare providers reported poor adherence with the exercise regimen and desired a mechanism to monitor patient progress after discharge. Patients and health care providers identified accessibility to rehabilitation centre as a major barrier in availing affordable and reliable physiotherapy services. Conclusion There is a need for a continuum of care to improve patient experience during recovery and for health care providers to monitor progress and provide personalised progressive exercise therapy.

A Study of Physical Resilience and Aging (SPRING): Conceptual framework, rationale, and study design.

Understanding the physiological basis of physical resilience to clinical stressors is crucial for the well-being of older adults. This article presents a novel framework to discover the biological underpinnings of physical resilience in older adults as part of the "Characterizing Resiliencies to Physical Stressors in Older Adults: A Dynamical Physiological Systems Approach" study, also known as The Study of Physical Resilience and Aging (SPRING). Physical resilience, defined as the capacity of a person to withstand clinical stressors and quickly recover or improve upon a baseline functional level, is examined in adults aged 55 years and older by studying the dynamics of stress response systems. The hypothesis is that well-regulated stress response systems promote physical resilience. The study employs dynamic stimulation tests to assess energy metabolism, the hypothalamic-pituitary-adrenal axis, the autonomic nervous system, and the innate immune system. Baseline characteristics influencing resilience outcomes are identified through deep phenotyping of physical and cognitive function, as well as of biological, environmental, and psychosocial characteristics. SPRING aims to study participants undergoing knee replacement surgery (n = 100), bone and marrow transplantation (n = 100), or anticipating dialysis initiation (n = 60). Phenotypic and functional measures are collected pre-stressor and at multiple times after stressor for up to 12 months to examine resilience trajectories. By improving our understanding of physical resilience in older adults, SPRING has the potential to enhance resilient outcomes to major clinical stressors. The article provides an overview of the study's background, rationale, design, pilot phase, implementation, and implications for improving the health and well-being of older adults.

Spatial distribution of elements during osteoarthritis disease progression using synchrotron X-ray fluorescence microscopy

The osteochondral interface is a thin layer that connects hyaline cartilage to subchondral bone. Subcellular elemental distribution can be visualised using synchrotron X-ray fluorescence microscopy (SR-XFM) (1 μm). This study aims to determine the relationship between elemental distribution and osteoarthritis (OA) progression based on disease severity. Using modified Mankin scores, we collected tibia plates from 9 knee OA patients who underwent knee replacement surgery and graded them as intact cartilage (non-OA) or degraded cartilage (OA). We used a tape-assisted system with a silicon nitride sandwich structure to collect fresh-frozen osteochondral sections, and changes in the osteochondral unit were defined using quantified SR-XFM elemental mapping at the Australian synchrotron's XFM beamline. Non-OA osteochondral samples were found to have significantly different zinc (Zn) and calcium (Ca) compositions than OA samples. The tidemark separating noncalcified and calcified cartilage was rich in zinc. Zn levels in OA samples were lower than in non-OA samples (P = 0.0072). In OA samples, the tidemark had less Ca than the calcified cartilage zone and subchondral bone plate (P < 0.0001). The Zn–strontium (Sr) colocalisation index was higher in OA samples than in non-OA samples. The lead, potassium, phosphate, sulphur, and chloride distributions were not significantly different (P > 0.05). In conclusion, SR-XFM analysis revealed spatial elemental distribution at the subcellular level during OA development.

Study on the effect of internet plus continuous nursing on functional recovery and medication compliance of patients with knee joint replacement

ObjectiveTo evaluate the effect of "Internet + " continuity of care on postoperative functional recovery and medication compliance in patients with knee arthroplasty.MethodsIn this retrospective study, 100 patients who underwent knee replacement in our hospital between January 2021 and December 2022 were recruited and assigned to receive routine care (routine group) or "Internet + " continuity of care (continuity group), with 50 patients in each group. Outcome measures included knee function, sleep quality, emotional state, medication compliance, and self-care ability.ResultsPatients in the continuity group showed better knee function after discharge and during follow-up versus those in the routine group (P < 0.05). Continuity care resulted in significantly lower Pittsburgh Sleep Quality Index (PSQI), Self-Rating Anxiety Scale (SAS), and Self-Rating Depression Scale (SDS) scores versus routine care (P < 0.05). Patients in the continuity group showed higher treatment compliance, ability of daily living (ADL) scores, and nursing satisfaction than those in the routine group (P < 0.05).ConclusionThe "Internet + " continuity of care is highly feasible and can effectively promote the postoperative functional recovery of knee replacement patients, improve patients' medication compliance, sleep quality, and self-care ability, mitigate negative emotions, and provide enhanced home care.

Functional outcomes following knee replacement in community-dwelling older adults

BackgroundKnee replacements are increasingly performed in older adults but uncertainty remains regarding their benefits in the context of age-related decline in physical function and other comorbidities. This study aimed to examine (1) the effect of knee replacement on functional outcomes in the context of age-related decline in physical function and (2) the factors associated with minimal important improvement in physical function after knee replacement in community-dwelling older adults aged ≥ 70 years.MethodsThis cohort study was performed within the ASPREE trial, with 889 participants undergoing knee replacement during the trial and 858 age- and sex-matched controls without knee or hip replacement identified from 16,703 Australian participants aged ≥ 70 years. Health-related quality of life was assessed annually using the SF-12, including its physical and mental component summary (PCS and MCS). Gait speed was measured biennially. Multiple linear regression and analysis of covariance were used to adjust for potential confounders.ResultsParticipants with knee replacement had significantly lower pre- and post-replacement PCS scores and gait speed compared with age- and sex-matched controls. Participants with knee replacement had significant improvement in PCS score following knee replacement (mean change 3.6, 95% CI 2.9–4.3) while PCS score remaining unchanged in age- and sex-matched controls (-0.02, 95% CI -0.6 to 0.6) during follow-up period. The greatest improvements were observed for bodily pain and physical function. Following knee replacement, 53% of participants experienced minimal important improvement in PCS score (increased by ≥ 2.7), while 24% experienced worsened PCS score (reduced by > 2.7). Participants experiencing improved PCS score postoperatively had significantly lower PCS and higher MCS scores pre-surgery.ConclusionsAlthough community-based older adults experienced a significant improvement in PCS scores after knee replacement, their postoperative physical functional status remained significantly lower than age- and sex-matched controls. The degree of preoperative physical function impairment was a strong predictor of functional improvement, suggesting that this could be an important consideration when identifying older people most likely to benefit from knee replacement surgery.

Mental toughness and osteoarthritis: Postsurgery improvement in knee pain/functionality in older adults.

To investigate longitudinally the role of mental toughness (MT) in knee rehabilitation in terms of perceived pain and functionality in a sample of older adults with arthritis who adhered to their postsurgery clinic-based rehabilitation protocols and provide suggestions to rehabilitation psychologists. To strengthen the internal validity of this study, we designed our methods and implementation in a way to minimize bias by utilizing the National Institute of Health Quality Assessment Tool for Before-After (Pre-Post) Studies With No Control Group. The data were collected from 92 older-adult patients, who had a diagnosis of osteoarthritis and underwent knee surgery. All patients were diagnosed, underwent surgery, and were evaluated by the same physician. We administered the Oxford Knee Score (OKS) to measure rehabilitation outcomes in terms of pain and functionality and the MT Index (MTI) to measure MT levels three times: 1 day before and 1 and 6 months after the surgery. We used a multilevel growth model to examine the change in the OKS across administrations using MTI scores as a time-varying covariate and sex, age at surgery, and knee as time-invariant covariates. About 62% of the variability in OKS was due to between-patient differences. Of the variability that was attributable to differences within-patient across time, MT accounted for about 38% of the variability. MT could be another, positive psychology-based tool rehabilitation psychologists use to contribute to health promotion efforts to reduce the incidence of disability of older adults with osteoarthritis who undergo knee replacement surgery. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Primary Total Knee Replacement: A Recipe for Dry Dressing.

To evaluate surgical outcomes using sets of techniques to achieve single dry dressing for two weeks post total knee replacement (TKR) at Dr. Sulaiman Al-Habib Hospital, Riyadh, Saudi Arabia. A prospective study comprised of 110 consecutive unilateral total knee replacements was conducted at the orthopedic department of Dr. Sulaiman Al-Habib Hospital, Suwaidi, Riyadh, KSA. Patients of both genders underwent knee replacement surgery due to primary knee osteoarthritis, Kellgren-Lawrence grades 3 and 4. Routine investigations and fitness evaluations of patients were carried out preoperatively. Preoperative minimal use of a tourniquet and release prior to arthrotomy closure; intravenous tranexamic acid, no drains; capsule infiltration with local anesthetics without adrenaline; tight closure with barbed sutures up to the skin in three layers; skin glue; Aquacel dressing; adductor canal block; and continuation of oral anticoagulant for four weeks. A total of 110 cases were included, of which 81 (73.6%) were females and 29 (26.4%) were males. The mean age of the study population was 60.5+10.3 years (48 to 88 years). The mean BMI in our patients was 30.57+10.5 kg/m2. Most patients were morbidly obese 13 (30.95%). The mean preoperative Hb% was 13.07+1.6 g/dl, while the mean postoperative Hb% was 12.58+1.9 mg/dl with a p-value of 0.28, which was non-significant statistically. Only two patients needed a change of Aquacel wound dressing for ooze. None of our patients developed deep venous thrombosis (DVT) or an infection. A sequential use of sets of techniques is observed to be associated with improved outcomes in terms of blood loss, wound infection, mobility, and patient satisfaction, leading to the ultimate end point of dry Aquacel wound dressing.

Clinical outcomes and survival comparison between NexGen all-poly and its metal-backed equivalent in total knee arthroplasty

PurposeThis study aims to compare total knee replacement (TKA) with NexGen All-Poly (APT) and NexGen Metal-Backed (MBT) in terms of implant survivorship, reasons leading to implant failure and functional results of defined age categories.MethodsA single-centre, retrospective evaluation of 812 patients who underwent knee replacement with NexGen CR between 2005 and 2021, comparing a modern congruent APT component to a modular MBT equivalent component using a similar surgical technique at a notable mean follow-up duration. Implant survival, functional outcomes using the Knee Society Score and range of motion were evaluated and compared in different age categories.ResultsOf the 812 NexGen CR TKAs performed at our institution, 410 (50.4%) used APT components and 402 (49.6%) MBT components. The survival rate of NexGen APT was 97.1% and that of NexGen MBT was 93.2% (p = 0.36). Removal of the implant occurred overall in 15 cases, for MBT in ten cases, and for APT in four cases. The FS was proved to be significantly higher when APT components were implanted in younger patients than for MBT (p = 0.005). A similar range of motion between the components was recorded (p = 0.1926).ConclusionUnder defined conditions, we measured the clinical results of implants from a single manufacturer implanted in a single department using a similar surgical technique. Considering the limitations, we suggest that all-polyethylene tibial components are equal or even superior to metal-backed ones across the examined age categories.

Cost-Effectiveness Rivaroxaban versus Enoxaparin for Prevention of Venous Thromboembolism after Knee Replacement Surgery in Iran.

The highest risk of developing venous thromboembolism (VTE) is seen in patients who have undergone orthopedic surgery. One of the most common methods to reduce the risk of thromboembolism in these patients is anticoagulant prophylaxis. Rivaroxaban is one of the anticoagulants that has a lower cost than other anticoagulants and has a significant effect on people's quality of life as it is edible. The study aimed to determine the cost-effectiveness of rivaroxaban as compared with enoxaparin for venous thromboembolism prophylaxis in knee replacement patients in Iran. It was a quantitative and economic evaluation study with a cost-effectiveness approach and an applied study because its results could be used directly for policy-making and decision-making in the health system. The study was conducted in 2019 and 2020. This study considered the health system perspective. The study population included all knee replacement patients. The sample included 203 patients referred to Shafa Yahyaeian Hospital and 300 patients referred to Rasoul Hospital in Tehran. The study was conducted in two steps. A systematic review of studies was conducted in the first step. The CHEERS checklist was used to evaluate the quality of the studies in the systematic review. The EQ-5D questionnaire was used in the second step to calculate the QALY, and the cost collection form was used to calculate the direct medical cost. The data were analyzed through a decision tree, and Stata and Tree age pro softwares were the analysis tools. Also, according to the per capita GDP index for Iran in 2018, the incremental cost-effectiveness threshold was considered to be $10,000. The results of this study showed that during the prophylaxis period, rivaroxaban was one and a half times less costly than enoxaparin. Quality of life in uncomplicated conditions were 0.85 QALY for rivaroxaban and 0.69 QALY for enoxaparin. Based on the results of this study, the cost of rivaroxaban during the prophylaxis was $ 160.97 and the quality of life was 0.85 QALY and the cost of enoxaparin was $ 276.07 and the quality of life was 0.69 QALY. The cost difference between the two interventions was $ 115.09 and the outcome difference was 0.16 QALY. The incremental cost-effectiveness ratio was $ 189.40 for rivaroxaban and $ 416.28 for enoxaparin. According to the results of this study, rivaroxaban reduced the duration of hospitalization by an average of 2 days in asymptomatic patients (prophylaxis period) compared to enoxaparin. Rivaroxaban, an oral medication, reduced costs and increased the quality of life in people undergoing knee replacement surgery compared with an enoxaparin injection vial. This drug was less costly for the patient and health systems and its use was cost-effective as a thromboprophylaxis drug following knee replacement surgery.

Awareness About Total Knee Arthroplasty Among Hail Population.

Knee joint osteoarthritis is the most common among older adults. The knee joint needs to be treated surgically. The prevalence of this disorder is believed to be higher than 40% among people over 60. To study public awareness about total knee replacement among the Hail population and to explore the relationship between the level of awareness and different socio-demographic factors. A cross-sectional study was carried out in Hail, Saudi Arabia, using an online self-administered questionnaire created via Google Forms. Collected data were coded, entered, and analyzed using the Statistical Package for Social Sciences (SPSS; Version 23). A total of 431 participants enrolled in the study, of which 242 (56.15%) were males and 189 (43.9%) were females. Out of a total of 34 points, the average awareness score was 15 ± 6 (range: 5-33), with a mean percentage of awareness of 44.1%. The most reported causes of total knee replacement were overweight or obesity (82.6%), aging (61%), and rheumatoid arthritis (45.2%). The most known symptoms were pain (85.6%) and clicking sounds during movements (64.7%). Regarding the knowledge about the treatment, both physiotherapy and weight reduction were mentioned by 290 (67.3%), exercise by 244 (56.6%), and surgical intervention by 177 (41.1%) participants. The purpose of knee replacement surgery was to relieve pain according to 357 (82.8%) participants, improve walking quality according to 257 (59.6%) participants, and be able to do prayers (while kneeling) according to 215 (49.9%) participants. The most reported reasons that might prevent the participants from undergoing knee replacement surgery were the pain after surgery (59.4%), unavailability of surgeons (35.5%), and general complications from anesthesia (37.4%). Moreover, 188 (43.6%) participants thought that knee osteoarthritis is diagnosed using magnetic resonance imaging (MRI). Educational level was found to be associated with awareness score (p = .012). Conversely, gender, nationality, residence, and history of chronic disease were not found to be associated with awareness about total knee replacement (p = .548, .357, .734, and .639, respectively). An average level of awareness and knowledge regarding total knee replacement was observed. Educational level was found to be significantly associated with this awareness.

Trends in characterization and analysis of TKA implants for 3D printing

In almost every country, knee joint problems are common among humans. As per American Academy of Orthopedic Surgeons, it is estimated that 3.5 million individuals in the world will undergo knee replacement surgery by 2030. People with advanced rheumatoid arthritis, or long-standing osteoarthritis are usually affected by this deformity due to changes in lifestyle. These conditions mainly affect middle-aged and elderly individuals with osteoarthritis or severe knee injuries. These problems can be overcome with the help of total knee implants by undergoing surgical procedures for providing relaxation &amp; comfort to the knee joint. These procedures are also known as total knee arthroplasty (TKA). TKA is an ancient surgical process employed for treating intracapsular knee joint arthritis. It is promising technique greatly augmenting a patient’s standard of life. The main components of TKA are femoral and tibial components, spacer, and patellar components respectively. Materials often used in these components include titanium, Ti6Al4V, cobalt-chromium alloys, polyethylene and bio compatible materials. 3D printing of TKA implants is a recent avenue being explored by researchers in an attempt to develop a better replacement for the conventional implants for providing comfort to the patients. This paper presents thorough assessment of research trends in mechanical characterization and finite element analysis of knee joint prosthetics, especially TKA implants for 3D printing.

Post-operative complications of total knee arthroplasty in patients with hypertension.

Hypertension is one of the most common comorbidities among patients undergoing surgery. However, few studies have focused on patients undergoing knee arthroplasty, and most of them had small sample sizes. This study aimed to analyze post-operative complications associated with hypertension in patients who underwent knee replacement surgery. Data from the 2019 National Inpatient Sample (NIS) database were used. Patients who underwent primary total knee arthroplasty (pTKA) and those who underwent aseptic revision total knee arthroplasty (rTKA) were analyzed separately. Propensity score matching was performed to reduce the effects of demographic factors and comorbidities other than hypertension on post-operative complications. A multinomial logistic regression that included all significantly different demographics and comorbidities was performed to verify the results and evaluate the odds ratios. A total of 107,981 patients who underwent pTKA and 6571 who underwent rTKA owing to mechanical complications were identified in the 2019 NIS database. Compared with the non-hypertension group, patients with hypertension had a higher risk of developing acute renal failure and electrolyte disorders after TKA. Further analysis revealed that hyponatraemia and hypokalaemia were associated with hypertension. Hypertension was associated with the incidence of acute renal failure after TKA. It is important to identify patients with risk factors for acute renal failure (in addition to hypertension) and take careful measures to prevent acute renal failure in them.

Autologous micro-fragmented adipose tissue associated with arthroscopy in moderate–severe knee osteoarthritis: outcome at two year follow-up

BackgroundAdipose tissue has recently gained growing interest in the treatment of osteoarthritis (OA). The aim of the present study was to evaluate the efficacy of a single injection of autologous micro-fragmented adipose tissue (aMFAT) associated with arthroscopy (cartilage debridement/meniscal regularization or selective meniscectomy/micro-drilling) for symptomatic knee OA.MethodsThis retrospective, single-center study included 49 patients (50 knees) affected by knee OA (radiographic Kellgren-Lawrence III-IV) treated with a single injection of autologous micro-fragmented adipose tissue and knee arthroscopy. Knee Injury and Osteoarthritis Outcome Score (KOOS) and subjective International Knee Documentation Committee (IKDC) score were the primary outcome measures and were collected at one and 2 years post-operatively. Patients were divided into clusters based on age, complexity of arthroscopic procedures and chondral lesion grade.ResultsFour patients underwent knee replacement (8%). No major adverse events were reported. Minimal Clinically Important Difference (MCID) for KOOS and IKDC was reached by 84 and 74% of all cases at 1 year and by 80 and 76% at 2 years, respectively. High grade chondral lesions negatively affected the outcome at 2 years follow-up (p < 0.05 for IKDC, KOOS overall and 3 out of 5 subscales).ConclusionThe injection of micro-fragmented adipose tissue associated with arthroscopy demonstrated to be a safe and effective procedure for the treatment of knee OA, with a substantial improvement in IKDC and KOOS scores and without major complications.

Importance of Patient Involvement in Creating Content for eHealth Interventions: Qualitative Case Report in Orthopedics.

In many industries, collaboration with end users is a standard practice when developing or improving a product or service. This process aims for a much better understanding of who the end user is and how the product or service could be of added value to them. Although patient (end user) involvement in the development of eHealth apps is increasing, this involvement has mainly focused on the design, functionalities, usability, and readability of its content thus far. Although this is very important, it does not ensure that the content provided aligns with patients' priorities. In this study, we aimed to explore the added value of patient involvement in developing the content for an eHealth app. By comparing the findings from this study with the existing app, we aimed to identify the additional informational needs of patients. In addition, we aimed to help improve the content of apps that are already available for patients with knee replacements, including the app our group studied in 2019. Patients from a large Dutch orthopedic clinic participated in semistructured one-on-one interviews and a focus group session. All the patients had undergone knee replacement surgery in the months before the interviews, had used the app, and were therefore capable of discussing what information they missed or wished for before and after the surgery. The output was inductively organized into larger themes and an overview of suggestions for improvement. The interviews and focus group session with 11 patients identified 6 major themes and 30 suggestions for improvement, ranging from information for better management of expectations to various practical needs during each stage of the treatment. The outcomes were discussed with the medical staff for learning purposes and properly translated into an improved version of the app's content. In this study, patients identified many suggestions for improvement, demonstrating the added value of involving patients when creating the content of eHealth interventions. In addition, our study demonstrates that a relatively small group of patients can contribute to improving an app's content from the patient's perspective. Given the growing emphasis on patients' self-management, it is crucial that the information they receive is not only relevant from a health care provider's perspective but also aligns with what really matters to patients. Netherlands Trial Register NL8295; https://trialsearch.who.int/Trial2.aspx?TrialID=NL8295.

Effects of instrumental therapy compared to convection therapy in subjects undergoing knee replacement

Total knee replacement (TKR) surgery is frequently done and highly successfully. It relieves pain and improves knee function in people with advanced arthritis of the joint [1]. Rehabilitation shows a key role in improving functional outcomes and quality of life in patients with TKR. Visual feedback showed interesting results in increasing motor control in post-operative patients [2]. The study aims to evaluate the effectiveness of the use of motor rehabilitation tools in orthopedic patients, in particular on subjects undergoing intensive rehabilitation after knee replacement. A clinical randomized controlled study including patients undergoing intensive rehabilitation after TKR and randomly divided in 2 groups (1:1), Group A, introducing visual feedback utilizing Walker View 3.0 SCX and ProKin 252 (Bergamo, Italy) and Group B, conventional rehabilitation treatment. At the beginning of treatment (T0) and at the end of treatment (T1), the subjects underwent physiatric examination, clinical scales (VAS, Barthel Index) and gait analysis (BTS Bioengineering, Garbagnate Milanese MI). We included 60 subjects mean age 70 ± 5, post-operation therapy period (37 ± 7 days). As shown in Table 1, both groups improved in the functional outcomes analyzed from T0 to T1. However, at T1 we registered a statistical difference in gait analysis between Group A and Group B. In particular, Support Phase (61.06 ± 2.32, 63.18 ± 4.06, p-value < 0,05) Index Symmetry (87.88 ± 6.72, 83.78 ± 3.67, p- value < 0,05) Obliquity (73.02 ± 12.42, 59.84 ± 12.04, p-value < 0,01) Rotation (83.77 ± 15.30, - 76.23± 2.71, p-value < 0,05) have a higher value in VFT group. The results of this study suggest that the conjunction of conventional therapy and VFT could improve gait outcomes of patients with TKN, sensitizing the motor control strategy, through the self-correction of the gait and posture deficits. VFT should be considered in the rehabilitation protocol of patients with TKR to improve knee function to potentially reduce the risk of fall.

Development of a novel intervention to improve sleep and pain in patients undergoing total knee replacement

BackgroundUp to 20% of patients experience long-term pain and dissatisfaction after total knee replacement, with a negative impact on their quality of life. New approaches are needed to reduce the proportion of people to go on to experience chronic post-surgical pain. Sleep and pain are bidirectionally linked with poor sleep linked to greater pain. Interventions to improve sleep among people undergoing knee replacement offer a promising avenue. Health beliefs and barriers to engagement were explored using behaviour change theory. This study followed stages 1–4 of the Medical Research Council’s guidance for complex intervention development to develop a novel intervention aimed at improving sleep in pre-operative knee replacement patients.MethodsPre-operative focus groups and post-operative telephone interviews were conducted with knee replacement patients. Before surgery, focus groups explored sleep experiences and views about existing sleep interventions (cognitive behavioural therapy for insomnia, exercise, relaxation, mindfulness, sleep hygiene) and barriers to engagement. After surgery, telephone interviews explored any changes in sleep and views about intervention appropriateness. Data were audio-recorded, transcribed, anonymised, and analysed using framework analysis.ResultsOverall, 23 patients took part, 17 patients attended pre-operative focus groups, seven took part in a post-operative telephone interview, and one took part in a focus group and interview. Key sleep issues identified were problems getting to sleep, frequent waking during the night, and problems getting back to sleep after night waking. The main reason for these issues was knee pain and discomfort and a busy mind. Participants felt that the sleep interventions were generally acceptable with no general preference for one intervention over the others. Views of delivery mode varied in relation to digital move and group or one-to-one approaches.ConclusionExisting sleep interventions were found to be acceptable to knee replacement patients. Key barriers to engagement related to participants’ health beliefs. Addressing beliefs about the relationship between sleep and pain and enhancing understanding of the bidirectional/cyclical relationship could benefit engagement and motivation. Individuals may also require support to break the fear and avoidance cycle of pain and coping. A future intervention should ensure that patients’ preferences for sleep interventions and delivery mode can be accommodated in a real-world context.

Potential Value of Serum Uric Acid in the Identification of Postoperative Delirium in Geriatric Patients Undergoing Knee Replacement.

ObjectivesThe relationship between preoperative serum uric acid (SUA) and cerebrospinal fluid (CSF) Alzheimer-related biomarkers were investigated to determine whether high SUA is a potential risk factor for postoperative delirium (POD) and to evaluate its predictive efficacy.MethodsThe participants were selected from the Perioperative Neurocognitive Disorder Risk Factor and Prognosis (PNDRFAP) study and the Perioperative Neurocognitive Disorder and Biomarker Lifestyle (PNDABLE) study. The logistic regression equation was used to analyze the risk factors and protective factors of POD. The interaction term (SUA × Sex) was introduced into the linear model to explore the potential modification effects of sex on the identified correlations. We analyzed the mediating effects of Alzheimer-related biomarkers. Finally, we constructed the receiver operating characteristic (ROC) curve and the nomogram model to evaluate the efficacy of SUA and Alzheimer-related biomarkers in predicting POD.ResultsPatients with POD had elevated SUA level (PNDRFAP: p = 0.002, PNDABLE: p < 0.001). Preoperative SUA level was positively correlated with CSF phosphorylated tau (P-tau) (p = 0.027) and β-amyloid42 (Aβ42)/P-tau (p = 0.023). Interaction analysis did not find any modification effect of sex. The relationship between SUA and POD was partially mediated by CSF P-tau (15.3%). ROC curve showed that the model combining SUA and Alzheimer-related biomarkers had better performance in predicting POD [area under the curve (AUC) = 0.880; p < 0.001], and the predictive model is accurate.ConclusionsHigh SUA may enhance CSF P-tau level, thus increasing the risk of POD, and the model combining SUA and Alzheimer-related biomarkers can accurately predict the occurrence of POD.