Loss of knee-extension strength is related to knee swelling after total knee arthroplasty

Efficacy of Vitamin C as Glucocorticoid Substitute for Reducing Pain and Inflammation After Total Hip Arthroplasty: A Randomized Controlled Trial

BACKGROUND

Vitamin C shows strong anti-inflammatory and analgesic effects, so we explored whether it can replace glucocorticoids in reducing pain and inflammation after total hip arthroplasty (THA).

METHODS

In this prospective trial, a consecutive series of 107 patients (43.0% men, 56.8 ± 10.1 years of age, 100% Han Chinese) who underwent THA due to end-stage hip disease at our medical center between January 2023 and January 2024 were randomized to receive vitamin C, dexamethasone, or neither dexamethasone nor vitamin C after surgery. The 3 groups were compared in terms of the primary outcomes of pain reported on a visual analogue scale (VAS), perioperative morphine use, and blood indices of inflammation and fibrinolysis as well as in terms of secondary outcomes of efficacy and safety.

RESULTS

Compared with patients in the control group, those who received vitamin C or dexamethasone reported a significantly lower VAS pain score on postoperative day 1, had significantly lower perioperative morphine consumption, and demonstrated significantly lower blood levels of C-reactive protein on days 1 and 2. The 2 groups also showed a significantly lower rate of rescue analgesia on postoperative day 1 and significantly higher Harris hip scores of joint function at 2 and 12 weeks after surgery, as well as significantly smaller thigh circumference and a lower rate of swelling on the first 2 days after surgery. Either treatment was associated with a significantly lower rate of postoperative nausea and vomiting. Dexamethasone was associated with greater blood glucose levels after surgery.

CONCLUSIONS

Vitamin C may be an effective substitute for glucocorticoids for reducing morphine use and the risk of nausea or vomiting and for improving joint function after THA without side effects causing blood glucose fluctuations.

LEVEL OF EVIDENCE

Therapeutic Level I . See Instructions for Authors for a complete description of levels of evidence.

Postoperative swelling: influence of a negative pressure application in comparison to manual lymphatic drainage after total knee arthroplasty-a randomized controlled trial

PURPOSE

Postoperative soft tissue swelling is a significant factor influencing outcome after total knee arthroplasty (TKA). This prospective study aims to investigate the influence of technical device assisted negative pressure therapy (NP) on early functional outcome after TKA. NP was therefore compared to manual lymphatic drainage (MLD).

METHODS

A total of 50 consecutive patients undergoing primary TKA were enrolled. 25 subjects per group were either treated by conventional MLD or NP. Primary outcome parameter was defined as circumference of the affected limb in cm postoperative up to seven days postoperatively. Secondary outcome parameters were: Duration of hospitalization, subjective perception of pain (measured via visual analogue scale, VAS), affected limb's ROM.

RESULTS

NP showed an overall equivalent influence compared to MLD in reducing lower limb swelling, recovering of mobility and length of hospital stay after TKA. Moreover, the application of NP showed a significant decrease in overall pain perception compared to manual lymphatic drainage on day 2 and forth after surgery (p < .05).

CONCLUSIONS

Our findings show that NP could be a useful device in clinical routine treating postoperative swelling after TKA. Its application is simple and effective for the patient. Particularly given the shortage of healthcare workers and physical therapists, there is a need for supportive measures that NP could fulfil.

Effectiveness of kinesiotaping for lymphatic drainage after bilateral total knee arthroplasty: A randomized controlled trial

BACKGROUND

The effectiveness of kinesiotape for lymphatic drainage has been studied by comparing groups of patients with unilateral total knee arthroplasty (TKA). Studying its impact on persons with bilateral TKA may give a more accurate assessment of effectiveness. The purpose of this study was to evaluate the effectiveness of kinesiotaping for lymphatic drainage in reducing postoperative edema and pain and improving the knee range of motion (ROM) of adults with bilateral TKA.

METHODS

Using a randomized controlled trial, mixed-model design, 52 eligible adults began standard inpatient rehabilitation 3 to 13 days after bilateral TKA. Kinesiotape for lymphatic drainage was applied to 1 randomly selected leg of 52 consenting participants (mean age = 68.1 years, standard deviation = 7.6; 62% female). Leg circumferences, active and active-assistive knee ROM, and Numerical Pain Rating were measured bilaterally at baseline (before kinesiotaping) and on study days 1, 2, 4, 6, and 8 with kinesiotape. A mixed-model analysis of variance examined interactions among within-subjects (day, leg taped) and between-subjects (time between surgery and kinesiotape application) factors.

RESULTS

Interactions of day by taped leg by time group for knee active flexion (F = 4.32, P =.006, η2 =0.076) were attributed to higher baseline knee flexion of the taped leg for persons with 7 days or more between surgery and kinesiotaping (n = 25; mean knee flexion = 74.9°, standard deviation = 17.8) compared with the taped legs of the 6 days or less group (n = 27; mean knee flexion = 66.9°, standard deviation = 16.3). This interaction also reflects significant improvements from days 1 to 2 for the taped leg of the 6-day or less group (MeanDiffDay1-2 = 5.6°, standard error = 1.5, P =.008) and improvement of the untaped leg of the 7-day or more group (MeanDiffDay1-2 = 6.7°, standard error = 1.7, P =.005). No significant day-by-leg or day-by-leg-by-time group interactions occurred for circumferences, Numerical Pain Rating, and active knee extension and active-assistive knee flexion and extension.

CONCLUSIONS

Kinesiotaping for lymphatic drainage does not augment standard inpatient rehabilitation for edema control, ROM improvement, and pain remission after bilateral TKA.

Fall Prevention after Hip and Knee Arthroplasty

Despite the success of total knee arthroplasty and total hip arthroplasty, patients face an increased risk of postoperative falls, often due to surgery-induced changes in muscle strength. Falls can lead to serious consequences, including fractures and reduced quality of life. The majority of falls related to total joint arthroplasty occurs outside the hospital. Effective fall prevention strategies, such as patient education, exercise interventions, environmental modifications, and medication management, are crucial for reducing fall risks and improving patient outcomes. Continued research and innovation in fall prevention are essential for improving patient safety and well-being following joint arthroplasty.

Effects of kinesio taping in patients undergoing knee or hip arthroplasty: a systematic review and meta-analysis of randomized controlled trials

OBJECTIVE

To assess the effects of kinesio taping on pain, oedema, range of motion, and joint function following knee or hip arthroplasty.

METHODS

Eight databases were searched up to 9 January 2024. Patients undergoing rehabilitation after knee or hip arthroplasty were included. The intervention group received kinesio taping with postoperative rehabilitation, while the control group received postoperative rehabilitation alone. Outcomes for knee arthroplasty patients, included pain, oedema, range of motion, and the Hospital for Special Surgery knee score. For hip arthroplasty, the outcome focused on pain.

RESULTS

Eleven randomized controlled trials involving 774 participants met the inclusion criteria. In knee arthroplasty patients, kinesio taping significantly reduced pain (standardized mean difference [SMD] = -0.53, 95% CI -0.91 to -0.14, p = 0.007), and relieved thigh (SMD = -0.38, 95% CI -0.65 to -0.12, p = 0.005) and ankle circumferences (SMD = -0.53, 95% CI -0.95 to -0.12, p = 0.01). It improved the total range of motion (SMD = 1.26, 95% CI 0.93 to 1.60, p < 0.00001) and Hospital for Special Surgery knee score (SMD = 2.17, 95% CI 1.70 to 2.65, p < 0.00001). No significant pain intensity reduction was observed in hip arthroplasty patients (p = 0.25).

CONCLUSION

Kinesio taping combined with postoperative rehabilitation effectively reduces oedema and pain, and improves joint function in knee arthroplasty patients, but does not alleviate pain in patients following hip arthroplasty.

The Impact of Photobiomodulation Therapy on Swelling Reduction and Recovery Enhancement in Total Knee Arthroplasty: A Randomized Clinical Trial

Background: Total knee arthroplasty (TKA) is commonly performed for severe osteoarthritis but often results in significant postoperative swelling and discomfort, impacting early rehabilitation. Photobiomodulation therapy (PBMT), utilizing low-level laser therapy (LLLT), has emerged as a potential adjunctive treatment to alleviate these symptoms. Methods: In this single-center, nonblinded prospective randomized clinical trial, conducted from May to July 2024, 30 patients undergoing primary TKA were enrolled and divided into two groups. Fifteen patients formed the control group receiving standard postoperative care, while the intervention group consisted of another 15 patients who received additional PBMT from the first to the fifth postoperative day (POD). The swelling was assessed using bioimpedance analysis, which offers a noninvasive, safe, and efficient method for assessing postoperative swelling by measuring tissue impedance, and functional outcomes were measured using the 2-min walk test (2MWT) and active range of motion (aROM). The study was registered with ClinicalTrials.gov (NCT06426251). Results: The PBMT group demonstrated significantly lower impedance, reactance, and phase angle ratios by POD6, suggesting reduced swelling compared to the control group. In the 2MWT, the PBMT group achieved a longer walking distance of 27 m, compared to 16 m in the control group. However, there were no significant differences in aROM or Visual Analogue Scale (VAS) pain scores between the groups. Conclusions: The findings indicate that PBMT effectively reduces postoperative swelling and enhances early mobility post-TKA. These benefits suggest that PBMT can be a valuable addition to conventional postoperative care, potentially accelerating functional recovery, and reducing rehabilitation time.

How to monitor and discriminate the causes of lower limb swelling during home-based rehabilitation after total knee arthroplasty? A delphi study

PURPOSE

Swelling in the lower limbs after total knee arthroplasty (TKA) affects surgical outcomes. Prolonged swelling requires monitoring and remote management during home-based rehabilitation. Causes of swelling vary but, so far, no indicators are available to monitor and identify causes of lower limb swelling, making it difficult to implement targeted interventions. This study aimed to find the indicators to monitor and identify the causes of lower limb swelling during home-based rehabilitation after TKA by literature research and consulting experts from various disciplines.

METHODS

The Delphi method was used. Based on literature research and analysis, a set of candidate indicators was developed. Fifteen experts from different disciplines evaluated the validity of the indicators and provided modification suggestions.

RESULTS

After two rounds of Delphi consultations, consensus was reached. Agreement scores ranged from 4.40 to 5.00, with low variability (standard deviation 0.00-0.91) and high consistency (coefficient of variation 0.00-0.20). P was less than 0.05 in Kendall's W with an agreement rate of 80.00-100%. In the final set of indicators, there were five primary indicators (representing four swelling causes and a general category), along with 23 secondary indicators and 40 tertiary indicators.

CONCLUSIONS

This study preliminarily established indicators for at-home identification of post-TKA swelling caused by four distinct reasons. Further research is needed to validate the value of these indicators in distinguishing the causes of swelling.

Explaining deep learning models for age-related gait classification based on acceleration time series

BACKGROUND

Gait analysis holds significant importance in monitoring daily health, particularly among older adults. Advancements in sensor technology enable the capture of movement in real-life environments and generate big data. Machine learning, notably deep learning (DL), shows promise to use these big data in gait analysis. However, the inherent black-box nature of these models poses challenges for their clinical application. This study aims to enhance transparency in DL-based gait classification for aged-related gait patterns using Explainable Artificial Intelligence, such as SHapley Additive exPlanations (SHAP).

METHODS

In this cross-sectional study, a total of 244 participants, comprising 129 adults and 115 older adults (age>65), were included. They performed a 3-min walking task while accelerometers were affixed to the lumbar segment L3. DL models, convolutional neural network (CNN) and gated recurrent unit (GRU), were trained using 1-stride and 8-stride accelerations, respectively, to classify adult and older adult groups. SHAP was employed to explain the models' predictions.

RESULTS

CNN achieved a satisfactory performance with an accuracy of 81.4 % and an AUC of 0.89, and GRU demonstrated promising results with an accuracy of 84.5 % and an AUC of 0.94. SHAP analysis revealed that both CNN and GRU assigned higher SHAP values to the data from vertical and walking directions, particularly emphasizing data around heel contact, spanning from the terminal swing to loading response phases. Furthermore, SHAP values indicated that GRU did not treat every stride equally.

CONCLUSION

CNN accurately distinguished between adults and older adults based on the characteristics of a single stride's data. GRU achieved accurate classification by considering the relationships and subtle differences between strides. In both models, data around heel contact emerged as most critical, suggesting differences in acceleration and deceleration patterns during walking between different age groups.

Is early rehabilitation after Total Knee Replacement better with periarticular cocktail of injection or epidural Ropivacaine?

TKA is routinely done orthopaedic procedure done that aims at improving the quality of patients' life by providing pain relief, functional improvement and deformity correction. This study aims to study the efficacy and safety of a Periarticular analgesic cocktail including ropivacaine injection and epidural ropivacaine for early rehabilitation after a total knee replacement.

METHODS

Total of 100 patients divided into two groups, one group received epidural ropivacaine and second group given periarticular cocktail containing ropivacaine. Then postoperatively their pain score comparison using VAS score and their functional status is documented knee society score.

RESULTS

The mean age for the epidural group is 60.28 years, while for the periarticular cocktail group it's 60.88 years. For female patients, 34 (68%) received epidural analgesia, while 24 (48%) received periarticular cocktail. Among male patients, 16 (32%) had epidural analgesia, and 26 (52%) received periarticular cocktail. For pre-operative pain scores, patients receiving Epidural analgesia had a slightly higher mean score of 7.24 compared to those receiving Periarticular Cocktail, who had a mean score of 7.12. Patients in the Epidural group had a higher mean knee flexion of 83.84 degrees compared to the Periarticular Cocktail group, which had a mean flexion of 79.36 degrees. The Knee Society Scores (KSS) for the post-operative scores; The Epidural group had a mean score of 80.16. The Periarticular Cocktail group had a mean score of 88.40.

CONCLUSION

In conclusion, this study supports the periarticular analgesic cocktail over epidural analgesia for pain management and early rehabilitation following TKR.

Short-Term Efficacy of Integrating the Easy-Flex Device With Inpatient Rehabilitation in Individuals With Total Knee Arthroplasty: Insights From a Single-Blind Randomized Controlled Trial

OBJECTIVE

To determine the effect of Easy-Flex as an adjunct to standard inpatient rehabilitation on clinical and functional outcomes.

DESIGN

Prospective randomized controlled trial.

SETTING

Outpatient clinic and research laboratory.

PARTICIPANTS

A total of 44 patients were randomized to the Easy-Flex Group (EFG) or Control Group (CG).

INTERVENTIONS

A rehabilitation program averaging 50-60 minutes per day was implemented for the patients with CG. In the EFG, in addition to 30-40 minutes of exercise with the Easy-Flex, the rehabilitation program applied to the CG was integrated with reduced sets and repetitions, with an average duration of 20 minutes. All interventions were performed under the supervision of a physiotherapist during hospitalization. After discharge, both groups received the same home exercise program.

MAIN OUTCOME MEASURES

The primary outcome is the flexion and extension range of motion (ROM). The secondary outcomes include the Numeric Pain Rating Scale (NPRS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Five Times Sit-to-Stand Test (5-TSST), 10-Meter Walking Test (10-MWT), Short Form (SF)-12v2, and Global Rating of Change scale.

RESULTS

After 6 weeks, the overall group-by-time interaction for the 2 × 3 mixed-model analysis of variance was found to be significant for flexion ROM (P=.005), NPRS-rest (P=.04), NPRS-activity (P=.01), 10-MWT (P=.003), WOMAC (P=.021), and SF-12 physical component summary (PCS) (P=.032) in favor of EFG exercising with Easy-Flex in addition to standard rehabilitation. The between-group differences in favor of the EFG were -8.0° knee ROM, 1.35-1.5 points for pain intensity, and 0.12 m/s for gait speed. Furthermore, differences favoring EFG in NPRS-rest, 10-MWT speed, and SF-12 PCS were greater than the reported minimum clinically important difference.

CONCLUSIONS

Incorporating Easy-Flex into standard physical therapy can be a beneficial, safe, and effective approach in clinical practice, as patients undergoing total knee arthroplasty typically prioritize improving their quality of life by reducing pain and increasing ROM.

Effects of a low, medium, and high-intensity aquatic physiotherapy protocol on functional and biochemical parameters in individuals with knee osteoarthritis: protocol for a crossover randomized controlled trial

Background

Knee osteoarthritis affects the performance of daily activities, independence, and quality of life. The etiopathogenesis of this condition considers the mechanisms of activation of metalloproteinase and reactive oxygen species production pathways. Metalloproteinases-3 (MMP-3) and Glutathione Peroxidase (GPx) may be responsible for cartilage destruction. Aquatic physiotherapy promotes a positive impact on the clinical picture of osteoarthritis, and this study presents an intervention protocol that aims to evaluate the effects of a single session of different aquatic physiotherapy modalities on the biochemical and functional behavior of patients with knee osteoarthritis.

Methods

This will be a crossover randomized controlled trial in which 15 individuals will be submitted to three aquatic physiotherapy modalities with a minimum 15-day wash-out period in patients over 50 years old and diagnosed with OA in at least one knee, presence of pain and at least one functional dysfunction for at least 6 months, absence of physical limitation that prevents the exercise protocol from being performed, Kellgren and Lawrence ranking between I and IV, walk independently and without auxiliary device. Variations in the concentrations of MMP-3 and GPx in peripheral blood, pain, edema, and flexibility resulting from the three aquatic physiotherapeutic interventions will be evaluated both pre- and immediate post-intervention. The reference group will be submitted to the same aquatic physiotherapy protocols, however, only the biochemical parameters and the self-perception questionnaires will be evaluated.

Registration

ClinicalTrials.gov ( NCT05610696, 18/01/2023).

Quadriceps Strength Loss Following Total Knee Arthroplasty as a Predictor of Three-Month Strength Recovery: A Secondary Analysis of a Randomized Controlled Trial

Background and objectives Patients often experience significant quadriceps muscle weakness immediately after total knee arthroplasty (TKA), which can persist and lead to reduced physical function, increased risk of falls, and reduced patient satisfaction. Immediate postoperative quadriceps weakness is commonly caused by several factors, such as preoperative quadriceps weakness related to knee osteoarthritis (OA) and TKA-induced quadriceps weakness. Although many interventions have focused on addressing knee OA-related quadriceps weakness, there may be fewer studies specifically investigating TKA-induced quadriceps weakness. This study aimed to clarify whether TKA-induced quadriceps weakness is a significant predictor of quadriceps strength at three months postoperatively, highlighting the clinical importance of preoperative interventions targeting this specific weakness. Methods This secondary analysis of a randomized controlled trial included patients aged 60-79 years with advanced knee OA who underwent unilateral TKA. The study used pooled data from two groups of 11 participants each: those receiving preoperative low-intensity resistance training with blood flow restriction and those performing low-intensity resistance training with slow movement and tonic force generation. Quadriceps strength was assessed using a pull-type handheld dynamometer preoperatively at six weeks and one week as well as postoperatively at four days, one month, and three months. TKA-induced quadriceps weakness was defined as a change in strength from one week preoperatively to four days postoperatively. Postoperative quadriceps strength gain, reflecting postoperative recovery, was defined as the strength change from four days to three months postoperatively. Correlation and multiple regression analyses were used to identify the predictors of postoperative quadriceps strength at three months. Statistical significance was set at p < 0.05. Results The analysis included 22 participants. The median preoperative quadriceps strength was 1.1 Nm/kg (IQR: 0.9-1.4) at six weeks and 1.3 Nm/kg (IQR: 1.1-1.4) at one week. Quadriceps strength significantly decreased immediately after TKA (median quadriceps strength dropped to 0.4 Nm/kg (IQR: 0.3-0.4) at four days postoperatively) and gradually improved over three months (median three-month postoperative quadriceps strength was 0.9 Nm/kg (IQR: 0.8-1.0)). TKA-induced quadriceps weakness was -72% (SD: 11%), and postoperative quadriceps strength gain was 210% (IQR: 98-324%). TKA-induced quadriceps weakness was strongly correlated with quadriceps strength at four days (r = 0.84, p < 0.01). The postoperative quadriceps strength at four days was significantly correlated with the quadriceps strength at three months (r = 0.51, p = 0.02). Regression analysis showed that one-week preoperative quadriceps strength, TKA-induced quadriceps weakness, and postoperative quadriceps strength gain significantly predicted quadriceps strength at three months (R² = 0.77, p < 0.001). Conclusions This study highlights TKA-induced quadriceps weakness as a key predictor of postoperative quadriceps strength at three months. Preoperative interventions targeting TKA-induced weakness may improve postoperative recovery of quadriceps strength and functional outcomes.

The effect of kinesio taping on edema, pain, and functionality after total knee arthroplasty: A randomised sham-controlled double blinded clinical study

BACKGROUND

There are current studies on kinesio taping (KT) application after total knee arthroplasty (TKA), but there is no definite consensus on its effectiveness and application method yet. This study aims to evaluates the effectiveness of KT applied added to the conservative postoperative physiotherapy program (CPPP) after TKA on postoperative edema, pain, range of motion, and functions on the early period.

MATERIALS AND METHODS

This prospective, randomized, controlled, double-blind study was conducted in with 187 patients undergoing TKA. The patients were divided into 3 groups as kinesio taping (KTG), sham taping (STG) and control group (CG). KT lymphedema technique and epidermis, dermis, fascia technique were applied on the 1st and 3rd days postoperatively. Extremity circumference and joint range of motion (ROM) were measured. Visual Analog Scale, Oxford Knee Scale filled. All patients were evaluated preoperatively, on the 1st day, 3rd day, and 10th day postoperatively.

RESULTS

There were 62 patients in CTG, 62 patients in STG, and 63 patients in CG. In all circumference measurements, the difference between post-op10th day (PO10D) diameter and preoperative diameter measurement was less in KTG than in CG and STG (p < 0.001). CG was higher than the STG in the ROM values measured at PO10D.There was no significant difference between the groups in terms of OKS values (P:0.648). CG was higher than STG in post-op 1st day VAS values (P:0.042).

CONCLUSION

Adding KT to CPP after TKA reduces edema in the acute phase, but has no additive effect on pain, functionality, and ROM.

Safety and Effects of a Four-Week Preoperative Low-Load Resistance Training With Blood Flow Restriction on Pre- and Postoperative Quadriceps Strength in Patients Undergoing Total Knee Arthroplasty: A Single-Blind Randomized Controlled Trial

Background/Objectives Enhancing preoperative quadriceps strength and mitigating quadriceps strength loss due to total knee arthroplasty (TKA) is crucial for post-TKA recovery. This study compared the safety and effect of a four-week preoperative regimen of low-load resistance training with blood flow restriction (LLRT-BFR) with those of low-intensity resistance training with slow movement and tonic force generation (LST) on the pre- and postoperative quadriceps strength in patients undergoing TKA. Methods In this randomized controlled trial, 22 patients were assigned to either the LLRT-BFR (n=11) or LST (n=11) group. Primary outcomes included changes in quadriceps strength before and after the intervention and surgery. To assess safety, we monitored D-dimer and high-sensitivity C-reactive protein levels pre- and post-intervention. Statistical analysis involved independent samples t-tests and Mann-Whitney U tests for group comparisons of quadriceps strength changes. Additionally, a two-way repeated-measures analysis of variance was used to assess safety parameters. Results No significant differences were observed between the BFR and LST groups in terms of the rate of increase in quadriceps strength pre- and post-intervention (BFR: median 12.1%, interquartile range -0.8% to 19.5%; LST: median 6.2%, interquartile range 2.7% to 14.7%; p>0.99) or in the rate of reduction in quadriceps strength pre- and post-surgery (BFR: mean -72.4%, standard deviation ±11.2%; LST: mean -75.3%, standard deviation ±12.2%; p=0.57). Safety assessments showed no significant main effects of time, group, or interaction on the safety parameters (all p>0.05). Conclusions LLRT-BFR and LST demonstrated comparable effects on quadriceps strength before and after intervention and surgery in patients undergoing TKA. The lack of significant changes in the safety parameters supports the safety profile of both interventions, indicating their suitability for preoperative conditioning in patients scheduled for TKA.

Modified Squat Test for Predicting Knee Muscle Strength in Older Adults

BACKGROUND

Methods for evaluating the strength of the knee extensor muscles play a vital role in determining the functionality of the lower limbs and monitoring any alterations that occur over time in older individuals. This study assessed the validity of the Modified Squat Test (MST) in predicting knee extensor muscle strength in older adults.

METHODS

This study included a total of 110 older adults. We collected demographic information such as sex, age, body weight, height, and thigh circumference. Muscle strength was assessed by measuring the maximum voluntary isometric contraction of the knee extensors, and by performing the MST (5 and 10 repetitions) and single-leg standing balance test. Stepwise multiple linear regression analysis was used to investigate multiple factors impacting the prediction of knee extensor strength.

RESULTS

Factors such as age, sex, thigh circumference, performance on the single-leg standing eye-open (SSEO) task, and the time required to complete the 10 MST repetitions together explained 77.8% of the variation in knee extensor muscle strength among older adults. We further developed a predictive equation to calculate strength as follows: strength = 36.78 - 0.24 (age) + 6.16 (sex) + 0.19 (thigh circumference) + 0.05 (SSEO) - 0.54 (time required to complete 10 MST repetitions) ± 5.51 kg.

CONCLUSION

The 10-repetition MST is an invaluable instrument for establishing an equation to accurately predict lower limb muscle strength.

The Use of Biomarkers to Quantify Clinical Response to Total Knee Arthroplasty Interventions: A Systematic Review

The primary objective of this review was to determine whether the attenuation of the postoperative inflammatory response (PIR) after total knee arthroplasty (TKA) leads to a notable improvement in clinical outcome scores. The secondary objective of this review was to determine the optimal approach in using inflammatory biomarkers, clinical inflammatory assessments, and imaging to quantify the PIR. A systematic literature search of eight major databases was conducted using a predetermined search strategy. C-reactive protein (CRP), interleukin-6 (IL-6), erythrocyte sedimentation rate (ESR), knee surface temperature (KST), and clinical outcome data were collected and graphically displayed. Eighty-six percent of the studies that reported a statistically significant decrease in inflammatory biomarkers in their treatment group demonstrated a concordant notable improvement in clinical outcome scores. Mean CRP, IL-6, ESR, and KST values peaked on postoperative day (POD) 2, POD1, POD7, and POD 1-3, respectively. The PIR is correlated with early pain and function recovery outcomes. Future studies comparing TKA surgical methodologies and perioperative protocols should assess PIR by incorporating inflammatory biomarkers, such as CRP and IL-6, and clinical inflammatory assessment adjuncts, to provide a more comprehensive comparison.

Characterizing patient factors, perioperative interventions, and outcomes associated with inpatients falls after total knee arthroplasty

INTRODUCTION

Mechanical falls represent a potential adverse event after total knee arthroplasty (TKA) and may introduce further injury and delay postoperative recovery. This study aimed to identify patient characteristics associated with inpatient falls, to determine the impact of inpatient falls on surgical outcomes following TKA, and to describe the relationship between tourniquet and/or adductor canal block (ACB) use and fall rates.

METHODS

Patients undergoing primary, elective TKA at a single institution between 2018 and 2022 were retrospectively analyzed. Patients were stratified into groups based on whether they sustained a postoperative inpatient fall or not. Perioperative characteristics, lengths of stay (LOS), rates of 90-day readmissions, and revisions were compared, and fall characteristics were described. Subanalysis was conducted comparing fall incidence based on tourniquet and/or ACB use.

RESULTS

In total 6472 patients were included with 39 (0.6%) sustaining falls. Falls most commonly occurred on postoperative days one (43.6%) and two (30.8%), and were most commonly due to loss of balance (41.9%) or buckling (35.5%). Six (15.4%) fall patients sustained minor injuries, and one (2.6%) sustained major injury (malleolar fracture requiring non-operative orthopaedic management). The LOS (3.0 ± 1.5 vs 2.3 ± 1.5 days, p = 0.002) and all-cause revision rates at latest follow-up (10.3% vs. 2.0%, p = 0.008) were significantly higher in the fall group. Falls were comparable across subgroups based on tourniquet and/or ACB use (p = 0.429).

CONCLUSION

Patients who fell had a longer LOS and higher revision rate postoperatively. Rates of inpatient falls were comparable regardless of tourniquet and/or ACB use. Concern for inpatient falls should not influence surgeons when considering the use of tourniquets and/or ACBs, though well-designed, large-volume, prospective randomized studies are warranted to better understand this relationship.

The past and future of peri-operative interventions to reduce arthrogenic quadriceps muscle inhibition after total knee arthroplasty: A narrative review

Total knee arthroplasty (TKA) improves patient-reported function by alleviating joint pain, however the surgical trauma exacerbates already impaired muscle function, which leads to further muscle weakness and disability after surgery. This early postoperative strength loss indicates a massive neural inhibition and is primarily driven by a deficit in quadriceps muscle activation, a process known as arthrogenic muscle inhibition (AMI). To enhance acute recovery of quadriceps muscle function and long-term rehabilitation of individuals after TKA, AMI must be significantly reduced in the early post-operative period. The aim of this narrative review is to review and discuss previous efforts to mitigate AMI after TKA and to suggest new approaches and interventions for future efficacy evaluation. Several strategies have been explored to reduce the degree of post-operative quadriceps AMI and improve strength recovery after TKA by targeting post-operative swelling and inflammation or changing neural discharge. A challenge of this work is the ability to directly measure AMI and relevant contributing factors. For this review we focused on interventions that aimed to reduce post-operative swelling or improve knee extension strength or quadriceps muscle activation measured by twitch interpolation. For individuals undergoing TKA, the use of anti-inflammatory medications, tranexamic acid, cryotherapy, intra-articular drains, torniquets, and minimally invasive surgical techniques for TKA have limited benefit in attenuating quadriceps AMI early after surgery. However, interventions such as inelastic compression garments, voluntary muscle contractions, and neuro-muscular electrical stimulation show promise in mitigating or circumventing AMI and should continue to be refined and explored.

Intra-articular injection of tranexamic acid in patients with haemophilia arthritis: retrospective controlled study in total knee arthroplasty

PURPOSE

Total knee arthroplasty is the main method for the treatment of advanced haemophilic knee arthritis. Due to the particularity of hemophilia, the blood management plan is the focus of the perioperative period for haemophilia patients. This study aimed to investigate the clinical effect and safety of intra-articular injection of tranexamic acid in patients with haemophilia.

METHODS

This is a retrospective study. According to whether tranexamic acid is used or not, patients are divided into tranexamic acid group (n=30) and non-tranexamic acid group (n=29). Total blood loss, intraoperative blood loss, complete blood count, total amount of coagulation factor VIII (FVIII) usage, coagulation biomarkers, inflammatory biomarkers, knee range of motion, knee joint function, pain status, complication rate, and patient satisfaction were assessed and compared at a mean follow-up of 16 months.

RESULTS

Injecting tranexamic acid into the knee joint cavity can effectively reduce the hidden blood loss and total blood loss (P<0.001), and reduce the patient's early postoperative inflammation biomarkers, pain status, and limb swelling. Therefore, the patient can obtain a better range of motion following total knee arthroplasty. In the long run, in terms of joint function and surgical satisfaction, there are no statistically significant differences. In addition, there are no statistically significant differences between the two groups of patients in terms of the total amount of FVIII usage, length of stay, and hospitalization expenses.

CONCLUSION

In patients with haemophilia, intra-articular injection of tranexamic acid during total knee arthroplasty can effectively reduce postoperative blood loss, early postoperative inflammation levels, pain and limb swelling, and enable patients to receive higher-quality rehabilitation exercises to get better joint function. Previous studies on TKA in haemophilic patients have already demonstrated the efficacy of intra-articular injections of TXA in reducing postoperative blood loss. Our study confirms this efficacy.

Effects of 6 weeks of cryotherapy plus compression therapy after total or unicompartmental knee arthroplasty: protocol for a single-centre, single-blind randomised controlled trial

INTRODUCTION

Effective rehabilitation after total knee arthroplasty (TKA) and unicompartmental knee arthroplasty (UKA) is often impeded by pain and swelling. Beneficial short-term effects in terms of pain and opioid use after a short period of cryotherapy (±compression therapy) have been demonstrated. The effectiveness of a longer intervention period on longer-term postoperative outcomes is unclear. This study aims to assess the effects of 6 weeks of cryotherapy plus compression therapy on pain, functioning and patient satisfaction after TKA or UKA.

METHODS AND ANALYSIS

A single-centre, single-blind randomised controlled trial will be conducted at a teaching hospital in the Netherlands. Patients over age 18 with end-stage osteoarthritis planned for a TKA or UKA are eligible; 104 UKA and 104 TKA patients will be included. Both groups will be randomly allocated (1:1) into an intervention group receiving 6 weeks of cryotherapy plus compression therapy (commencing after discharge from hospital) or a control group (usual care). The primary endpoint is perceived pain at rest at 6 weeks postoperatively. Secondary outcomes include compliance with cold protocol, pain at rest during the first six postoperative weeks and at 6 and 12 months postoperatively, pain on weight bearing, opioid use, functioning, patient satisfaction and complications.

ETHICS AND DISSEMINATION

The local medical ethics committee MEC-U approved the study protocol (R22.095/NL-number NL81956.100.22). The study will be conducted in accordance with the Declaration of Helsinki and Good Clinical Practice regulations, and personal data will be handled in agreement with the Dutch Personal Data Protection Act (AGV). Written informed consent will be obtained prior to performing any of the study procedures. We will disseminate study results through multiple peer-reviewed publications and through conference presentations.

TRIAL REGISTRATION NUMBER

NCT05572359.

Responsiveness of Isokinetic Dynamometry in Patients with Osteoarthritis after Knee and Hip Arthroplasty: A Prospective Repeated-Measures Cohort Study

Functional assessments are crucial for the evaluation of rehabilitation after total knee (TKA) and hip (THA) arthroplasty. Muscle strength, a key determinant of physical function (PF), is often measured with isokinetic dynamometry (ID), which is considered the gold standard. However, studies lack evaluations of responsiveness-the ability to detect changes over time. This study aims to determine the responsiveness of ID in measuring PF in TKA and THA rehabilitation-is muscle strength a valid indicator for assessing improvement in rehabilitation processes? The pre- and post-surgery PF of 20 osteoarthritis patients (age 55-82) was assessed, using ID, performance-based and self-reported measures. Responsiveness was evaluated by comparing the observed relationship of changes in ID and PF scores with the a priori defined expected relationship of change scores. While the performance-based and self-reported measures showed significant improvements post-surgery (Cohen's d [0.42, 1.05] p < 0.05), ID showed no significant differences. Moderate correlations were found between changes in some ID parameters and selected functional tests (r ≈|0.5|, p < 0.05). Responsiveness was solely found for the peak torque of knee extension at 180°/s on the operated side. Responsiveness is an often-overlooked psychometric property of outcome measurements. The findings suggest that ID may not be fully responsive to the construct of PF after TKA and THA, raising questions about its role and usefulness in this context and the need for more appropriate assessment methods.

Continued stepped care model improves early-stage self-report quality of life and knee function after total knee arthroplasty

BACKGROUND

The Stepped Care Model (SCM) is an evidence-based treatment approach that tailors treatment intensity based on patients' health status, aiming to achieve the most positive treatment outcomes with the least intensive and cost-effective interventions. Currently, the effectiveness of the Stepped Care Model in postoperative rehabilitation for TKA (Total Knee Arthroplasty) patients has not been reported.

OBJECTIVE

The present study aimed to investigate whether the stepped care model could improve early-stage self-report quality of life and knee function after total knee arthroplasty via a prospective randomized controlled design.

METHODS

It was a mono-center, parallel-group, open-label, prospective randomized controlled study. Patients who aging from 60-75 years old as well as underwent unilateral primary total knee arthroplasty due to end-stage knee osteoarthritis between 2020.06 to 2022.02 were enrolled. Participants were randomized and arranged into two groups in a 1:1 allocation. The control group was given traditional rehabilitation guidance, while the stepped care model group was given continued stepped care. Hospital for special surgery knee score, daily living ability (ADL), knee flexion range, and adverse events at 1, 3, and 6 months after total knee arthroplasty were recorded.

RESULTS

88 patients proceeded to the final analysis. There was no significant difference of age, gender, length of stay, BMI, and educational level between the two groups at the baseline. After specific stepped care model interventions, patients showed significant improvements in HHS in 1 month (85.00 (82.25, 86.00) vs. 80.00 (75.00, 83.00), p< 0.001), 3 months (88.00 (86.00, 92.00) vs. 83.00 (76.75, 85.00), p< 0.001), and 6 months (93.00 (90.25, 98.00) vs. 88.00 (84.25, 91.75), p< 0.001) when compared with the control group. Similar results were also found in both daily living ability and knee flexion angle measurements. No adverse event was observed during the follow-up.

CONCLUSION

The present study found that the stepped care model intervention significantly improved early-stage knee function and self-reported life quality after total knee arthroplasty due to knee osteoarthritis. Female patients and those less than 70 years old benefit more from the stepped care model intervention after total knee arthroplasty.

Reliability, Concurrent Validity, and Minimal Detectable Change of the Hand-Held Dynamometry for the Assessment of Knee Muscle Strength in Patients With Revision Total Knee Arthroplasty

OBJECTIVE

To determine the concurrent validity, reliability, and minimal detectable change (MDC) of the hand-held dynamometry (HHD) for knee strength measurement in patients with revision total knee arthroplasty (r-TKA).

DESIGN

A reliability and validity analysis.

SETTING

Orthopedic and physical therapy services of university hospital.

PARTICIPANTS

The study included 42 patients with r-TKA (N=42).

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Knee muscle strength assessments were performed by 2 physiotherapists in 3 different sessions by using HHD. Participants were instructed to exert a maximal force for lasting 5 seconds against HHD. The first examiner performed the strength testing, and after 30-minutes rest, the second examiner performed the same procedure for inter-examiner reliability. One hour after the initial testing, the first examiner reperformed the strength testing for intra-examiner reliability. The correlations of the knee extensors and knee flexors strength with 50-foot walking test and 30-second chair stand test were assessed for concurrent validity.

RESULTS

The inter-examiner reliabilities of knee extensors and flexors strength measurements were 0.97 and 0.95, respectively. The SEM and the minimal detectable changes at 95% confidence level (MDC95) for knee extensors were 10.39 and 28.65 Newton-meters (Nm), and SEM and MDC95 for knee flexors were 8.70 and 23.99 Nm, respectively. The intra-examiner reliabilities of knee extensors and flexors strength measurements were 0.96. SEM and MDC95 for knee extensors were 12.00 and 33.09 Nm, and SEM and MDC95 for knee flexors were 7.78 and 21.45 Nm, respectively. The knee muscle strength showed strong significant correlations with physical performance tests (all, P<.05).

CONCLUSIONS

The HHD is a reliable and valid method for assessment of static knee strength after r-TKA. The HHD can be used to quantify changes in knee strength and also assists the clinicians to determine the effect of rehabilitation programs on muscle strength following r-TKA surgery.

Minimally invasive small incision surgical technique for unicompartmental knee arthroplasty

PURPOSE

It is always a challenge for orthopaedic surgeons to minimise surgical incisions while ensuring excellent surgical results. We propose the minimally invasive small incision (MISI) technique and an extramedullary positioning technique in the unicompartmental knee arthroplasty (UKA) surgery. This study aimed to clarify the early postoperative clinical outcomes and component alignment between MISI and conventional minimally invasive surgical (MIS) techniques.

METHODS

We prospectively enrolled 60 patients who underwent MISI-UKA and 60 patients who underwent MIS-UKA as controls. Clinical parameters include the time of straight leg raising, postoperative walking time with walker assistance, hospital stay, Numerical Rating Scale (NRS) pain score and Knee Society Score (KSS). The postoperative components and lower extremity alignment were compared between the two groups with radiographic image measurement.

RESULTS

The MISI group obtained a smaller incision during knee extension (P < 0.001) but a longer tourniquet usage time than the MIS group. The MISI group lost less blood (P < 0.001). The MISI group achieved straight leg raising and walking with aid earlier after surgery, with a shorter hospital stay than the MIS group (P < 0.001). Range of motion (ROM), NRS and KSS scores revealed no significant difference between the two groups in six months postoperative follow-up (P > 0.05). Radiographic measurement results between the two groups revealed no statistical difference (P > 0.05) CONCLUSION: The MISI-UKA could achieve faster earlier recovery after surgery and shorter hospital stays without compromising the principles of proper prosthesis position and limb alignment compared with the conventional MIS-UKA.

Indicators and medical tests to identify lower limb swelling causes after total knee arthroplasty: a Delphi study with multidisciplinary experts

BACKGROUND

Lower limb swelling after total knee arthroplasty (TKA) hinders surgical effectiveness. The poor results of studies on swelling interventions are due to the lack of a classification of swelling causes through appropriate medical tests. A gold standard is missing. This study aimed to clarify the causes of TKA postoperative swelling and how to identify them through indicators and medical tests by consulting a wide range of experts from multiple disciplines.

METHOD

The Delphi method was used. A first draft of the index was prepared based on a systematic search of the literature. A total of 11 experts from several disciplines were invited to evaluate the rationality of the indicators and suggest modifications. After two rounds of consultation, the experts reached a consensus, and the consultation was stopped.

RESULTS

The response rate of the 11 experts was 100%, and the authoritative Cr was 0.896. Kendall's W values for opinion coordination of the two rounds of consultation were 0.262 and 0.226, respectively (P < 0.001). Among the final indicators, there were 4 primary indicators for swelling cause classification (inflammatory response, poor venous return, joint hematoma, muscle damage, and healing), 19 secondary and 19 tertiary indicators.

CONCLUSION

The indications obtained by systematic literature review and multidisciplinary expert consultation are reliable and scientific. Multiple causes of lower extremity swelling after TKA were identified. Blood test indicators can reflect an inflammatory response, suggest poor venous return, and reflect muscle damage and healing progress. Ultrasound scans are needed to identify underlying thrombotic or valvular problems, joint hematomas, and muscle damage. These tests help clinicians and researchers determine the cause of swelling after TKA and take appropriate management.

Comparative study of young-old and old-old people using functional evaluation, gait characteristics, and cardiopulmonary metabolic energy consumption

BACKGROUND

Walking is an important factor in daily life. Among older adults, gait function declines with age. In contrast to the many studies revealing gait differences between young adults and older adults, few studies have further divided older adults into groups. The purpose of this study was to subdivide an older adult population by age to identify age-related differences in functional evaluation, gait characteristics and cardiopulmonary metabolic energy consumption while walking.

METHODS

This was a cross-sectional study of 62 old adult participants who were classified into two age groups of 31 participants each as follows: young-old (65-74 years) and old-old (75-84 years) group. Physical functions, activities of daily living, mood state, cognitive function, quality of life, and fall efficacy were evaluated using the Short Physical Performance Battery (SPPB), Four-square Step Test (FSST), Timed Up and Go Test (TUG), Korean Version of the Modified Barthel Index, Geriatric Depression Scale (GDS), Korean Mini-mental State Examination, EuroQol-5 Dimensions (EQ-5D) questionnaire, and the Korean version of the Fall Efficacy Scale. A three-dimensional motion capture system (Kestrel Digital RealTime System®; Motion Analysis Corporation, Santa Rosa, CA, USA) and two force plates (TF-4060-B; Tec Gihan, Kyoto, Japan) were used to investigate spatiotemporal gait parameters (velocity, cadence, stride length, stride width, step length, single support, stance phase, and swing phase), kinematic variables (hip, knee, and ankle joint angles), and kinetic variables (hip, knee, and ankle joint moment and power) of gait. A portable cardiopulmonary metabolic system (K5; Cosmed, Rome, Italy) was used to measure cardiopulmonary energy consumption.

RESULTS

The old-old group showed significantly lower SPPB, FSST, TUG, GDS-SF, and EQ-5D scores (p < 0.05). Among spatiotemporal gait parameters, velocity, stride length, and step length were significantly lower in the old-old group than in the young-old group (p < 0.05). Among the kinematic variables, the knee joint flexion angles during initial contact and terminal swing phase were significantly higher in the old-old than the young-old group (P < 0.05). The old-old group also showed a significantly lower ankle joint plantarflexion angle during the pre- and initial swing phases (P < 0.05). Among the kinetic variables, the hip joint flexion moment and knee joint absorption power in the pre-swing phase were significantly lower in the old-old than the young-old group (P < 0.05).

CONCLUSION

This study demonstrated that participants 75-84 years of age had less functional gaits than their young-old counterparts (65-74 years old). As the walking pace of old-old people diminishes, driving strength to move ahead and pressure on the knee joint also tend to decrease together with stride length. These differences in gait characteristics according to age among older adults could improve our understanding of how aging causes variations in gait that increase the risk of falls. Older adults of different ages may require customized intervention plans, such as gait training methods, to prevent age-related falls.

TRIAL REGISTRATION

Clinical trials registration information: ClinicalTrials.gov Identifier: NCT04723927 (26/01/2021).

Effects of n-3 polyunsaturated fatty acid supplementation on quadriceps weakness immediately after total knee arthroplasty: a pilot, randomized, open-label clinical trial

[Purpose] Severe quadriceps weakness immediately after total knee arthroplasty can be problematic. The n-3 long-chain polyunsaturated fatty acids have antioxidant and anti-inflammatory effects against ischemia-reperfusion injury, whereas n-6 long-chain polyunsaturated fatty acids exert pro-inflammatory effects, thereby promoting ischemia-reperfusion injury. [Participants and Methods] We explored the efficacy of preoperative n-3 long-chain polyunsaturated fatty acid supplementation against early quadriceps weakness among 20 patients scheduled for total knee arthroplasty (intervention group, n=10; control group, n=10). The intervention group received 645 mg of eicosapentaenoic acid) and 215 mg of docosahexaenoic acid daily for 30 days preoperatively. Serum eicosapentaenoic acid, docosahexaenoic acid, and arachidonic acid levels were measured preoperatively. We compared serum derivatives of reactive oxygen metabolites as oxidative stress biomarkers, knee circumference, thigh volume, knee pain during the quadriceps strength test, and quadriceps strength preoperatively and 4 days postoperatively to quantify the change. [Results] Preoperative n-3 long-chain polyunsaturated fatty acid supplementation significantly increased the (eicosapentaenoic acid+docosahexaenoic acid)/arachidonic acid ratio in the intervention group. A significantly lower increase in quadriceps weakness was exhibited in the intervention group than in the control group. However, changes in oxidative stress, knee/thigh swelling, and knee pain during strength testing did not significantly differ between the two groups. [Conclusion] Preoperative n-3 long-chain polyunsaturated fatty acid supplementation exhibited beneficial effects on quadriceps weakness immediately after total knee arthroplasty.

Functional outcomes and length of stay with early and high-intensity rehabilitation after simultaneous bilateral total knee arthroplasty

BACKGROUND

Length of stay and functional outcomes after total knee arthroplasty (TKA) are related to the timing and intensity of post-operative rehabilitation.

OBJECTIVE

To determine the effectiveness of early and high-intensity rehabilitation after simultaneous bilateral TKA.

METHODS

Prospective cohort data of 156 patients (11 men and 145 women; average age 72.0 ± 5.6 years) who underwent simultaneous bilateral primary TKA were analyzed. The intervention group (n= 82) underwent a high-intensity rehabilitation (phase II) after early postoperative standard rehabilitation (phase I) between June 2019 and May 2021. The control group (n= 74) underwent a lower-intensity rehabilitation (phase II) after phase I rehabilitation between July 2017 and May 2019. The timed up-and-go (TUG) test, timed stair climbing test (SCT), 6-minute walk test, isometric knee extensor and flexor strength of both knees, knee flexion and extension range of motion, Western Ontario McMaster Universities Osteoarthritis Index (WOMAC) for pain, stiffness, and functional levels, and the EuroQol five-dimension questionnaire were assessed preoperatively and 6 weeks after TKA.

RESULTS

The average length of hospital stay was shortened by 5.7 days (p< 0.001). Phase II rehabilitation started earlier in the intervention group than in the control group (7.7 ± 1.3 vs 13.5 ± 2.0, p< 0.001). Compared with the control group, the intervention group showed significant improvements in the measures of mobility (WOMAC-function and SCT) and strength (isometric strength of both knee extensors and flexors) 6 weeks after TKA by statistically controlling for age and preoperative functional status.

CONCLUSION

This study demonstrated that early and high-intensity rehabilitation could achieve functional improvement and shorten the length of hospital stay.

Knee Diameter and Cross-Section Area Measurements in MRI as New Promising Methods of Chondromalacia Diagnosis-Pilot Study

Background and Objectives: Chondromalacia often affects the knee joint. Risk factors for the development of cartilage degenerative changes include overweight, female sex and age. The use of radiological parameters to assess the knee joint is rarely reported in the literature. Materials and Methods: The study involved 324 patients, including 159 (49%) women and 165 (51%) men, with an age range between 8−87 years (mean: 45.1 ± 20.9). The studied group had a body mass index (BMI) in the range of 14.3−47.3 (mean: 27.7 ± 5.02). A 1.5 Tesla and 3.0 Tesla (T) MRI scanner was used to assess the cartilage of the knee joint using the Outerbridge scale. The radiological parameters analyzed were the Insall−Salvati index, knee surface area, knee AP (antero-posterior) maximal diameter and knee SD (sinistro-dexter) maximal diameter. Results: Parameters such as the knee surface area, knee AP maximal diameter and knee SD maximal diameter showed a significant correlation with Outerbridge Scale (p < 0.014). The age of the patients showed a significant correlation with each knee parameter (p < 0.004). Results of knee AP and SD maximal diameter measurements strongly depended on BMI level. Conclusions: A significant relationship was found between the knee surface area, knee AP maximal diameter and knee SD maximal diameter and the advancement of chondromalacic changes in the knee joint, age and BMI.

The Time Course of Quadriceps Strength Recovery After Total Knee Arthroplasty Is Influenced by Body Mass Index, Sex, and Age of Patients: Systematic Review and Meta-Analysis

Introduction

For patients with osteoarthritis who have undergone total knee arthroplasty (TKA), quadriceps strength is a major determinant of general physical function regardless of the parameters adopted for functional assessment. Understanding the time course of quadriceps strength recovery and effectiveness of different rehabilitation protocols is a must. Therefore, the aim of this study was to: (i) determine the magnitude of maximal voluntary strength (MVS) loss and the time course of recovery of the quadriceps muscle following TKA, (ii) identify potential moderators of strength outcomes, and (iii) investigate whether different rehabilitation practices can moderate the strength outcomes following TKA, respectively.

Design

General scientific databases and relevant journals in the field of orthopedics were searched, identifying prospective studies that investigated quadriceps’ MVS pre-to post-surgery.

Results

Seventeen studies with a total of 832 patients (39% males) were included. Results showed that in the early post-operative days, the involved quadriceps’ MVS markedly declined, after which it slowly recovered over time in a linear fashion. Thus, the greatest decline of the MVS was observed 3 days after TKA. When compared to pre-operative values, the MVS was still significantly lower 3 months after TKA and did not fully recover up to 6 months following TKA. Furthermore, a meta-regression analysis identified that the variables, time point of evaluation, patient age, sex, and BMI, significantly moderate the MVS of the quadriceps muscle.

Conclusion

The analyzed literature data showed that the decrease in strength of the involved quadriceps muscles following TKA is considerable and lasts for several months post-surgery. Therefore, we recommend to specifically target the strengthening of knee extensor muscles, preserve motor control, and apply appropriate nutrition to ensure a holistic quadriceps muscle recovery. Since age, sex, and BMI were found to be moderating factors in patients’ recovery, further research should include specific analyses considering these moderators.

Comparison of kinesio taping and cold therapy in patients with total knee arthroplasty: A randomized controlled trial

OBJECTIVE

To investigate the effects of kinesio taping and cold therapy on pain, edema, range of motion, muscle strength, functional level and quality of life in patients with total knee arthroplasty.

DESIGN

Randomised controlled trial.

SETTING

A university hospital.

SUBJECTS

One-hundred patients were included.

INTERVENTION

Patients were allocated into three groups; control group, kinesio group and cold therapy group. The control group received a standard rehabilitation program. Kinesio taping group received two fan-shaped kinesio taping bands and cold therapy group received cold packs in addition to the standard rehabilitation program.

MAIN MEASURES

The outcome measures were pain, edema, range of motion, muscle strength, functional level and quality of life. Participants were assessed at preoperative, discharge and postoperative third month.

RESULTS

The groups were similar at preoperative. A significant difference was determined in terms of pain in kinesio taping group compared to the control group at the discharge. Cold therapy was efficient in reducing postoperative swelling but kinesio taping had no significant effects on swelling control. There was no difference between the groups in terms of range of motion, muscle strength, functional level and quality of life. The groups were similar in all parameters at the postoperative third month measurements.

CONCLUSION

Fan-shaped kinesio taping is an effective technique in terms of postoperative pain relief. Cold therapy is an effective method in terms of edema control. Kinesio taping and cold therapy has no specific beneficial effect on functional level, muscle strength and quality of life compared to control group.

Feasibility and initial efficacy of a multimodal swelling intervention after total knee arthroplasty: A prospective pilot study with historical controls

BACKGROUND

Swelling after total knee arthroplasty (TKA) is often profound and persistent, increasing risks of DVT, infection, and wound dehiscence, and impairing rehabilitation. We investigated the feasibility and initial efficacy of a multimodal swelling control intervention (MSI), comprised of an inelastic adjustable compression garment (CG), manual lymph drainage (MLD) massage, and home exercise program (HEP) after total knee arthroplasty (TKA) compared to a control group.

METHODS

Sixteen individuals (mean age 64.7 ± 7.1y) performed MSI for three weeks after TKA, through day 21 (D21). Outcome measures included patient satisfaction, safety, patient adherence, and swelling measured by Single Frequency Bioimpedance Assessment (SF-BIA). All outcomes were measured preoperatively and at postoperative D4, D7, D14, D21 and, three weeks after discontinuing MSI, on D42. Efficacy of MSI was calculated with Hedge's g effect size estimates using the SF-BIA ratios for MSI versus CONTROL (N = 56; mean age 64.3 ± 9.3y) at key post operative time points.

RESULTS

Patient satisfaction was 93% with no adverse events. Adherence to CG, MLD, and HEP were 85%, 99%, and 97% respectively. Peak swelling reduction with MSI was at D21 (Hedges' g = 1.60 at D21 (95% CI 0.99, 2.21)). Minimal change in swelling was observed three weeks after cessation of MSI on D42.

CONCLUSIONS

The self-administered MSI program is feasible and demonstrated strong initial efficacy to control swelling after TKA. Minimal rebound swelling was observed once MSI was withdrawn at D21. Future studies should examine the efficacy of inelastic adjustable compression in a randomized controlled trial.

Blood Flow Restriction Enhances Rehabilitation and Return to Sport: The Paradox of Proximal Performance

The use of blood flow restriction (BFR) within rehabilitation is rapidly increasing as further research is performed elucidating purported benefits such as improved muscular strength and size, neuromuscular control, decreased pain, and increased bone mineral density. Interestingly, these benefits are not isolated to structures distal to the occlusive stimulus. Proximal gains are of high interest to rehabilitation professionals, especially those working with patients who are limited due to pain or postsurgical precautions. The review to follow will focus on current evidence and ongoing hypotheses regarding physiologic responses to BFR, current clinical applications, proximal responses to BFR training, potential practical applications for rehabilitation and injury prevention, and directions for future research. Interestingly, benefits have been found in musculature proximal to the occlusive stimulus, which may lend promise to a greater variety of patient populations and conditions. Furthermore, an increasing demand for BFR use in the sports world warrants further research for performance research and recovery.

LEVEL OF EVIDENCE

Level V, expert opinion.

Wound closure position in total knee arthroplasty: flexion versus extension-a meta-analysis of randomized controlled trials

BACKGROUND

Total knee arthroplasty (TKA) is one of the most commonly used procedures in orthopedics. However, whether different would closure positions affect the clinical outcomes after TKA remains controversial. We conducted a meta-analysis of randomized controlled trials (RCT) to assess the effect of wound closure position on clinical TKA outcomes.

METHODS

Embase, PubMed, and the Cochrane Library databases were systematically searched. A systematic review and meta-analysis of all RCTs were performed to prove the role of different wound closure positions on TKA.

RESULTS

Five RCTs containing 389 patients were included. Surgical closure of 90° flexion in TKA was associated with higher post-operative range-of-motion (ROM) at post-operative 4 weeks, lower VAS post-operative pain scores 4 weeks and 3 months, better peak torque difference of flexor muscle strength at 60 and 180°/s angular velocities between the flexion and the extension groups, and better total work difference of flexor muscle strength at 180°/s angular velocity. The American Knee Society Score did not show any significant difference between two closure techniques. No complications were described in the literature review.

CONCLUSIONS

Wound closure in 90° flexion during TKA may provide better postoperative ROM, higher pain relief, preferable muscle strength improvement in short-term follow-up, and no increase in the risks of wound complications.

LEVEL OF EVIDENCE

Level II.

Efficacy and Systemic Absorption of Peri-articular Versus Intra-articular Administration of Tranexamic Acid in Total Knee Arthroplasty: A Prospective Randomized Controlled Trial

Background

Tranexamic acid (TXA) is widely accepted as an effective method for reducing blood loss after total knee arthroplasty (TKA). As different routes of local TXA administration have been proposed to minimize systemic complications, we aimed to investigate the effectiveness and systemic absorption of peri-articular (PA) and intra-articular (IA) administration of TXA after primary TKA.

Methods

In a randomized controlled trial of patients scheduled for unilateral primary TKA, 108 were assigned to receive PA-TXA (15 mg/kg), IA-TXA (2 g), or no TXA injection. We assessed total blood loss, blood transfusion rate, and hemoglobin level changes 48 hours after surgery. Postoperative serum TXA levels, complications, and clinical symptoms of venous thromboembolism events were also evaluated.

Results

Total blood loss, hemoglobin level decreases, and blood transfusion rates in both TXA groups were significantly lower than those in the control group (P < .05), without significant differences between PA and IA groups 48 hours after surgery. Serum TXA levels in the IA group were significantly higher than those in the PA cohort at 2 hours (28.2 mg/L vs 15.6 mg/L, P < .01) and 24 hours (4.4 mg/L vs 1.7 mg/L, P < .01) postoperatively. No wound complications were found in both TXA groups, but 14% of the control group developed subcutaneous ecchymoses. No evidence of venous thromboembolism events was reported.

Conclusions

PA-TXA is an excellent alternative route of local TXA injection to decrease postoperative blood loss after TKA. PA-TXA demonstrated lower levels of postoperative serum TXA, which may be beneficial for high-risk patients.

Early postoperative straight leg raise is associated with shorter length of stay after unilateral total knee arthroplasty

PURPOSE

Shorter length of stay (LOS) after total knee arthroplasty (TKA) is cost-effective. Straight leg raise (SLR) is a common exercise prescribed after TKA, but the significance of early postoperative SLR is unknown. The primary aim of this study is to evaluate the association between early postoperative SLR and LOS. Secondary aims are to explore associations among early postoperative SLR, time to ambulation, and time to stairs climbing and identify factors related to postoperative SLR.

METHODS

888 TKAs (888 knees, 865 patients) performed at a tertiary hospital in 2016 were included for this retrospective study. All TKAs were performed with medial parapatellar approach and tourniquet. Time to events (SLR, ambulation, stair climbing), LOS and factors influencing these events were analysed using a multivariate Poisson regression model and logistic regression.

RESULTS

Patients who performed SLR on postoperative day 1 (POD1) had shorter LOS than those who did not (adjusted Mean Ratio (aMR) = 0.846, p < 0.001), with estimated mean LOS being 3.5 days and 4.1 days, respectively. Performing SLR on POD1 was also associated with shorter time to ambulation (aMR = 0.789; p < 0.001) and stair climbing (aMR = 0.811, p < 0.001). Female gender and higher rest pain on POD1 were associated with delayed postoperative SLR.

CONCLUSION

Performing SLR on POD1 after TKA is associated with shorter LOS, time to ambulation, and time to stair climbing. Early postoperative SLR can prognosticate early recovery and discharge. Optimization of preoperative muscle strength and postoperative pain may be important in early recovery after TKA.

Low-Load Unilateral and Bilateral Resistance Training to Restore Lower Limb Function in the Early Rehabilitation After Total Knee Arthroplasty: A Randomized Active-Controlled Clinical Trial

Background: Continuous passive motion (CPM) is frequently used during rehabilitation following total knee arthroplasty (TKA). Low-load resistance training (LLRT) using continuous active motion (CAM) devices is a promising alternative. We investigated the effectiveness of CPM compared to LLRT using the affected leg (CAMuni) and both legs (CAMbi) in the early post-operative rehabilitation. Hypotheses: (I) LLRT (CAMuni and CAMbi) is superior to CPM, (II) additional training of the unaffected leg (CAMbi) is more effective than unilateral training (CAMuni).

Materials and Methods: Eighty-five TKA patients were randomly assigned to three groups, respectively: (i) unilateral CPM of the operated leg; (ii) unilateral CAM of the operated leg (CAMuni); (iii) bilateral alternating CAM (CAMbi). Patients were assessed 1 day before TKA (pre-test), 1 day before discharge (post-test), and 3 months post-operatively (follow-up). Primary outcome: active knee flexion range of motion (ROM_Flex). Secondary outcomes: active knee extension ROM (ROM_Ext), swelling, pain, C-reactive protein, quality of life (Qol), physical activity, timed-up-and-go performance, stair-climbing performance, quadriceps muscle strength. Analyses of covariances were performed (modified intention-to-treat and per-protocol).

Results: Hypothesis I: Primary outcome: CAMbi resulted in a higher ROM_Flex of 9.0° (95%CI −18.03–0.04°, d = 0.76) and 6.3° (95%CI −14.31–0.99°, d = 0.61) compared to CPM at post-test and follow-up, respectively. Secondary outcomes: At post-test, C-reactive protein was lower in both CAM groups compared with CPM. Knee pain was lower in CAMuni compared to CPM. Improved ROM_Ext, reduced swelling, better stair-climbing and timed-up-and-go performance were observed for CAMbi compared to CPM. At follow-up, both CAM groups reported higher Qol and CAMbi showed a better timed-up-and-go performance. Hypothesis II: Primary outcome: CAMbi resulted in a higher knee ROM_Flex of 6.5° (95%CI −2.16–15.21°, d = 0.56) compared to CAMuni at post-test. Secondary outcomes: At post-test, improved ROM_Ext, reduced swelling, and better timed-up-and-go performance were observed in CAMbi compared to CAMuni.

Conclusions: Additional LLRT of the unaffected leg (CAMbi) seems to be more effective for recovery of function than training of the affected leg only (CAMuni), which may be mediated by positive transfer effects from the unaffected to the affected limb (cross education) and/or preserved neuromuscular function of the trained, unaffected leg.

Trial Registration:ClinicalTrials.gov Identifier: NCT02062138.

Hand-Held Dynamometry in the Inpatient Care Setting After Total Knee Arthroplasty: Reliability of Static Knee Strength Measurements

OBJECTIVE

The aim of the study was to determine intrarater and interrater reliabilities for static strength assessment of knee flexors and knee extensors in patients with total knee arthroplasty, during the acute postoperative rehabilitation.

DESIGN

Forty-five total knee arthroplasty patients were included in the study. Two physical therapists performed strength assessments by using hand-held dynamometry. Patients performed three trials and a 30-sec rest was provided between each trial. After this, a 5-min rest was provided, and then, a second investigator performed the same procedure for interrater reliability. Assessments for intrarater reliability were performed 1 hr later.

RESULTS

The intrarater reliability of knee extensors and knee flexors strength measurements were 0.96 and 0.94, respectively. The standard error of measurement and minimal detectable change 95% confidence level were 6.17 and 17.01 Nm for knee extensors and were 8.89 and 24.51 Nm for knee flexors, respectively. The interrater reliability of knee flexors and knee extensors strength measurement was 0.96 for both. The standard error of measurement and minimal detectable change values at 95% confidence level were 6.00 and 16.54 Nm for knee extensors and were 6.32 and 17.42 Nm for knee flexors, respectively.

CONCLUSIONS

Hand-held dynamometry is a reliable method to assess static knee strength. Hand-held dynamometry assessment can be implemented during acute postoperative rehabilitation. Our results may assist the clinicians in determining an accurate postoperative rehabilitation program after total knee arthroplasty surgery.

Perioperative management of elderly patients with osteoarthritis requiring total knee arthroplasty

Knee osteoarthritis is a common arthritic disease which mainly affects the elderly (≥65 years old) population. As a result of the cartilage degeneration, it can cause a significant amount of pain and functional limitation. In patients who are refractory to conservative management, total knee arthroplasty is being utilised as the last resort in management. In this review, we discuss the perioperative management of elderly patients with osteoarthritis requiring total knee arthroplasty.

Resistance exercises improve physical function in chronic Chikungunya fever patients: a randomized controlled trial

BACKGROUND

Chikungunya fever is an arboviral disease, caused by an alphavirus, the Chikungunya virus, characterized by fever and joint pain that is generally disabling in the acute phase and may last from months to years, with the potential to evolve into chronic musculoskeletal symptoms, as polyarthralgia and arthritis, which can lead to significant impairment of physical function. The non-pharmacological treatment is very important for these patients, and resistance exercises may be one rehabilitation option.

AIM

This study aimed to evaluate the efficacy of a resistance exercise protocol on the physical function, pain, and quality of life of patients with chronic Chikungunya fever.

DESIGN

A randomized, controlled, blind trial for the evaluators.

SETTING

Clinic-school of Physical therapy.

POPULATION

Thirty-one patients with Chikungunya fever and musculoskeletal symptoms lasting more than three months, recruited from the Rheumatology outpatient clinic at Clinical Hospital, Federal University of Pernambuco (HC-UFPE).

METHODS

Patients (aged 56±10 years) were randomly assigned into one of two groups: Resistance Exercise Group (REG, N.=15) or Control Group (CG, N.=16). REG performed progressive resistance exercises with elastic bands (24 sessions over 12 weeks). CG only had their symptoms monitored through phone calls, maintaining the usual care treatment. Assessments were taken at baseline and after 6 and 12 weeks of the following: physical function (30-second Chair Stand Test (30-s CST), 4-step Stair Climb Power Test (4SCPT), 40-m Fast-paced Walk Test (40m FPWT), and Disabilities of the Arm, Shoulder, Hand (DASH) questionnaire); pain (VAS and painful joints count); quality of life (Medical Outcomes Study 36-Item Short-Form Health Survey [SF-36]); and Patient Global Impression of Change (PGIC) scale.

RESULTS

There was a reduction of pain (P=0.01; d=-0.83) and an improvement of 30-s CST (P=0.04; d=0.85) in REG participants after 12 weeks. There was no significant change in the domains of SF-36. Nearly 70% of trained patients reported improvement on PGIC.

CONCLUSIONS

Resistance exercises improved physical function in sitting and standing and reduced pain in patients with chronic Chikungunya fever.

CLINICAL REHABILITATION IMPACT

Resistance exercises can be considered as a treatment approach for patients with musculoskeletal disorders in the chronic stage of Chikungunya fever.

Effects of preoperative low-intensity training with slow movement on early quadriceps weakness after total knee arthroplasty in patients with knee osteoarthritis: a retrospective propensity score-matched study

Background

Severe and early quadriceps weakness (QW) after total knee arthroplasty (TKA), which is caused by acute inflammation resulting from surgical trauma and tourniquet-induced ischemia-reperfusion (IR) injury, can be especially problematic. We focused on tourniquet-induced IR injury, because it has been shown to be preventable through ischemic and exercise preconditioning. Low-intensity resistance exercise with slow movement and tonic force generation (LST) share some similarities with ischemic and exercise preconditioning. The present study primarily aimed to clarify the efficacy of preoperative LST program as prehabilitation for early QW among patients with TKA using propensity score matching analysis.

Methods

This single-center retrospective observational study used data from patients with knee osteoarthritis (n = 277) who were scheduled to undergo unilateral TKA between August 2015 and January 2017. Those with missing outcome data due to their inability to perform tests were excluded. The LST group included participants who performed LST and aerobic exercise (LST session) more than seven times for three months prior to surgery. The control group included participants who performed less than eight LST sessions, a general and light exercise or had no exercise for three months prior to surgery. Knee circumference, thigh volume, knee pain during quadriceps strength test (QST) and timed up and go test (TUG), quadriceps strength, and TUG were measured before and 4 days after surgery. Knee swelling, thigh swelling, Δknee pain, QW, and ΔTUG were determined by comparing pre- and postoperative measurements.

Results

Propensity score matching generated 41 matched pairs who had nearly balanced characteristics. The LST group had a significantly lower knee and thigh swelling, QW, and ΔTUG compared to the control group (all, p < 0.05). No significant differences in Δknee pain during the QST and TUG were observed between both groups (both, p > 0.05).

Conclusions

The present study demonstrated the beneficial effects of preoperative LST program on knee swelling, thigh swelling, QW, and walking disability immediately after TKA.

Effect of Nonelastic Compression With an Adjustable Wrap After Total Knee Arthroplasty

Swelling is a common phenomenon after total knee arthroplasty, with potential for negative impact on the rehabilitation process and final outcome. The aim of this study was to investigate the effectiveness of a new compression protocol with a self-adjustable, nonelastic compression wrap for the knee region. This study was conducted as a prospective comparative study. Total leg volume and the circumference of the knee at three levels were compared between groups. The results of our study suggest that the application of the new compression protocol has no effect on swelling in the acute postoperative phase (0-2 days) but reduces swelling at Day 14 within the subacute phase. The observed positive effect of the compression protocol could be of clinical importance in the subacute phase as well as for a subgroup of patients suffering from aberrant quadriceps weakness concomitant with knee swelling.

Application of compression bandaging post-osteotomy results in altered pain profile; results of a single-centre randomised controlled trial

PURPOSE

To assess if application of dual-layer compression bandage to osteotomy patients post-surgery can positively influence levels of post-operative pain and swelling.

PATIENTS & METHODS

Prospective, single-centre, randomised controlled trial comparing standard care, non-compression bandaging, versus Coban™ 2 (3M). Seven day application of the latter to index leg of osteotomy patients.

RESULTS

Primary outcome data was available for 36 out of 49 study subjects (18 standard care versus 18 Coban™ 2 subjects). Median 10-cm scale pain levels showed a statistically non-significant difference at day 5 and day 12 post-surgery between standard care and Coban™ 2 respectively: 5.5 cm vs 2.5 cm (p-value 0.068) and 4.0 cm vs 2.3 cm (p-value 0.39). However, on day 12 (p-value 0.029) and week 6 (p-value 0.027), 'throbbing pain' was significantly higher for Coban™ 2 patients. Changes in limb swelling measures, comparing before and after the surgical procedure, did not differ between treatment arms. Compression led to more patients reporting bandage-related discomfort (6% standard care versus 63% Coban™ 2 patients).

CONCLUSION

Compression bandaging changes the post-surgery pain profile in osteotomy patients, but does not reduce leg swelling. Any subsequent leg compression trials must take into account patient comfort and titrate intervention length and compression rates.

Fast-track rehabilitation after total knee arthroplasty reduces length of hospital stay: A prospective, case-control clinical trial

Objectives

The aim of this study was to compare the impact of fast-track rehabilitation (FTR) and conventional rehabilitation (CR) on early recovery pattern after fast-track surgery for knee arthroplasty and conventional total knee arthroplasty (TKA).

Patients and methods

This prospective, case-control study included a total of 43 adult patients (10 males, 33 females; mean age 69 years; range, 50 to 82 years) who were clinically stable and admitted for rehabilitation after fast-track surgery for knee arthroplasty or conventional TKA January 2016 and August 2016. The patients were divided into two groups as the FTR and CR treatment groups. The FTR program was designed as a patient-focused care, early mobilization, and standardized postoperative milestones. The CR program was designed by standard postoperative rehabilitation care. Primary outcomes were the length of stay (LOS) in the hospital and knee function. Secondary outcomes were pain and activities of daily living.

Results

At baseline, both groups were similar in terms of demographic data and primary outcomes. At discharge, intra-group analysis showed significant differences in both groups in all functional outcomes, except for pain, while the inter-group LOS was also significantly different (p<0.001).

Conclusion

Our study results indicate that LOS can be reduced by FTR, yielding the same results in functional recovery and autonomy as CR.

The relationship between prescribed pre-operative knee-extensor exercise dosage and effect on knee-extensor strength prior to and following total knee arthroplasty: a systematic review and meta-regression analysis of randomized controlled trials

OBJECTIVE

The aim of this systematic review was to evaluate the relationship between prescribed knee-extensor strength exercise dosage in pre-operative exercise intervention and the effect on knee-extensor muscle strength prior to and following TKA. Additional meta-analyses report the effect of pre-habilitation on outcomes prior to and following TKA.

DESIGN

A systematic literature search was performed including RCT's evaluating the effect of pre-operative exercise prior to and following TKA. Meta-regression analysis was performed to evaluate the dose-response relationship between prescribed exercise dose and the pooled effect, measured as standardized mean difference (SMD). The prescribed exercise dose was quantified using a formula accounting for as many exercise descriptors as possible. Risk of bias in the included trials was assessed using the Cochrane Risk of Bias Tool.

RESULTS

Twelve trials with 616 patients were included. Meta-regression analysis showed no relationship between prescribed pre-operative knee-extensor exercise dosage and change in knee-extensor strength neither prior to (slope 0.0005 [95%CI -0.007 to 0.008]) or 3 months following TKA (slope 0.0014 [95%CI -0.006 to 0.009]). Prior to TKA, a moderate effect favoring pre-operative exercise for increase in knee-extensor strength was found (SMD 0.50 [95%CI 0.12 to 0.88]), but not at 3 months following TKA (SMD -0.01 [95%CI -0.45 to 0.43]). Risk of bias was generally assessed as unclear.

CONCLUSION

Meta-regression analysis of existing trials suggests no relationship between the prescribed pre-operative knee-extensor exercise dosage and the change in knee-extensor strength observed prior to and following TKA. Pre-operative exercise including knee-extensor muscle strength exercise increased knee-extensor strength moderately prior to but not 3 months following TKA.

PROTOCOL REGISTRATION

PROSPERO ID (CRD42018076308) (http://www.crd.york.ac.uk/PROSPERO/).

Home-based motor imagery intervention improves functional performance following total knee arthroplasty in the short term: a randomized controlled trial

BACKGROUND

Motor imagery (MI) is effective in improving motor performance in the healthy asymptomatic adult population. However, its possible effects among older orthopaedic patients are still poorly investigated. Therefore, this study explored whether the addition of motor imagery to routine physical therapy reduces the deterioration of quadriceps muscle strength and voluntary activation (VA) as well as other variables related to motor performance in patients after total knee arthroplasty (TKA).

METHODS

Twenty-six patients scheduled for TKA were randomized to either MI practice combined with routine physical therapy group (MIp) or to a control group receiving physical therapy alone (CON). MIp consisted of maximal voluntary isometric contraction (MViC) task: 15 min/day in the hospital, then 5 times/week in their homes for 4 weeks. MViC and VA of quadriceps muscle, knee flexion and extension range of motion, pain level, along with a Timed Up-and-Go Test (TUG) and self-reported measure of physical function (assessed using the Oxford Knee Score questionnaire [OKS]) were evaluated before (PRE) and 1 month after surgery (POST).

RESULTS

Significantly better rehabilitation outcomes were evident on the operated leg for the MIp group compared to CON: at POST, the MIp showed lower strength decrease (p = 0.012, η2 = 0.237) and unaltered VA, significantly greater than CON (p = 0.014, η2 = 0.227). There were no significant differences in knee flexion and extension range of motion and pain level (p > 0.05). Further, MIp patients performed better in TUG (p < 0.001, η2 = 0.471) and reported better OKS scores (p = 0.005, η2 = 0.280). The non-operated leg showed no significant differences in any outcomes at POST (all p > 0.05). In addition, multiple linear regression analysis showed that failure of voluntary activation explained 47% of the quadriceps muscle strength loss, with no significant difference in perceived level of pain.

CONCLUSION

MI practice, when added to physical therapy, improves both objective and subjective measures of patients' physical function after TKA, and facilitates transfer of MI strength task on functional mobility.

TRIAL REGISTRATION

Retrospectively registered on ClinicalTrials.gov NCT03684148.

Lymphatic treatments after orthopedic surgery or injury: A systematic review

BACKGROUND

Orthopedic injuries in conjunction with extensive damage to tissues, bones and blood vessels, usually require a long recovery. Associated consequences are pain, movement limitations, decreased function and occasionally, prolonged edema, which can delay or interfere with the healing process. Lymphatic and compression therapy have become increasingly common, intending to reduce edema and pain, thus, promoting the recovery process.

AIMS

To examine the efficacy of methods commonly used to reduce edema after orthopedic injury or surgery, i.e. decongestive therapy, manual lymphatic drainage, and compression bandaging.

METHODS

English literature search was undertaken in January 2019, in the following databases: Cochrane Library, MEDLINE, PEDro.

INCLUSION CRITERIA

randomized controlled or quasi-controlled trials in adults who have edema or pain after recent limb trauma or surgery. Two independent assessors rated study quality and risk of bias using the PRISMA recommendations and PEDro score.

RESULTS

We evaluated 71 papers. After excluding duplicated and irrelevant papers, 15 met the eligibility criteria (6 on lymphatic treatment and 9 on compression). Quality of papers ranged from 3 to 7 on PEDro score; of them, 13 were 1b Level of Evidence and two were 1c.

CONCLUSION

After elective surgeries, when the significant edema appears or persists beyond recovery time, complex decongestive therapy and manual edema mobilization should be recommended in addition to conventional physical therapy. In acute injuries such as ankle or distal radius fractures, lymphatic treatments and compression bandaging should be considered as part of the therapeutic protocol. Nine studies evaluated different compression modalities found that only multilayer and long stretch compression significantly reduce edema.

Physical Therapist Management of Total Knee Arthroplasty

A clinical practice guideline on total knee arthroplasty was developed by an American Physical Therapy (APTA) volunteer guideline development group that consisted of physical therapists, an orthopedic surgeon, a nurse, and a consumer. The guideline was based on systematic reviews of current scientific and clinical information and accepted approaches to management of total knee arthroplasty.