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Orthopaedic Proceedings
Vol. 106-B, Issue SUPP_15 | Pages 35 - 35
7 Aug 2024
Alotibi FS Hendrick P Moffatt F
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Background. Immersive virtual reality (VR) demonstrates potential benefits in patients with chronic low back pain (CLBP). However, few studies have investigated the feasibility and the acceptability of introducing immersive VR for use with patients with CLBP and in the Kingdom of Saudi Arabia (KSA). Aim. To investigate immersive VR's feasibility, tolerability, and acceptability as a rehabilitation intervention for adult patients with CLBP and explore the views of relevant Health Care Practitioners (HCPs) in the KSA. Methodology and Methods. A multi-centre, mixed-methods, explanatory sequential design was adopted to test immersive VR's feasibility, tolerability, and acceptability. An uncontrolled feasibility trial was conducted. The immersive VR intervention involved a training session followed by three sessions over one week using commercially available hardware and software. Feasibility outcomes were collected from patients immediately post-intervention. Patients and HCPs were recruited for semi-structured interviews. Results. Thirty-three patients and three HCPs were recruited. The feasibility a priori criteria were met for recruitment, retention, dropout, completeness of questionnaire data, treatment compliance and fidelity. Adverse events included one who reported aggravation of tinnitus, whereas two experienced dizziness. Qualitative data suggested that entertainment and motivation were key enablers. Barriers included technological capability and HCPs’ perceptions that immersive VR was time-consuming. Conclusion. The results suggested that immersive VR was feasible, acceptable, and tolerable among patients with CLBP and HCPs in clinical settings in the KSA. Further research focusing on the effectiveness is warranted in this field. Conflicts of Interest. None. Sources of Funding. None. Trial registration number. ISRCTN14434517


Bone & Joint Open
Vol. 5, Issue 7 | Pages 534 - 542
1 Jul 2024
Woods A Howard A Peckham N Rombach I Saleh A Achten J Appelbe D Thamattore P Gwilym SE

Aims

The primary aim of this study was to assess the feasibility of recruiting and retaining patients to a patient-blinded randomized controlled trial comparing corticosteroid injection (CSI) to autologous protein solution (APS) injection for the treatment of subacromial shoulder pain in a community care setting. The study focused on recruitment rates and retention of participants throughout, and collected data on the interventions’ safety and efficacy.

Methods

Participants were recruited from two community musculoskeletal treatment centres in the UK. Patients were eligible if aged 18 years or older, and had a clinical diagnosis of subacromial impingement syndrome which the treating clinician thought was suitable for treatment with a subacromial injection. Consenting patients were randomly allocated 1:1 to a patient-blinded subacromial injection of CSI (standard care) or APS. The primary outcome measures of this study relate to rates of recruitment, retention, and compliance with intervention and follow-up to determine feasibility. Secondary outcome measures relate to the safety and efficacy of the interventions.


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_11 | Pages 11 - 11
7 Jun 2023
McNamara J Eastman J Perring A Vallance N Frigyik A Pollalis A
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The development and implementation of Enhanced Recovery After Surgery (ERAS) protocols are of particular interest in elective orthopaedics due to clinical benefits and cost effectiveness. The Wycombe Arthroplasty Rapid-Recovery Pathway (WARP) was designed to streamline hip and knee joint arthroplasty to reduce time spent in hospital whilst optimising outcomes in an NHS District General Hospital. 966 patients were admitted to Wycombe General Hospital for primary elective joint replacement (60 UKR, 446 THR, 460 TKR) during the period 1st September 2020 to 31st September 2022. The WARP pathway was used for 357 (37%) patients (32 UKR, 155 THR, 170 TKR) and the standard “non-WARP” pathway was used for 609 (63%) patients (28 UKR 291 THR, 290 TKR). Data was collected on length of stay, time of mobilisation, number of physiotherapy sessions, and inpatient morbidity. Average length of stay following UKR was 0.75 days for WARP vs 2.96 for non-WARP patients, following THR was 2.17 days for WARP vs 4.17 for non-WARP patients, following TKR was 3.4 days for WARP vs 3.92 for non-WARP patients. Day-0 mobilisation after UKR was achieved in 97% of WARP vs 12% of non-WARP patients, after THR in 43% of WARP vs 14% of non-WARP patients, after TKR in 33% of WARP vs 11% of non-WARP patients. Same-day discharge was achieved in the WARP cohort in 63% of UKR, 10% of THR, 2% of TKR patients. There were no same-day discharges in the non-WARP cohort. Complications delaying mobilisation (pain, nausea/vomiting, dizziness/low BP) were identified in 8.4% of WARP vs 25% of non-WARP patients. Our cohort study shows that the initiation of WARP Rapid Recovery pathway for joint arthroplasty decreased the average length of stay after UKR by 2.21 days, after THR by 2 days, after TKR by 0.52 days. Time to first mobilisation was decreased significantly by increased rates of same-day mobilisation and reduced rates of postoperative anaesthetic-related complications


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_11 | Pages 2 - 2
1 Nov 2022
Hafeez K Umar M Desai V
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Abstract. Aim. This study was aimed to look into factors responsible for delayed mobilization after lower limb arthroplasty and effect on length of stay. Methods. It is an observational study conducted at Kings Mill Hospital from August to October 2021. All patients undergoing primary knee or hip arthroplasty were included in the study, while patients with revision surgeries were excluded. A proforma was designed to record demographics and different variables including medications, type of anaesthesia, orthostatic hypotension, dizziness, preop and post op pain score, fall in haemoglobin, analgesia and length of stay. Patients were assessed on day one and data was recorded in the proforma. Data was analysed using SPSS. Results. There were 60 patients (32 females and 28 males) which were included in the study. Mean age was 69.62 years. Thirty patients underwent TKA while in the rest of 30 patients THA was done. Fifty patients were mobilized on day one while 10 patients failed to mobilise. Out of different variables assessed orthostatic hypotension, dizziness, pre mobilization pain score and pain score during mobilization were found to be significant. Mean length of stay was longer in patients with delayed mobilization (P=0.018). Conclusion. Pain, dizziness and orthostatic hypotension were independent factors affecting mobilization after lower limb arthroplasty and indirectly increasing the length of stay


Bone & Joint 360
Vol. 11, Issue 5 | Pages 42 - 44
1 Oct 2022


Bone & Joint Open
Vol. 3, Issue 9 | Pages 684 - 691
1 Sep 2022
Rodriguez S Shen TS Lebrun DG Della Valle AG Ast MP Rodriguez JA

Aims. The volume of ambulatory total hip arthroplasty (THA) procedures is increasing due to the emphasis on value-based care. The purpose of the study is to identify the causes for failed same-day discharge (SDD) and perioperative factors leading to failed SDD. Methods. This retrospective cohort study followed pre-selected patients for SDD THA from 1 August 2018 to 31 December 2020. Inclusion criteria were patients undergoing unilateral THA with appropriate social support, age 18 to 75 years, and BMI < 37 kg/m. 2. Patients with opioid dependence, coronary artery disease, and valvular heart disease were excluded. Demographics, comorbidities, and perioperative data were collected from the electronic medical records. Possible risk factors for failed SDD were identified using multivariate logistic regression. Results. In all, 278 patients were identified with a mean age of 57.1 years (SD 8.1) and a mean BMI of 27.3 kg/m. 2. (SD 4.5). A total of 96 patients failed SDD, with the most common reasons being failure to clear physical therapy (26%), dizziness (22%), and postoperative nausea and vomiting (11%). Risk factors associated with failed SDD included smokers (odds ratio (OR) 6.24; p = 0.009), a maximum postoperative pain score > 8 (OR 4.76; p = 0.004), and procedures starting after 11 am (OR 2.28; p = 0.015). A higher postoperative tolerable pain goal (numerical rating scale 4 to 10) was found to be associated with successful SDD (OR 2.7; p = 0.001). Age, BMI, surgical approach, American Society of Anesthesiologists grade, and anaesthesia type were not associated with failed SDD. Conclusion. SDD is a safe and viable option for pre-selected patients interested in rapid recovery THA. The most common causes for failure to launch were failing to clear physical thereapy and patient symptomatology. Risk factors associated with failed SSD highlight the importance of preoperative counselling regarding smoking cessation and postoperative pain to set reasonable expectations. Future interventions should aim to improve patient postoperative mobilization, pain control, and decrease symptomatology. Cite this article: Bone Jt Open 2022;3(9):684–691


Bone & Joint Open
Vol. 2, Issue 12 | Pages 1082 - 1088
1 Dec 2021
Hippalgaonkar K Chandak V Daultani D Mulpur P Eachempati KK Reddy AG

Aims

Single-shot adductor canal block (ACB) after total knee arthroplasty (TKA) for postoperative analgesia is a common modality. Patients can experience breakthrough pain when the effect of ACB wears off. Local anaesthetic infusion through an intra-articular catheter (IAC) can help manage breakthrough pain after TKA. We hypothesized that combined ACB with ropivacaine infusion through IAC is associated with better pain relief compared to ACB used alone.

Methods

This study was a prospective double-blinded placebo-controlled randomized controlled trial to compare the efficacy of combined ACB+ IAC-ropivacaine infusion (study group, n = 68) versus single-shot ACB+ intra-articular normal saline placebo (control group, n = 66) after primary TKA. The primary outcome was assessment of pain, using the visual analogue scale (VAS) recorded at 6, 12, 24, and 48 hours after surgery. Secondary outcomes included active knee ROM 48 hours after surgery and additional requirement of analgesia for breakthrough pain.


Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_13 | Pages 148 - 148
1 Nov 2021
Maheu E Soriot-Thomas S Noël E Ganry H Lespesailles E Cortet B
Full Access

Introduction and Objective. Knee osteoarthritis (KOA) is a frequent disease for which therapeutic possibilities are limited. In current recommendations, the first-line analgesic is acetaminophen. However, low efficacy of acetaminophen, frequently leads to the use of weak opioids (WO) despite their poor tolerance, especially in elderly patients. The primary objective was to compare the analgesic efficacy and safety of a new wearable transcutaneous electrical nerve stimulation (W-TENS) to weak opioids (WO) in the treatment of moderate to severe, nociceptive, chronic pain in knee osteoarthritis patients. Materials and Methods. ArthroTENS study is a phase 3, non-inferiority, multicentric, prospective, randomized, single-blinded for primary efficacy outcome, controlled, in 2-parallel groups, clinical study comparing W-TENS versus WO over a 3-month controlled period with an additional, optional, non-controlled, 3-month follow-up for patients in W-TENS group. The co-primary outcome was KOA pain intensity (PI) at month 3 and the number of adverse events (AEs) over 3 months. Results. The non-inferiority of W-TENS was demonstrated in both the PP and ITT populations. At M3, PI in PP population was 3.87 (2.12) compared to 4.66 (2.37) (delta: −0.79 (0.44); 95% CI (−1.65; 0.08)) in W-TENS and WO groups, respectively. Since the absolute value of the 95% CI of the between-treatments mean PI difference [−1.71, – 0.12] was above 0 in ITT set, the planned superiority analysis was performed, demonstrating that W-TENS was significantly superior to WO at M3 (P=0.0124). At M1 and M3, the W-TENS group reached the absolute minimal clinically important difference (MCID) for an analgesic (1.8 (2.1) and 2.1 (2.3), respectively), corresponding to a 20 mm reduction in PI (interquartile range: 15–30) on a 0–100 mm visual analogic scale – i.e. 2 points on a numerical rating scale – which equates to “much better”. Conversely, in the WO group, a 0.5 (1.8) and a 1.1 (2.1) reduction in PI were observed at M1 and M3, respectively, while a 1-point reduction in PI is required to be considered as a “slightly better” improvement. In WO group, AEs were the common systemic AEs reported with WO (nausea, constipation, drowsiness, dizziness, pruritus, vomiting, dry mouth). AEs in W-TENS group were local, such as local cutaneous reaction (erythema). Thirty-nine (70.9%) patients wished to extend W-TENS treatment for 3 additional months. Only one patient discontinued this additional period and results were maintained at M6. Conclusions. W-TENS was more effective and better tolerated than WO in the treatment of nociceptive KOA chronic pain and could represent an interesting non-pharmacological alternative to WO


Bone & Joint 360
Vol. 10, Issue 1 | Pages 19 - 24
1 Feb 2021


The Bone & Joint Journal
Vol. 103-B, Issue 1 | Pages 65 - 70
1 Jan 2021
Nikolaus OB Rowe T Springer BD Fehring TK Martin JR

Aims

Recent improvements in surgical technique and perioperative blood management after total joint replacement (TJR) have decreased rates of transfusion. However, as many surgeons transition to outpatient TJR, obtaining routine postoperative blood tests becomes more challenging. Therefore, we sought to determine if a preoperative outpatient assessment tool that stratifies patients based on numerous medical comorbidities could predict who required postoperative haemoglobin (Hb) measurement.

Methods

We performed a prospective study of consecutive unilateral primary total knee arthroplasties (TKAs) and total hip arthroplasties (THAs) performed at a single institution. Prospectively collected data included preoperative and postoperative Hb levels, need for blood transfusion, length of hospital stay, and Outpatient Arthroplasty Risk Assessment (OARA) score.


The Bone & Joint Journal
Vol. 102-B, Issue 9 | Pages 1151 - 1157
14 Sep 2020
Levack AE McLawhorn AS Dodwell E DelPizzo K Nguyen J Sink E

Aims

Tranexamic acid (TXA) has been shown to reduce blood loss and transfusion requirements in patients undergoing orthopaedic surgery. There remains a lack of prospective evidence for the use of TXA in patients undergoing periacetabular osteotomy (PAO). The purpose of this study was to determine if intravenous (IV) TXA is effective in reducing calculated blood loss and transfusions after PAO.

Methods

This was a single-centre prospective double-blind placebo-controlled randomized trial of 81 patients aged 12 to 45 years undergoing elective PAO by a single surgeon. The intervention group (n = 40) received two doses of IV TXA of a maximum 1 g in each dose; the control group (n = 41) received two doses of 50 ml 0.9% saline IV. The primary outcome was perioperative calculated blood loss. Secondary outcomes included allogenic transfusions and six-week postoperative complications.


Bone & Joint 360
Vol. 9, Issue 3 | Pages 11 - 14
1 Jun 2020


Orthopaedic Proceedings
Vol. 102-B, Issue SUPP_1 | Pages 9 - 9
1 Feb 2020
Vendittoli P Lavigne M Pellei K Desmeules F Masse V Fortier L
Full Access

INTRODUCTION. In recent years, there has been a shift toward outpatient and short-stay protocols for patients undergoing total hip arthroplasty (THA) and total knee arthroplasty (TKA). We developed a peri-operative THA and TKA short stay protocol following the Enhance Recovery After Surgery principles (ERAS), aiming at both optimizing patients’ outcomes and reducing the hospital length of stay. The objective of this study was to evaluate the implementation of our ERAS short-stay protocol. We hypothesized that our ERAS THA and TKA short-stay protocol would result in a lower complication rate, shorter hospital length of stay and reduced direct health care costs compared to our standard procedure. METHODS. We compared the complications rated according to Clavien-Dindo scale, hospital length of stay and costs of the episode of care between a prospective cohort of 120 ERAS short-stay THA or TKA and a matched historical control group of 150 THA or TKA. RESULTS. Significantly lower rate of Grade 1 and 2 complications in the ERAS short-stay group compared with the standard group (mean 0.8 vs 3.0, p<0.001). Postoperative complications that were experienced by significantly more patients in the control group included pain (67% vs 13%, p<0.001), nausea (42% vs 12%, p<0.001), vomiting (25% vs 0.9%, p<0.001), dizziness (15% vs 4%, p=0.006), headache (4% vs 0%, p=0.04), constipation (8% vs 0%, p=0.002), hypotension (26% vs 11%, p=0.003), anemia (8% vs 0%, p=0.002), oedema of the operated leg (9% vs 1%, p=0.005), persistent lameness (4% vs 0%, p=0.04), urinary retention (13% vs 4%, p=0.006) and anemia requiring blood or iron transfusion (8% vs 0%, p=0.002). No difference was found between the 2 groups for Grade 3, 4, or 5 complications. The mean hospital length of stay for the ERAS short-stay group decreased by 2.8 days for the THAs (0.1 vs 2.9 days, p bellow 0.001) and 3.9 days for the TKAs (1.0 vs 4.9 days, p<0.001). The mean estimated direct health care costs reduction with the ERAS short-stay protocol was 1489% per THA and 4206% per TKA. DISCUSSION AND CONCLUSION. Shorter hospitalization time after THA and TKA is associated with lower risk of nosocomial infections and adverse events related to reduced mobilization such as venous thromboembolism, pulmonary atelectasis, and constipation. In addition, it increases bed availability in a restricted environment and is very favorable economically for the care provider. Multiple strategies have been described to reduce hospital length of stay. One attractive option is to follow the ERAS principles to improve patient experience to a level where they will feel confident to leave for home earlier. Implementation of a ERAS short-stay protocol for patients undergoing THA or TKA at our institution resulted not only in reduced hospital length of stay, but also in improved patient care and reduced direct health care costs


The Bone & Joint Journal
Vol. 102-B, Issue 1 | Pages 82 - 89
1 Jan 2020
Coenders MJ Mathijssen NMC Vehmeijer SBW

Aims. The aim of this study was to report our experience at 3.5 years with outpatient total hip arthroplasty (THA). Methods. In this prospective cohort study, we included all patients who were planned to receive primary THA through the anterior approach between 1 April 2014 and 1 October 2017. Patient-related data and surgical information were recorded. Patient reported outcome measures (PROMs) related to the hip and an anchor question were taken preoperatively, at six weeks, three months, and one year after surgery. All complications, readmissions, and reoperations were registered. Results. Of the 647 THA patients who had surgery in this period through the anterior approach, 257 patients (39.7%) met the inclusion criteria and were scheduled for THA in an outpatient setting. Of these, 40 patients (15.6%) were admitted to the hospital, mainly because of postoperative nausea and/or dizziness. All other 217 patients were able to go home on the day of surgery. All hip-related PROMs improved significantly up to 12 months after surgery, compared with the scores before surgery. There were three readmissions and two reoperations in the outpatient cohort. There were no complications related to the outpatient THA protocol. Conclusion. These study results confirm that outpatient THA can be performed safe and successfully in a selected group of patients, with satisfying results up to one year postoperatively, and without outpatient-related complications, readmissions, and reoperations. Cite this article: Bone Joint J 2020;102-B(1):82–89


Orthopaedic Proceedings
Vol. 101-B, Issue SUPP_9 | Pages 18 - 18
1 Sep 2019
Reddington M Walters S Cohen J Baxter S Cole A
Full Access

Purpose of the study. The aims of the study were to explore the experiences of sciatica sufferers, their perceptions of physiotherapy and healthcare service provision. Methods. This was the qualitative element of a mixed methods study investigating the feasibility of early physiotherapy for sciatica. Participants in the pilot trial consented to take part in semi-structured interviews before and after they had undertaken an individualised physiotherapy programme. Data from the interviews was examined line by line using a thematic analysis approach with key themes and sub-themes emerging. Results. Thirty-three participants were recruited and a total of 45 interviews being carried out. 7 central themes and 17 sub-themes were generated from thematic analysis. The first-line treatment administered to all participants by their G.P was a combination of analgesia. The drugs used included paracetamol, ibuprofen, nefopam, diclofenac, tramadol, morphine, diazepam and baclofen. Neuropathic pain modulating medication such as amitriptyline, gabapentin or pregabalin was widely used. Participants reported that medication simply didn't provide sufficient pain relief at a dose where side-effects were acceptable. Twenty-four interviewees described the negative side-effects of the drugs including nausea, dizziness, confusion, constipation, drowsiness, impotence and bloating. Furthermore, participants were concerned about their ability to carry out normal day to day tasks such as childcare, work and driving due to the side-effects of the drugs. Conclusion. Sciatica can be all encompassing, with severe pain and disability. A range of medication is commonly used for pain relief. The results from this study suggest that the drugs don't provide significant pain relief without deleterious side-effects in some patients. No conflicts of interest for any authors. Sources of funding: MR is the recipient of a HEE/NIHR Clinical Doctoral Research Fellowship which funded the study


Bone & Joint Research
Vol. 8, Issue 8 | Pages 405 - 413
1 Aug 2019
Huang J Bao X Xia W Zhu L Zhang J Ma J Jiang N Yang J Chen Q Jing T Liu J Ma D Xu G

Objectives

X-linked hypophosphataemic rickets (XLHR) is a disease of impaired bone mineralization characterized by hypophosphataemia caused by renal phosphate wasting. The main clinical manifestations of the disorder are O-shaped legs, X-shaped legs, delayed growth, and bone pain. XLHR is the most common inheritable form of rickets, with an incidence of 1/20 000 in humans. It accounts for approximately 80% of familial cases of hypophosphataemia and serves as the prototype of defective tubular phosphate (PO43+) transport, due to extra renal defects resulting in unregulated FGF23 activity. XLHR is caused by loss-of-function mutations in the PHEX gene. The aim of this research was to identify the genetic defect responsible for familial hypophosphataemic rickets in a four-generation Chinese Han pedigree and to analyze the function of this mutation.

Methods

The genome DNA samples of all members in the pedigree were extracted from whole blood. We sequenced all exons of the PHEX and FGF23 genes, as well as the adjacent splice site sequence with Sanger sequencing. Next, we analyzed the de novo mutation c.1692 del A of the PHEX gene with an online digital service and investigated the mutant PHEX with SWISS-MODEL, immunofluorescence, and protein stability detection.


The Bone & Joint Journal
Vol. 100-B, Issue 8 | Pages 991 - 1001
1 Aug 2018
Findlay C Ayis S Demetriades AK

Aims

The aim of this study was to determine how the short- and medium- to long-term outcome measures after total disc replacement (TDR) compare with those of anterior cervical discectomy and fusion (ACDF), using a systematic review and meta-analysis.

Patients and Methods

Databases including Medline, Embase, and Scopus were searched. Inclusion criteria involved prospective randomized control trials (RCTs) reporting the surgical treatment of patients with symptomatic degenerative cervical disc disease. Two independent investigators extracted the data. The strength of evidence was assessed using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) criteria. The primary outcome measures were overall and neurological success, and these were included in the meta-analysis. Standardized patient-reported outcomes, including the incidence of further surgery and adjacent segment disease, were summarized and discussed.


Bone & Joint 360
Vol. 7, Issue 4 | Pages 28 - 31
1 Aug 2018


Bone & Joint 360
Vol. 7, Issue 3 | Pages 1 - 1
1 Jun 2018
Ollivere B


Background. Adequate pain management is mandatory for patients' early rehabilitation and improvement of outcome after total knee arthroplasty (TKA). Conventional pain management, consisted of mainly opioids, has some adverse effects such as dizziness and nausea. Motor blockade occasionally resulted from epidural analgesics. A novel multimodal analgesic strategy with peripheral nerve block, peri-articular injection (PAI) and intravenous patient controlled analgesia (IVPCA) were utilized for our patients receiving TKA. In this study, we compared the clinical efficacy and adverse effects in the group of multimodal analgesia (MA) or epidural analgesia alone. Methods. One hundred and eighteen patients undergoing TKA with spinal anesthesia were enrolled. Patients of TKA received either our protocol of multimodal analgesia or patient controlled epidural analgesia (PCEA) alone. MA included ultrasound guided nerve block in femoral and obturator nerves before spinal anesthesia, and PAI mixed with NSAID, morphine, ropivacaine and epinephrine, as well as IVPCA after surgeries. The analgesic effect with numeric rating scale (NRS) and occurrence of adverse effects, including motor blockade, numbness, postoperative nausea/vomiting (PONV), and dizziness were recorded for all patients. Results. Thirty-one patients received MA, and eighty-seven patients received PCEA. No significant difference of NRS in MA and PCEA group within 24 hours after surgery either in rest (0.2 ± 1 compared with 0.22 ± 0.98; p = 0.930) or motion (0.40 ± 1.56 compared with 0.31± 1.23; p = 0.764). MA group sustained lesser motor blockade than PCEA (6.45% compared with 22.98%; p = 0.028) beyond 24 hours after surgery. The occurrence of numbness is lower in MA group (18.52%) compared with PCEA group(43.33%) (p=0.031). No statistic difference of PONV and dizziness is noted between two groups. However, there is a trend that lesser PONV and dizziness occurred in MA group than PCEA group. Conclusion. TKA patients receiving either MA or PCEA have adequate analgesic efficacy after surgeries. MA group has a lower incidence of motor blockade and PONV than PCEA. This multimodal analgesia proposed here has shown patients' safety and improved pain control after TKA, decreased narcotics use and their associated side effects. Besides, lesser motor blockade and adequate pain relief may encourage patient's early rehabilitation