单髁膝置换术与全膝关节置换术治疗膝关节内侧间室骨关节炎的近期疗效比较

目的探讨单髁膝置换术(UKA)与全膝关节置换术(TKA)治疗膝关节内侧间室骨关节炎的近期疗效。方法回顾性分析2017-01～2017-10对因膝关节内侧间室骨关节炎行UKA治疗患者15例(15膝),选取同期行TKA治疗患者30例(34膝)作为对照组。术前评估并记录两组患者的疼痛视觉模拟评分(VAS)、美国特种外科医院(HSS)评分、膝关节活动度(ROM),记录手术时间、术中出血量、术后3 d血红蛋白(Hb)下降量、术后3个月及1年VAS评分、HSS评分、ROM。结果所有患者手术顺利完成。两组患者年龄、体重指数(BMI)比较差异无统计学意义(P0.05)。UKA组手术时间、术中出血量、术后3 d Hb下降量、VAS评分均低于TKA组,而HSS评分、ROM高于TKA组,差异均有统计学意义(P0.05)。结论膝关节内侧间室骨关节炎的手术治疗选择UKA更优于TKA,UKA具有手术时间短、术中出血量少、术后恢复快、功能恢复良好等优点,能够取得良好的近期疗效。     

高屈曲假体与普通假体治疗膝关节骨关节炎中短期临床疗效比较

目的探讨高屈曲固定平台后稳定假体(Nex Gen-LPS-Flex)及普通固定平台后稳定假体(Nex Gen-LPS)在人工膝关节置换治疗中重度膝关节骨关节炎的中短期疗效。方法选择2010年1月至2015年2月在该院行全膝关节表面置换术的中重度膝关节骨关节炎患者67例(85膝),其中高屈曲假体组(LPS-Flex组)33例(42个膝关节),普通固定平台后稳定假体组(LPS组)34例(43个膝关节)。术后1 w~5年随访,分别于术前、术后1 w及末次随访时测定膝关节屈伸活动度,采用WOMAC健康调查表及KSS膝评分评估患者关节功能。结果术前、术后1 w及末次随访,两组KSS膝评分、WOMAC评分比较均无统计学差异(P0.05),两组膝关节屈伸活动度除末次随访时有统计学差异(P0.05)外,其他时间点均无统计学意义(P0.05)。但两组KSS膝评分、WOMAC评分、膝关节屈伸活动度均随着时间的推移逐渐改善(P0.05)。两组并发症发生率无统计学差异(P0.05)。术后6个月行膝关节X线检查,显示全部病例假体位置正常,力线良好,假体周围未见明显透亮带。结论全膝关节置换术中使用Nex Gen-LPS-Flex与Nex Gen-LPS相比,在改善患者疼痛、恢复行走功能以及手术并发症率方面无显著差别,但LPS-FLEX组膝关节屈曲功能优于LPS组。     

单髁置换术治疗老年人内侧单间室膝骨关节炎的临床疗效

目的分析固定平台单髁置换术治疗老年内侧单间室骨关节炎的临床疗效。方法解放军总医院骨科2005年1月至2010年3月收治膝关节骨关节炎患者38例,男14例,女24例;年龄60~72(66.0±5.6)岁。站立行走内侧关节间隙疼痛,术前膝关节正侧位X线等影像学检查提示内侧单间室膝骨关节炎。术前美国特种外科医院(HSS)评分(52.6±16.7),疼痛视觉模拟量表(VAS)评分(6.3±1.2),膝关节内翻畸形(8.9±1.6)°,关节活动度(112.6±23.5)°。结果手术时间(45.0±10.2)min,无血管、神经等副损伤,伤口均Ⅰ期愈合,无切口感染等并发症发生;所有患者均随访,无死亡、退出等情况,随访时间71~133(102.0±12.2)个月。末次随访时,膝关节HSS评分(91.8±17.9),VAS评分(1.8±0.9),膝关节内翻畸形(4.7±0.9)°,关节活动度(129.7±36.8)°;与术前相比,均具有显著的改善(P0.05)。结论固定平台单髁置换术治疗老年内侧单间室骨关节炎具有较好的临床疗效。     

髌股关节退变对老年膝关节单髁置换术疗效的影响

目的探讨膝前痛和髌股关节退变对老年膝关节单髁置换术(UKA)疗效的影响。方法选取2011年1¹2月在该院接受治疗的老年内侧间室骨性关节炎患者96例(101膝),术前有膝前痛42膝(有膝前痛组),无膝前痛59膝(无膝前痛组)。采用Ahlback和Altman法对患者术前髌股关节影像学情况进行评估;探讨患者术前和术后膝关节功能情况。结果末次随访时两组患者与术前相比,OKS评分、AKS膝评分、AKS膝功能评分、WOMAC评分均明显改善(P<0.01);两组间术前、末次随访各项评分之间差异均无统计学意义(P>0.05);依据Ahlback和Altman分级,末次随访各组内与术前相比评分均明显改善(P<0.01);末次随访时外侧受损组OKS评分、WOMAC评分均明显高于正常组(P<0.05);其余末次随访评分同侧与术前相比差异均无统计学意义(P>0.05)。结论膝前痛和内侧髌股关节损伤对于老年UKA的疗效无明显影响,外侧髌股关节损伤患者疗效较正常患者差。     

微创全膝关节置换术的早期疗效观察

目的探讨微创全膝关节置换术的早期疗效。方法对60例(70膝)入组患者随机分成2组进行前瞻性对照研究。微创组取股内侧肌下切口入路,采用美国捷迈公司特殊的微创器械,利用膝关节屈伸位置的不断变化和"移动窗口"技术行微创全膝关节置换术。对照组采用标准全膝关节置换手术。比较2组病例的膝关节评分(knee society score,KSS)、关节活动度(ROM)增加度数、视觉模拟评分法(VAS)、引流管出血量、切口长度和术后无协助负重行走时间(下地时间)等指标。结果术后1周KSS评分、引流管出血量、切口长度和术后无协助负重行走时间(下地时间)方面,微创组手术效果优于传统对照组,2组差异有统计学意义(P<0.05)。术后12月2组KSS评分、ROM增加度数、VAS比较,差异无统计学意义(P>0.05)。结论微创全膝关节置换术具有手术切口小、出血少、股四头肌功能干扰少等优点,可以减轻术后疼痛,尽早恢复下肢活动,短期随访手术效果优良。     

两种手术方式治疗膝关节内侧单间室骨性关节炎疗效对比分析

目的探讨膝关节单髁置换术(UKA)和全膝关节置换术(TKA)两种手术方式治疗膝关节内侧单间室骨性关节炎的应用效果。方法根据手术方式不同,将研究对象分为两组:UKA组53例和TKA组61例,收集两组病例相关资料,对手术应用效果进行对比分析和评价。结果经SAS9.1统计分析,两组病例切口长度、手术用时、术中出血量、术后VAS疼痛评分、首次直腿抬高时间、住院时间以及术后感染发生率差异均有统计学意义(均P0.05);术后1d关节活动度ROM和功能HSS评分差异无统计学意义(均P0.05)。结论两种手术方式均取得满意效果,但各有特点。UKA术前须严格病例筛选,应引起重视。     

腓骨中上段截骨治疗不均匀沉降性膝关节骨关节炎效果

目的评估腓骨中上段截骨治疗不均匀沉降性膝关节骨关节炎(KOA)的手术效果。方法 76例(92膝)明确诊断为胫骨近端不均匀沉降性KOA患者,给予腓骨中上段截骨,切除长度1.5~2 cm。通过视觉疼痛模拟评分(VAS)、美国膝关节协会评分(KSS)评估手术前后膝关节功能恢复、患者满意度及并发症发生情况,X线观察术前术后关节间隙变化情况。结果随访1~13(平均7.3)个月,VAS、KSS术前术后差异有统计学意义(P<0.01)。患者满意度优良86膝(93.5%)。X线测量短期临床影像改善59膝(64.1%)。结论腓骨截骨通过力学原理恢复膝关节周围软组织平衡,不干扰膝关节内在稳定性,可以有效缓解KOA所致的疼痛,该术式具有创伤小、恢复快、并发症少等优点,避免了胫骨高位截骨内固定、人工膝关节置换假体植入手术并发症。     

老年膝内翻关节置换治疗胫骨内侧骨缺损的临床效果

目的探讨老年膝内翻畸形人工膝关节置换术(TKA)中胫骨内侧骨缺损的修复方法和治疗效果。方法回顾性分析该院关节外科2007年5月至2013年6月收治的资料较完整的48例(53膝)老年膝内翻畸形并胫骨内侧骨缺损患者,术中采用加大胫骨截骨量(胫骨截骨组)、骨水泥充填螺钉加强(水泥充填组)、自体骨移植(骨移植组)修复胫骨内侧骨缺损。对手术情况、术后影像学、术后并发症及膝关节评测量表(KSS)评分等进行分析,以评定临床疗效。结果 53膝均获完整随访,随访6~24个月,平均15个月,有3膝出现植骨不愈合,1膝骨水泥断裂、松动,4膝假体下沉,2膝出现膝关节不稳,1膝出现深静脉血栓。胫骨截骨组KSS评分由术前(38.17±5.26)分提高至末次随访时的(85.71±4.47)分,优良率达87.5%;水泥充填组KSS评分由术前(36.56±4.15)分提高至末次随访时的(90.14±5.01)分,优良率达92.7%;骨移植组KSS评分由术前(37.27±4.92)分提高至末次随访时的(92.86±3.47)分,优良率达93.4%。水泥充填组、骨移植组修复老年患者膝内翻胫骨内侧骨缺损效果良好,术后并发症少。结论采用骨水泥充填螺钉加强或自体骨移植修复老年膝内翻人工关节置换术中胫骨侧骨缺损,疗效满意。     

全膝关节表面置换术治疗结核性膝关节强直或僵硬(附10例报告)

目的 探讨全膝关节表面置换治疗膝关节结核强直或僵硬膝的临床应用可行性。方法 回顾性分析2011年10月至2015年7月我院收治的膝关节结核强直或僵硬膝患者10例,行全膝表面置换术,术前充分评估膝关节功能及结核控制情况,对膝关节结核控制良好,骨缺损不影响假体稳定,无窦道混合感染存在者,行实验室及膝关节MRI、X线、CT扫描等影像学检查,规范化抗结核药物治疗后,行全膝表面置换术,术后继续行正规抗结核药物治疗,随访评估关节假体稳定性、膝关节功能[美国特种外科医院膝关节评分 (hospital for special surgery knee score, 简称 “HSS 评分”)]及关节活动度,关节结核的复发情况。结果 10例患者中,强直膝3例,僵硬膝7例;其中活动期膝关节结核4例,病程4~9个月;陈旧性膝关节结核6例,病程20~41个月;术后全部获24~41个月随访,平均(35.4±9.6)个月;手术时间90~118min,平均(102.0±8.5)min;患者术前膝关节僵硬角度15.0°~55.0°,至末次随访,膝关节屈膝角度恢复至95.0°~120.0°,平均(105.0±14.8)°;伸直角度恢复至-5.0°~10.0°,平均(0.5±7.0)°;术前膝关节HSS评分为(46.6±16.2)分,术后恢复至(79.6±9.6)分。至末次随访,全部假体未见松动,结核无复发。结论 在个体化正规抗结核治疗的前提下,采用普通表面膝关节置换治疗结核性膝关节强直或僵硬疗效确定、临床可行,但需严格掌握手术适应证。     

老年骨关节炎全膝置换术疗效影响因素分析

目的探讨全膝置换术治疗老年骨关节炎（0A）的疗效及其影响因素。方法回顾性分析62例膝关节OA行膝关节表面置换术患者围手术期及术后早期随访的临床资料。根据美国膝关节外科学会（HSS）评分标准、膝关节功能及膝关节活动范围等评价患者术前及术后膝关节功能。结果62例患者膝关节HSS评分由术前的46．8分提高到术后出院时的86．2分,ROM由术前68度提高到术后的98度。结论全膝置换手术治疗老年效果确切;手术效果与术前膝关节功能、HSS评分、膝关节疼痛、术后有无重大并发症、术后早期CPM应用情况显著相关。     

机器人系统辅助的膝关节单髁置换术治疗老年膝关节骨关节炎的临床效果

目的 探讨机器人手术系统辅助下膝关节单髁置换术(UKA)和传统膝关节单髁置换术治疗老年患者膝关节骨关节炎的疗效。方法 选择2018年1月至2020年6月就诊于解放军总医院第一医学中心78例老年膝关节骨关节炎患者为研究对象,按照随机数表法随机分为2组,每组39例。观察组实施MAKO RIO机器人手术系统辅助下UKA,对照组实施常规膝关节单髁置换术。对比2组患者围术期情况,术后8、16、24h 2组患者视觉模拟评分法(VAS)及术后6个月美国膝关节协会评分(KSS)。结果 观察组单侧 UKA手术时间(155±22) min、术中止血带使用时间 (27±10) min、术后第2天总失血量 (476±290) ml;对照组分别为 (135±21) min、(40±9) min、(536±215) ml,差异均有统计学意义(均P<0.05)。观察组术后8、16h VAS评分分别为(3.2±1.2)、(1.8±0.8) 分,对照组分别为(4.6±1.4)、(2.3±1.1)分,差异均有统计学意义(均P<0.05)。观察组和对照组术后24h VAS评分分别为(1.1±0.3)、(1.2±0.5)分,差异无统计学意义(P>0.05)。对照组术后6个月随访患侧膝关节KSS临床评分和功能评分分别为(78±11)、(70±16)分,观察组分别为(90±6)、(79±12)分,差异均有统计学意义(均P<0.05)。结论 机器人手术系统辅助UKA能够实现微创条件下精准手术,具有良好的安全性,促进了手术患者膝关节功能改善。     

Patellofemoral osteoarthritis does not influence clinical outcomes of fixed-bearing unicompartmental knee arthroplasty

Unicompartmental knee arthroplasty (UKA) is an ideal surgical approach in treatment of end-stage knee osteoarthritis (KOA), however, indications of UKA have been controversial, and the radiographic and symptomatic patellofemoral osteoarthritis (PFOA) are often considered as a contraindication of medial UKA. 337 fixed bearing UKAs were retrospectively recruited in our joint center between January 1, 2011 and June 30, 2020. There were 105 patients accompanied by PFOA and 232 patients have normal PF joint. International Cartilage Repair Society (ICRS) system was introduced to quantify the degeneration degree of PF joint. Oxford Knee Score (OKS), Forgotten Joint Score (FJS), Kellgren-Lawrence (K-L) classifying system and visual analogue scale (VAS) were adopted to evaluate outcomes between with and without PFOA. There was no significant difference of age, BMI, gender, OKS, FJS and other variables between PFOA and Non-PFOA group. After more than 5 years follow-up, UKA patients with or without PFOA could all achieve a satisfactory improvement of OKS, VAS and FJS score. ROM of the replaced knee increased from preoperative 110° to 130°. 74.3% (78/105) and 75.0% (174/232) patients have no change of K-L grade in PFOA and Non-PFOA group, OKS, FJS, VAS score and ROM were also comparable in all patients and no significant outcomes difference were found between two group. The presence of patellofemoral joint osteoarthritis and anterior knee pain should not be considered to be contraindications to medial fixed-bearing UKA.     

RETRACTED ARTICLE: Unicompartmental knee arthroplasty: a review of literature

There has been a resurgence of interest in unicompartmental knee arthroplasty (UKA) for treatment of medial unicompartmental knee osteoarthritis (OA). Improved prosthetic design, minimally invasive surgical techniques, and strict patient selection criteria have resulted in improved survivorship and functional outcomes. A review of orthopedic literature was conducted regarding the advantages of UKA versus total knee arthroplasty (TKA), UKA indications, survivorship, conversion of UKA to TKA, rehabilitation, and outcomes. The UKA appears to be a viable option for patients with knee medial compartment OA, including younger and active patients. Survivorship rates of 94% to 97% at 10 years have been reported.     

The incidence and risk factors of contralateral knee arthroplasty after primary unilateral unicompartmental knee arthroplasty

Unicompartmental knee arthroplasty (UKA) is one of the commonly used surgical methods for unicompartmental osteoarthritis in recent years. Although the prognosis of the operated knee has been widely studied, there are relatively little data on the natural history of the contralateral knee after unilateral replacement. The aim of this study was to explore the incidence and risk factors of consequential knee arthroplasty in patients with bilateral knee osteoarthritis (KOA) after receiving primary unilateral UKA, so as to provide a theoretical basis for making a more comprehensive treatment strategy for patients with KOA.We conducted a retrospective study and enrolled patients with bilateral KOA received unilateral UKA from June 2015 to December 2019 in the third department of joint orthopedics, the third hospital of Hebei Medical University. The patients were divided into replacement group and non-replacement group according to whether the contralateral knee joint received knee arthroplasty. Information about treatment of contralateral knee joint was collected from medical records to determine the incidence. Univariate analysis and multivariate logistic regression analysis were performed to identify the independent risk factors.A total of 502 patients were enrolled in this study. The incidence of contralateral knee arthroplasty was 38.64%. In the univariate analysis, vertical angle of mechanical axis, knee joint''s internal and external joint space, Kellgren–Lawrence (K-L) classification, femoral tibial angle were the significant risk factors for contralateral knee arthroplasty. In the multivariate model, only vertical angle of mechanical axis ≥3.03° (odds ratio [OR] 4.36, 95% confidence interval [CI], 2.47–9.11), K-L classification grades 3 and 4 (OR 2.46,3.72; 95%CI, 1.31–4.25, 1.98–6.87), and femoral tibial angle ≥187.32° (OR 6.32, 95%, 2.23–18.87) remained associated with the occurrence of knee arthroplasty.About a quarter of patients with bilateral KOA received unilateral UKA will receive contralateral knee arthroplasty. Higher K-L classification, femoral tibial angle, and mechanical axis vertical angle are identified risk factors.     

German short musculoskeletal function assessment questionnaire (SMFA-D): comparison with the SF-36 and WOMAC in a prospective evaluation in patients with primary osteoarthritis undergoing total knee arthroplasty

In a prospective clinical trial, the German short musculoskeletal function assessment (SMFA-D), the short form (SF)-36, and the Western Ontario and McMaster Universities osteoarthritis index (WOMAC) were evaluated in 63 patients with primary osteoarthritis undergoing total knee arthroplasty. All instruments were sensitive to change, demonstrating the effect of total knee arthroplasty at 1-year follow-up. The SMFA-D effect sizes in comparable scales were bigger than in the SF-36 and similar to those of the WOMAC. Significant correlations of the SMFA-D indices with the SF-36 and WOMAC scales preoperatively could be shown. After 1-year follow-up, all correlations between the SMFA-D indices and SF-36 scales were significant. In other comparison, only the correlation between the SMFA-D function index and the WOMAC function scales remained significant. The correlation of the SMFA-D function index with external validation criteria was higher than that using the other instruments. We recommend the SMFA-D for assessing change in functional status of patients with primary osteoarthritis of the knee following arthroplasty.     

Mid-term clinical outcome of constrained condylar knee prosthesis for patients with rheumatoid arthritis

Abstract

Objectives: This study retrospectively investigated the mid-term outcome of Legacy constrained condylar knee (LCCK) prosthesis in patients with rheumatoid arthritis (RA) having severe varus/valgus deformity, instability, and/or bone loss.

Methods: Between January 2000 and December 2015, LCCK prostheses had been performed in 32 knees of 25 patients with RA, and 23 knees of 17 patients of the postoperative follow-up minimum 2 years were analyzed in this study (Primary: 14 knees, Revision: 9 knees). The average of follow-up duration was 6.9?±?2.7 years, all were female, and the average of age and RA duration at the surgery was 59.0?±?9.5 years and 26.6?±?13.5 years, respectively. Clinical result was analyzed by Knee Society Score (KSS) knee and function at preoperative time and final visit. Imaging outcome was investigated by femoral tibial angle (FTA), four component alignment angles, and radiolucent line at pre-/postoperative time.

Results: KSS knee/function scores and radiographic FTAs were improved after operation. Radiolucent lines around components were seen in 17 knees (73.9%), of which only one knee (4.3%) has shown aseptic loosening. The seven-year Kaplan-Meier survivorship analysis resulted in 91.7%.

Conclusion: LCCK prosthesis in RA patients was achieved to the excellent mid-term clinical and radiographic result.     

Unicompartmental knee arthroplasty is superior to high tibial osteotomy for the treatment of medial unicompartmental osteoarthritis: A systematic review and meta-analysis

Background:Unicompartmental knee arthroplasty (UKA) and high tibial osteotomy (HTO) are widely used for the treatment of medial unicompartmental knee osteoarthritis (OA). However, the best approach remains controversial. This study aimed to present a systematic review and a meta-analysis to directly compare the clinical outcomes between HTO and UKA. We hypothesized that the clinical outcomes after UKA and HTO would be similar.Methods:Electronic databases (Web of Science, PubMed, Embase, CENTRAL, and Biosis Preview) were searched for related studies published before November 30, 2021. Retrospective and prospective studies that directly compared the postoperative outcomes between UKA and HTO were included. Odds ratio (ORs) and 95% confidence interval (CIs) for complications, revision to total knee arthroplasty (TKA), and weighted mean difference (MD) and 95% CIs in range of motion (ROM), pain, walking speed and function score were evaluated. Two reviewers independently assessed the quality of the studies. Subgroup and sensitivity analyses were performed to explore the heterogeneity.Results:Twenty-three retrospective and 6 prospective studies were included. A total of 3004 patients (3084 knees) were evaluated for comparison. Complications (OR, 4.88, 95% CI: 2.92–6.86) were significantly greater in the HTO group than in the UKA group. Postoperative function scores including Lysholm score (MD, −2.78, 95% CI: −5.37 to −0.18) and Hospital for Special Surgery (HSS) score (MD, −2.80, 95% CI: −5.39 to −0.20) were significantly lower in the HTO group than the UKA group. The postoperative ROM was similar between HTO and mobile-bearing UKA (MD, −3.78, 95% CI: −15.78 to 8.22). However, no significant differences were observed between the HTO and UKA group in terms of postoperative pain, walking speed, and revision to TKA.Conclusions:UKA is superior to HTO in minimizing complications and enhancing postoperative function scores. Mobile-bearing UKA has a similar ROM compared with HTO. Both HTO and UKA provide satisfactory clinical outcomes in terms of walking speed, relieving pain, and revision to TKA. UKA appears to be more suitable for the elderly, and both mobile-bearing UKA and HTO are viable surgical options for younger active individuals.     

Unilateral versus bilateral primary knee osteoarthritis: Relation to the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC), C-reactive protein and radiological assessment in Egyptian patients

Aim of the workTo study the differences between unilateral and bilateral knee osteoarthritis (KOA) patients in relation to the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC), C-reactive protein (CRP) and radiological assessment.Patients and methodsThe study included 80 primary KOA patients subgrouped into those with unilateral or bilateral condition according to the X-ray. WOMAC scale and body mass index (BMI), waist (WC) and thigh (TC) circumferences were measured. The CRP and lipid profile were evaluated and plain X-ray knees assessed by Kellgren and Lawerence (KL) grade.ResultsPatients mean age was 50 ± 9.8 years, disease duration 4 ± 3 years and were 61 females and 19 males. Mean BMI was 32 ± 6.6, WC 96 ± 20 cm, TC 56 ± 11.5 cm, WOMAC 43 ± 14 and KL grade 2 ± 0.9. Unilateral knee was detected in 28 (35%) and was bilateral in 52 (65%) patients. Highest pain was detected in female patients on using stairs and was significant on weight-bearing (p = 0.004), but going downstairs and the KL grade were significantly more in males (p = 0.004 and p = 0.03 respectively). The WOMAC pain subscale items and KL grading were significantly increased in patients with bilateral KOA. The WOMAC significantly correlated with the BMI, WC, TC, lipid profile and KL grade (p < 0.0001 for all). On regression, only the disease duration and cholesterol levels were predictors of WOMAC score (β = 0.2, p = 0.04 and β = 0.29, p = 0.03 respectively).ConclusionsPain on weight bearing in females and bending activities especially going downstairs (in males) appears early with primary KOA. Bilateral involvement is more painful with more radiographic severity.     

Neuropathic pain in Egyptian patients with primary knee osteoarthritis: Relationship with functional status and radiological severity

Aim of the workThe present study was conducted to identify the frequency of neuropathic pain (NP) and its relationship with functional status and radiological severity in a series of Egyptian patients with primary knee osteoarthritis (OA).Patients and methodsThe study included 165 patients with primary KOA. Visual analogue scale (VAS)-pain was estimated and the Western Ontario and McMaster (WOMAC) Universities osteoarthritis index was used for assessment of pain, stiffness and physical function, Douleur Neuropathique in 4 questions (DN4) questionnaire was used to assess NP and Kellgren-Lawrence (KL) radiological grading was used to assess OA severity.ResultsThe mean age of the patients was 53.08 ± 6.95 years, were 144 females and 21 males, 23 were employed, body mass index was 24.87 ± 1.91 and total WOMAC was 44.24 ± 16.52. The mean DN4 score was 2.81 ± 1.27. 29 (17.6%) patients had NP. The mean symptom duration was significantly longer in patients with NP (50.9 ± 14.58 months) compared to those without (36.53 ± 25.25 months) (p = 0.008). The VAS-pain and WOMAC score were significantly increased in patients with NP compared to those without (p < 0.001) while the KL was comparable. The DN4 questionnaire significantly correlated with VAS-pain at rest (r = 0.56, p = 0.002); and with WOMAC pain subscale (r = 0.38, p = 0.043).ConclusionA relevant proportion of KOA patients have NP and is remarkably related to the disease duration. Functional capacity is adversely affected in these patients. However, no relation was found between DN4 questionnaire and the radiological severity. Once detected, suitable treatment options for NP should be included in the management of primary KOA.     

Changes in physical activity and health-related quality of life during the first year after total knee arthroplasty

Objective

Despite its impact on the overall outcome and health‐related quality of life (HRQOL) after knee surgery, physical activity has not been investigated directly using accelerometry or step monitoring during the first year after total knee arthroplasty (TKA) due to osteoarthritis (OA). Therefore, the present study aimed to evaluate the development of physical activity over 12 months after surgery and its relationship to clinical outcome and HRQOL.

Methods

Fifty‐three patients scheduled for primary TKA due to OA were measured with the DynaPort ADL monitor and a step activity monitor preoperatively and at 2, 6, and 12 months of followup. Clinical outcome and HRQOL were investigated using the American Knee Society Score (KSS) and Short Form 36 (SF‐36) health survey.

Results

Physical activity increased significantly within 12 months of followup (from mean ± SD 4,993 ± 2,170 gait cycles preoperatively to 5,932 ± 2,111 gait cycles; P = 0.003). Clinical outcome and HRQOL improved from baseline (mean ± SD KSS 88.9 ± 21.4, mean ± SD SF‐36 43.1 ± 18.4) to 12 months of followup (mean ± SD KSS 188.6 ± 10.9; P = 0.001 and mean ± SD SF‐36 82.5 ± 15.9; P = 0.001). Physical activity parameters did not correlate with clinical outcome.

Conclusion

TKA offers profound improvements of physical activity for the majority of patients. Despite these improvements and the excellent clinical outcome, most patients do not reach the level of physical activity reported for healthy subjects. The activity level after treatment seems to be influenced by physical activity behavior prior to surgery rather than by the treatment itself.