Effect of motor imagery on knee function after unicompartmental knee arthroplasty / 中国康复理论与实践

ObjectiveTo explore the effect of motor imagery (MI) on knee function after unicompartmental knee arthroplasty (UKA). MethodsFrom January to September, 2022, 32 patients underwent UKA for the first time in Xuanwu Hospital were randomly divided into control group (n = 16) and experimental group (n = 16). All the patients accepted routine rehabilitation, and the experimental group accepted MI in addition, until four weeks after discharge. They were assessed with Oxford Knee Score (OKS), Visual Analogue Scale for pain (VAS), range of motion (ROM) of knee, and Timed Up and Go Test (TUGT) before and after treatment. ResultsAll the indexes improved after treatment (|t| > 2.517, P < 0.05), except ROM in the control group; and they improved more in the experimental group than in the control group (F > 7.999, P < 0.01), except the VAS score. ConclusionMI can further improve the knee function after UKA, but do less for pain.

Effects of integrated orthopedic rehabilitation pathway on motor function after total knee arthroplasty / 中国康复理论与实践

@#Objective To study the effects of integrated orthopedic rehabilitation pathway on motor function in six months after total knee arthroplasty (TKA), including pain, stiffness, range of motion and muscle strength, etc. Methods From March, 2016 to March, 2019, 180 patients who underwent TKA and treated with integrated orthopedic rehabilitation pathway were enrolled. Age, gender, operation time, time of follow-up, the scores of Hospital for Special Surgery-Knee Scale (HSS-KS) and Western Ontario and McMaster Universities osteoarthritis index (WOMAC) at preoperative/postoperative/one-month after operation/three-month after operation/six-month after operation time points were collected. The sub items, such as muscle strength, range of motion, flexion deformity, pain, stiffness, functional difficulty were primarily focused on. Results A total of 42 patients were followed up for three months and 22 patients were followed up for six months. There was no significant difference in the scores of HSS-KS and WOMAC before and after operation (P > 0.05). Within three months after operation, the HSS-KS scores gradually increased (P < 0.05) and the WOMAC scores gradually decreased (P < 0.05). The active knee flexion range of motion and knee extensor muscle strength scores of HSS-KS significantly decreased after operation (P < 0.05), and gradually recovered one month and three months after operation (P < 0.05). The flexion deformity scores of HSS-KS increased after operation (P < 0.05), decreased one month after operation (P < 0.05), and got a trend of incensement again three months after operation. The pain score of WOMAC decreased continuously within three months after operation (P < 0.05); the stiffness score of WOMAC did not change after operation (P > 0.05), decreased significantly one month after operation (P < 0.05), and did not change three months after operation (P > 0.05). The degree of functional difficulty of WOMAC decreased after operation (P < 0.05), and improved continuously within six months after operation (P < 0.05). Conclusion The overall function after TKA shows a trend of improvement within three months, and there is no obvious improvement from three to six months after operation. The flexion deformity score showed a downward trend in one month after operation, and it could be improved again after strengthening rehabilitation, which needs more attention in the postoperative rehabilitation.

Advance of head taper corrosion after metal on polyethylene total hip arthroplasty / 中华骨科杂志

Total hip arthroplasty is currently an important surgical method for the treatment of hip diseases.The modular design of the head and neck taper facilitates the adjustment of limb length and femoral offset during surgery,however,complications such as wear,corrosion and looseness of the modular interface are also inevitable old problems.In recent years,with the changes in the design of prostheses,the trend that patients becomes younger and active,and the development of minimally invasive surgery,taper corrosion has again become a problem that needs to be solved and cannot be ignored,which is causing the attention of joint surgeons.There have been many studies on the complications associated with metal-on-metal prosthesis modular interfaces,such as increased metal ion level,taper corrosion and adverse local tissue reactions,while there are few studies on the complications of metal-on-polyethylene total hip arthroplasty,and metal-on-polyethylene prosthesis has similar problems such as increased local metal ion level and adverse tissue reactions caused by taper corrosion,which may also lead to complications such as prosthesis loosening,dislocation and fracture.Currently there are few reports about head and neck taper corrosion of metal-onpolyethylene prosthesis in China and there are still controversies about its manifestation and mechanism.In this paper,we summarized the above problems through literature reviewto expound the concept,research history,assessment methods,and incidence of metal-on-polyethylene prosthesistaper corrosion and the effect of material composition,diameter of the metal head,neck length,femoral offset,geometry of the taper,surgical factors,in vivo time,and patient factors on taper corrosion are analyzed.In summary,there are still many problems in the researches about the specific forming mechanism that have not been solved,thus it is very important for the prevention of taper corrosion:choosing the same material or ceramic material,avoiding overlarge diameter of the femoral head and femoral offset,avoiding too small taper degree,paying attention to the strength of tapping and cleaning of the taper are the current viable options.

Advance of head taper corrosion after metal on polyethylene total hip arthroplasty / 中华骨科杂志

Total hip arthroplasty is currently an important surgical method for the treatment of hip diseases. The modular design of the head and neck taper facilitates the adjustment of limb length and femoral offset during surgery, however, complications such as wear, corrosion and looseness of the modular interface are also inevitable old problems. In recent years, with the changes in the design of prostheses, the trend that patients becomes younger and active, and the development of minimally invasive surgery, taper corrosion has again become a problem that needs to be solved and cannot be ignored, which is causing the attention of joint surgeons. There have been many studies on the complications associated with metal-on-metal prosthesis modular interfaces, such as increased metal ion level, taper corrosion and adverse local tissue reactions, while there are few studies on the complications of metal-on-polyethylene total hip arthroplasty, and metal-on-polyethylene prosthesis has similar problems such as increased local metal ion level and adverse tissue reactions caused by taper corrosion, which may also lead to complications such as prosthesis loosening, dislocation and fracture. Currently there are few reports about head and neck taper corrosion of metal-on-polyethylene prosthesis in China and there are still controversies about its manifestation and mechanism. In this paper, we summarized the above problems through literature reviewto expound the concept, research history, assessment methods, and incidence of metal-on-polyethylene prosthesistaper corrosion and the effect of material composition, diameter of the metal head, neck length, femoral offset, geometry of the taper, surgical factors, in vivo time, and patient factors on taper corrosion are analyzed. In summary, there are still many problems in the researches about the specific forming mechanism that have not been solved, thus it is very important for the prevention of taper corrosion: choosing the same material or ceramic material, avoiding overlarge diameter of the femoral head and femoral offset, avoiding too small taper degree, paying attention to the strength of tapping and cleaning of the taper are the current viable options.

Hidden blood loss following total knee arthroplasty: an analysis of influential factors / 中华创伤杂志

Objective To study the characteristic and influential factor of the hidden blood loss after total knee arthroplasty (TKA) so as to provide a reference frame for clinical work. Methods There were 75 patients with osteoarthritis of the knee who were operated with unilateral primary TKA. The patients including 21 males and 54 females at a mean age of 68.7 years were retrospectively analyzed.The perioperative blood loss and the hidden blood loss following TKA were calculated by Gross formula. It was analyzed that if the perioperative blood loss and the hidden blood loss following TKA were affected by gender, haemostasis during operation with deflating tourniquet and reinfusion of the drained blood. Results The preoperative blood loss was (1551.3 ± 369.6) ml and the hidden blood loss was (792.3 ±228.6) ml. The hidden blood loss of male was significantly higher than that of female (P ＜ 0.05). The hidden blood loss was reduced by haemostasis during operation with deflating tourniquet (P ＜ 0.05) but was not affected by postoperative shed blood reinfusion. Conclusions The lowest value of Hct is a representative parameter for calculation of the hidden blood loss. There is no significant difference between male and female about the relative hidden blood loss. Haemostasis during operation with deflating tourniquet can reduce teh hidden blood loss but not affect the total perioperative blood loss. Reinfusion of the drained blood can reduce the transfusion rate but does not affect the total preoperative blood loss and the hidden blood loss.

Analysis on complications after treatment of unstable femoral intertrochanteric fractures with proximal femoral intramedullary nail in the elderly / 中华创伤杂志

Objective To analyze causes for complications after proximal femoral intramedullary nail treating unstable femoral intertrochanteric fractures in the elderly.Methods A total of 172 cases of unstable intertrochanteric fractures treated with proximal femoral intramedullary nail from December 2001 to May 2007 were reviewed upon postoperative complications to find out the causes for complications and discuss countermeasures.Results Of all, 149 cases were followed up for 6-42 months(mean 18. 5 months), which showed excellence rate of 89. 0% in aspect of functional recovery of the hip. Postoper-ative systemic complications occurred in 26 cases and local complications in 21.Condusions Proxi-real femoral intramedullary nail can be used in most elderly patients with unstable intertrochanteric frac-tures. A thorough evaluation of physiological function, treatment of preoperative comorbidities and aug-mentation of surgical technique are prerequisites for operation safety and decrease of complications.

Operative risk factors assessment for 65 years or elder orthopaedic patients / 中国矫形外科杂志

[Objective]To study those risk factors that are associated with adverse postoperative outcomes in old orthopaedic patients.[Method]In Xuanwu Hospital,medical records of 65 years or elder orthopaedic patients in-hospital from January 2002 to October 2004 were reviewed.Take the potential preoperative risk factors associated with adverse postoperative outcomes as variates ,postoperative adverse outcomes as dependent variates.Data were analyzed with SPSS for Windows 11.5.[Result]In the study,the postoperative mortality rate was 3.5%.13.6% of these patients developed one or more complications.American Society of Anesthesiologists (ASA) classification,abnormal cardiac function, abnormal renal function and weak condition of consciousness are the most important risk factors of postoperative mortality,abnormal cardiac function,arrhythmia,ASA classification,poor eating status and operative degree increase the incidence of postoperative complication.[Conclusion]The study demonstrates that there are good postoperative outcomes in most of geriatric orthopaedic patients.But in some degree,there exist the postoperative morbidity (13.6%) and mortality (3.5%).Among operative risk factors,preoperative general status and functional status much influence the postoperative outcomes.