AIM: To summarise and compare currently available evidence regarding accuracy of pre-operative imaging, which is one of the key choices for surgeons contemplating patient-specific instrumentation(PSI) surgery.METHODS:...AIM: To summarise and compare currently available evidence regarding accuracy of pre-operative imaging, which is one of the key choices for surgeons contemplating patient-specific instrumentation(PSI) surgery.METHODS: The MEDLINE and EMBASE medical literature databases were searched, from January 1990 to December 2013, to identify relevant studies. The data from several clinical studies was assimilated to allow appreciation and comparison of the accuracy of each modality. The overall accuracy of each modality was calculated as proportion of outliers > 3% in the coronal plane of both computerised tomography(CT) or magnetic resonance imaging(MRI). RESULTS: Seven clinical studies matched our inclusion criteria for comparison and were included in our study for statistical analysis. Three of these reported series using MRI and four with CT. Overall percentage of outliers > 3% in patients with CT-based PSI systems was 12.5% vs 16.9% for MRI-based systems. These results were not statistically significant. CONCLUSION: Although many studies have been undertaken to determine the ideal pre-operative imaging modality, conclusions remain speculative in the absence of long term data. Ultimately, information regarding accuracy of CT and MRI will be the main determining factor. Increased accuracy of pre-operative imaging could result in longer-term savings, and reduced accumulated dose of radiation by eliminating the need for post-operative imaging and revision surgery.展开更多
文摘目的比较3D打印截骨导板(patient-specific instruments,PSI)辅助全膝关节置换术(total knee arthroplasty,TKA)、传统TKA治疗原发性重度膝骨性关节炎的近期疗效以及围术期失血量差异。方法原发性重度膝骨性关节炎患者87例(87膝),57例行传统TKA者为对照组,30例行PSI辅助TKA者为观察组。比较2组手术时间、住院时间、围术期总失血量、术中出血量、隐性失血量;分别于术前1d及术后3个月评定美国膝关节协会评分(Knee Society Score,KSS)和膝关节活动度(range of motion,ROM);记录随访期间并发症发生情况。结果观察组手术时间[(54.80±9.11)min]较对照组[(77.92±21.60)min]短(P<0.05),住院时间[(5.12±1.36)d]与对照组[(5.08±1.14)d]比较差异无统计学意义(P>0.05)。观察组、对照组术后3个月KSS[(83.12±2.50)、(81.96±5.30)分]较术前[(53.65±5.38)、(51.38±3.05)分]增高,膝关节ROM[(115.18±5.78)°、(115.42±4.93)°]较术前[(91.82±12.06)°、(88.67±12.01)°]增大(P<0.05),2组术后3个月KSS、膝关节ROM比较差异无统计学意义(P>0.05)。观察组术中出血量[(41.65±6.56)mL]较对照组[(48.63±10.70)mL]少(P<0.05),围术期总失血量[(883.78±284.18)mL]、隐性失血量[(843.95±253.61)mL]与对照组[(977.15±342.01)、(936.38±331.75)mL]比较差异无统计学意义(P>0.05)。观察组术后发生切口渗血1例,对照组术后异体输血1例,余病例均无并发症发生。结论原发性重度膝骨性关节炎患者行PSI辅助TKA治疗,可获得与传统TKA相近的近期疗效,且可缩短手术时间、减少术中出血量。
文摘AIM: To summarise and compare currently available evidence regarding accuracy of pre-operative imaging, which is one of the key choices for surgeons contemplating patient-specific instrumentation(PSI) surgery.METHODS: The MEDLINE and EMBASE medical literature databases were searched, from January 1990 to December 2013, to identify relevant studies. The data from several clinical studies was assimilated to allow appreciation and comparison of the accuracy of each modality. The overall accuracy of each modality was calculated as proportion of outliers > 3% in the coronal plane of both computerised tomography(CT) or magnetic resonance imaging(MRI). RESULTS: Seven clinical studies matched our inclusion criteria for comparison and were included in our study for statistical analysis. Three of these reported series using MRI and four with CT. Overall percentage of outliers > 3% in patients with CT-based PSI systems was 12.5% vs 16.9% for MRI-based systems. These results were not statistically significant. CONCLUSION: Although many studies have been undertaken to determine the ideal pre-operative imaging modality, conclusions remain speculative in the absence of long term data. Ultimately, information regarding accuracy of CT and MRI will be the main determining factor. Increased accuracy of pre-operative imaging could result in longer-term savings, and reduced accumulated dose of radiation by eliminating the need for post-operative imaging and revision surgery.
