NYU Langone Health, New York, USA.
J Orthop Surg Res. 2022 Jan 22;17(1):42. doi: 10.1186/s13018-022-02942-8.
Image-guided joint aspirations used to assist the diagnosis of periprosthetic joint infection (PJI) may commonly result in a dry tap-or insufficient fluid for culture and cell count analysis. Dry tap aspirations are painful and invasive for patients and often utilize a subsequent saline lavage to obtain a microbiology sample. Currently, there is a paucity of the literature addressing predictors that could suggest whether a dry tap will occur. The purpose of this study was to examine the effects of various factors on "dry tap" occurrence in patients with suspected PJI following total hip arthroplasty (THA).
A retrospective review was performed among THA patients suspected for PJI who received image-guided joint aspiration procedures at our institution from May 2016 to February 2020. The procedural factors included the imaging modality used for aspiration, anatomic approach, needle gauge size used, and the presence of a trainee. The patient-specific factors included number of prior ipsilateral hip surgeries, femoral head size, ESR/CRP values, and BMI.
In total, 336 patients met our inclusion criteria. One hundred and twenty hip aspirations resulted in a dry tap (35.7%) where the patients underwent a saline lavage. Among the procedural and patient-specific factors, none of the factors were found to be statistically different between the two cohorts nor conferred any greater odds of a dry tap occurring.
No associations with dry tap occurrence were found among the procedural and patient-specific factors studied. Further research is needed to identify additional factors that may be more predictive of dry taps.
影像引导下的关节抽吸术常用于辅助诊断假体周围关节感染（PJI），但常导致“干抽”——即抽吸物不足以进行培养和细胞计数分析。干抽对患者来说既痛苦又具侵袭性，通常需要进行后续的生理盐水灌洗以获取微生物样本。目前，文献中对于哪些因素可能预示干抽的发生，缺乏相关内容。本研究旨在探讨各种因素对全髋关节置换术后疑似 PJI 患者发生“干抽”的影响。
我们对 2016 年 5 月至 2020 年 2 月在我院接受影像引导关节抽吸术的疑似 PJI 的 THA 患者进行了回顾性研究。手术因素包括抽吸时使用的影像学方法、入路方式、使用的针号大小以及是否有实习生参与。患者因素包括同侧髋关节手术次数、股骨头大小、ESR/CRP 值和 BMI。
共有 336 名患者符合纳入标准。其中 120 髋的抽吸结果为干抽（35.7%），随后进行了生理盐水灌洗。在手术因素和患者因素中，没有一个因素在两组之间存在统计学差异，也没有一个因素与干抽的发生有更大的关联。
在所研究的手术因素和患者因素中，均未发现与干抽发生相关的因素。需要进一步研究以确定哪些因素可能更能预测干抽的发生。
