Use of Triggers to Detect Adverse Events After Outpatient Orthopedic Surgery at a Single Ambulatory Surgery Center.

Literature on adverse events (AEs) after outpatient orthopedic surgery is relatively sparse, and efforts to detect, measure, and track AEs after outpatient surgery lag behind those for the inpatient setting. Detection of AEs has traditionally relied on patient safety indicators (from billing data) and self-reporting, but these methods have been shown to have low sensitivity, missing up to 90% of AEs. There is growing recognition that the trigger method, which uses "triggers" as red flags to initiate more detailed chart audits, can serve as a more sensitive alternative to detect AEs. Moreover, the recent widespread adoption of electronic health records (EHRs) can provide faster automated methods for identifying triggers and estimating AE rates. This study evaluates the ability of 6 separate EHR-based triggers to predict AEs after outpatient orthopedic surgery and compares this trigger method with AE self-reporting. Triggers have the potential to decrease postoperative morbidity after outpatient orthopedic surgery and may lead to quality improvement. Further research is needed to qualify triggers as screening tools in the outpatient setting. [Orthopedics. 2022;45(2):116-121.].

Radiologic Measurements in the Assessment of Patellar Instability: A Systematic Review and Meta-analysis.

BACKGROUND: Numerous diagnostic imaging measurements related to patellar instability have been evaluated in the literature; however, little has been done to compare these findings across multiple studies. PURPOSE: To review the different imaging measurements used to evaluate patellar instability and to assess the prevalence of each measure and its utility in predicting instability. We focused on reliability across imaging modalities and between patients with and without patellar instability. STUDY DESIGN: Systematic review; Level of evidence, 4. METHODS: We performed a systematic review of the literature using the PubMed, SCOPUS, and Cochrane databases. Each database was searched for variations of the terms "patellar instability," "patellar dislocation," "trochlear dysplasia," "radiographic measures," "computed tomography," and "magnetic resonance imaging." Studies were included if they were published after May 1, 2009, and before May 1, 2019. A meta-analysis using a random effects model was performed on several measurements, comparing instability and control groups to generate pooled values. RESULTS: A total of 813 articles were identified, and 96 articles comprising 7912 patients and 106 unique metrics were included in the analysis. The mean patient age was 23.1 years (95% CI, 21.1-24.5), and 41% were male. The tibial tubercle-trochlear groove (TT-TG) distance was the most frequently included metric (59 studies), followed by the Insall-Salvati ratio and Caton-Deschamps index (both 26 studies). The interobserver intraclass correlation coefficients were excellent or good for the TT-TG distance and Insall-Salvati ratio in 100% of studies reporting them; however, for the Caton-Deschamps index and Blackburne-Peel ratio, they were excellent or good in only 43% and 40% of studies. Pooled magnetic resonance imaging values for TT-TG distance (P < .01), Insall-Salvati ratio (P = .01), and femoral sulcus angle (P = .02) were significantly different between the instability and control groups. Values for tibial tubercle-posterior cruciate ligament distance (P = .36) and Caton-Deschamps index (P = .09) were not significantly different between groups. CONCLUSION: The most commonly reported measurements for evaluating patellar instability assessed patellar tracking and trochlear morphology. The TT-TG distance was the most common measurement and was greater in the patellar instability group as compared with the control group. In addition, the TT-TG, tibial tubercle-posterior cruciate ligament, and patellar tendon-trochlear groove distances were highly reproducible measurements for patellar tracking, and the Insall-Salvati ratio had superior reproducibility for assessing patellar height.

Clinical Outcomes of Eyes With Diabetic Macular Edema Switched From Aflibercept to Ranibizumab Therapy.

BACKGROUND AND OBJECTIVE: In 2018, cases of inflammation were reported after intravitreal aflibercept (IVA), which resulted in switches to intravitreal ranibizumab (IVR). The authors' purpose was to evaluate outcomes after switching from IVA to IVR in diabetic macular edema (DME). PATIENTS AND METHODS: Retrospective cohort study. Eyes switched from IVA to IVR for treating DME were included. Data were gathered from three visits before to three visits post-switch. Outcome measures included central subfoveal thickness (CFT) and Snellen visual acuity (VA). RESULTS: There was a statistically significant increase in CFT at the first visit (325 µm ± 234 µm; P = .006) compared to the switch visit, but no difference later visits (268 µm ± 103 µm; P = .32; 284 µm ± 118 µm; P = .11; n = 54). There was no statistically significant change in mean logarithm of the minimum angle of resolution VA between the switch and later visits (0.43 ± 0.38, P = .95; 0.38 ± 0.30, P = .12; 0.41 ± 0.37, P = .69). CONCLUSIONS: The authors observed transient worsening of macular edema in eyes treated for DME when switched from aflibercept to ranibizumab. [Ophthalmic Surg Lasers Imaging Retina. 2020;51:691-697.].