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Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_15 | Pages 77 - 77
1 Dec 2021
Hill D Pinger C Noland E Morton K Hunt AA Pensler E Cantu S Attar P Siddiqi A
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Aim

Identifying the optimal agent for irrigation for periprosthetic joint infection remains challenging as there is limited data. The ideal solution should have minimal cytotoxicity while maintaining bactericidal activity. We developed a novel activated-zinc solution containing zinc-chloride (ZnCl2) and sodium-chlorite (NaClO2). The purpose of this study was 1.) to investigate the antimicrobial efficacy of 2 concentrations (“CZ1”, “CZ2”) against Staphylococcus aureus and Pseudomonas aeruginosa and 2.) to evaluate untoward effects of the solution on local wound tissue 24 hours after solution exposure in pig wound models.

Method

The study was conducted and reported in accordance to ARRIVE guidelines. We created twenty-four 1.5cm wounds on the back of a Yorkshire-cross pig. Wounds were inoculated with standardized Pseudomonas and S. aureus. 8 wounds were designated as controls (inoculum without treatment), 8 treated with CZ1, and 8 with CZ2. Punch biopsies were taken 1 hour after treatment and bacteria quantified. Wound necrosis/neutrophil infiltrate was measured 24-hours post-exposure.


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_12 | Pages 11 - 11
1 Oct 2018
Klement MR Luzzi AJ Siddiqi A Valichka K Sharkey PF
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Introduction

Recovery after total knee arthroplasty (TKA) may take longer than patients expect. Furthermore, there are a subset of patients who still experience pain and dissatisfaction despite normal physical examination, radiographs, and laboratory analysis. Corticosteroid injection (CSI) is commonly used nonsurgical treatment for painful knee arthritis. However, the efficacy of CSI in patients with a painful TKA remains unknown.

Methods

A retrospective charge review was performed to identify a cohort of patients who had a primary TKA performed between 2015 and 2016 and later received a CSI. All TKAs and CSIs were performed by a fellowship-trained arthroplasty surgeon. Patients receiving a CSI underwent a clinical exam, laboratory analysis to rule out infection, and radiographic evaluation prior to injection. Patient variables were recorded and a survey assessed the efficacy of the injection. The survey response rate was 63.6%.


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_22 | Pages 33 - 33
1 Dec 2017
Siddiqi A Restrepo C Parvizi J
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Aim

Diagnosis of periprosthetic joint infection (PJI) presents a real challenge in some patients. Batteries of tests are available to reach this diagnosis. It is unknown if blood cultures have any role in diagnosis of PJI. The objective of this study was to evaluate whether blood cultures, taken in a group of patients with PJI, was useful in identifying the infecting pathogen.

Methods

The institutional database was used to identify all patients treated at our institution between 2000 – 2015 for PJI according to the latest MSIS criteria. There were a total of 864 patients with mean age of 68 years. Synovial fluid sample and/or deep tissue samples were analyzed and cultured in all of these patients. In 371 (42.9%) patients with PJI, blood cultures were also taken. Statistical analyses were performed for correlation purposes.