Clinical trial NCT03126448: BBOT: Bacterial Burden in Ortho Trauma Procedures
Official title: Prospective Evaluation of Bacterial Burden in Orthopaedic Trauma Procedures Using Highly Sensitive Assays
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Orthopaedic Trauma Infections
Keywords: Infection
Nonunion
Fracture healing
Lead sponsor: University of Maryland, Baltimore
Sponsor class: OTHER
First posted: 2017-04-24
Enrollment: 142
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Primary purpose: DIAGNOSTIC

Brief summary: The purpose of this research project is to improve understanding of the potential role of highly sensitive bacterial tests in diagnosing infected non-healing fractures compared to the current standard of care, microbiologic culture (growing bacteria from tissue specimens in the laboratory).

In order to understand the validity of the highly sensitive tests, parameters of the test in different groups of patients must be established. This study is examining how two highly sensitive tests compare to each other and to the standard of care (microbiologic culture) in three groups of patients.

Group 1 is clean broken bone surgery undergoing plate and screw fixation, intramedullary nailing fixation where the fracture site is accessible, or staged treatment of a broken bones initially treated by joint spanning external fixation device. Group 2 will include patients having a plate and screws removed without clinical evidence of infection. Group 3 will be patients undergoing an initial procedure for fracture nonunion.

Detailed description: Infected, broken bones that do not heal are a difficult clinical problem that significantly affect patient quality of life. Current methodology for detecting bacteria (growth in laboratory cultures) is inadequate to detect infections caused by bacteria existing in a biofilm, which is the layer of "slime" found in the presence of foreign bodies (eg, implanted metal devices to fix broken bones). Advances in molecular biology have allowed development of highly sensitive tests to detect bacteria in the biofilm state. However, the limited prior research has not included control groups or compared the performance of different highly sensitive tests. To address these limitations and further define the role of highly sensitive bacterial tests in clinical practice, the investigators hypothesize that there will be increasing bacterial burden when comparing clean broken bone surgery (1st surgery) to implanted metal device removal (2nd surgery, bone healed) to index nonunion surgery (subsequent surgery, bone not healed) as measured by percentage of cases being positive for bacteria using highly sensitive bacterial tests. Further, the highly sensitive bacterial tests (Illumina MiSeq system and Ibis T5000 biosensor) will have similar ability to quantify the number of bacteria and differentiate bacterial species. Eligible patients will consist of three groups. Group 1 is clean broken bone surgery undergoing plate and screw fixation, intramedullary nailing fixation where the fracture site is accessible, or staged treatment of a broken bones initially treated by joint spanning external fixation device. Group 2 will include patients having a plate and screws removed without clinical evidence of infection. Group 3 will be patients undergoing an initial procedure for fracture nonunion. Tissue obtained at the time of surgery will be sent to the research laboratory for culture and performance of the two highly sensitive tests. The tissue samples taken will be tissue normally removed and discarded in the course of these particular procedures. The rates of positivity for culture and the highly sensitive tests will be compared amongst the three groups. Investigators will also compare bacterial count and the distribution of bacterial species found using the two highly sensitive tests. These data will then undergo statistical analysis against clinical data gathered from review of the patients' charts. The overall project goal is to establish the clinical relevance of highly sensitive bacterial tests in diagnosing infected nonunions. The ability to more accurately identify patients with infection may lead to a change in clinical decision making with respect to surgical procedure or antibiotic treatment. This project will develop an improved understanding of the potential role of highly sensitive bacterial tests in diagnosing infected nonunions compared to the current standard of care, which is growing bacteria in the laboratory under artificial conditions.

Eligibility criteria: Inclusion Criteria:

* Closed fracture undergoing open reduction internal fixation, intramedullary nailing (IMN) where the fracture site is accessible, or staged treatment of a pilon or plateau that was initially treated by joint spanning external fixation.
* Plate and screw removal without clinical evidence of infection
* Index procedure for fracture nonunion

Exclusion Criteria:

* Index fracture surgery for an open fracture or intramedullary nailing with fracture site not accessible
* Hardware removal if fracture not already healed
* Index nonunion surgery being bone grafting of a 'critical' defect
* Pregnant females

Primary outcomes:
measure: Number of Participants With Tissue Samples Identified With Bacterial DNA According to Highly Sensitive Bacterial Assays
timeFrame: Study surgery to 6-month clinical follow-up
Secondary outcomes:
Other outcomes:
Locations:
city: Baltimore
country: United States
facility: University of Maryland, Shock Trauma Center
state: Maryland
Study officials:
affiliation: University of Maryland, College Park
name: Robert V O'Toole, MD
role: PRINCIPAL_INVESTIGATOR
affiliation: University of Maryland, College Park
name: Mark Shirtliff, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Palmer MP, Altman DT, Altman GT, Sewecke JJ, Ehrlich GD, Hu FZ, Nistico L, Melton-Kreft R, Gause TM 3rd, Costerton JW. Can we trust intraoperative culture results in nonunions? J Orthop Trauma. 2014 Jul;28(7):384-90. doi: 10.1097/BOT.0000000000000043.
citation: Stucken C, Olszewski DC, Creevy WR, Murakami AM, Tornetta P. Preoperative diagnosis of infection in patients with nonunions. J Bone Joint Surg Am. 2013 Aug 7;95(15):1409-12. doi: 10.2106/JBJS.L.01034.
citation: Bose D, Kugan R, Stubbs D, McNally M. Management of infected nonunion of the long bones by a multidisciplinary team. Bone Joint J. 2015 Jun;97-B(6):814-7. doi: 10.1302/0301-620X.97B6.33276.
citation: Olszewski D, Streubel PN, Stucken C, Ricci WM, Hoffmann MF, Jones CB, Sietsema DL, Tornetta P 3rd. Fate of Patients With a "Surprise" Positive Culture After Nonunion Surgery. J Orthop Trauma. 2016 Jan;30(1):e19-23. doi: 10.1097/BOT.0000000000000417.
citation: Schottel PC, O'Connor DP, Brinker MR. Time Trade-Off as a Measure of Health-Related Quality of Life: Long Bone Nonunions Have a Devastating Impact. J Bone Joint Surg Am. 2015 Sep 2;97(17):1406-10. doi: 10.2106/JBJS.N.01090.
citation: Brinker MR, Hanus BD, Sen M, O'Connor DP. The devastating effects of tibial nonunion on health-related quality of life. J Bone Joint Surg Am. 2013 Dec 18;95(24):2170-6. doi: 10.2106/JBJS.L.00803.
citation: Hannigan GD, Hodkinson BP, McGinnis K, Tyldsley AS, Anari JB, Horan AD, Grice EA, Mehta S. Culture-independent pilot study of microbiota colonizing open fractures and association with severity, mechanism, location, and complication from presentation to early outpatient follow-up. J Orthop Res. 2014 Apr;32(4):597-605. doi: 10.1002/jor.22578. Epub 2014 Jan 3.
citation: Moussa FW, Anglen JO, Gehrke JC, Christensen G, Simpson WA. The significance of positive cultures from orthopedic fixation devices in the absence of clinical infection. Am J Orthop (Belle Mead NJ). 1997 Sep;26(9):617-20.
citation: Dobbins JJ, Seligson D, Raff MJ. Bacterial colonization of orthopedic fixation devices in the absence of clinical infection. J Infect Dis. 1988 Jul;158(1):203-5. doi: 10.1093/infdis/158.1.203. No abstract available.
citation: Jacovides CL, Kreft R, Adeli B, Hozack B, Ehrlich GD, Parvizi J. Successful identification of pathogens by polymerase chain reaction (PCR)-based electron spray ionization time-of-flight mass spectrometry (ESI-TOF-MS) in culture-negative periprosthetic joint infection. J Bone Joint Surg Am. 2012 Dec 19;94(24):2247-54. doi: 10.2106/JBJS.L.00210.
citation: Struijs PA, Poolman RW, Bhandari M. Infected nonunion of the long bones. J Orthop Trauma. 2007 Aug;21(7):507-11. doi: 10.1097/BOT.0b013e31812e5578.
citation: Motsitsi NS. Management of infected nonunion of long bones: the last decade (1996-2006). Injury. 2008 Feb;39(2):155-60. doi: 10.1016/j.injury.2007.08.032. Epub 2008 Jan 29.
citation: Firoozabadi R, Alton T, Wenke J. Novel Strategies for the Diagnosis of Posttraumatic Infections in Orthopaedic Trauma Patients. J Am Acad Orthop Surg. 2015 Jul;23(7):443-51. doi: 10.5435/JAAOS-D-14-00174. Epub 2015 Jun 3.
citation: Costerton JW, Post JC, Ehrlich GD, Hu FZ, Kreft R, Nistico L, Kathju S, Stoodley P, Hall-Stoodley L, Maale G, James G, Sotereanos N, DeMeo P. New methods for the detection of orthopedic and other biofilm infections. FEMS Immunol Med Microbiol. 2011 Mar;61(2):133-40. doi: 10.1111/j.1574-695X.2010.00766.x. Epub 2011 Jan 18.
citation: Costerton JW. Biofilm theory can guide the treatment of device-related orthopaedic infections. Clin Orthop Relat Res. 2005 Aug;(437):7-11. doi: 10.1097/00003086-200508000-00003.
citation: Dietz FR, Koontz FP, Found EM, Marsh JL. The importance of positive bacterial cultures of specimens obtained during clean orthopaedic operations. J Bone Joint Surg Am. 1991 Sep;73(8):1200-7.
citation: Panousis K, Grigoris P, Butcher I, Rana B, Reilly JH, Hamblen DL. Poor predictive value of broad-range PCR for the detection of arthroplasty infection in 92 cases. Acta Orthop. 2005 Jun;76(3):341-6.
citation: Simpson AH, Wood MK, Athanasou NA. Histological assessment of the presence or absence of infection in fracture non-union. Injury. 2002 Mar;33(2):151-5. doi: 10.1016/s0020-1383(01)00078-x.
citation: ELEK SD. Experimental staphylococcal infections in the skin of man. Ann N Y Acad Sci. 1956 Aug 31;65(3):85-90. doi: 10.1111/j.1749-6632.1956.tb36626.x. No abstract available.