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Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_17 | Pages 81 - 81
24 Nov 2023
Weisemann F Siverino C Trenkwalder K Heider A Moriarty F Hackl S
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Aim

Differentiation of infected (INF) nonunion from aseptic (AS) nonunion is crucial for the choice of intra- and postoperative treatment. Preoperative diagnosis of infected nonunion is challenging, especially in case of low-grade infection lacking clinical signs of infection. Standard blood markers such as C-reactive protein or leucocyte count do not aid in preoperative diagnosis. Proteomic profiling has shown promising results for differentiation of numerous chronic disease states, and in this study was applied to preoperative blood samples of patients with nonunion in an attempt to identify potential biomarkers.

Method

This prospective multicenter study enrolled patients undergoing revision surgery of femur or tibia nonunion. Patients with implant removal after regular fracture healing (HEAL) were included as a control-group. Preoperative blood samples, intraoperative tissue samples, sonication of osteosynthesis material and 1-year-follow-up questionnaire were taken. Nonunion patients were grouped into INF or AS after assessing bacterial culture and histopathology of retrieved samples. Diagnosis of infection followed the fracture related infection consensus group criteria, with additional consideration of healing one year after revision surgery. Targeted proteomics was used to investigate a predefined panel of 45 cytokines in preoperative blood samples. Statistical differences were calculated with Kruskal Wallis and Dunn's post hoc test. Cytokines with less than 80% of samples being above the lower limit of detection range (LLDR) were excluded for this study.


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_8 | Pages 65 - 65
11 Apr 2023
Siverino C Arens D Zeiter S Richards G Moriarty F
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In chronically infected fracture non-unions, treatment requires extensive debridement to remove necrotic and infected bone, often resulting in large defects requiring elaborate and prolonged bone reconstruction. One approach includes the induced membrane technique (IMT), although the differences in outcome between infected and non-infectious aetiologies remain unclear. Here we present a new rabbit humerus model for IMT secondary to infection, and, furthermore, we compare bone healing in rabbits with a chronically infected non-union compared to non-infected equivalents.

A 5 mm defect was created in the humerus and filled with a polymethylmethacrylate (PMMA) spacer or left empty (n=6 per group). After 3 weeks, the PMMA spacer was replaced with a beta-tricalcium phosphate (chronOs, Synthes) scaffold, which was placed within the induced membrane and observed for a further 10 weeks. The same protocol was followed for the infected group, except that four week prior to treatment, the wound was inoculated with Staphylococcus aureus (4×106 CFU/animal) and the PMMA spacer was loaded with gentamicin, and systemic therapy was applied for 4 weeks prior to chronOs application.

All the animals from the infected group were culture positive during the first revision surgery (mean 3×105 CFU/animal, n= 12), while at the second revision, after antibiotic therapy, all the animals were culture negative. The differences in bone healing between the non-infected and infected groups were evaluated by radiography and histology. The initially infected animals showed impaired bone healing at euthanasia, and some remnants of bacteria in histology. The non-infected animals reached bone bridging in both empty and chronOs conditions.

We developed a preclinical in vivo model to investigate how bacterial infection influence bone healing in large defects with the future aim to explore new treatment concepts of infected non-union.


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_13 | Pages 18 - 18
1 Jun 2017
Ferguson J Nagarajah K Stubbs D McNally M
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Aims

To investigate a treatment algorithm of various Ilizarov methods in managing infected tibial non-union.

Patients and Methods

A consecutive series of 76 patients with infected tibial non-union were treated with one of four Ilizarov protocols, consisting of; monofocal distraction (25 cases), monofocal compression (18), bifocal compression/distraction (16) and bone transport (17). Median duration of non-union was 10.5 months (range 2–546 months). All patients underwent at least one previous operation, 36 had associated limb deformity and 49 had non-viable non-unions. Twenty-six cases had a new muscle flap at the time of Ilizarov surgery and 24 others had pre-existing flaps.


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_8 | Pages 60 - 60
11 Apr 2023
Chalak A Kale S Mehra S Gunjotikar A Singh S Sawant R
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Osteomyelitis is an inflammatory condition accompanied by the destruction of bone and caused by an infecting microorganism. Open contaminated fractures can lead to the development of osteomyelitis of the fractured bone in 3-25% of cases, depending on fracture type, degree of soft-tissue injury, degree of microbial contamination, and whether systemic and/or local antimicrobial therapies have been administered. Untreated, infection will ultimately lead to non-union, chronic osteomyelitis, or amputation.

We report a case series of 10 patients that presented with post-operative infected non-union of the distal femur with or without prior surgery. The cases were performed at Padmashree Dr. D. Y. Patil Hospital, Nerul, Navi Mumbai, India. All the patients’ consents were taken for the study which was carried out in accordance with the Helsinki Declaration. The methodology involved patients undergoing a two-stage procedure in case of no prior implant or a three-stage procedure in case of a previous implant. Firstly, debridement and implant removal were done. The second was a definitive procedure in form of knee arthrodesis with ring fixator and finally followed by limb lengthening surgery.

Arthrodesis was planned in view of infection, non-union, severe arthritic, subluxated knee, stiff knee, non-salvage knee joint, and financial constraints. After all the patients demonstrated wound healing in 3 months along with good radiographic osteogenesis at the knee arthrodesis site, limb lengthening surgeries by tibial osteotomy were done to overcome the limb length discrepancy. Distraction was started and followed up for 5 months. All 10 patients showed results with sound knee arthrodesis and good osteogenesis at the osteotomy site followed by achieving the limb length just 1-inch short from the normal side to achieve ground clearance while walking. Our case series is unique and distinctive as it shows that when patients with infected nonunion of distal femur come with the stiff and non-salvage knee with severe arthritic changes and financial constraints, we should consider knee arthrodesis with Ilizarov ring fixator followed by limb lengthening surgery.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_16 | Pages 40 - 40
1 Dec 2015
Silva MD Wircker P Leitão F Martins R Côrte-Real N
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The aim of this abstract is to show that when dealing with an infected non-union, all possibilities of treatment must be considered in order to choose the best treatment plan for each patient. This case shows the evolution of an infected non-union following type III open fractures which, after the used of several methods that failed, had to be solved with amputation.

We present a case report of a 41 years old man, with a type IIIA open fracture of the right tibia and fibula. Initially, he was treated with an external fixator, which was removed and plate implanted. After this, he who presented to us with an infected non-union. He was submitted to surgery, the plate was removed and a circular external fixator was used. Six months later, the external fixator was removed and a reamed intramedullary nail was implanted with bone graft from iliac crest. One year later, the facture site was still mobile, so he was submitted to fixation with internal plate. As this last method also failed, a bellow knee amputation was performed, 4 years after the initial event.

After several attempts with several distinctive methods, the infected non-union had to be solved with the sacrifice of the limb.

The treatment of infected non-union is one of the most difficult in Orthopedic Surgery. There are several procedure that can be used. When all these fail, amputation and consequent limb prosthetic substitution, might allow the patient to return to the society.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_16 | Pages 66 - 66
1 Dec 2015
Bondarev O Sitnik A Volotovski P
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Problems of infected non-unions include not only infection and impossibility of weight-bearing, but also restricted ROM and compromised soft-tissues as result of trauma and previous surgeries. In such cases, treatment is long and difficult both for patient and treating surgeon. This study was performed to evaluate the efficacy of using antibiotic-impregnated cement locked nails for management of this condition.

The study included 28 patients with infected non-unions of femur (18) and tibia (10) treated from 01.2009 to 11.2013. Mean time from the injury to AB-cement nailing was 16.5(9–27) months. 4/18 femoral and 5/10 tibial fractures were open. Other fractures were closed and infected non-union developed as complication of previous surgeries: IM-nailing, ORIF or Ilizarov external fixation. Fistulas were revealed in all patients, but have closed by the time of AB-cement nailing in 18 cases. Pre- and intraoperative cultures revealed S.aureus in 18, S.epidermidis in 5, no grows in 5 cases. Solid stainless-steel locked nails (SIGN) were coated with AB-cement intraoperatively. Full weight-bearing was allowed 3 months after surgery. Follow-upwas performed in 6, 12, 24 and 52 weeks.

One year after surgery, X-ray revealed bone union in 25 (89.3%) patients and all 28 (100%) patients were full weight-bearing. In 3 (10.7%) cases, X-ray has revealed evident fracture line. Open fistulas were found in 4(14.3%) patients and required hardware removal and debridment.

AB-cement locked nailing achieved elimination of infection and fracture healing in the majority of patients. This method can be considered as effective and requires further studies.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_15 | Pages 44 - 44
1 Dec 2015
Gomes M Ramalho F Oliveira M Couto R Moura J Ferreira J Caetano V Loureiro M Viçoso S Vilela C Mendes M
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Surgical treatment of distal tibia fractures is usually associated with extensive soft tissue compromise and high complication rates (infection, delayed or non-union, ankle stiffness and osteoarthritis). Wound infection is one of the most common complication (deep infection rates up to 15%) and can develop into an infected non-union.

In 1973, Papineau described a staged technique for treating infected non-union of long bones, consisting of (1) surgical debridement of necrotic tissue, temporary splinting, specific antibiotic treatment, postoperative wet-to-dry wound dressing changes; (2) packing of the bone defect with cortico-cancellous autograft; (3) closure of the soft-tissue wound by a flap or secondary intent.

The authors aim to report a clinical case of a successful treatment of a distal tibia infected non-union with the Papineau technique and negative-pressure wound therapy.

Woman, 56 years-old, referred to Orthopaedic consultation on October 2013 for wound dehiscence and infection with a methicillin-resistant Staphylococcus aureus, one month after open reduction and internal fixation of an open distal tibia fracture.

On November 2013 she underwent surgical debridement, removal of osteosynthesis material, osteotaxis with external fixator, negative-pressure wound therapy and antibiotic treatment with intravenous vancomycin 1g 12/12h (1st stage of Papineau procedure)

On December, she underwent autologous iliac crest cancellous bone grafting and wound care, daily irrigated with saline solution (2nd stage).

On February 2014, she underwent a partial thickness skin graft for wound closure (3rd stage).

On April, the external fixator was removed and there was still no evidence of union. She had pain, disuse osteoporosis, ankle and midfoot stiffness, and was sent to physical therapy.

On April 2015, she can full weight bear with mild pain, the soft tissue envelope is in good condition, the fracture has united and she has an Ankle AOFAS Score of 83.

The Papineau technique has been used for the management of infected non-unions with bony defects, with high success rates. Complete necrotic tissue debridement and targeted antibiotics are fundamental for obtaining a viable and healthy tissue, able to receive the bone graft. Negative-pressure wound therapy is important in reducing the bacterial load, improving the microcirculation and enhancing the granulation tissue.

In the present case, the combination of the two techniques probably acted together in achieving successful eradication of the infection, reconstruction of the bone defect and soft tissue closure.


The Bone & Joint Journal
Vol. 104-B, Issue 9 | Pages 1095 - 1100
1 Sep 2022
McNally MA Ferguson JY Scarborough M Ramsden A Stubbs DA Atkins BL

Aims

Excision of chronic osteomyelitic bone creates a dead space which must be managed to avoid early recurrence of infection. Systemic antibiotics cannot penetrate this space in high concentrations, so local treatment has become an attractive adjunct to surgery. The aim of this study was to present the mid- to long-term results of local treatment with gentamicin in a bioabsorbable ceramic carrier.

Methods

A prospective series of 100 patients with Cierny-Mader Types III and IV chronic ostemyelitis, affecting 105 bones, were treated with a single-stage procedure including debridement, deep tissue sampling, local and systemic antibiotics, stabilization, and immediate skin closure. Chronic osteomyelitis was confirmed using strict diagnostic criteria. The mean follow-up was 6.05 years (4.2 to 8.4).


Bone & Joint Research
Vol. 10, Issue 11 | Pages 742 - 743
1 Nov 2021
Rupp M Walter N Baertl S Lang S Lowenberg DW Alt V


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_22 | Pages 4 - 4
1 Dec 2017
Ferguson J McNally M Kugan R Stubbs D
Full Access

Aims

Ilizarov described four methods of treating non-unions but gave little information on the specific indications for each technique. He claimed, ‘infection burns in the fire of regeneration’ and suggested distraction osteogenesis could effectively treat infected non-unions.

This study investigated a treatment algorithm for described Ilizarov methods in managing infected tibial non-union, using non-union mobility and segmental defect size to govern treatment choice. Primary outcome measures were infection eradication, bone union and ASAMI bone and function scores.

Patients and Methods

A consecutive series of 79 patients with confirmed, infected tibial non-union, were treated with one of four Ilizarov protocols, consisting of; monofocal distraction (26 cases), monofocal compression (19), bifocal compression/distraction (16) and bone transport (18). Median non-union duration was 10 months (range 2–168). All patients had undergone at least one previous operation (mean 2.2; range 1–5), 38 had associated limb deformity and 49 had non-viable non-unions. Twenty-six cases (33%) had a new simultaneous muscle flap reconstruction at the time of Ilizarov surgery and 25 had pre-existing flaps reused.

Treatment algorithm based on assessment of bone gap and non-union stiffness, measured after resection of non-viable bone.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_15 | Pages 48 - 48
1 Dec 2015
Kyriakopoulos C Kostakos A Kourtis M
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Methicillin– resistant Staphylococcus aureus (MRSA) infected gap non –union of long bones fractures is a challenge to manage. Treatment options are limited such a Ilizarov bone transport, vascularized bone free transfer etc. These techniques have complications and require expertise. We present a rare case with MRSA infected nonunion and bone defect 5cm of ulna which was managed with the induced membrane formation.

A 33-years old male presented to outpatient department, 2 months after internal fixation on both left bone forearm fractures (Gustillo I). There was pus discharge from the operative site of ulna. Culture results: MRSA, C-Reactive Protein (CRP): 2,58 (0–5), Erythrocyte Sedimentation Rate (ESR): 42 (0–20). Intravenous (iv) Teicoplanin and Rifampicin were administrated and after one month no topic symptoms and CRP- ESR were normal. One month later he had again actively draining sinus (CRP: 1,47 ESR:22). The implant (ulna) was removed and a gap 5 cm was created at the fracture site (necrotic-infected bone debrided), which was filled by cemented spacer (Tobramycin and vancomycin). An external fixator was applied to ulna. Radius was not involved. Post op. iv the same antibiotics for 4 weeks. At the end of 8 weeks, the spacer was removed and the gap was filled with autologous cancellous bone graft (iliac crest).

After 5 months the patient was reviewed. No any clinical and functional problems. Radiographics and CT-images were showed osseous consolidation.

This technique (called as ‘Masquelet’) gives promising result in the management of infected long bone defects in upper extremity.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_15 | Pages 37 - 37
1 Dec 2015
Babiak I Kulig M Pedzisz P Janowicz J
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Infected nonunion of the femur or tibia diaphysis requires resection of infected bone, stabilization of bone and reconstruction of bone defect. External fixation of the femur is poorly tolerated by patients. In 2004 authors introduced in therapy for infected nonunions of tibia and femur diaphysis coating of IMN with a layer of antibiotic loaded acrylic cement (ALAC) containing 5% of culture specific antibiotic. Seven patients with infected nonunion of the diaphysis of femur (2) and tibia (2) were treated, aged 20–63 years, followed for 2–9 years (average 5,5 years). All have been infected with S. aureus (MSSA: 2 and MRSA: 4) or Staph. epidermidis (1) and in one case with MRSA and Pseudomonas aeruginosa. All patients underwent 3 to 6 operations before authors IMN application. Custom-made IMN coated with acrylic cement (Palamed) loaded fabrically with gentamycin with admixture of 5% of culture-specific antibiotic: vancomycin (7 cases) and meropeneme (1 case) was used for bone stabilization. Static interlocking of IMN was applied in 4 cases and dynamic in 2 cases. In 1 case the femur was stabilized with IMN without interlocking screws. In 2 cases IMN was used for fixation of nonunion at docking site after bone transport. In 3 cases ALAC was used as temporary defect filling and dead space management. In one case after removal of IMN coated with ALAC, a new custom made Gamma nail and tubular bone allograft ranging 11 cm was used for defect reconstruction. Infection healing was achieved in all 7 cases, bone union was achieved in 4 from 7 cases. In 1 case of segmental diaphyseal defect ranging over 12 cm infection was healed, but bone defect was not reconstructed. This patient is waiting for total femoral replacement. In another case of segmental defect of 11 cm infection is healed, but allograft substitution and remodeling by host bone is poor. In the 3rd case of lacking bone healing, the 63 year old patients was noncooperative and not willing to walk in walker with weight bearing. This patient refused further treatment. Custom-made intramedullary nail coated with a layer of acrylic cement loaded with 5% of culture specific antibiotic can provide local infection control, offer comfortable bone stabilization, and replace standard IM nail in therapy for difficult to treat infected diaphyseal nonunion of femur or tibia


Orthopaedic Proceedings
Vol. 92-B, Issue SUPP_I | Pages 51 - 51
1 Mar 2010
Thonse R Conway J
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Nonunions and segmental bone defects associated with infection are challenging problems faced by the orthopaedic surgeon. Antibiotic cement-coated (ACC) interlocking nails, prepared in the operating theatre using nails and materials generally available, can be used to treat these conditions. Two different types of moulds can be used (reusable or disposable). Materials and Methods: The infected nonunion/segmental bone defect was treated by débridement followed by ACC nailing in 52 patients (12 female, 40 male, age range 16–86 years). Other procedures for deformity correction, bone defect etc were carried out simultaneously as indicated. Infected nonunion was seen in 34 patients, 1 was an acute fracture after external fixator. Segmental defect in the bone of 1 to 30 cm was seen in 17 patients. Anatomical sites included Femur (13), Tibia (11), Knee (12) and ankle (16). Results: Limb salvage was achieved in 96% and amputation in 2 patients. Bony union was achieved in 41 of 49 patients (84%). In 3 patients (15%), control of infection was achieved with stable nonunion (1 patient) and stable nonunion with cement spacer (2 patients). Control of infection was achieved in 85%. Single procedure achieved this goal in 73%. Cement nail de-bonding occurred during removal in 9 patients and during insertion in 1 patient. The average follow-up was 16 months (1 to 60 m). Conclusion: Dual goals of control of infection as well as stability to promote union can be achieved using this technique. Although useful for all infected nonunions, this technique is particularly useful for patients who are not ideal candidates for external fixators or those who do not want an external fixator


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_I | Pages 115 - 115
1 Mar 2008
Aslam N Nagarajah K McNally M
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Chronic osteomyelitis is a very difficult condition to treat. It presents a considerable challenge. A structured approach with a multidisciplinary team is important. Fifty-three patients with chronic femoral osteomyelitis were treated. Thirty-one cases followed fracture fixation, fourteen haematological, two knee fusion and two iatrogenic. Cierny and Mader grade was IV in twenty-eight cases(twelve non-unions). Union was achieved in eleven of twelve nonunions. 85% of cases were infection free with the current treatment. 92% union rate was achieved. Eradication of infection and functional preservation can be achieved by wide local debridement with good soft tissue coverage and skeletal stabilisation. Chronic osteomyelitis is a very difficult condition to treat. It presents a considerable challenge. A structured approach with a multi-disciplinary team is important. 85% of cases were infection free with the current treatment. 92% union rate was achieved. Eradication of infection and functional preservation can be achieved by wide local debridement with good soft tissue coverage and skeletal stabilisation. Fifty-three patients with chronic femoral osteomyelitis were treated. Mean age at onset was thirty-one years and mean duration of infection was one hundred and six months (range 2–504). Thirty-one cases followed fracture fixation, fourteen haematological, two- knee fusion and two iatrogenic. Cierny and Mader grade was IV in twenty-eight cases(twelve non-unions), III in twelve, II in two and I in eleven cases. Intramedullary disease was treated by reaming and cortical disease by local excision. Radical excision was done for local disease. Radical/segmental excision reserved for type IV disease. This was followed by dead space management (local antibiotics in thirty-eight patients), stabilization and iv antibiotics(four to six weeks). Infected nonunion was treated with excision and stabilization or Ilizarov reconstruction. Union was achieved in eleven of twelve nonunions. 85% of cases were infection free at a mean follow-up of thirty months (7–48)


Bone & Joint Open
Vol. 1, Issue 6 | Pages 287 - 292
19 Jun 2020
Iliadis AD Eastwood DM Bayliss L Cooper M Gibson A Hargunani R Calder P

Introduction

In response to the COVID-19 pandemic, there was a rapidly implemented restructuring of UK healthcare services. The The Royal National Orthopaedic Hospital, Stanmore, became a central hub for the provision of trauma services for North Central/East London (NCEL) while providing a musculoskeletal tumour service for the south of England, the Midlands, and Wales and an urgent spinal service for London. This study reviews our paediatric practice over this period in order to share our experience and lessons learned. Our hospital admission pathways are described and the safety of surgical and interventional radiological procedures performed under general anaesthesia (GA) with regards to COVID-19 in a paediatric population are evaluated.

Methods

All paediatric patients (≤ 16 years) treated in our institution during the six-week peak period of the pandemic were included. Prospective data for all paediatric trauma and urgent elective admissions and retrospective data for all sarcoma admissions were collected. Telephone interviews were conducted with all patients and families to assess COVID-19 related morbidity at 14 days post-discharge.


Bone & Joint 360
Vol. 5, Issue 6 | Pages 32 - 34
1 Dec 2016