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McCall B, Rana K, Sugden K, Junaid S. In-vitro external fixation pin-site model proof of concept: A novel approach to studying wound healing in transcutaneous implants. Proc Inst Mech Eng H 2024; 238:403-411. [PMID: 38602217 PMCID: PMC11010558 DOI: 10.1177/09544119241234154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 02/05/2024] [Indexed: 04/12/2024]
Abstract
External fixation is an essential surgical technique for treating trauma, limb lengthening and deformity correction, however infection is common, with infection rates ranging from 4.5 to 100% of cases. Throughout the literature researchers and clinicians have highlighted a relationship between excessive movement of the pin and skin and an increase in the patient's risk of infection, however, currently no studies have addressed this role of pin-movement on pin-site wounds. This preliminary study describes a novel in vitro pin-site model, developed using a full-thickness human skin equivalent (HSE) model in conjunction with a bespoke mechanical system which simulates pin-movement. The effect of pin-movement on the wound healing response of the skin equivalents was assessed by measuring the expression of pro-inflammatory cytokines. Six human skin equivalent models were divided into three test groups: no pin as the control, static pin-site wound and dynamic pin-site wound (n = 3). On day 3 concentrations of IL-1α and IL-8 showed a significant increase compared to the control when a static fixation pin was implanted into the skin equivalent (p < 0.05) and (p < 0.005) respectively. Levels of IL-1α and IL-8 increased further in the dynamic sample compared to the static sample (p < 0.05) and (p < 0.0005). This study demonstrates for the first time the application of HSE model to study external-fixation pin-movement in vitro. The results of this study demonstrated pin-movement has a negative effect on soft-tissue wound-healing, supporting the anecdotal evidence reported in the literature, however further analysis of wound heading would be required to verify this hypothesis.
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Affiliation(s)
- Blake McCall
- Biomedical Engineering Research Group, School of Engineering and Applied Science, Aston University, Birmingham, UK
| | - Karan Rana
- Aston Research Centre for Healthy Ageing, School of Life and Health Science, Aston University, Birmingham, UK
| | - Kate Sugden
- Aston Institute of Photonics Technology, College of Engineering and Physical Sciences, Aston University, Birmingham, UK
| | - Sarah Junaid
- Biomedical Engineering Research Group, School of Engineering and Applied Science, Aston University, Birmingham, UK
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Deluca M, Hoffman BA, Serdahely K, Ravi S, Sanford C. Addition of a Second Calcaneal Pin for Spanning Ankle External Fixation. Cureus 2024; 16:e55312. [PMID: 38559505 PMCID: PMC10981796 DOI: 10.7759/cureus.55312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/29/2024] [Indexed: 04/04/2024] Open
Abstract
Spanning ankle external fixation is a commonly used technique for the treatment of fractures of the lower extremity. Traditionally, a single pin is placed in the safe zone of the calcaneus to provide a point of traction for fracture reduction and stabilization. Complications include infection and pin loosening with subsequent loss of fracture reduction. We aim to highlight the benefits and techniques of adding a second calcaneal pin to reduce the likelihood of infection, pin loosening, and possible loss of fracture reduction. Using the standard medial-to-lateral placement technique, two centrally threaded Schanz pins were placed within the safe zone of the calcaneus approximately 2 cm apart and were connected by clamps and a short carbon fiber rod. The remainder of the external fixation apparatus is assembled using a standard technique after obtaining fracture reduction. There is an increased incidence of infection and pin loosening with decreased bone quality and a longer duration within an external fixator. The addition of a second calcaneal pin can be used to reduce the incidence of pin loosening and associated sequela, especially in patients with decreased bone quality, thus improving outcomes for patients undergoing spanning ankle external fixation.
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Affiliation(s)
- Meridith Deluca
- Orthopedics, The University of Toledo College of Medicine and Life Sciences, Toledo, USA
| | - Brett A Hoffman
- Orthopedics, The University of Toledo College of Medicine and Life Sciences, Toledo, USA
| | - Kevin Serdahely
- Orthopedics, The University of Toledo College of Medicine and Life Sciences, Toledo, USA
| | - Sreeram Ravi
- Orthopedics, Penn State Health Milton S. Hershey Medical Center, State College, USA
| | - Christopher Sanford
- Orthopedics, The University of Toledo College of Medicine and Life Sciences, Toledo, USA
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Struik T, Mastbergen SC, Brouwer RW, Custers RJH, van Geenen RCI, Heusdens CHW, Emans PJ, Huizinga MR, Jansen MP. Joint distraction using a purpose-built device for knee osteoarthritis: a prospective 2-year follow-up. RMD Open 2023; 9:rmdopen-2023-003074. [PMID: 37290929 DOI: 10.1136/rmdopen-2023-003074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 05/22/2023] [Indexed: 06/10/2023] Open
Abstract
OBJECTIVE Knee distraction treatment for end-stage osteoarthritis successfully postpones arthroplasty for years. Studies performed thus far used general intended use, patient-personalised or custom-made devices. In this study, for the first time, a device specifically designed for knee distraction is evaluated. DESIGN 65 patients (≤65 years) with end-stage knee osteoarthritis indicated for arthroplasty received knee distraction. Before, 1-year and 2-year post-treatment, questionnaires were filled out and knee radiographs made. Adverse events and self-reported pain medication were registered. RESULTS Forty-nine patients completed 2-year follow-up: one patient did not complete treatment, three patients received arthroplasty in the first and four patients in the second year follow-up. Eight patients were lost to follow-up in the second year. The total Western Ontario and McMaster Universities Osteoarthritis Index score showed a clinically relevant improvement at 1 and 2 years (+26 and +24 points), as did all subscales (all p<0.001). The minimum radiographic joint space width improved over 1 (+0.5 mm; p<0.001) and 2 (+0.4 mm; p=0.015) years, as did the physical Short-Form 36 (+10 points; p<0.001). The most common adverse event was pin tract infection, experienced by 66% of patients, in 88% successfully treated with oral antibiotics. In two cases, hospitalisation and/or intravenous antibiotics were needed. Eight patients experienced device-related complications. None of the complications influenced 2-year outcomes. Before treatment, 42% of patients used pain medication, which had nearly been halved 1 (23%; p=0.02) and 2 years (29%; p=0.27) post-treatment. CONCLUSIONS Patients treated with a general applicable, for knee distraction purpose-built device showed, despite adverse events, significant clinical and structural improvement over 2 years. TRIAL REGISTRATION NUMBER NL7986.
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Affiliation(s)
- Thijmen Struik
- Department of Rheumatology & Clinical Immunology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Simon C Mastbergen
- Department of Rheumatology & Clinical Immunology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Reinoud W Brouwer
- Department of Orthopedics, Martini Hospital, Groningen, The Netherlands
| | - Roel J H Custers
- Department of Orthopedic Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands
| | | | - Christiaan H W Heusdens
- Department of Orthopedics, University Hospital Antwerp, Edegem, Antwerp, Belgium
- Antwerp Surgical Training, Anatomy and Research Centre (ASTARC), Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Pieter J Emans
- Department of Orthopedics, Joint-Preserving Clinic, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | | | - Mylène P Jansen
- Department of Rheumatology & Clinical Immunology, University Medical Centre Utrecht, Utrecht, The Netherlands
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van Bergen EDP, Mastbergen SC, Vogely HC, Balani TN, de Kleijn P, Foppen W, van Roermund PM, Lafeber FPJG, Schutgens REG, van Vulpen LFD. Ankle joint distraction is a promising alternative treatment for patients with severe haemophilic ankle arthropathy. Haemophilia 2022; 28:1044-1053. [PMID: 35921386 PMCID: PMC9804549 DOI: 10.1111/hae.14633] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 06/27/2022] [Accepted: 07/06/2022] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Haemophilic ankle arthropathy (HAA) causes major morbidity. When conservative treatment fails, major surgical interventions are indicated. An alternative treatment to maintain joint mobility and postpone these interventions is desired. AIM To gather prospective data on clinical/structural changes after ankle joint distraction (AJD) in HAA. METHODS This study includes patients with severe HAA insufficiently responding to conservative treatment. AJD was performed during 8-10 weeks by use of an external frame. Questionnaires, physical examination and radiology were used to evaluate pain, function and structural changes before and 6, 12, 24 and 36 months after distraction. Mixed effect models were used for analysis. RESULTS This study includes eight cases (21-53 years). The fixed effects estimates of the visual analogue score (0-10) improved from 7.5 at baseline to 3.4 (p = .023) 3 years after distraction. The Haemophilia Activities List (HAL, 0-100) for basic/complex lower extremities functions improved from respectively 29.6 and 31.5 to 54.3 (p = .015) and 50.7 (p = .031). Joint mobility was maintained. Magnetic resonance imaging (MRI) showed thickened cartilage and reduced bone marrow oedema and subchondral cysts. Pin tract infections (n = 6) were effectively treated and no adverse bleeding events occurred. At 3-year follow-up, in none of the patients the originally indicated arthrodesis was performed. CONCLUSION This first prospective study showed that AJD in HAA results in decreased pain, improved function and decreased arthropathy-related MRI findings in the majority of patients for prolonged time. Although the study population is small and follow-up is relatively short, AJD may be promising to postpone invalidating interventions and might be a breakthrough treatment.
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Affiliation(s)
- Eline D. P. van Bergen
- Center for Benign HaematologyThrombosis and HaemostasisUniversityMedical Center UtrechtUniversity UtrechtVan CreveldkliniekUtrechtThe Netherlands,Departmentof Rheumatology & Clinical ImmunologyUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - Simon C. Mastbergen
- Departmentof Rheumatology & Clinical ImmunologyUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - H. Charles Vogely
- Department of Orthopedic SurgeryUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - Tanya N. Balani
- Departmentof Rheumatology & Clinical ImmunologyUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - Piet de Kleijn
- Center for Benign HaematologyThrombosis and HaemostasisUniversityMedical Center UtrechtUniversity UtrechtVan CreveldkliniekUtrechtThe Netherlands
| | - Wouter Foppen
- Department of RadiologyUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - Peter M. van Roermund
- Department of Orthopedic SurgeryUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - Floris P. J. G. Lafeber
- Departmentof Rheumatology & Clinical ImmunologyUniversity Medical Center UtrechtUniversity UtrechtUtrechtThe Netherlands
| | - Roger E. G. Schutgens
- Center for Benign HaematologyThrombosis and HaemostasisUniversityMedical Center UtrechtUniversity UtrechtVan CreveldkliniekUtrechtThe Netherlands
| | - Lize F. D. van Vulpen
- Center for Benign HaematologyThrombosis and HaemostasisUniversityMedical Center UtrechtUniversity UtrechtVan CreveldkliniekUtrechtThe Netherlands
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Eardley W, Ferguson D, Dixon J. Do pin site cleaning techniques and solutions affect pin site infection rate in external fixation? A systematic review of randomized and nonrandomized trials. JOURNAL OF LIMB LENGTHENING & RECONSTRUCTION 2022. [DOI: 10.4103/jllr.jllr_9_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Bin Abd Razak HR, Campos JP, Khakha RS, Wilson AJ, van Heerwaarden RJ. Role of joint distraction in osteoarthritis of the knee: Basic science, principles and outcomes. J Clin Orthop Trauma 2022; 24:101723. [PMID: 34938647 PMCID: PMC8654974 DOI: 10.1016/j.jcot.2021.101723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 11/26/2021] [Indexed: 12/25/2022] Open
Abstract
The burden of knee osteoarthritis (OA) is increasing worldwide. Advanced tibiofemoral joint OA in young patients is particularly a problem with inferior results seen with total knee arthroplasty in this patient population. Knee joint distraction (KJD) has been evaluated recently as a joint preserving procedure for young patients with advanced tibiofemoral osteoarthritis, to delay the need for a primary total knee arthroplasty (TKA). This will decrease the risk for revision TKA later in life. KJD temporarily unloads the knee joint and keeps the tibia and femur separated over a course of 6 weeks. Outcomes of KJD appear promising. Through this article, the authors hope to share from their collective experience as well as the available literature on the basic science, principles of surgery and outcomes of KJD.
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Affiliation(s)
- Hamid Rahmatullah Bin Abd Razak
- London Knee Osteotomy Centre, Orthopaedic Specialists, Harley Street Specialist Hospital, 18-22 Queen Anne St, London, W1G 8HU, United Kingdom
- Department of Orthopaedic Surgery, Sengkang General Hospital, 110 Sengkang East Way, 544886, Singapore
| | - João Pedro Campos
- London Knee Osteotomy Centre, Orthopaedic Specialists, Harley Street Specialist Hospital, 18-22 Queen Anne St, London, W1G 8HU, United Kingdom
- Serviço de Ortopedia e Traumatologia, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, Matosinhos, Portugal
| | - Raghbir S. Khakha
- London Knee Osteotomy Centre, Orthopaedic Specialists, Harley Street Specialist Hospital, 18-22 Queen Anne St, London, W1G 8HU, United Kingdom
- Department of Orthopaedics, Guys & St Thomas's Hospital, Great Maze Pond, SE1 9RT, United Kingdom
| | - Adrian J. Wilson
- London Knee Osteotomy Centre, Orthopaedic Specialists, Harley Street Specialist Hospital, 18-22 Queen Anne St, London, W1G 8HU, United Kingdom
- Department of Sports and Exercise, University of Winchester, Sparkford Road, Winchester, SO22 4NR, United Kingdom
| | - Ronald J. van Heerwaarden
- London Knee Osteotomy Centre, Orthopaedic Specialists, Harley Street Specialist Hospital, 18-22 Queen Anne St, London, W1G 8HU, United Kingdom
- Centre for Deformity Correction and Joint Preserving Surgery, Kliniek ViaSana, Mill, the Netherlands
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Jansen MP, Mastbergen SC. Joint distraction for osteoarthritis: clinical evidence and molecular mechanisms. Nat Rev Rheumatol 2022; 18:35-46. [PMID: 34616035 DOI: 10.1038/s41584-021-00695-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/06/2021] [Indexed: 12/20/2022]
Abstract
Joint distraction, the prolonged mechanical separation of the bones at a joint, has emerged as a joint-preserving treatment for end-stage osteoarthritis, with the gradually growing promise of implementation in regular clinical practice. Joint distraction of the knee has been most extensively studied, with these studies showing prolonged symptomatic improvement in combination with repair of cartilage tissue in degenerated knee joints, supporting the concept that cartilage repair can translate into real clinical benefit. The reversal of tissue degeneration observed with joint distraction could be the result of one or a combination of various proposed mechanisms, including partial unloading, synovial fluid pressure oscillation, mechanical and biochemical changes in subchondral bone, adhesion and chondrogenic commitment of joint-derived mesenchymal stem cells or a change in the molecular milieu of the joint. The overall picture that emerges from the combined evidence is relevant for future research and treatment-related improvements of joint distraction and for translation of the insights gained about tissue repair to other joint-preserving techniques. It remains to be elucidated whether optimizing the biomechanical conditions during joint distraction can actually cure osteoarthritis rather than only providing temporary symptomatic relief, but even temporary relief might be relevant for society and patients, as it will delay joint replacement with a prosthesis at an early age and thereby avert revision surgery later in life. Most importantly, improved insights into the underlying mechanisms of joint repair might provide new leads for more targeted treatment options.
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Affiliation(s)
- Mylène P Jansen
- Rheumatology & Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Simon C Mastbergen
- Rheumatology & Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands.
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Clinical outcomes of knee joint distraction combined with marrow stimulation procedures for patients with advanced knee osteoarthritis. Knee 2021; 33:342-350. [PMID: 34749126 DOI: 10.1016/j.knee.2021.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 04/26/2021] [Accepted: 10/03/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Knee joint distraction (KJD) has received much attention as a joint preserving surgery, especially in young patients with advanced knee osteoarthritis (OA). METHODS This study included 16 patients with advanced knee OA who underwent KJD combined with marrow stimulating techniques and were followed up for more than 2 years. The patients' clinical scores, including the Japanese Orthopaedic Association (JOA) score, Knee Injury and Osteoarthritis Outcome Score (KOOS) subscales, ROM, joint space width, and semiquantitative MRI were evaluated. The factors affecting clinical outcomes were analyzed. RESULTS Postoperatively, the JOA score and the individual scores of the KOOS subscales improved significantly (JOA score: P = 0.0028, KOOS-symptoms: P = 0.0016, -pain: P = 0.0011, -ADL: P = 0.0009, -sports/recreation: P = 0.0144, and -QOL: P = 0.0034). Although the extension of the knee joint did not change throughout the follow-up period, flexion of the joint deteriorated at the time of device removal but recovered to the preoperative level at the final follow-up. Preoperative joint space width was 2.4 ± 2.0 mm and at the final follow-up, it increased to 3.3 ± 1.5 mm, showing statistically significant improvement (P = 0.034). The postoperative semiquantitative MRI score also improved significantly (from 6.0 ± 3.0 to 42.1 ± 28.7, P = 0.0001). A high BMI was associated with a poor clinical outcome. CONCLUSION Although the effect of marrow stimulating techniques for cartilage repair was not well clarified and the complication rate was high, the clinical and radiographic outcomes showed significant improvement after KJD combined with marrow stimulating techniques in patients with advanced knee OA. However, we should be careful about suggesting this procedure in obese patients.
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