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Gillespie BM, Harbeck EL, Sandy-Hodgetts K, Rattray M, Thalib L, Patel B, Andersson AE, Walker RM, Latimer S, Chaboyer WP. Incidence of wound dehiscence in patients undergoing laparoscopy or laparotomy: a systematic review and meta-analysis. J Wound Care 2023; 32:S31-S43. [PMID: 37591664 DOI: 10.12968/jowc.2023.32.sup8a.s31] [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] [Indexed: 08/19/2023]
Abstract
Surgical wound dehiscence (SWD) is a serious complication-with a 40% estimated mortality rate-that occurs after surgical intervention. Since the implementation of advanced recovery protocols, the current global incidence of SWD is unknown. This systematic review and meta-analysis estimated the worldwide incidence of SWD and explored its associated factors in general surgical patients. Eligible full-text cross-sectional, cohort and observational studies in English, between 1 January 2010 to 23 April 2021, were retrieved from MEDLINE, CINAHL, EMBASE and the Cochrane Library. Data extraction and quality appraisal were undertaken independently by three reviewers. Random effects meta-analytic models were used in the presence of substantial inconsistency. Subgroup, meta-regression and sensitivity analyses were used to explore inconsistency. Publication bias was assessed using Hunter's plots and Egger's regression test. Of 2862 publications retrieved, 27 studies were included in the final analyses. Pooled data from 741,118 patients across 24 studies were meta-analysed. The 30-day cumulative incidence of SWD was 1% (95% Confidence Interval (CI): 1-1%). SWD incidence was highest in hepatobiliary surgery, at 3% (95% CI: 0-8%). Multivariable meta-regression showed SWD was significantly associated with duration of operation and reoperation (F=7.93 (2-10); p=0.009), explaining 58.2% of the variance. Most studies were retrospective, predated the agreed global definition for SWD and measured as a secondary outcome; thus, our results likely underestimate the scope of the problem. Wider uptake of the global definition will inform the SWD surveillance and improve the accuracy of reporting.
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Affiliation(s)
- Brigid M Gillespie
- National Health and Medical Research Council Centre of Research Excellence in Wiser Wound Care, Menzies Health Institute Queensland, Griffith University, Australia
- Gold Coast University Hospital, Gold Coast Health Nursing and Midwifery Education and Research Unit, Queensland, Australia
| | - Emma L Harbeck
- National Health and Medical Research Council Centre of Research Excellence in Wiser Wound Care, Menzies Health Institute Queensland, Griffith University, Australia
| | - Kylie Sandy-Hodgetts
- School of Biomedical Sciences, University of Western Australia Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Australia
| | - Megan Rattray
- Menzies Health Institute Queensland, Griffith University, Australia
| | - Lukman Thalib
- Department of Biostatistics, Faculty of Medicine, Istanbul Aydın University, Istanbul, Turkey
| | - Bhavik Patel
- Acute Care and Trauma Surgery, Gold Coast University Hospital, Queensland, Australia
| | - Annette Erichsen Andersson
- Institute of Health Care Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
- Department of Anesthesiology and Intensive Care Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Rachel M Walker
- School of Nursing and Midwifery, Griffith University, Queensland, Australia
- Division of Surgery, Princess Alexandra Hospital, Queensland, Australia
| | - Sharon Latimer
- School of Nursing and Midwifery, Griffith University, Queensland, Australia
| | - Wendy P Chaboyer
- National Health and Medical Research Council Centre of Research Excellence in Wiser Wound Care, Menzies Health Institute Queensland, Griffith University, Australia
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Sandy-Hodgetts K, Assadian O, Wainwright TW, Rochon M, Van Der Merwe Z, Jones RM, Serena T, Alves P, Smith G. Clinical prediction models and risk tools for early detection of patients at risk of surgical site infection and surgical wound dehiscence: a scoping review. J Wound Care 2023; 32:S4-S12. [PMID: 37591662 DOI: 10.12968/jowc.2023.32.sup8a.s4] [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] [Indexed: 08/19/2023]
Abstract
OBJECTIVE Despite advances in surgical techniques, intraoperative practice and a plethora of advanced wound therapies, surgical wound complications (SWCs), such as surgical site infection (SSI) and surgical wound dehiscence (SWD), continue to pose a considerable burden to the patient and healthcare setting. Predicting those patients at risk of a SWC may give patients and healthcare providers the opportunity to implement a tailored prevention plan or potentially ameliorate known risk factors to improve patient postoperative outcomes. METHOD A scoping review of the literature for studies which reported predictive power and internal/external validity of risk tools for clinical use in predicting patients at risk of SWCs after surgery was conducted. An electronic search of three databases and two registries was carried out with date restrictions. The search terms included 'prediction surgical site infection' and 'prediction surgical wound dehiscence'. RESULTS A total of 73 records were identified from the database search, of which six studies met the inclusion criteria. Of these, the majority of validated risk tools were predominantly within the cardiothoracic domain, and targeted morbidity and mortality outcomes. There were four risk tools specifically targeting SWCs following surgery. CONCLUSION The findings of this review have highlighted an absence of well-developed risk tools specifically for SSI and/or SWD in most surgical populations. This review suggests that further research is required for the development and clinical implementation of rigorously validated and fit-for-purpose risk tools for predicting patients at risk of SWCs following surgery. The ability to predict such patients enables the implementation of preventive strategies, such as the use of prophylactic antibiotics, delayed timing of surgery, or advanced wound therapies following a procedure.
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Affiliation(s)
- Kylie Sandy-Hodgetts
- Program Lead, Skin Integrity Research Group, Centre for Molecular Medicine & Innovative Therapeutics, Health Futures Institute Murdoch University, Perth, WA, Australia
- Adjunct Senior Research Fellow, University of Western Australia, Perth, WA, Australia
| | - Ojan Assadian
- Medical Director, Regional Hospital Wiener Neustadt, Austria
- Institute for Skin Integrity and Infection Prevention, School of Human and Health Sciences, University of Huddersfield, UK
| | - Thomas W Wainwright
- Professor of Orthopaedics, Orthopaedic Research Institute, Bournemouth University, Bournemouth, UK
- Physiotherapy Department, University Hospitals Dorset NHS Foundation Trust, Bournemouth, UK
| | - Melissa Rochon
- Trust Lead for SSI Surveillance, Research & Innovation Surveillance and Innovation Unit, Directorate of Infection, Guy's and St Thomas' NHS Foundation Trust, UK
| | | | | | | | - Paulo Alves
- Universidade Católica Portuguesa, Centre for Interdisciplinary Research in Health, Wounds Research Lab, Portugal
| | - George Smith
- Vascular Surgery Unit, Hull York Medical School, York, UK
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Rousseau T, Plomion C, Sandy‐Hodgetts K. An advanced transparent hydropolymer wound dressing for undisturbed post‐op management of surgical wounds following hip and knee replacement: A prospective observational series. Int Wound J 2022; 19:1456-1462. [PMID: 35092178 PMCID: PMC9493219 DOI: 10.1111/iwj.13742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 12/01/2021] [Indexed: 11/30/2022] Open
Abstract
Total hip arthroplasty (THA) and total knee arthroplasty (TKA) are standardised surgical procedures for patients with complex comorbidities. The enhanced recovery after surgery (ERAS) protocol has shown reduced lengths of hospital stay and reduced postoperative complications. Currently, there is a paucity of recommendations in regards to dressing selection for postoperative wound care within the ERAS protocol. The aim of this study was to investigate the usefulness of a transparent hydropolymer wound dressing in suit for 14 days in 20 orthopaedic patients following hip or knee arthroplasty under the ERAS protocol. The majority of participants (90%) had a wear time of 14 days without the need for dressing removal. Clinicians rated the dressing very easy to apply with very good visibility of the incision line (100%). All participants reported the dressing to be ‘very comfortable’ (95%, n = 19) or ‘comfortable’ (5%, n = 1). Overall, the transparent hydropolymer dressing provided sufficient incision site visibility, reducing the need for dressing changes. To the best of our knowledge, this is the first study to show that the use of a transparent hydropolymer dressing in situ for 14 days to allow undisturbed wound healing.
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Affiliation(s)
- Thomas Rousseau
- Department of Orthopedic Surgery Clinique Mutualiste Catalane Perpignan France
| | | | - Kylie Sandy‐Hodgetts
- University of Western Australia Perth Western Australia Australia
- Centre for Molecular Medicine & Innovative Therapeutics Murdoch University Perth Western Australia Australia
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Saunders R, Hansson Hedblom A. The Economic Implications of Introducing Single-Patient ECG Systems for Cardiac Surgery in Australia. CLINICOECONOMICS AND OUTCOMES RESEARCH 2021; 13:727-735. [PMID: 34413659 PMCID: PMC8370584 DOI: 10.2147/ceor.s325257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 07/26/2021] [Indexed: 11/23/2022] Open
Abstract
Introduction Sternal wound infections (SWIs) are severe adverse events of cardiac surgery. This study aimed to estimate the economic burden of SWIs following coronary artery bypass grafts (CABG) in Australia. It also aimed to estimate the national and hospital cost-benefit of adopting single-patient electrocardiograph (spECG) systems for CABG monitoring, a measure that reduces the rate of surgical site infections (SSIs). Material and Methods A literature review, which focused on CABG-related SSIs, was conducted to identify data which were then used to adapt a published Markov cost-effectiveness model. The model adopted an Australian hospital perspective. Results The average SWI-related cost of care increase per patient was estimated at 1022 Australian dollars (AUD), and the annual burden to the Australian health care system at AUD 9.2 million. SWI burden comprised 360 additional intensive care unit (ICU) days; 1979 additional general ward (GW) days; and 186 readmissions. Implementing spECG resulted in 103 fewer ICU days, 565 fewer GW days, 48 avoided readmissions, and a total national cost saving of AUD 2.5 million, annually. A hospital performing 200 yearly CABGs was estimated to save AUD 54,830. Conclusion SWIs cause substantial costs to the Australian health care system. Implementing new technologies shown to reduce the SWI rate is likely to benefit patients and reduce costs.
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Ammar AS, Naqi SA, Khattak S, Noumani AR. Outcome of abdominal binder in midline abdominal wound Dehiscence in terms of pain, psychological satisfaction and need for reclosure. Pak J Med Sci 2021; 37:1118-1121. [PMID: 34290793 PMCID: PMC8281147 DOI: 10.12669/pjms.37.4.3671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/12/2020] [Accepted: 03/20/2021] [Indexed: 11/15/2022] Open
Abstract
Objective To assess the role of abdominal binder in patients with midline wound dehiscence after elective or emergency laparotomy in terms of pain, psychological satisfaction and need for reclosure. Methods It was a comparative study done at EAST Surgical Ward of Mayo Hospital, Lahore from 1st January 2018 to 31st December 2019. One hundred and sixty-two (162) patients were included in this study with post-operative midline abdominal wound dehiscence and after informed consent by consecutive non probability sampling technique. Patients were divided into two groups by lottery method into eighty-one patients each. Group-A included patients where abdominal binder was applied and Group-B included patients without abdominal binder. In both groups pain score, psychological satisfaction and need for reclosure was assessed and compared. Results Patients with abdominal binder shows significantly less pain (P value =0.000) and more psychological satisfaction (P value = 0.000) as compared to the patients where abdominal binder was not used. However, there was no difference in reducing the need for reclosure in patients who use abdominal binder (P value = 0.063). Conclusion Although abdominal binder helps in reducing the pain and improving the psychological satisfaction in patients with midline abdominal wound dehiscence yet it doesn't help in healing of wound and reclosure of the dehisced abdominal wound is needed.
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Affiliation(s)
- Ahmed Siddique Ammar
- Dr. Ahmed Siddique Ammar, MBBS, MS General Surgery Senior Registrar, EAST Surgical Ward, Mayo Hospital, Lahore, Pakistan
| | - Syed Asghar Naqi
- Prof. Dr. Syed Asghar Naqi, MBBS, FCPS, FRCS, MCPS-HPE Professor and Head of Surgical Department, EAST Surgical Ward, MAYO Hospital, Lahore, Pakistan. EAST Surgical Ward, Mayo Hospital, Lahore, Pakistan
| | - Shehrbano Khattak
- Dr. Shehrbano Khattak, MBBS, M-Phill Biochemistry Lecturer, Department of Biochemistry, King Edward Medical University, Lahore, Pakistan
| | - Ahmed Raza Noumani
- Dr. Ahmed Raza Noumani, MBBS, MS General Surgery Senior Registrar, EAST Surgical Ward, Mayo Hospital, Lahore, Pakistan
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Sandy-Hodgetts K, Carville K, Santamaria N, Parsons R, Leslie GD. The Perth Surgical Wound Dehiscence Risk Assessment Tool (PSWDRAT): development and prospective validation in the clinical setting. J Wound Care 2019; 28:332-344. [PMID: 31166854 DOI: 10.12968/jowc.2019.28.6.332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The worldwide volume of surgery today is considerable and postoperative wound healing plays a significant part in facilitating a patient's recovery and rehabilitation. While contemporary surgical procedures are relatively safe, complications such as surgical wound dehiscence (SWD) or breakdown of the incision site may occur despite advances in surgical techniques, infection control practices and wound care. SWD impacts on patient mortality and morbidity and significantly contributes to prolonged hospital stay. Preoperative identification of patients at risk of SWD may be valuable in reducing the risk of postoperative wound complications. METHOD A three-phase study was undertaken to determine risk factors associated with SWD, develop a preoperative patient risk assessment tool and to prospectively validate the tool in a clinical setting. Phases 1 and 2 were retrospective case control studies. Phase 1 determined variables associated with SWD and these informed the development of a risk assessment tool. Univariate analysis and multiple logistic regression were applied to identify predictors of surgical risk. Phase 2 used the receiver operator curve statistic to determine the predictive power of the tool. Phase 3 involved a prospective consecutive case series validation to test the inter-rater reliability and predictive power of the tool. RESULTS In addition to those already identified in the literature, one independent risk predictor for SWD was identified: previous surgery in the same anatomical location (p<0.001, odds ratio [OR] 4). Multiple combined factors were integrated into the tool and included: age (p<0.019, OR 3), diabetes (p<0.624, OR 2), obesity (p<0.94, OR 1.4), smoking (p<0.387, OR 2), cardiovascular disease (p<0.381 OR 3) and peripheral arterial disease (p<0.501, OR 3). The predictive power of the tool yielded 71% in a combined data sample. CONCLUSION Patients with previous surgery in the same anatomical location were four times more likely to incur a dehiscence. Identification of at-risk patients for complications postoperatively is integral to reducing SWD occurrence and improving health-related outcomes following surgery.
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Affiliation(s)
- Kylie Sandy-Hodgetts
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Medicine, University of Western Australia, UWA Department of Obstetrics, King Edward Memorial Hospital, Perth, Western Australia
| | - Keryln Carville
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Medicine, University of Western Australia, UWA Department of Obstetrics, King Edward Memorial Hospital, Perth, Western Australia
| | - Nick Santamaria
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Medicine, University of Western Australia, UWA Department of Obstetrics, King Edward Memorial Hospital, Perth, Western Australia
| | - Richard Parsons
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Medicine, University of Western Australia, UWA Department of Obstetrics, King Edward Memorial Hospital, Perth, Western Australia
| | - Gavin D Leslie
- Burn Injury Research Unit, School of Biomedical Sciences, Faculty of Medicine, University of Western Australia, UWA Department of Obstetrics, King Edward Memorial Hospital, Perth, Western Australia
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Guest JF, Fuller GW, Vowden P. Costs and outcomes in evaluating management of unhealed surgical wounds in the community in clinical practice in the UK: a cohort study. BMJ Open 2018; 8:e022591. [PMID: 30552253 PMCID: PMC6303575 DOI: 10.1136/bmjopen-2018-022591] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE To evaluate the patient pathways and associated health outcomes, resource use and corresponding costs attributable to managing unhealed surgical wounds in clinical practice, from initial presentation in the community in the UK. METHODS This was a retrospective cohort analysis of the records of 707 patients in The Health Improvement Network (THIN) database whose wound failed to heal within 4 weeks of their surgery. Patients' characteristics, wound-related health outcomes and healthcare resource use were quantified, and the total National Health Service (NHS) cost of patient management was estimated at 2015/2016 prices. RESULTS Inconsistent terminology was used in describing the wounds. 83% of all wounds healed within 12 months from onset of community management, ranging from 86% to 74% of wounds arising from planned and emergency procedures, respectively. Mean time to healing was 4 months per patient. Patients were predominantly managed in the community by nurses and only around a half of all patients who still had a wound at 3 months were recorded as having had a follow-up visit with their surgeon. Up to 68% of all wounds may have been clinically infected at the time of presentation, and 23% of patients subsequently developed a putative wound infection a mean 4 months after initial presentation. Mean NHS cost of wound care over 12 months was £7300 per wound, ranging from £6000 to £13 700 per healed and unhealed wound, respectively. Additionally, the mean NHS cost of managing a wound without any evidence of infection was ~£2000 and the conflated cost of managing a wound with a putative infection ranged from £5000 to £11 200. CONCLUSION Surgeons are unlikely to be fully aware of the problems surrounding unhealed surgical wounds once patients are discharged into the community, due to inconsistent recording in patients' records coupled with the low rate of follow-up appointments. These findings offer the best evidence available with which to inform policy and budgetary decisions pertaining to managing unhealed surgical wounds in the community.
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Affiliation(s)
- Julian F Guest
- Catalyst Health Economics Consultants, Rickmansworth, UK
- Faculty of Life Sciences and Medicine, King's College London, London, UK
| | | | - Peter Vowden
- Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
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Townsend KL, Akeroyd J, Russell DS, Kruzic JJ, Robertson BL, Lear W. Comparing the Tolerability of a Novel Wound Closure Device Using a Porcine Wound Model. Adv Wound Care (New Rochelle) 2018; 7:177-184. [PMID: 29892494 DOI: 10.1089/wound.2017.0777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 12/22/2017] [Indexed: 11/12/2022] Open
Abstract
Objective: To compare the tolerability and mechanical tensile strength of acute skin wounds closed with nylon suture plus a novel suture bridge device (SBD) with acute skin wounds closed with nylon suture in a porcine model. Approach: Four Yucatan pigs each received 12 4.5 cm full-thickness incisions that were closed with 1 of 4 options: Suture bridge with nylon, suture bridge with nylon and subdermal polyglactin, nylon simple interrupted, and nylon simple interrupted with subdermal polyglactin. Epithelial reaction, inflammation, and scarring were examined histologically at days 10 and 42. Wound strength was examined mechanically at days 10 and 42 on ex vivo wounds from euthanized pigs. Results: Histopathology in the suture entry/exit planes showed greater dermal inflammation with a simple interrupted nylon suture retained for 42 days compared with the SBD retained for 42 days (p < 0.03). While tensile wound strength in the device and suture groups were similar at day 10, wounds closed with the devices were nearly 8 times stronger at day 42 compared with day 10 (p < 0.001). Innovation: A novel SBD optimized for cutaneous wound closure that protects the skin surface from suture strands, forms a protective bridge over the healing wound edges, and knotlessly clamps sutures. Conclusion: This study suggests that the use of a SBD increases the tolerability of nylon sutures in porcine acute skin wound closures allowing for prolonged mechanical support of the wound. For slow healing wounds, this may prevent skin wound disruption, such as edge necrosis and dehiscence.
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Affiliation(s)
- Katy L. Townsend
- Veterinary Clinical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Jen Akeroyd
- JULVIA™ Technologies, Inc., Corvallis, Oregon
| | - Duncan S. Russell
- Biomedical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Jamie J. Kruzic
- School of Mechanical and Manufacturing Engineering, UNSW Sydney, New South Wales, Australia
| | - Bria L. Robertson
- Materials Science, School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, Oregon
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Sandy-Hodgetts K, Carville K, Leslie GD. Surgical wound dehiscence: a conceptual framework for patient assessment. J Wound Care 2018; 27:119-126. [DOI: 10.12968/jowc.2018.27.3.119] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kylie Sandy-Hodgetts
- Clinical Trials Coordinator, Joondalup Health Campus, Adjunct Research Fellow, School of Anatomy, Physiology and Human Biology, University of Western Australia
| | - Keryln Carville
- Professor, Primary Health Care and Community, School of Nursing and Midwifery, Curtin University, Silver Chain Group
| | - Gavin D. Leslie
- Professor, Director of Research Training, School of Nursing and Midwifery, Curtin University
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Anthony CA, Peterson RA, Sewell DK, Polgreen LA, Simmering JE, Callaghan JJ, Polgreen PM. The Seasonal Variability of Surgical Site Infections in Knee and Hip Arthroplasty. J Arthroplasty 2018; 33:510-514.e1. [PMID: 29157786 PMCID: PMC5988362 DOI: 10.1016/j.arth.2017.10.043] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 10/20/2017] [Accepted: 10/24/2017] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Surgical site infections (SSIs) after total knee (TKA) and total hip (THA) arthroplasty are devastating to patients and costly to healthcare systems. The purpose of this study is to investigate the seasonality of TKA and THA SSIs at a national level. METHODS All data were extracted from the National Readmission Database for 2013 and 2014. Patients were included if they had undergone TKA or THA. We modeled the odds of having a primary diagnosis of SSI as a function of discharge date by month, payer status, hospital size, and various patient co-morbidities. SSI status was defined as patients who were readmitted to the hospital with a primary diagnosis of SSI within 30 days of their arthroplasty procedure. RESULTS There were 760,283 procedures (TKA 424,104, THA 336,179) in our sample. Our models indicate that SSI risk was highest for patients discharged from their surgery in June and lowest for December discharges. For TKA, the odds of a 30-day readmission for SSI were 30.5% higher at the peak compared to the nadir time (95% confidence interval [CI] 20-42). For THA, the seasonal increase in SSI was 19% (95% CI 9-30). Compared to Medicare, patients with Medicaid as the primary payer had a 49% higher odds of 30-day SSI after TKA (95% CI 32-68). CONCLUSION SSIs following TKA and THA are seasonal peaking in summer months. Payer status was also a significant risk factor for SSIs. Future studies should investigate potential factors that could relate to the associations demonstrated in this study.
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Affiliation(s)
- Chris A. Anthony
- The Department of Orthopaedic Surgery and Rehabilitation, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, 01008 JPP, Iowa City, IA 52242, USA
- Signal Center, University of Iowa Hospitals and Clinics
| | - Ryan A. Peterson
- The Department of Biostatistics, University of Iowa, 135 N. Riverside Drive, Iowa City, IA 52242, USA
- Signal Center, University of Iowa Hospitals and Clinics
| | - Daniel K. Sewell
- The Department of Biostatistics, University of Iowa, 135 N. Riverside Drive, Iowa City, IA 52242, USA
| | - Linnea A. Polgreen
- The Department of Pharmacy Practice and Science, University of Iowa, 115 S. Grand Ave., Iowa City, IA 52242, USA
| | | | - John J. Callaghan
- The Department of Orthopaedic Surgery and Rehabilitation, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, 01008 JPP, Iowa City, IA 52242, USA
| | - Philip M. Polgreen
- Departments of Internal Medicine and Epidemiology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USA
- Signal Center, University of Iowa Hospitals and Clinics
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The Seasonal Variability in Surgical Site Infections and the Association With Warmer Weather: A Population-Based Investigation. Infect Control Hosp Epidemiol 2017; 38:809-816. [PMID: 28506327 DOI: 10.1017/ice.2017.84] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To determine whether the seasonality of surgical site infections (SSIs) can be explained by changes in temperature. DESIGN Retrospective cohort analysis. SETTING The National Inpatient Sample database. PATIENTS All hospital discharges with a primary diagnosis of SSI from 1998 to 2011 were considered cases. Discharges with a primary or secondary diagnoses of specific surgeries commonly associated with SSIs from the previous and current month served as our "at risk" cohort. METHODS We modeled the national monthly count of SSI cases both nationally and stratified by region, sex, age, and type of institution. We used data from the National Climatic Data Center to estimate the monthly average temperatures for all hospital locations. We modeled the odds of having a primary diagnosis of SSI as a function of demographics, payer, location, patient severity, admission month, year, and the average temperature in the month of admission. RESULTS SSI incidence is highly seasonal, with the highest SSI incidence in August and the lowest in January. During the study period, there were 26.5% more cases in August than in January (95% CI, 23.3-29.7). Controlling for demographic and hospital-level characteristics, the odds of a primary SSI admission increased by roughly 2.1% per 2.8°C (5°F) increase in the average monthly temperature. Specifically, the highest temperature group, >32.2°C (>90°F), was associated with an increase in the odds of an SSI admission of 28.9% (95% CI, 20.2-38.3) compared to temperatures <4.4°C (<40°F). CONCLUSIONS At population level, SSI risk is highly seasonal and is associated with warmer weather. Infect Control Hosp Epidemiol 2017;38:809-816.
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