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Zeineddin S, Pitt JB, Carter M, Linton S, De Boer C, Ghomrawi H, Abdullah F. Rethinking hospital postoperative resource use: A national analysis of pediatric appendectomy patients admitted to children's hospitals. Surgery 2024; 176:1226-1232. [PMID: 39048332 DOI: 10.1016/j.surg.2024.06.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 06/14/2024] [Accepted: 06/16/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND The increased use of remote monitoring and telemedicine support may help alleviate the need for some of the postoperative inpatient hospital care and reduce health care costs, but little is known about current postoperative hospital resource use patterns. We aim to describe hospital resources use patterns in pediatric patients postappendectomy for complicated appendicitis and to evaluate the potential of earlier discharge with remote monitoring. METHODS This was a retrospective cohort study using the Pediatric Health Information System database for patients who underwent laparoscopic appendectomy for complicated appendicitis between 2016 and 2021. Health care use/costs (antibiotics, intravenous fluids [proxy for diet], analgesics, laboratory studies, and imaging tests) were determined using administrative billing data. Potentially avoidable days were defined as nondischarge days without codes for intravenous opioid pain medication or intravenous fluids. Descriptive statistics and logistic regression were used. RESULTS In total, 24,165 patients were included: 8,300 patients (34.3%) had at least 1 potentially avoidable hospitalization day, totaling 13,970 days or 14.2% of all hospitalization days. Median hospitalization cost was $19,434 [$15,658-$25,157], with accommodation and operating room being the greatest contributors. Public insurance and minority races and ethnicities were associated with greater odds of potentially avoidable days. More than 80% of hospitalized patients had intravenous antibiotics through 10 days postoperatively. More than 20% received opioids daily. CONCLUSIONS More than one third of the patients who underwent laparoscopic appendectomy for complicated appendicitis could have had at least 1 potentially avoidable hospitalization day. Remote monitoring and telemedicine support should be explored and could help with earlier discharge and lower costs.
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Affiliation(s)
- Suhail Zeineddin
- Division of Pediatric Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, IL. https://www.twitter.com/szeineddinMD
| | - J Benjamin Pitt
- Division of Pediatric Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, IL
| | - Michela Carter
- Division of Pediatric Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, IL
| | - Samuel Linton
- Division of Pediatric Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, IL
| | - Christopher De Boer
- Division of Pediatric Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, IL
| | - Hassan Ghomrawi
- Departments of Surgery and Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Fizan Abdullah
- Division of Pediatric Surgery, Department of Surgery, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, IL.
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Mark-Christensen A, Bro Sørensen D, Qvist N, Justesen US, Möller S, Ellebæk MB. Prognostic value of 24-hour cultivation of peritoneal fluid to distinguish complicated from uncomplicated acute appendicitis: a prospective cohort study. Langenbecks Arch Surg 2024; 409:244. [PMID: 39115580 PMCID: PMC11310272 DOI: 10.1007/s00423-024-03428-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 07/23/2024] [Indexed: 08/11/2024]
Abstract
BACKGROUND The distinction between complicated and uncomplicated acute appendicitis (AA) is important as it guides postoperative antibiotic treatment. A diagnosis based on intraoperative findings is imprecise and standard cultivation of peritoneal fluid is generally time-consuming with little clinical benefit. The aim of this study was to examine if cultivation of peritoneal fluid in acute appendicitis could reliably detect bacteria within 24 h. METHODS Patients older than 18 years undergoing laparoscopic appendectomy were prospectively enrolled at two surgical departments after informed consent was obtained. Periappendicular fluid was collected prior to appendectomy and sent for cultivation. Sensitivity, specificity and positive and negative predictive values were calculated with 95% confidence intervals (CIs) using 72-hour cultivation results as the gold standard. Patients with complicated AA as determined by the surgeon, received a three-day course of oral antibiotics. Postoperative infectious complications within 30 days after surgery were registered. RESULTS From July 2020 to January 2021, 101 patients were included. The intraoperative diagnosis was complicated AA in 34 cases. Of these patients, six (17.6%) had bacteria cultured within 24 h after surgery, leading to a sensitivity of 60% and a specificity of 100%. The positive and negative predictive values were 1.00 and 0.96, respectively. Seven patients developed a postoperative infection (five superficial wound infections and two intra-abdominal abscess). In all cases with a positive cultivation result, the intraoperative diagnosis was complicated appendicitis and a postoperative course of antibiotics prescribed. CONCLUSION Twenty-four-hour cultivation of the peritoneal fluid in acute appendicitis is a valid indicator for peritoneal bacterial contamination. Randomized studies are necessary to determine if this approach is suitable for targeting postoperative antibiotic treatment as a means to prevent overtreatment without increasing the risk of infectious complications.
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Affiliation(s)
| | | | - Niels Qvist
- Department of Surgery, Odense University Hospital, Odense, Denmark
| | - Ulrik Stenz Justesen
- Department of Clinical Microbiology, Odense University Hospital, Odense, Denmark
| | - Sören Möller
- Open Patient data Explorative Network, Odense University Hospital, Odense, Denmark
- Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
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3
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Lipping E, Saar S, Reinsoo A, Bahhir A, Kirsimägi Ü, Lepner U, Talving P. Short Postoperative Intravenous Versus Oral Antibacterial Therapy in Complicated Acute Appendicitis: A Pilot Noninferiority Randomized Trial. Ann Surg 2024; 279:191-195. [PMID: 37747168 DOI: 10.1097/sla.0000000000006103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
OBJECTIVE The purpose of this study is to investigate noninferiority of postoperative oral administration of antibiotics in complicated appendicitis. BACKGROUND Recent investigations have used exclusively intravenous administration of antibiotics when comparing outcomes of postoperative antibacterial therapy in complicated appendicitis. We hypothesized that oral antibacterial treatment results in noninferior outcomes in terms of postoperative infectious complications as intravenous treatment. METHODS In this pilot, open-label, prospective randomized trial, all consecutive adult patients with complicated appendicitis, including gangrenous appendicitis, perforated appendicitis, and appendicitis with periappendicular abscess between November 2020 and January 2023, were randomly allocated to 24-hour intravenous administration of antibiotics versus 24-hour oral administration of antibiotics after appendectomy. Primary outcomes included 30-day postoperative complications per Comprehensive Complication Index. The secondary outcome was hospital length of stay. Follow-up analysis at 30 days was conducted per intention to treat and per protocol. The study was registered at ClinicalTrials.gov (NCT04947748). RESULTS A total of 104 patients were enrolled, with 51 and 53 cases allocated to the 24-hour intravenous and the 24-hour oral treatment group, respectively. Demographic profile and disease severity score for acute appendicitis were similar between the study groups. There were no significant differences between the study groups in terms of 30-day postoperative complications. Median Comprehensive Complication Index did not differ between the study groups. Hospital length of stay was similar in both groups. CONCLUSIONS In the current pilot randomized controlled trial, the 24-hour oral antibiotic administration resulted in noninferior outcomes when compared with the 24-hour intravenous administration of antibiotics after laparoscopic appendectomy in complicated appendicitis.
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Affiliation(s)
- Edgar Lipping
- Division of Acute Care Surgery, North Estonia Medical Centre, Tallinn, Estonia
- Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Sten Saar
- Division of Acute Care Surgery, North Estonia Medical Centre, Tallinn, Estonia
- Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Arvo Reinsoo
- Division of Acute Care Surgery, North Estonia Medical Centre, Tallinn, Estonia
- Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Artjom Bahhir
- Division of Acute Care Surgery, North Estonia Medical Centre, Tallinn, Estonia
- Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Ülle Kirsimägi
- Faculty of Medicine, University of Tartu, Tartu, Estonia
- Department of Surgery, Tartu University Hospital, Tartu, Estonia
| | - Urmas Lepner
- Faculty of Medicine, University of Tartu, Tartu, Estonia
- Department of Surgery, Tartu University Hospital, Tartu, Estonia
| | - Peep Talving
- Division of Acute Care Surgery, North Estonia Medical Centre, Tallinn, Estonia
- Faculty of Medicine, University of Tartu, Tartu, Estonia
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Fansiwala K, Rusher A, Shore B, Herfarth HH, Barnes E, Kochar B, Chang S. Oral vs Intravenous Discharge Antibiotic Regimens in the Management of Intra-abdominal Abscesses in Penetrating Crohn's Disease. Inflamm Bowel Dis 2023:izad299. [PMID: 38150318 DOI: 10.1093/ibd/izad299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Indexed: 12/29/2023]
Abstract
BACKGROUND Antibiotics are a cornerstone in management of intra-abdominal abscesses in Crohn's disease (CD). Yet, the optimal route of antibiotic administration is poorly studied. We aimed to compare surgical and nonsurgical readmission outcomes for patients hospitalized for intra-abdominal abscesses from CD discharged on oral (PO) or intravenous (IV) antibiotics. METHODS Data for patients with CD hospitalized for an intra-abdominal abscess were obtained from 3 institutions from January 2010 to December 2020. Baseline patient characteristics were obtained. Primary outcomes of interest included need for surgery and hospital readmission within 1 year from hospital discharge. We used multivariable logistic regression models and Cox regression analysis to adjust for abscess size, history of prior surgery, history of penetrating disease, and age. RESULTS We identified 99 patients discharged on antibiotics (PO = 74, IV = 25). Readmissions related to CD at 12 months were less likely in the IV group (40% vs 77% PO, P = .01), with the IV group demonstrating a decreased risk for nonsurgical readmissions over time (hazard ratio, 0.376; 95% confidence interval, 0.176-0.802). Requirement for surgery was similar between the groups. There were no differences in time to surgery between groups. CONCLUSIONS In this retrospective, multicenter cohort of CD patients with intra-abdominal abscess, surgical outcomes were similar between patients receiving PO vs IV antibiotics at discharge. Patients treated with IV antibiotics demonstrated a decreased risk for nonsurgical readmission. Further prospective trials are needed to better delineate optimal route of antibiotic administration in patients with penetrating CD.
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Affiliation(s)
- Kush Fansiwala
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Alison Rusher
- Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA
| | - Brandon Shore
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Hans H Herfarth
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Edward Barnes
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Bharati Kochar
- Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA
| | - Shannon Chang
- Inflammatory Bowel Disease Center, Division of Gastroenterology, NYU Grossman School of Medicine, New York, NY, USA
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Fonnes S, Roepstorff S, Holzknecht BJ, Olesen CS, Olsen JHH, Schmidt L, Alder R, Gamborg S, Rasmussen T, Arpi M, Jørgensen LN, Rosenberg J. Shorter Total Length of Stay After Intraperitoneal Fosfomycin, Metronidazole, and Molgramostim for Complicated Appendicitis: A Pivotal Quasi-Randomized Controlled Trial. Front Surg 2020; 7:25. [PMID: 32432123 PMCID: PMC7214811 DOI: 10.3389/fsurg.2020.00025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 04/14/2020] [Indexed: 11/13/2022] Open
Abstract
Background: We aimed to investigate the difference in the total length of hospital stay (LOS) after intraperitoneal vs. intravenous antibiotic treatment in patients with complicated appendicitis. Methods: We conducted a quasi-randomized prospective clinical trial. The intervention group received 4 g fosfomycin, 1 g metronidazole, and 50 μg recombinant human granulocyte-macrophage colony-stimulating factor intraperitoneally, which was left in the abdominal cavity, immediately after laparoscopic appendectomy. Postoperatively, this group received antibiotics orally. The control group received intravenous antibiotics both during surgery and postoperatively. We primarily evaluated total LOS within 30 days. Furthermore, we evaluated harms and adverse events, Gastrointestinal Quality of Life Index, postoperative complications, and convalescence. Participants were followed for 30 days postoperatively. Results: A total of 12 participants concluded the trial. The total LOS was significantly shorter in the intervention group (six participants, median 13 h; range 2–21 h) than in the control group (six participants, median 84 h; range 67–169 h), p = 0.017. Comparable harms and Gastrointestinal Quality of Life Index scores were found in the two groups. The time to return to normal activities was median 6 and 10 days for the intervention and the control group, respectively. There were no serious adverse events related to the trial nor any complications in the intervention group. In the control group, two patients developed intraabdominal abscesses. Conclusions: The intervention group had a significantly shorter total LOS. The study was not powered to assess differences in complications, but the results indicate that the intervention seems to be a safe regimen, which can be investigated further to treat patients with complicated appendicitis. Identifiers: EudraCT no. 2017-004753-16. ClinicalTrials:https://clinicaltrials.gov/ct2/show/NCT03435900?term=NCT03435900&draw=2&rank=1">draw=2&rank=1.
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Affiliation(s)
- Siv Fonnes
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Søren Roepstorff
- Digestive Disease Centre, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Barbara Juliane Holzknecht
- Department of Clinical Microbiology, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Christoffer Skov Olesen
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Joachim Hjalde Halmsted Olsen
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Line Schmidt
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Rasmus Alder
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Sara Gamborg
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Tilde Rasmussen
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Magnus Arpi
- Department of Clinical Microbiology, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | | | - Jacob Rosenberg
- Department of Surgery, Centre for Perioperative Optimisation, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
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Bou Zein Eddine S, Dodgion CM, Qian S, Trevino C, De Moya MA, Yeh DD. Complicated Appendicitis: Are Extended Antibiotics Necessary? A Post Hoc Analysis of the EAST Appendicitis "MUSTANG" Study. J Surg Res 2019; 247:508-513. [PMID: 31812337 DOI: 10.1016/j.jss.2019.09.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 08/22/2019] [Accepted: 09/25/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND The need for extended postoperative antibiotics (Abx) for complicated (gangrenous or perforated) appendicitis (CA) remains unclear. We hypothesize that giving ≤24 h of Abx for CA is not inferior to a longer duration in preventing infectious complications after appendectomy. METHODS In this post hoc analysis of a prospective multicenter study, only patients with intraoperative diagnosis of CA were included. ANOVA and Chi-squared tests were used to compare length of stay, 30-day readmission rates, surgical site infection (SSI), and intra-abdominal abscess (IAA) between patients receiving ≥96 h and ≤24 h of Abx. RESULTS Of 751 patients with CA, 704 met inclusion criteria. Mean age was 48 (±17) y; 391 (56%) were male. A total of 185 (26%) received Abx for ≤24 h and 100 (14% of overall) received no Abx. 85 (12%) patients were lost to follow-up at 30 d postop. Twenty-seven (4%) patients developed an SSI (≤24 h = 5 (3%), ≥96 h = 22 (5%), P = 0.502) and 82 (13%) developed IAA (≤24 h = 11 (7%), ≥96 h = 71 (15%), P = 0.008) within 30d postop. Sixty-six (11%) patients underwent a secondary intervention for infection within 30 d postop. 41% of SSIs (11/27) and 60% (49/82) of IAA occurred during the index hospitalization. On the multivariate analysis, there was not any evidence of an association between the duration of Abx and an increased rate of SSI (P = 0.539), IAA (P = 0.274), emergency department visits (P = 0.509), readmission (P = 0.911), or secondary interventions (P = 0.523). CONCLUSIONS No evidence of an association between the duration of Abx (≤24 h versus ≥ 96 h) for complicated appendicitis and an increased rate of SSI was observed and ≤24 h duration was associated with shorter length of stay. Because of possible selection bias, adequately powered randomized trials are required to definitely prove noninferiority of shorter course Abx duration.
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Affiliation(s)
- Savo Bou Zein Eddine
- Division of Trauma and Acute Care Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Christopher M Dodgion
- Division of Trauma and Acute Care Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin.
| | - Sinong Qian
- Ryder Trauma Center, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida
| | - Colleen Trevino
- Division of Trauma and Acute Care Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Marc A De Moya
- Division of Trauma and Acute Care Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - D Dante Yeh
- Ryder Trauma Center, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida
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van den Boom AL, de Wijkerslooth EML, van Rosmalen J, Beverdam FH, Boerma EJG, Boermeester MA, Bosmans JWAM, Burghgraef TA, Consten ECJ, Dawson I, Dekker JWT, Emous M, van Geloven AAW, Go PMNYH, Heijnen LA, Huisman SA, Jean Pierre D, de Jonge J, Kloeze JH, Koopmanschap MA, Langeveld HR, Luyer MDP, Melles DC, Mouton JW, van der Ploeg APT, Poelmann FB, Ponten JEH, van Rossem CC, Schreurs WH, Shapiro J, Steenvoorde P, Toorenvliet BR, Verhelst J, Versteegh HP, Wijnen RMH, Wijnhoven BPL. Two versus five days of antibiotics after appendectomy for complex acute appendicitis (APPIC): study protocol for a randomized controlled trial. Trials 2018; 19:263. [PMID: 29720238 PMCID: PMC5932884 DOI: 10.1186/s13063-018-2629-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 04/04/2018] [Indexed: 12/17/2022] Open
Abstract
Background Acute appendicitis is one of the most common indications for emergency surgery. In patients with a complex appendicitis, prolonged antibiotic prophylaxis is recommended after appendectomy. There is no consensus regarding the optimum duration of antibiotics. Guidelines propose 3 to 7 days of treatment, but shorter courses may be as effective in the prevention of infectious complications. At the same time, the global issue of increasing antimicrobial resistance urges for optimization of antibiotic strategies. The aim of this study is to determine whether a short course (48 h) of postoperative antibiotics is non-inferior to current standard practice of 5 days. Methods Patients of 8 years and older undergoing appendectomy for acute complex appendicitis – defined as a gangrenous and/or perforated appendicitis or appendicitis in presence of an abscess – are eligible for inclusion. Immunocompromised or pregnant patients are excluded, as well as patients with a contraindication to the study antibiotics. In total, 1066 patients will be randomly allocated in a 1:1 ratio to the experimental treatment arm (48 h of postoperative intravenously administered (IV) antibiotics) or the control arm (5 days of postoperative IV antibiotics). After discharge from the hospital, patients participate in a productivity-cost-questionnaire at 4 weeks and a standardized telephone follow-up at 90 days after appendectomy. The primary outcome is a composite endpoint of infectious complications, including intra-abdominal abscess (IAA) and surgical site infection (SSI), and mortality within 90 days after appendectomy. Secondary outcomes include IAA, SSI, restart of antibiotics, length of hospital stay (LOS), reoperation, percutaneous drainage, readmission rate, and cost-effectiveness. The non-inferiority margin for the difference in the primary endpoint rate is set at 7.5% (one-sided test at ɑ 0.025). Both per-protocol and intention-to-treat analyses will be performed. Discussion This trial will provide evidence on whether 48 h of postoperative antibiotics is non-inferior to a standard course of 5 days of antibiotics. If non-inferiority is established, longer intravenous administration following appendectomy for complex appendicitis can be abandoned, and guidelines need to be adjusted accordingly. Trial registration Dutch Trial Register, NTR6128. Registered on 20 December 2016. Electronic supplementary material The online version of this article (10.1186/s13063-018-2629-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anne Loes van den Boom
- Department of Surgery, Erasmus MC - University Medical Centre Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Elisabeth M L de Wijkerslooth
- Department of Surgery, Erasmus MC - University Medical Centre Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Joost van Rosmalen
- Department of Biostatistics, Erasmus MC - University Medical Centre, Rotterdam, The Netherlands
| | | | | | - Marja A Boermeester
- Department of Surgery, Academisch Medisch Centrum, Amsterdam, The Netherlands
| | | | | | | | - Imro Dawson
- Department of Surgery, IJsselland Ziekenhuis, Capelle a/d IJssel, The Netherlands
| | | | - Marloes Emous
- Department of Surgery, MC Leeuwarden, Leeuwarden, The Netherlands
| | | | - Peter M N Y H Go
- Department of Surgery, St. Antonius Ziekenhuis, Nieuwegein, The Netherlands
| | - Luc A Heijnen
- Department of Surgery, Noordwest Ziekenhuisgroep, Alkmaar, The Netherlands
| | - Sander A Huisman
- Department of Surgery, Franciscus Gasthuis & Vlietland, Rotterdam, The Netherlands
| | | | - Joske de Jonge
- Department of Surgery, Tergooi, Hilversum/Blaricum, The Netherlands
| | - Jurian H Kloeze
- Department of Surgery, Medisch Spectrum Twente, Enschede, The Netherlands
| | - Marc A Koopmanschap
- Erasmus School of Health Policy and Management, Erasmus University, Rotterdam, The Netherlands
| | - Hester R Langeveld
- Department of Pediatric Surgery, Erasmus MC - University Medical Centre, Rotterdam, The Netherlands
| | - Misha D P Luyer
- Department of Surgery, Catharina Ziekenhuis, Eindhoven, The Netherlands
| | - Damian C Melles
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC - University Medical Centre, Rotterdam, The Netherlands
| | - Johan W Mouton
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC - University Medical Centre, Rotterdam, The Netherlands
| | | | | | - Jeroen E H Ponten
- Department of Surgery, Catharina Ziekenhuis, Eindhoven, The Netherlands
| | | | | | - Joël Shapiro
- Department of Surgery, IJsselland Ziekenhuis, Capelle a/d IJssel, The Netherlands
| | - Pascal Steenvoorde
- Department of Surgery, Medisch Spectrum Twente, Enschede, The Netherlands
| | | | - Joost Verhelst
- Department of Surgery, Ikazia Ziekenhuis, Rotterdam, The Netherlands
| | - Hendt P Versteegh
- Department of Surgery, Reinier de Graaf Gasthuis, Delft, The Netherlands
| | - Rene M H Wijnen
- Department of Pediatric Surgery, Erasmus MC - University Medical Centre, Rotterdam, The Netherlands
| | - Bas P L Wijnhoven
- Department of Surgery, Erasmus MC - University Medical Centre Rotterdam, PO Box 2040, 3000 CA, Rotterdam, The Netherlands
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