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Dive into the research topics where R. Lawrence Moss is active.

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Featured researches published by R. Lawrence Moss.


Journal of Pediatric Surgery | 1996

Necrotizing fasciitis in children: Prompt recognition and aggressive therapy improve survival

R. Lawrence Moss; Catherine A. Musemeche; Ann M. Kosloske

UNLABELLEDnNecrotizing fasciitis (NF) is a bacterial infection of the soft tissues with a fulminant course and a high mortality rate. The authors performed a review to define the diagnosis, bacteriology, and management of NF in the pediatric population. This report of 20 cases treated over 18 years represents the largest reported pediatric experience. These infections were attributable to secondary infection of varicella lesions (5), omphalitis (4), extremity lesions (4), perineal infections (3), head and neck lesions (2), inguinal herniorrhapy (1), and breast abscess (1). Nineteen of the 20 children were healthy, without chronic disease or immunosuppression. All patients presented with an altered sensorium and signs of systemic toxicity. Fever (40%), tachycardia (70%), and abnormal white blood cell count (50%) were not uniformly present. There was marked tissue edema in all patients, with a characteristic peau dorange appearance in 18. Seven infections were caused by streptococcus; the remainder were polymicrobial, involving multiple aerobes and anaerobes. Initial gram stain was of limited utility; in 14 of 19 cases the result was negative or showed only one of many organisms present. Fifteen patients survived and five died. All survivors underwent aggressive surgical debridement within 3 hours of admission. The survivors required of a mean of 3.8 operations. Fascial excision of up to 35% of total body surface area was required. One patient required amputation, two had colostomies, and six required extensive skin grafting for reconstruction. All five patients who died had delayed initial management.nnnCONCLUSIONnNF is a serious cause of death in previously healthy children. The diagnosis should be considered in the presence of any soft tissue infection presenting with signs of toxicity and marked wound edema, even in the absence of fever or abnormal white blood cell count. Immediate surgical debridement and coverage with penicillin, an aminoglycoside, and metronidazole are essential. Subsequent changes in antibiotics should be based on culture data because gram stain results are not reliable. More than one operation is required in almost all cases.


Journal of The American College of Surgeons | 2014

Feasibility of a Nonoperative Management Strategy for Uncomplicated Acute Appendicitis in Children

Peter C. Minneci; Jason P. Sulkowski; Kristine M. Nacion; Justin B. Mahida; Jennifer N. Cooper; R. Lawrence Moss; Katherine J. Deans

BACKGROUNDnFor decades, urgent operation has been considered the only appropriate management of acute appendicitis in children. The purpose of this study was to investigate the feasibility of nonoperative management of uncomplicated acute appendicitis in children.nnnSTUDY DESIGNnA prospective nonrandomized clinical trial of children with uncomplicated acute appendicitis comparing nonoperative management with urgent appendectomy was performed. The primary result was 30-day success rate of nonoperative management. Secondary outcomes included comparisons of disability days, missed school days, hospital length of stay, and measures of quality of life and health care satisfaction.nnnRESULTSnSeventy-seven patients were enrolled during October 2012 to October 2013; 30 chose nonoperative management and 47 chose surgery. There were no significant differences in demographic or clinical characteristics. The immediate and 30-day success rates of nonoperative management were 93% (28 of 30) and 90% (27 of 30). There was no evidence of progression of appendicitis to rupture at the time of surgery in the 3 patients for whom nonoperative management failed. Compared with the surgery group, the nonoperative group had fewer disability days (3 vs 17 days; p < 0.0001), returned to school more quickly (3 vs 5 days; p = 0.008), and exhibited higher quality of life scores in both the child (93 vs 88; p = 0.01) and the parent (96 vs 90; p = 0.03), but incurred a longer length of stay (38 vs 20 hours; p < 0.0001).nnnCONCLUSIONSnNonoperative management of uncomplicated acute appendicitis in children is feasible, with a high 30-day success rate and short-term benefits that include quicker recovery and improved quality of life scores. Additional follow-up will allow for determination of longer-term success rate, safety, and cost effectiveness.


JAMA Surgery | 2016

Effectiveness of Patient Choice in Nonoperative vs Surgical Management of Pediatric Uncomplicated Acute Appendicitis

Peter C. Minneci; Justin B. Mahida; Daniel L. Lodwick; Jason P. Sulkowski; Kristine M. Nacion; Jennifer N. Cooper; Erica J. Ambeba; R. Lawrence Moss; Katherine J. Deans

IMPORTANCEnCurrent evidence suggests that nonoperative management of uncomplicated appendicitis is safe, but overall effectiveness is determined by combining medical outcomes with the patients and familys perspective, goals, and expectations.nnnOBJECTIVEnTo determine the effectiveness of patient choice in nonoperative vs surgical management of uncomplicated acute appendicitis in children.nnnDESIGN, SETTING, AND PARTICIPANTSnProspective patient choice cohort study in patients aged 7 to 17 years with acute uncomplicated appendicitis presenting at a single pediatric tertiary acute care hospital from October 1, 2012, through March 6, 2013. Participating patients and families gave informed consent and chose between nonoperative management and urgent appendectomy.nnnINTERVENTIONSnUrgent appendectomy or nonoperative management entailing at least 24 hours of inpatient observation while receiving intravenous antibiotics and, on demonstrating improvement of symptoms, completion of 10 days of treatment with oral antibiotics.nnnMAIN OUTCOMES AND MEASURESnThe primary outcome was the 1-year success rate of nonoperative management. Successful nonoperative management was defined as not undergoing an appendectomy. Secondary outcomes included comparisons of the rates of complicated appendicitis, disability days, and health care costs between nonoperative management and surgery.nnnRESULTSnA total of 102 patients were enrolled; 65 patients/families chose appendectomy (median age, 12 years; interquartile range [IQR], 9-13 years; 45 male [69.2%]) and 37 patients/families chose nonoperative management (median age, 11 years; IQR, 10-14 years; 24 male [64.9%]). Baseline characteristics were similar between the groups. The success rate of nonoperative management was 89.2% (95% CI, 74.6%-97.0%) at 30 days (33 of 37 children) and 75.7% (95% CI, 58.9%-88.2%) at 1 year (28 of 37 children). The incidence of complicated appendicitis was 2.7% in the nonoperative group (1 of 37 children) and 12.3% in the surgery group (8 of 65 children) (Pu2009=u2009.15). After 1 year, children managed nonoperatively compared with the surgery group had fewer disability days (median [IQR], 8 [5-18] vs 21 [15-25] days, respectively; Pu2009<u2009.001) and lower appendicitis-related health care costs (median [IQR],


Pediatrics | 2013

Risk-Adjusted Hospital Outcomes for Children’s Surgery

Jacqueline M. Saito; Li Ern Chen; Bruce L. Hall; Kari Kraemer; Douglas C. Barnhart; Claudia M. Byrd; Mark E. Cohen; Chunyuan Fei; Kurt F. Heiss; Kristopher M. Huffman; Clifford Y. Ko; Melissa S. Latus; John G. Meara; Keith T. Oldham; Mehul V. Raval; Karen Richards; Rahul K. Shah; Laura C. Sutton; Charles D. Vinocur; R. Lawrence Moss

4219 [


Seminars in Pediatric Surgery | 1999

New Approaches to Understanding the Etiology and Treatment of Total Parenteral Nutrition-Associated Cholestasis

R. Lawrence Moss; Lisa A. Amii

2514-


The Journal of Pediatrics | 2014

Urine Protein Biomarkers for the Diagnosis and Prognosis of Necrotizing Enterocolitis in Infants

Karl G. Sylvester; Xuefeng B. Ling; Gigi Liu; Zachary J. Kastenberg; Jun Ji; Zhongkai Hu; Shuaibin Wu; Sihua Peng; Fizan Abdullah; Mary L. Brandt; Richard A. Ehrenkranz; Mary Catherine Harris; Timothy Lee; B. Joyce Simpson; Corinna Bowers; R. Lawrence Moss

7795] vs


Journal of The American College of Surgeons | 2013

Multicenter Study of Pectus Excavatum, Final Report: Complications, Static/Exercise Pulmonary Function, and Anatomic Outcomes

Robert E. Kelly; Robert B. Mellins; Robert C. Shamberger; Karen Mitchell; M. Louise Lawson; Keith T. Oldham; Richard G. Azizkhan; Andre Hebra; Donald Nuss; Michael J. Goretsky; Ronald J. Sharp; George Holcomb; Walton K.T. Shim; Stephen M. Megison; R. Lawrence Moss; Annie Fecteau; Paul M. Colombani; Dan M. Cooper; Traci Bagley; Amy Quinn; Alan B. Moskowitz; James F. Paulson

5029 [


Seminars in Pediatric Surgery | 2000

Meconium Diseases in Infants With very Low Birth Weight

Reed A. Dimmitt; R. Lawrence Moss

4596-


Journal of Surgical Research | 2012

Factors associated with imaging modality choice in children with appendicitis

Mehul V. Raval; Katherine J. Deans; Shawn J. Rangel; Kelly J. Kelleher; R. Lawrence Moss

5482], respectively; Pu2009=u2009.01).nnnCONCLUSIONS AND RELEVANCEnWhen chosen by the family, nonoperative management is an effective treatment strategy for children with uncomplicated acute appendicitis, incurring less morbidity and lower costs than surgery.nnnTRIAL REGISTRATIONnclinicaltrials.gov Identifier: NCT01718275.


Gut | 2014

A novel urine peptide biomarker-based algorithm for the prognosis of necrotising enterocolitis in human infants.

Karl G. Sylvester; Xuefeng B. Ling; Gigi Liu; Zachary J. Kastenberg; Jun Ji; Zhongkai Hu; Sihua Peng; Ken Lau; Fizan Abdullah; Mary L. Brandt; Richard A. Ehrenkranz; Mary Catherine Harris; Timothy C. Lee; Joyce Simpson; Corinna Bowers; R. Lawrence Moss

BACKGROUND The American College of Surgeons National Surgical Quality Improvement Program-Pediatric was initiated in 2008 to drive quality improvement in children’s surgery. Low mortality and morbidity in previous analyses limited differentiation of hospital performance. METHODS: Participating institutions included children’s units within general hospitals and free-standing children’s hospitals. Cases selected by Current Procedural Terminology codes encompassed procedures within pediatric general, otolaryngologic, orthopedic, urologic, plastic, neurologic, thoracic, and gynecologic surgery. Trained personnel abstracted demographic, surgical profile, preoperative, intraoperative, and postoperative variables. Incorporating procedure-specific risk, hierarchical models for 30-day mortality and morbidities were developed with significant predictors identified by stepwise logistic regression. Reliability was estimated to assess the balance of information versus error within models. RESULTS: In 2011, 46u2009281 patients from 43 hospitals were accrued; 1467 codes were aggregated into 226 groupings. Overall mortality was 0.3%, composite morbidity 5.8%, and surgical site infection (SSI) 1.8%. Hierarchical models revealed outlier hospitals with above or below expected performance for composite morbidity in the entire cohort, pediatric abdominal subgroup, and spine subgroup; SSI in the entire cohort and pediatric abdominal subgroup; and urinary tract infection in the entire cohort. Based on reliability estimates, mortality discriminates performance poorly due to very low event rate; however, reliable model construction for composite morbidity and SSI that differentiate institutions is feasible. CONCLUSIONS: The National Surgical Quality Improvement Program-Pediatric expansion has yielded risk-adjusted models to differentiate hospital performance in composite and specific morbidities. However, mortality has low utility as a children’s surgery performance indicator. Programmatic improvements have resulted in actionable data.

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Shawn J. Rangel

Boston Children's Hospital

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Bruce L. Hall

American College of Surgeons

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Clifford Y. Ko

University of California

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Kari Kraemer

American College of Surgeons

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Mark E. Cohen

American College of Surgeons

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Anne M. Stey

Icahn School of Medicine at Mount Sinai

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Charles D. Vinocur

Alfred I. duPont Hospital for Children

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