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Article ; Online: Principles and theory of surgical education.

Blackburn, Simon

2020 Volume 29, Issue 2, Page(s) 150901

MeSH term(s)	Education, Medical, Graduate/methods ; Humans ; Learning ; Pediatrics/education ; Psychological Theory ; Specialties, Surgical/education ; United Kingdom
Language	English
Publishing date	2020-04-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	1133381-9
ISSN	1532-9453 ; 1055-8586
ISSN (online)	1532-9453
ISSN	1055-8586
DOI	10.1016/j.sempedsurg.2020.150901
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Book ; Online: The capacity of a finite field matrix channel

Blackburn, Simon R. / Claridge, Jessica

2022

Abstract: The Additive-Multiplicative Matrix Channel (AMMC) was introduced by Silva, Kschischang and K\"otter in 2010 to model data transmission using random linear network coding. The input and output of the channel are $n\times m$ matrices over a finite field $\ ... ...

Abstract	The Additive-Multiplicative Matrix Channel (AMMC) was introduced by Silva, Kschischang and K\"otter in 2010 to model data transmission using random linear network coding. The input and output of the channel are $n\times m$ matrices over a finite field $\mathbb{F}_q$. On input the matrix $X$, the channel outputs $Y=A(X+W)$ where $A$ is a uniformly chosen $n\times n$ invertible matrix over $\mathbb{F}_q$ and where $W$ is a uniformly chosen $n\times m$ matrix over $\mathbb{F}_q$ of rank $t$. Silva \emph{et al} considered the case when $2n\leq m$. They determined the asymptotic capacity of the AMMC when $t$, $n$ and $m$ are fixed and $q\rightarrow\infty$. They also determined the leading term of the capacity when $q$ is fixed, and $t$, $n$ and $m$ grow linearly. We generalise these results, showing that the condition $2n\geq m$ can be removed. (Our formula for the capacity falls into two cases, one of which generalises the $2n\geq m$ case.) We also improve the error term in the case when $q$ is fixed. Comment: 32 pages, 1 figure. Minor typos corrected
Keywords	Computer Science - Information Theory ; Computer Science - Discrete Mathematics ; Mathematics - Combinatorics ; 94A40
Subject code	003
Publishing date	2022-10-25
Publishing country	us
Document type	Book ; Online
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Article ; Online: Transitional Care In Patients With Hirschsprung Disease: Those Left Behind.

Thompson, David S / Davidson, Joseph R / Ford, Kathryne / Loukogeorgakis, Stavros / Eaton, Simon / Blackburn, Simon / Curry, Joseph

Diseases of the colon and rectum

2024

Abstract: Background: The long term effects of Hirschsprung disease are clinically variable. Improved understanding of challenges patients may face as adults can help inform transitional care management.: Objective: To explore the outcomes and transitional ... ...

Abstract	Background: The long term effects of Hirschsprung disease are clinically variable. Improved understanding of challenges patients may face as adults can help inform transitional care management. Objective: To explore the outcomes and transitional care experiences in adult patients with Hirschsprung. Design: Cohort study. Setting: Single center. Patients: All patients treated for Hirschsprung 1977-2001 (aged >18 at time of survey July 2018-2019). Eligible patients were sent validated multi-domain surveys as well as qualitative questions regarding their transitional care. Main outcome measures: Status of transitional care, bowel function and quality of life assessment. Qualitative analysis of transitional care experience. Results: Of 139 patients, 20 had received transition care (10 had at least 1 visit but had been discharged and 10 were receiving ongoing follow-up). These patients had inferior bowel function and quality of life scores at follow-up. Twenty-three (17%) patients had issues with soiling at time of discharge, 7 received transitional care. Of these, 9/23 (39%) had a normal bowel function score (≥17), 5/23 (22%) had a poor score (<12) and one patient had since had a stoma formation. Eighteen (13%) patients had active moderate-severe issues related to bowel function, only 5 had been transitioned, and just 2 remained under ongoing care. Importantly, when these patients were discharged from our pediatric center, at a median age of 14 (IQR 12-16) years, 10/17 had no perceptible bowel issues, suggesting a worsening of function after discharge. Limitations: The retrospective design and reliance on clinical notes to gather information of discharge status as well as patient recall of events. Conclusion: There remains a small but significant proportion of Hirschsprung patients for whom bowel function either remains or becomes a major burden. These results support a need to better stratify patients requiring transitional care, and ensure a clear route to care if their status changes after discharge. See Video Abstract.
Language	English
Publishing date	2024-04-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	212581-x
ISSN	1530-0358 ; 0012-3706
ISSN (online)	1530-0358
ISSN	0012-3706
DOI	10.1097/DCR.0000000000003208
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Article ; Online: Term newborns with bilious vomiting: when should they see a surgeon and how soon?

Blackburn, Simon C

Archives of disease in childhood

2015 Volume 100, Issue 1, Page(s) 1–2

MeSH term(s)	Humans ; Intestinal Obstruction/diagnosis ; Vomiting/diagnosis
Language	English
Publishing date	2015-01
Publishing country	England
Document type	Comment ; Editorial
ZDB-ID	524-1
ISSN	1468-2044 ; 0003-9888 ; 1359-2998
ISSN (online)	1468-2044
ISSN	0003-9888 ; 1359-2998
DOI	10.1136/archdischild-2014-307251
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Article ; Online: Partial urogenital mobilization in cloacal malformation: is it a viable option?

Al-Soudan Al-Anazi, Naser / Curry, Joe / Blackburn, Simon / Desai, Divyesh / Cherian, Abraham

Journal of pediatric urology

2023 Volume 19, Issue 5, Page(s) 516–518

Abstract: Introduction: Total Urogenital Mobilization (TUM) has been the standard surgical approach for the urogenital complex in Cloacal Malformations (CM) since its inception in 1997. Partial Urogenital Mobilization (PUM) in CM remains an under-utilized or ... ...

Abstract	Introduction: Total Urogenital Mobilization (TUM) has been the standard surgical approach for the urogenital complex in Cloacal Malformations (CM) since its inception in 1997. Partial Urogenital Mobilization (PUM) in CM remains an under-utilized or under-reported option. The main anatomical difference between TUM and PUM is the division of the pubo-urethral ligaments. Objective: We explored the feasibility of PUM in a select subset of our patients with CM and report early outcomes. Study design: We retrospectively reviewed prospectively collected data of all our CM patients who had primary reconstruction at our centre from 2012 to 2020. We included in our review the patients who underwent PUM. Mullerian abnormalities, spinal cord involvement, common channel length (CC), urethral length (UL), surgical reconstruction, and outcomes including urinary continence, recurrent UTI, ultrasound and preoperative DMSA/MAG3, cystovaginoscopy post-reconstruction, and post-void residuals were noted. Results: Fifty-three patients had primary reconstruction, and of these, eleven had a common channel less than 3 cm. Of the eleven, only one underwent TUM. In the PUM group, two underwent filum untethering (20%). Mullerian duplication was noted in 5 patients (50%). The median CC length = 1.6 cm (range = 1.5cm-2.7 cm), and median UL = 1.5 cm (range = 1.5cm-2.5 cm). Follow-up ranged from 9 to 134months (median = 63months). Post-reconstruction all had a separate urethral and vaginal opening on examination and cysto-vaginoscopy. The continence outcomes are summarized in Fig.1. Discussion: Although TUM is the most common solution for the urogenital complex in CM, a subset would be suitable for PUM, and this option is under-utilized or under-reported in literature. We presume that many who had TUM probably only needed a PUM, and therefore could report better outcomes from a bladder function aspect. It is important to differentiate the two, and outcomes should be appropriately categorized. Our default approach is a PUM in all CM with less than 3 cm common channel. Only the lateral and posterior aspects of the urogenital complex are mobilized and if the urethra did not reach a satisfactory level for easy intermittent catheterization, then we proceed to a TUM dividing the pubo-urethral ligaments. PUM avoids the potential complications related to dividing the pubo-urethral ligament in TUM. It may also avoid the need for CIC which is encountered in patients who undergo TUM. Conclusion: PUM is a viable alternative in cloacal malformations with good outcomes in those with a common channel under 3 cm. This of course requires appropriate patient selection and accurate categorization of interventions to understand the true outcomes.
MeSH term(s)	Animals ; Female ; Humans ; Cloaca/surgery ; Endoscopy ; Retrospective Studies ; Urethra/surgery ; Urethra/abnormalities ; Vagina/surgery
Language	English
Publishing date	2023-05-23
Publishing country	England
Document type	Journal Article
ZDB-ID	2237683-5
ISSN	1873-4898 ; 1477-5131
ISSN (online)	1873-4898
ISSN	1477-5131
DOI	10.1016/j.jpurol.2023.05.011
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Article ; Online: Long-Term Functional Outcomes and Multidisciplinary Management after Ileorectal Duhamel Pull-Through for Total Colonic Aganglionosis-20-Year Experience in a Tertiary Surgical Center.

Bhandarkar, Kailas / De Coppi, Paolo / Cross, Kate / Blackburn, Simon / Curry, Joe

European journal of pediatric surgery : official journal of Austrian Association of Pediatric Surgery ... [et al] = Zeitschrift fur Kinderchirurgie

2023

Abstract: Introduction: Management of patients with total colonic aganglionosis (TCA) is challenging for pediatric surgeons. The purpose of this study was to review our institution's 20-year experience regarding long-term outcomes and multidisciplinary team ... ...

Abstract	Introduction: Management of patients with total colonic aganglionosis (TCA) is challenging for pediatric surgeons. The purpose of this study was to review our institution's 20-year experience regarding long-term outcomes and multidisciplinary team management of these patients after an ileorectal Duhamel pull-through procedure. Materials and methods: Retrospective review was conducted for all patients diagnosed with TCA in our tertiary institution. Data were collected on demographics, clinical presentation, complications, need for additional surgery, and long-term effects on bowel function. Results: Of a total of 202 patients with Hirschsprung's disease, 13 were diagnosed with TCA (6.4%). Clinical presentation was variable. Eleven presented in neonatal period with distal bowel obstruction and two presented with constipation in early infancy. Ileorectal Duhamel pull-through was performed in all patients. Median follow-up was 13 years. Eleven are toilet trained, of whom five are fully continent. Six continue to have problems with bowel continence or constipation. One developed recurrent episode of Hirschsprung's associated enterocolitis. Two patients had stoma re-established. Patients experiencing difficulties in bowel function are jointly managed by a multidisciplinary team consisting of surgeons, gastroenterologists, pediatric psychologists, and clinical nurse specialists. Conclusion: TCA can be associated with significant long-term morbidity. Nearly half of the patients in this series have ongoing problems with bowel continence requiring a permanent stoma in some. Diligent follow-up coupled with inputs of a multidisciplinary team has greatly helped manage these complex patients in our institution.
Language	English
Publishing date	2023-12-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	1065043-x
ISSN	1439-359X ; 0939-7248 ; 0939-6764 ; 0930-7249
ISSN (online)	1439-359X
ISSN	0939-7248 ; 0939-6764 ; 0930-7249
DOI	10.1055/a-2181-2065
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Book ; Online: Inglenook Shunting Puzzles

Blackburn, Simon R.

2018

Abstract: An inglenook puzzle is a classic shunting (switching) puzzle often found on model railway layouts. A collection of wagons sits in a fan of sidings with a limited length headshunt (lead track). The aim of the puzzle is to rearrange the wagons into a ... ...

Abstract	An inglenook puzzle is a classic shunting (switching) puzzle often found on model railway layouts. A collection of wagons sits in a fan of sidings with a limited length headshunt (lead track). The aim of the puzzle is to rearrange the wagons into a desired order (often a randomly chosen order). This article answers the question: When can you be sure this can always be done? The problem of finding a solution in a minimum number of moves is also addressed. Comment: 23 pages, 4 figures. Minor typos in previous version corrected
Keywords	Mathematics - Combinatorics ; Computer Science - Discrete Mathematics ; 68P10
Publishing date	2018-10-18
Publishing country	us
Document type	Book ; Online
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Article ; Online: Short and Medium Term Outcomes of Open and Laparoscopic Assisted Oesophageal Replacement Procedures.

Maher, Ahmed / De Coppi, Paolo / Blackburn, Simon / Loukogeorgakis, Stavros / Eaton, Simon / Cross, Kate / Giuliani, Stefano / Curry, Joe / Mullassery, Dhanya

Journal of pediatric surgery

2023 Volume 59, Issue 2, Page(s) 192–196

Abstract: Aim of the study: We describe the short- and medium-term outcomes following open and laparoscopic assisted oesophageal replacement surgery in a single tertiary paediatric surgical centre.: Methods: A retrospective review (institutional audit approval ...

Abstract	Aim of the study: We describe the short- and medium-term outcomes following open and laparoscopic assisted oesophageal replacement surgery in a single tertiary paediatric surgical centre. Methods: A retrospective review (institutional audit approval no. 3213) on patients who underwent open or laparoscopic-assisted oesophageal replacement (OAR vs. LAR) at our centre between 2002 and 2021 was completed. Data collected (demographics, early complications, stricture formation, need for oesophageal dilatations, and mortality) were analysed using GraphPad Prism v 9.50 and are presented as median (IQR). Results: 71 children (37 male) had oesophageal replacement surgery at a median age of 2.3 years (IQR 4.7 years). 51 were LAR (6 conversions). Replacement conduit was stomach (n = 67), colon (n = 3), or jejunum (n = 1). Most gastric transpositions had a pyloroplasty (46/67) or pyloromyotomy (14/67). Most common pathology was oesophageal atresia (n = 50 including 2 failed transpositions), caustic injury (n = 19 including 3 due to button battery), stricture of unknown cause (n = 1), and megaoesophagus (n = 1). There were 2 (2.8 %) early postoperative deaths at 2 days (major vessel thrombosis), 1 month (systemic sepsis), and one death at 5 years in the community. The rate of postoperative complications were comparable across LAR and OAR including anastomotic leak, pleural effusions, or early strictures. More patients with caustic pathology needed dilatations (60 % vs 30 % in OA, p = 0.05). Conclusions: Outcomes of open and laparoscopic-assisted oesophageal replacement procedures are comparable in the short and medium term. Anastomotic stricture is higher in those with caustic injury. Level of evidence: IV.
MeSH term(s)	Child ; Humans ; Male ; Child, Preschool ; Esophageal Stenosis/epidemiology ; Esophageal Stenosis/etiology ; Esophageal Stenosis/surgery ; Constriction, Pathologic/surgery ; Caustics ; Esophageal Atresia/surgery ; Esophageal Atresia/complications ; Postoperative Complications/epidemiology ; Postoperative Complications/etiology ; Postoperative Complications/surgery ; Laparoscopy/methods ; Retrospective Studies
Chemical Substances	Caustics
Language	English
Publishing date	2023-10-25
Publishing country	United States
Document type	Journal Article
ZDB-ID	80165-3
ISSN	1531-5037 ; 0022-3468
ISSN (online)	1531-5037
ISSN	0022-3468
DOI	10.1016/j.jpedsurg.2023.10.015
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Book ; Online: Mirror, Mirror

Blackburn, Simon

The Uses and Abuses of Self-Love

2014

Abstract: Everyone deplores narcissism, especially in others. The vain are by turns annoying or absurd, offending us whether they are blissfully oblivious or proudly aware of their behavior. But are narcissism and vanity really as bad as they seem? Can we avoid ... ...

Abstract	Everyone deplores narcissism, especially in others. The vain are by turns annoying or absurd, offending us whether they are blissfully oblivious or proudly aware of their behavior. But are narcissism and vanity really as bad as they seem? Can we avoid them even if we try? In Mirror, Mirror, Simon Blackburn, the author of such best-selling philosophy books as Think, Being Good, and Lust, says that narcissism, vanity, pride, and self-esteem are more complex than they first appear and have innumerable good and bad forms. Drawing on philosophy, psychology, literature, history, and popular culture
Language	English
Size	Online-Ressource (225 p)
Publisher	Princeton University Press
Publishing place	Princeton
Document type	Book ; Online
Note	Description based upon print version of record
ISBN	9780691161426 ; 0691161429
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Online: Constructions and bounds for codes with restricted overlaps

Blackburn, Simon R. / Esfahani, Navid Nasr / Kreher, Donald L. / Stinson, Douglas R.

2022

Abstract: Non-overlapping codes have been studied for almost 60 years. In such a code, no proper, non-empty prefix of any codeword is a suffix of any codeword. In this paper, we study codes in which overlaps of certain specified sizes are forbidden. We prove some ... ...

Abstract	Non-overlapping codes have been studied for almost 60 years. In such a code, no proper, non-empty prefix of any codeword is a suffix of any codeword. In this paper, we study codes in which overlaps of certain specified sizes are forbidden. We prove some general bounds and we give several constructions in the case of binary codes. Our techniques also allow us to provide an alternative, elementary proof of a lower bound on non-overlapping codes due to Levenshtein in 1964. Comment: 25 pages. Extra citations, typos corrected and explanations expanded
Keywords	Computer Science - Information Theory ; Computer Science - Discrete Mathematics ; Mathematics - Combinatorics ; 94A45
Publishing date	2022-11-18
Publishing country	us
Document type	Book ; Online
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