Results 31 to 40 of about 699,186 (223)

Development and Implementation of a Comprehensive Quality Assurance Program at a Community Endoscopy Facility

open access: yesCanadian Journal of Gastroenterology, 2011
Quality assurance (QA) is a process that includes the systematic evaluation of a service, institution of improvements and ongoing evaluation to ensure that effective changes were made.
Robert J Hilsden   +5 more
doaj   +1 more source

Analysis of factors influencing early readmission after resection of primary rectal cancer [PDF]

open access: yesKorean Journal of Clinical Oncology, 2013
Purpose: Early readmission of patients who underwent resection for primary rectal cancer will raise social costs and resources for treatment and will affect the patients’ prognosis.
Bong Kyun Kim   +6 more
doaj   +1 more source

Estimating the coverage in 3d reconstructions of the colon from colonoscopy videos [PDF]

open access: yesarXiv, 2022
Colonoscopy is the most common procedure for early detection and removal of polyps, a critical component of colorectal cancer prevention. Insufficient visual coverage of the colon surface during the procedure often results in missed polyps. To mitigate this issue, reconstructing the 3D surfaces of the colon in order to visualize the missing regions has
arxiv  

Number of negative lymph nodes with a positive impact on survival of stage III colon cancer; a retrospective observation study for right side and left side colon

open access: yesBMC Cancer, 2022
Background The purpose was to examine the effect of negative lymph nodes (NLN) number on survival in stage III colon cancer. To reduce the interference of acute inflammation, we included patients with stage III colon cancer who had undergone elective ...
Yi-Hung Kuo   +5 more
doaj   +1 more source

Invariant means, complementary averages of means, and a characterization of the beta-type means [PDF]

open access: yesMathematics 8 (10), Art. No. 1753(2020), 2020
We prove that whenever the selfmapping $(M_1,\dots,M_p)\colon I^p \to I^p$, ($p \in \mathbb{N}$ and $M_i$-s are $p$-variable means on the interval $I$) is invariant with respect to some continuous and strictly monotone mean $K \colon I^p \to I$ then for every nonempty subset $S \subseteq\{1,\dots,p\}$ there exists a uniquely determined mean $K_S \colon
arxiv   +1 more source

Colonic phytobezoar [PDF]

open access: yesCase Reports, 2007
A healthy 51-year-old man presented to the emergency department owing to a lack of bowel movement and dull abdominal pain for 1 week. He had no history of any systemic illness. Physical examination disclosed hypoactive bowel sound and a 4-cm palpable mass over the left lower quadrant. A rectal examination was normal.
S-H Tsai, S-J Chu, S-J Lee
openaire   +5 more sources

Protective loop ileostomy or colostomy? A risk evaluation of all common complications [PDF]

open access: yesAnnals of Coloproctology
Purpose Protective ileostomy and colostomy are performed in patients undergoing low anterior resection with a high leakage risk. We aimed to compare surgical, medical, and daily care complications between these 2 ostomies in order to make individual ...
Yi-Wen Yang   +8 more
doaj   +1 more source

Pneumococcus and the stress-gradient hypothesis: a trade-off links $R_0$ and susceptibility to co-colonization across countries [PDF]

open access: yesarXiv, 2022
Modern molecular technologies have revolutionized our understanding of bacterial epidemiology, but reported data across different settings remain under-integrated in common theoretical frameworks. Pneumococcus serotype co-colonization, caused by the polymorphic bacteria Streptococcus pneumoniae, has been increasingly investigated in recent years. While
arxiv  

Algebraic independence and linear difference equations [PDF]

open access: yesJournal of the European Mathematical Society (JEMS). Vol. 26, (2024), no. 5, p. 1899-1932, 2020
We consider pairs of automorphisms $(\phi,\sigma)$ acting on fields of Laurent or Puiseux series: pairs of shift operators $(\phi\colon x\mapsto x+h_1, \sigma\colon x\mapsto x+h_2)$, of $q$-difference operators $(\phi\colon x\mapsto q_1x,\ \sigma\colon x\mapsto q_2x)$, and of Mahler operators $(\phi\colon x\mapsto x^{p_1},\ \sigma\colon x\mapsto x^{p_2}
arxiv   +1 more source

Survival analysis of local excision vs total mesorectal excision for middle and low rectal cancer in pT1/pT2 stage and intermediate pathological risk

open access: yesWorld Journal of Surgical Oncology, 2019
Background Local excision (LE) is a feasible treatment approach for rectal cancers in stage pT1 and presents low pathological risk, whereas total mesorectal excision (TME) is a reasonable treatment for more advanced cancers. On the basis of the pathology
I-Li Lai   +12 more
doaj   +1 more source

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