10 research outputs found
Xi and AntiXi production in Pb+Pb collisions at 40 AGeV at CERN SPS
First results on the production of Xi and AntiXi hyperons in Pb+Pb
interactions at 40 AGeV are presented. The AntiXi/Xi ratio at midrapidity is
studied as a function of collision centrality. The ratio shows no significant
centrality dependence within statistical errors; it ranges from 0.07 to 0.15.
The AntiXi/Xi ratio for central Pb+Pb collisions increases strongly with the
collision energy.Comment: 6 pages, 6 figures, proceedings of SQM03, to be published in Journal
of Physics G; V2: changes in table 1 and figure
Determination of the Michel Parameters and the tau Neutrino Helicity in tau Decay
Using the CLEO II detector at the storage ring CESR, we have
determined the Michel parameters , , and in decay as well as the tau neutrino helicity parameter
in decay. From a data sample of
tau pairs produced at , using events of
the topology and , and the determined sign of , the combined
result of the three samples is: , , , and
. The results are in agreement with
the Standard Model V-A interaction.Comment: 18 page postscript file, postscript file also available through
http://w4.lns.cornell.edu/public/CLN
Dataset for Data in Brief (DIB-D-21-00658)
This dataset is for the Data in Brief article: "Dataset for the synthesis and application of single-component heterogeneous catalysts based on zinc and tin for the cycloaddition of pure, diluted, and impure CO2 to epoxides under mild conditions
Evaluating the Role of Electricity Storage by Considering Short-Term Operation in Long-Term Planning
Predictors for anastomotic leak, postoperative complications, and mortality after right colectomy for cancer: Results from an international snapshot audit
Background: A right hemicolectomy is among the most commonly performed operations for colon cancer, but modern high-quality, multination data addressing the morbidity and mortality rates are lacking. Objective: This study reports the morbidity and mortality rates for right-sided colon cancer and identifies predictors for unfavorable short-term outcome after right hemicolectomy. Design: This was a snapshot observational prospective study. Setting: The study was conducted as a multicenter international study. Patients: The 2015 European Society of Coloproctology snapshot study was a prospective multicenter international series that included all patients undergoing elective or emergency right hemicolectomy or ileocecal resection over a 2-month period in early 2015. This is a subanalysis of the colon cancer cohort of patients. Main Outcome Measures: Predictors for anastomotic leak and 30-day postoperative morbidity and mortality were assessed using multivariable mixed-effect logistic regression models after variables selection with the Lasso method. Results: Of the 2515 included patients, an anastomosis was performed in 97.2% (n = 2444), handsewn in 38.5% (n = 940) and stapled in 61.5% (n = 1504) cases. The overall anastomotic leak rate was 7.4% (180/2444), 30-day morbidity was 38.0% (n = 956), and mortality was 2.6% (n = 66). Patients with anastomotic leak had a significantly increased mortality rate (10.6% vs 1.6% no-leak patients; p 65 0.001). At multivariable analysis the following variables were associated with anastomotic leak: longer duration of surgery (OR = 1.007 per min; p = 0.0037), open approach (OR = 1.9; p = 0.0037), and stapled anastomosis (OR = 1.5; p = 0.041). Limitations: This is an observational study, and therefore selection bias could be present. For this reason, a multivariable logistic regression model was performed, trying to correct possible confounding factors. Conclusions: Anastomotic leak after oncologic right hemicolectomy is a frequent complication, and it is associated with increased mortality. The key contributing surgical factors for anastomotic leak were anastomotic technique, surgical approach, and duration of surgery
Relationship between method of anastomosis and anastomotic failure after right hemicolectomy and ileo-caecal resection: an international snapshot audit
Aim The anastomosis technique used following right-sided colonic
resection is widely variable and may affect patient outcome. This study
aimed to assess the association between leak and anastomosis technique
(stapled vs handsewn).
Method This was a prospective, multicentre, international audit
including patients undergoing elective or emergency right hemicolectomy
or ileo-caecal resection operations over a 2-month period in early 2015.
The primary outcome measure was the presence of anastomotic leak within
30 days of surgery, determined using a prespecified definition. Mixed
effects logistic regression models were used to assess the association
between leak and anastomosis method, adjusting for patient, disease and
operative cofactors, with centre included as a random-effect variable.
Results This study included 3208 patients, of whom 78.4\% (n = 2515)
underwent surgery for malignancy and 11.7\% (n = 375) underwent surgery
for Crohn's disease. An anastomosis was performed in 94.8\% (n = 3041)
of patients, which was handsewn in 38.9\% (n = 1183) and stapled in
61.1\% (n = 1858). Patients undergoing hand-sewn anastomosis were more
likely to be emergency admissions (20.5\% handsewn vs 12.9\% stapled)
and to undergo open surgery (54.7\% handsewn vs 36.6\% stapled). The
overall anastomotic leak rate was 8.1\% (245/3041), which was similar
following handsewn (7.4\%) and stapled (8.5\%) techniques (P = 0.3).
After adjustment for cofactors, the odds of a leak were higher for
stapled anastomosis (adjusted OR = 1.43; 95\% CI: 1.04-1.95; P = 0.03).
Conclusion Despite being used in lower-risk patients, stapled
anastomosis was associated with an increased anastomotic leak rate in
this observational study. Further research is needed to define patient
groups in whom a stapled anastomosis is safe