Related Experiment Video
Updated: Feb 9, 2026

Fabrication of Small Caliber Stent-grafts Using Electrospinning and Balloon Expandable Bare Metal Stents
Published on: October 26, 2016
Optimal Interval From Placement of a Self-expandable Metallic Stent to Surgery in Patients With Malignant Large Bowel
Akihisa Matsuda1, Masao Miyashita1, Satoshi Matsumoto1
1Department of Surgery, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Chiba.
Objectives:
The aim of this study was to investigate the risk factors for postoperative complications (POCs) and optimal interval between a self-expandable metallic stent (SEMS) placement and elective surgery, "bridge to surgery (BTS)" in patients with malignant large bowel obstruction.
Materials And Methods:
BTS strategy was attempted in 49 patients with malignant large bowel obstruction from January 2013 to March 2017 in our institution. Two of these patients were excluded because they had undergone emergency surgery for SEMS migration.
Results:
Of these 47 patients, 8 had developed POC (Clavien-Dindo grading ≥II), whereas 39 patients had no such complications. Multivariate analysis identified only the interval between SEMS and surgery as an independent risk factor for POC. Furthermore, a cutoff value of 15 days for interval between SEMS and surgery was identified by receiver operating characteristic curve analysis.
Conclusions:
An interval of over 15 days is recommended for minimizing POC in patients undergoing elective surgery in a BTS setting.
Related Concept Videos
Prediction Intervals
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y.
Bonding in Metals
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
Alkali Metals
Table 1: Properties of the alkali metals
Confidence Intervals
A...
Improper Integrals: Infinite Intervals

