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Related Concept Videos

Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
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Other Factors Affecting Respiration Centers01:17

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Breathing is primarily an involuntary activity regulated by the brainstem respiratory centers. However, it can also be consciously controlled, allowing us to hold our breath or take deeper breaths when needed. This voluntary control is facilitated by the cerebral motor cortex, which bypasses the medullary centers to stimulate the respiratory muscles directly.
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Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
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Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
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Lattice Centering and Coordination Number02:33

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
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Center of Gravity00:58

Center of Gravity

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The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but...
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Related Experiment Video

Updated: Feb 10, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
03:43

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists

Published on: July 11, 2025

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Factors affecting successful colonoscopy procedures: Single-center experience.

Ramazan Kozan1, Tonguç Utku Yılmaz2, Uygar Baştuğral3

  • 1Department of General Surgery, Eren Hospital, İstanbul, Turkey.

Turkish Journal of Surgery
|May 15, 2018
PubMed
Summary

This study evaluated colonoscopy success rates, finding high cecum visualization and polyp detection. Factors like general anesthesia and experienced endoscopists improved colonoscopy outcomes and patient safety.

Keywords:
Colonoscopycecumdiagnosispolyp

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Area of Science:

  • Gastroenterology
  • Endoscopy
  • Colorectal Cancer Screening

Background:

  • Colonoscopy is crucial for diagnosing colon pathologies.
  • Successful colonoscopy involves visualizing the ileocecal valve and identifying polyps.
  • Evaluating colonoscopy success rates is essential for improving patient care.

Purpose of the Study:

  • To assess the success rate of colonoscopy procedures.
  • To identify factors influencing colonoscopy outcomes.
  • To report on polyp detection and colorectal cancer findings.

Main Methods:

  • Retrospective descriptive study conducted at İstanbul Eren hospital (2012-2015).
  • Data collected from hospital database, including patient demographics and colonoscopy results.
  • Procedures performed under general anesthesia with full bowel preparation.

Main Results:

  • 870 patients included; cecum reached in 97.8% (850 patients).
  • Factors hindering cecum access: older age, obesity, prior abdominal surgery, colonic tortuosity.
  • 203 polyp samplings in 139 patients; 29 (3.3%) colorectal cancers detected. No mortality or morbidity.

Conclusions:

  • General anesthesia and thorough bowel preparation may enhance colonoscopy success.
  • Increased endoscopist experience and patient-endoscopist cooperation improve cecum intubation and polyp detection rates.
  • These factors contribute to reduced complication rates in colonoscopy.