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Related Concept Videos

Gastric Motility01:16

Gastric Motility

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Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...
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Gastric Emptying01:16

Gastric Emptying

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Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...
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Gastric Phase of Digestion01:26

Gastric Phase of Digestion

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The gastric phase of digestion begins as soon as food enters the stomach. The incoming food bolus triggers neural and hormonal mechanisms, which last approximately 3 to 4 hours. During this phase, the stomach undergoes significant changes to prepare the food for further digestion and absorption.
When food enters the stomach, it stretches the stomach walls and activates stretch receptors. This triggers local reflexes of the enteric nervous system, mediated through the myenteric plexus. These...
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Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

Matrix-Assisted Laser Desorption Ionization (MALDI)

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Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
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Neural Regulation01:37

Neural Regulation

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Hormonal Regulation01:40

Hormonal Regulation

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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Related Experiment Video

Updated: Feb 3, 2026

Robotics in Surgery: A Modular Robotic Platform Driven Gastric Wedge Resection
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Robotics in Surgery: A Modular Robotic Platform Driven Gastric Wedge Resection

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Less Morbidity with Robot-Assisted Gastric Bypass Surgery than with Laparoscopic Surgery?

J Cahais1, R M Lupinacci2, O Oberlin2

  • 1Service de Chirurgie Digestive, Groupe Hospitalier Diaconesses Croix Saint-Simon, 125, rue d'Avron, 75020, Paris, France. jcahais@hopital-dcss.org.

Obesity Surgery
|October 18, 2018
PubMed
Summary

Robot-assisted gastric bypass (RA-GB) showed fewer complications and shorter hospital stays than laparoscopic gastric bypass (L-GB). While RA-GB demonstrated a learning curve, its clinical benefit is promising despite higher costs.

Keywords:
Gastric bypassManual anastomosisMinimal access surgeryRobot-assisted surgery

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One-anastomosis Gastric Bypass OAGB in Rats
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Area of Science:

  • Bariatric Surgery
  • Minimally Invasive Surgical Techniques
  • Robotic Surgery

Background:

  • The clinical benefit of robot-assisted gastric bypass (RA-GB) compared to laparoscopic gastric bypass (L-GB) remains unclear.
  • Existing studies offer limited comparative data on perioperative outcomes.

Purpose of the Study:

  • To compare the perioperative outcomes of robot-assisted gastric bypass (RA-GB) with traditional laparoscopic gastric bypass (L-GB).
  • To evaluate secondary endpoints including hospitalization duration, readmission rates, and weight loss at one year.

Main Methods:

  • A comparative study of 82 RA-GB patients (2013-2016) and 169 L-GB patients (2009-2016).
  • Analysis of perioperative outcomes, including operation time, complication rates, hospital stay duration, readmission rates, and one-year weight loss.
  • Assessment of the learning curve for RA-GB through operation times and complication rates.

Main Results:

  • RA-GB demonstrated significantly fewer overall complications (9.8% vs. 21.9%, p=0.019) and shorter median hospital stays (3 vs. 4 days, p<0.0001).
  • No significant differences were observed in operation duration, 90-day readmission rates, or one-year excess weight loss between the groups.
  • A significant decrease in mean operation time for RA-GB was noted from 2014 to 2016, indicating a learning curve.

Conclusions:

  • Robot-assisted gastric bypass (RA-GB) is associated with reduced postoperative complications and shorter hospital stays compared to laparoscopic gastric bypass (L-GB).
  • The learning curve for RA-GB is evident, with decreasing operation times over the study period.
  • The increased cost associated with RA-GB remains a significant barrier to its widespread adoption.