Gastric Volume.pdf

Gastric volume analysis involves studying changes in gastric content volume over time. A study with 12 subjects in a cross-over design used MRI to measure gastric emptying after consuming isocaloric meals with either albumin or lipid. The results show varying gastric content volumes over 80 minutes, with different patterns for albumin and lipid meals.

Gastric "emptying" is defined as the change in gastric content over time, which includes both meal and secretion. Traditional methods measure radioactivity clearance, which only sees the meal and is blind to secretion, resulting in curves that go down, indicating "emptying". In contrast, measuring content clearance shows the total content, including both meal and secretion, and the curve can go up, indicating a "change" in gastric volume.

Key findings include:
- Gastric content volume changes over time after meal consumption
- Different patterns for albumin and lipid meals
- Importance of considering both meal and secretion in gastric emptying analysis
- Limitations of traditional methods in measuring gastric emptying.