http://www.gssiweb.com/reflib/refs/19/d000000020000005b.cfm?pid=96&CFID=598862&CFTOKEN=95280107
A large glass of water: The stomach becomes distended, but there are no solids to grind and liquefy, and after the water reaches the small intestine, no further processing is required before absorption - the rate of gastric emptying should be very fast.
For liquids, the principal determinant of rate of gastric emptying is volume and, secondarily, composition. If the liquid is low in nutrients (e.g. Evian bottled water), there is an exponential relationship between volume and rate of emptying - large volumes empty at an exponentially faster rate than small volumes.
However,
if the fluid is hypertonic or acidic or rich in nutrients such as fat or certain amino acids, the rate of gastric emptying will be considerably slower and non-exponential. Indeed, the rate of gastric emptying of any meal can be predicted rather accurately by knowing its nutrient density. Nutrient density is sensed predominantly in the small intestine by osmoreceptors and chemoreceptors, and relayed to the stomach as inhibitory neural and hormonal messages that delay emptying by altering the patterns of gastric motility. The presence of fat in the small intestine is the most potent inhibitor of gastric emptying, resulting in relaxation of the proximal stomach and diminished contractions of the distal, "gastric grinder" - when the fat has been absorbed, the inhibitory stimulus is removed and productive gastric motility resumes.
Signs and symptoms of gastroparesis are
- heartburn
- nausea
- vomiting of undigested food
- an early feeling of fullness when eating
- weight loss
- abdominal bloating
- erratic blood glucose levels
- lack of appetite
- gastroesophageal reflux
- spasms of the stomach wall
These symptoms may be mild or severe, depending on the person.
plus it was mean't to be 1000ml of water, typo's happen plus the salt aids the absorbtion of the fluid since it ain't dumped immediately into the smaller intestines allowing it to be absorbed.
slowing down the emptying process gives the body more time to absorb the fluids taken on board.