Note the amount of free water in the two different feedings. Explain the physiology of RK's constipation and relate how the fiber and additional free water in the new feeding will help prevent constipation
The 2 kcals/cc tube feeding is more concentrated than the rest of his body and is being deposited into his stomach. The stomach will hold its contents and dilute it until it is the same concentration as the rest of the body. In this process water is added, some of which will not be reabsorbed. The net results are a loss of water from the body causing his dehydration. The large intestines try to compensate by absorbing more water and cause constipation. A lack of sufficient water intake, fiber, and exercise all contribute.
The new feeding is less concentrated and will not draw water into the stomach to dilute it, thus leaving more water in circulation; nor will it draw water into the intestines. If sufficient water is given with the feeding, the fiber will soften the fecal material and contribute to decreasing constipation.
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