<prompt> All of the following statements regarding a child with hypernatremic dehydration are true ExceptThere is at least a 10 percent fluid deficitRapid rehydration is indicatedMuscle tone is increasedThe sensorium fluctuates between lethargy and hyperirritability  <response>: Signs of hypernatremic dehydration include dry rubbery skin, increased muscle tone, and altered level of consciousness. A hypernatremic child should be rehydrated slowly to avoid a rapid reexpansion of intracellular volume that could lead to cerebral edema. A good guide is to replace the fluid deficit over 48 to 72 h. Serum sodium should not be lowered more than 10 to 15 mEqL over 24 h. Reference: GHAI Essential pediatrics, 8th edition, Nutrition Chapter 