Lactated ringer\ s solution-rationale: lactated ringers solution, with an osmolalityof approximately 273 mosm/l, isisotonic. the nurse shouldnt give half-normal saline solution because itshypotonic, with an osmolality of 154 mosm/l. giving 5% dextrose and normal saline solution (with an osmolality of 559 mosm/l) or 10% dextrose in water (with an osmolality of 505 mosm/l) also would be incorrect because these solutions arehypertonic. client needs category: physiological integrity client needs subcategory: pharmacological and parenteral therapies cognitive level: comprehension reference: smeltzer, s.c., et al. brunner and suddarths textbook of medical surgical-nursing,11th ed. philadelphia: lippincott williams & wilkins, 2008, p. 311.