A nurse is caring for a client who has hyperemesis gravidarum.Which of the following laboratory tests should the nurse anticipate?

Choice A rationaleRapid plasma regain is not a standard laboratory test associated with hyperemesis gravidarum. Hyperemesis gravidarum is characterized by severe nausea and vomiting leading to dehydration and electrolyte imbalances.Choice B rationaleA urine culture is used to detect urinary tract infections, which are not a primary concern in hyperemesis gravidarum unless specifically indicated by symptoms of a UTI.Choice C rationaleProthrombin time (PT) and other coagulation studies assess blood clotting. While severe dehydration and malnutrition from hyperemesis gravidarum could theoretically affect coagulation, it is not a routine initial test to anticipate.Choice D rationaleUrine ketones are a key laboratory finding in hyperemesis gravidarum. Due to persistent vomiting and inadequate oral intake, the body starts to break down fat for energy, leading to ketonuria. The presence of ketones in the urine indicates starvation and the need for intravenous fluids and nutritional support.