A client is admitted with hypotension, tachycardia, low urine output, and dry mucous membranes after severe vomiting and diarrhea. Laboratory results indicate dehydration. Which hormone-driven response(s) should the nurse expect? Select all that apply.

Brief introduction:

Parkinson's disease is a progressive neurodegenerative disorder caused by the depletion of dopamine-producing neurons in the substantia nigra. Pathophysiology involves the accumulation of Lewy bodies, leading to motor dysfunction characterized by bradykinesia, postural instability, and the eventual development of profound mobility impairments as the disease reaches advanced Hoehn and Yahr stages.

Rationale:

A. Inquiring about hand tremors addresses a classic early symptom of the disease, often described as a pill-rolling tremor. While significant for initial diagnosis, tremors are not the most reliable indicator of advanced progression, as they may stabilize or even decrease in intensity as motor rigidity increases over time.

B. Stiffness in the neck or shoulder refers to cogwheel rigidity, which is one of the cardinal signs of the disorder. Although this causes significant discomfort and limited range of motion, it is a baseline manifestation that appears early and does not capture the severe functional decline seen in late-stage complications.

C. Asking about being frozen to a spot identifies freezing of gait, a phenomenon highly characteristic of advanced Parkinson's. This symptom indicates a breakdown in the motor circuitry and significantly increases the risk for falls, marking a critical transition in the clinical course and severity of the patient's condition.

D. Jerky movements, or levodopa-induced dyskinesia, are side effects of long-term pharmacological therapy rather than the primary disease process itself. While these movements indicate prolonged medication use, they do not provide the best direct assessment of the neuronal degeneration or the progression of the disease's inherent motor symptoms.

Tetralogy of Fallot is a congenital cardiac defect characterized by pulmonary stenosis, ventricular septal defect, overriding aorta, and right ventricular hypertrophy. This combination results in a right-to-left shunt, leading to significant hypoxemia during exertion or crying, known as a tet spell. Squatting is a compensatory mechanism used by the child to increase systemic vascular resistance and improve pulmonary blood flow.

Rationale:

A. Forcing the child to stand would decrease systemic vascular resistance and exacerbate the hypoxic episode. Squatting is a natural instinct that helps force more blood into the pulmonary artery by kinking the femoral arteries. The nurse should never interfere with this protective and autonomic maneuver.

B. Intubation is an invasive, last-resort measure and is not indicated for a child who is actively compensating through squatting behavior. Most hypercyanotic spells are managed with knee-chest positioning, supplemental oxygen, and calming techniques. Immediate surgical or mechanical airway intervention is premature without assessing the severity of the spell.

C. The nurse must first determine the severity of the hypoxic event by checking the pulse oximetry. Assessing the oxygen saturation provides a baseline measurement to evaluate the effectiveness of the child’s squatting and determine if further oxygen therapy is needed. It is the priority assessment for cyanotic heart disease.

D. The Trendelenburg position is used for shock but is inappropriate and potentially harmful for a child in a tet spell. Instead, the nurse should facilitate the knee-chest position if the child stops squatting voluntarily. Proper positioning aims to reduce the right-to-left shunt and improve arterial oxygenation.