An older adult patient reports to the advanced practice registered nurse (APRN) that they are having difficulty driving. The patient reports being afraid to change lanes because sometimes they do not see a car in the next lane. On physical examination, the APRN notes a defect in peripheral vision and increased cup-to-disc ratio. Which diagnosis is most likely?

Peripheral pulse characteristics provide important clues about underlying cardiovascular function, particularly stroke volume and vascular resistance. A bounding pulse reflects an increased stroke volume with rapid ejection of blood into the arterial system followed by a rapid fall in pressure. This pattern is commonly seen in conditions that increase systolic output or reduce diastolic pressure. Recognizing pulse quality helps the clinician identify specific valvular or systemic cardiovascular disorders.

Rationale:
A. Mitral stenosis is a condition characterized by obstruction of blood flow from the left atrium to the left ventricle, resulting in reduced left ventricular filling and decreased cardiac output. This leads to a weak, thready pulse rather than a bounding one. The diminished stroke volume does not produce the forceful arterial expansion seen in bounding pulses.

B. Hypothyroidism is associated with a slowed metabolic state and decreased cardiac output due to reduced heart rate and contractility. Patients typically present with a slow, weak, and sometimes delayed pulse rather than a bounding pulse. The decreased sympathetic stimulation results in reduced pulse amplitude.

C. Aortic regurgitation is the condition most associated with a bounding radial pulse due to backflow of blood from the aorta into the left ventricle during diastole. This leads to increased stroke volume and widened pulse pressure, producing a forceful, “water hammer” or bounding pulse. The rapid rise and fall in arterial pressure is a hallmark finding in this valvular disorder.

D. Arterial embolism causes sudden obstruction of blood flow to a distal extremity, resulting in absent or markedly diminished pulses in the affected area. It is associated with pain, pallor, and coolness rather than increased pulse amplitude. The interruption of arterial flow makes a bounding pulse impossible in the affected limb.

Assessment of hip stability in newborns is an essential component of early musculoskeletal screening to detect developmental dysplasia of the hip (DDH). Early identification is critical because untreated hip instability can lead to gait abnormalities, joint deformity, and long-term disability. Specific orthopedic maneuvers are used during infancy to assess whether the femoral head is dislocatable or reducible within the acetabulum. These tests are routinely performed until the infant begins walking, after which other signs become more apparent.

Rationale:
A. The Barlow test is used to assess whether the infant’s hip is dislocatable. It involves gently adducting the hip and applying posterior pressure to determine if the femoral head can be pushed out of the acetabulum. A positive Barlow test indicates hip instability and suggests developmental dysplasia of the hip requiring further evaluation and monitoring.

B. The Trendelenburg test assesses hip abductor muscle strength in older children and adults, not newborns. It evaluates pelvic stability during single-leg stance and is used in conditions such as hip dysplasia, muscular weakness, or nerve injury. It is not appropriate for detecting neonatal hip instability.

C. The Ortolani test is used to assess whether a dislocated hip can be reduced back into the acetabulum. It involves abducting the infant’s hips while applying gentle anterior pressure to feel or hear a “clunk” as the femoral head relocates. A positive Ortolani sign indicates a reducible dislocation consistent with developmental dysplasia of the hip.

D. The Leopold maneuver is an obstetric assessment technique used during pregnancy to determine fetal position, presentation, and lie within the uterus. It is not related to neonatal orthopedic examination or detection of hip instability. Therefore, it is not used in assessing developmental dysplasia of the hip.