Correct Answer: D

Rationale: Cromolyn sodium (nasal crom) is a mast cell stabilizer that is commonly used to prevent symptoms of allergic rhinitis, such as sneezing, itching, and congestion. It works best when used before exposure to allergens. The most effective administration schedule for nasal crom is to start using it just after allergy symptoms begin, with a dose of twice-a-day. This helps to prevent the release of histamine and other inflammatory substances from mast cells, thereby reducing allergic symptoms. Using nasal crom in this way can help provide relief and improve the overall management of allergic rhinitis.

Correct Answer: C

Rationale: A discectomy is a surgical procedure commonly performed to decompress the nerve root by removing a portion of the herniated disc that is pressing on the nerve. In cases of herniated discs causing radicular symptoms (such as pain radiating down the leg), a discectomy can help alleviate the compression on the nerve, reduce symptoms, and improve the patient's condition. This procedure involves removing the portion of the disc that is herniated or bulging out to relieve pressure on the nerve root, allowing for improved function and reduced pain. Spinal fusion, laminectomy, and foraminotomy are other surgical procedures that are not typically performed for the direct decompression of the nerve root in cases of herniated discs at a specific level like the L5-S1 level.

Correct Answer: A

Rationale: For a preschooler, it is recommended that they get more than 8 hours of sleep each day. Adequate sleep is crucial for their physical development, overall health, and cognitive function. Preschoolers typically need around 10-13 hours of sleep per day to support their growth and development. Getting less than the recommended amount of sleep can lead to issues such as behavioral problems, difficulty concentrating, and poor physical development. Therefore, ensuring that a preschooler gets enough sleep is vital for their physical well-being.

Correct Answer: B

Rationale: In the community setting, the essential record about the patient is the patient's chart. This chart contains all important information about the patient, including medical history, treatment plans, medications, progress notes, and any other pertinent information related to the patient's care. It serves as a crucial document for healthcare providers to track and monitor the patient's health status, facilitate communication among team members, ensure continuity of care, and make informed clinical decisions. The patient's chart is a comprehensive and centralized source of information that guides the delivery of quality care in the community setting.

Correct Answer: D

Rationale: Sonography, also known as ultrasound, is a non-invasive imaging technique that uses high-frequency sound waves to create images of structures inside the body. In the context of a patient who is pregnant, sonography is commonly used to assess the well-being of the fetus. It allows healthcare providers to monitor the growth and development of the fetus, evaluate the placenta, amniotic fluid levels, and detect any abnormalities that may be present.