Color coding for Nitrous oxide cylinder is:

Correct Answer: C

Rationale: Nitrous oxide cylinders are coded French blue per international standards (e.g., BOC), ensuring safe identification in medical settings. Black is oxygen, black with white shoulders is air, and gray is carbon dioxide. Nurses verify colors, preventing gas mix-ups during anesthesia, critical for patient safety and procedural accuracy.

Correct Answer: D

Rationale: Subjective data are the client's perceptions about their health like reporting pain or fatigue captured through interviews or questionnaires. These reflect personal experiences, not measurable by others, distinguishing them from objective data (e.g., temperature). Physician history forms provide mixed data, often objective (e.g., lab results), not purely subjective unless quoting the client. Observations by the collector like rash appearance are objective, directly seen or measured. Ancillary reports (e.g., radiology) are objective, based on tests, not perceptions. Subjective data's focus on the client's voice e.g., 'I feel anxious' is vital for holistic assessment, guiding nurses to explore symptoms' impact, making it the correct definition here.

Correct Answer: B

Rationale: Surgical asepsis, or sterile technique, is required for procedures breaching sterile areas like urinary catheterization where the bladder must remain free of microbes to prevent infection. Inserting a catheter through the urethra demands sterile gloves, drapes, and equipment, as contamination risks urinary tract infections. Vaginal instillation of estrogen uses clean technique, not sterile, as the vagina has normal flora. Nasogastric tube insertion requires clean technique; the stomach isn't sterile, tolerating minor contamination. Colostomy irrigation also uses clean technique, managing an already exposed site. Urinary catheterization's invasive nature and sterile field necessity make it the procedure always requiring surgical asepsis, aligning with infection prevention standards in nursing.

Correct Answer: C

Rationale: Side rails up at all times is the most direct safety measure for a newly hospitalized client.

Correct Answer: C

Rationale: Insulin is administered subcutaneously for consistent absorption.