Final answer:
The oncoming nurse asking for guidance on providing care for a client with a portacath is upholding the 'Skilled communication' standard by seeking information needed to ensure patient safety and care.
Step-by-step explanation:
In the scenario described, the oncoming nurse is not breaching any standard for establishing and sustaining healthy work environments by expressing the need for guidance. Instead, the nurse is seeking to ensure skilled communication by admitting a gap in knowledge and asking for assistance to provide proper care for the client with a portacath access device. While it could be seen as part of effective decision making to recognize one's limitations and seek support, the specific standard that the nurse is upholding rather than breaching is 'Skilled communication.' This standard highlights the importance of clear, concise, and direct exchanges among healthcare professionals to ensure patient safety and the effective delivery of care.