As set forth in Section 2878 of the Code, gross negligence is deemed unprofessional conduct and is a ground for disciplinary action. As used in Section 2878 “gross negligence” means a substantial departure from the standard of care which, under similar circumstances, would have ordinarily been exercised by a competent licensed vocational nurse, and which has or could have resulted in harm to the consumer. An exercise of so slight a degree of care as to justify the belief that there was a conscious disregard or indifference for the health, safety, or welfare of the consumer shall be considered a substantial departure from the above standard of care.