Im an adult A&E nurse and page 2 of the admission booklet for any illness is think sepsis. As soon as that first set of obs is done sepsis would flag and treatment inline with sepsis pathways would begin. It is drilled into every member of staff. Although i do my own obs i dont ask my HCA to do them unless I am really busy and then i will only ask them to do ones on patients i know would be low scoring due to the nature of their admission such as injurys rather than illness.
However. I have been into the childrens A&E at my own hospital, and the treatment was radically different. My child waiting over 7 hours for pain relief, it took more than 2 hours to be triaged. I wouldnt be surprised if the response to sepsis triggers were different there. I found the differences between adult and child ED mindblowing and i did speak to my seniors, who work across both departments about how shocking i found it.
I also have worked on wards in the past in a different trust, wards where staffing was awful. I have witnessed first hand HCA's making up obs results, and lying about completing personal care (part of the reason i now do all my own obs as much as i can) and it wouldnt surprise me sepsis red flags being missed in those areas either.
I feel personally, only nurses that are trained should complete observations and documentation. 90% of HCA's are worth their weight in gold and do an absolutely amazing under appreciated job in the hosp. Some, just dont have a clue, have no training, and no motivation to learn for themselves, and i feel this is why things are missed as more and more that nursing task is being placed on untrained unqualified members of staff. In my nurse training we had a whole semester long module which was based around sepsis, the triggers, the response, the immediate nursing interventions, the importance of escalating, how to escalate and ensure your point is made quickly and clearly so the medics will get a clear overview, and how to give your expectation of what should happen to a medic who is your senior.
I also think sometimes as a nurse you have to be very proactive and assertive to get medics to listen to you