A summary of fluid management:  
- 0.9% NaCl (Titrated to effect) 
- May initially require 1L STAT, followed by 1hr/2hr/4hr Bags (faster if clinically dehydrated) 
- Only start insulin infusion immediately if there is HHS with evidence of ketones (urine ketones >2, serum 1-3) and not acidotic (pH >7.3)  
- OR in a mixed DKA HHS picture i.e. significant ketones  (>3)and acidotic  (<7.3) 
 
- If the osmolality is increasing and fluid balance adequate, then consider switching to 0.45% sodium chloride at same infusion rate. 
Further guidance on fluid management, and specific management for certain patient groups can be found in the JBDS: The management of the hyperosmolar hyperglycaemic state (HHS) in adults with diabetes guideline.