DKA & HHS Treatment Guideline

About This DKA & HHS Treatment Guideline Tool

This interactive tool is designed to assist healthcare professionals in navigating the complex, time-sensitive management of Diabetic Ketoacidosis (DKA) and Hyperosmolar Hyperglycemic State (HHS). These are life-threatening endocrine emergencies requiring prompt, protocol-driven care. This guide simplifies the DKA & HHS Treatment Guideline by breaking it down into critical steps.

Diagnostic Criteria: DKA vs. HHS

Parameter	DKA	HHS
Plasma Glucose	≥200 mg/dL, or known diabetes*	>600 mg/dL
Arterial pH	<7.30	>7.30
Serum Bicarbonate	<18 mEq/L	>18 mEq/L
Urine/Serum Ketones	β-hydroxybutyrate ≥3.0 mmol/L (preferred)	Small or negative (<3.0 mmol/L)
Anion Gap	>10-12 (supportive only)	Variable
Serum Osmolality	Variable	>300 mOsm/kg (effective)

^* Euglycemic DKA (glucose <200 mg/dL) can occur, especially with SGLT2 inhibitors, pregnancy, or poor oral intake. The 2024 consensus prefers blood β-hydroxybutyrate over urine ketones, and a mild/moderate/severe severity grade based on pH/bicarbonate and ketonemia.

Detailed Management Principles

1. Fluid Resuscitation

This is the most critical first step. The goal is to correct intravascular volume depletion, improve renal perfusion, and lower serum glucose. Recent guidelines suggest balanced crystalloids are a reasonable alternative to normal saline.

• Initial (First Hour): Infuse 1 to 1.5 Liters of 0.9% NaCl or Balanced Crystalloid Solution (e.g., Lactated Ringer’s).
• Subsequent: After the first hour, calculate the corrected serum sodium.
  • If corrected Na+ is high/normal: Switch to 0.45% NaCl at 250-500 mL/hr.
  • If corrected Na+ is low: Continue 0.9% NaCl (or balanced crystalloid) at 250-500 mL/hr.
• Adding Dextrose: When serum glucose reaches <250 mg/dL (DKA) or ~300 mg/dL (HHS), add 5–10% dextrose and reduce the insulin infusion to 0.05 units/kg/h to prevent hypoglycemia while clearing ketones.

2. Insulin Therapy

Insulin is essential to stop ketogenesis and correct hyperglycemia. NEVER start insulin until serum K+ is ≥3.5 mmol/L.

• Standard Dose: Start a continuous IV infusion of Regular Insulin at 0.1 units/kg/hr.
• Titration: Aim for a glucose drop of 50-75 mg/dL per hour. If not achieved, the infusion rate may need to be adjusted.
• Note: A fixed-rate IV infusion is standard; an initial 0.1 units/kg bolus is optional and mainly considered if IV access is delayed.
• Mild/moderate DKA: Per the 2024 consensus, subcutaneous rapid-acting insulin (e.g., lispro, aspart) every 1–2 hours is an acceptable alternative to an IV infusion in selected, non-severe cases that can be managed outside the ICU, using an institutional protocol.

3. Potassium (K+) Management

Patients with DKA/HHS are total-body potassium depleted, even if their serum K+ is normal or high. Insulin therapy will drive K+ into cells, causing a rapid drop.

• If initial K+ is <3.5 mmol/L: HOLD insulin. Replace K+ at ~10 mmol/hr until K+ is ≥3.5 mmol/L.
• If initial K+ is 3.5-5.0 mmol/L: START insulin. Add 20-30 mmol of K+ (as KCl and/or KPhos) to each liter of IV fluid, targeting K+ 4-5 mmol/L.
• If initial K+ is >5.0 mmol/L: START insulin. Do not add K+ initially; recheck within 2 hours and begin replacement once K+ <5.0 mmol/L.

Limitations

This tool provides a general framework based on the DKA & HHS Treatment Guideline. It is not a substitute for clinical judgment. Patient-specific factors (e.g., renal failure, congestive heart failure, extremes of age) require careful modification of these protocols.

Frequently Asked Questions (FAQ)

1. Why use balanced crystalloids (like LR) instead of normal saline (0.9% NaCl)?

Normal Saline contains a high chloride load, which can cause or worsen a non-anion gap metabolic acidosis (hyperchloremic acidosis). This can confuse the clinical picture by keeping the bicarbonate low even as the ketoacidosis (anion gap) resolves. Balanced solutions (a key part of the modern DKA & HHS Treatment Guideline) have a more physiologic chloride concentration and may lead to a faster resolution of acidosis.

2. When and why do I add dextrose (D5W) to the IV fluids?

Add dextrose when serum glucose reaches <250 mg/dL (DKA) or ~300 mg/dL (HHS), and reduce the insulin infusion to 0.05 units/kg/h. The goal of insulin therapy is to stop ketone production (i.e., “close the anion gap”), not just to normalize glucose. Adding dextrose allows you to continue the insulin infusion to resolve the acidosis without making the patient hypoglycemic.

3. When should bicarbonate be given?

Bicarbonate therapy is rarely indicated. Most guidelines recommend considering it only if the arterial pH is <7.0. In this severe acidosis, give 100 mmol of sodium bicarbonate over 2 hours. It is not recommended for pH ≥7.0, as insulin therapy and fluids will correct the acidosis.

4. What are the criteria for “resolution” of DKA?

DKA is considered resolved when the patient meets all of the following: β-hydroxybutyrate <0.6 mmol/L and venous pH ≥7.3 (or serum bicarbonate ≥18 mmol/L); the serum anion gap is no longer recommended for assessing resolution because hyperchloremic acidosis can keep it elevated. HHS resolution is primarily defined by normal effective osmolality and mental status. The DKA & HHS Treatment Guideline stresses that all criteria must be met.

5. How do I safely transition from an IV insulin drip to subcutaneous (SubQ) insulin?

This is a critical step. Once DKA is resolved and the patient can eat, initiate their home-dose or weight-based long-acting (basal) SubQ insulin. CRITICAL: You must continue the IV insulin infusion for 1-2 hours AFTER the subcutaneous basal insulin is given to allow it to take effect. Stopping the IV drip before this overlap will result in rebound hyperglycemia and ketoacidosis. This is a key part of any DKA & HHS Treatment Guideline.

Related Calculators

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• Winters’ Formula Calculator
• Serum Osmolality & Osmolar Gap Calculator
• HOMA-IR Calculator
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