What Does LST Mean in Medical Terms?

LST stands for life-sustaining treatment. Treatments that prolong life in serious illness.

Where you will see LST

You will most often see LST in nursing notes, care plans and handovers, emergency department and intensive care records.

Example

A chart note might use “LST” as shorthand for life-sustaining treatment when documenting a patient's care.

Related abbreviations

• 1:1 — one-to-one observation
• 2g Na diet — two-gram sodium diet
• 3% saline — three percent saline (hypertonic)
• 3D-CAM — 3-minute Diagnostic Confusion Assessment Method
• 4-point restraints — four-point restraints
• 4F-PCC — four-factor prothrombin complex concentrate
• 5150 — 5150 hold (California)
• 5150 hold eval — 72-hour hold evaluation

Browse the full Medical Abbreviations guide — 5,715 entries, searchable A–Z and by specialty.