Online Medical Tools — Nu-DESC
Printed on 9/3/2026
For informational purposes only. This is not medical advice.
Nu-DESC
The Nursing Delirium Screening Scale (Nu-DESC) is a rapid bedside delirium screen scored by nursing observation. Five domains are each scored 0-2 (disorientation, inappropriate behavior, inappropriate communication, illusions/hallucinations, psychomotor retardation), for a total range of 0-10.
Formula: Nu-DESC total = sum of 5 observed items scored 0-2 each (range 0-10).
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How It Works
Score Five Observed Behavioral Domains (0-2 Each)
The Nu-DESC is completed by a nurse based on behavioral observations during the current or preceding shift. Five domains are assessed: (1) Disorientation — patient does not recognize surroundings, place, or persons; (2) Inappropriate behavior — behavior inconsistent with context, including pulling at tubes or agitated movements; (3) Inappropriate communication — incoherent or nonsensical statements; (4) Illusions or hallucinations — patient reports or reacts to objects or persons not present; (5) Psychomotor retardation — patient is unusually drowsy, sluggish, or has slowed motor responses. Each domain is scored 0 (absent), 1 (mild or intermittent), or 2 (severe or persistent), for a maximum total of 10.
Sum the Five Domain Scores to Get the Nu-DESC Total
After scoring all five behavioral domains, the Nu-DESC total is calculated by simple summation of the five scores (range 0–10). A higher total indicates a greater burden of delirium-compatible behaviors observed during the shift. The scoring is designed to be completed rapidly at the end of a nursing shift — typically in 1 to 2 minutes — as part of routine nursing handover documentation. No specialized assessment tools or equipment are required.
Apply the Threshold and Escalate Positive Screens
A Nu-DESC total score of 2 or more is the standard positive threshold for delirium screening. A positive screen should trigger escalation to a full clinical delirium assessment: the [CAM](/tools/cam-delirium) for non-ICU patients, or [4AT](/tools/4at-delirium) for rapid bedside delirium confirmation. Positive screening should also prompt immediate medical review — delirium has multiple potentially reversible causes (infection, medication toxicity, metabolic derangement, pain, urinary retention) and untreated delirium is associated with prolonged hospitalization, functional decline, and increased mortality.
Who Uses the Nu-DESC
Routine Shift-Change Delirium Surveillance on Medical Wards
Ward nurses, charge nurses, clinical nurse specialists
The Nu-DESC was specifically designed for integration into routine nursing shift handover as a structured delirium surveillance tool. Administered at each nursing shift change — typically three times per day — the Nu-DESC enables systematic, repeatable delirium detection across the full 24-hour hospitalization period. This is particularly important for hypoactive delirium, which is often missed by physicians during brief daytime rounds because the characteristic features (drowsiness, reduced communication, psychomotor slowing) may be most evident during night or early morning nursing shifts.
Post-Operative Delirium Detection in Surgical Wards
Surgical ward nurses, post-anesthesia care nurses, surgical team
Post-operative delirium affects 15–20% of older surgical patients and up to 50% of patients after hip fracture repair or cardiac surgery. The Nu-DESC is ideally suited to post-operative delirium surveillance because its brief, observation-based format can be completed without disturbing recovering patients. Nu-DESC positive screens in post-operative patients should trigger review for surgical causes (pain, urinary retention, hemodynamic instability) alongside systemic causes including medication toxicity and metabolic derangements.
Palliative Care and Oncology Delirium Monitoring
Palliative care nurses, oncology ward nurses, hospice nurses
Delirium is the most common neuropsychiatric complication in advanced cancer and palliative care settings, affecting 26–44% of patients on palliative care units and up to 88% in the last hours to days of life. The Nu-DESC provides a practical shift-based delirium screen that is well-tolerated in this population because it does not require cognitive testing. The psychomotor retardation domain is particularly relevant in palliative settings, where sedation-related hypoactive delirium from opioids is the most common subtype.
ICU Delirium Surveillance in Non-Ventilated Patients
ICU nurses, step-down unit nurses, progressive care unit nursing teams
Delirium occurs in 20–80% of ICU patients and is independently associated with prolonged ICU stay, cognitive impairment at discharge, and 1-year mortality. In non-mechanically ventilated ICU and step-down patients, the Nu-DESC supplements formal delirium instruments such as CAM-ICU as an additional continuous behavioral surveillance tool. The psychomotor retardation domain is particularly useful for detecting hypoactive delirium associated with excess sedation, sepsis encephalopathy, and hepatic encephalopathy.
Emergency Department Delirium Detection
Emergency nurses, triage nurses, emergency medicine physicians
Delirium in the emergency department affects approximately 10% of older adults presenting acutely and up to 40% of nursing home residents brought to the ED, but is missed by clinical impression alone in up to 70% of cases. The Nu-DESC can be applied by ED nurses to rapidly flag delirium-compatible behaviors during triage and assessment without requiring formal cognitive testing. A positive Nu-DESC in the ED should trigger medical review for causes before disposition decisions, since delirium may be the presenting sign of serious acute illness requiring treatment rather than discharge.
Pro Tips
Hypoactive Delirium Is Detected Through the Psychomotor Retardation Domain
Hypoactive delirium — the quiet, drowsy delirium subtype — is the most commonly missed by clinical impression. On the Nu-DESC, hypoactive delirium primarily elevates the psychomotor retardation domain. When nurses observe an unusually drowsy patient who seems out of it rather than agitated, this domain should be scored positively. A Nu-DESC positive driven mainly by psychomotor retardation warrants urgent medical review for causes of sedation (opioids, benzodiazepines, metabolic encephalopathy).
Score Based on Nursing Observations, Not Patient Self-Report
The Nu-DESC is a nurse-rated observation scale, not a patient-administered questionnaire. Scoring should be based entirely on what the nurse directly observed during the shift. Do not ask the patient to rate their own symptoms. Delirious patients frequently lack awareness of their own confusion, so patient self-report would systematically undercount delirium behaviors.
Compare to Prior Shifts to Detect Acute Change
Delirium is defined in part by acute onset and fluctuating course. When reviewing a Nu-DESC score, compare it to the scores from prior nursing shifts to identify acute changes — a patient who scored 0 on the day shift but scores 4 on the night shift has a clinically significant acute change. Document Nu-DESC trends, not just single values, in nursing progress notes.
A Nu-DESC of 0 Does Not Absolutely Rule Out Delirium
The Nu-DESC has sensitivity of approximately 86% at the score-2 threshold, meaning approximately 14% of patients with clinical delirium may score below 2 at a given shift assessment. Delirium fluctuates by nature. If clinical suspicion for delirium is high, supplement Nu-DESC with formal CAM or 4AT assessment regardless of the Nu-DESC result.
Sedation Confounds Scoring — Document Sedation Level
In patients receiving opioids, benzodiazepines, or antipsychotics, the psychomotor retardation domain may be elevated as a direct pharmacological effect rather than delirium. Always document the patient's current sedation level (using RASS or similar scale) alongside the Nu-DESC score. In heavily sedated patients, Nu-DESC scores should be interpreted cautiously.
Administer at Every Shift Change for Optimal Detection
The Nu-DESC achieves maximum clinical value when administered consistently at every nursing shift change throughout hospitalization. Delirium frequently develops 24–48 hours after admission, and its onset is often subtle on the first affected shift. Routine Nu-DESC at every shift change ensures that early delirium signals are captured before the syndrome is fully established.
Pair With Non-Pharmacological Delirium Prevention Bundles
When a Nu-DESC positive screen is identified, complement the delirium assessment with a structured review of predisposing factors (age 70+, cognitive impairment, dehydration, sensory impairment) and precipitating factors (new medications, sleep deprivation, immobility, catheters, pain). Non-pharmacological delirium prevention bundles targeting these factors are the most effective strategy for reducing delirium duration and severity.
Common Questions About Your Results
Evidence-Based Methodology
Nu-DESC has been validated as a brief bedside delirium screen with practical use in inpatient and perioperative settings.
Clinical Content Trust
- Last reviewed:
- April 21, 2026
- Guideline version:
- General evidence framework v2026.04
- Source set version:
- Primary-source set v1
How to Interpret Your Result
Higher Nu-DESC scores indicate stronger delirium signal; >=2 is commonly considered screen-positive.
When to Use This Tool
Use for routine inpatient delirium screening, especially when repeat nursing observation is feasible.
Limitations
Screen performance depends on observation quality and may be affected by communication barriers, sedation, and neurologic comorbidity.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
Sources
Changelog
April 21, 2026 · trust-baseline
Clinical trust metadata enabled for this tool page with structured review/version fields.
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