ICU Psychosis

About this course

Intensive Care Unit (ICU) psychosis is a spectrum of severe psychiatric symptoms that manifest in an ICU environment. Often occurring in critically ill patients undergoing intensive medical interventions, these symptoms may include delirium, a significant clinical concern that is associated with higher mortality rates. This course examines ICU psychosis, detailing its mechanism of action, causes, and symptoms. It also delves into its differential diagnoses, treatment options, preventative measures, and nursing considerations necessary to address the complex interplay of factors contributing to this phenomenon within the critical care setting.

Learning objectives

• Review the definition of Intensive Care Unit (ICU) psychosis and how neurobiological mechanisms impact the manifestation of the diagnosis.
• Review diagnostic criteria for ICU psychosis and ICU psychosis classification.
• Identify symptoms, causes and differential diagnoses of ICU psychosis.
• Review pharmacologic and nonpharmacologic treatment measures, and preventative measures to reduce the risk of ICU psychosis in the healthcare setting.
• Understand the nursing considerations for assessing for and managing ICU psychosis.

Course outline

29 sections · finish in any order across devices

1. 1

   Introduction

   Intensive Care Unit (ICU) psychosis is a spectrum of severe psychiatric symptoms that manifest in an ICU environment. Often occurring in critically ill patients undergoing intensive medical interventions, these symptoms may include delirium, a significant clinical concern that is associated with hig

   4 min

2. 2

   Definition of Intensive Care Unit (ICU) Psychosis

   Intensive Care Unit (ICU) psychosis is a spectrum of severe psychiatric symptoms seen specifically in ICU environments. While its pathophysiology is not completely understood, its manifestation has been linked to several neurobiological mechanisms, including the acetylcholine, dopamine, and gamma-am

   4 min

3. 3

   Diagnostic Criteria for ICU Psychosis

   Diagnostic criteria for ICU psychosis are crucial for accurate identification and intervention. Two widely utilized frameworks for assessing delirium in the intensive care setting are the criteria outlined in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) and the Co

   4 min

4. 4

   Feature 2: Inattention

   Number of Errors >2 →

   4 min

5. 5

   Feature 4: Disorganized Thinking

   Ask the following Yes/No Questions:

   4 min

6. 6

   Classifications

   ICU psychosis, particularly when classified within the spectrum of delirium, can be categorized based on psychomotor behavior. Delirium is commonly classified into subtypes according to the predominant features of psychomotor activity. The three primary categories are hyperactive delirium, hypoactiv

   4 min

7. 7

   Causes

   The frequency of ICU psychosis occurrence, compared to total ICU admissions, is a significant clinical concern. Studies suggest that a substantial proportion of ICU patients experience delirium during their hospitalization, emphasizing the need for targeted interventions to address factors that caus

   4 min

8. 8

   Environmental Factors

   The ICU experience induces profound stress on patients. The critical nature of their illness, coupled with the uncertainty of the treatment course and the loss of control over their circumstances, leads to significant psychological stress. The ICU environment itself further exacerbates this mental a

   4 min

9. 9

   Medical Causes

   The underlying pathophysiology of critical illness, whether stemming from a severe disease, trauma, or surgical intervention, imposes substantial stress on the body. Combined with other underlying conditions, infections, or complications such as cardiac failure can result in further systemic issues

   4 min

10. 10

    Symptoms

    ICU psychosis encompasses a range of severe psychiatric symptoms that profoundly impact a patient's cognitive and perceptual functions within the intensive care unit (ICU) setting. Among the most prominent symptoms is a fluctuating level of consciousness, where patients may oscillate between aggress

    4 min

11. 11

    Onset and Duration of Symptoms

    The onset and duration of symptoms associated with ICU psychosis are influenced by the critical care environment and the individual patient's clinical condition. ICU psychosis typically manifests acutely, often emerging within the first 24- 48 hours of the patient's admission to the intensive care u

    4 min

12. 12

    Differential Diagnoses

    Differential diagnoses for ICU psychosis involve considering alternative explanations for the observed psychiatric symptoms. Several other conditions may mimic aspects of ICU psychosis but differ in underlying etiologies. A comprehensive evaluation, including medical history, laboratory tests, imagi

    4 min

13. 13

    Primary Psychiatric Disorders

    Primary psychiatric disorders, such as schizophrenia, bipolar disorder, and major depressive disorder, are chronic and enduring conditions that can share certain clinical features with ICU psychosis. For example, patients with schizophrenia may experience hallucinations, delusions, and disorganized

    4 min

14. 14

    Substance-Induced Psychotic Disorders

    Substance-induced psychotic disorders refer to the development of psychotic symptoms resulting from the use, withdrawal, or intoxication of certain substances, including alcohol, hallucinogens, stimulants, and other psychoactive substances. The hallmark feature of such a disorder is the presence of

    4 min

15. 15

    Neurological Disorders

    Neurological disorders are conditions that specifically affect the CNS, such as seizures, encephalitis, or brain tumors, potentially leading to altered consciousness, hallucinations, and cognitive disturbances like ICU psychosis. However, neurological disorders often present with a more gradual onse

    4 min

16. 16

    Metabolic Disorders

    Metabolic disorders such as electrolyte imbalances, hypoglycemia, or hyperglycemia can contribute to neuropsychiatric symptoms, including confusion and altered mental status. While the onset of symptoms may be acute and occur in critical care settings, metabolic disorders are identified via laborato

    4 min

17. 17

    Endocrine Disorders

    Hormonal imbalances from disorders in endocrine organs, such as the thyroid, adrenal glands, or pituitary gland can lead to disturbances, including confusion, altered mental status, or cognitive impairment. For example, hypothyroidism may lead to cognitive slowing and memory deficits. While symptoms

    4 min

18. 18

    Infectious Encephalopathies

    Infectious encephalopathies are conditions that affect the CNS, such as meningitis or encephalitis. These infections cause inflammation in the brain and the gradual appearance of cognitive dysfunction, which progressively increases as opposed to the fluctuations seen in ICU psychosis. Diagnostic eva

    4 min

19. 19

    Autoimmune Disorders

    Certain autoimmune conditions, such as autoimmune encephalitis or systemic lupus erythematosus (SLE), can cause abnormal immune responses, leading to inflammation and damage to various tissues, including the CNS, resulting in neuropsychiatric symptoms. However, unlike the variations seen in ICU psyc

    4 min

20. 20

    Traumatic Brain Injury (TBI)

    Traumatic brain injury TBI involves physical trauma to the head, resulting in structural damage to the brain. Patients with a history of recent trauma may exhibit psychiatric symptoms resembling ICU psychosis, however TBI symptoms are typically progressive and may lead to permanent cognitive impairm

    4 min

21. 21

    Paraneoplastic Syndromes

    Paraneoplastic syndromes are a group of rare disorders triggered by an immune response to an underlying malignancy, leading to systemic effects and neurological manifestations. If associated with the CNS, these disorders may present with cognitive disturbances resembling aspects of ICU psychosis. Ho

    4 min

22. 22

    Medication Side Effects or Toxicity

    Certain medications, particularly those administered in the ICU setting can contribute to cognitive disturbances, altered consciousness, and perceptual abnormalities. These effects may be dose-dependent or related to patient factors such as age, renal or hepatic function, or drug interactions. Commo

    4 min

23. 23

    Treatment Options

    Treating ICU psychosis requires a multidimensional approach, considering both pharmacological and non-pharmacological interventions. While there is no definitive therapy proven to decrease the duration or severity of symptoms, it is imperative to manage the underlying physiological issues and factor

    4 min

24. 24

    Preventative Measures

    Preventing the onset or minimizing the impact of ICU psychosis involves a multifaceted approach that integrates a combination of strategies. These measures encompass collaboration among various medical specialties, careful pharmacological interventions, and non-pharmacological approaches to create a

    4 min

25. 25

    Pharmacological Interventions

    The use of antipsychotic medications as a prophylactic measure, especially in patients deemed at high risk for developing ICU psychosis, has been a topic of considerable discussion within the medical community. The rationale behind this approach stems from the desire to pre-emptively address the neu

    4 min

26. 26

    Sedation Management

    A targeted sedation management strategy is a critical aspect of preventing delirium within intensive care. By adopting a systematic approach to sedation, healthcare providers aim to strike a delicate balance between ensuring patient comfort and minimizing the risk of cognitive disturbances. Avoiding

    4 min

27. 27

    Non-pharmacological Interventions

    Non-pharmacological interventions focus on addressing the environmental factors that have been shown to contribute to ICU psychosis. These interventions include environmental modifications such as establishing regular day-night cycles by providing adequate lighting during the day and dimming lights

    4 min

28. 28

    Nursing Considerations

    When managing a patient with ICU psychosis or managing one who is at risk of developing the condition, several nursing considerations should be considered to ensure prompt and comprehensive intervention. These responsibilities encompass observation, documentation, patient safety measures, and collab

    4 min

29. 29

    Conclusion

    ICU psychosis in critically ill patients stems from a complex interplay of neurobiological mechanisms and environmental stressors within the ICU environment. These factors contribute to structural changes in the brain, underlining the cognitive dysfunction observed. Given its profound implications f

    4 min

This course satisfies

Requirement summaries come from our state requirement records. Always confirm details with your board before you renew.

References and resources

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