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KembaraXtra- Medicine – Acute Stress Disorder
Acute stress disorder (ASD) is a trauma-related condition characterized by severe acute stress reactions that occur between 3 days and 1 month following exposure to a traumatic event. Trauma exposure may be direct, witnessed, learned about when it occurs to a close family member or friend, or experienced through repeated or extreme exposure to traumatic details. ASD represents an early posttraumatic response and is distinct from posttraumatic stress disorder (PTSD), which is diagnosed when symptoms persist beyond one month.
The prevalence of ASD varies depending on the type of traumatic exposure. Rates are generally below 20% following non–interpersonal traumas such as motor vehicle accidents, traumatic brain injury, or severe burns. Prevalence is estimated at approximately 14% following war-related trauma and rises substantially, ranging from 20% to 50%, following interpersonal trauma such as sexual assault or witnessing mass violence. ASD occurs more frequently in females than in males. It can be diagnosed across the lifespan, although symptom expression differs by age; for example, children may experience trauma-related dreams without direct trauma content and may not verbalize fear. Genetic vulnerability may contribute, with differential serotonin transporter functioning (e.g., 5-HTTLPR variants) potentially influencing trauma responses. Higher prevalence among women may reflect both increased exposure to interpersonal violence and sex-related neurobiological differences in stress reactivity.
Risk factors for ASD include greater perceived severity of the trauma, catastrophic interpretations of the event, exaggerated expectations of future harm, hopelessness, high negative affect, avoidant coping styles, prior trauma exposure, lack of social support, and the presence of preexisting psychiatric disorders such as anxiety or depression. These factors influence both symptom onset and severity following trauma.
Diagnosis of ASD is based on DSM-5 criteria. Individuals must have been exposed to actual or threatened death, serious injury, or sexual violation and must experience nine or more symptoms from five symptom clusters: intrusion, negative mood, dissociation, avoidance, and arousal. Intrusion symptoms include distressing memories, nightmares, flashbacks, and psychological or physiological distress when exposed to trauma reminders. Negative mood is reflected in an inability to experience positive emotions. Dissociative symptoms include altered sense of reality or inability to recall aspects of the trauma. Avoidance involves efforts to evade trauma-related thoughts, feelings, or external reminders. Arousal symptoms include sleep disturbance, irritability, hypervigilance, difficulty concentrating, and exaggerated startle response. Symptoms must persist for at least 3 days and no longer than 1 month after trauma exposure and must cause clinically significant impairment in functioning. Symptoms must not be attributable to substances, medical conditions, or other psychiatric disorders such as brief psychotic disorder. If symptoms persist beyond one month, PTSD should be considered.
The etiology of ASD is multifactorial and not fully established. Dissociative models suggest that individuals cope with overwhelming trauma by restricting awareness of emotional experiences. Cognitive models emphasize maladaptive appraisals, avoidance, distraction, and dysfunctional beliefs about responsibility or threat. Biological theories focus on acute trauma-related alterations in neurobiological systems, including dysregulation of cortisol, catecholamines, glucocorticoids, serotonin, and endogenous opioids, which collectively mediate stress responses.
Diagnosis is made through clinical interviews that assess trauma exposure, symptom onset, duration, and functional impairment. Structured clinical interviews and standardized self-report measures may assist diagnosis and severity assessment. Common tools include the Acute Stress Disorder Scale, Acute Stress Disorder Interview, and Stanford Acute Stress Reaction Questionnaire. Because dissociation may interfere with memory of the trauma or emotional responses, collateral information from family members, medical providers, or therapists is often helpful. No laboratory tests or imaging studies are indicated for ASD.
Treatment emphasizes early, supportive, and trauma-informed care. Initial interventions focus on establishing a therapeutic alliance, normalizing emotional reactions, and addressing immediate distress. Resilience-oriented psychosocial interventions aim to improve tolerance of trauma-related distress, reduce avoidance behaviors, identify and manage triggers, improve sleep disturbances and nightmares, strengthen social support, reduce functional impairment, limit overgeneralization of danger, and correct maladaptive trauma-related beliefs. Early behavioral and educational interventions show small to moderate benefits in reducing trauma-related symptoms. In cases involving interpersonal violence, safety planning is essential when individuals remain in unsafe environments.
Psychotherapy is the first-line treatment for ASD. Evidence-based nonpharmacologic interventions include cognitive behavioral therapy (CBT), cognitive processing therapy (CPT), and relaxation-based approaches such as mindfulness. Pharmacologic treatment is generally reserved for individuals who do not respond adequately to psychotherapy. There are currently no FDA-approved medications for ASD, although clinicians may consider medications approved for PTSD, including selective serotonin reuptake inhibitors such as sertraline or paroxetine. Acute pharmacologic management may be necessary in emergencies involving severe agitation, dangerous behavior, or psychosis, using short-acting benzodiazepines or neuroleptics when appropriate. Antiadrenergic agents, including β-blockers, may help reduce arousal symptoms. Prazosin is recommended for trauma-related nightmares. Benzodiazepines may provide short-term relief for insomnia or anxiety, but prolonged use is discouraged due to associations with increased long-term PTSD risk.
Complementary approaches such as yoga, meditation, relaxation response breathing, progressive muscle relaxation, and mindfulness practices may be beneficial for symptom relief. Eye movement desensitization and reprocessing (EMDR) has shown promise in reducing ASD symptoms, although further research is needed to clarify its effects relative to natural recovery.
Most individuals with ASD can be safely managed in an outpatient setting. Higher levels of care, including partial or inpatient hospitalization, may be necessary for patients with severe symptoms, comorbid psychiatric or medical conditions, or suicidal or homicidal ideation. Care should be delivered in the least restrictive environment that ensures safety. Referral to a qualified mental health clinician is recommended for diagnosis and treatment.
Although ASD may precede PTSD in some individuals, many people with ASD recover without developing PTSD. Current evidence suggests that ASD criteria alone are not sufficient for predicting PTSD risk. Research indicates that focusing on symptom subtypes, particularly high arousal symptoms, may improve prediction of later PTSD. Culturally sensitive assessment tools and culturally humble clinical practices are essential when working with diverse populations. Trauma patients discharged within 72 hours of hospital admission should be rescreened after discharge to detect emerging symptoms.
Preventive interventions such as single-session psychological debriefing or critical incident stress debriefing have not demonstrated effectiveness and are no longer routinely recommended. In contrast, psychological first aid (PFA) focuses on promoting safety, calmness, social connection, and hope, and has demonstrated benefits in reducing negative affect and enhancing positive affect shortly after trauma.
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